Patent ID: 7572420
Filing Date: 2009-08-11
Classification: B01D,F23J

Abstract:
1. A method for removing mercury in exhaust gas, in which mercury in exhaust gas discharged from combustion equipment is removed, characterized by comprising: a mercury oxidation process in which mercury in said exhaust gas is converted to mercury chloride in the presence of a catalyst; a contact process in which said exhaust gas is brought into contact with an absorbing solution in a scrubber to absorb and remove mercury components from said exhaust gas; a control process in which blowing of air into said scrubber is accomplished, and the amount of blown air is regulated to control the oxidation-reduction potential of said absorbing agent; and a gas liquid contact process comprising a mist eliminator which includes a cleaning solution, to which air is added, which is in contact with said exhaust gas, wherein the oxidation-reduction potential of said cleaning solution is controlled by the blowing of air, so as to be at least 600 mV.