WXYL Heat Exchange Technology Group is the most powerful silicon carbide equipment manufacturer in China. It provides technologies, solutions, after-sales services and innovative products for users in the chemical, pharmaceutical, pesticide, and new energy fields that require corrosion-resistant equipment to meet their corrosion-resistant requirements. .
WXYL is a leading company in drafting China's national industry standards for silicon carbide heat exchangers, and it is also the only company in China that has the ISO9001 international quality certification for silicon carbide heat exchanger design and manufacturing.
At present, the company has successively obtained more than 70 patents such as silicon carbide double tube sheet heat exchanger, new silicon carbide falling film absorber, new silicon carbide sulfuric acid dilution system and new sulfuric acid concentration system. With these patented technologies, the company has achieved a series of impressive achievements in the development of silicon carbide equipment.
In October 2015, the first domestic non-pressure sintered high-purity silicon carbide heat exchanger with a perfect sealing structure was produced and put into actual production use, and won the national invention patent.
In March 2016, it broke through the foreign technology monopoly and developed China's first double-tube sheet silicon carbide heat exchanger, which won the national invention patent.
In December 2016, China's first set of silicon carbide heat exchanger design and manufacturing enterprise standards was formulated.
In August 2017, it was formally established as the only drafting unit of the silicon carbide heat exchanger industry standard.
In December 2017, the company and the SH Institute of Ceramics, Chinese Academy of Sciences jointly undertook the development and application demonstration of high-performance silicon carbide porcelain heat exchangers, a national key research and development project.
In April 2018, we independently designed the first domestic sulfuric acid recovery device with silicon carbide as the main body, and successfully commissioned it.
In June 2018, silicon carbide heat exchanger products entered the international market and were exported to developed countries such as Europe and the United States.
In 2019, China's market share exceeded 80%, and its export output value exceeded US$50 million. Its products were exported to developed countries such as Europe and the United States.
In 2020, independent research and development and production of silicon carbide pipes will break through the production bottleneck and further expand production capacity.
Silicon carbide material not only has high thermal conductivity, outstanding corrosion resistance, excellent physical properties, high strength and high hardness, high wear resistance, and can meet the stringent standards of the pharmaceutical and food industries, but its overall cost is also better than glass , PTFE, glass-lined, graphite, tantalum. Based on these excellent characteristics of silicon carbide, the WXYL R&D team absorbed foreign advanced technology and developed a variety of silicon carbide equipment by itself.
The double tube plate silicon carbide heat exchanger is the company's original two-way corrosion-resistant double tube plate high performance heat exchanger. It adopts new technologies, new processes and new materials at home and abroad, and is cost-effective. It can greatly improve the overall corrosion resistance of the equipment, the design of the leak detection hole of the support ring, and the abnormal situation of the equipment can be quickly observed, which significantly improves the safety of the equipment. Sex.
This product has three advantages: adopts a two-way double tube plate design, the working pressure of the tube pass reaches 10Kgf/cm⊃2; and the silicon carbide heat exchange area reaches 300 square meters, reaching the international leading level. The product has obtained 5 patents, including 2 invention patents. Products have been widely used in Yangnong Group, Zhejiang Huahai Pharmaceutical, Zhejiang Pharmaceutical Group, Zhejiang Yongtai, Shandong Chemical Industry Research Institute, Tangshan Sanyou Group, Yuntianhua Group, Baili Chemical, Lier Chemical, Sinochem Blue Sky Group, Nearly one hundred well-known enterprises such as Guangzhou Tinci Advanced Materials, Arkema (Changshu) Company, Quzhou Fluorochemicals, Solvay Fine Chemicals, etc.
The silicon carbide sulfuric acid cracker is a microchannel silicon carbide reactor jointly developed by the company and the China Nuclear Energy Research Institute. It can be used at a pressure of 5MPa and 900°C. The product has 3 authorized patents, including 1 invention patent.
According to Xu Pengfei, the Chinese Academy of Nuclear Research has more than ten years of laboratory research experience and basic technology accumulation in the field of iodine-sulfur thermochemical cycle high-temperature reactor nuclear energy production. WXYL is engaged in the design and manufacture of silicon carbide heat exchangers and reactors. Have good industrial engineering experience in system assembly. In order to promote the development of the iodine-sulfur cycle and give full play to the advantages of both parties, the two parties cooperated in the design and processing of the iodine-sulfur cycle silicon carbide sulfuric acid cracker. China Nuclear Energy Research Institute provides the reaction process, process parameters and design requirements of the sulfuric acid cracker. WXYL is responsible for completing process design, key equipment design and manufacturing, entire system assembly, and pre-factory testing within 5 and a half months. After the commissioning of the device is completed and normal operation, the two parties jointly complete the on-site water test and material test acceptance within 3 weeks, and form a formal acceptance report. The device will be applied to the iodine-sulfur cycle nuclear energy hydrogen production device to truly realize the industrialization of nuclear hydrogen production technology.
