LOW NOX BURNER USING FORCED INTERNAL RECIRCULATION OF FLUE GAS AND METHOD THEREOF

摘要

According to the present invention, a low NOx combustion device includes: a first fuel injection body supplying a main fuel into a combustion furnace; at least one or more second injection bodies arranged around the first fuel injection body, and arranged to enable a front end thereof to be inserted into the combustion furnace; a recirculation guidance unit enabling a combustion gas generated in the combustion furnace to be recirculated by a hydrodynamic force; a fuel supply unit supplying fuel to the first fuel injection body and the second fuel injection body; an oxidizing agent supply unit supplying an oxidizing agent to a space between the first fuel injection body and the second fuel injection body; and an air multi-stage sleeve arranged to surround the first fuel injection body for an air multi-stage. The oxidizing agent supplied from the oxidizing agent supply unit is supplied to the multi stages through an internal and an external air multi-stage sleeve. The present invention applies an inner recirculation technique to the combustion gas generated inside a combustion chamber, where a plurality of flames are formed, to enable the combustion gas to not to be transferred to an external connection passage of the combustion chamber, but to the inside of the combustion chamber without additional devices.