Special cleaning heat exchanger
However, the heat exchanger fouling and severe congestion, such as condensation,cooler, usually because the water contains large amounts of calcium and magnesium ions, when the water through the tube bundle heat exchanger tube surface evaporation, precipitation of calcium and magnesium deposition in the wall to form a hard scale layers, with the general approach to be ineffective, it must be such aschemical or mechanical cleaning methods.
Chemical cleaning is the use of cleaning agents and dirt layer from the chemical reaction method to remove the fouling, for more complex shape of the cleaningcomponents, such as the U-tube heat exchanger cleaning, pipe cleaning between.This cleaning method is that the metal has a slight corrosion injury. Mechanicalcleaning is the easiest blade, rotary wire brush to remove the hard dirt floor, coke or other deposits.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月30日星期五
Pressure vessel coated with anti-corrosion
Pressure vessel coated with anti-corrosion coatings
Pressure vessel inspection by the Quality Division personnel inspected themanufacturing quality of the coating allows the coating corrosion.
Before coating the metal surface should be kept dry, uneven and scratches on thesurface, should be used to make grinding to remove the smooth transition is not allowed to play putty.
Anti-corrosion primer paint in addition to playing selected varieties according toconstruction plans, but still need to add intermediate coating a polyurethane paint,such as the pattern of the coating anti-corrosion coatings no special requirements,the outer surface of the pressure vessel shell should be
Pressure vessel shell exterior top coat primer 2, primer dry film thickness shall be notless than 30μm, the outer surface of the container under normal circumstances still need to finish a coating, paint color should be pale. If thermal insulation of pressure vessels or not coated finish, only primer and intermediate paint.
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Keywords: reactor, heat exchanger, pressure vessel
Pressure vessel inspection by the Quality Division personnel inspected themanufacturing quality of the coating allows the coating corrosion.
Before coating the metal surface should be kept dry, uneven and scratches on thesurface, should be used to make grinding to remove the smooth transition is not allowed to play putty.
Anti-corrosion primer paint in addition to playing selected varieties according toconstruction plans, but still need to add intermediate coating a polyurethane paint,such as the pattern of the coating anti-corrosion coatings no special requirements,the outer surface of the pressure vessel shell should be
Pressure vessel shell exterior top coat primer 2, primer dry film thickness shall be notless than 30μm, the outer surface of the container under normal circumstances still need to finish a coating, paint color should be pale. If thermal insulation of pressure vessels or not coated finish, only primer and intermediate paint.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月29日星期四
Stainless steel reactor temperature control
Stainless steel reactor temperature control
Stainless steel reactor temperature adaptive control adaptive control system in the control process (such as chemical reaction process) the process of continuousadjustment process PID parameters to give the best control of temperature andresponse time, this process is through effective multi-faceted determination oftemperature, temperature changes and the rate of temperature change to achieve.
Stainless steel blender has a single reactor is less than satisfied with her inability tochemical production requirements, then manipulate the dual mixer or external pumpforced circulation has become a growing trend in the future. Stainless steel reactor to increase the thermal insulation means, follow the progress of heat, so heat loss downto a minimum, fully integrated control waste heat or heat can be generated after the reaction, after the direction of growth will therefore.
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Keywords: reactor, heat exchanger, pressure vessel
Stainless steel reactor temperature adaptive control adaptive control system in the control process (such as chemical reaction process) the process of continuousadjustment process PID parameters to give the best control of temperature andresponse time, this process is through effective multi-faceted determination oftemperature, temperature changes and the rate of temperature change to achieve.
Stainless steel blender has a single reactor is less than satisfied with her inability tochemical production requirements, then manipulate the dual mixer or external pumpforced circulation has become a growing trend in the future. Stainless steel reactor to increase the thermal insulation means, follow the progress of heat, so heat loss downto a minimum, fully integrated control waste heat or heat can be generated after the reaction, after the direction of growth will therefore.
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Keywords: reactor, heat exchanger, pressure vessel
Pressure vessel cladding layer quality
Pressure vessel cladding layer quality
1 pressure vessel cladding layer quality when used with most surfacing weld mustcontrol the amount of overlap between 6 ~ 8mm, welding arc welding, the weldoverlap between the lap of not less than the width of the weld.
2 pressure vessel cladding layer after surfacing weld quality difference between thelevel of not more than 0.5mm, cladding layer between the surface and not allowed inthe weld bead and the substrate material between the undercut defects.
3-layer pressure vessel welding quality requirements after the transition layer and thecorrosion layer of surfacing required for UT inspection were detected between theweld and the fusion of the substrate and the solder layer height.
4 pressure vessel cladding layer after surfacing quality and timely weld spatter to clean up both sides of the impurities, there is no weld overlay surface porosity, slagand other defects.
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Keywords: reactor, heat exchanger, pressure vessel
1 pressure vessel cladding layer quality when used with most surfacing weld mustcontrol the amount of overlap between 6 ~ 8mm, welding arc welding, the weldoverlap between the lap of not less than the width of the weld.
2 pressure vessel cladding layer after surfacing weld quality difference between thelevel of not more than 0.5mm, cladding layer between the surface and not allowed inthe weld bead and the substrate material between the undercut defects.
3-layer pressure vessel welding quality requirements after the transition layer and thecorrosion layer of surfacing required for UT inspection were detected between theweld and the fusion of the substrate and the solder layer height.
4 pressure vessel cladding layer after surfacing quality and timely weld spatter to clean up both sides of the impurities, there is no weld overlay surface porosity, slagand other defects.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月28日星期三
Heat exchanger tubes stitching
Heat exchanger tubes stitching should meet the following requirements:
Heat exchanger tubes splicing, welding butt joints should be assessed. The number of specimens, size, test methods according to JB4708 requirements; aluminum, copper, titanium welded joints can be implemented by reference.
Heat exchanger tubes stitching, butt weld with a heat exchange tube, straight tube not more than one; U-shaped tube not more than two; the shortest tube length not less than 300mm; including at least 50mm of straight pipe U-bend section of the rangeshall not have WELDS.
Heat exchanger tubes splicing, the pipe end bevel should be processed by mechanical methods, should be cleaned before welding.
