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Ammonia-free desulfurization and denitrification method of boiler smoke

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

Inactive Publication Date: 2019-03-12
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 existing coking plant boiler flue gas treatment process. It provides a method for boiler flue gas desulfurization and denitrification without ammonia. The treatment method has a process flow Short, low equipment investment, simple regeneration, low energy consumption, no secondary pollution

Method used

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  • Ammonia-free desulfurization and denitrification method of boiler smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 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 self-heat exchanger and exchanges heat with the cold flue gas entering the chimney, and the temperature drops to about 110°C; the flue gas at 110°C is cooled to 50°C by spraying, and the spraying water is recycled, and part of the waste water is neutralized Finally, go 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 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 chimne...

Embodiment 2

[0053] 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 self-heat exchanger and exchanges heat with the cold flue gas entering the chimney, and the temperature drops to about 110°C; the flue gas at 110°C is cooled to 40°C by spraying, and the spraying water is recycled, and part of the waste water is neutralized Finally, go to the chemical production and salt extraction workshop to produce ammonium nitrate and ammonium sulfate, and 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;...

Embodiment 3

[0055] 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 an ammonia-free desulfurization and denitrification method of boiler smoke. The problems that existing boiler smoke desulfurization and denitrification are high in running cost, and generate secondary pollution are mainly solved. According to the ammonia-free desulfurization and denitrification method of the boiler smoke, nitric oxide and sulfide in the boiler smoke are removed through an adsorption method, and nitric oxide and sulfide in regenerated smoke are subjected to salt manufacturing treatment. According to the technical scheme, by adopting the ammonia-free desulfurization and denitrification method of the boiler smoke, the problems are well solved, and the method can be used for industrial production of desulfurization and denitrification of the boiler smoke.

Description

technical field [0001] The invention belongs to the technical field of desulfurization and denitrification, and in particular relates to an ammonia-free desulfurization and denitrification method for 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 wi...

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 虞文胜周稳华马广伟
Owner 铜陵泰富特种材料有限公司
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