Semi-dry ammonia desulphurization process for coke oven flue gas

An ammonia desulfurization and semi-dry technology, which is applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of not reaching ultra-low emissions, general desulfurization efficiency, and increasing investment costs and burdens of enterprises. Achieve the effect of saving manufacturing and installation costs

Inactive Publication Date: 2020-07-03
湖南龙立机电技术有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a coke oven flue gas semi-dry ammonia method desulfurization process to solve the need to build a desulfurization tower specially proposed in the above background technology, and the desulfurization efficiency is general and cannot reach the standard of ultra-low emissions. The investment cost and burden of the enterprise

Method used

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  • Semi-dry ammonia desulphurization process for coke oven flue gas
  • Semi-dry ammonia desulphurization process for coke oven flue gas
  • Semi-dry ammonia desulphurization process for coke oven flue gas

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Embodiment 1

[0052] There are 2 groups of 4 coke ovens with an annual output of 1.04 million tons, a total of 160 holes, including 38 holes in No. 1 coke oven, 38 holes in No. 2 coke oven, 38 holes in No. 3 coke oven, 46 holes in No. No. 2 coke oven is a group, two flues have one chimney, which is No. 1 chimney, No. 3 and No. 4 coke ovens are a group, two flues have one chimney, which is No. No. chimney for Example 1 description.

[0053] The flue gas volume of No. 1 chimney is 110000Nm3 / h, the highest temperature of coke oven flue gas is 300°C, the lowest is 240°C, the average is 280°C, the inlet concentration of sulfur dioxide is 150mg / m3, and the inlet concentration of nitrogen oxides is 700mg / m3. Include the following steps:

[0054] (1) First, the high-temperature coke oven flue gas enters the heat recovery device for heat exchange, and then enters the flue gas pipeline 1, so that the flue gas temperature is controlled at about 200°C;

[0055] (2) Then, send the coke oven flue gas o...

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Abstract

The invention relates to the technical field of industrial flue waste gas purification treatment, and relates to a semi-dry ammonia desulfurization process for coke oven flue gas. A flue gas pipelineis adopted, an auxiliary steel structure is mounted on the outer wall of the flue gas pipeline through welding and bolt connection; a dust removal station system and an ammonia escape control system are connected to the bottom outer wall, close to one end, of the flue gas pipeline through welding and bolts; the flue gas pipeline is communicated with the dust removal station system and the ammoniaescape control system, and semi-dry ammonia desulfurization systems are installed on the side, close to the ammonia escape control system, of the outer wall of the top of the flue gas pipeline and theside, close to the ammonia escape control system, of the auxiliary steel structure through welding and bolts. The semi-dry ammonia desulphurization process has the beneficial effects that the flue gas pipeline is used as a desulfurization reactor, a desulfurization tower is not needed, the desulfurization tower manufacturing and mounting cost is saved, no waste liquid is generated, and the byproduct is mainly solid ammonium sulfate and can be sold as a chemical raw material.

Description

technical field [0001] The invention relates to the technical field of industrial flue gas purification and treatment, in particular to a coke oven flue gas semi-dry ammonia desulfurization process. Background technique [0002] The air pollutants emitted by the coke oven chimney are the exhaust gas produced after the combustion of coke oven gas, mainly including dust particles, sulfur dioxide, nitrogen oxides, etc. It is one of the most polluting industries, and the treatment of coke oven flue gas pollutants is imminent. [0003] Chinese Patent No. CN201711251283, 7 provides a coke oven flue gas desulfurization process and system. The process includes: after adjusting the temperature and humidity of the coke oven flue gas to a set value, it contacts with a desulfurization catalyst, and the desulfurization catalyst absorbs H2O in the flue gas , SO2 and O2 after catalytic reaction to generate H2SO4. The system includes a flue gas conditioning system, a desulfurization system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/58B01D53/78B01D53/86B01D46/02B01D53/56
CPCB01D53/502B01D46/02B01D53/58B01D53/78B01D53/8625B01D2258/0283B01D2251/2062B01D2251/2067B01D2251/206
Inventor 汤良
Owner 湖南龙立机电技术有限公司
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