Spent catalyst stripper for fluidized catalytic cracking process

Claim 1

IN A APPARATUS OF THE CHARACTER DESCRIBED WHICH INCLUDES, IN COMBINATION, A VESSEL ADAPTED TO CONTAIN A FLUIDIZED BED OF SOLID PARTICLES AND FOR CONTACTING GASEOUS FLUID AND SAID SOLID PARTICLES, AND HAVING A TOP OUTLET FOR GASEOUS FLUID AND A BOTTOM OUTLET FOR SOLID PARTICLES, AN INVERTED CONICAL INLET MEMBER ARRANGED IN THE LOWER PART OF SAID VESSEL PROVIDED AT ITS UPPER END WITH A HORIZONTALLY EXTENDING PERFORATED PLATE, SAID CONICAL MEMBER AND PERFORATED PLATE BEING ARRANGED CENTRALLY OF SAID VESSEL AND SPACED FROM THE INNER WALL OF SAID VESSEL, A VERTICALLY ARRANGED ELONGATED ANNULAR SLEEVE MEMBER IN SEALED CONTACT WITH THE PERIPHERY OF SAID PERFORATED PLATE AND EXTENDING A DISTANCE ABOVE AND A DISTANCE BELOW SAID PERFORATED PLATE AND ARRANGED TO PROVIDE AN ANNULAR SPACE BETWEEN SAID INNER WALL OF SAID VESSEL AND SAID SLEEVE MEMBER, THE IMPROVEMENT WHICH COMPRISES A PLURALITY OF PERFORATED BAFFLE PLATES ARRANGED CIRCUMFERENTIALLY IN ROWS IN SAID ANNULAR SPACE, SAID BAFFLE PLATED BEING SPACED FROM ONE ANOTHER AND ATTACHED TO THE OUTER WALL OF SAID ANNULAR SLEEVE AND EXTENDING RADIALLY INTO SAID ANNULAR SPACE WITHOUT TOUCHING THE WALL OF SAID VESSEL, SAID BAFFLE PLATES COMPRISING EACH ROW BEING INCLINED AT AN ANGLE OF FROM 15 TO 75 DEGREES FROM THE VERTICAL AND IN THE OPPOSITE DIRECTION TO THAT OF THE BAFFLE PLATES OF THE PRECEDING ROW, EACH SAID BAFFLE PLATES BEING DISPOSED IN SPACE-APART VERTICAL OVERLAP RELATION WITH AT LEAST ONE BAFFLE PLATE IN AN ADJACENT CIRCUMFERENTIAL ROW, A PLURALITY OF INLETS FOR INTRODUCING STRIPPING FLUID INTO THE LOWER PORTION OF SAID ANNULAR SPACE WHEREBY SAID STRIPPING FLUID PASSES UPWARDLY THROUGH SAID ANNULAR SPACE CONTAINING SAID PERFORATED BAFFLE PLATES IN CONTACT WITH SOLID PARTICLES FLOWING DOWN THROUGH SAID SPACE BETWEEN THE INNER WALL OF SAID VESSEL AND SAID SLEEVE MEMBER FROM ABOVE SAID PERFORATED PLATE COUNTERCURRENT TO THE UPFLOWING STRIPPING FLUID TO STRIP THE SOLID PARTICLES OF ENTRAINED VOLATILE MATERIAL.