There are many ways of dust removal, according to the principle of different can be generally divided into electrostatic dust removal, liquid dust removal, filter bag dust removal, now the application of the most is the bag filter and electric dust collector.
At present, the research and development of electric precipitator are mainly focused on the following aspects: universal resistance electric precipitator technology, mobile electrode electric precipitator technology, membrane electric precipitator technology, laminar flow technology. Electrocoagulation technology. Filter bag dust removal according to the different pressure, can be divided into positive pressure dust removal and negative pressure dust removal, but at present our country generally use negative pressure dust removal. There are pulse jet type, long bag low pressure pulse type, chamber ejector pulse type, filter pulse jet type, flat bag pulse jet type, rotary reverse blow type, air box pulse type and other structural forms.
There is a huge demand for cloth bag filter in our country. China's "twelfth five-year plan" has put forward a higher demand for environmental protection, and more filtration materials will be applied in water, gas, sound and slag. In the field of dust and dust treatment, bag dust removal is widely used at home and abroad, accounting for 80% of the dust removal equipment, because of its high dust removal efficiency, no secondary pollution and easy recovery of dry materials. The iron and steel industry is one of the main sources of air pollution. China's steel output has exceeded 300 million tons. According to baosteel's application of bag-type dust removal, 21 million square meters are needed, and 6 million square meters of filter material is replaced every year after the conversion.
Cement industry: bag dust removal has absolute advantage
During the 11th five-year plan period, China's cement output increased by 11.9% annually. According to the 12th five-year development plan of cement industry, during the 12th five-year plan period, with the accelerated transformation of economic development mode, the total cement demand in the domestic market will gradually change from high-speed growth to steady growth. It is predicted that the annual growth of cement demand will be 3% to 4%, and the domestic cement demand will be about 2.5 billion tons by 2015. In the cement industry, because there are kiln head and kiln tail, and the temperature difference between the two is very far, so in the selection of dust collector can not be made the same. Generally speaking, electrostatic precipitators are preferred for kiln heads and bag-type precipitators for kiln tails and other low-temperature parts. This is because the dust collected by bag collectors is actually cement concentrate, which generates revenue for the company. There is also a trend in recent years, however, that is the cement industry's new 4000 tons/day, 5000 tons/day, 10000 tons/day and 12000 tons/day production line kiln head size and preheater mostly USES the bag filter, across all USES the bag filter, single handle air volume from hundreds of thousands of m3 / h to millions of m3 / h, there are a lot of cement enterprises to transform electrical precipitator in service for bag filt
According to the ministry on the cement industry guidance of energy saving and emission reduction requirements, by the end of the 12th five-year national cement particle emissions to reduce by 50% in 2009, 2010-2015 clear existing cement kiln bag filter instead of electrostatic precipitators (low pressure pulse filter), certainly for the next few years bag filter in the growth of the cement industry laid a good foundation. Since the application of bag precipitators in the cement industry has accounted for the majority of the market, the main growth of bag precipitators will come from the increase of cement production capacity nationwide. During the 12th five-year plan period, with the steady growth of total cement demand in the domestic market, the application of bag precipitators in the cement industry will also grow steadily.
Waste incineration industry: bag dust removal is the only option
At present, China is facing great pressure of urban waste disposal. According to the statistics and projections of the ministry of environmental protection, China's annual output of municipal garbage will be 152 million tons in 2010, 179 million tons in 2015 and 210 million tons in 2020, and the annual growth rate of garbage output will reach 3.29% from 2010 to 2020.
Compared with other municipal waste treatment methods, waste incineration has the advantages of good capacity reduction, thorough disinfection, reduction (or elimination) of the environmental impact of subsequent disposal process, conversion of waste into treasures, and small area of incineration plant. The national development and reform commission (NDRC), in its national plan on climate change, explicitly encourages the construction of "waste-incineration power plants in economically developed areas with scarce land resources". "Vigorously research, develop and promote the use of advanced waste incineration technology, improve the level of domestic production, effectively reduce costs, and promote the industrialization of waste incineration technology". According to article 7.3 of "pollution control standard for household waste incineration" (gb18485-2001), the dust removal of household waste incinerator must adopt bag-type dust collector. This is why the use of bag filters in the waste power industry is 100%. However, in the process of incineration, the flue gas produced by waste has the characteristics of great harm, high moisture content, high and low temperature interoccurrence, fine dust particles, strong corrosion, and put forward high requirements for the performance of dust removal equipment. In recent years, the technology of bag dust collector has been well adapted to the dust condition of waste incineration and successfully overcome the above difficulties. The particulate matter emission concentration of some systems is 2.3 -- 4.0mg/Nm3, and the dioxin emission concentration is 0.018 -- 0.040ngTEQ/Nm3. The equipment resistance is stable in the range of 1300 -- 1800Pa, the filter bag life can reach more than 3 years, and the economy is significantly improved.
There are many ways of dust removal, according to the principle of different can be generally divided into electrostatic dust removal, liquid dust removal, filter bag dust removal, now the application of the most is the bag filter and electric dust collector.
