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Method for removing sintering flue gas fine particles based on pulse discharge

A fine particle and pulse discharge technology, which is applied in chemical instruments and methods, power supply technology, electrostatic separation, etc., can solve the problems that it is difficult to effectively control the emission of fine particles in the sintering flue gas, and the treatment effect of fine particles is limited, so as to improve the agglomeration and detachment. The effect of removing efficiency, promoting reunion growth, and controlling emissions

Active Publication Date: 2017-04-26
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 control the emission of fine particles in sintering flue gas, the present invention provides a method for removing fine particles in sintering flue gas based on pulse discharge, 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 control the emission of fine particles in the sintering flue gas

Method used

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  • Method for removing sintering flue gas fine particles based on pulse discharge
  • Method for removing sintering flue gas fine particles based on pulse discharge
  • Method for removing sintering flue gas fine particles based on pulse discharge

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Embodiment 1

[0043] like figure 1 As shown, a method for removing fine particles from sintering flue gas based on pulse discharge of the present invention, the emission reduction steps are as follows:

[0044] Step 1: Pulse charging of fine particles

[0045] The flue gas first enters the pretreatment unit 400 of the removal device for pretreatment. The removal device is the above-mentioned device for removing fine particles of sintering flue gas by pulse corona charging. The pretreatment unit 400 includes a pretreatment nozzle 410, the pretreatment nozzle 410 is used to spray the mist of agglomerating agent or water or salt solution into the flue gas, and the particle size of the mist droplet is 0.2-3 μm; Particles, agglomerating agent or water or salt solution form a coating layer on the surface of fine particles, increasing the particle size in the particles, making the particles avoid the medium particle size, and reducing the proportion of fine particles in the medium particle size r...

Embodiment 2

[0062] like figure 2As shown, the basic content of this embodiment is the same as that of Embodiment 1, the difference is that: it also includes a pretreatment unit 400, and the pretreatment unit 400 is used to spray the mist of agglomerating agent or water or salt solution into the flue gas. In this embodiment, water is used, 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.

[0063] 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 1, PM10 emission...

Embodiment 3

[0067] 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 is arranged on the pipeline axis of the expansion tube 510, and the pretreatment unit 400 includes a pretreatment nozzle 410 and a flow guide Components 420, wherein the flow guiding component 420 is arranged on the windward side of the pretreatment nozzle 410, and the flow guiding component 420 is set at the pipe wall edge position of the expansion pipe 510, wherein the flow guiding component 420 includes a first flow guiding block 421 and a second flow guiding block 421 The flow guide block 422, the first flow guide block 421 is arranged on the windward side of the second flow guide block 422, the first flow guide block 421 and the second flow guide block 422 are arranged at the edge position of the expansion pipe 510, and the pretreatment nozzle There is no deflector block directly in front of 410, which strengthens t...

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Abstract

The invention discloses a method for removing sintering flue gas fine particles based on pulse discharge and belongs to the technical field of pollutant emission reduction in the sintering process. The method comprises the steps that the fine particles in flue gas are charged through pulse discharge; agglomeration liquid with positive charge and agglomeration agent fogdrops with negative charge are sprayed into the flue gas; the charged fine particles and the agglomeration agent fogdrops with the opposite charge are agglomerated under the effect of attractive force of the opposite charge and grow up to form particle agglomerates; and the particle agglomerates are removed from the flue gas through capturing and collecting. According to the method, the fine particles are charged through pulse corona, the agglomeration effect of the particles is enhanced by spraying a charged agglomeration agent into agglomeration units, the agglomeration removing efficiency of the fine particles is improved, and emission of the fine particles in the iron core sintering process is reduced.

Description

technical field [0001] The invention belongs to the technical field of pollutant emission reduction in sintering process, and more specifically relates to a method 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 purify the pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C3/013B03C3/014B03C3/34B03C3/66
CPCB03C3/013B03C3/014B03C3/34B03C3/66
Inventor 春铁军音正元王欢龙红明狄瞻霞王平孟庆民余正伟魏汝飞李东升薛凡王松许伟
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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