A method and apparatus in order to achieve a high efficiency in an open gas turbines (combined) process

摘要

A method and apparatus in order to achieve a high efficiency in an open gas turbine process, in which a compressor (1), the required for combustion air under pressure, which, in the first combustion chamber (2) with fuel is burnt, which a first turbine (3), a second combustion chamber (4), a second turbine (5) and a preheating heat exchanger (7) are disposed, in which the water vapor is a primary intermediate bleed from the secondary process or a mixture of said water vapor and of from the compressor (1) in the incoming air to be preheated. From the heat exchanger (7), the combustion gases flow into the waste heat boiler (12a, b), in the feed water of the secondary process is evaporated. The combustion gases expand in the second turbine (5) to a pressure, which falls below the atmospheric pressure of about 0.5 bar, whereby after the precooler (13) and after condensation and removal of the water vapor of the pressure of the remaining combustion gases with the combustion gas compressor (6) is adapted to the surrounding air pressure. According to the low-pressure turbine, the water vapor in the capacitor (10), which condenses to water by means of a pump (11) to a maximum pressure, and in the preheated waste heat boiler (12a, b) is vaporized. According to the waste heat boiler (12a, b) flows the water vapor in the combined high-pressure / medium-pressure turbine (14a, b), from which a primary intermediate bleed of the secondary process is removed, which, after the preheating heat exchanger (7) behind the compressor and / or at the latest at the beginning of the blades of the first turbine (3) is injected into the gas turbine process.