Circulating fluidized bed combustion device with internal double-inlet cyclone separator

Abstract

The invention discloses a circulating fluidized bed combustion device with an internal double-inlet cyclone separator. The combustion device comprises a furnace chamber body (1), the double-inlet cyclone separator (2), a refeed downcomer (3) and a gas-water separator (10), wherein the inner wall of the vertically arranged furnace chamber body (1) is provided with a water wall; the furnace chamber body (1) comprises a furnace chamber dense-phase area (A), a furnace chamber lifting area (B) and a furnace chamber separating area (C) that are sequentially arranged from the bottom to up; the double-inlet cyclone separator (2) is coaxially arranged with a bed body in the furnace chamber separating area (C); the upper part of the flue gas inlet of the double-inlet cyclone separator (2) is arranged at the upper part of the furnace chamber separating area (C). According to the invention, gas-solid separating efficiency is improved, heat loss is reduced and boiler heat efficiency is improved.

Description

technical field [0001] The invention relates to a circulating fluidized bed combustion equipment with a built-in double-inlet cyclone separator, which can be used for combustion of various fuels such as coal, biomass, solid waste, urban and industrial sludge, and belongs to clean coal combustion technology and solid Waste treatment technology field. Background technique [0002] Circulating fluidized bed combustion technology is a clean coal combustion technology developed in the 1970s. Compared with conventional seam coal boilers and pulverized coal boilers, circulating fluidized bed boilers have particularly good fuel adaptability, high combustion efficiency, and load regulation performance. Strong, more suitable for supercritical parameters, good desulfurization effect in the furnace, less pollutant emissions, simple fuel pretreatment system and many other outstanding features and advantages. Due to the above-mentioned advantages, the circulating fluidized bed boiler has...

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Problems solved by technology

[0005] Technical problems: In view of the existing circulating fluidized bed, many unit components occupy a large space, the volume and weight of the gas-solid separator are too large, the difference in thermal expansion between the furnace and the device outside the furnace causes the unit to start and stop inertia, and the structure of the feeding mechanism is complex, etc. Problem, the present invention proposes a circulating fluidized bed combustion device based on a built-in double-inlet cyclone separator

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