Heat exchanger tubes splicing, the corresponding amount of the wrong side of the wall thickness of the tubes should not exceed 10% and not more than 0.3mm, straightness deviation will not affect the smooth tube wear is limited.
Heat exchanger tubes after docking, the table should be selected steel ball diameter on the inspection of welded joints to pass the ball to the ball to pass through.
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Heat exchanger tubes splicing, welding butt joints should be assessed. The number of specimens, size, test methods according to JB4708 requirements; aluminum, copper, titanium welded joints can be implemented by reference.
Heat exchanger tubes stitching, butt weld with a heat exchange tube, straight tube not more than one; U-shaped tube not more than two; the shortest tube length not less than 300mm; including at least 50mm of straight pipe U-bend section of the rangeshall not have WELDS.
Heat exchanger tubes splicing, the pipe end bevel should be processed by mechanical methods, should be cleaned before welding.
Heat exchanger tubes splicing, the corresponding amount of the wrong side of the wall thickness of the tubes should not exceed 10% and not more than 0.3mm, straightness deviation will not affect the smooth tube wear is limited.
Heat exchanger tubes after docking, the table should be selected steel ball diameter on the inspection of welded joints to pass the ball to the ball to pass through.
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Pressure vessel transport Tips
Pressure vessel transport
Pressure vessels and transport should be based on the specific circumstances of thepackaging design. Design should consider the following requirements:
a. smaller overall pressure vessels, skids can be fixed to the carrying vehicle or ship.
b. larger, long length of the pressure vessel, must be supported with the bracket andtighten the hoop with a confining pressure vessels in the bay, in the tension between the pressure vessel hoop and pad to be flexible material, bracket should be firmlyfixed to the carrying vehicle or ship. Weight of 1 to 10 tons of pressure vessels, can be used wooden brackets; weight> 10 tonnes nominal diameter> 3000mm container,steel bracket should be used (with the exception saddle).
c. nominal diameter ≥ 2600mm or length> 12000mm the pressure vessel, the bottom of both sides of the package should be set at a fixed plate hook. Weight ≥ 30 tons ofpressure vessels, transport should be set up on both sides of the top bracket with thelug.
d. bracket should be set to prevent the pressure vessel deformation.
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Keywords: reactor, heat exchanger, pressure vessel
Pressure vessels and transport should be based on the specific circumstances of thepackaging design. Design should consider the following requirements:
a. smaller overall pressure vessels, skids can be fixed to the carrying vehicle or ship.
b. larger, long length of the pressure vessel, must be supported with the bracket andtighten the hoop with a confining pressure vessels in the bay, in the tension between the pressure vessel hoop and pad to be flexible material, bracket should be firmlyfixed to the carrying vehicle or ship. Weight of 1 to 10 tons of pressure vessels, can be used wooden brackets; weight> 10 tonnes nominal diameter> 3000mm container,steel bracket should be used (with the exception saddle).
c. nominal diameter ≥ 2600mm or length> 12000mm the pressure vessel, the bottom of both sides of the package should be set at a fixed plate hook. Weight ≥ 30 tons ofpressure vessels, transport should be set up on both sides of the top bracket with thelug.
d. bracket should be set to prevent the pressure vessel deformation.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月27日星期二
Knowledge of plate heat exchanger
Knowledge of plate heat exchanger
Plate heat exchanger consists of a set of rectangular thin metal heat transfer plateform, with the frame assembly of the clamping plate on the bracket. Plate heat exchanger consists of a set of rectangular thin metal heat transfer plate form, with theframe assembly of the clamping plate on the bracket.
Plate heat exchanger plates of two adjacent edges lined pads (all made of rubber orcompressed asbestos, etc.) pressed the plates are square hole, the edges of two adjacent plates lined with gasket (variety of made of rubber or compressedasbestos, etc.) pressed the plates are square hole, forming a hole fluid channel, as shown. Alternately hot and cold fluid flow on both sides of the plate through the plateheat exchanger.
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Keywords: reactor, heat exchanger, pressure vessel
Plate heat exchanger consists of a set of rectangular thin metal heat transfer plateform, with the frame assembly of the clamping plate on the bracket. Plate heat exchanger consists of a set of rectangular thin metal heat transfer plate form, with theframe assembly of the clamping plate on the bracket.
Plate heat exchanger plates of two adjacent edges lined pads (all made of rubber orcompressed asbestos, etc.) pressed the plates are square hole, the edges of two adjacent plates lined with gasket (variety of made of rubber or compressedasbestos, etc.) pressed the plates are square hole, forming a hole fluid channel, as shown. Alternately hot and cold fluid flow on both sides of the plate through the plateheat exchanger.
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Keywords: reactor, heat exchanger, pressure vessel
Tips for Pressure vessel pressure gauge
Pressure vessel pressure gauge of the following conditions should stop using:
1. Limited only nail gauge, in the absence of pressure, the pointer can not be returned to obstructing the nail place; infinite gauge nails only, in the absence of pressure, the value of the pointer from the zero position error exceeds the allowable pressure gauge;
2. Cover glass pressure vessel rupture or dial gauge dial scale blurred;
3 pressure vessels, pressure gauge calibration seal is damaged or exceed theperiod of validity;
4 spring pressure vessel pressure gauge table loose tube leakage or pressure gauge;
5 other effects gauge accurate indication of the pressure vessel defects.
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Keywords: reactor, heat exchanger, pressure vessel
1. Limited only nail gauge, in the absence of pressure, the pointer can not be returned to obstructing the nail place; infinite gauge nails only, in the absence of pressure, the value of the pointer from the zero position error exceeds the allowable pressure gauge;
2. Cover glass pressure vessel rupture or dial gauge dial scale blurred;
3 pressure vessels, pressure gauge calibration seal is damaged or exceed theperiod of validity;
4 spring pressure vessel pressure gauge table loose tube leakage or pressure gauge;
5 other effects gauge accurate indication of the pressure vessel defects.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月26日星期一
Pressure vessel safety valve installation
Pressure vessel safety valve installation requirements
1. Safety valve should be installed vertical, and should be installed in the pressure vessel vapor space above the liquid, or gas pressure vessel and connected to the pipeline to link the space.
