"Boiler Air Pollutants Emission Standards" Will Promote Rapid Growth Of Domestic Filter Market

In the < < p > emission standard for boiler air pollutants >, it is recommended that bag dust removal and electric bag composite dust removal be included in the recommended a href= "http://www.91se91.com/news/index_c.asp" > Technology > /a >. The popularity of this technology has been appealed by the industrial textiles industry and the chemical fiber industry for many years. Most of the materials used for bag type dust removal are fiberglass, and the filter materials made of high-tech fibers such as aramid and PTFE have not been widely used by downstream enterprises. The high price makes the power plants and other enterprises prohibitive. Under the state's policy of increasing air pollution control, it is hoped that the appeal of the state subsidized bag type dust removal industry or subsidies for power plants to use bag type dust removal products will continue to rise. < /p >
In the < p > air pollutant emission standard for boilers, it is recommended that bag dust removal and electric bag composite dust removal be included in the recommended technology for boiler dedusting. The popularity of this technology has been appealed by the industrial textiles industry and the chemical fiber industry for many years. At the beginning of this year, Li Guimei, Secretary General of China Industrial Textiles Industry Association, said that the future supporting policy of bag type dust removal industry will definitely come out, but not yet. Li Guimei said at that time that the Ministry of industry and Commerce may encourage the establishment of some demonstration bases and platforms this year to promote performance improvement and better promotion of bag type dust removal products. < /p >
< p > bag type dust removal materials are mostly composite glass fiber, aramid, polytetrafluoroethylene and other high-tech fibers, and the filter material has not been widely used by downstream enterprises. The high price makes the power plants and other enterprises prohibitive. Under the state's policy of increasing air pollution control, it is hoped that the appeal of the state subsidized bag type dust removal industry, or subsidies for power plants to use bag type dust removal products, will continue to rise. Wang Wei, deputy director of the consumer goods industry department of the Ministry of industry and commerce, said that the Ministry of industry and commerce is now working hard to develop the standard of bag type dust removal. However, the Ministry of industry and Commerce will not subsidize specific projects, but it will strive for some support for innovative technologies, public service facilities and platform construction. < /p >
< p > < strong > < a > href= > http://www.91se91.com/news/index_c.asp > high standard < /a > good products are needed > /strong > /p >
Compared with foreign environmental standards, the emission standards of < p > air pollutants emission standards for boilers are quite strict. Taking sulfur dioxide as an example, the limit of sulphur dioxide emission of newly built boilers in China is 100 milligrams per cubic meter. In the compilation instructions of "emission standard for air pollutants in thermal power plants", it is pointed out that the 2001/80/EC directive of the European Union requires that the discharge concentration of the new large-scale combustion device must be less than 200 milligrams per cubic meter, and the new emission limit specified in the United States in 2005 will be equivalent to 184 mg per cubic meter. < /p >
< p > we can see that the emission limits of sulfur dioxide in China are more stringent than those in developed countries such as the European Union and the United States. Moreover, in the preparation of air pollutants emission standards for boilers, it is recommended that bag dust removal and electric bag composite dust removal be included in boiler dedusting as recommended technology. This means that the upgrading of China's dust removal technology should also be aligned with foreign countries, upgrading the quality of filter bags, and using higher material filter materials to meet the requirements of the new standard. The long-term policy opportunities for new filter media and high-performance fiber industry are just around the corner. < /p >
< p > single electric dust removal has been criticized. According to experts, bag filter is superior to electrostatic precipitator in ultra fine dust capture. For dust particles less than 10 m, the efficiency of electrostatic precipitator is only about 60%, and the efficiency of bag filter for particle size of 1 m is also 98% to 99%. At the same time, the bag filter is not affected by the specific resistance of the dust, and is not affected by the variety of coal combustion. The dust removal efficiency can reach more than 99.99%. In addition, the dust layer on the surface of the filter bag can neutralize acid gas in the flue gas, which plays an auxiliary role in desulfurization and removal of dioxins. < /p >
