Waste heat comprehensive utilization system for fluidized bed

Abstract

The invention discloses a waste heat comprehensive utilization system for a fluidized bed. The waste heat comprehensive utilization system comprises the fluidized bed, a flue gas pipeline, a slag discharge pipeline, a slag cooler connected to the slag discharge pipeline, and a waste heat boiler connected to the slag cooler, wherein the waste heat boiler comprises an air channel, a first water tank and a second water tank which are sequentially arranged at the outer side of the air channel in an air flow direction of the air channel; at least one first through hole is formed in the air channel which corresponds to the first water tank; the first through hole is provided with a spray tube section in a downward extending manner; a heat exchange barrel, which is concentric with the spray tube section and is arranged in the air channel, is arranged outside the spray tube section in a sleeved manner; the first through hole is provided with a water supply tube section in an upward extending manner; the top of the water supply tube section is arranged at the outer side of the first water tank; the water supply tube section communicates with the spray tube section; at least one second through hole is formed in the air channel which corresponds to the second water tank; a heat tube is inserted into the second through hole; the evaporation end of the heat tube extends into the air channel; and a condensation end of the heat tube extends into the second water tank.

Description

technical field [0001] The invention relates to a waste heat recovery system, in particular to a waste heat recovery system for a fluidized bed. Background technique [0002] In the face of increasingly severe environmental problems and energy crises, the whole world is vigorously advocating energy conservation and emission reduction, especially for industrial kiln related industries with serious energy consumption and pollution. Factors that personnel must consider when designing such equipment. [0003] Taking the fluidized bed as an example, the flue gas temperature at the flue gas outlet usually reaches about 800 degrees Celsius, and the temperature of the discharged slag is as high as 1000 degrees Celsius. If the flue gas and slag are directly discharged into the environment, it will not only cause energy waste, but also cause a certain degree of damage to the environment. [0004] For example, Chinese patent 201420786054.0 discloses a circulating fluidized bed gasifi...

AI Technical Summary

Problems solved by technology

However, the energy-saving device designed in this patent can only be used to dry sludge, and there is no secondary combustion of the exhausted flue gas and residual smoke in the slag, and there is no secondary utilization of the waste heat of the flue gas and slag

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