2. Pressure vessel and safety valve connected between the pipe and fittings through-hole, the valve cross-sectional area not less than the import area.
3. Port on the pressure vessel a number of safety valves installed, then the connectionport entrance area, a number of safety valves should be at least equal to the sum ofthe import area.
4. Pressure vessel and safety valve should be installed between the intermediate cut-off valve. For packages containing flammable, toxic level of extreme, high, moderatehazard or viscous medium pressure vessel, safety valve for ease of replacement, cleaning, can be installed between the pressure vessel and safety valve stop valve,globe valve structure and pass diameter size should not prevent the normal dischargevalve. Pressure vessel during normal operation, the valve must remain open, and addseals.
5. Safety valve installation position, should be easy inspection and maintenance.
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1. Safety valve should be installed vertical, and should be installed in the pressure vessel vapor space above the liquid, or gas pressure vessel and connected to the pipeline to link the space.
2. Pressure vessel and safety valve connected between the pipe and fittings through-hole, the valve cross-sectional area not less than the import area.
3. Port on the pressure vessel a number of safety valves installed, then the connectionport entrance area, a number of safety valves should be at least equal to the sum ofthe import area.
4. Pressure vessel and safety valve should be installed between the intermediate cut-off valve. For packages containing flammable, toxic level of extreme, high, moderatehazard or viscous medium pressure vessel, safety valve for ease of replacement, cleaning, can be installed between the pressure vessel and safety valve stop valve,globe valve structure and pass diameter size should not prevent the normal dischargevalve. Pressure vessel during normal operation, the valve must remain open, and addseals.
5. Safety valve installation position, should be easy inspection and maintenance.
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Keywords: reactor, heat exchanger, pressure vessel
Laboratory reactor knowledge
Laboratory reactor with a small introduction of knowledge
A small laboratory reactor placed in the room. More than one reactor in the equipment, should be separated. Each operating room shall have direct access to the outdoors or exit channel, well-ventilated place should ensure that equipment.
In the laboratory reactor installed reactor lid, the body should be to prevent the reactorvessel and reactor vessel lid sealing surface between each bump. Cover the reactorvessel at a fixed location on the kettle body carefully, tighten the main nut, must bediagonal, symmetric and gradually tighten in multiple places. Forced to be uniform,does not allow the reactor vessel cap tilted to one side, in order to achieve a good seal.
Laboratory reactor connected at the positive and negative nuts, except for the positive and negative rotating nut, two circular rotating relative to the sealing surfacemay not all parts are connected nut assembly lines should be painted oil. Needle valve sealing system line, just gently turn the needle valve, pressure tight cover, you can achieve a good seal. Hand drive action on the high-pressure magnetic rotaryreactor, check operation is flexible.
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Keywords: reactor, heat exchanger, pressure vessel
A small laboratory reactor placed in the room. More than one reactor in the equipment, should be separated. Each operating room shall have direct access to the outdoors or exit channel, well-ventilated place should ensure that equipment.
In the laboratory reactor installed reactor lid, the body should be to prevent the reactorvessel and reactor vessel lid sealing surface between each bump. Cover the reactorvessel at a fixed location on the kettle body carefully, tighten the main nut, must bediagonal, symmetric and gradually tighten in multiple places. Forced to be uniform,does not allow the reactor vessel cap tilted to one side, in order to achieve a good seal.
Laboratory reactor connected at the positive and negative nuts, except for the positive and negative rotating nut, two circular rotating relative to the sealing surfacemay not all parts are connected nut assembly lines should be painted oil. Needle valve sealing system line, just gently turn the needle valve, pressure tight cover, you can achieve a good seal. Hand drive action on the high-pressure magnetic rotaryreactor, check operation is flexible.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月23日星期五
Laboratory reactor vessel material
Laboratory reactor vessel material
Laboratory reactor is currently the high temperature, high pressure chemical reactiondevice is ideal, especially for flammable, explosive, toxic chemical reaction media, and more to show its superiority.
Laboratory reactor vessel material used mainly 1cr18Ni10Ti stainless steel, andtitanium produced according to requirements of different media (TA2), Ni (Ni6) and composite steel plate, kettle structure with flat lid, convex, and with a manhole coverclosed type reactor body, reactor cover openings can be designed according to user requirements.
Laboratory reactor mediums completely sealed from the reactor body and cover body composition seal cavity, completely solved the packing seal and mechanical seal for dynamic seal caused the leak can not be overcome, so that absolutely noleaks and the reaction medium pollution.
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Keywords: reactor, heat exchanger, pressure vessel
Laboratory reactor is currently the high temperature, high pressure chemical reactiondevice is ideal, especially for flammable, explosive, toxic chemical reaction media, and more to show its superiority.
Laboratory reactor vessel material used mainly 1cr18Ni10Ti stainless steel, andtitanium produced according to requirements of different media (TA2), Ni (Ni6) and composite steel plate, kettle structure with flat lid, convex, and with a manhole coverclosed type reactor body, reactor cover openings can be designed according to user requirements.
Laboratory reactor mediums completely sealed from the reactor body and cover body composition seal cavity, completely solved the packing seal and mechanical seal for dynamic seal caused the leak can not be overcome, so that absolutely noleaks and the reaction medium pollution.
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Tightness test pressure vessel requirements
Tightness test pressure vessel requirements
1. Tightness test pressure vessel requirements of medium to extreme toxicity, a high degree of hazard or design does not allow micro-leakage of pressure vessels, air tightness test must be carried out.
2. Tightness test pressure vessel requirements of air-tightness test after passing the test should be conducted in the hydraulic. Design requirements for the design air pressure test of pressure vessels, the need to do the leak test should be specified ondesign drawings.
3. Tightness test pressure vessel requirements of carbon steel and low alloy steelpressure vessels, gas temperature of the test should not be less than 5 ℃; other materials, pressure vessels according to the provisions of the design drawings.
4. Pressure vessels for air tightness test, safety accessories should be installedcomplete.
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Keywords: reactor, heat exchanger, pressure vessel
1. Tightness test pressure vessel requirements of medium to extreme toxicity, a high degree of hazard or design does not allow micro-leakage of pressure vessels, air tightness test must be carried out.
