NOVELTY - A solvent absorption device comprises absorption tower (1), regeneration tower (2), heat exchanger (3), pressure pump (4), cooler (5), dryer (6), and reboiler (7). Ethylene is recovered by introducing feed gas containing ethylene into absorption tower filled with mixed tetra-carbon lean absorbent and filler, contacting ethylene gas with hydrogen, methane, and carbon monoxide from the bottom, sending rich absorbent into heat exchanger and regeneration tower, heat stripping rich absorbent, and further purifying regenerated ethylene.    USE - Solvent absorption device used for recovering ethylene (claimed).    ADVANTAGE - The device reduces energy consumption.    DETAILED DESCRIPTION - A solvent absorption device comprises absorption tower (1), regeneration tower (2), heat exchanger (3), pressure pump (4), cooler (5), dryer (6), and reboiler (7). Ethylene is recovered by introducing feed gas from demethanizer system containing ethylene into absorption tower filled with mixed tetra-carbon lean absorbent and filler promoting gas-liquid contact, where tower top pressure is 1.8-2.4x 106, tower top temperature is - 30 degrees C to - 45 degrees C, and bottom temperature is 11 degrees C, contacting ethylene gas with hydrogen, methane, and carbon monoxide from the bottom to form rich absorbent, sending rich absorbent into heat exchanger and regeneration tower having tower top pressure of 1.1 MPag, tower top temperature of 4 degrees C and bottom temperature of 67 degrees C, heat stripping rich absorbent in reboiler, further purifying regenerated ethylene, sending to heat exchanger through pressure pump, cooling to - 40 degrees C, further cooling with propylene refrigerant to - 35 degrees C, returning to absorption tower, processing absorbent with mixed tetra-carbon rectification system and drying.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of solvent absorption device.    Absorption tower (1)    Regeneration tower (2)    Heat exchanger (3)    Pressure pump (4)    Cooler (5)    Dryer (6)    Reboiler (7)