Method and device for cascade utilization of oxygen-enriched combustion heat

A technology of oxygen-enriched combustion and heat, which is applied in the direction of combustion methods, combustion equipment, and solid fuel combustion, and can solve problems such as large optimization space and complex oxygen-enriched combustion system

Active Publication Date: 2015-09-09
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The oxygen-enriched combustion system is relatively complex, and there is a large room for optimization

Method used

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  • Method and device for cascade utilization of oxygen-enriched combustion heat

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the drawings and embodiments.

[0023] The invention relates to a cascade utilization method of oxygen-enriched combustion heat, which can significantly improve the heat utilization rate of the system. Another core of the present invention is to provide a device for implementing the above method. Structure like figure 1 Shown.

[0024] The method for stepwise utilization of oxygen-enriched combustion heat provided by the present invention:

[0025] The flue gas discharged from the boiler is split to form a first part of flue gas, a second part of flue gas and a third part of flue gas.

[0026] The first part of the flue gas is used as the circulating flue gas and sent to the furnace again, the second part of the flue gas is used to preheat the oxygen sent to the boiler, and the third part of the flue gas is to heat the boiler feed water.

[0027] The actual temperature of the oxygen fed into the furnace ...

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Abstract

The invention discloses a method for gradient utilization of oxygen-enriched combustion heat. The method comprises the following steps of: (A) dividing the outlet smoke of a boiler (1) into a first part of smoke, a second part of smoke and a third part of smoke, feeding the first part of smoke into a hearth of the boiler (1) as circulating smoke, preheating the oxygen fed into the boiler (1) by the second part of smoke, and heating the high-pressure and low-pressure feed water of the boiler (1) by the third part of smoke; (B) feeding the second part of smoke and the third part of smoke into a smoke condenser (17) after heat exchange, condensing to normal temperature and feeding into a smoke compressor (10); and (C) compressing air by an air compressor (7), cooling by a compressed air low-pressure feed water heater (8) and feeding into an oxygen generation system (9), and feeding the oxygen generated by the oxygen generation system (9) into an oxygen preheater (2). According to the invention, the power generation efficiency of an oxygen-enriched combustion power station is improved, and the CO2 trapping cost of the coal-fired power plant is reduced.

Description

Technical field [0001] The invention relates to a cascade utilization method of oxygen-enriched combustion heat, which belongs to the cross field of energy technology and environmental protection technology. In addition, the present invention also relates to a device for implementing the above method. Background technique [0002] The large amount of greenhouse gas CO emitted from the burning of fossil fuels 2 The harm to the environment has aroused global attention. In numerous CO 2 Among the separation and capture technologies, oxy-fuel combustion technology is a new type of low-cost separation and recovery of CO 2 In addition, the new concept of combustion mode with lower pollutant emissions has attracted the attention of researchers from various countries. [0003] Due to the addition of the air separation subsystem and the flue gas purification and compression subsystem, the power generation efficiency of the unit is reduced by 8% to 12% compared with the conventional unit, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23B80/02F23C9/06F22D1/00F23L7/00
CPCY02E20/34
Inventor 段伦博韩冬段钰锋向文国
Owner SOUTHEAST UNIV
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