Apparatus and method for compound cyclone combustion of coal and other fuels

Claim 1

IN A FUEL BURNING SYSTEM BURNING SOLID COMMINUTED FUEL, THE COMBINATION OF A SUBSTANTIALY CYLINDRICAL CYLONIC FURNACE CHAMBER HAVING AN OPENING FOR DISCHARGEING FUEL RESIDUE IN MOLTEN STATE AND ANOTHER OPENING FOR DISCHARGING COMBUSTION GASES GENERATED IN SAID FURNACE, A FIRST SOURCE OF COARSE COMMINUTED (GRANULAR) SOLID FUEL, A SECOND FUEL SOURCE OF FINELY COMMINUTED (PULVERIZED) SOLID FUEL, FIRST REGULATEABLE CONDUIT MEANS FOR ADMITTING A STREAM OF COMBUSTION AIR INTO SAID FURNACE CHAMBER IN A SUBSTANTIALLY TANGENTIAL DIRECTION TO THE INNER SURFACE OF SAID FURNACE FOR FORMING A VIOLENT VORTEX FLOW THEREIN, FIRST REGULATABLE PIPE MEANS FOR ADMITTING A STREAM OF GRANULAR FUEL FROM THE SAID FIRST FUEL SOURCE INTO SAID FURNACE IN SUBSTANTIALLY TANGENTIAL DIRECTION OF THE VORTEX FACE OF SAID FURNACE AND IN THE DIRECTION OF THE VORTEX FLOW IN SUCH MANNER THAT THE STREAM OF GRANULAR FUEL PENETRATES INTO SAID VORTEX STREAM OF COMBUSTION AIR, REGULATABLE PULVERIZED FUEL BURNER MEANS, SECOND PIPE MEANS FOR ADMITTING A REGULATABLE STREAM OF PULVERIZED FUEL FROM THE SAID SECOND FUEL SOURCE TO SAID BURNER MEANS, SECOND CONDUIT MEANS FOR REGULATABLY BRANCHING OFF COMBUSTION AIR FROM SAID FIRST CONDUIT MEANS INTO SAID PULVERIZED FUEL BURNER WHEREIN SAID BRANCHED OFF AIR SERVES AS COMBUSTION AIR, THIRD CONDUIT MEANS FOR LEADING THE HOT COMBUSTION GASES GENERATED IN SAID BURNER MEANS INTO SAID FIRST CONDUIT MEANS FOR MIXING WITH THE AIR STREAM THEREIN, THEREBY FORMING A HOT AIR-GAS MIXTURE OUTSIDE THE FURNACE PROPER ON ITS WAY INTO THE FURNACE, SAID HOT MIXTURE SERVING AS COMBUSTION SUPPORTING MEDIUM OF REGULATABLE TEMPERATURE FOR THE GRANULAR FUEL ISSUING FROM THE SAID FIRST PIPE MEANS.