(WO9714767-A1)      Appts. for waste gasification, consists of (A) a cylindrical first combustion chamber, comprising (a) means for feeding waste material into the first combustion chamber; (b) a rotatable tuyere supporting an annular column of waste material, the tuyere having a base portion and a central column extending from the base towards the waste material feeder, in which the central column in combination with an interior first combustion chamber wall define an annular region for the column of waste material; (c) an ash collection region for collecting ash removed from the column of waste material; (d) several angled vanes attached to the tuyere base for facilitating removal of ash formed within the annular column of waste material into the ash collection region; and (e) means for introducing an oxidiser into the first combustion chamber to react with the waste material so as to maintain a temp. within the chamber of 600-2100 deg.F; and further (B) means for removing ash from the ash collection region; and (C) means for withdrawing combustion gases from the first combustion chamber and feeding the gases to a second combustion chamber, the second combustion chamber comprising (i) a restricting orifice having an opening that is smaller in cross-sectional area than that of the second combustion chamber such that the combustion gases moving through the second combustion chamber pass through the restricting orifice; (ii) a target provided downstream of the orifice, in which the target has an impingement surface that faces the orifice, the surface having a larger surface area than that of the orifice so that combustion gases passing through the orifice impinge against the impingement surface of the target; and (iii) means for introducing an oxidiser into the second combustion chamber adjacent the target; and finally (C) means for withdrawing a relatively clean producer gas from the second combustion chamber.    ADVANTAGE -   The thermo-gasification appts. is capable of gasifying conventional solid gasification fuels such as coal and wood, whilst eliminating emission of smoke and other pollutants to the atmos.