Heat Exchanger&Silicon Carbide

Company profile



Wuxi Innovation Technology Co., Ltd. (WXIT)
------Member of Worldwide Specialists in SiC Heat Exchanger Company
   Wuxi Innovation Technology Co., Ltd. is a high-tech company who works for Silicon Carbide Heat Exchanger, where is located in Wuxi City of P.R.C. The company was started its production in 2015 and has successfully delivered more than nine hundred Silicon Carbide Heat Exchangers.

l 2015/05, WXIT started cooperation with Chinese Academy of Science (Shanghai) to research and develop the technology of SI-HX. 

l 2015/10, the first SI-HX was started operation in Zhejiang Huahai Pharmaceutical, it is working well until today.

l 2016/03, the first Silicon Carbide Double-tubesheet Heat Exchanger was started operation in Jiangsu Yangnong Chemical Group Co., Ltd. It is working well until today, and it get Certificate of Invention Patent.

l 2016/09, over than one hundred SI-HX is worked on job site.

l 2016/12, the first company standard of SI-HX in China was enacted by WXIT.

l 2017/03, the first SI-HX as an evaporator of sulfuric acid concentration system was operated.

l 2017/08, the first SI-HX up to 80m2 under 16barg steam in shell side was produced.

l 2017/09, get the request from state to draft of state industry standard of SI-HX.

l 2017/12, over than thirty patent inventions about SI-HX is applicated.

l 2018/05 get certificate ISO 9001: Design and manufacture of SI-HX from SGS.


   As the only company in China and in the world offering over than 300m2 or the pressure up to 16barg SI-HX, we can provide the best the most cost-effective solutions. We can now solve virtually any corrosion problem for the chemical process industries.


Silicon Carbide:
Silicon Carbide is a single phase, pressure less sintered ceramics with high purity, fine grain, low porosity and etc. the silicon carbide heat exchanger can be used as an excellent substitute for graphite, stainless steel, tantalum, Hastelloy, fluoroplastic and other traditional material parts in the industry such as chemical engineering, pharmaceutical and metallurgy that have high temperature, high pressure, high corrosion and high abrasion such extreme conditions.

Silicon-Carbide heat exchanger has super performance regarding thermal conductivity and comprehensive anti-corrosion against acid and alkali. It can replace equipment made of expensive metal like Tantalum. It can work well under high pressure and temperature, where graphite cannot work. It is especially suitable for cool HF or hydrogen bromide gas.


Description:
Silicon carbide heat exchangers for corrosive media are used in chemical (pharmaceutical, pesticide, fine chemical, organic, inorganic) process systems for heat exchange of strong corrosive media. A silicon carbide heat exchanger can withstand highly corrosive mediums, such as high concentrations of sulfuric acid, nitric acid, phosphoric acid, hydrobromic acid, hydrofluoric acid, sulfonic acid, mixed acid, strong alkali, organic solvent, oxidizer and other highly corrosive acids. The pressure free sintered silicon carbide material is the only ceramic material that cannot be corroded by hydrofluoric acid. Our ultra-large silicon carbide heat exchanger can withstand a vapor pressure of 16kg and a temperature of 210ºC. The product uses double tube sheets, with the carbon steel tube sheets featuring a high pressure and high temperature resistance. The other tube sheets use a special carbon steel (PTFE reinforced carbon steel) to eliminate deformations caused by an oversized PTFE sheet. In addition, each silicon carbide tube is sealed respectively, using a sealing nut, which meets the sealing requirements for a large tube sheet and facilitates equipment maintenance.


Parameters:
Maximum design temperature: 300ºC Maximum temperature in-service: 250ºCMaximum design pressure: 1.6MPaMaximum pressure in-service: 1.3 MPaMaximum heat transfer area: 300m2 Maximum heat transfer area in-service: 70m2Maximum design diameter: 1200mmMaximum diameter in-service: 900mmModel selection of silicon carbide heat exchanger for corrosive media:



φ14mm
Heating Exchanging Area per φ14mm OD Tubes
 

φ19mm
Heating Exchanging Area of φ19mm OD Tubes

The following are the results of different corrosion resistance levels in different solutions:


We use ASPEN software and our extensive practical experience in order to ensure the products are smaller in size and cost-effective, as well as allow us to guarantee the technical performance.

Taking high temperature, high pressure and high hazard medium environments in the industry into consideration, we have designed a highly reliable seal structure (the invention patent for the double tubesheets silicon carbide heat exchanger) to ensure that there is no cross contamination between the treated medium and the service medium.

We use pressure free sintered silicon carbide materials developed by the Chinese Academy of Sciences for production that feature ultra-fine particles and a high purity.

We use PTFE & fluorine rubber for sealing and each pipe is double sealed.

We use the polytetrafluoroethylene & glass fiber reinforced tube sheet and cover to ensure that the silicon carbide tube installed on the PTFE tube sheet won't break through deformation. In addition, due to the adequate compression force of the sealing ring, the equipment will not leak when the temperature changes.

We use PTFE baffles and pull rods to protect each silicon carbide tube from abrasion.

Backed by international, advanced technology and extensive service experience,we use three gaskets and double sealing technology to ensure that the equipment will operate normally, even after long term usage.

Special tube sheet structure: there is an outlet on the tube sheet to ensure that the machine will discharge the water and materials on the shell and tube side when the equipment shuts down. This design prevents damage to the silicon carbide tube caused by frozen water inside, making it more conducive to overhaul.