Patent ID: 7622092
Filing Date: 2009-11-24
Classification: B01D,F23J,Y02A,Y10S

Abstract:
1. A method of removing mercury from exhaust gas that contains nitrogen oxide, sulfur oxide, and mercury, the method comprising: converting a non-gaseous-mercury-chlorinating agent, which is non-gaseous at room temperature and normal pressure, into gaseous-mercury-chlorinating agent by heating the non-gaseous-mercury-chlorinating agent with heat of hot air generated by using the exhaust gas or hot air generated by using an air heater installed in a flue that conveys the exhaust gas; supplying the gaseous-mercury-chlorinating agent to the exhaust gas in the flue thereby obtaining agent-added exhaust gas; performing selective catalytic reduction on the agent-added exhaust gas by using a solid catalyst thereby obtaining denitrated exhaust gas; and performing wet desulfurization on the denitrated exhaust gas by using an alkali absorbing solution thereby obtaining desulfurized exhaust gas.