Fluidized bed boiler combustion use garbage derivative fuel device and use method thereof

Abstract

The invention discloses a fluidized bed boiler combustion use garbage derivative fuel device and a use method thereof. The fluidized bed boiler combustion use garbage derivative fuel device comprisesa garbage washing device. The garbage washing device comprises multiple stages of washing centrifugal devices which are sequentially connected. Each washing centrifugal device comprises a washing tankand a centrifugal machine, wherein an outlet of the washing tank is connected with an inlet of the centrifugal machine in the same stage, a first solid outlet of the centrifugal machine of the stageis connected with the inlet of the washing tank of the next stage through a first control valve, and a liquid outlet of the centrifugal machine of the stage is connected with the inlet of the washingtank of any previous stage. The washing centrifugal devices are used for removing soluble chlorine salt in the garbage, and a second solid outlet of the centrifugal machine of any stage further communicates with a hearth of a boiler through a second control valve so that the garbage with the soluble chlorine salt removed can be sent into the boiler for combustion. By means of the fluidized bed boiler combustion use garbage derivative fuel device and the use method thereof, a repeated washing program is conducted on the garbage, and it is ensured that the soluble chlorine salt in the garbage iscompletely removed; and the phenomenon that chlorine in the garbage damages boiler equipment in the later treatment process is avoided.

Description

technical field [0001] The invention relates to the technical field of circulating fluidized bed boilers, in particular to a waste-derived fuel device for a fluidized bed boiler and a method for using the same. Background technique [0002] In recent years, with the continuous development of my country's social economy and the continuous growth of the urban population, the total amount of urban domestic waste has shown a rapid growth trend, and the reduction, recycling and harmless treatment of domestic waste has become an urgent social issue. problem. At present, my country's urban industrial waste and domestic waste treatment facilities and construction projects are relatively lagging behind, the level of comprehensive utilization and treatment is low, and capital investment is limited. [0003] my country's treatment principles for industrial waste and domestic waste are reduction, recycling and harmlessness. The preferred disposal method is comprehensive utilization, and...

AI Technical Summary

Problems solved by technology

However, there are also similar problems in the disposal of domestic waste fluidized bed boilers: the chlorate produced by large-scale CFB boilers burning domestic waste-derived fuels has a corrosive effect on the heating surface of the boiler and the tail flue, affecting the safe operation of the boiler. The chlorine content of fly ash produced by burning chlorine-containing garbage will also be high, which will affect the resource utilization of boiler fly ash

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