Patent ID: 8926734
Filing Date: 2015-01-06
Classification: B01D,F23J

Abstract:
1. In a power generation plant having a boiler with a flue gas in a duct at a negative pressure to transport the flue gas out of the boiler, the flue gas comprising mercury, an induced-draft powdered activated carbon (“PAC”) injection system for positioning PAC in contact with at least a portion of the mercury in the flue gas such that a binding portion of PAC binds to the at least a portion of the mercury, enabling the bound mercury to be filtered out of the flue gas before the flue gas is exhausted, the induced-draft PAC injection system comprising: an injection line in fluid communication with the duct; a PAC storage element containing a plurality of PAC; and a feeder configured to receive the PAC from the PAC storage element and feed the PAC to the injection line; wherein the negative pressure in the duct induces a negative pressure in the injection line to support the transportation of at least a first portion of PAC through the injection line and into the duct.