FURNACE FOR COMBUSTING WOOD WASTE MATERIALS Russian patent published in 2003 - IPC

FIELD: furnaces and burners for combusting wood wastes. SUBSTANCE: furnace has combustion chamber in which intervals between tubes of front inclined wall are provided with spacers having gaps for passing primary air. Additional restriction zone is arranged in lower part of combustion chamber and it has two horizontal water cooled tubes with cross vertical connections made of small-diameter tubes. Afterburning chamber is provided with nozzles for supplying ternary air. Said nozzles are arranged at level of upper manifold of clamping grid over nozzles for supplying secondary air. Lengthwise axes of walls are laid in the same vertical planes shifted by pitch half relative to nozzles of opposite walls. Nozzles for supplying ternary air are inclined downwards by angle relative to vertical plane equal to ϕ...(ϕ+5^°), slope of back wall is inclined by angle ψ = 30...35^° relative to vertical plane. EFFECT: effective combustion of highly humidified wood waste, wide range of changing composition of fuel mixture, possibly combusting only saw dust, lowered exhaust of nitrogen oxides, of carbon monoxide. 3 dwg