关键词: 沸腾床过滤, MTO, 急冷水, 催化剂细粉

Abstract: The quench water of methanol to olefin (MTO) project generally contains organic matter and catalyst powder, which leads to unstable operation of water washing column, decreased heat exchange efficiency of heat exchanger, frequent off-line cleaning, high labor intensity and cost of operation and maintenance, and seriously affects the long-term, safe and stable operation of the unit. This paper analyzes and compares several common separation methods, proposes that the fluidized bed filtration method has a great competitive advantage in the deep purification of quench water, and focuses on the detailed introduction of the separation process of fluidized bed. Combined with the actual case, the transformation scheme of fluidized bed filtration technology in MTO quench water is put forward. Through the implemented projects, the total suspended solid concentration in MTO quench water reduces from 2 000 mg/L to less than 30 mg/L, which provides the guarantee of the stable operation of MTO quench water system.

Key words: fluidized bed filtration, MTO, quench water, fine catalyst powder