Two-stage gasification method and gasification device for fuels with wide size distribution
A technology of a gasification device and a feeding device, which is applied to the gasification of granular/powdered fuel, the production of combustible gas, and the mitigation of combined combustion, etc. The effect of flexible raw material throughput, flexible fuel throughput, and reduced processing load
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[0041] The present invention will be described below with reference to specific embodiments. These embodiments are only used to illustrate the purpose of the present invention and do not limit the scope of the present invention in any way.
[0042] The two-stage gasification method for solid fuel with wide particle size distribution of the present invention includes the following steps:
[0043] 1) The fuel is fed into the fluidized bed pyrolyzer through the feeding device, and gasification agent is added to the fluidized bed pyrolyzer at the same time, and the fuel is dried / heated under the heating of the semi-coke and gasification agent of the pyrolyzer Decomposition or partial gasification to produce solid products containing semi-coke and gas products containing pyrolysis gas, tar or steam;
[0044] 2) The solid and gas products produced in step 1) are fed into the entrained bed gasifier together, and gasification agent is added to the entrained bed gasifier to complete the compl...
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