The silicon carbide falling film evaporator solves the technical problems of the traditional falling film evaporator. It has strong corrosion resistance to corrosive liquids or gases such as concentrated sulfuric acid, chlorine, hydrofluoric acid or hydrobromic acid, thereby improving the efficiency of the falling film evaporator and extending its life. The product has 3 authorized patents.
The silicon carbide falling film evaporator can withstand almost any pH medium due to its strong corrosion resistance. This equipment can evaporate materials with higher concentration and higher viscosity. Since the solution flows in the form of a film in the single-pass evaporator, the heat transfer coefficient is high, the residence time is short, and the material is not easily deteriorated, and it is suitable for processing heat-sensitive materials. At the same time, due to the small liquid retention, the falling film evaporator can operate quickly according to changes in energy supply, vacuum, feed volume, concentration, etc. In addition, since the process fluid only flows under the action of gravity and is not driven by high temperature difference, low temperature difference evaporation can be used.
Using the innovative invention of silicon carbide materials, WXYL has also developed silicon carbide sulfuric acid diluter, silicon carbide sulfuric acid evaporator, silicon carbide falling film absorber, silicon carbide sulfuric acid cracker, silicon carbide sampling tube, silicon carbide thermometer casing, etc. Series of innovative products.
Silicon carbide heat exchanger to meet the harsh process environment
Many processes in industrial production need to be carried out in a high temperature, high pressure and strong corrosive environment. Therefore, there is an urgent need for more efficient corrosion resistance, high temperature resistance and long-term use equipment. Silicon carbide heat exchangers can fully meet these requirements. An excellent choice for harsh process environments.
Silicon carbide heat exchanger is a new type of heat exchanger that uses silicon carbide ceramic material as the heat transfer medium. Because silicon carbide ceramic has excellent characteristics such as corrosion resistance, high temperature resistance, high thermal conductivity, high hardness, and wear resistance, the silicon carbide heat exchanger manufactured by it is more suitable for high temperature, corrosion resistance, high pressure, high-speed air erosion, particle wear, etc. Environment, which also makes it an excellent alternative to graphite heat exchangers, stainless steel heat exchangers, metal tantalum heat exchangers, Hastelloy gold heat exchangers, fluoroplastic heat exchangers and other traditional material heat exchangers. It is used in extreme environments of high temperature, high pressure, strong corrosion and high wear in chemical, pharmaceutical, metallurgical and other industries.
"Silicon carbide heat exchanger is a new type of heat exchanger that uses silicon carbide ceramic material as the heat transfer medium. It can withstand the corrosion of high-concentration sulfuric acid, nitric acid, phosphoric acid, mixed acid, strong alkali, hydrofluoric acid, and strong oxidant. Under normal use at 1300℃ high temperature, it still has super corrosion resistance, permeability resistance and wear resistance under extreme high pressure and high temperature. Moreover, the heat exchanger has strong impact resistance, high-speed airflow resistance, and resistance to various particles Its excellent thermal conductivity can also meet the urgent needs of energy saving, emission reduction and environmental protection. At the same time, it does not pollute the working medium under strong corrosive working conditions, and can also meet the demanding standards of the pharmaceutical and food industries." Xu Pengfei, general manager of Inlawson The introduction said.
Among silicon carbide heat exchangers, tubular silicon carbide heat exchangers are the most widely used. It uses a heat exchange tube made of corrosion-resistant silicon carbide material, which is an ideal choice for heating, cooling and condensing chemically corrosive process media. Typical application media include bromine, sulfuric acid, hydrofluoric acid, nitric acid, hydrochloric acid and other acids, bases, halogenated compounds, salt solutions and organic compounds.
Xu Pengfei said, “Silicon carbide heat exchangers can withstand high-concentration sulfuric acid, nitric acid, phosphoric acid, mixed acids, strong alkalis, oxidants and other strong corrosive raw materials, and can operate under high temperature and high pressure for long periods. It has been used in industrial production in European and American countries. More than 30 years of experience. Especially in the production of hydrofluoric acid, rare and precious metals such as titanium and zirconium are difficult to resist corrosion. This is why silicon carbide is a good choice because it is resistant to hydrofluoric acid. The best material for corrosion."
"In 2017, a large Chinese chemical company that adopted the production process of hydrofluoric acid used heat exchangers of various materials such as titanium heat exchangers, zirconium heat exchangers, graphite heat exchangers and Hastelloy alloys. But these heat exchangers It could not meet their anti-corrosion needs, leakage often occurred and continuous production could not be realized. The annual cost for replacing these equipment exceeded 40 million yuan. So they found WXYL and explained the working conditions and specific requirements in detail. WXYL technicians Aiming at its use conditions, a professional design system is used to provide a set of detailed solutions. The design temperature of the silicon carbide heat exchanger is 180℃, the design pressure is 1.0MPa, and the heat exchange area is 60m⊃2;, effective solution The technical problem of strong corrosion that has been faced before has been solved." Xu Pengfei said.
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