Plate heat exchanger technology developments:
Anti-corrosion technology. This year, countries in the field of heat exchanger corrosion research and design has also made a more significant results, such as anodic protection technology development and application of new materials, corrosion is a type of heat exchanger so as to bring the development of the infinite of life. In addition, the application of non-metallic materials, heat transfer is greatly enhanced corrosion resistance.
Both large and miniaturization. With the large-scale sets of devices, heat exchangers the direction of the large-scale development, and in microelectronics, aerospace, medical, chemical and biological engineering, materials science and other occasions of special requirements to the miniaturization.
To strengthen the technology. Variety of new, highly efficient heat exchanger gradually replace the existing conventional products. Plant dynamic effect of enhanced heat transfer technology, additive enhancement of boiling heat transfer technology, through the enhancement of heat transfer into the inert gas technology, dropwise condensation technique, micro-heat transfer technology, the magnetic field power heat transfer technology, nano technology, heat transfer fluid will be research and development.
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Sources from Developments of Heat Exchanger
Keywords: reactor，pressure vessel，heat exchanger
2011年10月30日星期日
Developments of Heat Exchanger
The structural characteristics of the evaporator plate and the use of
Either way the above changes, better use of the evaporator plate to play in that form of change, to find changes in the development of state development.
Shell and tube heat exchanger is usually a fixed tubesheet, U-shaped tube and floating head three forms. Three structures have advantages and disadvantages for different occasions. Shell and tube heat exchanger as long as the shell, tube sheet, tubes, sealed top component composition.
Although the shell and tube heat exchanger is a generalized product, but in conditions of varying heat transfer conditions, due to the limitations of its structure, hot and cold logistics operating conditions and physical properties of multilateralism, and the specific work conditions to optimize the design of the lack of means, often made of shell and tube heat exchanger heat transfer efficiency at a lower run, with the petrochemical and energy industry, the rapid development of enterprise energy research deepens, the recent development of many new processing technology, for example, heat exchanger networks using pinch technology, logistics and pre-heating process to increase recycling, reduce the heating or cooling load and utility consumption, has received very good results. However, the subsequent use of the system when the heat becomes more vast and complex, due to the depth of the heat recovery heat transfer temperature difference resulted in a significant decline in the heat transfer network, resulting in a sharp increase in heat transfer area, in order to improve heat transfer efficiency of heat exchangers, research is imperative to enhance heat transfer technology, the current involves the most extensive study was undoubtedly the deepest convection heat transfer technology. Previously, shell and tube heat exchangers used for baths bath, industrial demands for water continue to the industry, as well as features of the industry.
...
Sources from Developments of Heat Exchanger
Keywords: reactor，pressure vessel，heat exchanger
Either way the above changes, better use of the evaporator plate to play in that form of change, to find changes in the development of state development.
Shell and tube heat exchanger is usually a fixed tubesheet, U-shaped tube and floating head three forms. Three structures have advantages and disadvantages for different occasions. Shell and tube heat exchanger as long as the shell, tube sheet, tubes, sealed top component composition.
Although the shell and tube heat exchanger is a generalized product, but in conditions of varying heat transfer conditions, due to the limitations of its structure, hot and cold logistics operating conditions and physical properties of multilateralism, and the specific work conditions to optimize the design of the lack of means, often made of shell and tube heat exchanger heat transfer efficiency at a lower run, with the petrochemical and energy industry, the rapid development of enterprise energy research deepens, the recent development of many new processing technology, for example, heat exchanger networks using pinch technology, logistics and pre-heating process to increase recycling, reduce the heating or cooling load and utility consumption, has received very good results. However, the subsequent use of the system when the heat becomes more vast and complex, due to the depth of the heat recovery heat transfer temperature difference resulted in a significant decline in the heat transfer network, resulting in a sharp increase in heat transfer area, in order to improve heat transfer efficiency of heat exchangers, research is imperative to enhance heat transfer technology, the current involves the most extensive study was undoubtedly the deepest convection heat transfer technology. Previously, shell and tube heat exchangers used for baths bath, industrial demands for water continue to the industry, as well as features of the industry.
...
Sources from Developments of Heat Exchanger
Keywords: reactor，pressure vessel，heat exchanger
2011年10月28日星期五
Reactor failure phenomena and solutions
Autoclave Reactor failure phenomena and solutions:
A failure phenomenon: there is a leak at the valve.
Failure: Reactor stem (pin), valve port sealing surface damage.
Remedy: repair, replacement stem (pin), the valve port.
Symptom 2: outside the magnet rotates within the magnet does not turn the motorcurrent is reduced.
