Industry FAQs

Cold storage manufacturing industry market in China       Cold storage is one of the important infrastructures in the cold chain logistics industry. In recent years, the quantity of cold storage in China has increased, but compared with the huge market demand is still insufficient. According to data from China Internet of Things, the demand for cold storage in the first half of 2018 exceeded 1.5 million square meters, up 14.9% year on year. At present, domestic cold storage demand is mainly concentrated in Beijing, Shanghai, Guangzhou and Shenzhen, as well as Fujian, Tianjin, Zhejiang, Jiangsu, Shandong, Chongqing, and Henan. (The darker the color, the greater the demand)        Cold storage, as an important tool in cold chain logistics, is related to a number of market segments. Among them, the third-party logistics enterprises have the largest demand for multi-cold storage, while the food processing enterprises have the smallest demand.        The demand for cold storage is growing day by day, and the concentrated area of the cold storage leasing market is close to the demand concentrated area. According to incomplete statistics, in the first half of 2018, the rentable area of cold storage in China exceeded 3.3 million square meters, with a year-on-year growth of 12.1%. The range of rental cold storage is mainly concentrated in Beijing, Shanghai, Guangzhou and Shenzhen, as well as Hubei, Shandong, Jiangsu, Liaoning, Shandong, and Henan. (The darker the color, the greater the demand) Through the comparison of cold storage demand heat map and cold storage rental heat map, it can be seen that the domestic cold storage supply and demand pattern has the following characteristics:        The supply and demand of cities such as Beijing, Shanghai and Guangzhou are flourishing. Fujian, Zhejiang, Guizhou, and Henan have strong demand and insufficient cold storage. These are mainly second-tier provincial capitals, which will face a new round of rapid economic development and consumption upgrading, and the cold storage market will further expand in the future.       Hubei, Hunan, Shandong and others are relatively surplus cold storage. First of all, in the cold storage business, to find the right positioning to achieve differentiation. Secondly, the cold storage surplus is not only because of less demand, but also may be because the cold storage itself can not meet the demand. The materials and analysis are from the "2018-2023 China Cold Storage Market Prospects and Investment Opportunities Research Report" released by China Institute of Commerce and Industry.

Principle of refrigeration equipment Freezing: the operation of using the low temperature source generated by refrigeration to cool the product from room temperature and then freeze it.Refrigeration: The operation of obtaining a low temperature source by means of a cooling effect resulting from a change in the physical state of the refrigerant.Types of refrigeration equipment: cold source production (refrigeration), material freezing, cooling. Refrigeration mode: piston type, screw type, centrifugal refrigeration compressor unit, absorption refrigeration unit, steam injection refrigeration unit and liquid nitrogen.Freezing mode: air cooled, impregnated and refrigerant through metal pipe, wall and material contact heat transfer and cooling device.Application:1. Freezing, refrigerating and freezing transportation of food.2. Cooling, cold storage, air-conditioned storage and cooling transportation of agricultural products and food.3. Food processing, such as freezing drying, freezing concentration and material cooling, etc.4. Air conditioning in food processing plants. Principle of refrigeration cycleMain devices: refrigeration compressor, condenser, expansion valve, evaporator. Refrigeration cycle principle: refrigerant in the low temperature low pressure liquid state when heat boiling evaporation become after low temperature low pressure steam, evaporated into gas refrigerants in the compressor, become the high temperature and high pressure gas, after the high temperature and high pressure condensate as high pressure liquid, high pressure liquid after expansion valve into low pressure low temperature, heat evaporation constitutes the refrigeration cycle of refrigerating machine again. Basic concepts and principlesRefrigeration capacity: under a certain operating conditions (i.e., a certain refrigerant evaporation temperature, condensation temperature, supercooling temperature), unit time refrigerant from the refrigerant removed heat. Also called refrigerant capacity. Under the same conditions, the refrigeration capacity of the same refrigerant is related to the size, speed and efficiency of the compressor.Direct refrigeration: in the refrigeration cycle, if the refrigerant-absorbing evaporator directly exchanges heat with the cooled object or the surrounding environment of the cooled object. It is generally used in single refrigerating equipment, such as ice cream freezing machine, small refrigerators and household refrigerators.Refrigerant: A working substance in a refrigeration unit that circulates continuously for refrigeration. The steam compression refrigeration device transfers heat through the change of refrigerant state. Refrigerant is an indispensable