2. Tightness test pressure vessel requirements of air-tightness test after passing the test should be conducted in the hydraulic. Design requirements for the design air pressure test of pressure vessels, the need to do the leak test should be specified ondesign drawings.
3. Tightness test pressure vessel requirements of carbon steel and low alloy steelpressure vessels, gas temperature of the test should not be less than 5 ℃; other materials, pressure vessels according to the provisions of the design drawings.
4. Pressure vessels for air tightness test, safety accessories should be installedcomplete.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月22日星期四
Low pressure steel pressure vessel problem
Low pressure steel pressure vessel problem
1 pressure vessel steel low voltage test pressure to take 1.25P and P 0.1 in both the larger value.
2. Steel pressure vessels for low pressure not by strength calculation formula to determine the wall thickness of pressure vessels (such as stability and other factorsto consider design), should increase the pressure test pressure.
3. Steel pressure vessel design low temperature (wall temperature) is greater than orequal to 200 ℃ greater than or equal to 150 ℃ steel non-ferrous metals pressure vessels, pressure test pressure P calculated as follows:
1 = PT • [σ] / [σ] t = η • P • [σ] / [σ] t
Where: P-pressure vessel design pressure, MPa (in the pressure vessel for themaximum working pressure);
PT - design temperature pressure test under pressure, MPa;
PT-test temperature pressure test under pressure, MPa;
η-pressure test the pressure coefficient (Table 5-1);
[σ] - test temperature the material allowable stress, MPa;
[σ] t - temperature of the material design allowable stress, MPa;
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Keywords: reactor, heat exchanger, pressure vessel
1 pressure vessel steel low voltage test pressure to take 1.25P and P 0.1 in both the larger value.
2. Steel pressure vessels for low pressure not by strength calculation formula to determine the wall thickness of pressure vessels (such as stability and other factorsto consider design), should increase the pressure test pressure.
3. Steel pressure vessel design low temperature (wall temperature) is greater than orequal to 200 ℃ greater than or equal to 150 ℃ steel non-ferrous metals pressure vessels, pressure test pressure P calculated as follows:
1 = PT • [σ] / [σ] t = η • P • [σ] / [σ] t
Where: P-pressure vessel design pressure, MPa (in the pressure vessel for themaximum working pressure);
PT - design temperature pressure test under pressure, MPa;
PT-test temperature pressure test under pressure, MPa;
η-pressure test the pressure coefficient (Table 5-1);
[σ] - test temperature the material allowable stress, MPa;
[σ] t - temperature of the material design allowable stress, MPa;
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Keywords: reactor, heat exchanger, pressure vessel
Shell and tube heat exchanger fluid flow
Shell and tube heat exchanger fluid flow
Shell and tube heat exchangers work, a fluid within the tube, known as the tube,another fluid outside the tube (shell), a fluid within the tube, known as the tube,another fluid outside the tube (shell), a fluid within the tube called the shell. Control the flow of fluid from the tubes at one end the other end of time, known as a process;-tubeheat exchanger, known as the shell. Control the flow of fluid from the tubes at one endthe other end of time, known as a process;
The U-tube heat exchangers, tube-shaped fluid from the tubes at one end through the other side of a curved section of the flow, called the two-way. Two-way more than you need to board the tube body from the U-shaped tubes at one end through the other side of a curved section of the flow, called the two-way process set points to achieve the sub-partition process, commonly used is a single tube, two-way and four-way.Arrangement of sub-processes shown in Table 5-3. Shell with a single shell and double shell are two commonly used is a single shell, shell-shell sub-process can beset by the vertical baffle to achieve.
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Keywords: reactor, heat exchanger, pressure vessel
Shell and tube heat exchangers work, a fluid within the tube, known as the tube,another fluid outside the tube (shell), a fluid within the tube, known as the tube,another fluid outside the tube (shell), a fluid within the tube called the shell. Control the flow of fluid from the tubes at one end the other end of time, known as a process;-tubeheat exchanger, known as the shell. Control the flow of fluid from the tubes at one endthe other end of time, known as a process;
The U-tube heat exchangers, tube-shaped fluid from the tubes at one end through the other side of a curved section of the flow, called the two-way. Two-way more than you need to board the tube body from the U-shaped tubes at one end through the other side of a curved section of the flow, called the two-way process set points to achieve the sub-partition process, commonly used is a single tube, two-way and four-way.Arrangement of sub-processes shown in Table 5-3. Shell with a single shell and double shell are two commonly used is a single shell, shell-shell sub-process can beset by the vertical baffle to achieve.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月21日星期三
Floating head heat exchanger
Floating head heat exchanger
Floating head heat exchanger tube plate at one end is fixed, rigid connection with the shell, the other end of the tube sheet is active, the end of the floating head heat exchanger tube plate is fixed, rigid connection with the shell, the other end of the tube plate is active between the shell and is not connected, as shown. Activities referred to as floating head tube sheet side, between the floating head is not connected to the concrete structure.
Floating head heat exchanger tubes can be withdrawn from the shell, so the tubewall for easy cleaning, tube bundle in shell in free expansion, so no thermal stress; but the complex structure, high cost, floating head office will result in two if Mifengbuyankinds of fluid mixed and difficult to detect. Floating head heat exchanger for a largertemperature difference between hot and cold fluids, dielectric constant need to be cleaned easily scaling the occasion. Used in various types of chemical production inshell and tube heat exchanger in the floating head up.
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Keywords: reactor, heat exchanger, pressure vessel
Floating head heat exchanger tube plate at one end is fixed, rigid connection with the shell, the other end of the tube sheet is active, the end of the floating head heat exchanger tube plate is fixed, rigid connection with the shell, the other end of the tube plate is active between the shell and is not connected, as shown. Activities referred to as floating head tube sheet side, between the floating head is not connected to the concrete structure.
Floating head heat exchanger tubes can be withdrawn from the shell, so the tubewall for easy cleaning, tube bundle in shell in free expansion, so no thermal stress; but the complex structure, high cost, floating head office will result in two if Mifengbuyankinds of fluid mixed and difficult to detect. Floating head heat exchanger for a largertemperature difference between hot and cold fluids, dielectric constant need to be cleaned easily scaling the occasion. Used in various types of chemical production inshell and tube heat exchanger in the floating head up.
