Selective non-catalytic reduction denitration process

A non-catalytic and selective technology, applied in the field of flue gas denitrification, can solve the problems of increasing ammonia escape and increasing the amount of denitrification agent, and achieve the effect of solving ammonia escape, low cost and ultra-low emission

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

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Problems solved by technology

[0003] The main purpose of the present invention is to propose a selective non-catalytic reduction denitrification process, which aims to solve the problem that when the selective non-catalytic reduction process is used for flue gas denitrification treatment, in order to improve the denitrification efficiency, the amount of denitrification agent will be increased, resulting in further ammonia escape. growing problem

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0053] (1) Spray ammonia water (with a mass concentration of 20%) to the flue gas to be treated (at a temperature of 850° C.) with a compressed air pressure of 0.4 MPa, and after reducing the nitrogen oxides in the flue gas to be treated, denitrification flue gas is obtained .

[0054] (2) The denitrification flue gas is passed into the semi-dry reaction tower; the slaked lime is slurried at room temperature, and the slurry is atomized by a rotating atomizing disc (rotating speed 15000rph), and then sprayed at a high speed to form a liquid with a particle size of 20-501xm Drops are sprayed in the semi-dry reaction tower, fully mixed with the denitrification flue gas in the semi-dry reaction tower, and reacted at 150°C for 1s to remove SO 2 , HCl and HF to obtain deacidified flue gas.

[0055] (3) Provide a bag filter, the bag filter is provided with a plurality of filter bags; the deacidification flue gas is passed into the bag filter, and the deacidification flue gas passes ...

Embodiment 2

[0058] (1) Spray ammonia water (mass concentration: 15%) to the flue gas to be treated (at a temperature of 900° C.) with a compressed air pressure of 0.4 MPa, and after reducing the nitrogen oxides in the flue gas to be treated, denitrification flue gas is obtained .

[0059] (2) The denitrification flue gas is passed into the semi-dry reaction tower; the slaked lime is slurried at room temperature, and the slurry is atomized by a rotating atomizing disc (rotating speed 15000rph), and then sprayed at a high speed to form a liquid with a particle size of 20-501xm Drops are sprayed in the semi-dry reaction tower, fully mixed with the denitrification flue gas in the semi-dry reaction tower, and reacted at 150°C for 1s to remove SO 2 , HCl and HF to obtain deacidified flue gas.

[0060] (3) Provide a bag filter, the bag filter is provided with a plurality of filter bags; the deacidification flue gas is passed into the bag filter, and the deacidification flue gas passes through t...

Embodiment 3

[0063] (1) Spray ammonia water (with a mass concentration of 25%) to the flue gas to be treated (at a temperature of 950° C.) with a compressed air pressure of 0.4 MPa, and after reducing the nitrogen oxides in the flue gas to be treated, denitrification flue gas is obtained .

[0064] (2) The denitrification flue gas is passed into the semi-dry reaction tower; the slaked lime is slurried at room temperature, and the slurry is atomized by a rotating atomizing disc (rotating speed 15000rph), and then sprayed at a high speed to form a liquid with a particle size of 20-501xm Drops are sprayed in the semi-dry reaction tower, fully mixed with the denitrification flue gas in the semi-dry reaction tower, and reacted at 150°C for 1s to remove SO 2 , HCl and HF to obtain deacidified flue gas.

[0065] (3) Provide a bag filter, the bag filter is provided with a plurality of filter bags; the deacidification flue gas is passed into the bag filter, and the deacidification flue gas passes ...

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Abstract

The invention discloses a selective non-catalytic reduction denitration process which comprises the following steps: performing selective non-catalytic reduction denitration treatment on flue gas to be treated to obtain denitration flue gas; carrying out deacidification treatment on the denitrified flue gas to obtain deacidified flue gas; carrying out dust removal treatment on the deacidified flue gas to obtain dust-removed flue gas; and carrying out deamination treatment on the dedusted flue gas to obtain treated flue gas. According to the selective non-catalytic reduction denitration process provided by the invention, the deamination treatment is added after the selective non-catalytic reduction denitration treatment, so that NH3 generated by the selective non-catalytic reduction denitration treatment is removed, the problem of ammonia escape is solved, and the ultra-low emission requirement is met at lower cost.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification, in particular to a selective non-catalytic reduction denitrification process. Background technique [0002] When performing flue gas denitrification, the existing technology uses a selective non-catalytic reduction process for denitrification treatment. This process has a low denitrification efficiency and has the problem of excessive ammonia escape. In order to improve the denitrification efficiency, the concentration of the denitrification agent will be increased. The dosage will lead to further increase of ammonia escape. Contents of the invention [0003] The main purpose of the present invention is to propose a selective non-catalytic reduction denitrification process, which aims to solve the problem that when the selective non-catalytic reduction process is used for flue gas denitrification treatment, in order to improve the denitrification efficiency, the amount of denit...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/78B01D53/80B01D53/86B01D53/68B01D53/58B01D53/56B01D53/50B01D53/02B01D46/02
CPCB01D53/75B01D53/78B01D53/56B01D53/58B01D53/8634B01D53/02B01D53/80B01D53/502B01D53/68B01D46/023B01D2251/2062B01D2251/2067B01D2251/404B01D2255/20761B01D2255/2073B01D2253/102B01D2258/0283
Inventor 陈壁
Owner SHENZHEN HUAMING ENVIRONMENTAL PROTECTION TECH CO LTD
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