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High temperature filter material is the development direction of industrial textile filter material, and the preparation technology of filter material plays an important role in improving and improving the effect of industrial waste gas dust emission. After years of development, my country's high-temperature filter material industry has made double breakthroughs in theory and practical technology. The promotion of high-temperature filter material preparation technology and application of scientific and technological achievements will help promote the scientific and technological progress of the filter industry and promote the high-quality development of the industry.

On September 20, the "Textile Light" high-temperature filter material preparation technology and application of scientific and technological achievements promotion activities sponsored by the Science and Technology Development Department of the China Textile Industry Federation, the Textile Light Science and Technology Education Foundation, and the China Industrial Textile Industry Association were held in Funing County, Jiangsu Province.


 

      
Li Lingshen, Vice President of China Textile Industry Federation and President of China Industrial Textile Industry Association, Ye Zhimin, Deputy Secretary-General of China Textile Federation and Executive Vice Chairman of Textile Light Science and Technology Education Foundation, Li Guimei, Vice President of China Industry Association, Secretary-General Zhang Chuanxiong, Yu Mucun, Secretary of the Party Working Committee of Fucheng Street, Funing County, and other leaders and guests, as well as industry experts and business representatives attended the event. The activity was presided over by Liu jingxian, secretary-general of the filtering branch of the China industry association and professor of northeast university.
At the meeting, Ye Zhimin, deputy secretary-general of the China Textile Federation and executive vice chairman of the Textile Light Science and Technology Education Foundation, introduced the relevant situation of the Textile Light Science and Technology Education Foundation. As a non-profit foundation of the national textile industry, the Textile Light Science and Technology Education Foundation, under the leadership of the China Textile Industry Federation, cooperates with the Ministry of Science and Technology of the China Textile Federation, professional associations, and education associations to fund public welfare activities of science and technology education in the textile industry and promote Science and technology achievements, teaching achievements, annual public welfare expenditure of 10 million yuan, to contribute to the development of textile science and education.


 

At the meeting, Ye Zhimin issued a donation certificate for Jiangsu Hang Seng Environmental Protection Co., Ltd., a donation unit of "Textile Light.

Technology promotion

In the technical promotion link, 11 experts respectively brought technical reports to promote the preparation technology of high-temperature filter materials and the application of scientific and technological achievements.




 

Spunlace filter material based on ultra-fine denier wet fine filter surface layer
Liu Jingxian, Secretary-General of Filtration and Separation Textiles Branch of China Industrial Textiles Industry Association and Professor of Northeastern University


Innovation points of spunlace filter material for ultra-fine denier wet fine filter surface layer: the fiber diameter of ultra-fine denier fiber surface layer can be less than 1μm; Wet-laid, more uniform mesh and smaller mesh weight, solving the problem of difficult carding of ultra-fine denier fibers; Spunlace reinforcement significantly reduces the pore size of filter material and improves the collection efficiency of fine particles. The diameter of the surface fiber can be finer, making the dust-facing surface layer denser, with higher trapping efficiency and better, the mechanical strength and service life of the filter material are fully guaranteed. Combing difficulty increases with the thinning of fiber diameter, and fibers below 5μm are difficult to comb. Wet laying can perfectly solve this problem, not only laying the net evenly, but also the gram weight can be very low. Perfect solution to the problem of micron and sub-micron fiber carding.

Key Preparation Technology and Industrialization of High Performance Filter Media
Wang Fei, Vice Minister of Technology of Jiangsu Dongfang Filter Bag Co., Ltd.


The advanced preparation technology of PPS fiber anti-oxidation and high temperature resistance modification is shown in the oxidation induction temperature of 484 ℃, the heat resistance of needle punched filter material, the vertical strength of 1090N at normal temperature, the vertical strength of 1125N at 220 ℃ for 24h, and the vertical strength of 1084N at 220 ℃ for 48h.
The advancement of PTFE material refinement and enhancement technology for high temperature resistant filter material is shown in that the film thickness is above 20μm, the filament strength for base cloth is> 4.2cN/den, the length is> 11000m, and the fiber content of membrane crack fiber width <16μm is> 60%.
The advancement of low-damage needling entanglement composite technology of filter material is manifested in the use of elliptical needling needles and new needling entanglement technology to enhance the strength retention rate of the base fabric> 85%.
The advancement of water-repellent and oil-repellent and antioxidant hydrolysis functional finishing technology is shown in that the resin full coating finishing can improve the overall effect of dust removal, with a specific strength of 4.636N/(g/m²), dust removal efficiency 99.998, dust stripping rate 94.4.

