Method and device for treating ethylene waste lye

The invention relates to a method and a device for treating ethylene waste lye, the ethylene waste lye enters a gas floating unit for treatment, is conveyed to a heat exchange unit after treatment, enters a wet oxidation unit after heat removal, and is in contact with oxygen-containing gas under the pressure condition of keeping the solution in a liquid phase for wet oxidation reaction; the oxidized material is returned to the heat exchange unit to preheat the waste alkali liquid, the material after heat exchange is cooled and decompressed and then enters the gas-liquid separation unit, and the gas phase after gas-liquid separation is returned to the air floatation unit. According to the characteristics of the ethylene waste alkali liquor, reaction heat is utilized to the maximum extent, and meanwhile, the problems that heat exchange equipment is blocked due to thermal polymers in the long-term operation process, and local overtemperature is generated in the wet oxidation process can be solved. 本发明涉及一种处理乙烯废碱液