In China, coal keeps a high proportion in the energy structure regarding as a primary energy source. Single utilization pattern, insufficient fuel availability and massive coal combustion bring the serious air pollution. According to statistics, China's air pollution is mainly manifested as soot type. 90% of SO2, 70% of smoke, 85% of CO2 discharged into the atmosphere are from coal mine while the smoke discharged from the heat-engine plant keep a 80％proportion of the industrial fume emissions, especially the industrial electricity increased dramatically with our country’s economic growth. The installed capacity of large heat-engine plant is developed from hundreds of thousand kilowatts to one million kilowatts, which is a huge pressure to the environment.
A large number of dusts will be a direct factor to reduce the atmospheric visibility. In recent years, the dust storms occurred frequently mainly caused by a large number of particles existing in the atmosphere for a long time, which also had a negative effect on traffic and public psychology. A lot of dust enters into human body, causing a series of respiratory diseases. Especially the coal dust forms the black smoke as carbon granules when incomplete combustion, absorbing a lot of harmful gases and many pathogenic microorganisms, will cause a great threat to the human health. Meanwhile, the discharged dust from the industrial production also have a great influence on the production, which will reduce the quality of products and the machine's working accuracy. The high concentrations of dust even can cause explosions, resulting in a great damage and causing a great threat to stuff life and property, while a lot of dust emissions also cause a great waste of resources.
According to the state regulations, the latest emission standards is 30mg/m3 while thee industrial waste gas must be disposed before discharging into the atmosphere, in order to reduce dust emissions from industrial and mining enterprises, prevent and control air pollution, protect the ecological environment and human health. As an important dust removal device, dust collector with properties of a low pressure loss, low energy consumption, high efficient dust collection plays a vital role in the gas disposal.
