■ editor's note:
Recently, the results of science and technology awards of Jiangsu Province in 2019 were announced. 273 projects won provincial science and technology awards, including 45 first prizes, 81 second prizes and 147 third prizes. In addition, 8 enterprises won the provincial enterprise technology innovation award, and 7 foreign experts won the Provincial International Science and Technology Cooperation Award. These award-winning projects reflect the landmark achievements made by Jiangsu Province, which has been in the forefront of high-quality development, around the construction of an independent and controllable modern industrial system and in-depth promotion of the construction of innovative provinces. This newspaper will launch relevant project reports one after another for the readers.
Molecular sieve membrane "combination fist" solves the problem of energy conservation and emission reduction. The annual production and use of organic solvents in China's process industry exceeds 100 million tons. How to reduce the cost of organic solvent production and realize energy saving and emission reduction in the application process? Nanjing University of technology won the first prize of science and technology award of Jiangsu Province in 2019 - "integrated technology of large-scale preparation of high-performance molecular sieve membrane and membrane separation and dehydration", which provided a "combination fist" for solving this problem, making China become a country with this complete set of technology after Japan and Germany. "To reduce the cost of organic solvent production and realize energy saving and emission reduction in the application process, new separation technology is urgently needed." Professor Gu Xuehong, team leader of the award winning project and deputy director of the national special separation membrane engineering technology research center of Nanjing University of technology, introduced that the membrane separation technology with molecular sieve membrane as the core can realize the low energy consumption separation of solvent / water azeotropic system, avoid pollutant emissions, and promote energy conservation and emission reduction in solvent production and circulation process. "The molecular sieve membrane is like a sieve, which can separate molecules of different sizes, but the mesh size is very small, and the pore size is less than 1nm." Gu Xuehong explained that the integrated technology of large-scale preparation of high-performance molecular sieve membrane and membrane separation dehydration is mainly used for the efficient separation of organic solvent and water to replace the traditional distillation technology. Supported by the National 863 and 973 programs, the National Natural Science Foundation of China and the special fund for achievement transformation of Jiangsu Province, the project aims to realize the independent research and development and industrial application of pervaporation membrane materials. It has carried out a series of innovative researches and developed the integrated technology of large-scale preparation of high-performance molecular sieve membrane with independent intellectual property rights and membrane separation and dehydration. The permeate flux of membrane products is The cost of tubular membrane module is 20% lower than that of similar products in foreign countries, and the energy consumption of solvent dehydration and separation is 50% lower than that of conventional methods, which promotes the large-scale industrial application of molecular sieve membrane and realizes the engineering of hollow fiber molecular sieve membrane for the first time in the world. According to reports, the research project has promoted the technological upgrading of process industry, and has broad application prospects in chemical industry, medicine, renewable energy and other fields. The related achievements have obtained 26 invention patents authorized by China, 2 invention patents authorized by Japan, 1 invention patent authorized by Europe, 1 invention patent authorized by the United States, 4 software copyrights and 26 academic papers. "The project achievements have been successfully applied in the production and reuse of more than 10 kinds of solvents, and more than 200 sets of industrial devices have been popularized, which has produced significant economic and social benefits." Gu Xuehong introduced that in the past two years, the product sales volume of this achievement has reached more than 100 million yuan, adding more than 90 million yuan of economic benefits for the eight application enterprises counted, and about 2 billion yuan of economic benefits for all application units. The project also has a high international influence. It has carried out strategic cooperation with many companies in the United States and Germany, and its products have been applied to the international market. (Xinhua Daily)