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Summary : China is a coal-based energy structure to the country, air pollution is a soot-based pollution, dust, sulphur dioxide (SO2), nitrogen oxides (NOx) is the major atmospheric pollutants. Current and more effective means of gas desulfurization is (Flue Gas Desulfurization short for "FGD"). Gas desulfurization is the sulphur dioxide emissions from coal-fired power plants and other major control measures. And wet limestone washing France is the world's largest and most mature application of the technology. State Power Corporation has identified as wet limestone desulfurization processes gas desulfurization plant fire leading technology. Limestone (lime) - gypsum wet desulfurization plant and the nonferrous metals industry is the main form of gas desulfurization, which has crafts mature reliable, high desulfurization efficiency, desulfurization agents rich sources of raw materials and by-products such as gypsum may use advantages.