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Coal fired serial fluidized bed indirect burning device and method

A combustion method and fluidized bed technology, applied in the direction of fluidized bed combustion equipment, combustion method, fuel burned in a molten state, etc., can solve the problems of increased power generation cost, low separation efficiency, difficult implementation, etc., and achieve fast air velocity, The effect of high reaction temperature and strong adaptability to coal types

Inactive Publication Date: 2004-05-05
SOUTHEAST UNIV
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Problems solved by technology

[0003] ●The separation of CO by molecular membrane 2 For separation and purification treatment, the separation efficiency is low and the cost is high. For example, a thermal power plant adopts this method to treat CO in flue gas 2 Separate processing will increase the cost of power generation by 20%, which is difficult to implement even in developed countries
[0004] ●Removal of CO by biological photosynthesis 2 , looking for high-efficiency biological algae for large-scale CO removal 2 , technical breakthrough is still needed

Method used

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  • Coal fired serial fluidized bed indirect burning device and method
  • Coal fired serial fluidized bed indirect burning device and method

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Embodiment Construction

[0021] The coal-fired serial fluidized bed indirect combustion device of the present invention is composed of a coal-water slurry gasification reactor 1, a circulating fluidized bed air reactor 2, a moving fluidized bed gas separator 3, and a bubbling fluidized bed fuel reaction device 4, gas dust collector 5, and cyclone separator 6. The circulating fluidized bed air reactor 2 is equipped with a coal water slurry gasification reactor 1, and its lower part is connected with the moving fluidized bed gas separator 3, and the moving fluidized bed gas separator 3 is connected with the bubbling fluidized bed fuel The reactors 4 are connected, and the upper part of the bubbling fluidized bed fuel reactor 4 is connected with the gas dust collector 5. The upper part of the gas dust collector 5 is a carbon dioxide and water vapor outlet C, and the upper part of the circulating fluidized bed air reactor 2 is It communicates with the cyclone separator 6, the lower part of the cyclone sep...

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Abstract

An indirect combustion apparatus with serially connected fluidized beds for burning coal is composed of circulating fluidized-bed air reactor, bubbling fluidized-bed fuel reactor, moving fluidized-bed gas isolator, and cyclone separator, all of which are serially connected. Its combustion method includes mixing powdered coal with water, delivering the mixture to the water-coal slurry gasifying reactor, feeding the resultant gas in bubbling fluidized-bed fuel reactor and moving fluidized-bed gas isolator, oxidizing reaction between air and metal in said circulating fluidized-bed air reactor and separating by cyclone separator to obtain metallic oxide, reaction between said metallic oxide and said resultant gas in the bubbling fluidized-bed fuel reactor to reduce it into metal, returning back to said air reactor for regenerating metallic oxide, and reacting with water-coal slurry in fuel reactor to generate Co2 and H2O.

Description

technical field [0001] The present invention is a combustion method of coal, specifically to realize the indirect combustion of coal and achieve CO 2 Apparatus and method for zero emissions. Background technique [0002] carbon dioxide (CO 2 ) is the most influential greenhouse gas among many potential greenhouse gases, how to reduce CO emissions 2 It has become one of the main contents of the sustainable development of mankind in the future. Conventional combustion technologies use air as the oxidant, and the CO in the generated flue gas 2 10-20%, CO 2 The follow-up treatment (concentration and purification) cost is too high, and the following methods are usually arranged: [0003] ●The separation of CO by molecular membrane 2 For separation and purification treatment, the separation efficiency is low and the cost is high. For example, a thermal power plant adopts this method to treat CO in flue gas 2 Separate treatment will increase the cos...

Claims

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Application Information

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IPC IPC(8): F23C10/02
Inventor 沈来宏肖军
Owner SOUTHEAST UNIV
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