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Tar-free low-temperature gasification system and method

A low-temperature gasification and tar-free technology, applied in the field of gasification, can solve problems such as high tar and dust content, lower synthesis gas quality, and corrosion of heating surfaces, so as to achieve high gasification efficiency, improve gasification gas quality, and reduce dust volume effect

Pending Publication Date: 2022-01-28
BEIJING SIWEI TIANTUO TECH CO LTD
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AI Technical Summary

Problems solved by technology

Traditional fluidized bed and entrained bed gasifiers have high reaction rate and conversion efficiency, but there are problems with high tar and dust content, which not only reduces the quality of syngas, but also causes problems including blockage of pipelines, corrosion of heating surfaces or ash Equipment failure such as adhesion

Method used

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  • Tar-free low-temperature gasification system and method

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Embodiment Construction

[0032] The specific embodiment of the present invention and working process will be further described below in conjunction with accompanying drawing. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0033] The orientation terms such as up, down, left, right, front and rear in this application document are established based on the positional relationship shown in the drawings. If the drawings are different, the corresponding positional relationship may also change accordingly, so this should not be understood as limiting the scope of protection. In addition, the terms "first", "second", etc. are used for descriptive ...

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Abstract

The invention discloses a tar-free low-temperature gasification system and method. The tar-free low-temperature gasification system comprises a gasification device, a synthesis gas purification device, a gas holder and a hot flue gas generation device; and the gasification device comprises a gasification furnace and comprises a primary gasification area, a secondary gasification area and a gasification cooling area; a primary gasification agent distribution device is arranged at the bottom of the primary gasification area and used for spraying a first gasification agent, and hot flue gas which is generated by a hot flue gas generation device and has the temperature of 600-700 DEG C and the oxygen content of 8-15% is selected. The primary gasification area is further provided with a secondary gasification agent distribution device, and the secondary gasification area is provided with a tertiary gasification agent distribution device which is used for spraying a second gasification agent to form graded gasification. The second gasifying agent is high-temperature air and is obtained by heat exchange between air and high-temperature flue gas. The gasification process is precisely controlled by adopting temperature regulation and control T[actual]=[T[pre]-20 DEG C,T[pre]+20 DEG C] in the gasification furnace. The gasification system has the advantages that low-temperature gasification at the lower part can be realized, high-efficiency gasification is kept, and gasified gas is high in quality, free of tar and the like.

Description

technical field [0001] The invention relates to a tar-free low-temperature gasification system and method, in particular to a tar-free gasification system and a gasification method suitable for domestic garbage and hazardous waste, and belongs to the field of gasification. Background technique [0002] The composition of domestic waste is often complex and changeable, and there are large differences due to factors such as urban development level and residents' living habits. China's domestic waste includes kitchen waste, plastic, paper, glass, etc., and usually because of its high moisture content, it affects its combustion stability in the incinerator, causing problems such as insufficient combustion or deflagration, and the water evaporates to smoke The high moisture content of the flue gas in the gas will easily cause corrosion of the heating surface and subsequent equipment. Gasification can effectively avoid these problems, and can also obtain synthesis gas. However, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/56C10J3/72C10J3/76C10J3/84
CPCC10J3/56C10J3/721C10J3/723C10J3/76C10J3/84C10J2300/0946C10J2300/1215C10J2300/1223C10J2300/0953C10J2300/0956
Inventor 张凝张国义李冬梅
Owner BEIJING SIWEI TIANTUO TECH CO LTD
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