Circulating fluidized bed incineration boiler for combusting solid waste

Abstract

The invention relates to the technical field of boiler structures, in particular to a circulating fluidized bed incineration boiler for combusting solid waste. The circulating fluidized bed incineration boiler can effectively reduce the corrosion effect, does not have the phenomenon of material blockage, is continuous and stable in combustion and meets the flue gas emission standard. The circulating fluidized bed incineration boiler comprises a hearth, a separator device and a tail flue which are sequentially arranged; a material return device is arranged between the separator device and the hearth; a feeding pipe and a secondary air pipe are arranged on the side wall of the hearth; a fluidized bed is arranged at the bottom of the hearth; and an ignition device and primary air are arranged at the position of the fluidized bed. The circulating fluidized bed incineration boiler is characterized in that the hearth is composed of a water cooling wall; a refractory material layer is laid on the fire facing face of the hearth; the aperture ratio of an air distribution plate of the fluidized bed is 2%-4%; air caps are staggered on the air distribution plate; the air distribution plate is connected with a slag tube; an air cooling flue is arranged between the separator device and the tail flue; an ash discharging pipe is arranged at the bottom of the material return device; a high-temperature superheater is installed in the material return device; and the tail flue comprises a front ascending flue and a rear descending flue.

Description

technical field [0001] The invention relates to the technical field of boiler structures, in particular to a circulating fluidized bed incineration boiler for burning solid waste. Background technique [0002] With the development of industry, the increasing development of urban construction and the continuous improvement of people's living standards, the discharge of municipal solid waste and industrial waste is increasing day by day, causing increasingly serious environmental problems. Environmental protection policies are becoming more and more stringent, and various regions have introduced the principle that whoever produces solid waste should dispose of it. It cannot be disposed of at will (landfill), nor can it be left out of the area, but can only be disposed of locally. According to the "Law on the Prevention and Control of Environmental Pollution by Solid Waste", solid waste treatment needs to follow the "three principles", that is, harmlessness, reduction, and recy...

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problems of unstable burning of solid waste in existing boilers, easy occurrence of coking and blockage, corrosion caused by flue gas and substandard discharge, the present invention provides a circulating fluidized bed incineration boiler for burning solid waste, which can effectively Reduce corrosion effect, no material blocking phenomenon, continuous and stable combustion, flue gas emission up to standard

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