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Selective catalytic reduction denitrification equipment and method

A selective and denitrification technology, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., can solve the problem of non-uniform flue gas

Active Publication Date: 2022-07-08
CPI YUANDA ENVIRONMENTAL PROTECTION ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been found that the flue gas is not homogeneous in the flue

Method used

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  • Selective catalytic reduction denitrification equipment and method
  • Selective catalytic reduction denitrification equipment and method
  • Selective catalytic reduction denitrification equipment and method

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Experimental program
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Embodiment

[0121] like figure 1 As shown, the size of the flue where the ammonia injection grill is located is 14250×3600mm, and the full-section flowmeter is arranged in the horizontal section of the inlet flue. The sampling probe of the inlet nitrogen oxide detector is arranged 1.5m upstream of the ammonia injection grille. There are three sampling probes in total, such as image 3 shown. The ammonia injection grille has three ammonia injection zone parent pipes, and each parent pipe is equipped with an ammonia-air mixer regulating valve. A guide plate is arranged in the inlet flue, and a rectifying grid and three layers of catalyst are arranged in the denitration reactor. The horizontal section of the outlet flue is arranged as follows Figure 4 and Figure 5 Three outlet nitrogen oxide detectors and three outlet ammonia concentration detectors are shown. The air volume of the ammonia-air mixture is 4000Nm 3 / h; the emission standard requires the outlet nitrogen oxide concentrat...

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Abstract

The invention provides a matrix-type selective catalytic reduction flue gas denitration equipment, which has the same distribution of ammonia injection branch parent pipe matrix upstream of the catalytic reduction reactor and effluent nitrogen oxide concentration detector downstream of the catalytic reduction reactor Matrix and Ammonia Concentration Detector Matrix. The invention also provides a matrix-type selective catalytic reduction flue gas denitration method. The invention can realize accurate measurement and feedback control of flue gas flow, nitrogen oxides and ammonia concentration, so as to reduce the amount of ammonia injection to the greatest extent and eliminate the problem of high ammonia escape under the condition of meeting the requirement of reaching the emission standard.

Description

technical field [0001] The invention relates to the field of selective catalytic reduction and denitration, in particular, to a selective catalytic reduction and denitration equipment and a selective catalytic reduction and denitration method. Background technique [0002] Nitrogen oxides are one of the main sources of air pollution. A large amount of nitrogen oxides in the exhaust gas of various industries. If nitrogen oxides are not removed and discharged directly, they will cause serious harm to the atmospheric environment. The selective catalytic reduction (SCR) denitration process is widely used to remove nitrogen oxides from exhaust gas. [0003] Taking the denitrification of waste gas produced by the combustion of coal-fired power plants as an example, the typical process of SCR denitration process is: after the flue gas containing nitrogen oxides is drawn from the outlet of the boiler economizer, it enters the flue of the denitration reactor; in the flue, After th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/90B01D53/56
CPCB01D53/90B01D53/8631B01D2251/2062B01D2258/0283B01D53/56
Inventor 周川袁亮吴其荣王琴王进罗鹏熊健周川雄
Owner CPI YUANDA ENVIRONMENTAL PROTECTION ENG