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中空纤维超滤膜的工作压力是多少？
发布日期：2022-05-26 09:33:06

中空纤维超滤膜的压力范围是0.1～0.6MPa，指在超滤的定义内，处理标准溶液系统使用的压力。分离得到不同分子量的物质，我们选用具有相应截留分子量的超滤膜，则操作压力作用就会影响有所了解不同。一般塑壳中空纤维内压膜，外壳耐压强度明显小于0.3MPa。


中空纤维超滤膜耐压强度设计一般也会低于0.3MPa，因此工作人员压力应低于0.2MPa，而膜的两侧压差应不大于0.1MPa。可以看出，因为内压膜直径存在较大，如果用作外压膜时、经常会易于压扁并在粘结处切断，引起严重损坏，所以公司内外压膜不能作为通用。


中空纤维超滤膜需要在合适的时间，以使用下一步骤一定的压力超滤液，应该是不锈钢外壳超滤膜，中空纤维超滤膜，使用为0.6MPa的压力下，和压力向上提供超滤液30米水柱，即0.3MPa的压力，但必须保持内外的中空纤维膜的压力不大于0.3MPa。


中空纤维超滤膜在选择自己工作环境压力的时候除根据膜及外壳耐压强度为外，这时还要考虑膜的压密性和膜的耐污染性，压力越高透水量影响会越大，这时被截留的物质在膜表面形成积聚越多，阻力系数越大，会引起透水速率的衰减。此外进入膜微孔中的微粒也易于发生堵塞发展通道。

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