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SCR denitrification process and denitrification device of ammonia injection grid adopting non-unidiameter injection orifices

An ammonia injection grid and SCR reactor technology, which is applied in the field of flue gas purification, can solve the problems of increasing the mixing length of ammonia gas/flue gas, affecting the denitration effect, and uneven amount of ammonia gas, achieving compact structure, good implementation effect, Easy to process effect

Active Publication Date: 2010-02-03
CPI YUANDA ENVIRONMENTAL PROTECTION ENG +1
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Problems solved by technology

This makes the ammonia gas (NH 3 ) amount is uneven, which increases the mixing length of ammonia / flue gas and affects the denitrification effect

Method used

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  • SCR denitrification process and denitrification device of ammonia injection grid adopting non-unidiameter injection orifices

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Embodiment Construction

[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

[0028] 1-Ammonia injection grid; 2-Static mixer; 3-Deflector; 4-Rectifier; 5-First catalyst layer; 6-Second catalyst layer; 7-Standby catalyst layer.

[0029] The SCR denitrification process adopting non-equal-diameter nozzle hole ammonia injection grid of the present invention comprises the following steps: X The flue gas is sent into the ammonia injection grid composed of multiple parallel ammonia injection pipes through the connecting flue. Along the flow direction of ammonia gas, the size of the ammonia injection holes arranged along the axis of the ammonia injection pipe on the ammonia injection grid is gradually reduced. , to ensure that the amount of ammonia ga...

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Abstract

The invention discloses an SCR denitrification process and a denitrification device of an ammonia injection grid adopting non-unidiameter injection orifices. Through the ammonia injection grid adopting the non-unidiameter injection orifices, the diameter size of the ammonia injection orifices is gradually reduced along with the flow direction of ammonia gas so that the quantity of ammonia gas injected by the ammonia injection orifices keeps same in the process of ammonia injection, therefore, the mixed length of ammonia gas and flue gas can not be affected, and the denitrification effect is ensured.

Description

technical field [0001] The invention relates to the technical field of flue gas purification, in particular to an SCR denitrification process and a denitrification device using ammonia injection grids with non-equal-diameter spray holes. Background technique [0002] my country is a big country in energy production and consumption. The primary energy supply is mainly coal, and oil and natural gas resources are in short supply. According to statistics, my country's total energy consumption in 2003 was 1.678 billion tons of standard coal, of which coal accounted for 67.1%, crude oil accounted for 22.7%, natural gas accounted for 2.8%, and renewable energy accounted for 7.3%. [0003] This coal-based primary energy production and consumption structure has brought serious environmental pollution problems and damaged the economic and environmental foundations of sustainable development. Among the various pollutants discharged into the atmosphere from coal combustion, the control...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/76B01D53/56
Inventor 余宇杜云贵隋建才邓佳佳洪燕喻江涛吴其荣何凡秦福初
Owner CPI YUANDA ENVIRONMENTAL PROTECTION ENG
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