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Dense-phase conveying-bed coal pressurizing gasifying apparatus and method

A technology of pressurized gasification and transport bed, applied in the field of coal gasification, can solve the problems of low investment and achieve the effects of improving removal efficiency, preventing coking and improving quality

Active Publication Date: 2007-08-29
SOUTHEAST UNIV
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Problems solved by technology

[0006] Technical problem: Aiming at the problems existing in various industrial gasifiers and dense-phase transport bed coal pressurized gasification technology, the present invention proposes a dense-phase transport bed coal pressurized gasification device and method, the purpose of which is to provide It has wide adaptability to coal types, especially suitable for processing high-sulfur, high-ash, and high-ash melting point coal with abundant reserves in my country, and has high carbon conversion rate, high calorific value of gas, low investment and excellent environmental protection performance in the gasification process. Gasification method and device

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Embodiment Construction

[0021] See attached drawing 1. Gasification reactor 1 is divided into three sections: mixing section 9, lifting section 10 and conveying section 11. The same high operating pressure of 2.0-3.0 MPa, medium-high temperature operating temperature of 1000-1100°C and solid flux are adopted. More than 200kg / m 2 s dense-phase transport flow regime, but operating at different speeds. The mixing section 9 adopts a low flow rate operation mode of 2.5-4.5m / s, and its function is to achieve good mixing of coal and limestone A, gasification agent T and primary and secondary return materials, as well as coal devolatilization, combustion and Partial gasification reaction; in order to realize this function, a certain amount of inert bed material with appropriate particle size, such as quartz sand, is added in the mixing section 9 to ensure that a dense phase area is formed at the bottom of the mixing section 9; Fine coal particles; the gasification agent T is formed by mixing superheated ste...

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Abstract

The invention relates to a dense phase conveying bed coal preesurized gasification device and a gasification method. The gasification reactor includes pressure case, mixing section, lifting section, and conveying section. The mixing section adopts low flow speed, and has inlet for coal limestone, assistant gasification agent, and has grid plate, scum pipe, air chamber and main gasification agent inlet. The lifting section has assistant air or oxygen inlet and adopts high flow velocity mode. The convey section adopts middle velocity mode, and the outlet of convey section has two high efficiency cyclone separator. The material return mouth of material return section is inserting into gasification reactor.

Description

technical field [0001] The invention relates to a pressurized gasification device and method for dense-phase transport bed coal, belonging to the technical field of coal gasification. Background technique [0002] Coal gasification is the basis of many new-generation clean coal technologies, such as polygeneration energy systems led by coal gasification, integrated gasification combined cycle (IGCC), and hydrogen production and CO2 collection and storage based on coal gasification. 2 Phase coupling technology, etc. Coal gasification can not only solve the pollution problem in the direct combustion process to a great extent, but also form high-value products, which plays a very important role in my country's energy strategy. [0003] At present, industrialized gasification devices mainly include fixed bed, fluidized bed and entrained bed gasifiers, and these gasification processes all have certain problems. The fixed-bed gasifier has poor adaptability to coal types, and is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/56
CPCY02E20/18
Inventor 金保升章名耀钟文琪熊源泉肖睿张勇王小芳
Owner SOUTHEAST UNIV
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