environmental protection dust removal equipment, you know how many?

electrostatic precipitator are mainly in the following aspects: universal resistance electrostatic precipitator technology, mobile electrode electrostatic precipitator technology, membrane electrostatic precipitator technology, and laminar galvanic coagulation technology. Filter bag dust removal can be divided into positive pressure dust removal and negative pressure dust removal according to different pressures, but negative pressure dust removal is generally used in our country at present. Bag type dust collector has pulse injection type, long bag low pressure pulse type, split chamber ejector pulse type, filter simple pulse injection type, flat bag pulse injection type, rotary blowback type, gas box pulse type and other structural forms.

China's demand for bag filter is huge, dust filter material, especially high temperature fiber filter material has broad market prospects. China's "Twelfth Five-Year Plan" put forward higher demand for environmental protection, water, gas, sound, slag will be more application of filter materials, filter materials industry market prospects. Among them, in the field of smoke and dust control, bag dust removal due to high dust removal efficiency, will not cause secondary pollution, easy to recover dry materials and other properties, more and more widely used at home and abroad, accounting for 80% of the dust removal equipment used. The iron and steel industry is one of the main sources of air pollution. China's steel output has exceeded 0.3 billion tons. According to Baosteel's application of bag dust removal, it needs 21 million square meters. After conversion, the filter material is replaced by 6 million square meters every year.

During the "Eleventh Five-Year Plan" period, my country's steel production scale continued to expand rapidly, and the crude steel output increased from 0.35 billion tons to 0.63 billion tons, with an average annual growth rate of 12.2. Exceeding the average annual GDP growth rate of 11.2 during my country's "Eleventh Five-Year Plan" period, the output of pig iron and crude steel has steadily ranked first in the world. The data shows that my country's crude steel output in 2011 was 0.62 billion tons. According to the comprehensive forecast of the "Twelfth Five-Year Development Plan for the Iron and Steel Industry", the domestic crude steel-oriented consumption in 2015 was about 0.75 billion tons, indicating that the production capacity of my country's steel industry in the next few years And output will continue to grow steadily.

In China, the pollution problem of the iron and steel industry has always been very serious, and the main sources of pollutants are sulfur dioxide, dust, waste water and solid waste. Data show that in 2010, China's iron and steel industry smoke and dust emissions accounted for 20.7 of the total industrial emissions. Obviously, dust removal equipment in the steel industry market space is very broad. Following the success of bag dust removal technology in large blast furnaces, a large number of blast furnace gas dry dust removal systems have been completed and put into production. Shougang, WISCO, TISCO, Baosteel, Laigang, Baotou Steel, Tonggang, Chenggang and other enterprises have realized bag filtration and dust removal of blast furnace gas through new construction or transformation. According to incomplete statistics of the bag Committee, more than 100 blast furnaces in the country have adopted dry bag filter dust removal technology, including 2500m & sup3;, 3200m & sup3;, 5500m & sup3; And other large blast furnaces with various volumes, of which the blast furnace volume is 5800m & sup3;. With the application of bag filter in the steel industry more and more mature, the future will be with the industry capacity expansion and steady development.

China's coal-based primary energy structure determines that thermal power generation will be the main mode of power production in China for a long period of time in the future. In recent years, China's thermal power installed capacity to maintain steady growth. According to the "Rolling Research Summary Report on the Twelfth Five-Year Plan of the Electric Power Industry" issued by the China Electricity Council, it is estimated that my country's thermal power installed capacity will reach 0.928 billion kilowatts by 2015, and my country's thermal power installed capacity will reach 1.17 billion kilowatts by 2020.

thermal power industry is divided into the demand for the transformation of the existing power plant dust collector and the demand for the new power plant:(1) the demand for the transformation. According to our investigation and understanding of the situation, at present, in the thermal power enterprises that have implemented dust removal transformation, the transformation path is mainly to change the electrostatic precipitator to electric bag composite dust collector or bag filter. (2) New demand. According to our investigation and understanding of the situation, the current new thermal power plant using less electrostatic precipitator, most of the bag type dust collector or electric bag composite dust collector. This is mainly due to the difficulty of making the electrostatic precipitator meet the new emission standards. As the time for transforming dust collectors in power plants is generally not long, there is no unified view on which technology is better, and it takes longer to observe.

