Turning-back desulfurization tower with tray on one side

Abstract

The invention relates to a turning-back desulfurization tower with a tray on one side. The bottom of the desulfurization tower is an oxidation crystallization slurry tank, the upper part of the desulfurization tower is a desulfurization area, and a turning-back section is arranged between the oxidation crystallization slurry tank and the desulfurization area; a vertical flue gas partition plate isarranged in the middle of the desulfurization area, and divides the desulfurization area into a down-flow-side desulfurization area and a reverse-flow-side desulfurization area which are separated left and right; a desulfurization tower inlet is formed in the upper part of the down-flow-side desulfurization area, and a down-flow-side spraying layer is vertically arranged in the down-flow-side desulfurization area; a desulfurization tower outlet is formed in the upper part of the reverse-flow-side desulfurization area, and a reverse-flow-side spraying layer is vertically arranged in the reverse-flow-side desulfurization area; the tray is vertically arranged below the reverse-flow-side spraying layer; and through holes are formed in the tray. According to the invention, two-section sprayingin the turning-back tower is used for washing and absorbing, so that high desulfurization efficiency and high dust removal efficiency are achieved. Meanwhile, the tray with the through holes is arranged at the lower part of the reverse-flow-side desulfurization area, and a very good uniform distribution effect of flue gas passing through the tray is achieved, so that the problem that the flue gasin the tower is not uniformly distributed is solved, and desulfurization efficiency of the absorption tower is improved.

Description

technical field [0001] The invention relates to the technical field of atmospheric control and environmental protection, in particular to a coal-fired flue gas desulfurization device. Background technique [0002] As the country puts forward higher requirements on the concentration of pollutant emissions, the emission limit of gas turbines, that is, SO 2 Emission concentration is less than 35mg / Nm 3 , which requires that both desulfurization devices that cannot meet the requirements of the new standard need to be upgraded. During the transformation and upgrading, the two furnaces and one tower desulfurization device built in the early stage is increasingly unable to meet the current national emission restrictions and requirements. It is necessary to transform the existing "two furnaces and one tower" into "one furnace and one tower". It is difficult to meet the requirements of the new standard because the flue gas volume is only half of the original, and demolition and rec...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a reentrant desulfurization tower with trays on one side, which can solve problems such as uneven distribution of flue gas in the tower and limited layout of the project site, and has pollution It has the characteristics of high waste removal efficiency, economical operation and convenient adjustment, especially suitable for the project of transforming the existing "two furnaces and one tower" into "one furnace and one tower"

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