Apparatus and method for flue gas recirculation in a solid fuel boiler

Abstract From the Canadian patent

This invention relates to the field of utilizing flue gas recirculation on solid fuel first boilers and furnaces. Flue gas recirculation (FGR) in boilers and furnaces is a technique generally known in the prior art. Flue gas is commonly introduced into a combustion chamber within a boiler above the burning fuel bed. This continual recycling of the flue gas results in a further burning of smoke and other particulate matter contained therein. Additionally the formation of various nitric, and nitrous oxides and carbon monoxide gases in the flue gas is reduced thereby minimizing the releasing of these undesirable gases into the atmosphere. The present invention teaches an improvement in the use …