substance to realize artificial refrigeration.Indirect refrigeration: the use of cheap material as a medium to realize the heat exchange between the refrigeration unit and the cold consuming place or machine.Refrigerant: the refrigerant in the refrigeration device into the evaporator generated by the cold transfer to the cooled object, absorbed heat to the refrigeration device and then transferred to the refrigerant, its own re-cooling cycle.Principle of indirect evaporative refrigerationIndirect refrigeration principle: the refrigerant in the evaporator from the refrigerant to absorb cold, through the salt pump into the cold storage, and the cooling object or the medium of the workplace heat exchange absorb heat, back to the evaporator, the absorbed heat transfer to the refrigerant, its own cooling cycle. Commonly used refrigerant carrierCommonly used coolant: air, water, brine and organic water solution.Selection criteria: low freezing point, large specific heat capacity, no metal corrosion, chemical stability, low price and easy access to other factors, as a food industry for the coolant, often must have tasteless, odorless, colorless and non-toxic conditions.Although air as a load coolant has more advantages, only because of its small specific heat capacity, and as a gas to use its convective heat transfer effect is poor, so in food refrigeration or frozen processing, is used in the form of direct contact with food.Water is larger than heat, but its freezing point is high, so it can only be used as a refrigerant for making a cooling capacity above 0℃. If you want to make the coolant below 0℃, use brine or organic solution as coolant.The aqueous solution of sodium chloride, calcium chloride and magnesium chloride is usually called frozen brine. The most widely used frozen brine in the food industry is sodium chloride aqueous solution. Among the organic solution coolers, the two most representative coolers are the aqueous solution of ethylene glycol and propylene glycol.（Not the original）

What is the current status of the domestic microchemical industry?       The medical and chemical industries are related to the development of the entire country and the quality of people’s livelihood, and are important pillar industries that measure a country’s national strength. Different from other industries, the chemical production industry faces a more severe safety situation. In particular, once many hazardous chemical accidents occur, there will often be a large number of casualties at the same time, causing extremely bad social effects. In addition to frequent chemical accidents, problems such as high energy consumption, high pollution, waste of resources, and low efficiency also restrict the development of the industry. On the one hand, it is related to human operation factors, and on the other hand, it is also related to backward equipment technology. In order to change this state, in recent years, a new technology-Micro Chemical technology, that can greatly shorten the chemical reaction time and better solve many chemical problems such as strong corrosion, pollution, high energy consumption, flammability and explosion, etc.       Compared with traditional chemical technology, micro chemical technology has great future prospects and application value in fine chemical industry. The core of the whole technology is the microchannel reactor, which, with the characteristics of "three transmissions and one reverse", fundamentally solves the problems of strong corrosion, high pollution, high energy consumption, and flammability and explosion.       At present, my country's fine chemical manufacturers already have a considerable scale, especially the various types of fine chemicals among them are numerous. Although the scale is huge, the industry foundation is very weak. In particular, the level of safety management lags far behind other developed countries. Due to the lack of industrial technology and the imperfect level of legal and safety supervision and evaluation, the development process and safety level of the entire chemical industry are not at the same level.      The “Guidelines for the Safety Risk Assessment of Fine Chemical Reactions” issued by the State Administration of Work Safety clearly pointed out: For the reaction process, the process of risk level 4 and 5 or higher needs to be optimized to reduce the risk, such as micro-reaction, continuous Complete the reaction and so on. In particular, the advantages brought by micro-reaction technology in the field of fine chemicals can greatly improve the essential safety of the refinement process.      Based on micro-reaction technology, HZSS focuses on chemical process technology, focusing on the development of continuous flow micro-reactors and large-scale chemical equipment; researches on automation and precision control technology for the entire chemical production process, and develops digital, information, and intelligent chemical production processes; HZSS serves the R&D and production projects of pharmaceutical, dye, pesticide, environmental protection, nano-industry, petrochemical and other enterprises at home and abroad, helping customers develop and improve processes to achieve safer, more environmentally friendly and more efficient industrial production.

