A olefin separation device for coal -based olefin

The utility model provides an olefin separation device for coal -based olefin. The utility model discloses an olefin separation device includes: compressor unit, this compressor unit includes the first section of compressor, compressor second section, compressor third section and compressor fourth section, the first section of this compressor has first compression entry, first compression export and first water filling port, this compressor second section has second compression entry, second compression export and second water filling port, this compressor third section has third compression entry, third compression export and third water filling port, this compressor fourth section has fourth compression entry and fourth compression export, water injection device is with the one or more intercommunication in this first water filling port, second water filling port and the third water filling port for one or more to in the first section of this compressor, compressor second section andthe compressor third sec