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Application of dust collector in environmental protection industry

浏览 Author Admin Browse Published 18/12/14

Application of dust collector in environmental protection industry

Bag dust collector is used in the cement industry. Bag dust collector technology is a major dust removal technology widely used in metallurgy, foundry, building materials, electric power, cement, steel, chemical, carbon, smelting and other industries. Due to the high efficiency of bag dust removal technology, which can meet the extremely strict emission standards, it has received widespread attention from developed countries. Bag dust collectors and related technologies have also gained tremendous development and application. 80% of the exhaust gas of the German cement industry is purified by a bag filter, which makes the amount of cement dust loss less than 0.05% of its output. Some locations that have traditionally used electrostatic precipitators, such as rotary kiln tails and coolers, have also begun to be transformed into large-scale bag precipitators. The reason is that although the operating cost of a bag filter is higher than that of an electrostatic precipitator, its equipment cost is often only half that of an electric precipitator. More importantly, the discharge concentration of the electric precipitator is difficult to reach 50mg / m3. Many developed countries such as the United States, Canada, and Australia also use bag dust collectors to replace electric dust collectors in the dust removal of power plants.For example, 18 of the 20 coal-fired units in New South Wales, Australia use bag dust collectors, with a total installed capacity of Over 10,000MW, which greatly reduces the amount of dust emitted from the power plant. Due to the limitation of economic and technological conditions in China and some conceptual reasons, the bag dust removal technology in these areas has not been greatly developed. Since the reform and opening up, China's cement industry has made tremendous development. According to statistics at the end of 2005, there were 8,435 cement production enterprises in the country, with an annual production capacity of 590 million tons. The dust emitted by the cement industry has exceeded 10 million tons, ranking the first in various industries in the country. Among them, the output of vertical kiln cement accounts for 80%, dust emissions account for more than 90%, and dust loss accounts for 3.5% of its output, which not only seriously pollutes the environment, but also wastes a lot of raw materials and products. With the deepening of national environmental protection policies, the majority of vertical kiln cement plants urgently need mature and reliable smoke and dust removal technology; in addition, in the cement production process, along with the grinding technology of vertical grinding, extrusion grinding, and high-efficiency powder separator, Development, the new high-yield energy-saving grinding system has been applied, and new requirements have been put forward for the dust removal technology as a product collection function.

In the vertical kiln cement plant, bag dust removal technology has made great progress in the past ten years. Many advanced dust removal technologies, such as high-concentration bag dust collectors, centralized dust removal systems, including environmental protection problems of vertical kiln cement plants in the past, Dryer bag dust removal technology has been solved. Bag dust removal technology is widely used in vertical kilns, dryers, crushers, mills, high-efficiency powder separators, conveyor belts, silos, warehouse roofs, warehouse floors, and packaging systems. Bag kiln dust removal technology of vertical kiln cement plant has strong pertinence. There are special ones for vertical kiln dust removal and dryer dust removal, also for mill dust removal, and bag dust removal technology designed for local dust sources. At present, in various cement production and production enterprises, various types of cement dusting points are using bag dust collectors to collect dust, control dust, achieve dust removal effects, and meet environmental protection requirements.

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