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Low temperature desulfurization and denitrification method of coke oven flue gas

A desulfurization, denitrification and flue gas technology, applied in the field of desulfurization and denitrification, can solve the problems of secondary pollution and high operating costs

Inactive Publication Date: 2019-05-10
铜陵泰富特种材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The technical problem to be solved by the present invention is the technical problem of high operating cost and secondary pollution in the coke oven flue gas treatment process of the existing coking plant. A method for low-temperature desulfurization and denitrification of coke oven flue gas is provided. The treatment method has the following advantages: The advantages of short process, low equipment investment, simple regeneration, low energy consumption and no secondary pollution

Method used

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  • Low temperature desulfurization and denitrification method of coke oven flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 160,000 cubic meters of flue gas at 240°C, with a nitrogen oxide content of 500mg / m 3 , the sulfide content is 200 mg / m 3 , the flue gas enters the denitrification tower, at 240°C, under the action of the ZSM-5 molecular sieve catalyst, the nitrogen oxides are reduced to nitrogen, the flue gas after the reaction enters the cooling tower, and is cooled to 50°C by spraying, and the spray water is recycled through , after part of the wastewater is neutralized, it goes to the biochemical system; the flue gas after cooling passes through the demisting equipment and enters the adsorption tower; three 200m 3 The adsorption tower, two open and one standby, each adsorption tower is filled with 120m 3 Microcrystalline material, total 360 m 3 Microcrystalline material mordenite; the specification of the adsorption tower is 4.8 meters in diameter and 12.0 meters in height; after the flue gas removes sulfide and nitrogen oxides, it enters the chimney for emission, and the nitrogen...

Embodiment 2

[0049] The specific implementation is as attached figure 1 The shown device flow, 150,000 cubic meters of flue gas at 260°C, the nitrogen oxide content is 400mg / m 3 , the sulfide content is 100 mg / m 3 , the flue gas enters the denitrification tower, at 240°C, under the action of ZSM-5 molecular sieve catalyst, the nitrogen oxides are reduced to nitrogen, the flue gas after the reaction enters the cooling tower, sprays and cools down to 40°C, and the spray water is recycled. After part of the wastewater is neutralized, it goes to the biochemical system; the cooled flue gas passes through the demisting equipment and enters the adsorption tower; three 200m 3 The adsorption tower, two open and one standby, each adsorption tower is filled with 120m 3 Microcrystalline material, total 360 m 3 Microcrystalline material ZSM-5 molecular sieve; the specification of the adsorption tower is 4.8 meters in diameter and 12.0 meters in height; after the flue gas removes sulfide and nitrogen...

Embodiment 3

[0051] The specific implementation is as attached figure 1 The device process shown, 140,000 cubic meters of flue gas at 300°C, the nitrogen oxide content is 450mg / m 3 , the sulfide content is 200 mg / m 3 , the flue gas enters the denitrification tower, and at 300°C, under the action of the copper-loaded ZSM-5 molecular sieve catalyst, the nitrogen oxides are reduced to nitrogen, and the flue gas after the reaction enters the waste heat boiler to generate steam at 160°C, and the flue gas enters the self-exchange The heater exchanges heat with the cold flue gas entering the chimney, and the temperature drops to about 110°C; the temperature of the flue gas at 110°C is reduced to about 110°C through the flue gas; the temperature of the flue gas at 110°C is cooled to 50°C by spraying, and the spraying The water is recycled, part of the waste water is neutralized, and then goes to the biochemical system; the cooled flue gas passes through the demisting equipment and enters the adso...

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Abstract

The invention relates to a desulfurization and denitrification method of coke oven flue gas and mainly solves the problem that existing desulfurization and denitrification operation for coke oven fluegas has high cost and causes secondary pollution. According to the technical scheme, the method herein includes: allowing coke oven flue gas to enter a denitrifying column with a denitrifying catalyst, allowing the flue gas to enter a cooling column after catalytic reduction, cooling by spraying, removing dust, allowing the flue gas to enter an adsorbing column with a microcrystalline adsorbent to adsorb sulfides and oxygen nitrides, and discharging the flue gas via a chimney; subjecting the oxygen nitrides and sulfides in the regenerated flue gas to salt manufacturing. The above problem is well solved by using the method; the method is suitable for the industrial production of desulfurization and denitrification of coking flue gas.

Description

technical field [0001] The invention belongs to the technical field of desulfurization and denitrification, and in particular relates to a method for desulfurization and denitrification of coke oven flue gas. Background technique [0002] SO 2 and NO X Both are important air pollutants in my country. Excessive emissions will cause smog, acid rain and photochemical smog, which seriously endanger the ecological environment and human health. The combustion of fossil fuels is SO 2 and NO X main source of . Coal is the most important natural energy in my country. As the second largest coal-consuming field in China, coal coking is one of the main pollution sources in the field of industrial coal use, and coke oven flue gas is an important pollution source of the atmosphere. [0003] At present, wet desulfurization technology and semi-dry desulfurization technology represented by ammonia method, lime / limestone method, double alkali method and magnesium oxide method are widely ...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/78B01D49/00B01D53/56
Inventor 周稳华马广伟
Owner 铜陵泰富特种材料有限公司
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