The pressure vessel pressure test

The pressure vessel pressure test, pressure test can be selected for hydraulic and pneumatic.

　　Hydrostatic pressure testing of pressure vessels: the hydraulic test pressure shouldrise slowly to reach the required test pressure for 30 minutes, and then the pressure dropped to 80 percent of the required test pressure and maintain long enough for all the welds and joints to be checked. The experimental results with no leakage and no visible residual deformation is qualified.

　　A hydraulic experiment is not suitable for pressure vessels, such as due process requirements, not allowed to have minimal residual liquid in the container, or fluid-filled container due to structural reasons, are allowed to use air pressure experiment.Where a pressure experiment container weld the need for 100% nondestructive testing, and experimental places should be increased security measures, and underthe supervision of the security sector.

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• 　　The pressure vessel welded joints

Parts of the plate heat exchanger assembly

Parts of the plate heat exchanger assembly

　　Parts of the plate heat exchanger assembly factory parts to the use of units shipped,on-site assembly, or use the unit maintenance equipment to open the plate heat exchanger and then assembled, must be carried out in accordance with the following order:

　　Carefully read random file (certificate, card materials, flowcharts, assembly drawingsand packing list, etc.).

　　Check plate to take over, the gasket material is consistent with the medium in theheat exchanger corrosion resistance requirements.

　　Drawings check all parts are complete, model, size is consistent with the drawings.

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• 　　Highly Efficient Heat Exchanger

Common symptoms and causes of reactor

　Common symptoms and causes of reactor

　　A fault phenomenon: the sealing surface leakage. Fault: screw thread loosening;sealing surface damage. Remedy: re-tighten the screw; re-grinding to polishing the sealing surface.

　　2, reactor failure phenomenon: the valve leak. Fault: stem (needle) valve port sealing surface damage. Exclude: maintenance, replacement of the stem (pin), the valve port.

　　3, reactor failure phenomenon: the outer magnet rotating within the magnet does not rotate, the motor current is reduced. Failure reasons: the reactor temperature is too high, the cooling circulation, within the magnet flux due to high temperature fade.Hydrogenation reaction, magnet sets of cracks within the magnet expansion.Remedy: notify the supplier to replace within the magnet. Failure phenomenon: themagnetic coupling actuator noise of friction. The cause of the malfunction: bushings,bearing wear, the gap is too large, rotating magnet appear beating. Remedy:Contact supplier to replace the bearings, bushings.

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• 　　Several of the reactor sealed conditions

Heat exchanger with Large installations

Heat exchanger with the installations of large-scale and large diameter will be more than 5m, the heat transfer area of 10000m2, will be popular compact heat exchanger,shell heat exchanger, the rod baffle heat exchangers, plate-fin heat exchanger, plateair cooler will be developed, vibration losses will gradually overcome, high temperature, high pressure, safe, reliable heat exchanger structure towards a simple structure, easy fabrication, light weight. With tensions in the global water, recycled water will be replaced by a new cooling medium circulation device will be replaced bynew, more efficient air cooler. The development of thermal insulation so that heat losswill be reduced to below 50%.

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• 　　Types of plate heat exchanger

Level gauge - pressure vessels

Level gauge, pressure vessels shall comply with the provisions of the relevantstandard, and shall meet the following requirements:

　　A. Media should be based on the pressure vessel, the maximum working pressureand temperature of the correct selection;

　　Two. Before installing and using low pressure vessel level gauge, hydrostatic testshould be the total nominal pressure of 1.5 times the surface; level gauge, high-pressure container with the surface meter of 1.25 times nominal pressure hydrostatic test should be carried out ;

　　3. Antifrost liquid level meter should be used in pressure vessels on the mediacontaining 0 ℃;

　　4. Outdoor use of the cold regions of the level gauge should be used in the folderlevel gauge of the dwelling or insulation structure;

　　5 For flammable, toxic level of extreme and highly hazardous liquefied gas mediumpressure vessel plate or automatic level gauge should be used, and should preventleakage protection device;

　　6. Stable liquid level indication should not float (standard) level gauge.

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• 　　Pressure vessel pressure gauge Caution

Reactor impact resistance

Reactor impact resistance: the smaller the internal stress of the glass layer, the better the flexibility, the greater the hardness, the higher the bending strength, impact resistance, the better. I plant the glass layer within the required thickness with a diameter of 30mm, weight 112g steel ball impact, the impact energy of 282 × 10-3Jsuperior product index of 260 x 10-3J)

　　(Structure reactor composition of the kettle, kettle lid, jacket, agitator, gear, shaft sealdevice support, etc.. Mixing are generally in the form of anchor, paddle, turbine-propelled or box type, stirring device height to diameter is relatively large, availablemulti-layer mixing blades can also be based on user requests any optional settingsjacket outside the reactor wall, or set up inside the heat exchanger surface, but alsothrough the outer loop change heat.

