Natural gas liquefaction ethylene refrigerating system

The utility model relates to a gas treatment technical field discloses a natural gas liquefaction ethylene refrigerating system, including ethylene compressor, ethylene water condenser, first propylene evaporimeter, second propylene evaporimeter, third propylene evaporimeter, fourth propylene evaporimeter and the ethylene lime set collection tank that connects gradually, connect the first ethylene evaporation absorptive unit between ethylene lime set collection tank and ethylene compressor's tertiary entry, connect the second ethylene evaporation absorptive unit between first ethylene evaporation absorptive unit and ethylene compressor's second grade entry to and the third ethylene of connecting between second ethylene evaporation absorptive unit and ethylene compressor's one -level entry evaporates the absorptive unit. The utility model discloses at the when used, ethylene mainly loops through tertiary ethylene evaporation absorptive unit and cools off and gas -liquid separation to reclaim the ethylene of after -separating again and carry out cyclic utilization in ethylene compressor, whole device has simple structure, operation steady advantage.