Fixed bed straw gasification process with tar backflash

A fixed bed and tar technology, applied in the field of straw gasification technology, can solve the problems of secondary pollution of tar, and achieve the effects of improving calorific value, avoiding inconvenience and improving gasification efficiency.

Active Publication Date: 2013-01-09
XUZHOU KERONG ENVIRONMENTAL RESOURCES CO LTD
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Problems solved by technology

[0003] In order to overcome the problems existing in straw gasification, the present invention provides a fixed-bed straw gasification process with tar backburning, which can realize automatic tar backburning, avoid the inconvenience caused by cleaning tar, and improve gasification efficiency , which increases the calorific value of gas, reduces the cost of straw gasification, and also solves the problem of secondary pollution of tar to the environment

Method used

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  • Fixed bed straw gasification process with tar backflash
  • Fixed bed straw gasification process with tar backflash

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Embodiment Construction

[0010] In the figure, in this process, there is a cylindrical gasifier 1, and this gasifier 1 is divided into a downdraft fixed-bed gasifier ( figure 1 -l) and the up-suction fixed-bed gasifier (Fig. 2-1) where the gasification wind enters from the top; The upper and lower parts of the side wall are sequentially connected with the first air guide pipe 4, the filter dust collector 3, the second air guide pipe 5, the tar trap 6, the coke collecting tank 9, the first back-burning pipe 10, the liquid-sealed elbow 11, the second Two back to the combustion pipe 12 and the pilot burner 13, so that the collected tar is injected into the gasification furnace 1 to continue burning; wherein, the gasification furnace 1 is discharged to keep the reaction temperature at 500 ° C ~ 1500 ° C, in the filter dust collector 3 Inside, the high-temperature gas generated by the gasifier is firstly dedusted, and in the tar trap 6, the tar in the gas is collected by combining inertia and cooling. Und...

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Abstract

The invention provides a fixed bed stalk gasification process with tar backflash. The process comprises the following steps of: under the condition of thermal insulation, removing dust in high-temperature combustible gas generated by a gasification furnace; collecting tar in the combustible gas by a method combining inertia and cooling; and automatically refluxing the collected tar to a high-temperature oxygen enriched combustion zone of the gasification furnace for combustion and cracking under actions of gas injection and self gravity. The process has the advantages of greatly lowering the content of the tar in the combustible gas, realizing the automatic backflash of the tar, improving the overall gasification efficiency, calorific value of the combustible gas and the quality of the combustible gas, and solving the secondary pollution problem of the tar.

Description

technical field [0001] The invention relates to a straw gasification process which uses an inertial cooling method to remove tar and uses a gas ejection method to promote tar back-burning, and a fixed-bed straw gasification process with tar back-burning. Background technique [0002] As far as straw gasification is concerned, regardless of the fixed bed or fluidized bed gasification process, tar is inevitably contained in the gas due to the limitation of gasification temperature and reaction conditions during the reaction process. When the temperature of the gas decreases, the tar in the gas condenses on the cold wall and adheres to the dust in the gas to form oil scale. The continuous accumulation of oil scale on subsequent devices or pipelines will cause blockage of devices and pipelines, making the gasifier unable to work normally, and it is also extremely difficult to clean these oil scales. Most of the existing straw gasification devices adopt the traditional water was...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/02C10J3/84
CPCY02E20/18
Inventor 林冲陈勇孙昌栋
Owner XUZHOU KERONG ENVIRONMENTAL RESOURCES CO LTD
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