Plate heat exchanger technology developments

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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Keywords: reactor，pressure vessel，heat exchanger

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.

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Keywords: reactor，pressure vessel，heat exchanger

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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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.

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Keywords: reactor，pressure vessel，heat exchanger 

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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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.

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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.
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Introduction of Energy-volume Heat Exchanger

Introduction of Energy-volume Heat Exchanger

Automatic temperature control, energy-volume heat exchanger, which make full use ofsteam energy, efficiency, energy saving is a new water heater. Ordinary water of heat exchanger heat exchanger configuration is generally required to reduce thetemperature of the steam condensate for reuse. The energy-saving condensing heat exchanger water temperature at 75 ℃ or so, back to the boiler room can be directlyreused. This reduces equipment investment, saving heat exchanger room area,thereby reducing infrastructure costs: so energy-efficient volumetric heat exchangerunit welcomed by the majority of design users.

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Reactor fermentation industry applications

 Fermentation industry is inseparable from stainless steel autoclave, in our lives a lot of items are generated by fermentation. Reactor  through the stainless steel fermentation industry has been driven more than a billion for the domestic and the international market with a lot of necessities of life food, such as spices, sour agent, highly active dry yeast, starch and starch sugars, organic acids, feed additives. In addition to the use of stainless steel reactor outside the above description of several new items have appeared, over the past decade to develop into industrial production of fermentation products with special features, such as oligosaccharide, fungal polysaccharides, sugar alcohols, active peptide, microbial agents, and biological preservatives, etc., to meet the health needs of different groups of people. Production of such goods before the time is very old, very old methods, now have such a good stainless steel reactor equipment to facilitate a lot, now manufactured by fermentation using microorganisms. I believe in the future fermentation industry, the better the performance.

This article provided by the Weihai Huanyu reactor: Reactor fermentation industry applications

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Volume and plate heat exchanger

Volume heat exchanger and plate heat exchanger

Volume heat exchanger and plate heat exchanger is the difference between the former has the ability to store large amounts of water, hot buffering capacity. Volume heat exchanger water capacity greater storage capability. But the appearance of larger, relatively low heat transfer efficiency. Compact plate heat exchanger, heat transfer coefficient is high, hot start quickly.

Heat exchanger is the tank volume, heat resistance, but more bulky covers, heat transfer efficiency is relatively low, scaling is not good cleaning. Install the high cost oftransportation problems. Compact plate heat exchanger, heat transfer coefficient is high, hot start quickly. However, the larger the internal resistance.

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Radiators and heat exchangers

Radiators and heat exchangers

Air-conditioning refrigeration cycle system in general by the compressor, condenser,throttle valve, evaporator and other components, which collectively referred to as the evaporator and condenser heat exchanger, copper and aluminum are two kinds ofmaterial
Material made ​​of. Generally U-shaped copper tube bent, U-shaped nozzle and then with the semi-circular welded pipe, made ​​of copper through the aluminum fin. Brasstube technology with expansion up to make close contact with brass and aluminum,two closely with each other vertically.

Radiator: Radiator is used to transfer, release heat range of devices collectively.There are currently radiator heating radiator, radiator computer.
Home heating radiators, central heating heat source for the city generally, communityself-built boiler room, home boiler, etc., by heat conduction, radiation, heat convectionto heat up, so that the room temperature may be raised. Currently on the marketheating radiator material is basically divided into the brass from aluminum finconvection radiator, steel radiator, aluminum radiator, copper radiator, stainless steelradiator, copper-aluminum composite radiator, etc., also with the original cast ironradiators.

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Variety of pressure vessels division

 Variety of pressure vessels division

Pressure vessels in the production process by the action principle, divided intoreaction pressure vessels, pressure vessels, heat exchangers, pressure vessels,separation, storage pressure vessel.

