CONDENSED COMBUSTIBLES RECOVERY METHOD Russian patent published in 2000 - IPC

FIELD: recovery of combustible wastes. SUBSTANCE: method for recovering condensed combustibles, primarily those having high moisture content, such as solid domestic wastes, biomass wastes, mud and slime, coal by pyrolysis and gasification of organic component of wastes involves filling reactor with combustible charge which at least partially has combustible components and probably lumps of solid non-combustible material, passing gas flow through mentioned charge by feeding gasifying agent containing oxygen, steam, and carbon dioxide to reactor, and removing gaseous and liquid products of recovery in the form of producer gas from reactor wherein sequential sections of mentioned charge are sequentially held in heating, pyrolysis, coking, gasifying, and cooling zones; temperature within combustion zone is maintained between 800 and 1300 C; solid products of recovery are removed from reactor; at least part of producer gas is burned; novelty is that stack gas primarily that mixed up with air is used as gasifying agent; proportion of stack gas in gasifying agent is increased at combustion zone temperature higher than mentioned values and reduced when this temperature is lower than mentioned values. External heat is not required for recovery process. EFFECT: improved efficiency and yield of valuable products including pyrolysis resins and combustible gas. 4 cl, 1 dwg