DUAL MIXED REFRIGERANT CYCLE FOR GAS LIQUEFACTION.

摘要

PROCESS AND SYSTEM FOR LIQUEFYING A PRESSURIZED GAS (90), ESPECIALLY NATURAL GAS. THE PROCESS IS CARRIED OUT IN TWO HEAT EXCHANGERS (104, 122), AND COOLING FOR EACH HEAT EXCHANGER IS PROVIDED BY A MIXED REFRIGERANT WHICH IS VAPORIZED AT A SINGLE ESSENTIALLY , CONSTANT PRESSURE. FEED PRECOOLING, LOW LEVEL REFRIGERANT PRECOOLING, AND HIGH LEVEL LIQUID REFRIGERANT SUBCOOLING ARE EFFECTED IN ONE OF THE HEAT EXCHANGER AGAINST LOW LEVEL REFRIGERANT VAPORIZING AT A SINGLE ESSENTIALLY CONSTANT PRESSURE. THE PROCESS AND SYSTEM OF THE INVENTION ARE ESPECIALLY WELL-SUITED FOR INSTALLATION ON SHIPS, BARGES, AND OFFSHORE PLATFORMS.