Burner device

Claim 1

In an incinerator having a conical wall enclosing a combustion area for waste material adjacent the middle thereof and a combustion chamber above said combustion area, said wall having an outlet adjacent the upper end thereof for the hot gases to exit and having an aperture in the side thereof, a burner assembly comprising an inner assembly including first injector means having a rearward end and a forward end, said first injector means including a hollow housing at said rearward end defining a mixing chamber, said housing including variable air inlet means for selectively varying the amount of air introduced into said mixing chamber, an elongated venturi extending forwardly from said housing towards said forward end and having a venturi chamber communicated with said mixiNg chamber and orifice means in said mixing chamber directed towards said venturi chamber, nozzle means disposed on the forward end of said first injector means including an inner nozzle portion having an inner nozzle opening communicating with said venturi chamber, an outer nozzle portion having an outer nozzle opening larger in diameter than said inner nozzle opening and disposed forwardly thereof, and means defining a flame retention chamber generally surrounding said inner nozzle portion, and second injector means including an injector pipe having at least a portion thereof extending axially of said nozzle means and terminating at a distal end opening directed forwardly and along an extension of the axis of said nozzle means; and substantially tubular hood means surrounding a major portion of said inner assembly in spaced concentric relationship thereto with one end of said tubular hood means extending through said aperture into said combustion chamber and with the other end of said tubular hood means being outside of said conical wall whereby when there is less pressure in said combustion chamber than the pressure outside of said conical wall outside air is drawn in around said inner assembly in the form of an annular outer sleeve of air, gas supply means including a gas inlet pipe leading to said orifice means for supplying gas thereto for direction by said orifice means through said mixing chamber where air is mixed therewith and the gas-air mixture is projected through said venturi chamber, through said flame retention chamber where the ignition of said gas-air mixture is maintained, and out said nozzle means in the form of a flame extending forwardly of said nozzle means; fuel supply means including a fuel conduit leading to said injector pipe for supply fuel thereto for direction out said distal end opening of said injector pipe along the axis of the flame emanating for said nozzle means and with the annular outer sleeve of air causing the flame to be elongated outwardly from said burner assembly; and said burner assembly being directed towards said combustion area for the ignition of the waste material.