Returning device applied to circulating fluidized bed semi-dry desulfurization

Abstract

The invention provides a returning device applied to circulating fluidized bed semi-dry desulfurization. The device comprises a bag dust remover, the lower end of the bag dust remover is connected with a manual plate inserting door, a port of the lower end of the manual plate inserting door is provided with a weighing device, the lower end of the manual plate inserting door is connected to a shipash hopper through a conduit, an air transporting incline groove is fixedly formed in the left end of the ship ash hopper, the right side of the air transporting incline groove is provided with a returning regulating valve, the right side of the ship ash hopper is provided with a returning material controller, and the returning material controller is respectively connected with the weighing deviceand the returning regulating valve through a wire. The device is simple in structure and convenient to operate, the material adaptability is wide, functions of the continuous and stable conveying ofdesulfurization ashes, the precise control of the returning amount, desulfurization ash timely discharging and the like are simultaneously achieved, and for a material with poor mobility, a material conveying capacity is improved by increasing the opening of the regulating valve and increasing a fluidizing wind pressure.

Description

technical field [0001] The invention is a material returning device applied to semi-dry desulfurization of a circulating fluidized bed, and belongs to the field of fluidized bed desulfurization equipment. Background technique [0002] In the circulating fluidized bed semi-dry desulfurization process, the desulfurization ash return system is a key subsystem that affects the desulfurization efficiency and the continuous and stable operation of the entire desulfurization system. At present, the return conveying parts of desulfurized ash in the semi-dry desulfurization process of circulating fluidized bed mainly include three conveying parts: air chute, conveying screw, and scraper machine. The return device is composed of these three conveying parts as the core. Different, more types. [0003] In the prior art, the desulfurization ash in the semi-dry desulfurization process of the circulating fluidized bed has the characteristics of small density, small particle size, and easy...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the desulfurization ash in the semi-dry desulfurization process of the circulating fluidized bed has the characteristics of small density, small particle size, and easy to be affected by moisture. With a free liquid surface, the fluidity is very strong; after being damp, the desulfurization ash is easy to form agglomerates and agglomerates, and the fluidity is poor

In the first case, the fluidity of desulfurization ash is too strong, and it is difficult to control the amount of material, which may easily cause the phenomenon that the amount of desulfurization ash cannot be controlled; The ash is blocked in the conveying system, and the return system device must adapt to the two working conditions of desulfurization ash, and a large amount of dust is easy to fall on the controller, which is not easy to clean, and will affect the use for a long time, so it is urgently needed to be used in circulating fluidized bed Semi-dry desulfurization return device to solve the above problems

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