Method of natural gas pressure reduction on the city gate stations

摘要

A method of natural gas pressure reduction at a City Gate station providing an elimination of the station's energy consumption for gas flow heating together with the creation of a cooling duty for further utilization which comprises connecting a vortex tube inlet with a gas flow line for applying the whole gas flow entering the City Gate, connecting a cold fraction gas flow outlet from the vortex tube with a heat exchanger for warming the cold fraction gas, and outletting the warmed cold fraction gas, connecting a vortex tube's hot fraction outlet with the warmed cold fraction outlet from the heat exchanger, to combine the hot fraction outlet with the warmed cold fraction outlet; and connecting the combined hot fraction and warmed cold fraction to the pipeline leaving the station, the method of the invention is also useful in connection with natural gas pressure reduction at a City Gate station equipped with a heater and a JT valve providing a reduction of energy consumption for gas flow heating, together with creation of a cooling duty for further utilization.