Process and system applied to super purification treatment of domestic garbage incineration flue gas

A technology of domestic waste incineration and treatment process, which is applied in the field of ultra-clean treatment process and system of domestic waste incineration flue gas, can solve problems such as difficult to achieve, and achieve the effects of improving emission indicators, excellent adsorption, and efficient adsorption.

Inactive Publication Date: 2018-08-24
重庆康达实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relying on this process combination, it can meet the national emission standard GB18485-2014, but it is difficult to meet the EU emission standard 2000 / 76 / EC

Method used

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  • Process and system applied to super purification treatment of domestic garbage incineration flue gas
  • Process and system applied to super purification treatment of domestic garbage incineration flue gas
  • Process and system applied to super purification treatment of domestic garbage incineration flue gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] This embodiment provides a process for ultra-clean treatment of domestic waste incineration flue gas, including the following steps:

[0054] (1) Perform SNCR denitrification treatment on the flue gas in the waste heat boiler, wherein, in the SNCR treatment, ammonia water with a concentration of 40% is used as a reducing agent and sprayed into the high temperature area of ​​the flue gas;

[0055] (2) Under the irradiation of ultraviolet light, the flue gas after the denitrification treatment is adsorbed by the composite adsorbent I;

[0056] (3) The flue gas after the adsorption treatment is sequentially subjected to semi-dry desulfurization treatment and bag dust removal treatment, wherein the semi-dry method is a rotary spray method;

[0057] (4) Add ozone to the flue gas after dedusting, the molar ratio of the amount of ozone added to the nitrogen oxides in the flue gas is 1:0.8, to obtain a mixed gas, and then use a 5% concentration of sodium hydroxide solution to t...

Embodiment 2

[0075] This embodiment provides a process for ultra-clean treatment of domestic waste incineration flue gas, including the following steps:

[0076] (1) Perform SNCR denitrification treatment on the flue gas in the waste heat boiler, wherein 40% concentration of urea is used as the reducing agent in the SNCR treatment and sprayed into the high temperature area of ​​the flue gas;

[0077] (2) Under the irradiation of ultraviolet light, the flue gas after the denitrification treatment is adsorbed by the composite adsorbent I;

[0078] (3) The flue gas after the adsorption treatment is sequentially subjected to semi-dry desulfurization treatment and bag dust removal treatment, wherein the semi-dry method is a rotary spray method;

[0079] (4) Add ozone to the flue gas after dust removal, the molar ratio of the amount of ozone added to the nitrogen oxides in the flue gas is 1:0.5, to obtain a mixed gas, and then use 5% concentration of sodium hydroxide solution to treat the mixed ...

Embodiment 3

[0091] This embodiment provides a process for ultra-clean treatment of domestic waste incineration flue gas, including the following steps:

[0092] (1) Perform SNCR denitrification treatment on the flue gas in the waste heat boiler, wherein, in the SNCR treatment, ammonia water with a concentration of 40% is used as a reducing agent and sprayed into the high temperature area of ​​the flue gas;

[0093] (2) Under the irradiation of ultraviolet light, the flue gas after the denitrification treatment is adsorbed by the composite adsorbent I;

[0094] (3) The flue gas after the adsorption treatment is sequentially subjected to semi-dry desulfurization treatment and bag dust removal treatment, wherein the semi-dry method is a rotary spray method;

[0095] (4) Add ozone to the flue gas after dedusting, the molar ratio of the amount of ozone added to the nitrogen oxides in the flue gas is 1:0.8, to obtain a mixed gas, and then use a 5% concentration of sodium hydroxide solution to t...

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Abstract

The invention provides a process applied to super purification treatment of domestic garbage incineration flue gas. The process comprises the following steps: (1) carrying out SNCR denitration treatment on the flue gas in a waste heat boiler; (2) carrying out adsorption treatment on the flue gas subjected to denitration treatment by using a compound adsorbent I under ultraviolet irradiation; (3) successively carrying out semi-dry process desulphurization treatment and cloth bag dust removal treatment on the flue gas subjected to adsorption treatment; (4) adding ozone into the flue gas subjected to dust removal to obtain mixed gas, then eluting the mixed gas by using alkaline liquid; and (5) carrying out secondary adsorption on the flue gas obtained by eluting by using a compound adsorbentII. Through the process, the flue gas is successively subjected to SNCR denitration treatment, primary adsorption treatment, semi-dry process desulphurization treatment, cloth bag dust removal treatment, ozone oxidization treatment, eluting treatment via alkaline liquid and secondary adsorption treatment, so that the emission index of the treated flue gas is greatly improved and far exceeds the national environmental protection requirement.

Description

technical field [0001] The invention relates to the field of domestic waste incineration flue gas treatment, in particular to an ultra-clean treatment process and system for domestic waste incineration flue gas. Background technique [0002] In recent years, my country's urbanization process has accelerated, and the number and scale of cities have continued to expand. However, due to the serious lag in environmental protection infrastructure, the pollution of urban ecological environment by urban waste has become increasingly serious. It is estimated that by 2020, the amount of urban waste generated will reach 323 million tons, and the harmless treatment of waste is imminent. The methods of dealing with waste incineration in cities mainly include landfill and incineration, but they need to occupy a large amount of land and are likely to cause secondary pollution. In particular, incineration will produce more harmful substances, such as the exhaust gas produced by waste In a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/00B01D53/02B01D53/50B01D53/56B01D53/79B01J20/24B01J20/20B01J20/30F23J15/00F23J15/02F23J15/04
CPCB01D53/007B01D53/02B01D53/50B01D53/56B01D53/75B01D53/79B01D2251/104B01D2251/2062B01D2251/2067B01D2251/304B01D2251/604B01D2258/0291B01D2259/804B01J20/04B01J20/041B01J20/043B01J20/06B01J20/08B01J20/12B01J20/14B01J20/165B01J20/20B01J20/24F23J15/003F23J15/006F23J15/02F23J15/025F23J15/04
Inventor 顾卫平江洪陈杨程钦龙肖瑜
Owner 重庆康达实业有限公司
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