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Low-temperature desulfurization and denitration method for boiler flue gas

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

Pending Publication Date: 2019-03-22
湖北申昙环保新材料有限公司
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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 existing coking plant boiler flue gas treatment process. A method for desulfurization and denitrification of boiler flue gas is provided. The processing method has a short process, The advantages of low equipment investment, simple regeneration, low energy consumption, and no secondary pollution

Method used

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  • Low-temperature desulfurization and denitration method for boiler flue gas

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Experimental program
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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 , 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

[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 , 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

[0051] 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

Low-temperature desulfurization and denitration method for boiler flue gas. The invention relates to a desulfurization and denitration method for boiler flue gas. The method is mainly used for solvingthe problem that the existing boiler flue gas desulfurization and denitration are high in operating cost and secondary pollution is caused. According to the method, through adopting the technical scheme that nitrogen oxides and sulfides are removed from the boiler flue gas by a microcrystalline material adsorption method, and the nitrogen oxides and the sulfides in the regenerated flue gas are subjected to oxidation for resource-converting utilization, the above technical problem is better solved; the method can be applied to industrial production of desulfurization and denitration of the boiler 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 boiler 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 boiler 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 used i...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/60B01D53/72B01D47/06B01D53/04
CPCB01D47/06B01D53/04B01D53/60B01D53/72B01D53/75B01D2253/106B01D2258/0283B01D2259/4009Y02A50/20
Inventor 马广伟宋晶孙广亿
Owner 湖北申昙环保新材料有限公司
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