Stand-alone dust removal equipment

Stand-alone dust removal equipment, is the equipment that separates dust from the flue gas, also called dust collector or dust removal equipment. Dust removal equipment utilises underground dust removal water pipes and pressurised air lines, additives added to the water, the introduction of wind pressure, and the completion of a series of processes through the equipment to produce a foam, which is sprayed onto the dust source via a distributor and nozzle holder assembly.

Industry development overview analysis

1, the development of dust removal technology overview of the application of dust removal technology development and China's industrialisation process is closely related. Dust removal technology generally includes mechanical dust removal, wet dust removal, electrostatic dust removal and bag type dust removal.

Mechanical dust removal is the use of dust gravity settlement, inertia or centrifugal force separation of dust, its dust removal efficiency is generally below 90%, low dust removal efficiency, low resistance, energy saving.

Wet dust removal is the use of gas-liquid contact scrubbing principle, the dust in the dusty gas will be separated into the liquid to remove the dust in the gas. Its dust removal efficiency is slightly higher than mechanical dust removal, but it is easy to cause secondary pollution of the washing liquid.

Electrostatic precipitator is to pass the dusty gas through a strong electric field, so that the dust particles are electrically charged, and when it passes through the electrodes, the positively/negatively charged particles are adsorbed by the negative/positive electrode plates respectively, so as to remove the dust in the gas. Electrostatic precipitator dust removal efficiency is higher, but its dust removal efficiency is greatly affected by the specific resistance of the dust, easy to lead to the dust removal efficiency is not stable. 1990s, the electrostatic precipitator in the thermal power generation, cement kilns, such as high temperature, large flue gas volume, the working conditions of the more complex dust pollution control is widely used. Bag filter uses fibre filter media to capture solid particles in the dusty gas, forming a filter dust cake, and further filtering fine dust particles through the filter dust cake to achieve the purpose of dust removal. Bag filter technology can achieve high dust removal efficiency stably, the dust emission can reach 5mg/m3 or less, and the dust removal efficiency is not affected by the specific resistance of dust and other dust characteristics. Generally speaking, dust with a particle size of less than 10 microns (i.e. respirable particles) has a greater impact on human health, and baghouse dust collectors have a high separation efficiency for respirable particles. Baghouse dust collector in the treatment of room temperature flue gas (<120 ℃) pollution in the application range is gradually expanding, with the filter media and pulse cleaning and other technology further development, baghouse dust collector with excellent dust removal performance, in the treatment of high temperature, flue gas treatment more and more widely used.

With the acceleration of industrialisation and urbanisation, China's air pollution is becoming increasingly serious, air pollutant emission standards are becoming increasingly stringent, the efficiency of the electrostatic precipitator, baghouse dust collector is widely used. At present, electrostatic precipitator and bag filter is the mainstream dust removal technology in China.

Bag filter than electrostatic precipitator in the energy saving and emission reduction has a big advantage, in the emission standards are becoming more and more stringent situation, the use of bag filter will become the main choice to control dust pollution.

2, dust removal equipment industry development overview dust removal equipment is mainly used in cement, iron and steel, non-ferrous metals, electric power, machinery, chemical industry, waste incineration and other dust pollution serious industries. Changes in the total output value of dust removal equipment industry is closely related to the economic development environment, the development of downstream industries. In recent years, China's dust removal equipment total output value (sales revenue) fluctuations, from 13.998 billion yuan in 2005 increased to 29.007 billion yuan in 2008, the average annual compound growth rate of 27.49%. 2009, affected by the financial crisis, China's cement, iron and steel, non-ferrous metals, machinery and other industries, the development of growth rate has dropped significantly, and the output value of some industries and even negative growth, thus making the total value of dust removal equipment industry changes with the economic development environment, downstream industry development situation, and so on. Thus, the total output value of China's dust removal equipment industry temporarily declined slightly.