Method for reducing generation of aerosol during ammonia desulfurization

Abstract

The invention relates to a method for reducing generation of aerosol during ammonia desulfurization, and belongs to the technical field of ammonia-acid process desulfurization. The method comprises the following steps of (1) injecting ammonia water into an ammonia absorption tower; starting a primary absorption circulation pump to perform spraying washing; removing most SO2 in desulfurization smoke gas; (2) injecting the ammonia water into the ammonia absorption tower; performing spraying washing; performing further reaction on the spraying liquid and SO2 smoke gas; removing contaminants in the smoke gas; (3) passing the smoke gas subjected to secondary absorption through a water washing spraying device; washing impurities such as aerosol in the smoke gas; (4) finally, purifying impurities of liquid foam, residue aerosol and the like carried by the smoke gas washed by water in the washing and spraying processes through a foam removing device; discharging the cleaned tail gas in a standard reaching manner. The aerosol phenomenon generally existing in the ammonia water process desulfurization process is controlled; the smoke gas tailing phenomenon is avoided; the pollution of the chimney tail gas contaminant discharge to the peripheral soil, underground water and human bodies can be avoided; good environment benefits and social benefits are realized.

Description

technical field [0001] The technical field of ammonia desulfurization of the present invention, in particular, relates to a method for reducing the generation of ammonia desulfurization aerosol. Background technique [0002] Low concentration SO in the lead system of Huize Smelting Branch of Yunnan Chihong Zinc and Germanium Co., Ltd. 2 The flue gas process mainly deals with the three mixed flue gases from the fuming furnace, multi-hearth furnace and reduction furnace, and adopts the combined desulfurization process of zinc oxide + amino acid method. low concentration of SO 2 The zinc oxide desulfurization process in the first half of the flue gas treatment device uses zinc oxide as a desulfurizer, and the second half of the device uses the acid desulfurization method to effectively recover SO in the flue gas 2 , and then return to the acid system, at the same time, the heavy metals in the flue gas are treated in the process to reduce their pollution, and the by-product am...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the technical deficiencies in the background technology, the present invention proposes a method for reducing the generation of ammonia-based desulfurization aerosols. Through process adjustment control and structural transformation in the absorption tower, the generation and treatment of aerosols can be suppressed, and the aerosols can be prevented from being accompanied by chimney tail gas. Bring out, meet the exhaust gas chimney pollutant emission standards, and at the same time improve the "tailing" phenomenon of chimney tail gas, avoid affecting the surrounding environment, with obvious environmental and social benefits

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