Process and apparatus for heating solid inert heat-carrying bodies

Claim 1

A PROCESS FOR THE PRODUCTION OF OIL FROM CARBONACEOUS MATERIAL WHICH COMPRISES: HEATING AND SIMULTANEOUSLY GRINDING SAID CARBONACEOUS MATERIAL BY SOLID-TOSOLID MILLING CONTACT WITH HOTTER SOLID HEAT-CARRYING BODIES IN A HEATING AND GRINDING ZONE, TO PRODUCE OIL VAPROS AND GASES AND A FLUIDIZABLE COMBUSTIBLE RESIDUE OF SMALLER AVERAGE SIZE THAN SAID SOLID HEAT-CARRYING BODIES; TRANSFERING SAID FLUIODIZABLE COMBUSTIBLE RESIDUE TO A COMBUSTION ZONE; FLUIDIZING AND COMBUSTING SAID COMBUSTIBLE RESIDUE IN SAID COMBUSTION ZONE BY MEANS OF A FLUIDIZING COMBUSTION-SUPPORTING GAS; TRANSFERRING SAID HEAT-CARRYING BODIES TO A REHEATING ZONE TO FORM THEREIN A PLURALITY OF VERTICALLY SPACED SHALLOW BEDS OF HEAT-CARRYING BODIES; BLOWING THE COMBUSTION GAS THROUGH SAID BEDS OF HEAT-CARRYING BODIES TO FLUIDIZE THEM AND REHEAT THEM; MOVING SAID HEAT-CARRYING BODIES SUCCESSIVELY DOWNWARDLY FROM BED TO BED IN SAID REHEATING ZONE; WITHDRAWING SAID HEAT-CARRYING BODIES FROM A LOWER BED OF SAID REHEATING ZONE AND TRANSFERING THEM BACK TO SAID HEATING GRINDING ZONE TO HEAT AND GRIND ADDITIONAL CARBONACEOUS MATERIAL.