Gas cooling device for a gasifer

A gasification reactor including a tubular first pipe wall structure enclosing a reaction space wherein a hot producer gas is generated at an increased pressure by reaction between a pulverized fuel and oxygen, said first pipe wall structure having a constricted end portion forming a circular gas discharge opening, a gas outlet connection piece including a tubular second pipe wall structure coaxially arranged above said gas discharge opening and having an inner diameter which exceeds an inner diameter of said discharge opening, and a sealing means connecting a lower end of said second pipe wall structure to a rim of said constricted end portion of the first pipe wall structure, means for circulating a cooling medium through pipes of the respective pipe wall structures, a device for cooling a stream of hot producer gas exiting through gas discharge opening comprising a plurality of water feeding conduits having ends projecting through said sealing means, each of said ends of the water feeding conduits being provided with a water spraying nozzle directed downwardly against the exiting stream of producer gas, said nozzles being located around a center axis of said second pipe wall structure in a region determined by a circle whose diameter is larger than said inner diameter of the gas discharge opening but smaller than said inner diameter of the second pipe wall structure.