Advantages of fully automatic laser welding process?       Laser welding uses high-energy laser pulses to locally heat the material in a small area. The energy of the laser radiation diffuses into the material through heat conduction, and the material is melted to form a specific molten pool to achieve the purpose of welding. It is a new type of welding method, mainly for the welding of thin-walled materials and precision parts. It can realize spot welding, butt welding, stitch welding, sealing welding, etc., with high aspect ratio, small weld width, and small heat affected zone. Small deformation, fast welding speed, smooth and beautiful welding seam, no need to handle or simple processing after welding, high welding seam quality, no air holes, precise control, small focus spot, high positioning accuracy, easy to realize automation.       Laser welding has significant advantages that traditional welding methods cannot match: small heating range, narrow welding seam and heat-affected zone, excellent joint performance; small residual stress and welding distortion, high-precision welding can be achieved; high melting point, high thermal conductivity, Heat sensitive materials and non-metals are welded; the welding speed is fast, the productivity is high; and it is highly flexible.       The fluorine side head of HZSS's new shell and tube heat exchanger uses laser welding instead of the traditional head bolt gasket for forced sealing; the pressure is high, and there is no risk of leakage on the fluorine side. And the penetration depth is large; the penetration rate is high; the heat affected zone is small, and the cooling is extremely fast.

What is the development situation of PCHE in domestic offshore oil and gas field?        The printed circuit board heat exchanger (PCHE) itself is a clean and environmentally friendly product with considerable energy-saving effects, and the economic benefits it can bring are even more impressive. It is estimated that by 2022, the demand for PCHEs is about 500 units, worth about 2.5 billion to 5 billion yuan. In the field of offshore engineering, PCHEs can greatly save the construction cost of offshore equipment, and can be applied to offshore platforms, floating storage and regasification units (FSRU), FLNG and other offshore equipment.        Compact and high-efficiency heat exchangers (PCHE for short) are widely used in floating liquefied natural gas production storage and unloading units (FLNG), floating storage regasification units (FSRU) and offshore oil and gas production platforms. They are used in the development of oil and gas resources in the South China Sea and the entire ocean Core equipment.At present, the equipment is monopolized by Heatric in the United Kingdom, resulting in extremely expensive equipment, with a single quotation as high as millions of dollars. Heatric has supplied a total of 2500 PCHEs worldwide. Due to the lack of my country's high-end deep-sea key technology and equipment development capabilities, it does not have the ability to localize PCHEs for offshore oil and gas fields, which has become an important factor restricting my country's deep-sea oil and gas resource development. The PCHE high-efficiency heat exchanger used in the offshore oil and gas field is a core key technology that has been "stucked" by foreign countries, posing a threat to my country's independent development of deep-sea oil and gas resources.         Hangzhou Shenshi Energy Conservation Technology Co., Ltd., according to the PCHE thermal design plan provided by CNOOC, produces compact and efficient micro-channel heat exchangers (PCHE) for the offshore oil and gas field, laying the technology for accelerating the localization of my country's independent core equipment basis.        The compact and high-efficiency micro-channel heat exchanger (PCHE) is used in the offshore oil and gas field. This product fills the domestic gap and has generally reached the international advanced level. It can be used in offshore oil and gas/LNG and related fields. This signifies that China can independently develop and produce efficient and reliable PCHE equipment for offshore oil and gas fields! The localization of the equipment is of great strategic significance and economic benefits for breaking the monopoly of foreign technology, improving the level of domestic equipment manufacturing, and ensuring national energy security.