High temperature filter material and foaming coating technology
Wang Hong, Associate Professor, Donghua University


Foam coating specific fabric with less liquid, shorten the drying time, reduce costs, bubbles can increase the volume of the coating solution, so that the solution evenly spread to the filter material and other characteristics.
The research contents and schemes of foaming coating technology include: preparation of PTFE foaming coating liquid, preparation of PTFE foaming coating liquid by using PTFE emulsion, foaming agent, foam stabilizer and thickener, and high-speed shear foaming; research of foaming coating process, coating the foaming coating liquid on the glass fiber base cloth by doctor blade coating technology, and curing into a film by two-stage high-temperature drying; the performance test and comparison of the foam coating filter material, the performance test and comparison of the foam coating composite material and the untreated glass fiber base cloth and the film product.

Product development and industrialization of high temperature composite filter materials
He Jianxun, Engineer of Fujian Nanfang Co., Ltd.


With the goal of "developing spunlaced + base cloth + needle-punched high-temperature composite filter material products", a series of new products of high-temperature composite filter material 300~650g/m2 have been developed, with filtration efficiency reaching more than 99.95, filtration resistance ≤ 200pa, and export dust concentration ≤ 10mg/Nm.³.
The innovation point of the project: double carding, double paving, double pre-stab, high-temperature environmental protection filter material production equipment, which synthetically forms the multifunctional fiber layer of the filter material at one time, has a three-dimensional sandwich structure with uniform fiber mesh, no composite folds and strong strength to meet the requirements, innovatively designs a flower-back classification system, solves the problems of impurities and short pile pollution on the cloth surface, can recover effective fibers sucked away due to suction edge, and improve the production rate; the new foam coating technology includes new foam generator, foam coating method and PTFE foam coating self-developed formula; the preparation technology of high temperature composite filter material can improve filtration accuracy and filtration efficiency, reduce filtration resistance and reduce costs.

Preparation and application of fine filter bags for boilers in coal-fired power plants
Chen Fengli, Chairman of Fushun Tianyu Filter Material Co., Ltd.


The design requirements of fine filter material for coal-fired boilers are high efficiency, matching, stability and reliability, and the production emission requirements are better than the national standards. The products should be temperature resistant, corrosion resistant, folding resistant, wear resistant, low operating resistance, stable pressure difference, reduce operating costs and ensure service life. The fine filter material has strong dust catching ability, high filtration efficiency, low running resistance, good matching, strong adaptability and long product life.
The technology is widely used in Beijing Shunyi Xinhao Thermal Power Plant, Baoshan Iron and Steel Co., Ltd. self-owned power plant (350MW), Datang Taiyuan No.2 Thermal Power Plant (200MW), Tongliao Shengfa Thermal Power Co., Ltd. (135MW), Inner Mongolia Fengtai Power Generation Co., Ltd. (200MW), Guangdong Zhanjiang Power Plant (300MW) ultra-clean emission project, China Pingmei Shenma Energy and Chemical Group Co., Ltd.

Finishing Technology of Filter Material and Development of Finishing Solution
Wang Huijun, Engineer of Shanghai Textile Research Institute


Due to the limitation of its fabric structure, woven fabrics and knitted fabrics have many restrictions when they are used as filter materials. Common finishing techniques include water and oil repellent finishing, antistatic finishing, etc.
As a new type of textile filter material, non-woven filter material has been widely used in all walks of life because of its excellent filtration efficiency, high output, low cost, easy to compound with other filter materials and easy processing and molding.
The application of nonwovens in filter media accounts for more than 70% of textile filter media. In order to meet different filtration requirements, various finishing processes need to be carried out, such as calendering or singeing finishing, heat setting finishing, hydrophobic and oil-proof finishing, coating finishing, flame retardant finishing, static elimination finishing, special finishing, etc.




