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| Experimental research of metal microporous membranes in filtration of methanol to olefins（MTO）chilled water |
| GUO Yu，WANG Qiang-bing，LI Ye，YANG Bao-jun，LI Cheng |
| （State Key Laboratory of Porous Metals， Northwest Institute for Non-Ferrous Metal Research， Xi’an 710016， China） |
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Abstract Metal powder microporous membrane and wire mesh microporous membrane with filtration accuracy of 1 μm were used as the core filter element in filtration of methanol to olefins（MTO）chilled water for experimental research. The change of dust concentration in chilled water， pressure difference and flow of filter during the filtration， failure cause of filter element were studied. The results show that metal powder microporous membrane and wire mesh microporous membrane can both reduce the dust concentration of chilled water below 5 mg/m3. The pressure difference is smaller， the flow is bigger during the filtration and the effect of regeneration is better when the wire mesh microporous membrane is used as the filter element relative to metal powder microporous membrane. The failure cause of the metal powder microporous membrane is aggregates （100-200 μm） bond on the surface of filter element， which is constituted of catalyst particles （1-2 μm） that wrapped in and bond together by grease in chilled water. The aggregates can be removed by the regeneration method of butanone cleaning and high pressure nitrogen purging， the relative permeability coefficient is restored to 77.7% of that before filtration.
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Received: 09 June 2017
Published: 27 February 2018
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2018, Vol. 28 
