Patent ID: 9649594
Date: 2017-05-16
CPC Classifications: B01D,F23J

Claim:
1. A method of reducing pollutants in the flue gas from a furnace, comprising the steps of: arranging a dual injection grid with at least one injection tube in fluid communication with a flow of the flue gas, the injection tube comprising an inner shell surrounded by an outer shell, the inner shell having at least one nozzle, the outer shell having at least one aperture; providing a first chemical to the inner shell; providing a second chemical to the outer shell; injecting the first chemical into the flue gas through the at least one nozzle; injecting the second chemical into the flue gas through the at least one aperture; and wherein at least one of the first and second chemicals is a mixture of ammonia or urea with an aqueous alkali or alkaline sorbent.