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Device for removing fine particulate matter of sintering flue gas by pulse corona charge

A technology of pulse corona and sintering flue gas, applied in the direction of electrostatic separation, electrostatic effect separation, external electrostatic separator, etc., can solve the problems of limited treatment effect of fine particles and difficulty in effectively controlling the emission of fine particles in sintering flue gas, etc., to achieve Improve the efficiency of agglomeration removal, promote the growth of agglomerates, and strengthen the effect of charging

Inactive Publication Date: 2017-05-24
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 processing effect on fine particles in flue gas and it is difficult to effectively control the discharge of fine particles in sintering flue gas, the present invention provides a pulse corona charging method for removing fine particles in sintering flue gas The device uses pulsed corona to charge the fine particles, and the agglomeration unit sprays the 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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  • Device for removing fine particulate matter of sintering flue gas by pulse corona charge
  • Device for removing fine particulate matter of sintering flue gas by pulse corona charge
  • Device for removing fine particulate matter of sintering flue gas by pulse corona charge

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Embodiment 1

[0037] Such as figure 1 As shown, a device for removing fine particles in iron ore sintering flue gas by pulse corona discharge in this embodiment includes a pulse charging unit 100, an agglomeration unit 200 and a trapping unit 300; and the trapping unit 300 are sequentially arranged in the gas pipeline along the flow direction of the flue gas, wherein the gas pipeline is the removal pipeline 500, the diameter of the removal pipeline 500 is larger than the diameter of the flue gas pipeline 600, and the removal The inlet end of the removal pipe 500 is connected to the flue gas pipe 600 through the expansion pipe 510, and the gas outlet end of the removal pipe 500 is connected to the flue gas pipe 600 through the shrinkage pipe 520, that is, the removal pipe 500 is installed in series on the flue gas pipe 600, The flue gas enters the removal pipe 500 from the expansion pipe 510, and enters the flue gas pipe 600 through the shrinkage pipe 520 after the agglomeration grows. Since...

Embodiment 2

[0048] Such as figure 2 As 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.

[0049] 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 emis...

Embodiment 3

[0053] Such as image 3 with 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 of the expansion pipe 510, and the pretreatment nozzle There is no deflector block directly in front of 410, which strengthens the wr...

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Abstract

The invention discloses a device for removing fine particulate matter of sintering flue gas by pulse corona charge, and belongs to the technical field of removal of pollutants in the sintering process. The device comprises a pulse charge unit, an agglomeration unit and a trapping unit, wherein the pulse charge unit, the agglomeration unit and the trapping unit are sequentially arranged in a gas pipeline in the flowing direction of the flue gas; the pulse corona electrodes of the pulse charge unit enable the particulate matter to be charged through pulse discharge; the agglomeration unit comprises an electropositive fogdrop spraying mechanism and an electronegative fogdrop spraying mechanism, wherein the electropositive fogdrop spraying mechanism or the electronegative fogdrop spraying mechanism is used for spraying fogdrops of an agglomeration agent with positive charge or negative charge into the flue gas, and the fogdrops of the agglomeration agent are agglomerated with the charged particulate matter; and the trapping unit is used for collecting the agglomerated particulate matter. According to the device, the fine particulate matter is charged by the pulse corona, and the agglomeration unit sprays the charged agglomeration agent into the flue gas so that the agglomeration effect of the particulate matter can be enhanced, and the efficiency of agglomeration and removal of the fine particulate matter can be improved.

Description

technical field [0001] The invention belongs to the technical field of pollutant removal in sintering process, and more specifically relates to a device for removing fine particles of sintering flue gas by pulse corona charging. 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 particulate m...

Claims

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Application Information

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IPC IPC(8): B03C3/014B03C3/01B03C3/04B03C3/34
CPCB03C3/014B03C3/01B03C3/04B03C3/34
Inventor 春铁军音正元王欢龙红明王平孟庆民狄瞻霞余正伟魏汝飞宁超王松许伟薛凡
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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