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Efficient denitration agent for waste incineration flue gas and preparation method of efficient denitration agent

A technology of waste incineration and denitration agent, which is applied in separation methods, chemical instruments and methods, gas treatment, etc., and can solve the problem of high denitration cost

Pending Publication Date: 2022-06-24
SHOUGANG ENVIRONMENTAL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] This application provides a high-efficiency denitrification agent for waste incineration flue gas and its preparation method, in order to solve the technical problem of high cost of denitrification of waste incineration flue gas

Method used

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  • Efficient denitration agent for waste incineration flue gas and preparation method of efficient denitration agent
  • Efficient denitration agent for waste incineration flue gas and preparation method of efficient denitration agent

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preparation example Construction

[0033] In the second aspect, the present application provides the preparation method of the denitration agent described in the first aspect, the method comprising the following steps:

[0034] Obtain the powder of main denitration agent, catalyst, temperature assistant and other assistants respectively;

[0035] The powders of the main denitration agent, the catalyst, the temperature aid and the other aids are mixed and stirred to obtain a denitration agent.

[0036] Specifically, weigh the main reducing agent, catalyst, auxiliary agent and other components in corresponding mass parts, and grind them into fine powders of 10-200 meshes respectively, and then add the ground fine powders to the high-speed paddle according to their respective mass parts. Mix in a blender. The linear speed of the paddle agitator is 20-40m / s, and the stirring time is 2-5 minutes, and finally a fine powdery high-efficiency denitrification agent of 10-200 mesh is obtained. The fineness of the denitr...

Embodiment 1

[0046]This embodiment provides an efficient denitrification agent for waste incineration flue gas. In terms of mass fraction, the components of the denitration agent include: urea particles: 91%, iron oxide agent: 3%, sodium carbonate agent: 3% % and potassium permanganate agent: 3%.

[0047] The preparation method of the denitration agent, the method comprises the following steps: respectively obtaining the powder of the main denitration agent, the catalyst, the temperature assistant and other assistants; Mixing and stirring with the powder of the other auxiliary agents to obtain the denitration agent; wherein, the fineness of the powder is 10-200 mesh. Specifically, the urea particles are ground into powder, and then the four substances are added to the high-speed paddle mixer for mixing. The linear speed of the paddle is set to 20m / s, and the stirring time is 5 minutes. Finally, the mixing is uniform. The powdered high-efficiency denitrification agent 1.

Embodiment 2

[0049] This embodiment provides an efficient denitrification agent for waste incineration flue gas. In terms of mass fraction, the components of the denitration agent include: urea particles: 85%, iron oxide agent: 5%, sodium carbonate agent: 5% % and Toner Potion: 5%. Others are the same as in Example 1, and finally form a uniformly mixed powdery high-efficiency denitration agent 2.

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Abstract

The invention relates to the field of industrial flue gas treatment, in particular to an efficient denitration agent for waste incineration flue gas and a preparation method of the efficient denitration agent. The denitration agent comprises, by mass, 85-97% of a main denitration agent, 1-5% of a catalyst, 1-5% of a temperature auxiliary agent and 1-5% of other auxiliary agents, the main denitration agent is an amino-containing substance, and the temperature auxiliary agent is an alkali metal compound; according to the present invention, the alkali metal compound can broaden the temperature interval of the reaction of the main denitration agent and the NOx gas in the flue gas, such that the main denitration agent can completely and rapidly react with the NOx gas in the flue gas, the optimal reaction temperature of the main denitration agent and the NOx gas in the flue gas is reduced so as to improve the denitration rate to 80-95%, and the NOx emission limit of the reacted gas is less than 100 mg / Nm < 3 >.

Description

technical field [0001] The application relates to the field of industrial flue gas treatment, and in particular, to a high-efficiency denitrification agent for waste incineration flue gas and a preparation method thereof. Background technique [0002] As the output of municipal solid waste increases year by year, the incineration and power generation of solid waste needs to achieve waste reduction, harmlessness and resource utilization. Domestic waste incineration flue gas denitrification refers to the removal of NO in the flue gas generated by waste incineration. x Gas removal to make NO in the exhaust flue gas x Gas content meets national or local standards. [0003] The mainstream denitrification process in domestic waste incineration power plants is "SNCR" or "SNCR+SCR" process. At present, most provinces and cities in the domestic waste incineration industry implement the existing "Standards for the Control of Pollutants in Domestic Waste Incineration" (GB 18485-2014...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/56
CPCB01D53/8625B01D2258/0283
Inventor 刘向阳刘大伟张志远梁勇周宇马刚平宋俊成吴双陈领一
Owner SHOUGANG ENVIRONMENTAL IND
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