Controlled flow, split stream burner assembly

Claim 1

A burner system for a furnace comprising a plurality of burner assemblies each comprising an inner tubular member, and an outer tubular member extending around said inner tubular member in a coaxial relation thereto to define an annular fuel passage, an inlet located at one end of said fuel passage and extending tangential to said passage for introducing fuel into said passage, an outlet located at the other end of said passage for discharging said fuel, a plurality of spaced blocks disposed in said fuel passage and extending flush with said outlet, one end of each of said blocks having a curved surface against which said fuel impinges, said curved surfaces directing said fuel into the spaces between said blocks and towards said outlet for splitting up the fuel discharging from said outlet so that upon ignition of said fuel, a plurality of flame patterns are formed; and a register assembly associated with each burner assembly, each register assembly comprising an enclosure extending around a corresponding burner assembly and having an inlet for receiving air from a windbox, means for directing said air from said inlet in a radial air path towards said burner assembly, means disposed downstream of said radial air path for defining two additional air paths communicating with said radial air path, at least a portion of each of said additional air paths extending parallel in a radially spaced relationship with said fuel passage, first register means disposed in said radial air path for imparting a swirl to said air as it passes through said radial air path and second register means disposed in one of said additional air paths, said first and second register means being adjustable to regulate said swirl, and a sleeve movable across said enclosure inlet to vary the size of said inlet and the quantity of air flow through said inlet to correct for variations in the quantity of air flow to each burner assembly caused by said regulation of said swirl, to balance the air flow to each burner assembly.