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Advanced Technology of Flue Gas Desulfurization ( FGD )

Mitsubishi Heavy Industries, Ltd. (MHI) has been developing and introducing various Double-Contact-Flow Scrubbers and Jet Air Sparger as part of flue gas desulfurization technology. The double-contact-flow scrubber features (1) super-high desulfurization performance, (2) simple structure and easy maintenance, and (3) no problems of scaling; and the Jet Air Sparger is characterized by (1) high air utilization efficiency, (2) possible elimination of oxidation air blower, and (3) no rotating elements and easy maintenance. A full scale FGD model has been constructed for the purpose of early development of next generation double-contact-flow scrubber technology, and expansion of sales to overseas markets. In actual plants, a desulfurization rate of 99.4% has been achieved by modifying the scrubber used in another process into a double-contact-flow scrubber.