Desulfurating, dust-removing, demisting and water-saving process for wet-type desulfurization tower and apparatus thereof

Abstract

The invention discloses a desulfurating, dust-removing, demisting and water-saving process for a wet-type desulfurization tower and an apparatus thereof, relates to the field of exhaust gas purification, and aims at solving the problems of gypsum rain in a wet desulfurization process and high wet-type electrostatic dust-removing cost. The apparatus comprises an impingement cooling chamber, a coalescence chamber, and a fine particle filtering unit, wherein an upper opening of the impingement cooling chamber is connected with a lower opening of the coalescence chamber through a passage; the fine particle filtering unit is fixed on the top of the coalescence chamber; an atomizing spray nozzle is further arranged at the central position, close to the lower opening, of the coalescence chamber; and the atomizing spray nozzle is upward and is connected with external water supply equipment through a pipeline. The apparatus disclosed by the invention is low in cost, simple to mount, long in service life, and free of risk of blockage caused by scaling; the problem of gypsum rain is solved; water in separated flue gas can be recycled into to the desulfurization system through a pipeline; and the separated water can be used for the desulfurization system, so that the desulfurization system almost realizes no water supplement.

Description

technical field [0001] The invention relates to the field of waste gas purification, and specifically designs a wet-type desulfurization tower dedusting and demisting water-saving device, which is suitable for wet desulfurization systems, further dedusting and defogging the saturated flue gas behind the desulfurization tower, and recovering the saturated flue gas. free water and some water vapour. Background technique [0002] my country is a large coal-burning country. The sulfur dioxide, nitrogen oxides and dust produced by coal combustion have caused serious pollution to the atmospheric environment of our country. The flue gas desulfurization, denitrification and dust removal devices have played an important role in improving the atmospheric environment of our country. [0003] At present, my country's denitrification device is mainly based on the SCR process, supplemented by SNCR technology; the dust removal device is mainly based on electrostatic precipitator, bag filte...

AI Technical Summary

Problems solved by technology

[0005] Another problem easily caused by wet desulfurization is the problem of "chimney rain". Chimney rain is acidic and contains dust, gypsum, limestone and dissolved salts, which brings new environmental problems around the power plant

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