24 USE OF SEA WATER IN FLUE GAS DESULFURIZATION Efficient removal of sulfur dioxide from a flue gas stream is achieved in a scrubber using a recirculating aqueous stream containing magnesium hydroxide and magnesium sulfite which together act as a SO2 absorbent. Magnesium sulfite is derived from magnesium hydroxide, which is the product of a reaction between soluble magnesium from the seawater and calcium hydroxide added to the scrubbing system. Magnesium sulfite and bisulfite are oxidized to magnesium sulfate by the introduction of air. Magnesium sulfate is converted back to magnesium hydroxide by reaction with additional calcium hydroxide, with gypsum as a by-product. Gypsum is soluble in large amounts of seawater and may be returned to the ocean without adverse environmental impact. 5268-332
申请公布号
CA1303822(C)
申请公布日期
1992.06.23
申请号
CA19880569677
申请日期
1988.06.16
申请人
BECHTEL GROUP INCORPORATED
发明人
ABRAMS, JACK Z.;BENZ, AUGUST D.;AWERBUCH, LEON;ZACZEK, STANLEY J.;HAIDINGER, JOHN