Fuel cell and hydrogen technologies (FCH)Hydrogen:        Hydrogen is an energy carrier, not an energy source, and can transport or store large amounts of energy. Hydrogen can be used in fuel cells to generate electricity or provide heat.        Hydrogen is a clean secondary energy carrier that can be easily converted into electricity and heat, has a high conversion efficiency, and has multiple sources. Using renewable energy to achieve large-scale hydrogen production, through the bridging effect of hydrogen, it can not only provide a hydrogen source for fuel cells, but also can be green converted into liquid fuels, so that it is possible to achieve a sustainable cycle of smooth transition from fossil energy to renewable energy , To give birth to a sustainable hydrogen economy. As a bridge connecting renewable energy and traditional fossil energy, hydrogen energy can bridge the realization of the "hydrogen economy" and the current or "post-fossil energy era" energy system. Therefore, the use of hydrogen energy as a clean energy source is an important part of the future energy transformation.The fuel cell:       Fuel cells combine hydrogen and oxygen to produce electricity, heat and water. It is common to compare fuel cells with batteries. Both convert the energy produced by chemical reactions into usable electrical energy. However, as long as fuel (hydrogen) is provided, the fuel cell will generate electricity without losing its charge.       Fuel cells are a promising technology that can be used as a heat source and electricity for buildings, and as a power source for electric motors that propel vehicles. Fuel cells work best on pure hydrogen. But fuels such as natural gas, methanol and even gasoline can be reformed to produce hydrogen for fuel cells. Some fuel cells can even use methanol directly as fuel without using a reformer.       Fuel cell technology. Hydrogen fuel cells can efficiently and cleanly convert chemical energy directly into electrical energy, which is a more advanced conversion technology than conventional heat engines. The rapid development of fuel cell technology has brought a major opportunity for the transformation of energy and power, and fuel cell vehicles are considered to be the main vehicle power source in the post-fossil energy era. Like electric energy, hydrogen, as an energy carrier, can be obtained through the conversion of various primary energy sources, becoming a bridge from fossil energy to non-fossil energy, from low carbon emissions to zero carbon emissions.The hydrogen energy industry chain mainly includes: hydrogen production, storage, transportation and application. Hydrogen can be widely used in traditional fields, but also in emerging hydrogen energy vehicles (including passenger cars, commercial vehicles, logistics vehicles, forklifts, rail cars, etc.) and hydrogen power generation (including combined heat and power distributed power generation, power generation Energy storage, backup power supply, etc.).Development focus of hydrogen energy:       Common key technologies such as fuel cell stacks, basic materials, control technologies, and hydrogen storage technologies; key components; infrastructure construction such as hydrogen, hydrogen transportation, and hydrogenation.

How doe sthe air conditioner use the heat exchanger?The air conditioner transfers the heat of the indoor space to the outdoors. Refrigerant is one of the main chemicals that this process relies on. When the refrigerant changes from a gas to a liquid and returns again in the cooling process, the refrigerant will carry, absorb and release heat.Step:1. In air conditioners, refrigerant flows through various components and moves heat with them.2. The refrigerant starts as a low-pressure liquid in the evaporator coil.3. The fan blows the indoor air to the coil through the coil. As the refrigerant absorbs the heat in the air, the refrigerant turns into vapor to cool the room.4. Now, the refrigerant is a kind of low-pressure heating, which enters the compressor (usually located outdoors) and is converted into high-pressure hot gas in the compressor.5. The refrigerant enters the condenser and usually also enters the condenser.6. When the air flows through the condenser, it will take away the heat in the refrigerant, so that the refrigerant becomes a high-pressure coolant again.7. The refrigerant will be further cooled in the expansion valve and then return to the evaporator to absorb more heat and carry it out of the building.Although the entire air conditioning unit can be regarded as a heat exchanger between indoor and outdoor spaces, the condenser is the part responsible for heat transfer in the air conditioner.A heat exchanger is a device that transfers heat energy from one medium to another. Heat exchangers not only help with cooling and heating of houses and buildings, but also help machines and engines work more efficiently.

