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An 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 low equipment requirements, easy poisoning of catalysts, high denitrification efficiency, etc., and achieve the effect of saving ammonia consumption and realizing purification

Active Publication Date: 2022-07-29
四川恒泰环境技术有限责任公司
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  • Abstract
  • Description
  • Claims
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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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  • An electric melting furnace flue gas treatment device and method

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Effect test

Embodiment 1

[0035] The method for carrying out the above-mentioned electric melting furnace flue gas treatment device for electric melting furnace flue gas treatment comprises the following steps:

[0036] (1) The air volume adjustment system introduces cold air into the flue gas of the electric melting furnace generated by the production device. The volume ratio of the cold air to the flue gas of the electric melting furnace is 4.2:1. ;

[0037] (2) turn on the dilution fan 1 and the delivery pump 10 and pass the diluted ammonia water into the atomization device 3, and then pass into the pretreatment tower 5 after mixing with the flue gas after the dust removal obtained in the step (1), after filtering and adsorption treatment After that, the desulfurized flue gas is obtained;

[0038] (3) pass the desulfurization flue gas obtained in step (2) into the SCR reactor 6, and the space velocity is 5000h -1 , the flue gas temperature is 120 ℃, and then reacts with ammonia gas to denitrify un...

Embodiment 2

[0041] The method for carrying out the above-mentioned electric melting furnace flue gas treatment device for electric melting furnace flue gas treatment comprises the following steps:

[0042] (1) The air volume adjustment system introduces cold air into the flue gas of the electric melting furnace generated by the production device. The volume ratio of the cold air to the flue gas of the electric melting furnace is 3.25:1. ;

[0043] (2) turn on the dilution fan 1 and the delivery pump 10 and pass the diluted ammonia water into the atomization device 3, and then pass into the pretreatment tower 5 after mixing with the flue gas after the dust removal obtained in the step (1), after filtering and adsorption treatment After that, the desulfurized flue gas is obtained;

[0044] (3) pass the desulfurization flue gas obtained in step (2) into the SCR reactor 6, and the space velocity is 2000h -1 , the flue gas temperature is 150 ℃, and then reacts with ammonia gas to denitrify u...

Embodiment 3

[0047] The method for carrying out the above-mentioned electric melting furnace flue gas treatment device for electric melting furnace flue gas treatment comprises the following steps:

[0048] (1) The air volume adjustment system introduces cold air into the flue gas of the electric melting furnace generated by the production device. The volume ratio of the cold air to the flue gas of the electric melting furnace is 5:1. ;

[0049] (2) turn on the dilution fan 1 and the delivery pump 10 and pass the diluted ammonia water into the atomization device 3, and then pass into the pretreatment tower 5 after mixing with the flue gas after the dust removal obtained in the step (1), after filtering and adsorption treatment After that, the desulfurized flue gas is obtained;

[0050] (3) Pass the desulfurization flue gas obtained in step (2) into the SCR reactor 6, and the space velocity is 1000h -1 , the temperature is 180 ° C, and then reacts with ammonia gas to denitrify under the a...

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Abstract

The invention discloses a flue gas treatment device and method for an electric melting furnace. The device includes an air volume adjustment system, a low-temperature SCR reaction system, a flue gas online monitoring system and a control system. The low-temperature SCR reaction system includes a dust collector, an SCR reactor and an ammonia gas supply. System, the inlet end of the dust collector is connected with the air volume adjustment system, the dust collector is connected with the pretreatment tower through the atomization device, the atomization device is connected with the ammonia supply system, the pretreatment tower is connected with the SCR reactor, and the SCR reactor is connected with the chimney. The present invention also provides a method for treating the flue gas of an electric melting furnace by using the above device. The device of the invention is convenient to use, firstly removes dust and desulfurization and then denitrifies, optimizes the flue gas treatment process of the electric melting furnace, has low equipment requirements, high denitration efficiency, greatly reduces the possibility of catalyst poisoning, and effectively solves the problem of easy catalyst poisoning, low denitration efficiency and operating costs. It has a broad market application value.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and in particular relates to a flue gas treatment device and method for an electric melting furnace. Background technique [0002] Nitrogen oxides are one of the main pollutants in the atmosphere, the main cause of acid rain, but also the main cause 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 stationary sources, among which the mobile sources are mainly from motor vehicle exhaust; and the stationary 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-electrical industries. The central government has proposed to promote ultra-low emissions in the control of flue gas in non-electrical industries such as iron ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/75B01D53/76B01D53/86B01D53/50B01D53/56B01D50/20B01D46/30
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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