Quench-elutriator vessel

Claim 1

IN A HYDROCARBON OIL FLUID COKING SYSTEM WHEREIN OILS ARE PYROLYTICALLY UPGRADED BY CONTACT WITH HIGH TEMPERATURE PARTICULATE COKE IN A COKING VESSEL, WHEREIN PARTICULATE COKE IS CIRCULATED FROM SAID COKING VESSEL TO A COMBUSTION VESSEL ADAPTED TO CONTAIN A FLUIDIZED BED OF PARTICULATE COKE AND BACK TO SUPPLY HEAT FOR THE PYROLYSIS, AND WHEREIN HYDROCARBON VAPORS AND COKE ARE WITHDRAWN FROM SAID SYSTEM AS PRODUCT, THE IMPROVEMENT FOR THE ELUTRIATING OF COKE FINES FROM AND THE QUENCHING OF SAID COKE REMOVED AS PRODUCT COMPRISING A VERTICALLY DISPOSED CIRCULAR CONDUIT HAVING AN ENLARGED LOWER PORTION ADAPTED TO CONTAIN A BED OF FLUIDIZED PARTICULATE SOLIDS, AN UPPER PORTION OF LESSER CROSS-SECTIONAL AREA THAN SAID LOWER PORTION AND A FRUSTOCONICAL PORTION INTERMEDIATE BETWEEN SAID UPPER AND LOWER PORTION, CONDUIT MEANS FOR WITHDRAWING COKE FROM SAID SYSTEM AND INTRODUCING SAID COKE INTO SAID UPPER LOWER PORTIONS, CONDUIT MEANS FOR INTRODUCING WATER INTO SAID LOWER PORTION, CONDUIT MEANS FOR WITHDRAWING VAPORS AND COKE FINES FROM SAID UPPER PORTION AND CONDUIT MEANS FOR REMOVING PARTICULATE SOLIDS FROM SAID LOWER PORTION.