Specific divided of as  Variety of pressure vessels follows:
(1) reaction pressure vessel (code R): is mainly used to complete the physical media,pressure vessels, chemical reactions, such as various reactors, reactor,polymerization reactor, reactor, transform furnace, gas furnace and so on.
(2) heat exchanger pressure vessel (code E): is mainly used to complete the heatexchange medium pressure vessels, such as various heat exchangers, coolers,condensers, evaporators, and so on.
(3) separation of the pressure vessel (Code S): the medium is mainly used to complete the buffer fluid pressure balance and separation of gas purificationpressure vessels, such as the various separators, filters, oil, scrubbers, absorption tower, copper washing tower, drying tower, stripper, sub-cylinder, oxygen, etc..
(4) storage pressure vessel (code C, where spherical code B): mainly used forstorage, dress gases, liquids, liquefied gases and other media, pressure vessels,such as the various types of tank, buffer tank, sterilizer, dyeing machine, dryer,steamer, etc.
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Glass and stainless steel reactor

Glass and stainless steel autoclave reactor

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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Keywords: reactor，pressure vessel，heat exchanger

Titanium and stainless steel reactor

Features of Titanium and stainless steel reactor

Titanium reactor for laboratory dispersion, mixing, emulsification, homogenization,dissolution. Titanium reactor in vacuum or pressure conditions, the glass reactorthrough the material for the observation of the mixing, homogenizing, emulsifying, dispersing, mixing and other reaction. Titanium reactor can simultaneously measurethe material temperature, pressure, viscosity, PH and so on. Materials can also be heated or cooled.

Stainless steel reactor Scope: Suitable for petroleum, chemical, pharmaceutical,metallurgy, scientific research, universities and other departments for high-temperature, high pressure chemical reaction experiments, the viscous and particulate material can achieve high mixing effect.

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Classification of Electric heating reactor

Electric heating reactor enamel basic classification

First, the enamel of the electric heating reactor mainly by its pot, kettle lid body, the body kettle agitator, jacketed reactor body, reactor vessel body and the body supportgear, vessel and other components of the body seal device, it materials and openingthe process according to the requirements of our customers and develop.

Second, by the enamel forms of electric heating reactor heating reactor can be divided into electric heating, oil heating enamel reactor, steam heated enamelreactor, the reactor water heating enamel, fire and other heat-type reactor.

Third, according to its jacket into the form: jacketed reaction vessel and the outerenamel plate semi-tube type reactor, heat transfer oil or heating jacket are equipped with the type of diversion devices.

Fourth, enamel reactor in the form of electric heating in general there are paddle-styleanchor, frame style, thread style, scraping the wall box-style and so on. In contrast to these, high-speed reactor type is scattered on the main type of impeller, turbine, highshear, the propeller-type, according to its process for customers to choose.

Fifth, enamel electric heating reactor agitator drive is a common form of the mainmotor, explosion-proof motor, electromagnetic governor motor and the inverter, etc.,it has cycloid gear wheel, the worm style, infinitely variable speed planetary type and so on.

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Tips to Clean Reactor

Tips to Clean Reactor
A mechanical cleaning: high pressure cleaning equipment, the 150-200MPa high-pressure water washed through the stainless steel reactor nozzle dirt.

Second, the chemical cleaning: first of all to know the scale-like element within the device, it is best to sample analysis. After the dirt do first test to determine thecomposition, selection of cleaning agents also determined by experiments on the stainless steel reactor will not cause corrosion of metal equipment. Then loop through the field to set up temporary devices within the cleaning fluid circulating in the device,wash away the dirt.

    These two methods have advantages and disadvantages, chemical cleaning, less labor, cleaning time is short, thorough cleaning, but may cause corrosion of stainless steel reaction vessel equipment; mechanical cleaning equipment will not cause corrosion of stainless steel reactor, on the hard scale can be effectively cleaned,However, when using long, labor-intensive. Therefore, chemical cleaning applicationsin the dirt soft, thin condition, mechanical cleaning applications in the dirt hard, thickconditions. As for what should be the best option, it is necessary according to their specific situation.

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How to do Reactor Maintenance

Maintenance of reactor and other mechanical devices in addition to the conditions ofthe same note, there is attention to the following questions

1, in operation, reactor should be carefully checked for anything abnormal, in normal operation, the board shall open the cover and touch the terminals to avoid electric shock.
2, reactor the measuring instrument should be calibrated regularly to ensure accurate and reliable work.
3, the heating rate should not be too fast, slow pressure should be, especially the stirring speed, only slowly increases the speed. In case of power failure, should betransferred back to zero speed control knob.
4, no quick cooling to prevent excessive thermal stress damage.
5, reactor operation, the coupling between the lid and kettle water jacket cooling water must pass in order to control the operating temperature magnet, to avoiddemagnetization.
6, is strictly prohibited under high pressure tap screw bolt and nut connection.

