CONTACT-TYPE STEAM-GAS PLANT Russian patent published in 2005 - IPC

FIELD: heat power engineering.

SUBSTANCE: invention can be used in contact-type steam-gas plants containing gas-turbine plants with injection of steam. Proposed contact-type steam-gas plant contains gas-turbine plant with compressor, combustion chamber and main gas turbine, recovery boiler with two-pressure steam circuits communicating at steam outlets by steam pipelines and with inlets of gas-turbine plant by high-pressure and low-pressure steam lines, respectively, and at inlet of heating carrier (gas), with gas outlet of gas-turbine plant. Contact-type steam-gas plant contains also gas cooler-condenser connected by condensate outlet through pumps and with condensate inlet of recovery boiler. To reduced gas pressure at exhaust of gas turbine, contact-type steam-gas plant is furnished with topping-up compressor communicating by compressed gas inlet with gas outlet of gas cooler-condenser, by gas outlet with surrounding medium, and overexpansion gas turbine communicating by gas inlet with gas outlet of recovery boiler and by gas outlet, with gas inlet of gas-cooler-condenser. Rotor of overexpansion gas turbine is coupled (for instance, is installed) on one shaft with rotors of gas-turbine plant and/or topping-up compressor.

EFFECT: increased efficiency of contact-type steam-gas plant owing to reduction of gas turbine exhaust gas pressure without consumption of useful power of plant.

1 dwg