Patent ID: 6213033
Filing Date: 2001-04-10
Classification: F23G

Abstract:
A method for treating waste material containing hydrocarbons and solid incombustibles, comprisingsupplying the waste material in a reactor;supplying gas containing oxygen continuously to the reactor in amounts insufficient for complete oxidation of the waste material;combusting the waste material and gas containing oxygen to form gaseous combustion products and solid residue;discharging the solid residue from the reactor;withdrawing the gaseous combustion products so as to form a zone of untreated waste material, a zone of solid residue and a zone of combustion with the zone of combustion between the zones of untreated waste material and of solid residue;wherein the solid incombustibles comprise substantially solid pieces having a mesh size in excess of 20 mm, the gas containing oxygen is supplied to the reactor countercurrently with the supply of waste material so that the gas containing oxygen flows through the zone of solid residue, the zone of combustion and then the zone of untreated waste material to form a product gas containing hydrocarbons and droplets of liquid hydrocarbons, the solid residue being substantially cooled by the gas flow of the gas containing oxygen prior to discharging the residue from the reactor.