Patent ID: 8882867

Claim:
A gasification reactor for producing crude gas containing CO or H 2 by gasification of ash-containing fuel with oxygen-containing gas, at temperatures above the melting temperature of the ash, said gasification reactor comprising: (a) a pressure container; (b) a membrane wall forming a reaction chamber and disposed within the pressure container, wherein cooling medium flows through the membrane wall; (c) a transition area beneath the reaction chamber and disposed within the pressure container; (d) a quench chamber beneath the transition area, disposed within the pressure container, and comprising a quench chamber wall, a water-film forming device, and a double-walled cylinder, wherein said double-walled cylinder forms at least a part of the quench chamber wall, has a coolant overflow for additionally wetting an inner surface of the quench chamber wall, has a closed bottom, has a bottom area, has a tangential coolant supply in the bottom area, and forms an annular overflow chamber; (e) nozzles disposed in the quench chamber wall to spray coolant medium; and (f) a slag collection container beneath the quench chamber and disposed within the pressure container; wherein the walls of the double-walled cylinder are separate from an exterior wall of the pressure container; and wherein said annular overflow chamber covers at least one-fourth of an axial length of the quench chamber wall.