Spiral-wound membrane element manufacturing method

Abstract

The invention discloses a spiral-wound membrane element manufacturing method. A spiral-wound membrane element comprises a water collecting tube and at least one membrane bag wound around the periphery of the water collecting tube. The spiral-wound membrane element manufacturing method comprises the steps that S10, a thin membrane sheet for forming the membrane bag is welded on the water collecting tube; S20, the thin membrane sheet for forming the membrane bag is welded together along a side boundary to form a single membrane bag; S30, at least one membrane bag is wound around the water collecting tube. By adopting the spiral-wound membrane element manufacturing method, the membrane bag side boundary width of flat sheet membrane spiral-wound membrane elements such as a reverse osmosis membrane, a nanofiltration membrane and an ultrafiltration membrane can be accurately controlled, accordingly effective membrane area is larger, meanwhile membrane bag side boundary bonding can be completed within a short time, and a production period can be shortened.

Description

Technical field [0001] The invention relates to the technical field of water purification equipment, in particular to a manufacturing method of a spiral wound membrane element. Background technique [0002] In the prior art, the manufacturing method of the spiral membrane element mainly includes the following steps: 1-laying the first layer of membrane; 2-applying glue on the edge of the first layer of membrane; 3-laying the layer of water production Guide cloth; 4-lay the second layer of membrane; 5-roll the membrane with glue and the water-producing guide cloth onto the water collecting pipe, and form a membrane bag after the glue is cured. Since it takes a certain time for the glue to solidify, the spiral wound membrane element in the prior art needs to be parked for a long time after the winding is completed before entering the next process, and the entire production cycle is long; in addition, the glue is applied before laying It is difficult to precisely control the edge w...

AI Technical Summary

Problems solved by technology

Since the glue needs a certain amount of time to cure, the spiral-wound membrane elements in the prior art need to be parked for a long time before entering the next process after being rolled, and the entire production cycle is relatively long; It is difficult to accurately control the width of the side line of the film bag by the operation method of the film, and the glue is still easy to impregnate other parts during the rolling process, which leads to the inability to accurately control the effective area of ​​the film bag, which is often smaller than expected

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