A desulfurization process and device for quickly establishing a stable circulating fluidized bed

Abstract

The invention discloses a desulfurization process for rapidly building a stable circulating fluidized bed. According to the desulfurization process, solid particles in flue gas discharged from an outlet of a fluidized bed reaction tower after the desulfurization are separated, and the separated solid particles are back sprayed to the bottom of the fluidized bed reaction tower. The invention further discloses a desulfurization device for rapidly building the stable circulating fluidized bed, which comprises the fluidized bed reaction tower, a solid particle separation unit and a flue gas discharge unit, wherein a flue gas inlet, a desulfurizing agent inlet and a spray gun hole are formed at the bottom of the fluidized bed reaction tower; the solid particle separation unit comprises a cyclone separator and a dust remover which are sequentially connected, the cyclone separator comprises a fist solid particle outlet, the dust remover comprises a second solid particle outlet, the first solid particle outlet and the second solid particle outlet are respectively connected with the fluidized bed reaction tower through a solid particle return pipe, and the solid particle return pipe is inserted into the spray gun hole through a dry powder spray gun arranged at the tail end of the solid particle return pipe so that the solid particles after the separation are back sprayed to the bottom of the fluidized bed reaction tower.

Description

technical field [0001] The invention relates to the technical field of flue gas desulfurization, and more specifically, relates to a desulfurization process and device for quickly establishing a stable circulating fluidized bed. Background technique [0002] Mineral resources on the earth more or less contain S in the geological age of ore formation, and S may exist in the form of compounds or simple substances. After mastering the smelting technology, humans found that S in most mineral resources is a harmful element and must be removed during the smelting process. [0003] Under the guidance of the national government's "energy saving and emission reduction" policy, in recent years, many sintering plants and pelletizing plants in the iron and steel metallurgical industry have carried out some flue gas desulfurization projects, but most of the desulfurization effects are not satisfactory. Especially for vanadium-titanium magnetite, due to the particularity of vanadium-tita...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a desulfurization process and device that can quickly adjust the moisture content of the circulating fluidized bed and quickly establish a stable circulating fluidized bed, so as to solve the problems of fluidized bed collapse, spray gun blockage, reaction tower sticking wall, etc.

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