Flue gas desulfurization dust and mist removal method

Abstract

The present invention provides a flue gas desulfurization dust and mist removal method, a desulfurization medium is an alkaline liquid; a desulfurization tower bottom zone liquid enters respectively from absorption reaction zone bottom and upper parts into a desulfurization tower, a circulating fluid entering from the bottom part is atomized into small liquid drops, parallelly flows with fuel gas, and meanwhile complete sulphide absorption reaction with the countercurrent circulating liquid; by use of alkaline liquid small liquid drop parallel flow capture and venturi particle capture two-level dust removal, and arrangement of surface coalescing and multi-stage cyclone for mist removal, flue gas purification can be achieved.

Description

technical field [0001] The invention belongs to the technical field of industrial flue gas purification, and in particular relates to a flue gas wet desulfurization, dust removal and fog removal method. Background technique [0002] With the rapid development of social economy and the increase of energy demand year by year, the amount of industrial waste gas is increasing rapidly, and with the increase of sulfur, nitrogen and dust waste gas, the national environmental protection regulations will become increasingly strict. Therefore, the purification of flue gas Processing is imminent. Flue gas desulfurization is the most effective and main technical means to control acid rain and sulfur dioxide pollution, but its basic principle is to use an alkaline substance as an absorbent for sulfur dioxide. The traditional wet desulfurization technologies mainly include limestone-gypsum method, seawater desulfurization method, ammonia desulfurization method, double alkali desulfurizat...

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Problems solved by technology

[0008] From the advantages and disadvantages of the above several desulfurization technologies, it can be seen that the existing wet desulfurization technology mainly uses countercurrent spraying, and the alkaline slurry is sprayed from the top of the desulfurization tower into the desulfurization tower, and freely settles under the action of gravity to contact with the flue gas countercurrent Realize the desulfurization reaction, but the average liquid equivalent diameter of the liquid droplets in the existing wet desulfurization technology is 3-5mm or even larger, and the contact area between a single droplet and the flue gas is very small, so the amount of circulating slurry has to be increased to increase the desulfurization effect , resulting in a large flow rate of the slurry circulation pump, thereby increasing the power of the motor, increasing the power consumption of the pump, and high operating costs

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