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A purification process system for coke oven gas

A purification process, a technology for coke oven gas, which is used in combustible gas purification, combustible gas purification/transformation, and removal of gas pollutants, etc. It can solve gas corrosion of gas pipelines and gas-related equipment, reduce steel quality, and reduce CO content. and other problems, to achieve the effect of facilitating system maintenance, avoiding secondary pollution, and high desulfurization efficiency

Inactive Publication Date: 2016-05-04
SICHUAN AVIATION TUBE IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, coke oven gas has been widely used in fuel, chemical raw materials, etc. We know that unpurified coke oven gas contains a variety of gas components, especially tar, naphthalene, hydrogen cyanide, hydrogen sulfide and A variety of organic sulfur with complex structure, etc., when used as fuel, especially coke oven gas is often used for urban civilian use due to its high calorific value and low CO content. Coal gas is easy to produce sulfur dioxide in the combustion process, which not only pollutes the air, but is also highly toxic to the human body, and has a serious corrosive effect on gas pipelines, gas-related equipment and gas; when used as chemical raw materials, it can be used as steel Enterprises refine steel, but the content of hydrogen sulfide in coke oven gas will reduce the quality of steel. Therefore, coke oven gas must be desulfurized before use

Method used

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  • A purification process system for coke oven gas
  • A purification process system for coke oven gas

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Embodiment 1

[0025] This embodiment proposes the purification process system of coke oven gas, and its structure is as follows figure 1 As shown, it includes an initial cooling tower, an electric tar catcher, a precooling tower, a benzene washing tower, a desulfurization tower, a final cooling tower and an ammonia remover connected in sequence, and the initial cooling tower is connected to the coke oven gas pipe 1. There is a purified gas outlet 2 on the desulfurization tower, and a regeneration tower is connected to the desulfurization tower to provide desulfurization liquid for the desulfurization tower. The upper part of the desulfurization tower is provided with a NaOH washing section 3, and the top of the desulfurization tower is provided with a gas outlet 4 connected with the final cooling tower. , the lower section of the desulfurization tower is provided with a gas inlet 5 connected to the benzene washing tower, a desulfurization liquid inlet 6 and a rich liquid outlet 7 connected t...

Embodiment 2

[0029] On the basis of Embodiment 1, this embodiment has the following differences: as figure 2 Shown, the ammonia remover that present embodiment relates to is the spray type saturator that is provided with ammonium sulfate outlet 8, in actual industrial process, spray type saturator comes from the ammonium sulfate production section, and coal gas is sent into the ammonium sulfate workshop section Spray-type saturator, in the spray-type saturator, it is sprayed with the circulating mother liquor containing 3.5-45% of free acid (sulfuric acid), and the circulating mother liquor absorbs the ammonia in the gas to form ammonium sulfate, and the ammonia is removed by the spray-type saturator The ammonia content in the final gas is generally less than 0.05g / m 3 .

[0030] Such as figure 2 As shown, in this embodiment, a blower is connected between the electric tar catcher and the pre-cooling tower, and the gas after tar removal is sent to the pre-cooling tower by the blower for...

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Abstract

A purification process system for coke oven gas is disclosed. The system comprises a primary cooling tower, an electrical tar precipitator, a precooling tower, a benzene washing tower, a desulfurizing tower, a final cooling tower and an ammonia remover which are connected in order. A primary cooler is communicated with a coke oven gas pipe. A purified-gas outlet is disposed in the ammonia remover. A regeneration tower for supplying a desulfurizing liquid to the desulfurizing tower is connected to the desulfurizing tower. The system is high in desulfurizing efficiency. Purified gas can be directly used for civilian uses, the metallurgical industry, and the like. After desulfurization and purification, the content of hydrogen sulfide can be lowered to 0.02 g / m3 and the content of hydrogen cyanide can be lowered to 0.1 g / m3.

Description

technical field [0001] The invention relates to a purification process system of coke oven gas, specifically relates to a purification treatment process of harmful substances in coke oven gas, and belongs to the field of waste gas treatment. Background technique [0002] Coke oven gas is a by-product produced in the coking process. my country is a big country in coking, producing 320m3 per ton of dry coal 3 According to the calculation of coke oven gas, the annual emission of coke oven gas in the country can reach as much as 64 billion cubic meters. At present, coke oven gas has been widely used in fuel, chemical raw materials, etc. We know that unpurified coke oven gas contains a variety of gas components, especially tar, naphthalene, hydrogen cyanide, hydrogen sulfide and A variety of organic sulfur with complex structure, etc., when used as fuel, especially coke oven gas is often used for urban civilian use due to its high calorific value and low CO content. Coal gas is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/00C10K1/02C10K1/10C10K1/12C10K1/18
CPCC10K1/002C10K1/003C10K1/004C10K1/006C10K1/028C10K1/103C10K1/122C10K1/18
Inventor 蒲安斌
Owner SICHUAN AVIATION TUBE IND CO LTD
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