(WO9708492-A1)      The steam generator (1) has an initial combustion chamber (24) to produce an operating medium (A) through the combustion of one fuel (K). It is followed by a second combustion chamber (26) using a second fuel (S). The first fuel (K) is pit coal for the first combustion chamber (24) and/or the fuel (S) for the second combustion chamber is a biomass, and especially straw. The operating medium (A) from the first combustion chamber (24) is used as combustion air for the second combustion chamber (26).    USE/ADVANTAGE -   Generator is for prodn. of steam for power system, such as turbine to generate electricity and like. System uses biomass fuel with high effectiveness, to reduce use of fossil fuels and cut hazardous exhaust emissions.    (EP846242-A1)      The steam generator (1) has an initial combustion chamber (24) to produce an operating medium (A) through the combustion of one fuel (K). It is followed by a second combustion chamber (26) using a second fuel (S). The first fuel (K) is pit coal for the first combustion chamber (24) and/or the fuel (S) for the second combustion chamber is a biomass, and especially straw. The operating medium (A) from the first combustion chamber (24) is used as combustion air for the second combustion chamber (26).    USE/ADVANTAGE -   Generator is for prodn. of steam for power system, such as turbine to generate electricity and like. System uses biomass fuel with high effectiveness, to reduce use of fossil fuels and cut hazardous exhaust emissions.    (JP11511236-W)      The steam generator (1) has an initial combustion chamber (24) to produce an operating medium (A) through the combustion of one fuel (K). It is followed by a second combustion chamber (26) using a second fuel (S). The first fuel (K) is pit coal for the first combustion chamber (24) and/or the fuel (S) for the second combustion chamber is a biomass, and especially straw. The operating medium (A) from the first combustion chamber (24) is used as combustion air for the second combustion chamber (26).    USE/ADVANTAGE -   Generator is for prodn. of steam for power system, such as turbine to generate electricity and like. System uses biomass fuel with high effectiveness, to reduce use of fossil fuels and cut hazardous exhaust emissions.    (US6021743-A)      The steam generator (1) has an initial combustion chamber (24) to produce an operating medium (A) through the combustion of one fuel (K). It is followed by a second combustion chamber (26) using a second fuel (S). The first fuel (K) is pit coal for the first combustion chamber (24) and/or the fuel (S) for the second combustion chamber is a biomass, and especially straw. The operating medium (A) from the first combustion chamber (24) is used as combustion air for the second combustion chamber (26).    USE/ADVANTAGE -   Generator is for prodn. of steam for power system, such as turbine to generate electricity and like. System uses biomass fuel with high effectiveness, to reduce use of fossil fuels and cut hazardous exhaust emissions.    (EP846242-B1)      The steam generator (1) has an initial combustion chamber (24) to produce an operating medium (A) through the combustion of one fuel (K). It is followed by a second combustion chamber (26) using a second fuel (S). The first fuel (K) is pit coal for the first combustion chamber (24) and/or the fuel (S) for the second combustion chamber is a biomass, and especially straw. The operating medium (A) from the first combustion chamber (24) is used as combustion air for the second combustion chamber (26).    USE/ADVANTAGE -   Generator is for prodn. of steam for power system, such as turbine to generate electricity and like. System uses biomass fuel with high effectiveness, to reduce use of fossil fuels and cut hazardous exhaust emissions.