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Micro-oxygen-enriched combustion boiler system

An oxygen-enriched combustion and boiler technology, applied in the field of boiler systems, can solve problems such as not being used well, and achieve the effects of increasing theoretical combustion temperature, reducing investment and energy consumption, and optimizing combustion conditions

Inactive Publication Date: 2019-02-15
SHANGHAI BOILER WORKS
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

These advantages are not well utilized

Method used

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  • Micro-oxygen-enriched combustion boiler system

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Embodiment Construction

[0025] Below in conjunction with specific embodiment, further illustrate the present invention.

[0026] figure 1 The schematic diagram of the micro-oxygen-enriched combustion boiler system provided for this embodiment, the micro-oxygen-enriched combustion boiler system includes the boiler body, pulverizing equipment A1, flue gas treatment equipment A2, recirculation fan A3 and connecting pipes in the boiler system and valves etc.

[0027] The boiler body includes a furnace B1, a burner B2 and a heating surface including a gas preheater B3. After the flue gas discharged from the boiler body flows through the flue gas treatment equipment A2, part of it is exhausted from the boiler system as boiler exhaust S0, and the other part is used as recirculation primary air SR1; the recirculation primary air SR1 is pressurized by recirculation fan A3 and combined The primary air supplementary gas S1 is mixed, and then the mixed gas formed is divided into two paths: one path is heated b...

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Abstract

The invention provides a micro-oxygen-enriched combustion boiler system. After smoke discharged through a boiler body flows through smoke treatment equipment, a part of smoke serves as boiler exhaustsmoke to be discharged out of the boiler system, and the other part of smoke serves as recirculation primary air; the recirculation primary air is mixed with cold primary air supplementing gas after being pressurized through a recirculation draught fan, then, formed mixed gas is divided into two paths, one path of gas is heated through a gas preheater to serve as hot primary air, and the other path of gas serves as temperature regulating air; after being mixed, the hot primary air and the temperature regulating air enter powdering equipment; air powder mixture getting out of the powdering equipment serves as primary air of a combustor to enter a hearth; and after being heated through the gas preheater, cold secondary air becomes hot secondary air and serves as secondary air of the combustor to enter the hearth of the boiler body. According to the system, the reasonable concentration of oxygen entering a boiler is selected, the recirculation smoke is utilized for drying, solid fuel is conveyed into the hearth, smoke recirculation is not adopted in a secondary air system, and meanwhile the heat efficiency of the whole boiler system is obviously improved.

Description

technical field [0001] The invention relates to a boiler system, in particular to a micro-oxygen-enriched combustion boiler system. Background technique [0002] Currently, in coal-based electricity production, CO 2 Emissions of CO from all human activities 2 About 25% of total emissions are CO 2 Largest single point source of emissions. In the exhaust gas of conventional pulverized coal boiler air combustion, CO 2 The concentration is only 13% to 15%, which gives CO 2 The separation and capture of these materials bring great technical and economical problems. Oxygen-enriched combustion technology, also known as O 2 / CO 2 Combustion technology for organizing pulverized coal in O 2 and CO 2 Combustion in the mixed gas can greatly improve the CO in exhaust smoke 2 concentration (CO after dehydration 2 The concentration can reach more than 95%), which greatly simplifies the CO 2 recovery cost and difficulty. N 2 The content is very small, which is convenient for c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23B80/02F23L15/04
CPCF23B80/02F23L15/04Y02E20/34
Inventor 张翔闫凯韩彩凤徐雪元
Owner SHANGHAI BOILER WORKS
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