Fume treatment plant's industry development

Development of fume treatment plant

The application and development of fume treatment plant technology are closely related to the process of industrialization in China. Dust removal technology generally includes mechanical dust removal, wet dust removal, electrostatic dust removal and bag dust removal.

Mechanical dust removal uses the gravity settlement, inertia or centrifugal force of dust to separate dust. Its dust removal efficiency is generally less than 90%, with low dust removal efficiency, low resistance and energy saving.

Wet dust removal uses the principle of gas-liquid contact washing to separate the dust in the dusty gas into the liquid to remove the dust in the gas. Its dust removal efficiency is slightly higher than that of mechanical dust removal, but it is easy to cause secondary pollution of washing liquid.

Electrostatic dust removal is to charge the dust particles by passing the dusty gas through a strong electric field. When it passes through the dust removal electrode, the particles with positive / negative charge are adsorbed by the negative / positive electrode plate respectively, so as to remove the dust in the gas. Electrostatic precipitator has high dust removal efficiency, but its dust removal efficiency is greatly affected by dust specific resistance, which is easy to lead to unstable dust removal efficiency. Since the 1990s, electrostatic precipitators have been widely used in the treatment of smoke and dust pollution with high temperature, large amount of flue gas and complex working conditions, such as thermal power generation and cement kiln. Bag filter uses fiber filter material to collect solid particles in dusty gas, form filter dust cake, and further filter fine dust particles through filter dust cake, so as to achieve the purpose of high-efficiency dust removal. Bag dust removal technology can stably achieve high dust removal efficiency, and the dust emission can be less than 5mg / m3, and the dust removal efficiency is not affected by dust characteristics such as dust specific resistance. Generally speaking, the dust with particle size less than 10 microns (i.e. inhalable particles) has a great impact on human health, and the bag filter has a high separation efficiency for inhalable particles. With the further development of high temperature resistant filter material and pulse ash cleaning technology, bag filter has been more and more widely used in the treatment of high temperature and high concentration flue gas with excellent dust removal performance.

With the acceleration of industrialization and urbanization, China's air pollution is becoming more and more serious, and the emission standards of air pollutants are becoming more and more strict. Electrostatic precipitator and bag filter with high dust removal efficiency have been widely used. At present, electrostatic dust removal and bag dust removal are the mainstream dust removal technologies in China.

Compared with electrostatic precipitator, bag filter has greater advantages in energy conservation and emission reduction. Under the situation of increasingly strict national emission standards, the use of bag filter will become the main choice to control dust pollution.

Application of fume collector

Development overview of dust removal equipment industry dust removal equipment is mainly used in cement, steel, non-ferrous metals, electric power, machinery, chemical industry, waste incineration and other industries with serious dust pollution. The change of the total output value of dust removal equipment industry is closely related to the economic development environment at home and abroad and the development of downstream industries. In recent years, the total output value (sales revenue) of dust removal equipment in China has fluctuated, increasing from 13.998 billion yuan in 2005 to 29.007 billion yuan in 2008, with an average annual compound growth rate of 27.49%. In 2009, affected by the international financial crisis, the development growth rate of China's cement, steel, non-ferrous metals, machinery and other industries fell sharply, and the output value of some industries even showed negative growth, resulting in a temporary slight decline in the total output value of China's dust removal equipment industry.