Application of Minihydrocyclones in Methanol‐to‐Olefin Process Wastewater Treatment

Abstract

A significant amount of wastewater containing fine catalyst particles is produced in the methanol-to-olefin (MTO) process, which restricts the long-period operation of the processing unit. To address this key problem, a minihydrocyclone was designed for MTO wastewater treatment and tested in the laboratory. Good separation performance and a small cut diameter were achieved under certain feed conditions. Furthermore, a group composed of 300 parallel-arranged minihydrocyclones was applied to the industrial unit in the MTO quench water treatment. The obtained results indicated that the separation efficiency and precision of the minihydrocyclone can meet the requirements of fine catalyst particle separation, and the designed minihydrocyclone group with reasonable parallel configuration exerted an outstanding application effect on the treatment of MTO quench water.

Concentration Distribution of Droplets in a Liquid‐Liquid Hydrocyclone and its Application

“…Due to the advantages of structural simplicity, ease of operation, and compact size, hydrocylones are widely applied in a variety of industrial fields for separating solid or liquid particles from a liquid phase [1,2]. Separation efficiency is closely related to the distribution of the dispersed phase in the inner hydrocyclone, which is affected by the hydrocyclone structure and the operating parameters.…”

An experimental study of flow distribution and separation performance in a UU-type mini-hydrocyclone group

“…The experiments are based on the methanol-to-olefin (MTO) process, where the wastewater from quench tower contains amount of fine catalyst particles [28]. The specific physical properties are listed in Table 2.…”