Boiler apparatus for complete combustion of fuel

Claim 1

IN A STEAM-GENERATING BOILER UTILIZING WOOD WASTE MATERIAL FUEL, THE APPARATUS FOR OBTAINING COMPLETE COMBUSTION OF THE WOOD WASTE FUEL COMPRISING LOWER WALL MEANS, UPPER WALL MEANS, AND INTERMEDIATE WALL MEANS DEFINING RESPECTIVELY A LOWER CHAMBER, AN UPPER CHAMBER, AND A SUBSTANTIALLY SHORT, NARROW THROAT PASSAGEWAY INTERCONNECTING SAID LOWER AND SAID UPPER CHAMBERS; GRATE STRUCTURE ARRANGED ACROSS THE BOTTOM OF SAID LOWER CHAMBER FOR RECEIVING SAID WOOD WASTE FUEL; SAID LOWER WALL MEANS INCLUDING VERTICALLY DIRECTED SIDE WALL MEANS AND SUBSTANTIALLY HORIZONTALLY DIRECTED TOP WALL MEANS DEFINING SUBSTANTIALLY THE SIDE AND TOP BOUNDS OF SAID LOWER CHAMBER; THE INTERSPATIAL HORIZONTAL EXTENSION OF SAID LOWER CHAMBER BEING SUBSTANTIALLY GREATER THAN THE INTERSPATIAL VERTICAL EXTENSION OF SAID LOWER CHAMBER; PRIMARY AIR SUPPLY MEANS INCLUDING CONDUIT MEANS FOR DIRECTING AN UPWARD FLOW OF AIR THROUGH SAID GRATE STRUCTURE AND FOR COMBUSTION OF SAID WASTE FUEL MATERIAL; SECONDARY AIR SUPPLY MEANS INCLUDING CONDUIT MEANS HAVING A PLURALITY OF DOWNWARDLY DIRECTED AIR OUTLETS DISPOSED RESPECTIVELY ALONG THE UNDERSIDE OF SAID TOP WALL MEANS FOR CAUSING A PLURALITY OF DOWNWARDLY DIRECTED CURRENTS OF AIR; WATERBEARING TUBE MEANS ARRANGED ALONG THE UNDERSIDE OF SAID TOP WALL MEANS FOR ABSORBING HEAT FROM SAID WASTE FUEL MATERIAL AND FOR GENERATING STEAM; AND AUXILIARY COMBUSTION MEANS INCLUDING FUEL BURNER MEANS ARRANGED SUBSTANTIALLY DIRECTLY ABOVE SAID THROAT PASSAGEWAY AND DISPOSED IN THE LOWER PORTION OF SAID UPPER CHAMBER FOR BURNING A HIGH-ENERGY FUEL OTHER THAN THE WOOD WASTE MATERIAL FUEL AND FOR FURTHER COMBUSTION OF SAID WASTE FUEL MATERIAL.