Semi-dry method flue gas desulfurization technique

Abstract

The invention provides a novel stack gas desulphurization process adopting the semi-dry process, which is characterized in that: (1) powdered neutralizer is uniformly wetted; (2) the powdered neutralizer is separately put into a fume conduit, forms mixed gas flow with fume and enters a reaction tower; (3) in the reaction tower, atomized water is adopted to further wet the neutralizer and the fume so that SO2 and other acidic gases in the fume react with the powdered neutralizer to generate solid salt; after the reaction, the fume gets out of the reaction tower and enters a dust catcher; the dust catcher is used to remove the solid salt before the fume is discharged. By adopting the process, acid injurious ingredients in the fume such as SO2 and so on react with the neutralizer to generate vitriol and so on, so that the acid ingredients in the gas become solid salt, and are removed from the gas, thus purifying the gas which can be discharged according to the state emission standard.

Description

technical field [0001] The invention relates to the environmental protection technology of flue gas desulfurization, in particular to a semi-dry flue gas desulfurization process. Background technique [0002] With the acceleration of China's urbanization (development), the problem of air pollution will become more and more prominent. The sulfur dioxide emitted in the industrial flue gas is one of the important factors that cause air pollution in the industrial area and even the whole area. The control of sulfur dioxide pollutants will be one of the primary tasks of air pollution control in my country at present. At present, desulfurization technology can be summarized into four categories: (1) desulfurization before combustion, such as coal washing, microbial desulfurization; (2) desulfurization during combustion, such as industrial briquette sulfur fixation, calcium injection in the furnace; Desulfurization, that is, flue gas desulfurization (FGD); (4) New technology (such...

AI Technical Summary

Problems solved by technology

This kind of dosing method has high requirements on the atomizer, and the mechanical performance, mechanical manufacturing and patents can only be imported, which is expensive and unaffordable for most enterprises.

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