A method for treating the end of a hollow fiber membrane module before casting
A processing method and fiber membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of long curing time, poor sealing effect, and reduction of effective pores of membrane filament filtration, etc. Fast, improve production efficiency, improve the effect of effective membrane filter holes
Active Publication Date: 2016-01-13
SANDA FILM SCI & TECH XIAMEN +1
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Problems solved by technology
[0002] Membrane module is the core of membrane technology. The structure of membrane module plays a decisive role in the membrane separation process. Now the general membrane module uses epoxy resin or polyurethane resin to cast and bond the hollow fiber membrane filament and the outer structure. Together, but due to the relatively good fluidity of epoxy resin or polyurethane, it will seep through the membrane pores of the component port during the casting process, resulting in blockage of the membrane pores, which will reduce the effective pores of the membrane filter of the component.
[0003] The existing technology uses epoxy resin or polyurethane to seal before casting, but because epoxy resin and polyurethane have good fluidity and long curing time, the sealing effect is poor and the efficiency is low, so it is not suitable for large-scale production
Method used
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Embodiment 1
[0019] This example is a PVDF hollow fiber membrane module of a hollow fiber membrane manufacturer. Before casting, the acrylic resin with a curing time of 5 minutes is used for end-capping treatment. Centrifugal casting is bonded together and cut after curing. The membrane pores at both ends are basically not blocked, and the effective porosity of the membrane filter is 99%.
Embodiment 2
[0021] This example is a PVDF hollow fiber membrane module of a hollow fiber membrane manufacturer. Before casting, the acrylic resin with a curing time of 3 minutes is used for capping treatment, and polyurethane is used as a binder to centrifugally cast the hollow fiber membrane and the outer structure. Bonded together and cut after curing, the membrane pores at both ends are basically not blocked, and the effective porosity of the membrane filter is 98%.
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The invention relates to an end sealing treatment method before casting of a hollow fiber membrane assembly. In order to guarantee that epoxy resin or polyurethane does not enter a membrane yarn inner hole to block a membrane hole in the casting and bonding process, the hollow fiber membrane assembly is subjected to end sealing treatment before casting by using an acrylic resin, casting is performed after the hollow fiber membrane holes at two ends are completely sealed, and the sealed ends are removed after the casting operation is finished. According to the method, the problem that the effective filtering holes of the membrane yarns are reduced because the epoxy resin or polyurethane penetrates into the membrane yarns from the inner hole at the membrane end in the membrane casting and bonding process is solved, and the end sealing treatment method is simple in process and low in cost.
Description
technical field [0001] The invention relates to a method for treating the end of a hollow fiber membrane module before casting, in particular to a method for treating the end of a hollow fiber membrane module before casting with acrylic resin. Background technique [0002] Membrane module is the core of membrane technology. The structure of membrane module plays a decisive role in the membrane separation process. Now the general membrane module uses epoxy resin or polyurethane resin to cast and bond the hollow fiber membrane filament and the outer structure. Together, but due to the relatively good fluidity of epoxy resin or polyurethane, it will seep through the membrane pores of the component port during the casting process, resulting in blockage of the membrane pores, which reduces the effective pores of the component's membrane filter. [0003] The existing technology uses epoxy resin or polyurethane to seal before casting, but because epoxy resin and polyurethane have g...
Claims
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IPC IPC(8): B01D63/02
Inventor 洪昱斌陈慧英许品生蓝伟光
Owner SANDA FILM SCI & TECH XIAMEN