Ultra-low emission integrated system of supercritical carbon dioxide coal-fired boiler

A carbon dioxide, coal-fired boiler technology, applied in indirect carbon dioxide emission reduction, incinerators, combustion methods, etc., can solve the problems of high temperature air preheater blockage and wear, reduce pipeline blockage, reduce maintenance work, and extend service life Effect

Pending Publication Date: 2020-12-11
ANHUI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0009] Aiming at the problem of ultra-low emission of flue gas pollutants in existing supercritical carbon dioxide boilers, the present invention provides an integrated system for ultra-low emission of supercritical carbon dioxide coal-fired boilers, which solves the problem of blockage and wear of high-temperature air preheaters

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  • Ultra-low emission integrated system of supercritical carbon dioxide coal-fired boiler
  • Ultra-low emission integrated system of supercritical carbon dioxide coal-fired boiler

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Embodiment 1

[0038] Such as figure 1 and figure 2 As shown, the arrows in the figure indicate the direction of travel of hot gas and materials. The supercritical carbon dioxide coal-fired boiler ultra-low emission integrated system of this embodiment includes a boiler unit 100 , a waste heat recovery unit 200 , a dust removal and denitrification unit 300 , a desulfurization unit 400 and an air circulation unit 500 .

[0039] In this embodiment, the boiler unit 100 includes an ammonia injection burner 110, and the ammonia injection burner 110 may be the burner in the application number 202010289079.X.

[0040] In this embodiment, the dust removal and denitration unit 300 includes a high temperature dust collector 310 , a high temperature air preheater 311 , an SCR denitration reactor 312 , a low temperature air preheater 313 and a blower 314 connected in sequence.

[0041] In this embodiment, the waste heat recovery unit 200 includes a heat exchange tube 210 and a bottom circulation syst...

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Abstract

The invention discloses an ultra-low emission integrated system of a supercritical carbon dioxide coal-fired boiler, and belongs to the technical field of ultra-low emission. The system comprises a boiler unit and a dust removal and denitration unit, wherein the boiler unit comprises an ammonia spraying combustor; the dust removal and denitration unit comprises a high-temperature dust remover, a high-temperature air preheater, an SCR denitration reactor, a low-temperature air preheater and an air blower which are sequentially connected; the high-temperature dust remover is arranged in front ofthe high-temperature air preheater; and an adjustable constant pressure valve is additionally arranged on the inner side of an inlet of the high-temperature dust remover and used for maintaining theflue gas pressure when the high-temperature dust remover normally works. The high-temperature dust remover is arranged in front of the high-temperature air preheater, the service life of the high-temperature air preheater can be greatly prolonged when flue gas subjected to dust removal passes through the high-temperature air preheater, and meanwhile the problem of pipeline blockage of the high-temperature air preheater is solved.

Description

technical field [0001] The invention belongs to the technical field of ultra-low emission, and more specifically relates to an ultra-low emission integrated system of a supercritical carbon dioxide coal-fired boiler. Background technique [0002] In the coal-fired power generation boiler system where water is used as the circulating working medium, the heat transfer characteristics of water vapor cannot meet the current needs. Therefore, it is necessary to continuously improve the parameters such as high temperature and high pressure of water vapor to improve the cycle efficiency, and at the same time bring higher performance to the steel. requirements. 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 superc...

Claims

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Application Information

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IPC IPC(8): F23J15/06F23J15/02F23J15/08F23L15/00F23G7/06
CPCF23J15/06F23J15/02F23J15/08F23L15/00F23G7/065Y02E20/34
Inventor 林郁郁张丰顾明言杨莉徐中文黄庠永陈萍伍佳佳袁金燕朱雨涵
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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