Coal-fired fluidized bed micro oxygen rich combustion CO2 emission reduction method and system

A technology of oxygen-enriched combustion and fluidized bed, which is applied in the field of boiler combustion, can solve the problems that power plants are difficult to bear economical decline, achieve the effects of reduced power, reduced recirculated flue gas volume, and improved economical efficiency

Inactive Publication Date: 2012-04-25
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

Since the current plant efficiency of the power plant is only about 40%, it is difficult for each power plant to bear the 8-10% economic decline caused by the oxygen-enriched combustion method

Method used

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  • Coal-fired fluidized bed micro oxygen rich combustion CO2 emission reduction method and system
  • Coal-fired fluidized bed micro oxygen rich combustion CO2 emission reduction method and system
  • Coal-fired fluidized bed micro oxygen rich combustion CO2 emission reduction method and system

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Embodiment Construction

[0027] The method of the present invention combines micro-oxygen-enriched combustion in a coal-fired fluidized bed with physical adsorption to jointly form an industrialized coal-fired boiler CO 2 emission reduction technology. The micro-oxygen-enriched combustion of the coal-fired fluidized bed uses a mixture of air, oxygen and recirculated flue gas as a combustion aid. The oxygen content in the mixed gas is about 25%, and the recirculated flue gas content is 30%-40% %, the balance is air. In the micro-oxygen-enriched combustion mode, the CO in the flue gas is generated 2 The gas concentration is 30% to 40%, the CO in the flue gas 2 Physical adsorption technology is used for removal.

[0028] The coal-fired fluidized bed micro-oxygen-enriched combustion system of the present invention includes an air separation oxygen generator, an air supply device, a circulating fluidized bed device, a dust removal device and a CO 2 Recovery device, the above-mentioned device is describ...

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Abstract

The invention discloses a coal-fired fluidized bed micro oxygen rich combustion CO2 emission reduction method and a coal-fired fluidized bed micro oxygen rich combustion CO2 emission reduction system for solving the problem of low-cost CO2 emission reduction of an industrialized coal-fired boiler. A micro oxygen rich combustion mode using mixed gas of air, oxygen and recycled smoke as a combustion aid is adopted, wherein the mixed gas contains about 25 percent of oxygen, 30 to 40 percent of recycled smoke and the balance of air; and in the micro oxygen rich combustion mode, the concentration of the CO2 gas in the generated smoke is 30 to 40 percent, and the CO2 in the smoke is removed by adopting a physical adsorption technology. The invention also provides a system device for implementing the method. By considering oxygen making cost, energy consumption and optimal comprehensive effect of separating CO2 by physical adsorption and combining the micro oxygen rich concept and the circulating fluidized bed combustion technology, desulfuration, denitration, decarburization and zero pollution emission at lower cost can be realized. The invention has the advantages of good economic efficiency, simple process, low energy consumption, high automation degree in operation process and the like.

Description

technical field [0001] The invention relates to a coal-fired power generation technology, in particular to a coal-fired fluidized bed micro-oxygen-enriched combustion CO 2 The emission reduction method and system belong to the technical field of boiler combustion. Background technique [0002] In recent years, the global warming effect has become increasingly serious, which has affected the economic life of many countries and even threatened the survival of some countries with lower sea levels. The main cause of the greenhouse effect is CO 2 , where the CO produced by coal combustion 2 About half of the world's annual CO emissions 2 more than 50% of the total. Therefore, for the CO produced by burning coal 2 Emission reduction plays a pivotal role in mitigating the greenhouse effect. At present, industrialized coal-fired boilers adopt the air-supporting combustion method, that is, air is used as the combustion-supporting medium of coal. The CO in the flue gas produced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/20F23L7/00F23C10/00F23C10/18F25J3/00B01D53/04
CPCY02C10/08Y02C20/40Y02E20/34
Inventor 王春波邢晓娜付东雷鸣
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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