Experimental system for ultra-low emission research of supercritical CO2 coal-fired boiler

A technology for coal-fired boilers and experimental systems, which is applied in the directions of emission prevention, combustion using multiple fuels, combustion using lump fuels and liquid fuels, etc. Low efficiency and other problems, to achieve the effect of reducing NOX and pollutant content

Pending Publication Date: 2021-07-23
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] After searching, for example, the invention patent "A Multifunctional Experimental System for Removing Multiple Pollutants" (CN201710288935.8) can simultaneously measure the dust removal efficiency of the electric bag filter, nitrogen oxides, sulfur oxides, and mercury and their compounds. Removal efficiency, however, the flue gas used in this test bench is not direct combustion flue gas, at the same time, the temperature and desulfurization efficiency of the electric bag filter are low, and the denitrification uses an ads

Method used

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  • Experimental system for ultra-low emission research of supercritical CO2 coal-fired boiler
  • Experimental system for ultra-low emission research of supercritical CO2 coal-fired boiler
  • Experimental system for ultra-low emission research of supercritical CO2 coal-fired boiler

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Embodiment 1

[0044] combine figure 1 with figure 2 , a supercritical CO of this embodiment 2 The experimental system for ultra-low emission research of coal-fired boilers includes a combustion unit, a dust removal and denitrification unit, a desulfurization unit, and a flue gas circulation unit. 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 pulverized coal, and the pulverized coal is transported along the pipeline To the swirl burner 160, so as to enter the inside of the furnace body 110 to facilitate subsequent combustion. In addition, a liquefaction tank 120 is provided on one side of the furnace body 110, and liquefied petroleum gas is housed in the liquefaction tank 120. The liquefaction tank 120 passes through the pipeline It communicat...

Embodiment 2

[0063] A kind of supercritical CO of the present embodiment 2 The experimental system for research on ultra-low emissions of coal-fired boilers is basically the same as in Example 1. Furthermore, in this example, additives are injected into the pulverized coal combustion area in the furnace body 110. The additives include anti-slagging and anti-coking additives, deNOx One or more of the agent, sulfur-fixing agent or coal-burning catalyst; wherein, the anti-slagging and anti-coking additive is titanium isopropoxide or silicon-aluminum type additive, and the silicon-alumina type 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 poin...

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Abstract

The invention discloses an experimental system for ultra-low emission research of a supercritical CO2 coal-fired boiler, and belongs to the technical field of boiler combustion. The experimental system involves a combustion unit, a dust removal and denitration unit, a desulfurization unit and a flue gas circulation unit, wherein the 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, and meanwhile, part of flue gas generated by combustion of the combustion unit is conveyed into the furnace body through the flue gas circulation unit, so that 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 the flue gas generated by the combustion unit is subjected to dust removal and denitration through the dust removal and denitration unit and then enters the desulfurization unit to be desulfurized, so that the content of pollutants in the flue gas is effectively reduced.

Description

technical field [0001] The present invention relates to supercritical CO 2 Coal-fired boiler (pulverized coal fuel) combustion and pollutant emission and control technology field, more specifically, relate to a kind of supercritical CO 2 Experimental system for ultra-low emission research of coal-fired boilers. Background technique [0002] Due to the special physical properties of supercritical carbon dioxide, it has the advantages of smaller power generation system and floor space compared with water vapor, and because its energy density is higher than that of water, according to the existing high temperature resistance level of steel, the efficiency of supercritical carbon dioxide boiler system higher. Compared with steam boilers, supercritical carbon dioxide boilers have the advantages of compact power generation system, small footprint, water saving, and low corrosion to steel. Therefore, they have received extensive attention from domestic research institutions and h...

Claims

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Application Information

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IPC IPC(8): F23C5/08F23C7/00F23C9/06F23D17/00F23L15/00F23J15/00F23J15/02G01N31/12
CPCF23C5/08F23C7/004F23C9/06F23D17/00F23L15/00F23J15/003F23J15/006F23J15/025G01N31/12F23J2215/10F23J2215/101F23J2215/20Y02E20/32Y02E20/34
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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