Combined thermal transition method and apparatus for solid fuel

A technology of solid fuel and thermal conversion, applied in the direction of granular/powdered fuel gasification, joint combustion mitigation, and production of combustible gas, which can solve the problems of not being able to directly produce syngas and meet the requirements of reducing material performance and processing difficulty , the effect of high-efficiency production

Inactive Publication Date: 2008-10-29
INST OF PROCESS ENG CHINESE ACAD OF SCI
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At the same time, the coking process only produces

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  • Combined thermal transition method and apparatus for solid fuel
  • Combined thermal transition method and apparatus for solid fuel
  • Combined thermal transition method and apparatus for solid fuel

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[0037] attached figure 2 It is a schematic structural diagram of the most basic combined thermal conversion device for implementing the combined thermal conversion method of the present invention. It mainly consists of a fluidized bed pyrolysis reactor 1 , a fluidized bed gasification reactor 2 , a transport bed combustion reactor 3 , and a washing condenser 10 . The first material seal 12 placed in the fluidized particle bed of the fluidized bed gasification reactor 2 communicates with the upper part of the fluidized bed pyrolysis reactor 1, and makes the fluidized bed gasification reactor 2 and the flow The bed pyrolysis reactor 1 has an integrated structure. The second material seal 23 placed in the fluidized particle bed of the fluidized bed gasification reactor 2 communicates with the lower part of the transport bed combustion reactor 3 through a communication pipe 233 . The upper outlet of the fluidized bed gasification reactor 2 is connected to the cyclone separator ...

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Abstract

The invention relates to a thermal conversion method and a thermal conversion device of solid fuel, wherein the thermal conversion of the solid fuel is composed of three independent and association-controllable sub-processes of pyrolysis, gasification and burning by decoupling the integrated pyrolysis, gasification and burning reactions in the conventional thermal conversion process. A hot carrier substance is circulated among the sub-processes, so that the burning sub-process provides reactive heat to the pyrolysis and the gasification sub-processes and simultaneously provides oxygen to the gasification process to initiate internal burning so as to compensate for the gasification reaction heat that the hot carrier substance is unlikely to supply. Accordingly, the thermal conversion method can control the three thermochemical reactions of pyrolysis, gasification and burning by decoupling, recombination and association to achieve combined production of pyrolysis oil, synthesis gas and heat. Different from conventional single conversion devices for burning, gasification and pyrolysis, the thermal conversion method of the invention has the advantages of compact structure, high heat utilization efficiency and greatly reduced oxygen consumption for synthesis gas production, thus achieving high-value comprehensive conversion and utilization of solid fuels such as brown coal, bituminous coal and biomass.

Description

technical field [0001] The invention belongs to the technical field of solid fuel energy, and in particular relates to a method for decoupling the three chemical reactions of pyrolysis, gasification and combustion that occur in the thermal conversion process of solid fuel, so that these reactions can be carried out independently and then implemented. Co-production of pyrolysis oil, syngas and combustion heat with controllable production volume is achieved through joint regulation, and the production of syngas is greatly reduced by using the combustion heat generated by air combustion to provide the reaction heat required for pyrolysis and gasification reactions A novel thermal conversion technology method for oxygen consumption and a thermal conversion device for realizing the method. The solid fuel combined thermal conversion method and conversion device are particularly suitable for solid fuels with high volatility and high tar generation in pyrolysis, such as lignite, bitum...

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Application Information

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IPC IPC(8): C10G1/00C10J3/86C10J3/56
CPCY02E20/18
Inventor 许光文刘新华高士秋
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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