Generation of heating gas from solid fuels

Claim 1

A PROCESS FOR THE GASIFICATION OF A SOLID CARBONACEOUS MATERIAL CONTAINING VOLATILIZABLE CONSTITUENTS WHICH COMPRISES MAINTAINING A DENSE PHASE FLUIDIZED BED OF PARTICLES OF SAID SOLID CARBONACEOUS MATERIAL IN A DISTILLATION ZONE WHEREIN SAID VOLATILIZABLE CONSTITUENTS ARE DISTILLED THEREFROM, DISPOSING SAID DISTILLATION ZONE DIRECTLY ABOVE A GASIFICATION ZONE AND IN DIRECT COMMUNICATION THEREWITH THROUGH AN INTERMEDIATE ZONE OF RESTRICTED CROSS-SECTIONAL AREA PERMITTING FREE FLOW OF PARTICLES OF SOLID CARBONACEOUS MATERIAL FROM THE LOWER PORTION OF SAID FLUIDIZED BED INTO THE UPPER PORTION OF SAID GASIFICATION ZONE AND FREE FLOW OF GAS FROM SAID GASIFICATION ZONE TO SAID DISTILLATION ZONE, INTRODUCING OXYGEN-CONTAINING GAS INTO SAID GASIFICATION ZONE INTO CONTACT WITH CARBONACEOUS PARTICLES FROM SAID DISTILLATION ZONE EFFECTING REACTION WITH SAID CARBONACEOUS PARTICLES IN SAID GASIFICATION ZONE, PASSING GASEOUS REACTION PRODUCT FROM THE UPPER PORTION OF SAID GASIFICATION ZONE INTO THE LOWER PORTION OF SAID DISTILLATION ZONE THROUGH SAID INTERMEDIATE ZONE COUNTERCURRENT TO THE FLOW OF SAID PARTICLES ENTERING THE GASIFICATION ZONE AT A VELOCITY SUCH THAT SAID PARTICLES ARE ADMITTED INTO SAID GASIFICATION ZONE AT A LIMITED RATE, AND WITHDRAWING ADDITIONAL GASEOUS REACTION PRODUCT FROM THE LOWER PORTION OF SAID GASIFICATION ZONE.