Plant for treating gas, particularly natural gas, supplied by a transmission network

A plant for treating gas, particularly natural gas, supplied by a transmission network, comprising:

• a gas inlet connectable to said transmission network;
• a first plant portion configured to decompress to a predefined outlet pressure a first fraction of the gas from the inlet and to supply the decompressed gas at a first outlet;
• a second plant portion configured to liquefy a second fraction of the gas from the inlet and to supply the liquefied gas at a second outlet,
• wherein the first plant portion comprises:
• a valve for throttling the first gas fraction;
• a first heat exchanger establishing a thermal exchange relationship between the segment of the first plant portion placed downstream the throttle valve and the second plant portion;
• a second heat exchanger establishing a thermal exchange relationship between the segment of the first plant portion placed downstream the first heat exchanger and the segment of the first plant portion placed upstream the throttle valve, and
• wherein the second plant portion comprises:
• a valve for throttling the second gas fraction downstream the first heat exchanger;
• a section for recirculating a non-liquefied part of the second gas fraction exiting the throttle valve, said recirculation section comprising a condensate separator configured to separate a liquefied part and a non-liquefied part of the second gas fraction exiting the throttle valve of the second plant portion and to convey the liquefied part to the second outlet and the non-liquefied part to the first outlet,
• wherein said recirculation section comprises another heat exchanger establishing a thermal exchange relationship between the segment transporting the non-liquefied part of the second gas fraction downstream the condensate separator and the segment of the first plant portion upstream the throttle valve of the first plant portion.