Wet desulphurization absorption tower

Abstract

The invention discloses a wet desulphurization absorption tower which comprises a tower body, a spraying main pipe outside the tower body and a plurality of in-tower spraying branch pipes arranged inthe tower body; a flue gas inlet is formed in the side surface of the tower body; a plurality of efficient atomizing nozzles are connected to each spraying branch pipe in the tower body; a slurry outlet at the bottom of the tower body is communicated with a spraying main pipe outside the tower through a slurry circulating pump; the working pressure of the efficient atomizing nozzles is less than 60kPa; the flow of the efficient atomizing nozzles is less than 30m <3> / h. The absorption tower not only can reduce the lift of the slurry circulating pump to realize energy-saving operation, but alsocan improve the number of the arranged nozzles and the coverage rate of sprayed slurry; desulfurization efficiency can be improved; meanwhile, the problems of difficulty in arrangement of nozzles in the tower, flue gas escape and the scour of the main pipe due to large-diameter spraying of the main pipe can be avoided.

Description

technical field [0001] The invention belongs to the technical field of wet flue gas desulfurization, and relates to a wet desulfurization absorption tower. Background technique [0002] In recent years, with the increasingly stringent environmental protection policies in various places, all coal-fired boilers that are eligible for transformation in the country are required to strive to achieve ultra-low emissions. Not higher than 10, 35, 50 mg / m3. Most domestic coal-fired boiler flue gas desulfurization adopts wet desulfurization technology (about 90%), so the ultra-low emission of sulfur dioxide is mainly realized by ultra-low emission transformation of wet desulfurization system. [0003] The core equipment of the wet desulfurization system is the absorption tower device. The arrangement and operation mode of the spray layer and its nozzles directly affect the desulfurization efficiency of the absorption tower device. In recent years, most ultra-low emission transformati...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a wet desulfurization absorption tower, which can not only reduce the lift of the slurry circulation pump to realize energy-saving operation, but also increase the number of nozzles and the spray slurry coverage , improve the desulfurization efficiency, and at the same time avoid the problems of difficult nozzle arrangement in the tower, flue gas escape and main pipe erosion caused by large-diameter spray main pipes

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