Charcoal-containing flying ash recycling system based on electric bag dust remover

Abstract

The invention provides a charcoal-containing flying ash recycling system based on an electric bag dust remover. The charcoal-containing flying ash recycling system comprises a combustion furnace. Theupper portion of the combustion furnace circumferentially protrudes outwards to form retention parts. Each retention part is provided with a plurality of return ports which communicate with a flow guide pipe of an annular structure. An air outlet of the combustion furnace is connected with an electric dust removal device. A storage hopper of the electric dust removal device is connected with the flow guide pipe through a material sealing pump. Charcoal-containing flying ash in the storage hopper is conveyed by the material sealing pump to the flow guide pipe and enters the retention parts through the return ports and is sufficiently combusted in the combustion furnace due to a circulation area formed in the retention parts under the common action of inclined downward wind of the retentionparts and vertical upward wind at the bottom of the combustion furnace, so that the problem that flying ash in an existing combustion furnace is high in charcoal content is effectively solved.

Description

technical field [0001] The present application relates to the technical field of circulating fluidized bed boilers, in particular to a carbon-containing fly ash recycling system based on an electric bag filter. Background technique [0002] The circulating fluidized bed boiler is a clean coal combustion technology with a high degree of industrialization. The existing boilers have the problem of high fly ash residual carbon, and the high fly ash residual carbon of the circulating fluidized bed boiler will lead to the following problems: [0003] (1) The carbon content of fly ash is high, the fuel coal cannot be fully burned, the thermal economy of the circulating fluidized bed boiler is reduced, and the coal consumption per ton of steam is increased; [0004] (2) Fly ash has high carbon content, which virtually increases the output of boiler coal ash, resulting in high residual carbon content in boiler coal ash, making it difficult to utilize coal ash as a resource; [0005]...

AI Technical Summary

Problems solved by technology

[0003] (1) The carbon content of fly ash is high, the fuel coal cannot be fully burned, the thermal economy of the circulating fluidized bed boiler is reduced, and the coal consumption per ton of steam is increased;

[0004] (2) Fly ash has high carbon content, which virtually increases the output of boiler coal ash, resulting in high residual carbon content in boiler coal ash, making it difficult to utilize coal ash as a resource;

[0005] (3) The increase in the amount of ash discharged from the furnace will increase the enthalpy of the exhaust gas, increase the heat loss of the boiler, and increase the overall thermal efficiency loss;

[0006] (4) The higher ash temperature will affect the safe operation of the follow-up bag filter, which will easily cause fire holes in the filter bag and reduce the service life of the filter bag

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