Cause: The temperature rise inside the reactor vessel is too high, resulting in poorcooling cycle, temperatures inside the magnet due to magnetic faded.
Hydrogenation reaction, there are cracks within the magnet sets, expansion within the magnet.
Remedy: notify supplier to replace the internal magnet.
Symptom 3: magnetic coupling within the actuator friction noise.
Failure: bushings, bearings wear, the gap is too large, there beats within the magnetrotation.
Remedy: Contact with suppliers, replacement bearings, bushings.
4, fault phenomenon: leakage at the sealing surface.
Failure: Reactor screw thread loosening; sealing surface damage.
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Sources from Reactor failure phenomena and solutions
Keywords: reactor，pressure vessel，heat exchanger
A failure phenomenon: there is a leak at the valve.
Failure: Reactor stem (pin), valve port sealing surface damage.
Remedy: repair, replacement stem (pin), the valve port.
Symptom 2: outside the magnet rotates within the magnet does not turn the motorcurrent is reduced.
Cause: The temperature rise inside the reactor vessel is too high, resulting in poorcooling cycle, temperatures inside the magnet due to magnetic faded.
Hydrogenation reaction, there are cracks within the magnet sets, expansion within the magnet.
Remedy: notify supplier to replace the internal magnet.
Symptom 3: magnetic coupling within the actuator friction noise.
Failure: bushings, bearings wear, the gap is too large, there beats within the magnetrotation.
Remedy: Contact with suppliers, replacement bearings, bushings.
4, fault phenomenon: leakage at the sealing surface.
Failure: Reactor screw thread loosening; sealing surface damage.
...
Sources from Reactor failure phenomena and solutions
Keywords: reactor，pressure vessel，heat exchanger
Laboratory reactor control theory
Laboratory reactor control theory
Control the reactor temperature to avoid internal and external temperature exceeds the maximum allowed. Heating reactor and when the cover must be careful,because they will lead to local temperature exceeds 350 ℃. When using a transformer, and gradually increase the voltage in the preparation period we recommend using 3 / 4 of the voltage (ie, half-power) until the internal temperature reaches your desired range, so as not to exceed the maximum temperature difference △ T. In the reactor in response to different media to do, you should firstfind out whether the corrosion medium on the subject material.
Of severe transient response, resulting in a large number of flammable gases orhigh-temperature chemical reactions, and high pressure, ultra-high temperature ormedium chlorine ions, fluoride ions on the corrosion of stainless steel have a severe reaction to be special orders. Set in the reactor with platinum resistance or thermocouple, using a different temperature difference into electricitytelecommunications number, transmission instructions to the temperature regulator,heating circuit using solid state voltage regulator to regulator, adjust thepotentiometer to change the size of the heating the size of the output voltage tostepless voltage regulation, if an appropriate adjustment can meet the purpose ofheating rate and temperature.
...
Sources from Laboratory reactor control theory
Control the reactor temperature to avoid internal and external temperature exceeds the maximum allowed. Heating reactor and when the cover must be careful,because they will lead to local temperature exceeds 350 ℃. When using a transformer, and gradually increase the voltage in the preparation period we recommend using 3 / 4 of the voltage (ie, half-power) until the internal temperature reaches your desired range, so as not to exceed the maximum temperature difference △ T. In the reactor in response to different media to do, you should firstfind out whether the corrosion medium on the subject material.
Of severe transient response, resulting in a large number of flammable gases orhigh-temperature chemical reactions, and high pressure, ultra-high temperature ormedium chlorine ions, fluoride ions on the corrosion of stainless steel have a severe reaction to be special orders. Set in the reactor with platinum resistance or thermocouple, using a different temperature difference into electricitytelecommunications number, transmission instructions to the temperature regulator,heating circuit using solid state voltage regulator to regulator, adjust thepotentiometer to change the size of the heating the size of the output voltage tostepless voltage regulation, if an appropriate adjustment can meet the purpose ofheating rate and temperature.
...
Sources from Laboratory reactor control theory
Keywords: reactor，pressure vessel，heat exchanger
2011年10月27日星期四
Glass and stainless steel autoclave reactor
Glass and stainless steel autoclave reactor used, what is the difference in
Advantages and disadvantages of both in stark contrast to the glass reactor has a very good chemical stability, excellent corrosion resistance, acid and alkali drawback is poor thermal conductivity of stainless steel reactor with excellent thermalconductivity drawback is the poor resistance to acid and alkali course this is the general direction of the above comparison is for the stainless steel reactor called the316L has a good material to make up for the shortcomings of acid and alkaliintolerance is very expensive, but you can both advantages and disadvantages of the choice of optimal.
