"Textile Light" filtration and separation textile technology achievements popular

"The 13th Five-Year Plan for Science and Technology Progress of the Textile Industry " proposes to promote 100 advanced applicable technologies in the whole industry, 5 of which involve the promotion of new filter materials, including breakthrough bag type high temperature filter processing technology, and application by 2020. The proportion has been increased to more than 20%; the development of new PPS fiber filter materials for ultra-fine dust filtration such as PM2.5 and PM10 will reach 30% by 2020. In order to accelerate the promotion and application of new technological achievements in the field of filtration and separation of industrial textiles , the establishment of a new technology exchange platform for the industry, the Science and Technology Development Department of China National Textile and Apparel Council, China Industrial Textile Industry Association and Textile Light Technology Education Foundation On-site promotion activities of the “Textile Light” filtration and separation textile technology and application key results were jointly held in Suining County, Jiangsu Province on November 14. Li Lingshen, vice president of China National Textile and Apparel Council, president of China Industrial Textiles Industry Association, deputy secretary general of China Textile Association, director of finance department, and deputy director of Textile Light Technology Education Foundation, Ye Zhimin, and other industry leaders, as well as from filtering and More than 100 people from the enterprise technology and management personnel of the separation industry, and other technical and management personnel of relevant textile enterprises, universities and scientific research institutions attended the event.

In his speech, Li Lingshen said that the field of textiles for filtration and separation is a field with high technical content. Technology is the driving force for the development of the industry. The promotion of scientific and technological achievements of "Textile Light" will certainly promote the development of the industry. Ye Zhimin said in his speech that the promotion is the sixth promotion campaign supported by the Textile Light Technology Education Foundation this year. The technical achievements are jointly screened by the China Textile Association and the China Association for Industry and Industry, in line with the needs of the industry. Technology promotion will play an important role in improving product quality , reducing pollution and improving efficiency.

During the event, a total of 8 new technologies for filtration and separation textiles were recommended, involving technologies such as ultra-low emission of flue gas, bag dust removal, filter material production, filter bag materials, filter material preparation, and high-performance fiber preparation. The project won the “Textile of Light” China Textile Industry Federation Science and Technology Award. In addition, experts from the downstream steel and cement industries exchanged ideas on the ultra-low emission technology and application of fine particles in steel furnaces and the application of bag filters in controlling particulate emissions from the cement industry.

Result 1: Key technologies and industrialization of high performance functional filter materials

Promoted by: Jiangsu Oriental Filter Bag Co., Ltd., Donghua University

Achievements: The project starts from China's dust filtration and protection of the atmospheric environment. It studies high-performance fiber dry non-woven molding, low-impact needle-punching hydroentanglement and functional finishing technology, breaking through high filtration efficiency, low resistance and long life. The key technologies for the industrial application of high temperature resistant filter materials meet the requirements of large-scale promotion and application of domestic thermal power and steelmaking enterprises. The research content of the subject mainly includes three aspects: breaking through the key technology of high-temperature filter material low-damage acupuncture reinforcement and acupuncture combined with hydroentanglement, improving the physical and mechanical properties of the final filter material; breaking through the full-coated resin finishing filter material The key technology makes the surface of the filter fiber form a complete continuous high temperature resistant resin film, which improves the high temperature oxidative hydrolysis and anti-condensation performance of the filter material, prolongs the service life; studies the fine treatment technology of the filter material surface, and further improves the high temperature resistant filter Dust removal efficiency of materials. The project has completed all the research contents proposed in the task book, and promoted the application of industrialization results in combination with market demand. It has obtained a series of technological innovations, applied for 5 national invention patents, and all 5 invention patents were authorized, and formed 2 related products and test method standards.

Result 2: Polyphenylene sulfide (PPS) spunbond acupuncture and spunlace nonwoven filter material complete technology

Promoted by: Foshan Sule Special Materials Co., Ltd., Dalian Huayang Chemical Fiber Engineering Technology Co., Ltd.

Achievements: All production processes of the project are concentrated in the same enterprise, which greatly reduces production processes and equipment, saves labor and reduces costs. The product consists of 100% polyphenylene sulfide continuous filament, which has a strong attenuation and a service life of more than 4 years. This production technology adopts the advanced combination of acupuncture and spunlace in the process of reinforcing the fiber mesh. The fiber of the product is well entangled, the appearance is flat, and the wear resistance is excellent. The interior of the polyphenylene sulfide spunbond filter material is composed of four layers of fiber mesh, and the fiber fineness of each layer of the fiber web can be independently adjusted to achieve a special filtering effect of gradient filtration. The windward side of the filter material is composed of fine fibers (1 to 1.5 dtex) and has high filtration precision. The leeward side of the filter material is composed of coarse fibers (6 to 10 dtex) and has good gas permeability. By using a fiber with different denier to form a gradient structure, the product has excellent performance of high filtration precision and low filtration resistance. It has good effect in the field of high-temperature exhaust gas dedusting, and has obvious social and environmental benefits.

Result 3: Key technology and application of three-dimensional asymmetric fluorine/ether composite filter

Promotion unit: Xiamen 3D Silk Environmental Protection Co., Ltd.

Results introduction: This project is aimed at the characteristics of domestic coal-fired boiler filter material application environment, and deeply studied the failure mechanism of PPS filter material in application. Through the research of PPS fiber and PTFE fiber blending technology, the fiber with different fineness is used in the filter material. The cross section is in a gradient distribution, which constitutes a three-dimensional asymmetric filter material structure design, which effectively overcomes the contradiction between efficiency and resistance. In the filter material finishing technology, the “anti-oxidation modification of nano-particles” and “surface foaming” have been developed. “Two unique coating technologies” form a layer of anti-oxidation nano-particles and a protective layer of Teflon on the surface of the filter material, which significantly improves the performance of filter materials such as wear resistance, oxidation resistance and acid condensation resistance. Improve the service life of the filter material, effectively solve the problem of filter material selection for coal-fired boiler bag dust removal.

Result 4: Key technologies and industrialization of dry spinning polyimide fiber preparation

Promoted by: Donghua University, Jiangsu Aoshen New Materials Co., Ltd., Jiangsu Aoshen Group Co., Ltd.

Achievements: The project adopts dry spinning technology, establishes the forming theory of PI fiber, realizes the technology integration of technology and equipment, and builds the world's first dry spinning PI fiber 1000t/a production line with five innovation points. First, the new principle and new method of dry spinning forming "reactive spinning" were proposed for the first time in the world. Secondly, the polymerization process, the molecular weight of the polymer and its distribution control method were established, and high molecular weight and high uniformity were realized. The stable synthesis of spinning solution; the third is to invent the key technology of dry spinning to prepare polyimide fiber precursors to achieve high efficiency recovery of solvent; the fourth is to establish the temperature and stress on the fiber condensed structure and micro The influence relationship of defects has overcome the key technology of integration of “cyclization-draw” process and achieved effective control of material structure performance. Fifth, it independently developed the first set of dry spinning polyimide fiber production equipment in the world. The process and equipment are synchronously coordinated between the processes of polymerization-homogenization-dry forming-cyclization drawing-heat treatment. The project is used as a high-temperature resistant filter material and plays an important role in the treatment of atmospheric pollution such as PM10 and PM2.5 generated by coal-fired, cement production, waste incineration and other industries. It has been promoted and applied to high-temperature filter materials such as cement, electric power and steel. And special protection areas. The successful industrialization of heat-resistant PI fiber not only breaks the monopoly of foreign products, but also participates in international competition with obvious technical level and cost advantage, and promotes the leap-forward development of high-performance fiber in China.