Method of transferring solids

Claim 1

IN A SYSTEM COMPRISING A PAIR OF CHAMBERS CONTAINING BEDS OF FINELY DIVIDED FLUIDIZED SOLIDS, THE GAS PRESSURE IN ONE OF THE SAID CHAMBERS BEING LOWER THAN THE GAS PRESSURE IN THE OTHER OF SAID CHAMBERS, AND THE GAS PRESSURE DIFFERENTIAL BETWEEN THE SAID TWO CHAMBERS BEING SUBJECT TO FLUCTUATION, THE METHOD OF TRANSFERRING SOLIDS FROM THE SAID CHAMBER OF LOWER GAS PRESSURE TO THE OTHER OF SAID CHAMBERS, COMPRISING OVERFLOWING SOLIDS FROM THE SURFACE OF THE FLUIDIZED BED OF SOLIDS IN THE SAID CHAMBER OF LOWER GAS PRESSURE INTO A DOWNWARDLY DIRECTED CONDUIT HAVING AN OUTLET IMMERSED IN A FLUIDIZED BED OF SOLIDS IN THE SAID CHAMBER OF HIGHER GAS PRESSURE, CONDUCTING THE OVERFLOWED SOLIDS INTO THE LATTER BED THROUGH THE SAID CONDUIT, AND OVERFLOWING SOLIDS FROM THE LATTER FLUIDIZED BED INTO A SECOND FLUIDIZED BED IN THE SAID CHAMBER OF HIGHER GAS PRESSURE, THE SAID TWO FLUIDIZED BEDS OF SOLIDS IN THE SAID CHAMBER OF HIGHER GAS PRESSURE BEING FLUIDIZED RESPECTIVELY BY SEPARATE GAS STREAMS, A PORTION OF THE SAID BED IN WHICH SAID OUTLET IS IMMERSED EXTENDING UPWARD INTO THE SAID CONDUIT AND FORMING THEREIN A COLUMN OF FLUIDIZED SOLIDS OF SUFFICIENT HEIGHT TO BALANCE THE PRESSURE DROP BETWEEN THE SAID CHAMBERS, AND THERE BEING SUFFICIENT FLUIDIZED SOLIDS OF THAT SAME BED ABOVE THE SAID OUTLET AND OUTSIDE OF THE SAID CONDUIT FOR THE MAXIMUM INCREASE WHICH OCCURS IN PRESSURE DROP BETWEEN THE TWO CHAMBERS DURING OPERATION OF THE SYSTEM TO BE BALANCED BY A RISE OF FLUIDIZED SOLIDS OF THAT BED IN THE CONDUIT.