Low-temperature desulfurization and denitrification method for coke oven flue gas

A desulfurization and denitrification, 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: 2019-03-15
铜陵泰富特种材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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, and a low-temperature desulfurization and denitrification method for coke oven flue gas is provided. Short, low equipment investment, simple regeneration, low energy consumption, no secondary pollution

Method used

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  • Low-temperature desulfurization and denitrification method for coke oven flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 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 , enter the waste heat boiler to generate steam, and the temperature of the flue gas is reduced to about 180°C; the flue gas at 180°C is cooled to 50°C by spraying, the spray water is recycled, and part of the waste water is neutralized and then removed to the biochemical system; After the flue gas passes through the demisting equipment, it 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 adsorption tower has a diameter of 4.8 meters and a height of 12.0 meters; after the flue gas removes sulfides and nitrogen oxides, it enters the self-heat exchanger, and after heat exchange with the hot flue gas, it reaches above 100°C and enters the chimney emission, the nitrogen oxide content in ...

Embodiment 2

[0048] 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 , into the waste heat boiler to generate steam at 150°C, and the temperature of the flue gas is reduced to about 120°C; the flue gas at 120°C is cooled to 40°C by spraying, and the spray water is recycled, and part of the waste water is neutralized and then removed to the biochemical system; the temperature is lowered The final flue gas enters the adsorption tower after passing through the demisting equipment; 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 oxides, it enters the self-heat exc...

Embodiment 3

[0050] The specific implementation is as attached figure 1 The device process shown, 140,000 cubic meters of flue gas at 140°C, the nitrogen oxide content is 450mg / m 3 , the sulfide content is 200 mg / m 3 , into the waste heat boiler to generate steam at 160°C, and the temperature of the flue gas is reduced to about 110°C; the flue gas at 110°C is cooled to 50°C by spraying, and the spray water is recycled, and part of the waste water is neutralized and then removed to the biochemical system; cooling The final flue gas enters the adsorption tower after passing through the demisting equipment; 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 sulfides and nitrogen oxides, it enters the self-heat exchanger, and aft...

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Abstract

The invention relates to a low-temperature desulfurization and denitrification method for coke oven flue gas. The invention mainly aims at solving the problems of high operating cost and secondary pollution of conventional desulfurization and denitrification of the coke oven flue gas. The low-temperature desulfurization and denitrification method disclosed by the invention adopts the technical scheme that nitrogen oxide and sulfide in the coke oven flue gas are removed according to a microcrystalline material adsorption method; nitrogen oxide and sulfide in regenerated flue gas are oxidized and recycled, the technical problems are better solved. The method can be used in the industrial production of desulfurization and denitrification of the 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 low-temperature 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 me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/78B01D49/00B01D53/56
CPCB01D53/8625B01D49/00B01D53/04B01D53/78B01D2257/302
Inventor 周稳华虞文胜马广伟李腾姣
Owner 铜陵泰富特种材料有限公司
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