Comprehensive treatment method for up-to-standard emission of coking tail gas

A technology for comprehensive treatment and coking tail gas, applied in the field of coking, to achieve the effect of reducing investment, reducing total VOC load and reducing consumption

Pending Publication Date: 2022-07-29
上海圣升化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the urgent problems that need to be solved in the existing coke oven gas purification area, according to the embodiment of the present invention, it is hoped to provide a brand new comprehensive treatment method for coking tail gas discharge that can effectively solve environmental pollution

Method used

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  • Comprehensive treatment method for up-to-standard emission of coking tail gas

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Effect test

Embodiment 1

[0036] The coking project of a coking plant has a scale of 1.45 million tons of dry full coke. The gas purification section consists of condensing blasting (including five processes of washing, primary cooling, electric capture, blasting, and tar and ammonia separation), HPF desulfurization, phosphoric acid washing ammonia, It is composed of seven units of final cold washing of benzene, fine desulfurization of gas, ammonia distillation, and negative pressure crude benzene distillation. Among them, the negative pressure crude benzene distillation adopts the tube furnace negative pressure debenzene process, and the tube furnace adopts the waste gas burner in this patent; the gas desulfurization process adopts the wet oxidation HPF desulfurization process, and the generated HPF regeneration tail gas contains 19.2% of oxygen. wt%, after being treated by the water washing tower, it is sent to the negative pressure debenzene tubular furnace as combustion-supporting air; after the fin...

Embodiment 2

[0038] The coking project of a coking plant has a scale of 3.5 million tons of dry coke. The gas purification section consists of condensing blasting (including five processes of washing, initial cooling, electric capture, blasting, and separation of tar and ammonia water), AS desulfurization, and final cold washing of benzene. , Coal gas fine desulfurization, ammonia distillation, negative pressure crude benzene distillation six units. Among them, the negative pressure crude benzene distillation adopts the tube furnace negative pressure debenzene process, and the tube furnace adopts the waste gas burner in this patent; the gas desulfurization process adopts the AS desulfurization process non-wet oxidation process, so the negative pressure debenzene tube type All furnaces use air as combustion-supporting air; after the fine desulfurization of the gas, the gas contains H 2 S: 0.1mg / m 3 ,NH 3 :0.6mg / m 3 , as the main fuel of the negative pressure debenzene tube furnace, the o...

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Abstract

The invention discloses a comprehensive treatment method for up-to-standard emission of coking tail gas, which comprises the following steps: combining a negative pressure debenzolization unit, a wet oxidation desulfurization regeneration tail gas treatment unit and a gas fine desulfurization unit in a coke oven gas purification area with a tubular furnace system, and taking purified gas treated by the gas fine desulfurization unit as a tubular furnace main fuel; organic waste gas of the negative-pressure debenzolization unit serves as auxiliary fuel of a tubular furnace and enters a waste gas burner to be combusted, tail gas obtained after wet oxidation desulfurization regeneration tail gas is treated by an ammonia washing system serves as combustion-supporting air of the tubular furnace, air is supplemented when the gas amount is insufficient, and the tail gas combusted through the tubular furnace meets the standard emission requirement and is directly discharged. Organic waste gas of a debenzolization unit and regenerated tail gas of a wet oxidation desulfurization unit are introduced into a tubular heating furnace for incineration treatment, and hydrocarbon in the waste gas is decomposed into harmless water and carbon dioxide under the action of high temperature.

Description

technical field [0001] The invention belongs to the technical field of coking, and in particular relates to a comprehensive treatment method for coking tail gas up-to-standard discharge. Background technique [0002] The coke oven gas purification area generally includes the cooling and discharge of the waste gas, the gas desulfurization, the gas deamination, the gas debenzene and the gas fine desulfurization. [0003] Coal gas desulfurization often adopts wet oxidation desulfurization process, and the regenerated tail gas generated by the regeneration tower contains ammonia, hydrogen sulfide and oxygen, etc., and it is difficult to ensure the discharge of the tail gas after water washing. The vacuum exhaust generated by the negative pressure debenzene tower in the gas debenzene area and the exhaust gas from the tank area. These exhaust gases contain various organic compounds such as benzene and phenols. Direct emission will cause air pollution and require further adsorption...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F23G7/06F23G5/44F23G5/12F23G5/02F23G5/00B01D53/14B01D53/48B01D53/78C10K1/00C10K1/18C10K1/32
CPCF23G7/065F23G5/006F23G5/12F23G5/02F23G5/44C10K1/002C10K1/18C10K1/32C10K1/004B01D53/78B01D53/48B01D53/1487B01D2252/40B01D2252/205B01D2258/02F23G2204/103F23G2209/14
Inventor黄恒波张婧杨勇陈晓彤
Owner上海圣升化工科技有限公司