Gasification apparatus for a finely divided combustible material

Claim 1

Gasification apparatus for gasification of a finely divided combustible material under pressure to make a product gas in a single operation, the gasification apparatus comprising a gasification reactor having an outlet section from which a crude gas issues during a gasification of the finely divided combustible material; a quenching pipe positioned above the gasification reactor for receiving the crude gas issuing from the gasification reactor and for guiding a gas flow including the crude gas, the quenching pipe having an inlet section for receiving the crude gas; a convection-heated boiler including a boiler housing and convection-heated surface elements for receiving heat transferred from the gas flow, the convection-heated surface elements being supported by the quenching pipe and the boiler housing and the convection-heated surface elements and the boiler housing surrounding the quenching pipe; a pressurized vessel containing the gasification reactor, the quenching pipe and the convection-heated boiler, the pressurized vessel surrounding concentrically the quenching pipe and the gasification reactor being supported at anchoring points in a lower portion of the pressurized vessel so as to be coaxial to the quenching pipe; gas flow guide means for conducting said gas flow into the convection-heated boiler from the quenching pipe, the gas flow guide means being accommodated in a portion of the boiler housing extending above the quenching pipe and the gas flow guide means connecting said quenching pipe and said convection-heated boiler so that the gas flow is conducted through the convection-heated boiler from the quenching pipe by the gas flow guide means; a gas outlet device located between the gasification reactor and the convection-heated boiler, through which the gas flow is conducted from said boiler housing and from said pressurized vessel; load bearing members above the gas outlet device on which the quenching pipe and the boiler housing are supported, the load bearing members being provided with gas conducting openings and being supported at other anchoring points on the pressurized vessel; and quenching gas guide means for conducting a quenching gas into said quenching pipe to form the gas flow including the crude gas and the quenching gas, the quenching gas guide means including a circumferential quenching gas inlet gap between the outlet section of the gasification reactor and the inlet section of the quenching pipe dimensioned to provide a circumferential thermal expansion compensating gap, so that a portion of the quenching pipe under the load bearing members and a portion of the gasification reactor above the anchoring points of the gasification reactor can have different thermal expansion properties.