Combustible solid waste pyrolysis device and pyrolysis method

Abstract

The invention discloses a combustible solid waste pyrolysis device and a pyrolysis method. The pyrolysis device comprises a fluidized bed pyrolysis reactor and a fluidized bed combustion reactor whichadopt heat carrier bed material interactive circulation. Combustible solid waste fuel is pyrolyzed in the fluidized bed pyrolysis reactor, and a heat carrier bed material overflows and is sent to thecombustion reactor through a star-shaped return feeder; the heat carrier bed material is heated again by utilizing heat released by pyrolysis oil gas combustion in the combustion reactor; and the heated heat carrier bed material enters the pyrolysis reactor again through a fluidized bed return feeder. Heat generated by combustion is transmitted to a pyrolysis process by utilizing interactive circulation of the heat carrier bed material between the two reactors, so that the problem of non-uniform temperature in reactors caused by heat transfer of conventional reactors is solved; the star-shaped return feeder for pyrolysis material returning achieves a good sealing effect, the fluidized bed material return feeder for combustion material returning avoids high oxidation and deformation of mechanical moving parts, and meanwhile the solid circulation flux can be controlled.

Description

technical field [0001] The invention relates to a combustible solid waste pyrolysis device and a pyrolysis method, belonging to the thermal treatment and reuse technology of combustible solid waste. Background technique [0002] A considerable amount of solid waste is generated in our country's production and life every year, including agricultural and forestry waste, municipal solid waste, municipal sludge, etc. The treatment and efficient utilization of these solid wastes is of great significance. [0003] Solid waste treatment has a long history. In the early days, because of the small size of the city, small-scale solid wastes were buried or piled nearby. With the development of society, more and more solid wastes are produced, and environmental protection requirements have become More stringent, solid waste treatment technology continues to develop, and has achieved remarkable results in reduction, recycling and harmlessness. Currently, more representative treatment tec...

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Problems solved by technology

[0004] However, the generation of solid waste has certain regional and seasonal characteristics, and the composition of solid waste fluctuates widely, which makes it difficult to control the pyrolysis of combustible solid waste in practical industrial applications. At the same time, the proportion of each component of the product changes. also more obvious

The double fluidized bed system can better solve the appeal problem. However, when the double fluidized bed is used for pyrolysis combustion, the control of high-temperature circulating materials between the two furnaces is the key. The existing technology adopts pneumatic conveying or high-temperature Jiaolong mechanical conveying, etc. method, the system is complicated and the reliability is poor. To realize the circulation flow of a large amount of high-temperature circulating materials between the two furnaces, and to prevent the pyrolysis oil gas and flue gas from colluding between the two furnaces, the existing technology is difficult to solve

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