Gas turbine cycle or combined steam-gas cycle for production of power from solid fuels and waste heat

摘要

The power production process with a gas turbine, where solid fossil fuels, alternative fuels and wastes can be utilized for combustion with air or oxygen as the primary power source. The working medium is the steam-gas mixture of gas supplied by compressor (22) and the cooling medium vapors from the cooled combustion chamber (1), whereas the injected medium is injected into the gas supplied by means of compressor (22) before the compressor (22) or before the heater (7) of the steam-gas mixture or at least between some parts of the heater (7). The gas turbine (28) can be utilized in connection with a regeneration exchanger or with Rankine-Clausius steam cycle equipment utilizing waste heat of the flue gas from the gas turbine (28). The gas turbine (28) operates with the so-called wet steam cycle, which enables utilization of cooling medium heat from the combustion chamber (1), as well as isothermal compression during compression of gas creating the working medium of the gas turbine (28). Together with this gas, the cooling medium vapor from the combustion chamber (1) is used as the working medium. The temperature of the steam-gas mixture in front and behind the gas turbine (28) can be increased by reheating; the temperature of the steam-gas mixture behind the gas turbine (28) can be increased by reheating by the flue gas of the combusted primary fuel.