Process and apparatus for the removal of mercury from sulfur...

Details Process and apparatus for the removal of mercury from sulfur... Process and apparatus for the removal of mercury from sulfur...

B - Operations, Transporting

01

D

23/387, 23/356.5

B01D 47/06 (2006.01) B01D 53/64 (2006.01)

Patent

CA 1201872

Abstract Mercury is removed from sulfur dioxide bearing hot and moist smelting-plant or roasting-plant gases by cooling and scrubbing the hot gases by means of a concentrated sulfuric acid mist in order to sulfate the mercury and to separate it from the gases. The cooling is carried out by vaporizing so much water or dilute sulfuric acid solution from the gases that the temperature of the gas drops to below the dew point, in order to produce a sulfuric acid mist which sulfates and washes the mercury, the gases being separated from the mist and directed to the sulfuric acid plant. The process can be carried out by means of nozzles installed in the pipe which feeds hot and moist sulfur dioxide bearing gases into the scrubbing tower of the sulfuric acid plant, water or acid obtained from the scrubbing tower being fed through the nozzles into the feed pipe in the form of a finely- divided mist.

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