Electric demisting method and device for capturing and collecting fine particulate matters in flue gas generated after wet desulphurization

A fine particulate matter and wet desulfurization technology, applied in the field of electrostatic demisting, can solve the problems of limited ability of electrostatic precipitators to capture PM2.5, easy corrosion of chemical fibers, shortened service life of equipment, etc. Equipment height and floor area, effect of improving stability

Active Publication Date: 2014-04-16
CHINA HUADIAN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in this field, the electrostatic precipitator + limestone-gypsum wet desulfurization process is mainly used. The ability of the electrostatic precipitator to capture PM2.5 is limited. The flue gas enters the desulfurization tower and sprays limestone slurry in the desulfurization tower to react. The flue gas carries a large amount of PM2.5 and other harmful substances. The methods and equipment used in the prior art to capture the fly ash at the outlet of the boiler can achieve a total purification effect of more than 99%, but it is useless for the flue gas after wet desulfurization. Any technical measures can only allow a large amount of PM2.5 to go unpunis

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  • Electric demisting method and device for capturing and collecting fine particulate matters in flue gas generated after wet desulphurization
  • Electric demisting method and device for capturing and collecting fine particulate matters in flue gas generated after wet desulphurization
  • Electric demisting method and device for capturing and collecting fine particulate matters in flue gas generated after wet desulphurization

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Embodiment 1

[0025] Embodiment 1 of the present invention: a method for trapping fine particles in flue gas after wet desulfurization, the flue gas produced by burning coal enters the desulfurization tower through the pipeline, and the flue gas reacts with the limestone slurry sprayed from the desulfurization tower, Saturated wet flue gas is produced, and the flue gas carries smaller particles of slurry droplets and evaporated water mist along the pipe into the flue gas activation chamber, where surfactants are sprayed in the flue gas activation chamber, and the water mist can be enhanced by surfactants. The surface tension of the fog and the wettability of the surface of the fine particles are improved. The fine particles collide with the surfactant to agglomerate and become larger and enter the electrostatic demist device. The electric field formed in the electrostatic demist device charges the agglomerated fine particles and moves to The direction of the dust collector moves, and the sus...

Embodiment 2

[0027] Embodiment 2 of the present invention: as Figure 4A system using an electric defogging device is shown, including an electric defogging device body 1, a power supply system 2, and a control system 3, including an electric defogging device body 1, a power supply system 2, and a control system 3, wherein the electric defogging device The main body 1 is provided with an airflow distribution device 4, an air intake chamber 6, a defogging chamber 7 and an exhaust chamber 8 in order from top to bottom. In the channel and connected with the air distribution device 4. A spraying device 10 is arranged in the flue gas activation chamber 5 . An electric demister 11 is provided in the demister chamber 7 . The electrostatic demister 11 includes a discharge electrode 12 and a dust collection electrode 13, the discharge electrode 12 is connected with a high voltage power supply 14, the discharge electrode 12 adopts a rigid structure, and the dust collection electrode 13 adopts cond...

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Abstract

The invention discloses an electric demisting method and device for capturing and collecting fine particulate matters in flue gas generated after wet desulphurization. Flue gas generated after wet desulphurization enters a flue gas activating chamber, surfactant liquid mist is sprayed in the flue gas activating chamber, fine particulate matters in the flue gas collide with the liquid mist and aggregate to become bigger, the aggregated fine particulate matters are electrically charged and moved towards a dust collection polar through an electric field formed by an electric demister, and the fine particulate matters are condensed into a liquid film and attached to the dust collection polar. The electric demisting device for implementing the method comprises an electric demisting device body, wherein an air flow distribution device, an inlet chamber, a demisting chamber, an exhaust chamber, an air outlet and the flue gas activating chamber connected with the air flow distribution device are arranged on the electric demisting device. Compared with the prior art, the method and the device can improve the capturing capability of an electric dedusting device to fine particulate matters, effectively reduces the height of equipment and occupied area, prolongs the service life of the equipment, and lowers the maintenance cost of the equipment.

Description

technical field [0001] The invention relates to an electric defogging method and device for collecting fine particles in flue gas, in particular to an electric defogging device method and device for collecting fine particles in flue gas after wet desulfurization in a coal-fired power plant. Background technique [0002] At present, inhalable particles (PM10), especially particles with a diameter less than or equal to 2.5 microns (PM2.5), have become another serious problem affecting the environment in our country. Although PM2.5 is only a small component of the earth's atmospheric composition, it has an important impact on air quality and visibility. Compared with coarser atmospheric particulate matter, PM2.5 has a smaller particle size, but it is rich in a large amount of toxic and harmful substances, and has a long residence time in the atmosphere and a long distance of transmission, so it has a greater impact on human health and atmospheric environmental quality . With ...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/48B03C3/41B03C3/53B03C3/88
Inventor 李建浏高明峰沈煜辉王秀和魏文
Owner CHINA HUADIAN ENG
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