The "Development and Application of Key Technologies for Ultra-High Purity Chemical Distillation" jointly completed by Beijing University of Chemical Technology and Xinjiang Tianye (Group) Co., Ltd. has recently passed the identification of scientific and technological achievements organized by the China Petroleum and Chemical Industry Federation.
The appraisal committee chaired by Academician Shu Xingtian of the Chinese Academy of Engineering believes that this result is highly innovative and has a significant role in promoting scientific and technological progress in related industries. The technology has generally reached the international advanced level.
"Development and application of key technologies for ultra-high purity chemical distillation" is an important research result obtained by the team of Professor Li Qunsheng and Professor Ren Zhongqi of Beijing University of Chemical Technology after 15 years of research. At present, the achievement has been authorized 15 patents, including 7 invention patents, 123 papers published, and 1 monograph published. Application in more than 100 projects of nearly 30 companies in the chemical industry, producing high-purity silicon materials (purity up to 10N grade), high-end polyvinyl chloride (purity of 99.999%), refined vinyl acetate (purity up to 99.995%) and other ultra-high-purity chemicals to meet the needs of ultra-high-purity industrial basic materials in China's electronics, aerospace and other fields.
According to the technical leader of the project, Professor Li Qunsheng, the project has the following technological innovations and features: First, the parameters of corrugation, inclination, and surface are introduced, which breaks through the limitations of the original model with fewer parameters and creates multiple parameters of fluid flow in the filler. model. The second is to invent new structured packings such as packings with wavy lines and double arc changes. The mass transfer efficiency is more than 50% higher than the existing mainstream packings. The third is to establish an "optimal weighting" model applicable to various types of trays, and guide the invention of new types of FGVT trays and guided trapezoidal stereo composite trays (FTCT), which are the optimal configuration of pilot holes, floating valve holes and screen holes. Compared with the original tray, the tray and tray separation efficiency is increased by 30%, and the operating flexibility is increased by about 40%. The fourth is to develop four-level response surface optimization technology in the tower, between towers, between sections, and between devices, optimizing the entire distillation system, reducing energy consumption by 30% -40% compared with similar technologies at home and abroad, and solving ultra-high purity Problems in chemical production technology。