Abstract: The present disclosure relates to a method and apparatus for prolonging a continuous operation period of a methanol-to-olefins water washing process. The method may perform micro cyclone treatment on methanol-to-olefins washing water. The method may also deliver the washing water subjected to micro cyclone treatment and oil removal to a fluidized bed separator for treatment. The method may also adjust the backwash flow to release the intercepted catalyst powder and empty the dirt holding capacity of a pore. The method may also perform three-phase separation on a gas-liquid-solid mixture subjected to backwash, returning the obtained filter media to a particle bed layer, and respectively discharging a backwashing liquid a backwashing gas which comprise a catalyst. The method may also switch the fluidized bed separator to a normal working state, completing the active regeneration of the particle bed layer, and continuing to operate.

Abstract: Disclosed are a fluidized bed separation method and device for methanol-to-olefins quenched water. The method may subject quenched water to liquid-solid separation via a micro-cyclone separator. The method may also subject clear liquid from the micro-cyclone separator to a secondary separation via a fluidized bed separator, then sending the same to an olefin separation device, then recovering some waste heat of the quenched water, and then returning the same to a quenching tower after performing heat exchange. The method may also regenerate a separation medium by reversely feeding stripping tower purified water or quenched water, so as to release catalyst particles absorbed by the separation medium. The method may also send a catalyst slurry concentrated by the micro-cyclone separator and the fluidized bed separator to a filter-press unit for filter-press dehydration, so as to recover a catalyst.

Abstract: The present disclosure relates to a deep purification device and method for methanol-to-olefin washing water. Provided is a deep purification device for methanol-to-olefin washing water, comprising: a quench tower (1-1), a water washing tower (1-2) connected to an outlet at the top of the quench tower (1-1), a boiling bed separator (1-3) having the top thereof connected to the bottom of the water washing tower (1-2), a fiber coalescer (1-4) connected to the bottom of the boiling bed separator (1-3), and a buffer settling tank (1-5) connected to the sidewall of the boiling bed separator (1-3) at a position near the top. Further provided is a deep purification method for methanol-to-olefin washing water.