What is integrated microchannel reactor?        The integrated microchannel reactor is a three-stack structure element that is made of a solid substrate with a small channel size and structure that can be used for chemical reactions by means of precision diffusion bonding technology. The reaction medium flows in the reaction layer channel and completes the required reaction in the channel, and the heat exchange medium is distributed on both sides of the reaction layer to provide the required temperature for the reaction. Applicable reactions of integrated microchannel reactor:l  Strong exothermic reactionl  Reactions with unstable reactants or productsl  Rapid reaction with strict reactant ratio requirementsl  Dangerous chemical reactionl  High temperature and high pressure reactionl  Nanomaterials and reactions requiring uniform distribution of products

What is a hydrogen liquefaction system? Fig1: Hydrogen liquefaction processProcess flow:The raw material hydrogen enters the cold box, is pre-cooled by the cold nitrogen pre-cooled primary heat exchanger HX-1, and then enters the liquid nitrogen pre-cooled secondary heat exchanger HX-2 to cool down, and then enters the liquid nitrogen immersed primary positive Parahydrogen converter for constant temperature conversion. The converted hydrogen gas is cooled by the third and fourth heat exchangers HX-3 and HX-4, and then enters the second-stage positive and secondary hydrogen converter for adiabatic conversion. At the same time, after exothermic heating, it returns to the four-stage heat exchanger HX-4 for cooling. . The cooled hydrogen gas is cooled by the fifth and sixth heat exchangers HX-5 and HX-6, and then enters the three-stage positive and secondary hydrogen converter for adiabatic conversion. At the same time, the heat is released and returned to the six-stage heat exchanger HX-6 for cooling. . The cooled hydrogen is cooled by a seven-stage heat exchanger HX-7, then cooled by a JT valve throttle, and then cooled by an eighth stage heat exchanger HX-8, and enters the fourth-stage positive-hydrogen converter for adiabatic conversion, while exothermic After the temperature rises, it will return to the eight-stage heat exchanger HX-8 again. After cooling, it will enter the liquid hydrogen storage dewar. The high-pressure helium gas discharged by the helium screw compressor is cooled by a water cooler, precooled by a cold nitrogen pre-cooled primary heat exchanger HEX1, and then enters a liquid nitrogen pre-cooled secondary heat exchanger HX-2. Then enter the three or four stage heat exchangers HX-3, HX-4 to cool down to a lower temperature, and then pass through a two-stage turbine in series. After the adiabatic expansion refrigeration in the middle of the cooling circuit, it becomes low temperature and low pressure helium gas. Eight-stage heat exchanger HX-8 low pressure side inlet. The returned low-temperature and low-pressure helium flows through the eighth to first-stage heat exchangers (HX-8~HX-1) in reverse flow in order to recover the cooling capacity, then exit the cold box, and then return to the suction side of the compressor for recirculation.Comparative advantages:1. Diffusion welding without solder, high and low temperature resistance (-200℃~900℃), high compactness, high heat exchange efficiency, low leakage rate (1*10-9Pa·m3/s), high bonding strength (10MPa). At the same time, the secondary bonding has no effect on the core weld, etc.2. The heat exchangers used in the domestic hydrogen liquefaction system are mainly aluminum alloy plate-fin heat exchangers. Due to the stringent product leakage rate requirements, the aluminum alloy plate-fin heat exchanger plates are selected to be thick, large, and heavy. And problems such as brazing are not easy to repair. Aluminum alloy plate-fin heat exchangers and stainless steel pipelines will face difficulties in welding aluminum alloy and stainless steel.The first domestic large-scale hydrogen liquefaction system developed by Shenshi's domestically produced diffusion-bonded stainless steel plate-fin heat exchanger solves the above problems and fills the blank of the steel plate-fin heat exchanger in the domestic hydrogen liquefaction field.Fig2: Hydrogen liquefaction system and steel plate-fin heat exchanger for low temperature

