Method of burning waste liquors

Claim 1

IN A VERTICALLY DISPOSED CHEMICAL RECOVERY FURNACE WITHIN WHICH THE COMBUSTIBLES IN THE RESIDUAL LIQUOR OBTAINED IN THE CHEMICAL DIGESTION PROCESS OF CELLULOSE BEARING MATERIAL IN THE MANUFACTURE OF PAPER IS BURNED, WITH THE WALLS OF THE FURNACE BEING COVERED WITH DOWNWARDLY FLOWING MOLTEN CHEMICAL FOR A PREDETERMINED DISTANCE ABOVE THE BOTTOM OF THE FURNACE AND WITH THE CHEMICALS IN THE LIQUOR BEING COLLECTED IS THE BOTTOM OF THE FURNACE AND THE COMBUSTION GASES PASSONG UPWARDLY THROUGH AND OUT OF THE FURNACE, THE IMPROVEMENT COMPRISING THE STEPS OF SPRAYING THE LIQUOR INTO THE FURNACE AT A GIVEN LOCATION INTERMEDIATE THE BOTTOM OF THE FURNACE AND THE UPPER LIMIT OF THE COATING OF MOLTEN CHEMICAL ON THE FURNACE WALLS WITH MOST OF THE LIQUOR REMAINING FREE OF CONTACT OF THE FURNACE WALLS AND DESCENDING TOWARD THE FURNACE BOTTOM, INTRODUCING THE PRIMARY AIR FOR SUPPORTING COMBUSTION INTO THE FURNACE ADJACENT THE BOTTOM THEREOF AND IN A DIRECTION GENERALLY UPON LIQUOR SOLIDS COLLECTED ON THE BOTTOM, DRYING A MAJOR PORTION OF THE LIQUOR, BURNING THE COMBUSTIBLES AND SMELTING THE CHEMICALS IN SAID MAJOR PORTION IN THE FURNACE BELOW SAID GIVEN LOCATION WITH MINOR AMOUNTS OF SOLIDS BEING ENTRAINED IN THE UPWARDLY MOVING GAS STREAM, INTRODUCING ADDITIONAL AIR FOR SUPPORTION COMBUSTION INTO THE FURNACE ABOVE SAID GIVEN LOCATION BUT BELOW THE UPPER LIMIT OF THE COATING OF MOLTEN CHEMICAL ON THE FURNACE WALLS, SAID ADDITIONAL AIR BEING INTRODUCED THROUGH THE FURNACE WALLS IN STREAM THAT ARE SPACED ABOUT THE PRIPHERY OF THE FURNACE AND ARE DIRECTED IN SUCH A MANNER AS TO CREATE A WHIRLING MASS OF GAS GENERALLY AT SAID LOCATION ROTATING ABOUT A GENERALLY VERTICAL AXIS AND DISPOSED SO THE UPWARDLY RISING GASES THEREBELOW MUST PASS THERETHROUGH AND THE SOLIDS ENTRAINED THEREIN WILL INTIMATELY CONTACT SAID MASS OF GAS, SUBJECTING THE GASES RISING UPWARDLY THROUGH THE FURNACE TOGETHER WITH THE MATERIAL ENTRAINED THEREIN TO THIS WHIR ING GAS MASS, BURNING A PORTION OF THE COMBUSTIBLES IN SAID MATERIAL UPON CONTACT WITH THIS MASS, IMPARTING A WHIRLING MOTION TO THE MATERIAL UPON BEING SUBJECTED TO THIS WHIRLING MASS OF GAS AND DEPOSITING THROUGH THE ENTRIFUGAL FORCE THUS DEVELOPED A PORTION THEREOF INTO THE MOLTEN CHEMICALS FLOWING DOWN THE FURNACE WALLS AND REMOVING SMELTED CHEMICALS FROM THE LOWER END OF THE FURNACE.