This invention discloses a co-firing
biomass gas burner and method, belonging to the technical field of
combustion equipment. The burner includes a central duct, an inner secondary duct, and an outer secondary duct, coaxially arranged from the inside out. A pulverized
coal concentrator is installed inside the central duct, and its outlet end has a slitted blunt body structure with a central through-hole and an axial slit, used to form a graded pulverized
coal gas flow. The
biomass gas pipeline is equipped with a mechanical
tar reduction
structure based on temperature detection and flow
rate regulation. Through the cooperation of the pulverized
coal concentrator, the slitted blunt body, the secondary air swirl blades, and the guide plate, a series of primary and secondary recirculation zones are formed within the burner, achieving zoned mixing and graded
combustion of pulverized coal and
biomass gas. This invention solves the technical problems of incomplete co-firing,
tar blockage, and low-
NOx combustion in existing technologies, improving combustion efficiency, stable combustion performance, and reducing
pollutant emissions.