Method and device for zero emission of CO2 from burning coal

A zero-emission, CO2 technology, applied in the production of hydrogen, etc., can solve problems such as environmental hazards, cost and energy consumption, system complexity, etc., and achieve the effect of improving utilization and promoting full gasification

Inactive Publication Date: 2010-06-23
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

There are mainly two approaches: one is based on the integrated gasification combined cycle (IGCC) CO 2 Separation system, but the complexity of the device and its system and the high initial investment greatly limit the popularization and application of this technology; the second is based on limestone and other CO 2 Dry Absorbent Based CO 2 Zero-emission system, although the United States Zero Emissions Coal Utilization Alliance (ZECA), Japan's New Energy C

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  • Method and device for zero emission of CO2 from burning coal
  • Method and device for zero emission of CO2 from burning coal

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Embodiment Construction

[0023] Coal CO proposed by the present invention 2 Zero emission devices such as figure 1 shown. One of the remarkable features of this device is the adoption of two-stage spouted fluidized bed, and the upper end of the lower fluidized bed and the lower end of the upper fluidized bed are respectively made into contraction port and expansion port type structures, not only It is beneficial to the organization of the flow field of the reaction flow in the fluidized bed, and it is also conducive to the strong back-mixing and prolongation of the residence time of the pulverized coal particles, the reaction gas flow and the oxygen carrier particles in the reactor.

[0024] Coal CO proposed by the present invention 2 Zero Emission Technology to MFe 2 o 4 (M stands for Cu, Mn, Co and Ni) is the oxygen carrier, which is transported into the upper section of the two-stage spouted fluidized bed 3 by the cyclone separator 2, and the oxygen carrier MFe is completed in the B area and at...

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Abstract

The invention provides a method for zero emission of CO2 from burning coal. The method comprises the following steps: MFe2O4 (M stands for any of Cu, Ni, Mn and Co) oxygen carrier is decomposed to generate oxygen deficient ferrite MFe2O4-delta (delta is more than or equal to 0 and is less than or equal to 2) and O2, the oxygen deficient ferrite and coal gasified products carry out reduction reaction to generate CO2, H2O and noncondensable gas, wherein the noncondensable gas and the O2 which is obtained by decomposition carry out oxidation reaction to generate CO2 and steam; and the generated CO2 and steam and the reduced oxygen deficient ferrite carry out reduction reaction to generate synthetic gas consisting of CO and hydrogen, thus realizing zero emission of CO2. The invention also provides a device for realizing the method, and main components of the device are a rapid fluidized bed, a two-section spouted-fluidized bed and a bubbling fluidized bed. The method and the device realize efficient and clean use of the burning coal and true zero emission of CO2, avoid energy and cost consumption of long-distance transmission of CO2 and have wide application prospect.

Description

technical field [0001] The invention relates to the field of coal combustion, in particular to CO in the process of coal combustion 2 Zero emission method and apparatus. Background technique [0002] While coal-based fossil fuels provide more than 85% of the world's energy consumption, the CO produced by the coal combustion process 2 CO produced by human activities 2 a major source of . Coal-fired CO Control 2 emission levels, developing efficient coal-fired CO 2 Emission reduction technology has great social significance and economic value. Compared with improving the efficiency of coal-fired power generation, promoting energy substitution and adopting low-carbon fuels (such as natural gas and biomass, etc.), the two CO 2 Emission reduction technology route, the CO produced by coal combustion 2 The route of capture and post-storage treatment (referred to as the CCS route) is more active and effective, and can effectively realize coal-fired CO2 without changing the cu...

Claims

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Application Information

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IPC IPC(8): C01B3/02
Inventor 王保文郑瑛赵海波张少华郑楚光
Owner HUAZHONG UNIV OF SCI & TECH
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