Glue sealing method of hollow fiber film unit

Abstract

The invention discloses a glue sealing method of a hollow fiber film unit. The glue sealing method comprises the following steps of: (1) shredding; (2) plugging a hole, coating a reserved part of a unit film silk flock with polyurethane glue with the mixture ratio of A:B being equal to 70:100, patting the unit flock, and recoating the glue for two times after the first coating so as to guarantee that a 2mm-3mm glue layer is formed on the root of the reserved part of the unit flock; (3) stewing the unit flock for 50-90 minutes until the surface of the polyurethane glue is dried; (4) sleeving a silicone tube on the end of the unit flock, wherein the distance from the bottom of the silicone tube to the end of film silk is 3mm-4mm, and the outer diameter of the silicone tube is slightly greater than the inner diameter of a tube bundle; and (5) pouring epoxy glue at 40 DEG C in the tube bundle, and carrying out glue insertion on the pipe bundle slowly, thus forming a glue layer of 4mm-5mm on the bottom of the film silk flock. The glue sealing method provided by the invention can effectively reduce the possibility of point leakage after the unit flock is manufactured, can obviously reduce bubbles, and ensures that bubbles generated in the tube bundle cannot influence the quantity of leaked points under pressure, and thus the qualification rate of the unit flock is obviously improved.

Description

technical field [0001] The invention relates to the field of waste water treatment products, in particular, the invention relates to a sealing method for a hollow fiber membrane unit. Background technique [0002] During the production process of the column membrane, the membrane filament and the tube bundle need to be fixed by glue when the water inlet end is made, and this operation must ensure that the glue can completely block the central hole of the membrane filament at the water inlet end, so that the sewage is filtered. It penetrates from the surface of the membrane filament instead of entering directly from the end of the membrane filament, so that the water can be completely and effectively filtered to ensure the quality of the produced water. The current tube bundle sealing method is to first pour about 15g of epoxy glue into the tube bundle, and when the glue temperature reaches 50°C, the membrane filaments are rotated and inserted twice, leaving a 3-4mm adhesive ...

AI Technical Summary

Problems solved by technology

However, although the existing two-time glue insertion method is better than the initial one-time glue insertion method, it still cannot meet the high-quality requirements.

Because after the glue is inserted, before the glue is cured, the membrane filament will absorb glue, so it will cause large bubbles at the bottom of the tube bundle

Moreover, sometimes some membrane filaments do not absorb glue due to uneven force during glue insertion, so in this case, leakage points will occur, which will affect product quality.

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