Experimental process used for ultralow emission of pulverized coal combustion

A pulverized coal combustion, ultra-low technology, applied in the combustion of lump fuel and powder fuel, the combustion of liquid fuel and powder fuel, the combustion of gaseous fuel and powder fuel, etc., can solve the problem of different and complex products. and other problems to achieve the effect of ensuring sufficient burnout, reducing pollutant content and reducing NOX

Pending Publication Date: 2021-06-29
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In order to protect the environment and promote sustainable development, the emissions of enterprises in the production process must meet certain standards. Coal powder is used as a combustion raw material, and its combustion can generate a large amount of heat, and it also produces NO X , SO 2 , dust and other pollutants, so it is urgent to control the pollutants formed by its combustion. In order to reduce the content of pollutants produced by pulverized coal combustion, ammonia selective catalytic reduction (SCR) and bag dust removal are used in the prior art However, in order to further reduce the content of pollutants in the flue gas, it is necessary to conduct research on pulverized coal combustion experiments, but the related flue gas is often prepared in the prior art, and the flue gas It is not the product of pulverized coal combustion. Since the product of pulverized coal combustion is more complex, it may not be the same as the research results in the experiment. Therefore, further improvement is needed.

Method used

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  • Experimental process used for ultralow emission of pulverized coal combustion
  • Experimental process used for ultralow emission of pulverized coal combustion
  • Experimental process used for ultralow emission of pulverized coal combustion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] combine figure 1 and figure 2 , an ultra-low emission experimental process for pulverized coal combustion in this embodiment, the device includes a combustion unit, a dust removal and denitrification unit, a desulfurization unit, and a flue gas circulation unit, wherein the combustion unit includes a furnace body 110, a powder feeder 130 and a swirl burner 160, the swirl burner 160 is arranged inside the upper end of the furnace body 110, the powder feeder 130 is connected with the swirl burner 160 through a pipeline, and the powder feeder 130 is equipped with coal Powder and coal powder are transported to the swirl burner 160 along the pipeline, thereby entering the furnace body 110 for subsequent combustion. In addition, a liquefaction tank 120 is provided on one side of the furnace body 110, and the liquefaction tank 120 is equipped with liquefied petroleum The liquefaction tank 120 communicates with the swirl burner 160 through a pipeline to provide fuel for the c...

Embodiment 2

[0067] A kind of ultra-low emission experimental process for pulverized coal combustion in this embodiment is basically the same as in Embodiment 1, further,

[0068] In this embodiment, additives are sprayed into the pulverized coal combustion zone in the furnace body 110, and the additives include one or more of anti-slagging and anti-coking additives, deNOx agents, sulfur-fixing agents or coal-burning catalysts; wherein, anti-slagging The slag anti-coking additive is titanium isopropoxide or silicon-aluminum additive, and the silicon-aluminum additive can be kaolin, vermiculite, SiO 2 Or one or more of fly ash. When titanium isopropoxide is added, its addition ratio accounts for 3% to 5% of the amount of coal fed into the furnace; when silicon aluminum type additives are added, the general control quality accounts for 2% to 10% of the total mass of coal powder. Si-aluminum additives or titanium isopropoxide can improve the ash melting point, avoid or alleviate coking; the ...

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Abstract

The invention discloses an experimental process used for ultralow emission of pulverized coal combustion, and belongs to the technical field of pulverized coal combustion emission. In the experimental process, a combustion unit adopts pulverized coal as a combustion raw material, air required by combustion is introduced into a furnace body through a primary air pipe, a secondary air pipe and an over-fire air pipe, meanwhile, part of flue gas generated by combustion of the combustion unit is conveyed into the furnace body through a flue gas circulation unit, and therefore the combustion environment of the pulverized coal is improved, self-stabilization combustion of the pulverized coal is achieved, and it is guaranteed that the pulverized coal can be fully burnt out; and flue gas generated by the combustion unit is subjected to dust removal and denitration through a dust removal and denitration unit and then enters a desulfurization unit to be desulfurized, and the content of pollutants in the flue gas is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of pulverized coal combustion emission experiments, and more specifically relates to an experimental process for ultra-low emission of pulverized coal combustion. Background technique [0002] In order to protect the environment and promote sustainable development, the emissions of enterprises in the production process must meet certain standards. Coal powder is used as a combustion raw material, and its combustion can generate a large amount of heat, and it also produces NO X , SO 2 , dust and other pollutants, so it is urgent to control the pollutants formed by its combustion. In order to reduce the content of pollutants produced by pulverized coal combustion, ammonia selective catalytic reduction (SCR) and bag dust removal are used in the prior art However, in order to further reduce the content of pollutants in the flue gas, it is necessary to conduct research on pulverized coal combustion experiments, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C5/08F23C7/00F23C9/06F23D17/00F23L15/00F23J15/00F23J15/02G01N31/12
CPCF23C5/08F23C7/004F23C9/06F23D17/00F23L15/00F23J15/003F23J15/006F23J15/025G01N31/12F23J2215/10F23J2215/101F23J2215/20Y02E20/34
Inventor 黄庠永顾明言林郁郁陈萍王东方李计划阮晨杰张丰宁克祥陈传威
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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