Multi-compartment overfire air and N-agent injection system and method for nitrogen oxide reduction in flue gas

摘要

A combustion vessel having a combustion zone; a burnout zone downstream of the combustion zone; an overfire air chamber adjacent the burnout zone, wherein the chamber has an upstream air injector and a downstream air injector, and an agent injector for injecting a selective reducing agent into the burnout zone, wherein the agent injector extends through the downstream air injector.