COMPRESSOR STATION OF THE MAIN GAS PIPELINE WITH A GAS TURBO EXPANDER UNIT Russian patent published in 2023 - IPC F04D25/02 F17D1/04 

FIELD: gas transfer via trunk gas pipelines.

SUBSTANCE: invention relates to the field of gas transfer via trunk gas pipelines and can be used when creating the trunk gas pipelines compressor stations. A main gas pipeline compressor station with a gas turbine expander unit contains a main gas pipeline, gas turbine gas compressor units with blowers and air coolers, a high pressure fuel gas pipeline with a separator, a high pressure fuel gas heater, a gas turbine expander, a regulator, an electric generator, a medium pressure fuel gas pipeline, a medium pressure fuel gas heat exchanger, direct and return lines for the hot gas, a gas pipeline under a hot water line, and a gas pipeline for the cooling system. Applying additional coolant heat exchanger, a coolant direct pipeline and a coolant return pipeline with a pump in the unit allows to increase the gas cooler reliability.

EFFECT: consecutive introduction of a medium-pressure fuel gas preheater and a high-pressure fuel gas preheater in the hot coolant direct pipeline allows to increase the efficiency of exhaust gas heat utilization by means of the gas turbine and increase the temperature of fuel gas supplied to the GPU combustion chambers up to 200-250°C.

1 cl, 1 dwg