In general, the improvement of emission standards for coal-fired power plants will bring good opportunities to the rapid development of the dust collector industry. In terms of selection, through the comparison of the three dust removal methods, the application of dust collectors in the thermal power industry will continue to shift to bag dust collectors and electric bag composite dust collectors in the future, and the share of electrostatic precipitators will gradually decrease.

the 11th Five-Year Plan period, China's cement production increased by 11.9 per cent annually. According to the "Twelfth Five-Year Development Plan for the Cement Industry", during the "Twelfth Five-Year Plan" period, with the accelerated transformation of economic development mode, the total demand for cement in the domestic market will gradually change from high-speed growth to steady growth. It is predicted that the average annual demand for cement will increase by 3%-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 of the two is very different, so the selection of dust collector can not be generalized. Generally speaking, the kiln head tends to use electrostatic precipitators, and the kiln tail and other parts with low temperature tend to use bag filters. This is because the dust collected by the bag filter is actually cement concentrate, which can bring revenue to the company. However, there is also a trend in recent years, that is, the newly-built 4000-ton/day, 5000-ton/day, 10000-ton/day and 12000-ton/day production lines in the cement industry mostly use bag filters at the kiln head and kiln tail, and bag filters are used throughout the line, with a single machine processing air volume ranging from hundreds of thousands of m & sup3;/h to millions of m & sup3;/h, there are many cement enterprises will be in service electrostatic precipitator for the bag filter.

According to the requirements of the Ministry of Industry and Information Technology's "Guiding Opinions on Energy Conservation and Emission Reduction in Cement Industry", by the end of the "Twelfth Five-Year Plan", the national cement particulate matter emission will be reduced by 50% on the basis of 2009. It is clear that the existing cement kiln electrostatic precipitator will be changed from 2010 to 2015. Bag filter (low-voltage pulse filter), which undoubtedly laid a good foundation for the growth of bag filter in the cement industry in the next few years. Since the application of bag filters in the cement industry has accounted for the vast majority of the share, its main growth will come from the increase in national cement production capacity. During the "Twelfth Five-Year Plan" period, with the steady growth of the total demand for cement in the domestic market, the application of bag filters in the cement industry will also grow steadily.

at present, China is facing greater pressure of urban garbage disposal. According to the statistics and forecasts of the Ministry of Environmental Protection, the annual output of urban waste in China will be 0.152 billion tons in 2010, 0.179 billion tons and 0.21 billion tons in 2015 and 2020 respectively, and the average annual growth rate of waste production in China will reach 3.29 percent from 2010 to 2020.

Compared with other municipal waste treatment methods, waste incineration power generation has the advantages of good capacity reduction effect, thorough disinfection, reduction (or elimination) of the environmental impact of the subsequent disposal process, turning waste into treasure, and small footprint of the incineration plant. The National Development and Reform Commission clearly pointed out in the "China National Plan to Address Climate Change" that it 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 technologies to improve the level of localization. Effectively reduce costs and promote the industrialization of waste incineration technology". According to Article 7.3 of the Standard for Pollution Control of Domestic Waste Incineration (GB18485-2001), bag filters must be used for dust removal in domestic waste incinerators. This is the reason why the application share of bag filter in waste power generation industry is 100. However, the flue gas produced in the process of garbage incineration has the characteristics of great harm, high moisture content, high and low temperature mutual occurrence, fine smoke and dust particles, and strong corrosion, which puts forward high requirements for the performance of dust removal equipment. In recent years, the bag filter technology has been well adapted to the dust conditions of waste incineration and successfully overcome the above difficulties. The particulate emission concentration of some systems is 2.3-4.0mg/Nm & sup3;, dioxin emission concentration is 0.018-0.040ngTEQ/Nm & sup3;, 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.

, with the increasing attention of the public, the exhaust gas purification field of waste incineration and waste incineration power generation industry will develop into a mature industry in the future. From scheme design, equipment manufacturing to construction and operation, it will gradually move towards professional operation. Therefore, the main engine and filter material of bag filter for waste incineration exhaust gas purification will have greater development prospects, Or it will become a new growth point of bag filter demand.