Garbage incineration grate furnace based on circulating fluidized bed furnace body

Abstract

The invention discloses a garbage incineration grate furnace based on a circulating fluidized bed furnace body, which comprises a hearth, a boiler barrel, a cyclone separator, a first vertical shaft flue, a second vertical shaft flue, a tail vertical shaft flue, a superheater, a coal saver and an air preheater, wherein the hearth is provided with a lower water-cooled wall header; an incinerator isarranged below the hearth, and an expansion joint is arranged between the lower water-cooled wall header and the upper end of the incinerator; one side of the incinerator is connected to a feeding hole, and the other side of the incinerator is connected to a rear arch; the rear arch is connected to a slag discharge hole, a pushing fire grate is arranged at the bottom of the feeding hole and the bottom of the rear arch, and a plurality of ash buckets are arranged below the rear arch; and a material return leg of the cyclone separator is connected to the rear arch, and a flap valve is arrangedin the material return leg. The garbage incineration grate furnace has the advantages of being small in transformation workload and short in period, can directly feed garbage into the incinerator forcombustion without crushing and screening, can greatly improve continuous operation time of the incinerator, and improves production efficiency and economic benefits.

Description

technical field [0001] The invention relates to a waste incineration grate furnace based on a circulating fluidized bed furnace body. Background technique [0002] At present, waste incineration power generation technology is mainly divided into two schools: circulating fluidized bed technology and grate furnace technology. In the early days, circulating fluidized bed technology was the main technology, but because urban domestic waste contains a large amount of construction waste, stones, iron wires and other debris, when using circulating fluidized bed boilers for power generation, the waste needs to be crushed and screened before entering the furnace , otherwise, a series of problems may occur, such as blockage of the feeding port, wind caps wound by iron wires, and damage to the caps by stones, etc., which will affect the fluidization effect and the continuous and stable operation of the boiler, so the workload in the early stage is heavy; even so, with the running time ...

AI Technical Summary

Problems solved by technology

In the early days, circulating fluidized bed technology was the main technology, but because urban domestic waste contains a large amount of construction waste, stones, iron wires and other debris, when using circulating fluidized bed boilers for power generation, the waste needs to be crushed and screened before entering the furnace , otherwise, a series of problems may occur, such as blockage of the feeding port, wind caps wound by iron wires, and damage to the caps by stones, etc., which will affect the fluidization effect and the continuous and stable operation of the boiler, so the workload in the early stage is heavy; even so, with the running time Cumulatively, the air distribution plate is still unavoidably clogged and damaged. The continuous operation time of garbage incineration using circulating fluidized bed technology is generally about one month, and the longest is no more than 3 months. Frequent maintenance affects production efficiency and economic benefits

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