Current status of domestic and foreignmicro-channel  reactor industry     In the early 1990s, the research of micro-chemical technology startedabroad. The United States，Germ-any,Britain,France, Japan and other developedcountries have successively carried out research on micro-chemical engineeringand technology. According to incomplete statistics, there are currently morethan 50micro-chemical technology and equipment suppliers in the world, ofwhich Europe accounts for about 60%.It can be seen from Figure 1 that eachmicro-reactor system has its own characteristics and represents the current advanced level and development direction of microreactor design and manufacturing.      The micro-reactor module of Ehrfeld in Germanycan be easily disassembled and cleaned.     TheMini-lab micro-reaction system of Corning Corporation is a highly integratedmodular device that includes functionalmodules such as mixing, reaction, andheat exchange. All modules are made of glass.     TheSiprocess micro-reactor system of Siemens is an integrated modular system. Itscharacteristic is thateach module is equipped with an electronic system formeasurement and control, making it easier and moreprecise for people tocontrol the reaction process.     The Mainz Institute in Germany took thelead in developing an electrochemical micro-reactor for thesynthesis of methoxybenzaldehyde from p-methoxybenzylmethane.     TheMassachusetts Institute of Technology in the United States has developed amicro-filled reactor forgas-liquid-solid three-phase catalytic reactions.     HullUniversity in the United Kingdom designed a T-shaped liquid-liquid-liquid phasemicro-reactor. Thebiggest feature of this reactor is the use of electroosmosisto transport fluid.     TheT-shaped thin-walled micro-reactor designed and manufactured by theMassachusetts Institute ofTechnology is a representative gas phase micro-reactor.     Domesticresearch on micro-reactors has been carried out for more than ten years. Thedesign andmanufacture of micro-reactors, the exploration of micromixingprinciples, gas phase reaction, liquid phase reaction, nanoparticle preparationand other fields have been rapidly developed and have achieved remarkableresults. At present, the main research institutions of micro-reactiontechnology are Dalian University ofTechnology, University of Science andTechnology of China, East China University of Science and Technology, BeijingUniversity of Chemical Technology, etc.     TheChemical Machinery Research Institute of East China University of Science andTechnology produced a plate for the methanol steam reforming hydrogen micro-reactor.     TheUniversity of Science and Technology of China has developed a ceramic micro-reactorusing a sintering method and conducted an ethanol water vapor reforming micro-reactorexperiment, which has achieved gratifying results.     Aimingat the current macro-reaction system that cannot effectively treat ultra-lowconcentration pollutan-ts, Beijing University of Chemical Technology hasresearched and prepared a soft shell micro-reactor, which is combined with the advanced oxidation technology Fention reaction to effectively treatlow-concentration dye water. new method.    Theintroduction of zeolite and zeolite membrane into the micro-reactor by DalianUniversity of Technology can realize the combination of multiple advantages ofzeolite catalysis, membrane catalysis and microreaction technology.     Inaddition to universities and research institutes, a number of outstanding micro-reactormanufacturers have also emerged in the domestic market. Take Hangzhou ShenshiEnergy Saving Technology Co., Ltd. as an example, relying on various researchand development teams in cooperation with well-known domestic universities, ZhejiangUniversity, Tsinghua University, China Jiliang University, Shanghai Instituteof Organic Chemistry, Chinese Academy of Sciences, and Tianjin University,focusing on the development of chemical processes and industrial continuityEquipment system, successfully developed and produced the third-generation printed circuit heat exchangerproducts and micro-environment system equipment, realized thelocalization ofindustrialized micro-reactors, integrated catalyst-supported micro-channel reactors, Diffusion bonded hybrid heatexchanger, and integratedmicro-channel reactor. It is not uncommon for channelreaction systems to be usedin industrial cases. Hangzhou Shenshi development of localized micro-reactors is not only reflected in the equipment, as a new third-board listed company,after it has accumulated a strong advantage in the field of equipment, it hasexpanded to the field of military products. It is worth lookingforward toHangzhou Shenshi performance in the micro-reactor industry in the future.     Relyingon a strong process R&D and fluid simulation team, combined with advancedmachining capabilities, Heroic can provide customers with a complete set of micro-reaction systemengineering development and design.     Bornout of Heroic, Microwell Technology has creatively developed RTB micro-reactors withrectangular channel discs and cross-mixing channels based on precisionprocessing equipment based on fluid mechanics design.     Fromthe results, the micro-reactor has indeed promoted a large number ofpharmaceutical and chemical companies to achieve a comprehensive upgrade ofprocess technology.     