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Sources from Pressure vessel problems with the plumbing
Keywords: reactor，pressure vessel，heat exchanger
Advantages and disadvantages of both in stark contrast to the glass reactor has a very good chemical stability, excellent corrosion resistance, acid and alkali drawback is poor thermal conductivity of stainless steel reactor with excellent thermalconductivity drawback is the poor resistance to acid and alkali course this is the general direction of the above comparison is for the stainless steel reactor called the316L has a good material to make up for the shortcomings of acid and alkaliintolerance is very expensive, but you can both advantages and disadvantages of the choice of optimal.
...
Sources from Pressure vessel problems with the plumbing
Keywords: reactor，pressure vessel，heat exchanger
2011年10月25日星期二
Types of Hybrid Heat Exchanger
Hybrid heat exchanger is to rely on cold and hot heat transfer fluid for direct contact, this way to avoid heat transfer and heat transfer partitions on both sides of the fouling resistance, as long as the contact between the fluid in good condition, there is a large the heat transfer rate. Therefore, any occasion to allow the fluid mixed with each other, can be mixed heat exchanger, such as gas washing and cooling, cooling circulating water, steam - water mixture between the heating steam condensate, and so on. It can be applied throughout the chemical and metallurgical enterprises, power engineering, air-conditioning engineering, and many other manufacturing sectors.
According to different purposes, hybrid heat exchanger can be divided into several different types:
(1) heat exchanger cooling tower (or cooling tower) in this device, with natural ventilation or mechanical ventilation method, the production has increased the temperature of cooling water for cooling after the cycle in order to increase the economic efficiency of the system. Such as thermal power plants or nuclear power plants circulating water, ammonia production in the cooling water, cooling water cooling tower through recycling after use, this method in practical engineering has been widely used.
...
Sources from Types of Hybrid Heat Exchanger
Keywords: reactor，pressure vessel，heat exchanger
According to different purposes, hybrid heat exchanger can be divided into several different types:
(1) heat exchanger cooling tower (or cooling tower) in this device, with natural ventilation or mechanical ventilation method, the production has increased the temperature of cooling water for cooling after the cycle in order to increase the economic efficiency of the system. Such as thermal power plants or nuclear power plants circulating water, ammonia production in the cooling water, cooling water cooling tower through recycling after use, this method in practical engineering has been widely used.
...
Sources from Types of Hybrid Heat Exchanger
Keywords: reactor，pressure vessel，heat exchanger
Tube Heat Exchanger and Plate Heat Exchanger
Tube heat exchanger tube heat exchanger is controlled by the diameter of the different straight into the concentric casing, connected together by the U-shapedbend in the heat exchanger, a fluid inside the tube, and the other take a fluid annulus, which can be obtained with higher flow rates, so the heat transfer coefficient. in addition, the tube heat exchanger, two fluids for pure counter-current, largelogarithmic mean driving force. Simple tube heat exchanger, can withstand high pressure, the application is also convenient (subject to increase or decrease the number of pipe), especially since both tube heat exchanger with heat transfer coefficient, heat transfer driving force can be big and strong to withstand high pressure the advantages of the high pressure production process (such as operating pressure of 3000 atmospheres pressure polyethylene production process) in the heat exchanger used in almost all tube type.
Plate heat exchanger: the most typical partitions heat exchanger, industrial applications it has a long history, and all the heat exchanger is still dominant. The main structure of the heat exchanger plates and plates of the strip between the composition. Long-term dominance in the market, but its bulky, heat transfer efficiency is low, replace the expensive tape (tape replacement costs account for about 1/3-1/2 of the whole process), mainly used in liquid - liquid between the heat exchanger, often referred to as water of heat transfer within the industry, the heat transfer efficiency 5000w/m2.K.
...
Sources from Tube Heat Exchanger and Plate Heat Exchanger
Keywords: reactor，pressure vessel，heat exchanger
Plate heat exchanger: the most typical partitions heat exchanger, industrial applications it has a long history, and all the heat exchanger is still dominant. The main structure of the heat exchanger plates and plates of the strip between the composition. Long-term dominance in the market, but its bulky, heat transfer efficiency is low, replace the expensive tape (tape replacement costs account for about 1/3-1/2 of the whole process), mainly used in liquid - liquid between the heat exchanger, often referred to as water of heat transfer within the industry, the heat transfer efficiency 5000w/m2.K.
...
Sources from Tube Heat Exchanger and Plate Heat Exchanger
Keywords: reactor，pressure vessel，heat exchanger
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