< p > however, in the high temperature filter industry, most of the fiberglass filter material used before has a fast aging degree and poor flexural performance, and the single glass fiber filter material can not meet the requirements. Polyimide, PTFE and other new filter bags because of the high price, the current share is too low. However, with the improvement of industrial high temperature exhaust emission standards, the process of aramid fiber instead of glass fiber will undoubtedly be accelerated. Filter quality will be greatly improved in the standard constraint. Professor Sun Xi of Northeastern University believes that in the field of filter material industry, quality system and relevant standard system need to be improved. Such related technology can make progress. < /p >
< p > < strong > rich < a href= > http://www.91se91.com/news/index_c.asp > Filter > /a > for choice > /strong > /p >
< p > the varieties that can be applied to high temperature filter materials are very rich. There are common glass fiber filter material, coated glass fiber filter material, PPS filter material, P84 filter material, PTFE fiber filter material and high temperature composite material filter material. The ordinary glass fiber filter material and the dust collector are of high cost, and the service life of the filter bag is generally only about 1 years. Using membrane filter media and P84 filter material, the price of filter bag is high, the price of filter bag often exceeds the cost of the dust collector body, and the service life is relatively longer, which is usually 2~3 years. In order not to affect the normal production and environmental protection standard discharge of the equipment as far as possible, and then consider the economic factors, the filter bags of the domestic high-temperature bag filter mostly use microporous membrane to filter filter material (membrane filter material) and P84 filter material (polyimide). < /p >
Under the policy stimulus and the actual demand, the domestic related enterprises are ready to fight. All kinds of fibers and industrial enterprises are ready for P. Shandong Tai He new product leading aramid fiber, which can be used as high temperature filtration fiber, is favored by environmental protection enterprises because of its high temperature resistance and non combustion performance in air. The high temperature dust removal filter bag made of aramid fiber has been widely applied in cement, steel and other fields. At present, the company's sales of aramid fiber for high temperature filter material is nearly billion yuan. < /p >
< p > Shenzhen Hui Cheng is the main supplier of bag filter consumables, its high performance fiber material polyimide technology barrier is high, import substitution opportunity is obvious. < /p >
< p > the Shanghai Mstar Technology Ltd is mainly producing polyphenylene sulfide fiber and its products. According to their research, with the popularization of the technology of "electric bag integration", polyphenylene sulfide filter materials are widely encountered in the power bag dust collector project of power plants, resulting in excessive ozone production due to the electric field, thereby oxidizing the problem of polyphenylene sulfide fiber and shortening the service life of the filter bag. At present, a feasible solution is to mix a certain proportion of polytetrafluoroethylene chopped fibers and use polytetrafluoroethylene or blended fabric in the filter material layer. < /p >
There are still some defects in filter media made by single P high performance fiber. Under extreme conditions, composite filter material shows higher performance. Composite filter material is mainly used for flue gas temperature fluctuation, ultra high temperature, and other special occasions. The creativity of the composite technology is to significantly improve the temperature resistance of the filter material, and improve the comprehensive properties such as corrosion resistance, oxidation resistance and strength of the filter material, and at the same time reduce the cost. < /p >
The Xiamen three dimensional silk environmental protection Limited by Share Ltd specializing in the production of filter media recently invented a composite microporous filter material, including the base cloth layer, the upper adhesive layer attached to the upper side of the base cloth layer and the lower attachment layer attached to the lower side of the base cloth layer. The base layer is a polyimide short yarn base cloth, a polysulfonamide short yarn base cloth and a polytetrafluoroethylene filament fabric. The upper layer is a mixture of short polysulfone staple fiber and polyimide staple fiber, the lower adhesive layer is a pure polysulfonamide short fiber, and the upper and lower attachment layers are laid on the two sides of the base cloth after being spun together, and the needles are combined with needles, spunlace or two processes. < p > The filter material has the characteristics of high temperature resistance, corrosion resistance, low production cost and high filtration precision, and is especially suitable for dust removal treatment of high temperature flue gas in cement kiln. < /p >