In2011, the Research Institute of Sinopec Nanhua Group introduced ahigh-throughput-microchannel continuous flow reactor from Corning, USA, andsuccessfully developed new processes for nitration of chlorobenzene and specialrubber additives. Jiangsu Yangnong Chemical Pesticide uses Hangzhou Shenshi integrated micro-channel reactor device, which not only takes up a small space,but also increases the product yield by 6-8%, saving more than 1 million energycosts every year.     In recent years, systematic researches onmicro-reactors have been conducted at home and abroad, and breakthroughs havebeen made in key technologies such as micro-reactor design, manufacturing,integration, and amplification. Micromixers, integrated micro-channel reactors,and micro-reactors have been developed. Heater and other equipment, however,there are still some problems to be solved if the micro-reactor is to trulyreplace the traditional reactor for actual production.

Successful application case of HangzhouShenshi Channel Industrialization       In the pastten years, micro-channel reactortechnology has developed rapidly. Through the design ofthe channel shape,the channel size has been extended to the millimeter level, and thecharacteristics of themicro-channel reactor can be maintained to meet theneeds of industrial production, while achieving "sizeenlargement"and "number increase enlargement" "Combined, especially suitablefor multi-phase difficult tomix, strong exothermic, difficult to control fastreaction, and intermediate unstable, flammable and explosivereactions,suitable for chemical, pharmaceutical, dyes and other fields. Figure 1 micro-channel reactor        Hangzhou Shenshi began to introducemicro-channel heat exchanger technology in 2010, and cooperatedwith well-knowndomestic universities such as Zhejiang University and Tsinghua University. Itis in a leadingposition in the development and design of micro-reactionsystems. Figure 2 micro-channel reactor            Micro-chemicalcontinuous flow reaction system is the first civilian product developed byHangzhouShenshi's self-developed micro-level channel structure design andvacuum diffusion welding technologyapplication innovation. The device realizesthe product characteristics of safety, high mass transfer efficiency,high heattransfer efficiency, high pressure bearing capacity, high temperatureresistance and high corrosionresistance.       The micro-chemical system innovated a new reactorproduction process, improved the original reactionconditions, optimized thechemical process, and overturned the intermittent production of traditionalreactors.The reaction mode was realized as a microchannel continuous flowreaction automation control. The industrialcontrol of the device isincorporated into the DCS remote centralized control system, becoming anunattended, continuous and intelligent production of the entire productionline. Among them, the ShenshiMicrochemical reaction plate adopts more than tenunique structural designs, which can be superimposedaccording to differentreaction conditions.         Inaddition, the micro-reaction system also adopts a modular design, assembling anintegrated micro-channel reactor, an  Diffusion bonded hybridheat exchanger, an Printed circuit heat exchanger, and atubular reactor. Differentpermutations and combinations can meet the requirements of different chemicalprocesses. Miniaturization and mobility of industrial equipment.Successful industrial application cases        Hangzhou Shenshi Energy Conservation Technology Co., Ltd.and Jiangsu Yangnong Chemical Co., Ltd.cooperate in the field ofmicrochemicals. Yangnong Chemical is the largest production base of new-typebiomimetic pesticides-pyrethroids in China. Industries such as chloropropane,agricultural and sanitary pyrethroids have leading market positions and global influence. Figure 3 Chemical plant          YangnongChemical’s original intermediate production plant with an annual throughput of18,000 tonscovers an area of about 150 square meters and a building area ofabout 300 square meters. The workshoprequires two floors and the total heightof the device is about 15 meters. The intermediate project is changedtoShenshi  After the integrated micro-channel reactor, the whole device onlyneeds a 40-foot container to be fully loaded. The area is only about 28 squaremeters, and the height of the equipment does not exceed 2meters. Figure 4 Shenshi micro-channel reactor device       The projectused the Hangzhou integrated micro-channel reactor to completely overturn theoriginalreaction conditions, and the scale-up experiment of the productionscale proved that the production yield ofthe product was increased by 6-8%. Inaddition, more than 1 million energy costs were saved each year.      HangzhouShenshi's micro-reaction system has outstanding advantages in energy saving,environmentalprotection, efficiency, space, safety, etc., and is anindispensable upgrade replacement product for traditional chemical heatexchange equipment and reaction equipment.

