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Method and device for utilizing oxygen-enriched combustion heat

A technology of oxy-fuel combustion and heat, applied in combustion methods, preheating, feed water heaters, etc., which can solve the problems of complex oxy-fuel combustion system and large optimization space.

Active Publication Date: 2013-08-07
SOUTHEAST UNIV
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  • Abstract
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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 utilizing oxygen-enriched combustion heat

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Embodiment Construction

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

[0023] The invention relates to a method for utilizing oxygen-enriched combustion heat, which can significantly improve the power generation efficiency of an oxygen-enriched combustion power station and reduce CO2 in a coal-fired power station. 2 The cost of capture. Another core of the present invention is to provide a device for implementing the above method. structured as figure 1 shown.

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

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

[0026] The first part of the flue gas is used to preheat the oxygen sent into the furnace 1, the second part of the flue gas is used to preheat the circulating flue gas sent into the furnace 1, and the h...

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Abstract

The invention discloses a method and a device for utilizing oxygen-enriched combustion heat. The method comprises step A, dividing outlet flue gas of a boiler (1) into a first part of flue gas, a second part of flue gas and a third part of flue gas, wherein the first part of flue gas preheats oxygen fed into the boiler (1), the second part of flue gas heats circulating flue gas fed into the boiler (1), and the third part of flue gas heats water; and step B, mixing and feeding the first part of flue gas, the second part of flue gas and the third part of flue gas into a flue gas condenser (18) after heat exchange, dividing the flue gas into two parts after the flue gas is dried and condensed to the normal temperature, feeding one part of flue gas into circulating flue gas preheater (3) as circulating flue gas, and feeding the other part of flue gas into a flue gas compressor (11). By means of the method and the device, the power generation efficiency of an oxygen-enriched combustion power station can be improved remarkably, and CO2 trapping costs of coal-fired power plants can be reduced.

Description

technical field [0001] The invention relates to a method for utilizing oxygen-enriched combustion heat, which belongs to the cross field of energy technology and environmental protection technology. In addition, the invention also relates to a device for carrying out the above-mentioned method. Background technique [0002] The greenhouse gas CO emitted by fossil fuel combustion 2 The harm to the environment has aroused great concern all over the world. In numerous CO 2 Among the separation and capture technologies, oxyfuel combustion technology is a new type of low-cost separation and recovery of CO 2 The new concept of combustion with low pollutant emissions has attracted the attention of researchers from all over the world. [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 8% to 12% lower than that of conventional units, which restricts the commercial app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J15/06F23L15/00F22D1/36
CPCY02E20/34
Inventor 段伦博韩冬段钰锋向文国
Owner SOUTHEAST UNIV
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