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Flue gas denitration and deacidification process and flue gas denitration and deacidification integrated system

A flue gas and denitration technology, applied in gas treatment, chemical instruments and methods, emission prevention, etc., can solve problems such as excessive ammonia escape, and achieve the effects of avoiding secondary pollution, low cost, and simple operation.

Inactive Publication Date: 2022-05-10
SHENZHEN HUAMING ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to propose a flue gas denitrification and deacidification process and a flue gas denitrification and deacidification integrated system, aiming to solve the problem of excessive ammonia escape in the existing denitrification and deacidification process

Method used

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  • Flue gas denitration and deacidification process and flue gas denitration and deacidification integrated system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) The untreated flue gas produced by waste incineration in a power plant, the flue gas volume (hourly average value) is 56000Nm 3 , where the NOx (hourly average) content is 350mg / Nm 3 , lead the flue gas to be treated to the target space of the boiler, spray ammonia water into the target space of the boiler, the feeding rate of ammonia water (hourly average value) is 30L / h, and the temperature in the target space is 900°C to obtain denitrification flue gas, denitrification The ammonia content (hourly average) in the flue gas is 25mg / Nm 3 ;

[0052] (2) Drain the denitrification flue gas to the semi-dry reaction tower to react with slaked lime for deacidification treatment to obtain deacidification flue gas, and then divert the deacidification flue gas to the first dust collector for dust removal treatment to obtain Dust removal flue gas from flue;

[0053] (3) Spray the atomized acetic acid solution in the smoke outlet flue, the mass concentration of the acetic ac...

Embodiment 2

[0056] (1) The untreated flue gas produced by waste incineration in a power plant, the flue gas volume is 56000Nm 3 (hourly average value), the NOx content of which is 350mg / Nm 3 (hourly average value), the flue gas to be treated is diverted to the target space of the boiler, and urea is sprayed into the target space of the boiler. The feeding rate of urea is 35L / h (hourly average value), and the temperature in the target space is 850°C. Flue gas, the ammonia content (hourly average value) in the denitrification flue gas is 27mg / Nm 3 ;

[0057] (2) Drain the denitrification flue gas to the semi-dry reaction tower to react with slaked lime for deacidification treatment to obtain deacidification flue gas, and then divert the deacidification flue gas to the first dust collector for dust removal treatment to obtain Dust removal flue gas from flue;

[0058] (3) Spray atomized acetic acid solution in the smoke outlet flue, the mass concentration of the acetic acid solution is 10%...

Embodiment 3

[0061] (1) The untreated flue gas produced by waste incineration in a power plant, the flue gas volume (hourly average value) is 56000Nm 3 , where the NOx content (hourly average value) is 350mg / Nm 3 , lead the flue gas to be treated to the target space of the boiler, spray ammonia water into the target space of the boiler, the feeding rate of ammonia water (hourly average value) is 25L / h, and the temperature in the target space is 950°C to obtain denitrification flue gas, denitrification The ammonia content (hourly average) in the flue gas is 22mg / Nm 3 ;

[0062] (2) Drain the denitrification flue gas to the semi-dry reaction tower to react with slaked lime for deacidification treatment to obtain deacidification flue gas, and then divert the deacidification flue gas to the first dust collector for dust removal treatment to obtain Dust removal flue gas from flue;

[0063] (3) spray the hypochlorous acid solution after the atomization in the smoke outlet flue, the mass conce...

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Abstract

The invention discloses a flue gas denitration and deacidification process and a flue gas denitration and deacidification integrated system, and relates to the technical field of flue gas pollutant removal. The flue gas denitration and deacidification process comprises the following steps: S10, sequentially carrying out denitration, deacidification and dust removal treatment on flue gas to be treated to obtain dust-removed flue gas; s20, enabling the dust-removed flue gas to be in contact with an atomized acidic material for reaction, and performing deamination treatment on the dust-removed flue gas to obtain deaminated flue gas; and S30, the deaminated flue gas is subjected to dust removal treatment, and dischargeable flue gas is obtained. The denitration and deacidification process provided by the invention can effectively solve the problem that ammonia escape is excessive and exceeds the standard, avoids secondary pollution to the atmosphere, and is simple to operate and relatively low in cost.

Description

technical field [0001] The invention relates to the technical field of flue gas pollutant removal, in particular to a flue gas denitrification and deacidification process and a flue gas denitrification and deacidification integrated system. Background technique [0002] At present, the denitrification and deacidification process of flue gas produced by waste incineration power plants is mostly: first denitrification of flue gas, then deacidification, and finally dust removal to obtain standard flue gas that can be discharged to the chimney. With the increasingly severe environmental protection, the NOx emission limit is getting lower and lower, and many key areas require it to be reduced to 50mg / Nm 3 , and even some areas must reach 35mg / Nm 3 , in order to meet this requirement, when denitrifying the flue gas produced by waste incineration power plants, in order to achieve a good NOx removal effect, the amount of denitrification agent (nitrogen-containing substances such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/78B01D53/81B01D53/68B01D53/58B01D53/56B01D53/50B01D46/02F23J15/02F23J15/04F23J15/00
CPCB01D53/75B01D53/78B01D53/56B01D53/58B01D53/81B01D53/508B01D53/685B01D46/02B01D46/023F23J15/006F23J15/02F23J15/025F23J15/04B01D2251/108B01D2251/2067B01D2251/2062B01D2251/404B01D2258/0283F23J2215/10F23J2215/30
Inventor 陈壁
Owner SHENZHEN HUAMING ENVIRONMENTAL PROTECTION TECH CO LTD
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