The connection between PCHE and FLNG?With its compact, efficient, reliable, high heat transfer area density, high pressure resistance and low temperature resistance, printed circuit heat exchangers meet the needs of main low temperature heat exchangers for offshore floating natural gas liquefaction. The first choice for the main cryogenic heat exchanger for floating natural gas liquefaction.PCHE's processing technology mainly uses diffusion bonding, which has high heat transfer area density, high compactness and high heat exchange efficiency; extremely high pressure resistance (maximum pressure resistance up to 60MPa), and high and low temperature resistance (-196 ℃ to 900 ℃). Less leakage and high bonding strength; under the same thermal load, its volume and weight are only about 1/6 of the traditional shell & tube heat exchanger.PCHE can be widely used in floating liquefied natural gas production storage and offloading device (FLNG); offshore natural gas liquefaction condenser, regenerator, natural gas regasification evaporator, gas-gas heat exchanger , supercooler, etc. As well as other ocean platforms, floating storage and regasification devices.

How does the intercooler change the efficiency of a gas turbine?In order to improve the thermal efficiency of gas turbines, people have come up with a variety of methods. One of them is an intercooler. In principle, gas turbines are heat engines. The energy comes from the expansion of the air by heat. Therefore, a measure of the energy of the gas turbine is the temperature difference between the air in and out of the combustion chamber The most direct method of this temperature difference is to increase the temperature of the combustion chamber, but the withstand temperature of the combustion chamber and high-pressure turbine is also limited, so the gas temperature cannot be increased without limit. In this case, people do the opposite and reduce the entry into the combustion Chamber air temperature, so that the temperature difference between the two sides of the combustion chamber can be increased without increasing the temperature of the combustion chamber itself. This is how the intercooler works.According to relevant data, intercoolers are generally installed between low-pressure compressors and high-pressure compressors, that is, after the air passes through the low-pressure compressors, and then enters the high-pressure compressors through the intercoolers, the intercooler reduces the air into the high-pressure compressor The temperature of the engine, the compression power consumption of the high-pressure compressor is therefore reduced, and the specific power of the entire unit is improved. Shenshi’s titanium alloy intercooler for marine engines developed by and 1300kW titanium alloy high temperature air and water / sea water plate-fin heat exchanger for marine gas turbines are well used in ships, effectively improving the ship Gas turbine efficiency.

Is PCHE suitable for power generation systems?PCHE is suitable for power generation cycle under high temperature and high pressure!For supercritical CO₂ power generation system:The heat exchange of the current supercritical CO₂ test loop mostly uses PCHE, which is suitable for high working temperature and high working pressure, and has good expansion ability; meanwhile, PCHE is a combination of high integrity diffusion Structured high efficiency heat exchanger. The combination of diffusion makes the heat exchanger resistant to high and low temperatures and excellent mechanical properties, making it the only heat exchanger that can be used in the supercritical CO₂ cycle.For nuclear power plants:Printed circuit board heat exchangers are conducive to improving the thermal management and economic benefits of thermal power stations and nuclear power plants. Its compact size, high temperature and pressure resistance, and high heat exchange efficiency make it the best choice for future power generation heat exchangers.The temperature required for nuclear power is 850 degrees, and PCHE is currently the most heat-resistant heat exchanger; and compared with the traditional shell & tube heat exchanger, PCHE is more reliable and safer.