Method for welding and sealing reverse osmosis membrane

Abstract

The invention discloses a method for welding and sealing a reverse osmosis membrane which comprises membranes for forming the reverse osmosis membrane and a yielded water collection net. The method comprises the following steps of: sealing membranes, or sealing two membranes and the yielded water collection net between the membranes; in the sealing process, firstly sealing by hot melting; and after sealing by hot melting, pressing by ultrasonic wave welding. In the method, a mode of combining heat source heating sealing with ultrasonic wave sealing is adopted to seal the two reverse osmosis membranes or seal the reverse osmosis membranes and the yielded water collection net between the reverse osmosis membranes, the membranes or the membranes and the yielded water collection net are fused and glued by hot melting, and finally, the ultrasonic wave welding technology is used for pressing. Therefore, the membranes and the yielded water collection net have better fitting degree and better sealing effect, and the flatness of the sealing point can be guaranteed.

Description

technical field [0001] The invention relates to a welding and sealing method for a reverse osmosis membrane, belonging to the technical field of reverse osmosis membrane sealing. Background technique [0002] As a new, efficient and energy-saving separation technology, membrane separation technology gradually occupies an important position in the field of water and other liquid separation. At present, it has been widely used in many fields such as seawater desalination, reclaimed water reuse, and slightly polluted surface water treatment. [0003] From the proposal of seawater desalination with reverse osmosis technology in 1953, to the commercial operation in the 1960s, and after more than 50 years of development, reverse osmosis water treatment technology has been successfully applied in many fields. Reverse osmosis technology occupies an important position in the field of water and liquid separation with its new, efficient and energy-saving separation technology. It was ...

AI Technical Summary

Problems solved by technology

This adhesive machine bonding and sealing method is suitable for most water treatment fields, but in some fields with complex water quality, the water quality may erode the membrane adhesive and cause the seal to fail

At the same time, the existing adhesives are inconvenient to use in the production of reverse osmosis membrane elements, such as long curing time (requires hours or even days); high curing requirements (requires constant temperature and constant humidity), etc.