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Whole heat exchanger air conditioning

The whole heat exchanger air conditioning unit works

The whole heat exchanger Products: refers to a heat exchange core body containingall the fresh air and exhaust ventilation equipment. The working principle is: the product work, interior ventilation and fresh air are positively cross-way through the heat exchanger core body, due to air flow divider on both sides of the existence oftemperature and steam partial pressure, the two streams are separated by theboard showing the phenomenon of heat and mass transfer, causing the whole heat exchange process. Summer running, get fresh air from the cold air exhaust, thetemperature decreases, while the wind is air dried to reduce moisture content to make the new air; winter run, the new air-conditioned room from the exhaust air to obtain heat, temperature, and was air-conditioning room exhaust air humidification.In this way, the whole body through the heat exchanger core heat transfer process,so that fresh air from the exhaust air energy recovery.

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How Full of fresh air heat exchanger works

Full of fresh air heat exchanger works

The so-called fresh air system is a host of new air exchanger and piping accessories consisting of a set of independent systems, and air conditioning system is very similar. New air exchanger is a fresh outdoor air through the filter, purification, treatment sent to the indoor heat exchanger, but will also harmful indoor air pollution through the filter and purify. Exhausted to the outside after heat exchange process, while the indoor air temperature is largely unaffected by the new influence of an energy efficient, environmentally friendly high-tech products. How it works: When the indoor air conditioning return air and outdoor air, respectively, are cross-way through the heat exchanger into, because there is a flat diaphragm on both sides of the temperature difference between air and water vapor partial pressure difference, between two streams while producing heat and mass transfer, causing total heat exchange process.


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Keywords: reactor，pressure vessel，heat exchanger

How to clean the reactor

How to clean the reactor
A mechanical cleaning: high pressure cleaning equipment, the 150-200MPa high-pressure water washed through the stainless steel reactor nozzle dirt.

Second, the chemical cleaning: first of all to know the scale-like element within the device, it is best to sample analysis. After the dirt do first test to determine the composition, selection of cleaning agents also determined by experiments on the stainless steel reactor will not cause corrosion of metal equipment. Then loop through the field to set up temporary devices within the cleaning fluid circulating in the device, wash away the dirt.

These two methods have advantages and disadvantages, chemical cleaning, less labor, cleaning time is short, thorough cleaning, but may cause corrosion of stainless steel reaction vessel equipment; mechanical cleaning equipment will not cause corrosion of stainless steel reactor, on the hard scale can be effectively cleaned, However, when using long, labor-intensive. Therefore, chemical cleaning applications in the dirt soft, thin condition, mechanical cleaning applications in the dirt hard, thick conditions. As for what should be the best option, it is necessary according to their specific situation.


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Keywords:reactor，pressure vessel，heat exchanger

What is the low-temperature pressure vessels

What is the low-temperature pressure vessels

Design temperature of -20 ℃ below the pressure vessel; liquefied ethylene, liquefied natural gas, liquid nitrogen and liquid hydrogen storage and transport of such containers are low-temperature pressure vessels. General pressure vessel ferritic steel used in the temperature decreases to a certain temperature, the toughness of the steel will decline sharply, and became very brittle, usually called the temperature of brittle transition temperature. Below the transition temperature in the pressure vessel under the conditions used, the container as there are any defects, residual stress, stress concentration factors due to high local stress, the container may not appear obvious in the case of plastic deformation and brittle fracture occurs lead to catastrophic accidents.


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Cooling system have any effect on reactor

In the stainless steel reactor for chemical reactions, often with great heat, which is we have to take technology for cooling, and how to achieve the cooling effect, coat the stainless steel reactor with a cooling system. Chemical production is inseparable from cooling systems, such as stainless steel reactor, steam heated stainless steel reactor vessel and other cooling systems, cooling water treatment company uses technology not only can solve the production instability, low heat transfer efficiency problems, but also greatly reduce production water. The application of water treatment agent, can further improve the performance of cooling water treatment process to achieve the purpose of water stable.