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• 　　The reactor pressure electricity

Installation of Pressure Vessel Gauge

The installation of the pressure vessel pressure gauge

　　The pressure vessel installed location should be easy inspection and cleaning of theoperating personnel, and should be avoided by the radiant heat, freezing, or adverseeffects of vibration;

　　Between the pressure gauge and pressure vessel shall be equipped with three cocksor needle valve; three cocks or needle valve should be open on the tags and locking devices; between the pressure gauge and pressure vessels shall not connect anyother purpose accessories or over;

　　For water vapor medium pressure gauge, pressure gauge and pressure vesselsshould be equipped with water in bends;

　　Used with corrosive or highly viscous media, pressure gauge, pressure gauge andpressure vessels shall be equipped with isolation medium buffer.

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• 　　Pressure Vessel Safety Valve Installation II

Types of plate heat exchanger

Types of plate heat exchanger is more and more, technology is getting better and better performance, and an increasingly wide range of applications.

　　Types of plate heat exchanger:

　　From the plate heat exchanger connection point of view: from the detachable plate heat exchanger the brazed plate heat exchanger. From semi-welded, all-welded tothe plate and shell heat exchanger.

　　From the plate in the form of point of view: from symmetric to asymmetric.

　　From the point of view of the flow channel of the heat exchanger plate: from thesymmetrical flow channel to the width of the flow channel, wide flow channel.

　　From the depth of the plate corrugated: deep 3 ~ 5mm general board developmentfrom wave to wave deep 2 ~ 2.5mm shallow dense corrugated board.

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• 　　Heat Exchanger Plate for Corrosion Reasons

The reactor pressure electricity

The reactor operating temperature: glass-lined equipment, heating and coolingshould be slow. I plant manufacturing glass-lined equipment temperature is -20-200 °C temperature acute degeneration of ≥ 200 ° C.

　　Ceramic layer thickness: glass equipment, the ceramic layer thickness 0.8-2.3mm,the thickness of the ceramic layer of glass-lined equipment annex 0.6-1.8mm.

　　The reactor pressure electricity: glass-lined with good insulation, glass-lined withinthe specified thickness 20KV high-frequency spark check the ceramic layer, high-frequency spark breakdown porcelain layer.

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• 　　Types of Sealed Stainless Steel Reactor

Heat Exchanger Plate for Corrosion Reasons

　The heat exchanger plate for corrosion failure type

　　Heat exchanger to stress corrosion cracking: the metal caused by the cathodicdissolution process under the combined effect of static tensile stress and electrochemical media, local corrosion cracking or fracture. Pressing plate willproduce a residual internal stress, with the halide ions in the media (such as Cl -, F -ions) or H2S exposure may cause stress corrosion cracking;

　　Heat exchanger to intergranular corrosion: the origin at the surface of the metal along grain boundaries deep into the internal corrosion that can lead to loss of binding force between the grains, so that the strength of the material greatly reduced.Example, stainless steel corrosion in allergic temperature range (400 ° C to 600 ° C);

　　Heat exchanger uniform corrosion: metal surface contact with the medium all or most of the corrosion phenomenon. For example, the plate improper selection, or use oflong, more than the allowable life of;

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• 　　Both ends of the platen of the heat exchanger

Use of Electric Heating of the Reactor II

　　Driving and use of electric heating of the reactor

　　4, the reactor is adding solid materials should be careful to prevent bumps the pot wall; dangerous media reactor non-metal or hard objects fall into the filling inside. Of liquid materials, vacuum pumping material, the vacuum valve should be opened slowly to prevent the red material.

　　5, liquid materials, vacuum pumping material, the vacuum valve should be opened slowly to prevent the red material.

　　6, the reactor closed reaction should always keep the pot outside pressure,temperature and other parameters, the abnormal situation in a timely manner to prevent fatal accidents;

　　7, is strictly prohibited instantaneous change of reaction temperature, and hit the potitself is strictly prohibited;

　　8 in a timely manner the operating records of the reactor equipment;

　　9, usually do the repairs, maintenance, and records.