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Keywords: reactor, heat exchanger, pressure vessel
Pressure vessel welded joints requires
Pressure vessel welded joints requires the choice of testing methods
1. Pressure vessel wall thickness of 38mm or less, its butt weld butt joints should be used in ray detection; due to structural and other reasons, does not use radiationdetection may make use of ultrasonic testing. 540MPa tensile strength greater than or equal to the standard material, and the shell thickness greater than 20mm of steelpressure vessels, each butt weld butt joints in addition to radiographic inspection, should increase the local ultrasonic flaw detection;
2. Pressure vessel wall thickness greater than 38mm. The butt weld butt joints, such as the selection ray detection, the weld should be part of each ultrasonic flaw detection; such as choice of ultrasonic testing, the weld should be part of each ray detection, which should include all T-joints ;
3. Requires testing of the corner joints, T-connector, not the ray or ultrasonic testing, should be surface inspection;
4. Non-ferrous metal pressure vessel butt weld butt joints should be used in radiationdetection.
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Keywords: reactor, heat exchanger, pressure vessel
1. Pressure vessel wall thickness of 38mm or less, its butt weld butt joints should be used in ray detection; due to structural and other reasons, does not use radiationdetection may make use of ultrasonic testing. 540MPa tensile strength greater than or equal to the standard material, and the shell thickness greater than 20mm of steelpressure vessels, each butt weld butt joints in addition to radiographic inspection, should increase the local ultrasonic flaw detection;
2. Pressure vessel wall thickness greater than 38mm. The butt weld butt joints, such as the selection ray detection, the weld should be part of each ultrasonic flaw detection; such as choice of ultrasonic testing, the weld should be part of each ray detection, which should include all T-joints ;
3. Requires testing of the corner joints, T-connector, not the ray or ultrasonic testing, should be surface inspection;
4. Non-ferrous metal pressure vessel butt weld butt joints should be used in radiationdetection.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月20日星期二
Metal Pressure Vessel Requirements
Stainless steel and nonferrous metal pressure vessel requirements
1. Pressure vessels and pressure components of non-ferrous metal manufacturing,shall meet the requirements of this order, we must also meet the special technical requirements or the requirements of the design drawings;
2. Stainless steel and nonferrous metal pressure vessel must have a special requestor a dedicated manufacturing plant site, not with the black metal mixed with other products or production. To keep the workplace clean, dry, and strictly control dust.Forming and welding, should meet the needs of special tooling and equipment;
3. Stainless steel and nonferrous metal pressure vessel requirements must controlsurface mechanical damage and splashes;
4. Stainless steel and nonferrous metal pressure vessel requirements generallyshould be gas shielded arc welding.
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Keywords: reactor, heat exchanger, pressure vessel
1. Pressure vessels and pressure components of non-ferrous metal manufacturing,shall meet the requirements of this order, we must also meet the special technical requirements or the requirements of the design drawings;
2. Stainless steel and nonferrous metal pressure vessel must have a special requestor a dedicated manufacturing plant site, not with the black metal mixed with other products or production. To keep the workplace clean, dry, and strictly control dust.Forming and welding, should meet the needs of special tooling and equipment;
3. Stainless steel and nonferrous metal pressure vessel requirements must controlsurface mechanical damage and splashes;
4. Stainless steel and nonferrous metal pressure vessel requirements generallyshould be gas shielded arc welding.
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Keywords: reactor, heat exchanger, pressure vessel
The development of heat exchangers
The development of heat exchangers
With the development of production technology, the scope of application of variousheat exchangers are constantly developing the application of various heat exchangers are constantly developing. Such as heat exchangers for high temperature and pressure of the scope of application are constantly developing the heat transfer process, it was mainly used simple structure of the flexible pipe or tube heat exchanger.
However, due to the heat exchanger fluid handling capacity is small, prices high, can not meet the needs of modern large-scale installations, so as the structural materialand manufacturing process development, shell and tube heat exchanger is togradually extend to the application of high temperature and pressure of the occasion,this heat exchanger in foreign countries, the maximum working pressure of 84MPa,temperature of 1000 ℃.
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Sources from The development of heat exchangers
Keywords: reactor, heat exchanger, pressure vessel
With the development of production technology, the scope of application of variousheat exchangers are constantly developing the application of various heat exchangers are constantly developing. Such as heat exchangers for high temperature and pressure of the scope of application are constantly developing the heat transfer process, it was mainly used simple structure of the flexible pipe or tube heat exchanger.
However, due to the heat exchanger fluid handling capacity is small, prices high, can not meet the needs of modern large-scale installations, so as the structural materialand manufacturing process development, shell and tube heat exchanger is togradually extend to the application of high temperature and pressure of the occasion,this heat exchanger in foreign countries, the maximum working pressure of 84MPa,temperature of 1000 ℃.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月16日星期五
Stainless steel reactor main components
Stainless steel reactor main components of the device
Stainless steel reactor supporting a number of functional magnetic stirrerreactor, Weihai Chemical Machinery Co., Ltd. Universal stainless steel tube reactorto make up a number of irrational rotation around the light source and multi-tubemechanical rotation of the drawbacks of poor performance can be achieved at the same time, some inflatable tube function, multi-tube magnetic stirrer reactorperformance real practical value!
As the user due to the production process, operating conditions vary, the stainless steel reactor lid opening process, mixing pattern (with paddle, anchor type, frametype, spiral type, etc.), bearing type (type bearings suspended or supported ) andpacking devices, different requirements, contact the factory with a separate design.
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Sources from Stainless steel reactor main components
Keywords: reactor, heat exchanger, pressure vessel
Stainless steel reactor supporting a number of functional magnetic stirrerreactor, Weihai Chemical Machinery Co., Ltd. Universal stainless steel tube reactorto make up a number of irrational rotation around the light source and multi-tubemechanical rotation of the drawbacks of poor performance can be achieved at the same time, some inflatable tube function, multi-tube magnetic stirrer reactorperformance real practical value!