This can be a stainless steel reactor experiment then to Zhongyuan Dahua ammonia plant, for example, circulating water system cycle is about 30,000 m3 / h, if the circulating water system is not functioning properly cause the device to stop, every day will stop once resulting in more than 100 million of losses.

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Characteristics of Titanium Reactor

characteristics of Titanium reactor:

1, the reactor can be made ​​of titanium corrosion experiments, titanium have been very lively, but easy to form the passive, and relatively stable passivation layer, usually with corrosive materials used in the reaction;
2, because titanium Reactor has a high specific strength, excellent heat resistance, corrosion resistance and fracture toughness, etc., so the titanium reactor in the aviation, aerospace, petrochemical, medical and geological fields was extremely popular;
3, titanium reactor also becomes more widely used in civilian areas, such as automotive, electrical, leisure and other industries. With the widespread use of titanium and its alloys, the welding performance is more and more user attention.

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Problem of Pressure Vessel Pipe

Problem of Pressure Vessel Pipe:
  Butt joints of pressure vessels for all (100%) or partial (20%) non-destructive testing: When using radiation detection, according to its quality through not less than Class AB, the eligibility level for the grade Ⅲ, and there is no welding is not allowed permeability; when taken ultrasound, its qualified level Ⅱ.

    Of GB150, GB151 and other standard requirements for all (100%) non-destructive testing pressure vessels, pressure vessels, the third category, the weld coefficient ⒈ 0 can not pressure vessels and internal and external inspection or pressure testing of pressure vessels, the butt joint for all (100%) non-destructive testing: When using radiation detection, according to its quality through not less than Class AB, the eligibility level for the grade Ⅱ; when using ultrasonic testing, its qualified level Ⅰ.


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Tips on Pressure Vessel

This article will guide you effective tips to learn Chinese for all Chinese learners.

Effective Tips for Learning Chinese

1. Learn Chinese sentences each day, just like Chinese circadian conversations, Chinese proverb. Remember, apprentice the simple and advantageous sentences, and don't apprentice the circuitous book at beginning.

2. Accept to the tapes of Chinese circadian conversations back you accept a additional time or a bisected hour, accept to some basal songs and words will advice you to body a faculty of accent in a abbreviate time. You can learn Chinese online free everyday.

3. Watching TV affairs "learning Chinese" in CCTV all-embracing approach (maybe CCTV approach 9).That approach will advice you to apprentice some simple Chinese book and advantageous conversation.

4. Talk with Chinese people in chinese, they could correct your pronunciations. Again you will advance your Chinese accentuation and chat and additionally apprentice Chinese acceptable ability better. This is a good way to learn Chinese.


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Introduction of Non-plate heat exchanger wall

Non-plate heat exchanger wall

     For non-flat heat exchanger wall, such as flat-plate heat exchanger plate, threaded tubes and corrugated tubes, etc., interfere with the geometry of the wall heat the stratosphere liquid flow, the maximum possible flow through the wall of the turbulent fluid force and the vertical wall on the heat transfer fluid to increase the chance of erosion, will greatly reduce the boundary layer thickness. Therefore, Weihai Huanyu manufacturers to remind you when to pay attention to the use of wall heat exchanger selection and proper operation to avoid operational errors.

This article from the reactor provided by the manufacturer Weihai Huanyu

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Introduction of Shell and tube heat exchanger

 Shell and tube heat exchangers are composed of copper u-tubes in a carbon steel shell, are easy to clean and inspect, very durable, and are a simple solution for tube expansion. Their coil and baffle arrangement maximizes heat transfer performance. The rugged and reliable shell and tube heat exchanger is perfect for process systems where conditions and materials are often extremely corrosive and abrasive.

As a heat transfer device, it is the function of a heat exchanger to transfer heat as efficiently as possible. This makes it the ultimate device of choice, for instance, when it comes to saving energy by recovering wasted heat and making it useful again. When there is a waste of energy or a heat stream that is not recovered, a heat exchanger can covert that heat stream into something that we can use.

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Keywords: heat exchanger, heat transfer