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• 　　Use of Electrically Heated Reactor

Pressure Vessel Pressure Test

　One of the following situations the pressure vessel, internal and external inspectionmust pressure test:

　　A. Repair or replacement of major pressure parts welding method;

　　Two. Change the conditions of use and more than the original design parameters;

　　3. Replace the lining before the re-lining;

　　4. Stop using it for two years to re-multiplexing

　　5 Newly installed or removed the pressure vessel equipment;

　　6. Unable to conduct an internal inspection;

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• 　　Pressure Vessel Internal Inspection

Welding method of the pressure vessel

　Welding method of the pressure vessel repair or technological innovation, and shall comply with the following requirements:

　　A. Pressure vessel welding, Patching, the replacement of the tube section and theheat treatment and other technical requirements, should refer to the specification ofthe corresponding manufacturing technology, the development of the constructionprogram and meet the quality requirements, the welding process should be agreed toby the person in charge of review of the welding technology.

　　Two. Removed, the defect should be generally 20d2 surface inspection to confirm thedefect has been completely eliminated. After completion of welding work to donondestructive testing, to confirm the repair parts meet quality requirements.

　　3. Base metal surfacing repair parts must be polished. The length of the repair welddefects cleared should not be less than 100mm.

　　4. The pressure vessel heat treatment requirements, and should re-do the heat treatment in repair welding.

　　5 Pressure parts shall not be used to supplement the repair.

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• 　　The medium in the pressure vessel

Toreplace the Shell and Tube Heat Exchanger

　With the development of new structures of the all-welded, brazed, lamella plate heat exchanger, as well as new technologies, new processes, new materials in the plate heat exchanger, plate heat exchanger in the further development of their own transfer coefficienthigh, the logarithmic mean temperature difference is large, small footprint, light weight, low-price end of the small temperature difference and dirt and lowcoefficient of superiority will be its ability to pressure from 2.5MPa to 8.0MPa,temperature capabilitiesincreased from 150 ° C to 10 ° C to create the conditions toreplace the shell and tube heat exchanger, and its many applications.

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• 　　Working Principle of the Plate Heat Exchanger

Use of Electrically Heated Reactor

　Driving and the use of electrically heated reactor:

　　1, power, motor driven stirring run, and observe whether the anomaly, the soundreducer and mixing transmission parts;

　　2, all material inputs electrically heated reactor, including the time, sequence, speed, variety, quantity, and heating, cooling, insulation and so must be the technical operation.

　　3, the bulk material inputs required large piece of material processed into smallpieces, put into. First hand drive action before the open reactor mixing, and thenpress the power switch point move, as the operate normally before it is start mixingoperation. Forced to start is strictly prohibited. To prevent the bulk material stuck or collision thermometer tube causing the accident.

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• 　　Steel lined the ETFE stainless steel reactor

Fluid Connectors indirect heat exchanger

　Fluid Connectors indirect heat exchanger

　　Indirect heat exchanger fluid connector, linking the two surface heat exchanger by theheat carrier in which the cycle heat exchanger, the heat carrier in the high temperature fluid heat exchanger and the low-temperature fluid circulation,acceptance in the high temperature fluid heat, at low temperature fluid heat exchanger, heat is released to the cryogenic fluid.

　　Direct-contact heat exchanger

　　Direct contact heat exchanger the two fluids in direct contact heat transfer equipment,such as cooling towers, gas condenser.

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• 　　Surface heat exchanger

Type and Purpose of the Reactor

Small experimental atmospheric pressure / autoclave reactor.Reactor Scope:suitable for high speed, low-speed, low-viscosity material mixing. Is an ideal devicefor testing of various chemical reactions.This equipment is designed for laboratories,universities and small-scale production design and manufacture of the reactor.

　　Unsaturated polyester resin complete set of equipment, the type and purpose of the reactor, the type of reactor mentioned earlier, the meaning of the reactor: the broad understanding of the reactor that has a physical or chemical reaction of the stainless steel container, container structure design and parameters configuration to achievethe technical requirements of the heating, evaporation, cooling and low-speed mixedfunction.

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• 　　Reactor Respective Performance

Daily inspection of pressure vessels

　Daily inspection of pressure vessels

　　A pressure vessel Appearance check: check whether the surface of the containercracks, craters, deformation, corrosion points; instrument interface, sealing pointsleaks;

　　2, run whether there is abnormal;

　　3, the secure attachment of the pressure vessel is intact;

　　4, the working pressure, medium temperature exceeds the specified value

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• 　　Pressure vessel design temperature