Static electric cloth bag compact mixed type dust remover and its running method

Abstract

An electrostatic bag closely hybrid dust remover and the operation method are mainly used for the flue gas disposal in a power plant etc. A grounding collecting plate is placed between a high voltage discharge electrode and the bag inside a dust removing room. An electrostatic dust removing area is formed by two sides of the high voltage discharge electrode and the grounding collecting plate; a filtering and dust removing area is formed by two sides of the bag and the grounding collecting plate. When the bag filters, the grounding collecting plate is closed, and the flue gas enters into the dust removing room and goes through the electrostatic dust removing area to arrive at the end of the grounding collecting plate and then enters into the filtering and dust removing area. When the bag reversely blows and cleans ash, the grounding collecting plate opens, the gas and dust for reverse blowing and ash cleaning pass through the grounding collecting plate directly and reach the electrostatic dust removing area, and the dust for reverse blowing and ash cleaning is collected by static electricity. Compared with the prior invention, the dust removal is separated into two steps: when the bag filters, an electrostatic dust remover is completely used to greatly reduce a dust-containing concentration of the flue gas which enters into the bag; when the bag reversely blows and cleans ash, the electrostatic dust remover is used to effectively remove the dust for ash cleaning.

Description

technical field [0001] The invention relates to a device for removing particles in flue gas or gas, in particular to an electric dust collector and a bag filter, and belongs to the technical field of industrial dust removal. Background technique [0002] In industrial production, such as combustion devices for power generation and metal smelting, there are often solid dust particles, namely particulate matter, in the exhaust gas. These particles are scattered in the air, forming gray air masses, and drifting with the wind and falling everywhere, polluting the environment. Some particles with very small particle size can enter the human body from the respiratory tract, and a large amount of heavy metals may be enriched on the surface, which will cause great harm to the health of animals, plants and humans. Some links of industrial production also put forward high requirements on the quality of the air, which also puts forward the demand for the removal of particulate matter ...

AI Technical Summary

Problems solved by technology

Through the calculation of the most commonly used Deutsch model for calculating the dust removal efficiency of the electrostatic precipitator, it is found that the dust collection plate with openings in the patent WO 02 / 076618A2 has a removal efficiency of less than 60% of the particles in the flue gas, and in fact due to entering the bag filter area The flue gas does not pass through the complete orifice filter area, and the electrostatic precipitator efficiency will be reduced to a certain extent

If the bag is set to clean dust under a specific pressure, the cleaning frequency may be increased to 4 times due to the opening of the dust collector, which accelerates the aging of the bag and consumes more cleaning gas

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