SYSTEM FOR CONTROLLING FLUE GAS EXIT TEMPERATURE FOR OPTIMALSCR OPERATIONS

摘要

A system for maintaining an optional flue gas inlet to a boiler mounted SCR assembly in the flue of the boiler is accomplished by mixing the normal inlet feedwat er to an economizer of the boiler with near saturation water from downcomers of the boiler to thereby raise the temperature of the flue gas passing across the economizer and raising the SC R inlet to the desired optimal SCR operation temperature.