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Desulfurization and denitration method of sintering flue gas

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

Inactive Publication Date: 2019-04-05
山东洲蓝环保科技有限公司
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  • 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 process of sintering flue gas treatment in existing iron and steel plants. It provides a method for low-temperature desulfurization and denitrification of sintering flue gas. , low equipment investment, simple regeneration, low energy consumption, and no secondary pollution

Method used

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  • Desulfurization and denitration method of sintering flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1.6 million 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 ch...

Embodiment 2

[0049] The specific implementation is as attached figure 1 The shown device flow, 1.5 million 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 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 oxides, it enters the self-hea...

Embodiment 3

[0051] The specific implementation is as attached figure 1 The shown device flow, 1.4 million cubic meters of flue gas at 140°C, the nitrogen oxide content is 450mg / m 3 , the sulfide content is 200 mg / m 3 , enter waste heat sintering, generate steam at 160°C, and the temperature of 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 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 after heat ex...

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Abstract

The invention relates to a desulfurization and denitration method of sintering flue gas and mainly solves the problem that existing sintering flue gas desulfurization and denitration are high in operation cost and generate secondary pollution. The method includes following steps: recording sintering flue gas containing sulfide and nitrogen oxide guided out from a sintering flue as material flow A;utilizing waste heat of the material flow A to generate steam, and cooling flue gas to form material flow B; allowing the material flow B to enter a heat exchanger, and exchanging heat with flue gasgoing to a chimney to form material flow C; allowing the material flow C to enter a cooling tower, and cooling and dedusting to form material flow D; allowing the material flow D to enter an adsorption tower containing a microcrystalline adsorbent, wherein material flow E is formed after the sulfide and the nitrogen oxide are adsorbed; exchanging heat of the material flow E with that of the material flow C, rising temperature of the material flow E, and allowing the same to enter the chimney for emission. The above problem is solved well, and the method can be used for industrial production ofsteelwork flue gas desulfurization and denitration.

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 sintering 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 sintering 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): B01D53/86B01D53/56B01D53/48B01D53/50B01D53/78B01D53/02B01D46/00F23J15/06F23J15/04F23J15/08
CPCB01D46/0036B01D53/02B01D53/48B01D53/502B01D53/78B01D53/8628B01D2251/102B01D2251/104B01D2251/106B01D2255/104B01D2255/2061B01D2255/2063B01D2255/2065B01D2255/20761B01D2255/502B01D2255/504B01D2257/206B01D2257/30B01D2257/40B01D2258/0283B01D2259/40092F23J15/04F23J15/06F23J15/08Y02E20/30
Inventor 王伟马广伟梁军
Owner 山东洲蓝环保科技有限公司
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