Low-grade fuel gasification system and operation method thereof
A low-grade fuel and gasification system technology, applied in the field of low-grade fuel gasification system and its operation, can solve problems such as difficulty in utilization
Pending Publication Date: 2018-09-07
TAIYUAN BOILER GROUP +1
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- Application Information
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Problems solved by technology
The combustible gas produced by pyrolysis and gasification contains a certain concentration of tar, which makes some difficulties in subsequent utilization
Method used
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[0026] The specific structure, operation method and implementation method of the present invention will be discussed in detail below in conjunction with the accompanying drawings and embodiments.
[0027] 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.
[0028] The low-grade fuel gasification system described in the present invention is used for pyrolysis, gasification and combustion of low-grade energy sources such as biomass and / or low-rank coal.
[0029] Such as figure 2 and image 3 As shown, a low-grade fuel gasification system includes a combustion bed 1, a combustion separator 3, a waste heat boiler 5, a flue gas dust collector 8, a pyrolysis gasification feeder 30, and a pyr...
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Abstract
The invention discloses a low-grade fuel gasification system and an operation method thereof. The low-grade fuel gasification system comprises a combustion bed, a pyrolysis and gasification bed, a tarcracking bed and the like, wherein the combustion bed is connected with a combustion separator; a combustion circulating dipleg is arranged below the combustion separator; a flow divider valve is arranged on the combustion circulating dipleg, and is connected to the combustion bed and the tar cracking bed; a heat exchange bed is also arranged below the flow divider valve 38, and is connected to apipeline between the flow divider valve and the combustion bed; the pyrolysis and gasification bed is provided with an overflow port and is connected with the combustion bed by a pyrolysis and gasification bed discharging valve; the pyrolysis and gasification bed is connected with the tar cracking bed; a pyrolysis gas product of the pyrolysis and gasification bed enters the tar cracking bed so asto crack tar in the pyrolysis gas product; a gas duster is connected to the tar cracking bed; the lower part of the gas duster is connected with the pyrolysis and gasification bed through a crackingbed discharging valve. According to the low-grade fuel gasification system and the operation method thereof disclosed by the invention, the fast fluidization combustion bed, the bubbling fluidizationpyrolysis and gasification bed and the initial fluidization tar cracking bed are coupled; the fast bed combusts for providing heat for pyrolysis and gasification as well as tar cracking, so that gas generated by the system is clean without tar.
Description
technical field [0001] The invention relates to a low-grade fuel gasification system and its operating method, belonging to the field of gasification combustion equipment. Background technique [0002] Low-grade fuels refer to those fuels with low calorific value, high volatile matter or ash content, such as biomass, low-rank coal (lignite, peat, etc.), etc. Biomass and low-rank coal are solid fuels with high volatile content and low fixed carbon. The calorific value of combustible gas produced by pyrolysis and gasification is related to the conditions of pyrolysis and gasification. At present, the gasification of biomass and low-rank coal generally uses autothermal heating to reach the temperature required for pyrolysis and gasification, that is, a small part of combustion. As a result, the combustible content of the gas is reduced and the calorific value is reduced. At the same time, there is a relatively high proportion of carbon in the semi-coke formed by pyrolysis and...
Claims
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IPC IPC(8): C10J3/06C10J3/86C10J3/84
CPCC10J3/06C10J3/84C10J3/86C10J2300/093C10J2300/0916Y02P20/129
Inventor 吕俊复张建春杨海瑞张缦李永富刘青张一珍李昌龙
Owner TAIYUAN BOILER GROUP