Casting bonding method for hollow fiber membrane assembly

Abstract

The invention relates to a casting bonding method for a hollow fiber membrane assembly. The method comprises the following steps: 1, adding an inorganic enhancement material to an enpoxy resin or a polyurethane resin which is used as a binder before casting, wherein the weight of the inorganic enhancement material accounts for 2-4% of the weight of the binder; 2, uniformly mixing them; and 3, casting. The inorganic enhancement material comprises 1-5 wt% of organic particles of equal to or greater than 50 meshes and equal to or less than 60 meshes, 10-30 wt% of organic particles of equal to or greater than 60 meshes and equal to or less than 80 meshes, 50-70 wt% of organic particles of equal to or greater than 80 meshes and equal to or less than 120 meshes, 10-30 wt% of organic particles of equal to or greater than 120 meshes and equal to or less than 200 meshes, and 1-5 wt% of organic particles of equal to or greater than 200 meshes. The method of the invention has the advantages of overcome of problems of silk drawing and shelling appearing in the use process, membrane assembly service life improvement, simple technology and low cost.

Description

technical field [0001] The present invention relates to a method of using epoxy resin or polyurethane resin to bond hollow fiber membrane filaments and external structural parts by centrifugal or static casting to form a hollow fiber membrane module. 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 because the hollow fiber membrane, epoxy resin or polyurethane resin, and the outer structural parts are all polymer materials, the bonding force between the interfaces is not strong, and because the epoxy resin or polyurethane resin is solidified during casting During the process, there is volume shrinkage, which makes the epoxy resin or polyurethane resin and the outer structural parts unable to be...

AI Technical Summary

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 is made of epoxy resin or polymer Urethane resin casts and bonds the hollow fiber membrane and the outer structural parts together, but since the hollow fiber membrane, epoxy resin or polyurethane resin, and the outer structural parts are all polymer materials, the bonding force between the interfaces is weak. Strong, and because of the volume shrinkage of epoxy resin or polyurethane resin in the casting and curing process, the epoxy resin or polyurethane resin and the outer structural parts cannot be tightly and completely bonded together, so the membrane module is in use There will be snagging and peeling phenomenon

[0003]The existing technology is to use tools to roughen and roughen the outer structural parts at the junction of epoxy resin or polyurethane resin and the outer structural parts , to increase the friction between the epoxy resin or polyurethane resin and the outer structure to increase the interface bonding. This method is not only time-consuming and laborious, but also has poor results.

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