Flue gas desulphurization system and flue gas desulphurization method

Abstract

The invention relates to an energy-saving flue gas desulphurization system and a flue gas desulphurization method. The flue gas desulphurization system comprises: an absorbing tower which comprises a housing, a flue gas inlet for supplying the flue gas into the housing, a barren liquor inlet for supplying the barren liquor containing a desulfurizer into the housing, a clean flue gas outlet for discharging the clean flue gas with sulfur dioxide being removed, and a rich liquor outlet for discharging the rich liquor with sulfur dioxide absorbed at a predetermined temperature; a regeneration tower which comprises a body, a regenerated gas outlet for discharging the regenerated gas, a rich liquor inlet for supplying part of the rich liquor into the body, and a barren liquor outlet located at the body bottom and used for discharging the barren liquor with sulfur dioxide being precipitated, wherein the rich liquor inlet of the regeneration tower is connected with the rich liquor outlet of the absorbing tower, and the barren liquor outlet of the regeneration tower is connected with the barren liquor inlet of the absorbing tower; and a rich liquor circulating pump which is connected with the rich liquor outlet and the barren liquor inlet of the absorbing tower, and is used for returning the other part of the rich liquor discharged from the absorbing tower back to the absorbing tower.

Description

technical field [0001] The invention relates to a flue gas desulfurization system and a flue gas desulfurization method. Background technique [0002] Sulfur dioxide pollution has become an important factor restricting the sustainable development of my country's economy and society, so it is imperative to control sulfur dioxide pollution. According to the "Twelfth Five-Year Plan" of environmental protection, by 2015, SO 2 The total emission should be reduced to 20.864 million tons, which is 8% lower than that in 2010. At the same time, the comprehensive utilization rate of industrial solid waste such as industrial gypsum must reach 75%. - Gypsum" desulfurization technology is limited by factors such as carbon dioxide emission reduction requirements and the difficulty of reusing desulfurized gypsum, and will gradually be replaced by other desulfurization technologies on a large scale. Moreover, existing organic amines, ionic liquids, citrates, and polymer absorbents are use...

AI Technical Summary

Problems solved by technology

Moreover, existing organic amines, ionic liquids, citrates, and polymer absorbents are used as absorbents and traditional absorption-heating regeneration absorbents are used to prepare high-purity SO 2 The existing flue gas desulfurization technology has problems such as high energy consumption and insufficient use of heat

[0003] Therefore, the existing flue gas desulfurization system and flue gas desulfurization method need to be improved

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