Method for controlling sulfur and nitrate from coke oven flue gas source

A coke oven and source technology, applied in the field of coking, can solve the problems of unsatisfactory control effect of sulfur content and nitrate content, pollution and other problems, and achieve the effect of direct control effect, obvious control effect and high treatment cost

Inactive Publication Date: 2021-01-29
TANGSHAN ZHONGRUN COAL CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing technology is to control the pollutants within the allowable range of the country through the technical means of flue gas desulfurization and

Method used

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  • Method for controlling sulfur and nitrate from coke oven flue gas source
  • Method for controlling sulfur and nitrate from coke oven flue gas source
  • Method for controlling sulfur and nitrate from coke oven flue gas source

Examples

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Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment provides a method for controlling sulfur and nitrification at the source of coke oven flue gas, including:

[0049] Step 1, desulfurization step:

[0050] The desulfurization step uses PDS wet desulfurization to desulfurize the returned furnace gas. After desulfurization, the hydrogen sulfide content in the returned furnace gas is 20mg / m 3 .

[0051] Return furnace gas refers to coke oven gas used for combustion in coke ovens, which is obtained from raw coal gas after gas purification, except for 90% H 2 In addition to S, also includes C 4 h 4 S, C 2 h 5 SH, CH 3 SH and CH 3 SCH 3 . Raw gas purification is to remove the H in the gas 2 S by 10g / m 3 Reduced to 300mg / m 3 , residual H in the gas after purification 2 S is the main source of sulfur dioxide in combustion flue gas, so to reduce the sulfur content from the source, it is necessary to deal with H 2 S.

[0052] The main principle of PDS wet desulfurization treatment of returned furnac...

Embodiment 2

[0059] This embodiment provides a method for controlling sulfur and nitrification at the source of coke oven flue gas, including:

[0060] Step 1, desulfurization step:

[0061] The desulfurization step uses PDS wet desulfurization to desulfurize the returned furnace gas. After desulfurization, the hydrogen sulfide content in the returned furnace gas is 20mg / m 3 .

[0062] Return furnace gas refers to coke oven gas used for combustion in coke ovens, which is obtained from raw coal gas after gas purification, except for 90% H 2 In addition to S, also includes C 4 h 4 S, C 2 h 5 SH, CH 3 SH and CH 3 SCH 3 . Raw gas purification is to remove the H in the gas 2 S by 10g / m 3 Reduced to 300mg / m 3 , residual H in the gas after purification 2 S is the main source of sulfur dioxide in combustion flue gas, so to reduce the sulfur content from the source, it is necessary to deal with H 2 S.

[0063] The main principle of PDS wet desulfurization treatment of returned furnac...

Embodiment 3

[0098] This embodiment provides a method for controlling sulfur and nitrification at the source of coke oven flue gas, including: a desulfurization step and a denitrification step.

[0099] The desulfurization step uses PDS wet desulfurization to desulfurize the returned furnace gas. After desulfurization, the hydrogen sulfide content in the returned furnace gas is 20mg / m 3 .

[0100] Return furnace gas refers to coke oven gas used for combustion in coke ovens, which is obtained from raw coal gas after gas purification, except for 90% H 2 In addition to S, also includes C 4 h 4 S, C 2 h 5 SH, CH 3 SH and CH 3 SCH 3 . Raw gas purification is to remove the H in the gas 2 S by 10g / m 3 Reduced to 300mg / m 3 , residual H in the gas after purification 2 S is the main source of sulfur dioxide in combustion flue gas, so to reduce the sulfur content from the source, it is necessary to deal with H 2 S.

[0101] The main principle of PDS wet desulfurization treatment of retu...

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Abstract

The invention relates to a method for controlling sulfur and nitrate from a coke oven flue gas source, and belongs to the technical field of coking. The method for controlling sulfur and nitrate fromthe coke oven flue gas source comprises the steps of 1, desulfurization, specifically, desulfurizing recirculated coal gas by adopting PDS wet desulfurization, wherein the content of hydrogen sulfidein the desulfurized recirculated coal gas is 20mg/m<3>; and 2, denitration, specifically, adjusting the temperature of the coke oven according to the relationship between the state parameters of the coke oven and a preset value in the denitration step. According to the method for controlling sulfur and nitrate from the coke oven flue gas source, the sulfur content and the nitrate content are controlled from the coke oven flue gas source, and the control effect is good.

Description

technical field [0001] The invention belongs to the technical field of coking, and in particular relates to a method for controlling sulfur and nitrification at the source of coke oven flue gas. Background technique [0002] Coke oven flue gas is the exhaust gas produced by the combustion of coke oven gas during the production of coke in the coke oven, among which sulfur dioxide and nitrogen oxides are gas components that are harmful to the atmosphere. Sulfur dioxide is produced by the combustion of sulfur-containing substances such as hydrogen sulfide in coke oven gas; nitrogen oxides are mainly thermal nitrogen oxides, which are exponentially proportional to the temperature of the combustion flame center. [0003] The existing technology uses flue gas desulfurization and denitrification technology to control pollutants within the allowable range of the state, but its control effect on sulfur and nitrate content is not ideal, and it still causes relatively large pollution. ...

Claims

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Application Information

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IPC IPC(8): C10B29/02C10B29/06C10B57/00C10K1/00C10K1/10
CPCC10B29/02C10B29/06C10B57/00C10K1/004C10K1/10
Inventor 张波波王志永赵宝杰陈金张宝龙闻晓今尹更新王永强李冰川任铭王明刘慧赵苗
Owner TANGSHAN ZHONGRUN COAL CHEM CO LTD
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