An emission reduction system based on pulse discharge to remove fine particles from sintering flue gas

A technology of fine particles and sintering flue gas, applied in the direction of electrostatic effect separation, solid separation, chemical instruments and methods, etc., can solve the problems of difficulty in effectively reducing the emission of fine particles and limited treatment effect, so as to improve the efficiency of agglomeration removal and improve Emission reduction effect, effect of enhanced charging effect

Active Publication Date: 2018-07-20
马鞍山家和新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that the existing dust removal method has limited treatment effect on fine particles in flue gas and it is difficult to effectively reduce the emission of fine particles in flue gas, the present invention provides an emission reduction system based on pulse discharge to remove fine particles in sintering flue gas, The fine particles are charged by pulse corona, and the agglomeration unit is sprayed with a charged agglomerating agent to strengthen the agglomeration effect of the particles, improve the agglomeration and removal efficiency of the fine particles, and reduce the emission of fine particles in the flue gas

Method used

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  • An emission reduction system based on pulse discharge to remove fine particles from sintering flue gas
  • An emission reduction system based on pulse discharge to remove fine particles from sintering flue gas
  • An emission reduction system based on pulse discharge to remove fine particles from sintering flue gas

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Embodiment 1

[0040] like figure 1 As shown, an emission reduction system based on pulse discharge in this embodiment for removing fine particles from sintering flue gas includes a flue gas pipe 610 and a removal device. The flue gas pipe 610 is connected to the bellows at the lower part of the sintering trolley. The removal device is arranged on the flue gas pipe 610, and the removal device includes a pulse charging unit 100, an agglomeration unit 200, and a trapping unit 300; wherein: the pulse charging unit 100 charges the particles through pulse discharge, and the agglomeration unit The 200 sprays an agglomerating agent into the flue gas to agglomerate the charged particles, and the capture unit 300 is used to capture the aggregated particles. The removal device is arranged on the flue gas duct 610 connected to the rear wind box 622, which is the corresponding wind box from the middle position in the longitudinal direction of the sintering trolley to the lower end position.

[0041] Th...

Embodiment 2

[0053] like figure 2 As shown, the basic content of this embodiment is the same as that of Embodiment 1, the difference is that the removal device also includes a pretreatment unit 400, and the pretreatment unit 400 is used to spray agglomerating agent or water or salt solution mist into the flue gas Droplets, water is used in this embodiment, and the particle size of the agglomerating agent or water sprayed into the pretreatment unit 400 is 0.2-3 μm. The pretreatment unit 400 includes a pretreatment nozzle 410, which is used to spray agglomerating agent or water or salt solution droplets into the flue gas, and what is sprayed in this embodiment is: water droplets , The droplet size is 0.2-3μm.

[0054] The emission reduction effect of fine particles using the removal device is as follows, wherein: PM10 emission reduction efficiency (%) is: 47.1%, PM2.5 emission reduction efficiency (%): 34.3%, improving the emission reduction effect of fine particles. Compared with Example...

Embodiment 3

[0058] like image 3 and Figure 4 As shown, the basic content of this embodiment is the same as that of Embodiment 2, except that the pretreatment unit 400 of the removal device is arranged on the pipeline axis of the expansion tube 510, and the pretreatment unit 400 includes a pretreatment nozzle 410 and a guide tube. The flow member 420, wherein the flow guide member 420 is arranged on the windward side of the pretreatment nozzle 410, and the flow guide member 420 is arranged at the pipe wall edge position of the expansion pipe 510, wherein the flow guide member 420 includes a first flow guide block 421 and a second flow guide block 421 Two deflector blocks 422, the first deflector block 421 is arranged on the windward side of the second deflector block 422, the first deflector block 421 and the second deflector block 422 are arranged at the edge position of the expansion pipe 510, and the pretreatment spray There is no deflector block directly in front of the tube 410, wh...

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Abstract

The invention discloses an emission reducing system for removing sintering flue gas fine particles based on pulse discharge, and belongs to the technical field of pollutant removal in the sintering process. The emission reducing system comprises a flue gas pipe and a removing device; the flue gas pipe is connected with an air bellows at the lower part of a sintering trolley; the removing device is arranged on the flue gas pipe; the removing device is used for removing fine particles in flue gas; the removing device includes a pulse charge unit, an agglomeration unit and a capturing unit; the pulse charge unit enables the particles to carry charges through pulse charge; the agglomeration unit sprays an agglomerating agent in the flue gas to agglomerate the electrified particles; and the capturing unit is used for capturing the agglomerated particles. The fine particles are made to carry the charges through pulse coronas; and the agglomeration unit sprays the charge-carried agglomerating agent to reinforce the agglomeration effect of the particles, so that the agglomeration removing efficiency of the fine particles is improved, and the fine particles in the flue gas are effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of pollutant removal in the sintering process, and more specifically relates to an emission reduction system for removing fine particles of sintering flue gas based on pulse discharge. Background technique [0002] Fine particulate matter pollution is now a serious environmental problem in our country, seriously affecting people's life and health. At present, the main particulate matter in the iron and steel metallurgy industry mainly comes from the iron ore sintering process. The iron ore sintering process is an indispensable link in the modern iron and steel production process, and it is also the largest PM in the iron and steel industry. 10 and PM 2.5 Emission source: After electric dust removal of sintering flue gas, the annual emission of particulate matter exceeds 1 million tons, accounting for about 40% of the total emission. At present, the sintering plant mainly uses electrostatic precipitator to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03C3/017B03C3/011
CPCB03C3/011B03C3/0175
Inventor 春铁军音正元龙红明王欢狄瞻霞王平孟庆民余正伟魏汝飞薛凡穆固天许伟王松
Owner 马鞍山家和新材料科技有限公司
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