FIELD: thermal engineering; steam generation for turbines. SUBSTANCE: steam generator has two combustion chambers joined together first one burning coal and second one, biomass; it also has intercommunicating heat- transfer surfaces provided in each combustion chamber; first heat-transfer surface along coolant flow is mounted in second combustion chamber and second surface, in first chamber which makes it possible to use biomass as fuel eliminating high-temperature corrosion. EFFECT: enhanced efficiency of steam generator. 7 cl, 1 dwg
