METHOD FOR ADJUSTING SULFUR DIOXIDE CONCENTRATION IN SMOKE GASES

摘要

In a method for adjusting the sulfur dioxide (SO 2) content in flue gases, by scrubbing with a suspension (6) containing water and lime in a tower (2), blowing oxidizing agent into the suspension and venting the SO 2-depleted exhaust gas, the SO 2 content in the starting and/or purified gas is measured continuously or at specific intervals and oxygen is mixed with the oxidizing agent in an amount dependent on the measured SO 2 content. An independent claim is included for a flue gas desulfurization plant (1), comprising a scrubbing tower (2) for introducing SO 2-containing gas into a scrubbing suspension (6); a device (7) for supplying oxidizing agent into the suspension; a device (8, 9) for feeding oxygen into the suspension and/or the oxidizing agent; and a measuring and regulating system (16, 17, 18), connected with the oxygen feeding device, for determining the SO 2 content of the starting gas and/or the purified gas.