In the beginning of November, the SD paraffin hydrogenation catalyst independently developed by the China Petroleum and Petrochemical Research Institute was successfully used in the 200,000 tons/year high-pressure wax hydrogenation unit of Fushun Petrochemical. The No.58 full-refinery wax product produced by the device, Saybolt color 30, and light stability 3, all the indicators have reached the requirements of the technical agreement indicators, and the product properties all meet the Fushun petrochemical paraffin product factory requirements.
In 2010, after the relocation of the No. 1 Oil Plant of Fushun Petrochemical Company to the No. 2 Oil Plant, a 200,000-ton/year high-pressure wax hydrogenation unit replaced the hydrogenation catalyst. According to the characteristics of Fushun Petrochemical high-pressure paraffin wax and microcrystalline wax hydrogenation, Daqing Chemical Research Center of Petrochemical Institute optimized and improved the preparation process of SD paraffin wax hydrogenation catalyst so that the prepared catalyst can be used under conditions of high airspeed and low hydrogen to oil ratio. Quality meets requirements. In September 2012, a 200,000-ton/year high-pressure wax hydrogenation unit completed the relocation of the plant. In October, the catalyst loading and successful start-up were completed.
In 2005, Fushun Petrochemical Company built the world's largest and only domestic high-pressure paraffin/microcrystalline wax hydrogenation unit. The hydrogenation catalyst has been used in the petrochemical hydrogenation catalyst developed by the petrochemical industry and achieved 54#, 56#, and 58. #, 60 #, 64 #, 66 # paraffin and 70 # microcrystalline wax switching production, product quality to the United States FDA food grade paraffin wax quality standards.
Twisted Tube Heat Exchanger is to strengthen the turbulence of the flowing gas/fluid, so that the gas and the tube wall contact thoroughly. In addition to enhancing heat transfer, the twisted tube heat exchanger also has the advantages of reducing scaling, self-supporting between tube bundles, no baffle plate elements and so on.
With that being said, novel Twisted Tube Heat Exchanger is much more efficient than conventional tubular heat exchanger, or Shell And Tube Heat Exchanger. Twisted tube heat exchangers are also used in applications where the fluids are corrosive or contain particulates, as they are better able to handle these conditions than other types of shell and tube heat exchangers or Air Heat Exchanger.
Twisted tube heat exchangers are constructed from a series of twisted tubes arranged around a central tube. The tubes are twisted in such a way that the fluid will change direction multiple times as it passes through the exchanger. This increases the turbulence of the fluid and creates a larger surface area for the heat exchange, which increases the efficiency of the exchanger.
The shell is usually made from a thick metal such as carbon steel, which increases the durability of the exchanger.
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