METHOD FOR REDUCING POLLUTANT DISCHARGE IN PHENOL ACETONE PRODUCTION

摘要

A method for reducing pollutant discharge in phenol acetone production, comprising at least one of the following steps: (A) collecting phenolic wastewater generated by a phenol acetone production device, adjusting the pH value to acidic, and performing extraction and recovery on the phenols in wastewater using cumene as an extracting agent; (B) reducing the acetone content in the wastewater of a tower kettle by means of optimizing the process of an acetone refining tower; (C) treating the wastewater of the tower kettle of the acetone refining tower by using a permselective membrane, and recovering alkali; (D) neutralizing the wastewater of the tower kettle of the acetone refining tower after the step of recovering alkali in step (C), mixing the neutralized wastewater with a condensation liquid at the top of a cumene oxidation tower, and carrying out a detoxification treatment; (E) carrying out an oil separation treatment on total discharged water from the phenol acetone device, and recovering organic matters comprising hydrocarbons; and (F) carrying out a biological treatment, a coagulation sedimentation treatment and a reinforced degradation treatment on the wastewater after undergoing the oil separation treatment. The method has at least one of characteristics of being capable of recovering resources, increasing product yield, reducing pollutant discharge, having low cost in wastewater treatment, and having stable quality for water output.