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Electric melting furnace flue gas treatment device and method

A flue gas treatment and electric melting furnace technology, applied in the field of air pollution control, can solve the problems of easy poisoning of catalysts, low equipment requirements, low denitrification efficiency, etc., and achieve the effect of purification and saving ammonia consumption

Active Publication Date: 2020-06-19
四川恒泰环境技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above shortcomings, the present invention provides an electric furnace flue gas treatment device and method, the device is easy to use, dust removal and desulfurization first and then denitrification, the flue gas treatment process of the electric furnace is optimized, the equipment requirements are low, the denitrification efficiency is high, and catalyst poisoning is greatly reduced The possibility of effectively solving the problems of easy poisoning of the catalyst, low denitrification efficiency and high operating cost, etc., has broad market application value

Method used

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  • Electric melting furnace flue gas treatment device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The method for treating the above-mentioned electric melting furnace flue gas treatment device with electric melting furnace flue gas includes the following steps:

[0036] (1) The air volume control system introduces cold air into the flue gas of the electric smelter produced by the production device. The volume ratio of the cold air to the flue gas of the electric smelter is 4.2:1. After mixing, it is passed into the dust collector 4 to remove dust, and the flue gas after dust removal is obtained. ;

[0037] (2) Turn on the dilution fan 1 and the transfer pump 10 to pass the diluted ammonia water into the atomization device 3, and then mix with the dust-removed flue gas obtained in step (1) and pass it into the pretreatment tower 5, after filtering and adsorption treatment Afterwards, get desulfurization flue gas;

[0038] (3) Pass the desulfurization flue gas obtained in step (2) into SCR reactor 6 with a space velocity of 5000h -1 , The flue gas temperature is 120°C, and ...

Embodiment 2

[0041] The method for treating the above-mentioned electric melting furnace flue gas treatment device with electric melting furnace flue gas includes the following steps:

[0042] (1) The air volume adjustment system introduces cold air into the flue gas of the electric smelter produced by the production device. The volume ratio of the cold air to the flue gas of the electric smelter is 3.25:1. After mixing, it is passed into the dust collector 4 to remove dust, and the flue gas after dust removal is obtained. ;

[0043] (2) Turn on the dilution fan 1 and the transfer pump 10 to pass the diluted ammonia water into the atomization device 3, and then mix with the dust-removed flue gas obtained in step (1) and pass it into the pretreatment tower 5, after filtering and adsorption treatment Afterwards, get desulfurization flue gas;

[0044] (3) Pass the desulfurization flue gas obtained in step (2) into the SCR reactor 6, with a space velocity of 2000h -1 , The flue gas temperature is 15...

Embodiment 3

[0047] The method for treating the above-mentioned electric melting furnace flue gas treatment device with electric melting furnace flue gas includes the following steps:

[0048] (1) The air volume control system passes cold air into the flue gas of the electric smelter produced by the production device. The volume ratio of the cold air and the flue gas of the electric smelter is 5:1. After mixing, it is passed into the dust collector 4 to remove dust, and the flue gas after dust removal is obtained. ;

[0049] (2) Turn on the dilution fan 1 and the transfer pump 10 to pass the diluted ammonia water into the atomization device 3, and then mix with the dust-removed flue gas obtained in step (1) and pass it into the pretreatment tower 5, after filtering and adsorption treatment Afterwards, get desulfurization flue gas;

[0050] (3) Pass the desulfurization flue gas obtained in step (2) into the SCR reactor 6, with a space velocity of 1000h -1 , The temperature is 180 ℃, and then reac...

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Abstract

The invention discloses an electric melting furnace flue gas treatment device and method. The device comprises an air volume adjusting system, a low-temperature SCR reaction system, a flue gas onlinemonitoring system and a control system, the low-temperature SCR reaction system comprises a dust remover, an SCR reactor and an ammonia gas supply system, an inlet end of the dust remover is connectedwith the air volume adjusting system, the dust remover is connected with a pretreatment tower through an atomization device, the atomization device is connected with the ammonia gas supply system, the pretreatment tower is connected with the SCR reactor, and the SCR reactor is connected with a chimney. The device is convenient to use, dust removal, desulfurization and denitrification are performed in sequence, the flue gas treatment process of the electric melting furnace is optimized, the equipment requirement is low, the denitrification efficiency is high, the possibility of catalyst poisoning is greatly reduced, the problems that a catalyst is prone to poisoning, the denitrification efficiency is low, and the operation cost is high are effectively solved, and a wide market applicationvalue is achieved.

Description

Technical field [0001] The invention belongs to the technical field of air pollution control, and specifically relates to an electric melting furnace flue gas processing device and method. Background technique [0002] Nitrogen oxide is one of the main pollutants in the atmosphere and the main cause of acid rain. It is also the main reason for the formation of photochemical smog, near-surface atmospheric ozone, secondary fine particle pollution and surface water eutrophication. The main sources of nitrogen oxides are divided into mobile sources and fixed sources. The mobile sources are mainly from motor vehicle exhaust; while the fixed sources are mainly from thermal power plants and industrial boilers. After coal-fired power plants achieve ultra-low emissions, the focus of air pollution control is shifting to non-electric industries. The central government has proposed to promote ultra-low emissions in the flue gas control of non-electric industries such as steel. In view of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/76B01D53/86B01D53/50B01D53/56B01D50/00B01D46/30B01D46/00
CPCB01D53/75B01D53/8631B01D53/76B01D53/50B01D46/0036B01D46/30B01D53/346B01D2251/2062B01D2258/0283B01D50/20
Inventor 唐彤杨永见黄文凤李明刘世林赵君科孙冬池少聪万祖德
Owner 四川恒泰环境技术有限责任公司
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