 

Preparation Technology and Industrialization of High Efficiency Dust Removal Filter Material for Cement Kiln Collaborative Disposal
Cai Weilong, Senior Engineer of Xiamen Sanwei Silk Environmental Protection Co., Ltd.


At present, the harmless disposal capacity of waste can not meet the needs of environmental governance, the situation of "garbage siege" is grim, and the environmental problems caused by solid waste pollution are constantly emerging. The realization of waste harmless, reduction and resource disposal is a major problem to be solved in the development of our country.
The preparation technology of high-efficiency dust removal filter material for cement kiln collaborative disposal puts forward the innovative structural design of "three-dimensional asymmetric" filter material, realizes the transformation from "deep filtration" to "surface filtration", and realizes a new breakthrough in the design of filter material products. Breaking through the technical problems of acupuncture and spunlace composite process, the key technology of spunlace filter material industrialization has been developed.

Polytetrafluoroethylene fiber by membrane splitting method
Huang Lei, General Manager of Shanghai Jinyoufluoro Material Co., Ltd.


Film split filament fiber has the characteristics of high tensile strength, less high temperature attenuation (compared with extrusion method), good dimensional stability (good stability of base fabric width, less slippage of base fabric yarn), etc. Film split short filament fiber has the characteristics of environmental protection in production process, controllable fiber fineness and high production efficiency, and is widely used in high temperature flue gas filtration field, wire and cable field and sealing field, it can also be used in the production of non-rejection reactions with the human body and used as medical sutures, membrane cracking PTFE long fiber woven into self-lubricating bearings and other fields.

Building a new type of environmental protection filter material intelligent factory, strengthen the fine management of enterprises
Engineer of Jiangsu Lantian Environmental Protection Group Co., Ltd. Yang Sen


The new intelligent factory of environmental protection filter material includes raw material warehousing, workshop processing, running water assembly, quality inspection, packaging labeling, finished product warehousing and shipping, etc. to further integrate production and informatization to realize informatization of production site; Promote equipment networking and data acquisition automation to realize production automation; Improve the production line equipment with data processing and judgment capabilities, and realize equipment intelligence.
Establish ERP system to realize effective management of the whole supply chain, provide data support for company decision-making, and establish standardized management system; Establish OA system to realize paperless office and mobile office; Establish CRM system to create mobile digital management covering the whole life cycle of sales, marketing and service customers; Establish MES system to break through the management barriers of informatization and automation, realize synchronous management of production data, automatic traceability of production history, linkage of equipment technology and quality, intelligent informatization of equipment, automatic performance management of equipment, automatic reporting of work, etc., and realize transparency and digitization of the production process.

How to Improve the Quality of Nonwovens from Carding Process
Wang Hai, Engineer of Technology Department of Jinlen Needle Cloth (Jiangsu) Co., Ltd.


Jinlun focuses on the design and development of card cloth products. At present, it has three series of products of "diamond, pioneer and spike" in the field of nonwoven. Over the years, it has continuously developed and improved the leading technology and nonwoven carding technology in the field of card cloth manufacturing, providing comprehensive carding solutions for various nonwoven enterprises such as spunlace, needle filtration, hot air and hot rolling.
Gold wheel diamond series card cloth has good combing effect and long service life. It is widely used in high-end non-woven fields such as spunlace and needle filtration. The surface treatment technology of card cloth has the advantages of no burr and fast opening on the edge, good smoothness of working face, no oxide skin on the surface, and has good use effects such as small dimensional damage, good puncture ability of needle teeth, good combing effect, less neps, uniform mesh surface, etc.

Development and application of membrane filter material for blast furnace gas purification
Xu Tao, Deputy Chief Engineer of Sinoma Technology Co., Ltd.


The key technology of coated filter material has the characteristics of high-efficiency and low-resistance PTFE membrane preparation, high-performance substrate preparation, high-temperature coating, etc. The preparation technology of high-efficiency PTFE filter membrane has the characteristics of high expansion degree, controllable pore size and high uniformity. The preparation technology of high-performance substrate pioneered TFM treatment formula and coating process. The glass fiber cloth and composite needle felt coated filter material produced have high filtration efficiency, dust emission within 5mg/nm, and high water resistance, waterproof grade four or more, high strength, high temperature resistance, folding and other characteristics.