Combined thermal transition method and apparatus for solid fuel

A technology for solid fuel and thermal conversion, which is used in the gasification of granular/powdered fuels, mitigation of combined combustion, and preparation of liquid hydrocarbon mixtures. requirements, the effect of high-efficiency production

Inactive Publication Date: 2012-07-25
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Claims
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Problems solved by technology

At the same time, the coking process only produces associated gas and cannot directly produce syngas

Method used

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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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Embodiment Construction

[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. The pyrolysis oil is produced by fuel pyrolysis. The synthesis gas is produced by semicoke produced in the pyrolysis sub-process through gasification. The semicoke which is not gasified and the coal gas produced by the pyrolysis sub-process provide the whole reaction heat for the pyrollysis sub-process and provide most reaction heat for the gasification sub-process through air combustion. In order to realize the combustion heat transmission from a combustion sub-process to pyrolysis and gasification sub-processes, a hot carrier substance is circulated among each sub-process, at the same time the oxygen is supplied to the gasification sub-process, which causes the internal combustion of the gasification sub-process and generates the partial gasification reaction heat which is not provided by the hot carrier. 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. Compared with conventional single conversion devices, 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, thereby 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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