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Solid waste incineration flue gas desulfurization and denitrification process

A technology for desulfurization, denitrification and incineration of flue gas, applied in gas treatment, other chemical processes, separation methods, etc., can solve the problems of poor flue gas purification effect, poor adsorption performance, and waste reduction.

Active Publication Date: 2021-12-24
江苏东本环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of modern industry and the rapid advancement of urbanization, the amount of urban waste generated in my country is increasing day by day. Up to now, the total amount of solid waste piled up in urban waste has reached 7 billion tons, and it is increasing at a rate of about 9% every year. Incineration as solid A method of waste treatment, which can convert solid waste into simple inorganic substances such as carbon dioxide and water, greatly reducing the amount of waste, and at the same time completely killing various pathogens, but the sulfur-containing and nitrate-containing flue gas produced by incineration may cause secondary pollution
[0003] Excessive discharge of flue gas containing sulfur and nitrate will seriously endanger the environment and human health. Compared with the traditional desulfurization and denitrification series process, the short-process integrated desulfurization and denitrification technology has attracted wide attention. The adsorption method is an effective technical way to purify the flue gas of solid waste incineration one, however due to SO 2 There is a competitive adsorption between NOx (nitrogen oxides), which leads to poor adsorption performance of the adsorbent on NOx and poor flue gas purification effect

Method used

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  • Solid waste incineration flue gas desulfurization and denitrification process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Solid waste incineration flue gas demonide denitration process:

[0033] S1: After cooling the high temperature flue gas produced by the solid waste incineration, then spray treatment with 5 wt% sodium hydroxide solution, and control the flue gas temperature after spray treatment treatment is 150 ° C;

[0034] S2: The adsorbent is filled with an adsorbent in the desulfurization denitration apparatus, and the adsorbent is preacted in the adsorbent at 120 ° C, and the treatment time is 10 min;

[0035] S3: Top the treated flue gas into the desulfurized denitration apparatus, controlling the flue gas flow rate of 400 ml / min, and the flue gas after the adsorbent treatment is removed after removal of the fog;

[0036] Among them, the adsorbent is a three-layer nuclear shell structure, including outer layers, intermediate layers, and nucleus;

[0037] Outer layer by MnO 2 NA 2 CO 3 Γ-al 2 O 3 composition;

[0038] The intermediate layer is SAPO-34 molecular sieve layer;

[0039...

Embodiment 2

[0043] Solid waste incineration flue gas demonide denitration process:

[0044] S1: After cooling the high temperature flue gas produced by solid waste incineration, then spray treatment with 5 wt% sodium hydroxide solution, and control the flue gas temperature after spray treatment treatment is 160 ° C;

[0045] S2: The adsorbent is filled with an adsorbent in the desulfurization denitration apparatus, and the adsorbent is preacted in the adsorbent at 120 ° C, and the treatment time is 10 min;

[0046] S3: Top the treated flue gas into the desulfurized denitration apparatus, controlling the flue gas flow rate of 400 ml / min, and the flue gas after the adsorbent treatment is removed after removal of the fog;

[0047] Among them, the adsorbent is a three-layer nuclear shell structure, including outer layers, intermediate layers, and nucleus;

[0048] Outer layer by MnO 2 NA 2 CO 3 Γ-al 2 O 3 composition;

[0049] The intermediate layer is SAPO-34 molecular sieve layer;

[0050] The ...

Embodiment 3

[0054] Solid waste incineration flue gas demonide denitration process:

[0055] S1: After cooling the high temperature flue gas produced by solid waste incineration, then spray treatment with 5 wt% sodium hydroxide solution, and control the flue gas temperature after spray treatment is 120 ° C;

[0056] S2: The adsorbent is filled with an adsorbent in the desulfurization denitration apparatus, and the adsorbent is poured at 120 ° C, and the treatment time is 5 min;

[0057] S3: Top the treated flue gas into the desulfurized denitration apparatus, controlling the flue gas flow rate of 400 ml / min, and the flue gas after the adsorbent treatment is removed after removal of the fog;

[0058] Among them, the adsorbent is a three-layer nuclear shell structure, including outer layers, intermediate layers, and nucleus;

[0059] Outer layer by MnO 2 NA 2 CO 3 Γ-al 2 O 3 composition;

[0060] The intermediate layer is SAPO-34 molecular sieve layer;

[0061] The nucleus is made from the nuc...

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Abstract

The invention relates to the technical field of gas purification, and in particular, relates to a solid waste incineration flue gas desulfurization and denitrification process, wherein the process comprises the steps: cooling high-temperature flue gas generated by solid waste incineration, spraying alkali liquor, introducing the treated flue gas into desulfurization and denitrification equipment, filling desulfurization and denitrification equipment with a pre-activated adsorbent, and demisting the flue gas treated by the adsorbent to obtain purified flue gas. Tests show that the solid waste incineration flue gas desulfurization and denitrification process can greatly reduce sulfur-containing and nitrate-containing gases in the flue gas generated by solid waste incineration, and has excellent purification efficiency, the desulfurization efficiency is greater than or equal to 98%, and the denitrification efficiency is greater than or equal to 86%.

Description

Technical field [0001] The present invention relates to the field of gas purification techniques, in particular a solid waste incineration flue gas desulfurized denitration process. Background technique [0002] With the rapid advancement of modern industrial development and urbanization, my country's urban waste generation is increasing. As of now, the total amount of solid waste in urban waste has been as high as 7 billion tons, and the increase of about 9% is incremented as solids each year. One method of waste treatment, the solid waste can be converted into simple or organic substances such as carbon dioxide and water, which greatly reduces waste volume, and thoroughly kills various pathogens, but the sulfur-containing-containing smoke-containing smoke-containing smoke produced by incineration may result in secondary pollution. . [0003] Excessive emissions with sulfur-containing smoke will seriously endanger the environment and human health, compared to traditional desulfu...

Claims

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Application Information

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IPC IPC(8): B01D53/02B01D53/04B01D53/78B01D53/50B01D53/56B01D53/60B01J20/20B01J20/30
CPCB01D53/02B01D53/04B01D53/78B01D53/50B01D53/56B01D53/60B01J20/06B01J20/08B01J20/20B01J20/205B01J20/02B01J20/16B01D2258/0283B01D2251/304B01D2251/604B01D2253/1124B01D2253/112B01D2253/102B01D2253/116B01D2257/302B01D2257/404B01J2220/4806B01J2220/42
Inventor 浦东山刘晓霞
Owner 江苏东本环保工程有限公司
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