As the user due to the production process, operating conditions vary, the stainless steel reactor lid opening process, mixing pattern (with paddle, anchor type, frametype, spiral type, etc.), bearing type (type bearings suspended or supported ) andpacking devices, different requirements, contact the factory with a separate design.
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Keywords: reactor, heat exchanger, pressure vessel
Steel pressure vessel weld heat treatment
Steel pressure vessel weld heat treatment
(1) pressure vessel steel weld heat treatment after the heat treatment should be usedas a whole. Like to take sub-heat treatment, heat treatment of their overlapping length should be not less than 1500mm. Outer part of the furnace insulation measuresshould be taken.
(2) steel pressure vessel weld heat treatment girth welds and repaired welds,allowing the use of local heat treatment. Local heat treatment of the weld, to includethe entire weld. Heat weld width on each side of not less than twice the thickness ofthe shell name; near the heated parts of the shell insulation measures should be taken.
(3) pressure vessel steel weld heat treatment should be ended and all the welding work experience received after passing the pressure test before.
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Sources from Steel pressure vessel weld heat treatment
Keywords: reactor, heat exchanger, pressure vessel
(1) pressure vessel steel weld heat treatment after the heat treatment should be usedas a whole. Like to take sub-heat treatment, heat treatment of their overlapping length should be not less than 1500mm. Outer part of the furnace insulation measuresshould be taken.
(2) steel pressure vessel weld heat treatment girth welds and repaired welds,allowing the use of local heat treatment. Local heat treatment of the weld, to includethe entire weld. Heat weld width on each side of not less than twice the thickness ofthe shell name; near the heated parts of the shell insulation measures should be taken.
(3) pressure vessel steel weld heat treatment should be ended and all the welding work experience received after passing the pressure test before.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月15日星期四
Heat exchanger splicing
Heat exchanger splicing, should meet the following requirements:
a, butt joint welding process should be assessed. Number of specimen number, size, test methods according to the provisions of JB 4708; aluminum, copper, titanium welded joints or the reference implementation;
b, with a heat exchanger tube butt weld, not more than one straight; U-shaped tube not more than two; the shortest tube length not less than 300mm; including at least 50mm of straight pipe U-bend pipe welding splicing within the prohibited joints;
c, groove pipe end should be processed by mechanical methods, should be cleaned before welding;
d, corresponding amount of the wrong side of the wall thickness should not exceed 15% of tubes, and not greater than 0.5mm; straightness deviation will not affect the smooth tube wear limit;
e, the table should be selected after docking the diameter of the welding head to pass the ball checks to the ball by qualified;
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Sources from Heat exchanger splicing
Keywords: reactor, heat exchanger, pressure vessel
a, butt joint welding process should be assessed. Number of specimen number, size, test methods according to the provisions of JB 4708; aluminum, copper, titanium welded joints or the reference implementation;
b, with a heat exchanger tube butt weld, not more than one straight; U-shaped tube not more than two; the shortest tube length not less than 300mm; including at least 50mm of straight pipe U-bend pipe welding splicing within the prohibited joints;
c, groove pipe end should be processed by mechanical methods, should be cleaned before welding;
d, corresponding amount of the wrong side of the wall thickness should not exceed 15% of tubes, and not greater than 0.5mm; straightness deviation will not affect the smooth tube wear limit;
e, the table should be selected after docking the diameter of the welding head to pass the ball checks to the ball by qualified;
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Pressure Vessel Weld Undercut
The surface pressure vessel weld undercut weld surface quality:
(1) pressure vessel weld surface quality of the weld surface undercut the standardtensile strength greater than 540MPa steel and Cr-Mo low alloy steel pressure vessel, made of austenitic stainless steel pressure vessels, cryogenic pressure vessels , spherical pressure vessels and weld factor of 1.0, pressure vessel, the weldsurface may not have undercut;
(2) above (1) outside the pressure vessel weld surface of the undercut depth of notmore than 0.5mm, undercut shall not exceed a continuous length of 100mm, total length of weld undercut on both sides of the weld length shall not exceed 10%;
(3) non-ferrous metal pressure vessel weld undercut surface shall meet thestandards.
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Keywords: reactor, heat exchanger, pressure vessel
(1) pressure vessel weld surface quality of the weld surface undercut the standardtensile strength greater than 540MPa steel and Cr-Mo low alloy steel pressure vessel, made of austenitic stainless steel pressure vessels, cryogenic pressure vessels , spherical pressure vessels and weld factor of 1.0, pressure vessel, the weldsurface may not have undercut;
(2) above (1) outside the pressure vessel weld surface of the undercut depth of notmore than 0.5mm, undercut shall not exceed a continuous length of 100mm, total length of weld undercut on both sides of the weld length shall not exceed 10%;
(3) non-ferrous metal pressure vessel weld undercut surface shall meet thestandards.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月14日星期三
Pressure vessel for inspection holes
Pressure vessel for inspection holes (except heat) requirements
1. Pressure vessel shall have the inspection hole. Check the hole, includingmanholes, hand holes, threaded pipe plug inspection hole.
2. Than or equal to 1000mm diameter pressure vessel, shall be open at least onehole; pressure vessel inner diameter greater than or equal less than 500mm ~1000mm, should be open a hole or two hand holes; pressure vessel diameter lessthan or equal to 300mm ~ 500mm, should be set up at least two hand holes.
3. Circular manhole diameter shall be not less than 400mm, oval-shaped peopleshould not be less than the pore size 400 × 300mm; round hand hole diameter should be not less than 100mm, oval hand hole size should be not less than 75 × 50mm.
4. The pressure vessel has a removable head (cover and the like), or other cover toswitch, where people can play the role of hole or hand hole, can no longer set themanhole or hand hole. But its size, should not be less than the replaced provisionsmanhole or hand hole size.
5. Such as pressure vessels set on threaded pipe plug inspection hole (Note 3), you can not set the hand hole. Threaded pipe plug shall not be less than the nominaldiameter of 50mm.
6. Check the location of the hole opening should be reasonable, appropriate, easy to clean interior. Hand hole or threaded pipe plug inspection hole should be closedwere opened at both ends of the head or near the cylinder head on.
