Pulverized coal combustion method and device with function of capturing CO2

A pulverized coal combustion and functional technology, applied in heating devices, using non-combustion exothermic chemical reactions to generate heat, heating fuel, etc., can solve incomplete reaction between coal and oxygen carrier, low reaction rate, separation difficulties, etc. problems, achieve far-reaching social significance and economic value, reduce the level of CO2 concentration, and prevent a sharp increase

Inactive Publication Date: 2010-03-10
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, when coal is used as fuel, because the gasification rate of coal is much lower than the reaction rate of oxygen carrier and coal gasification product, the reaction between coa

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  • Pulverized coal combustion method and device with function of capturing CO2

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Embodiment Construction

[0010] The present invention proposes to have CO 2 The new pulverized coal utilization device with capture function is composed of fast fluidized bed 1, first cyclone separator 2, bubbling fluidized bed 3, U-shaped flow sealing valve 4, second cyclone separator 5 and ash catcher 6. The upper part of the fast fluidized bed 1 communicates with the first cyclone separator 2, and the residual air of the reaction is discharged through the first separator 2, while the lower part of the first cyclone separator 2 communicates with the upper half of the bubbling fluidized bed 3 , the coal reaction tail gas is discharged through the second cyclone separator 5, the coal fly ash and fine oxygen carrier particles are collected through the ash catcher 6, and the lower half of the bubbling fluidized bed 3 is connected to the U-shaped flow sealing valve 4 connected, and then introduced into the fast fluidized bed 1 to complete the oxidation regeneration of the oxygen carrier and the subsequen...

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Abstract

The invention provides a pulverized coal combustion method with the function of capturing CO2, comprising the steps: CuFe2O4 is decomposed to generate O2 and oxygen vacancy ferrite CuFe2O4-delta (delta is no less than 0 but no more than 2); oxidation reaction is generated between the pulverized coal and the oxygen vacancy ferrite so as to generate CO2, H2O and non-condensed gas, wherein the oxidation reaction is generated between the non-condensed gas and O2 which is obtained by decomposition so as to generate CO2 and steam. The device for achieving the method comprises a loop which is formedby the communication of a fast fluidized bed, a first cyclone separator, a two-stage type bubbling fluidized bed, a U-type flow seal valve and the fast fluidized bed in sequence; and the bubbling fluidized bed is also communicated with a second cyclone separator which is communicated with an ash catching device. The pulverized coal combustion method with the function of capturing CO2 effectively combines a pure oxygen combustion technology of coal with a chemical chain combustion technology, not only lowers the preparation cost of the pure CO2, but also fully realizes the separation of the high-concentration CO2 after the coal reaction.

Description

technical field [0001] The invention relates to a pulverized coal combustion method and device. Background technique [0002] With the rapid increase in energy demand and the sharp increase in the use of fossil fuels, leading to the greenhouse gas CO 2 Accumulation in nature continues to increase, controlling CO in the process of fossil fuel combustion 2 emissions play an important role in addressing the greenhouse effect and global warming. Especially for China, given its energy structure dominated by coal, CO 2 In view of the fact that the level of emissions has increased sharply and has already ranked second in the world, the development of efficient coal-fired CO 2 Emission reduction technology to control my country's coal-fired CO 2 The emission level has great social significance and economic value. [0003] In the traditional pulverized coal combustion technology, due to the N in the air 2 For the dilution of coal combustion tail gas, the CO in the coal combusti...

Claims

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Application Information

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IPC IPC(8): F24J1/00F24V30/00
Inventor 王保文赵海波张少华郑楚光
Owner HUAZHONG UNIV OF SCI & TECH
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