Patent ID: 7967880

Claim:
A fixed-bed gasifier ( 1 ) comprising a reaction chamber ( 2 ) for the accommodation of a batch ( 21 ) of solid fuel as well as of resultant pyrolysis coke and of resultant ash, the reaction chamber ( 2 ) having a top, the reaction chamber ( 2 ) comprises a gas-tight lining ( 8 ), an external jacket ( 9 ) surrounds gas-tight lining ( 8 ), the gas-tight lining ( 8 ) and the external jacket ( 9 ) having an intermediate space ( 10 ) therebetween, including an auxiliary heating device ( 11 ) housed within the intermediate space ( 10 ) and in operable arrangement with the reaction chamber ( 2 ), a fuel filling device ( 14 ) operatively positioned proximate the top of the reaction chamber ( 2 ), the fuel filling device ( 14 ) for filling the reaction chamber ( 2 ) with solid fuel from the top of the reaction chamber ( 2 ), an ash withdrawal device ( 26 ) for withdrawing ash in downward direction, a heating chamber ( 3 ) comprising an integral radiant heating device ( 29 ) for generating thermal radiation, the heating chamber ( 3 ) in thermal communication, via a heating aperture ( 4 ), with the reaction chamber ( 2 ) for heating by thermal radiation reaction chamber ( 2 ), the heating chamber ( 3 ) is positioned above the top of the reaction chamber ( 2 ); and, a gas exhaust device ( 37 ) for discharging resultant gaseous reaction products.