At present, the research and development of electric precipitator are mainly focused on the following aspects: universal resistance electric precipitator technology, mobile electrode electric precipitator technology, membrane electric precipitator technology, laminar flow technology. Electrocoagulation technology. Filter bag dust removal according to the different pressure, can be divided into positive pressure dust removal and negative pressure dust removal, but at present our country generally use negative pressure dust removal. There are pulse jet type, long bag low pressure pulse type, chamber ejector pulse type, filter pulse jet type, flat bag pulse jet type, rotary reverse blow type, air box pulse type and other structural forms.
There is a huge demand for cloth bag filter in our country. China's "twelfth five-year plan" has put forward a higher demand for environmental protection, and more filtration materials will be applied in water, gas, sound and slag. In the field of dust and dust treatment, bag dust removal is widely used at home and abroad, accounting for 80% of the dust removal equipment, because of its high dust removal efficiency, no secondary pollution and easy recovery of dry materials. The iron and steel industry is one of the main sources of air pollution. China's steel output has exceeded 300 million tons. According to baosteel's application of bag-type dust removal, 21 million square meters are needed, and 6 million square meters of filter material is replaced every year after the conversion.
Cement industry: bag dust removal has absolute advantage
During the 11th five-year plan period, China's cement output increased by 11.9% annually. According to the 12th five-year development plan of cement industry, during the 12th five-year plan period, with the accelerated transformation of economic development mode, the total cement demand in the domestic market will gradually change from high-speed growth to steady growth. It is predicted that the annual growth of cement demand will be 3% to 4%, and the domestic cement demand will be about 2.5 billion tons by 2015. In the cement industry, because there are kiln head and kiln tail, and the temperature difference between the two is very far, so in the selection of dust collector can not be made the same. Generally speaking, electrostatic precipitators are preferred for kiln heads and bag-type precipitators for kiln tails and other low-temperature parts. This is because the dust collected by bag collectors is actually cement concentrate, which generates revenue for the company. There is also a trend in recent years, however, that is the cement industry's new 4000 tons/day, 5000 tons/day, 10000 tons/day and 12000 tons/day production line kiln head size and preheater mostly USES the bag filter, across all USES the bag filter, single handle air volume from hundreds of thousands of m3 / h to millions of m3 / h, there are a lot of cement enterprises to transform electrical precipitator in service for bag filter.
According to the ministry on the cement industry guidance of energy saving and emission reduction requirements, by the end of the 12th five-year national cement particle emissions to reduce by 50% in 2009, 2010-2015 clear existing cement kiln bag filter instead of electrostatic precipitators (low pressure pulse filter), certainly for the next few years bag filter in the growth of the cement industry laid a good foundation. Since the application of bag precipitators in the cement industry has accounted for the majority of the market, the main growth of bag precipitators will come from the increase of cement production capacity nationwide. During the 12th five-year plan period, with the steady growth of total cement demand in the domestic market, the application of bag precipitators in the cement industry will also grow steadily.
Waste incineration industry: bag dust removal is the only option
At present, China is facing great pressure of urban waste disposal. According to the statistics and projections of the ministry of environmental protection, China's annual output of municipal garbage will be 152 million tons in 2010, 179 million tons in 2015 and 210 million tons in 2020, and the annual growth rate of garbage output will reach 3.29% from 2010 to 2020.
Compared with other municipal waste treatment methods, waste incineration has the advantages of good capacity reduction, thorough disinfection, reduction (or elimination) of the environmental impact of subsequent disposal process, conversion of waste into treasures, and small area of incineration plant. The national development and reform commission (NDRC), in its national plan on climate change, explicitly encourages the construction of "waste-incineration power plants in economically developed areas with scarce land resources". "Vigorously research, develop and promote the use of advanced waste incineration technology, improve the level of domestic production, effectively reduce costs, and promote the industrialization of waste incineration technology". According to article 7.3 of "pollution control standard for household waste incineration" (gb18485-2001), the dust removal of household waste incinerator must adopt bag-type dust collector. This is why the use of bag filters in the waste power industry is 100%. However, in the process of incineration, the flue gas produced by waste has the characteristics of great harm, high moisture content, high and low temperature interoccurrence, fine dust particles, strong corrosion, and put forward high requirements for the performance of dust removal equipment. In recent years, the technology of bag dust collector has been well adapted to the dust condition of waste incineration and successfully overcome the above difficulties. The particulate matter emission concentration of some systems is 2.3 -- 4.0mg/Nm3, and the dioxin emission concentration is 0.018 -- 0.040ngTEQ/Nm3. The equipment resistance is stable in the range of 1300 -- 1800Pa, the filter bag life can reach more than 3 years, and the economy is significantly improved.
As public attention more and more high, the future waste incineration exhaust gas purification and waste incineration power generation industry areas will develop into a mature industry, from project design, equipment manufacturing to the construction and operation will be gradually toward specialization operation, thus for the waste incineration exhaust purification host form a complete set of bag filter, filter material will have greater prospects for development, or will become a new growth point of the demand of bag filter.
As public attention more and more high, the future waste incineration exhaust gas purification and waste incineration power generation industry areas will develop into a mature industry, from project design, equipment manufacturing to the construction and operation will be gradually toward specialization operation, thus for the waste incineration exhaust purification host form a complete set of bag filter, filter material will have greater prospects for development, or will become a new growth point of the demand of bag filter.
Cooper