7. Spherical pressure vessel of the manhole should be located in the very belt.
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Keywords: reactor, heat exchanger, pressure vessel
1. Pressure vessel shall have the inspection hole. Check the hole, includingmanholes, hand holes, threaded pipe plug inspection hole.
2. Than or equal to 1000mm diameter pressure vessel, shall be open at least onehole; pressure vessel inner diameter greater than or equal less than 500mm ~1000mm, should be open a hole or two hand holes; pressure vessel diameter lessthan or equal to 300mm ~ 500mm, should be set up at least two hand holes.
3. Circular manhole diameter shall be not less than 400mm, oval-shaped peopleshould not be less than the pore size 400 × 300mm; round hand hole diameter should be not less than 100mm, oval hand hole size should be not less than 75 × 50mm.
4. The pressure vessel has a removable head (cover and the like), or other cover toswitch, where people can play the role of hole or hand hole, can no longer set themanhole or hand hole. But its size, should not be less than the replaced provisionsmanhole or hand hole size.
5. Such as pressure vessels set on threaded pipe plug inspection hole (Note 3), you can not set the hand hole. Threaded pipe plug shall not be less than the nominaldiameter of 50mm.
6. Check the location of the hole opening should be reasonable, appropriate, easy to clean interior. Hand hole or threaded pipe plug inspection hole should be closedwere opened at both ends of the head or near the cylinder head on.
7. Spherical pressure vessel of the manhole should be located in the very belt.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月9日星期五
Double glass reactor malfunction exclusion
Double glass reactor malfunction simple exclusion
1 Open the double glass reactor power switch, indicator light does not shine. External power supply or bad, please do not pass the professional electrician check thepower outlet.
2 fuse circuit, the double glass reactor power switch in the OFF position, and back toset fuses.
3 double glass reactor power indicator light, but does not rotate. Axis of rotation ruststop using, contact the vendor motor, electrical box is not connected seven-pin plugfailure to reconnect seven-pin plug
4 double-layer vacuum glass reactor suddenly disappeared, there are cracks in the glass, the switch checks the glass parts are damaged, transfer switch
5 double glass reactor with a vacuum, but not on the pumping ring wear, leaks, replace the connecting ring vacuum switch, switch
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Sources from Double glass reactor malfunction exclusion
Keywords: reactor, heat exchanger, pressure vessel
1 Open the double glass reactor power switch, indicator light does not shine. External power supply or bad, please do not pass the professional electrician check thepower outlet.
2 fuse circuit, the double glass reactor power switch in the OFF position, and back toset fuses.
3 double glass reactor power indicator light, but does not rotate. Axis of rotation ruststop using, contact the vendor motor, electrical box is not connected seven-pin plugfailure to reconnect seven-pin plug
4 double-layer vacuum glass reactor suddenly disappeared, there are cracks in the glass, the switch checks the glass parts are damaged, transfer switch
5 double glass reactor with a vacuum, but not on the pumping ring wear, leaks, replace the connecting ring vacuum switch, switch
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Keywords: reactor, heat exchanger, pressure vessel
Heat exchanger tube bundle problem
Heat exchanger tube bundle problem
The heat exchanger baffles, fixed rods, tube plates, and floating head cover, etc.,should be visually inspected to confirm the availability of corrosion and deformation,check the gasket for damage or aging. Check the heat exchanger tube plate and thehead without distortion.
The heat exchanger tube bundle thickness measurement is to check one of the basic content. The results of previous thickness measurements should be recorded forcomparison and trend analysis. An outer tube of the fin thickness depends on a dedicated ultrasonic thickness measurement probe or eddy current probe from thetube for testing. Sometimes, you can also use the sampling approach to treatment.
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Keywords: reactor, heat exchanger, pressure vessel
The heat exchanger baffles, fixed rods, tube plates, and floating head cover, etc.,should be visually inspected to confirm the availability of corrosion and deformation,check the gasket for damage or aging. Check the heat exchanger tube plate and thehead without distortion.
The heat exchanger tube bundle thickness measurement is to check one of the basic content. The results of previous thickness measurements should be recorded forcomparison and trend analysis. An outer tube of the fin thickness depends on a dedicated ultrasonic thickness measurement probe or eddy current probe from thetube for testing. Sometimes, you can also use the sampling approach to treatment.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月8日星期四
Guidebooks double glass reactor
Guidebooks double glass reactor
1, double glass reactor with a carefully before examination, and whether there isbroken glass, the interface is consistent, attention gently.
2, double glass reactor with a soft cloth (napkin available alternative) to clean theinterface, and then smear a little vacuum grease. (Vacuum grease after use must becovered to prevent dust sand to enter.)
3, the interface is not over-tighten, loosen regularly active, cause the connector to avoid long-term locked killed.
4, first open the power switch, and then let the double glass reactor from slow to fastrunning, shutdown the machine is stopped to make, and then switch off.
5, double glazing throughout PTFE reactor had to tighten the switch can not be easy to damage the glass.
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Keywords: reactor, heat exchanger, pressure vessel
1, double glass reactor with a carefully before examination, and whether there isbroken glass, the interface is consistent, attention gently.
2, double glass reactor with a soft cloth (napkin available alternative) to clean theinterface, and then smear a little vacuum grease. (Vacuum grease after use must becovered to prevent dust sand to enter.)
3, the interface is not over-tighten, loosen regularly active, cause the connector to avoid long-term locked killed.
4, first open the power switch, and then let the double glass reactor from slow to fastrunning, shutdown the machine is stopped to make, and then switch off.
5, double glazing throughout PTFE reactor had to tighten the switch can not be easy to damage the glass.
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Keywords: reactor, heat exchanger, pressure vessel
Fiber welding of plate-fin heat exchanger
Fiber welding of plate-fin heat exchanger
Welding of the fiber plate-fin heat exchanger, in addition to a collection box for both sides and weld thickness for surface crack detection, the main vacuum leak through the sides, respectively, to confirm their status. If the pressure test and found a leak,more easily found.
If leakage can be cut either side of the collection box, with another example of fillingpressure method, to identify the specific leak channel, for repairs to provide the correct basis. If the plate-fin heat exchanger is used for air separation plant in the main evaporator, in order to prevent the operation of liquid oxygen in the carbonmaterial should be kept within the plot is usually the oxygen leak channel blocked.Therefore, when conducting the leak. Channel should be inflated in nitrogen, oxygengas tank side of the cut set.
