Intelligent anti-blocking demister used for wet flue gas desulfurization

Abstract

The invention discloses an intelligent anti-blocking demister used for wet flue gas desulfurization. The intelligent anti-blocking demister comprises a demister body, at least a first order demisting system is provided in the demister body, the demisting system is connected with a PLC control system; the demisting system comprises a first flushing layer, a swing type baffle demisting layer, a second flushing layer, a silk screen demisting layer and a third flushing layer which are successively arranged in an ascending order. The swing type baffle demisting layer is capable of removing liquid drops with large diameter, realizing crude demisting and decontamination, increasing the flushing coverage rate of a nozzle, minimizing the flushing blind area and effectively solving the problems of fouling and blocking of the demister; the silk screen demister is capable of removing the droplets with small diameter in flue gas after performing crude demisting to realize fine demisting. The demister has the advantages of high demisting efficiency, safe and stable operation, uses intelligent control and is capable of effectively preventing the generation of fouling and blocking. The intelligent anti-blocking demister can be widely used in flue gas desulphurization demisting systems of industries like electric power, petrochemistry, metallurgy and cement.

Description

technical field [0001] The invention relates to flue gas desulfurization and mist removal equipment, in particular to an intelligent anti-blocking demister for wet flue gas desulfurization. Background technique [0002] Mist eliminator is an important equipment of wet flue gas desulfurization system. The flue gas treated by the desulfurization absorption tower entrains a certain amount of liquid droplets, especially when the flow rate of the flue gas in the absorption tower is high, the amount of liquid droplets carried by the flue gas will increase, forming a "fog" with a particle size of 10-60 μm. "Fog" not only contains water, it also dissolves sulfuric acid, sulfate, SO 2 Wait. If these droplets are not removed, the slurry will deposit on the surface of the heat exchanger and flue after the absorption tower, forming gypsum scale, staining and severely corroding the equipment, and will also affect the heat exchange effect of the flue gas reheater. The demister is the k...

AI Technical Summary

Problems solved by technology

This type of flushing will cause flushing blind areas during long-term use, which will easily lead to blockage of the flow-through part, resulting in failure of the mist eliminator.

Moreover, it is difficult to find out in time when the blockage occurs. When the blockage is serious, it will affect the operation of the entire unit or even stop it.

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