Fly ash fluidized bed combustion decarburizing device

Abstract

The invention relates to the technical field of fly ash decarburization and discloses a fly ash fluidized bed combustion decarburizing device comprising a fly ash material bin, an air blower, an electric heating device, an air powder concentrator, a spiral feeding machine, a hearth, an ash cooler, a cyclone separator, a material return valve, an air heat exchanger, a dust remover, an induced draftfan and a chimney. According to the differences in the aspects of specific gravity and particle size between carbon not burned out and burned-out carbon in the fly ash, the fly ash is carried by hotair to enter an air powder concentrator to be screened, the large-particle and high-carbon-content fly ash falls into the bottom of the air powder concentrator to undergo a next procedure, so that only a part of fly ash needs to be re-combusted, and the work efficiency of reducing the carbon content of the fly ash is improved; and meanwhile, the carbon content in the fly ash combusted in the hearth is increased, the fly ash in the hearth can be stably combusted to emit a large amount of heat, and the utilization ratio of the fly ash is improved.

Description

technical field [0001] The invention relates to the technical field of fly ash decarbonization, in particular to a fly ash fluidized bed combustion decarburization device. Background technique [0002] Fly ash is the fine ash collected from the flue gas after coal combustion. Fly ash is the main solid waste discharged from coal-fired power plants. With the development of the power industry, the discharge of fly ash from coal-fired power plants It is imminent to increase the resource utilization of fly ash, but the carbon content in fly ash seriously affects its comprehensive utilization, so it is necessary to further decarbonize fly ash and reduce the proportion of carbon in fly ash. [0003] According to the fly ash fluidized bed combustion decarbonization device proposed in Patent No. 2011103276556, the carbon content of fly ash is reduced by reburning and cooling the fly ash with a carbon content greater than 12%, but this technology There are following deficiencies: ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a fly ash fluidized bed combustion decarburization device, which has the advantages of simple structure, wide range of action, and further decarburization of fly ash with carbon content at all levels, and solves the above-mentioned insufficient range of action. ill-structured problem

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