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Sources from Fiber welding of plate-fin heat exchanger
Keywords: reactor, heat exchanger, pressure vessel
Welding of the fiber plate-fin heat exchanger, in addition to a collection box for both sides and weld thickness for surface crack detection, the main vacuum leak through the sides, respectively, to confirm their status. If the pressure test and found a leak,more easily found.
If leakage can be cut either side of the collection box, with another example of fillingpressure method, to identify the specific leak channel, for repairs to provide the correct basis. If the plate-fin heat exchanger is used for air separation plant in the main evaporator, in order to prevent the operation of liquid oxygen in the carbonmaterial should be kept within the plot is usually the oxygen leak channel blocked.Therefore, when conducting the leak. Channel should be inflated in nitrogen, oxygengas tank side of the cut set.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月7日星期三
Operation of the external heat exchanger
Operation of the external heat exchanger inspection
A, heat exchanger base and bearing inspection. The basis of the heat exchangeris generally added by the saddle bearing concrete foundation formed, there are a fewof the heat exchanger are the basis of bearings and steel. On the concrete foundationshould first be visually inspected for cracks, spalling. The site of the suspectedsample can be checked. The heat exchanger shell and the gap between the saddle,should be carefully examined to confirm whether they occurred due to presence ofwater vapor corrosion. The saddle is usually welded with the heat exchanger shell. In this case, you should check the saddle between the anchor bolt hole and foundationbolts if there is room for expansion and contraction, and make sure not to tighten the bolt, one end of the saddle can move freely. Application Level check the concrete foundation subsidence, and visual inspection of the piping is related to the occurrence of distortion. If necessary, can be combined with vertical and horizontalhanging instrument measured way to verify the level of degree.
B, heat exchanger piping inspection. Running in the heat exchanger can beconnected to its external takeover checked for leaks. Operation were found to havesevere leakage nozzle, the suspension should be open connecting flange, replace the gasket, check the flange seals have groove-like damage.
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Sources from Operation of the external heat exchanger
Keywords: reactor, heat exchanger, pressure vessel
A, heat exchanger base and bearing inspection. The basis of the heat exchangeris generally added by the saddle bearing concrete foundation formed, there are a fewof the heat exchanger are the basis of bearings and steel. On the concrete foundationshould first be visually inspected for cracks, spalling. The site of the suspectedsample can be checked. The heat exchanger shell and the gap between the saddle,should be carefully examined to confirm whether they occurred due to presence ofwater vapor corrosion. The saddle is usually welded with the heat exchanger shell. In this case, you should check the saddle between the anchor bolt hole and foundationbolts if there is room for expansion and contraction, and make sure not to tighten the bolt, one end of the saddle can move freely. Application Level check the concrete foundation subsidence, and visual inspection of the piping is related to the occurrence of distortion. If necessary, can be combined with vertical and horizontalhanging instrument measured way to verify the level of degree.
B, heat exchanger piping inspection. Running in the heat exchanger can beconnected to its external takeover checked for leaks. Operation were found to havesevere leakage nozzle, the suspension should be open connecting flange, replace the gasket, check the flange seals have groove-like damage.
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Keywords: reactor, heat exchanger, pressure vessel
2011年12月5日星期一
Heat Exchanger Inspection Program
Heat exchanger inspection program should normally be processes and equipmentmaintenance management operations department in consultation with departmentsto determine. Plant operations department can process operating conditions,material changes in composition and other parameters to determine the overall heat transfer performance of heat changes and confirm the leakage situation.
Equipment maintenance management process operation according to the preliminary findings, combined with past history, the focus of this inspection to determine the content and focus area. Heat exchanger pressure shell, head, pressure vessels belonging to the scope of the inspection so they should first refer to the labordepartment in-service pressure vessel safety supervision requirements made by the technical aspects of security checks.
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Sources from Heat Exchanger Inspection Program
Keywords: reactor, heat exchanger, pressure vessel
Equipment maintenance management process operation according to the preliminary findings, combined with past history, the focus of this inspection to determine the content and focus area. Heat exchanger pressure shell, head, pressure vessels belonging to the scope of the inspection so they should first refer to the labordepartment in-service pressure vessel safety supervision requirements made by the technical aspects of security checks.
...
Sources from Heat Exchanger Inspection Program
Keywords: reactor, heat exchanger, pressure vessel
Reactor operation checks
Reactor operation checks
1 reactor before the operation to prepare the necessary driving tools such aswrenches, pipe wrenches, etc.;
2. checked before reactor operation safety valve, explosion-proof membrane,pressure gauges, thermometers and other safety devices are sensitive good
Use, safety valve, pressure gauge is in the calibration period, and the seals intact, the red line gauge whether the program is correct;
3 reactor operation checks reactor flange and base such as whether the bolts loose,security guard is intact and reliable;
4 reactor operation checks to confirm the device with a blue clamp Dafa no loosening, no small number, no residue, and arranged with a uniform distribution;
5 Confirm reactor operating oil level in sight glass reducer 1 / 2 to 2 / 3 between theautoclave box with a mechanical seal oil ring oil level higher than the static and dynamic sealing surface;
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Sources from Reactor operation checks
Keywords: reactor, heat exchanger, pressure vessel
1 reactor before the operation to prepare the necessary driving tools such aswrenches, pipe wrenches, etc.;
2. checked before reactor operation safety valve, explosion-proof membrane,pressure gauges, thermometers and other safety devices are sensitive good
Use, safety valve, pressure gauge is in the calibration period, and the seals intact, the red line gauge whether the program is correct;
3 reactor operation checks reactor flange and base such as whether the bolts loose,security guard is intact and reliable;
4 reactor operation checks to confirm the device with a blue clamp Dafa no loosening, no small number, no residue, and arranged with a uniform distribution;
5 Confirm reactor operating oil level in sight glass reducer 1 / 2 to 2 / 3 between theautoclave box with a mechanical seal oil ring oil level higher than the static and dynamic sealing surface;
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Keywords: reactor, heat exchanger, pressure vessel
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