Manufacturing method of roll-type reverse osmosis membrane element

Abstract

The invention relates to a manufacturing method of a roll-type reverse osmosis membrane element, which comprises the following steps: folding the front of the reverse osmosis membrane in half, and inserting a water inlet spacer between the opposite fronts; Under one diaphragm, glue is applied between the pure water diversion cloth and the reverse side of the first diaphragm, so that the pure water outlet is formed between the first diaphragm and the pure water diversion cloth at the folded edge of the reverse osmosis diaphragm The pure water flow channel; connect the short side of the pure water diversion cloth away from the pure water outlet to the concentrated water pipe, and then roll the pasted reverse osmosis membrane, water inlet screen and pure water diversion cloth on the concentrated water pipe Above: Glue is applied to the end faces of the rolled reverse osmosis membrane and the water inlet screen to seal the raw water flow channel, and the glue is applied to the part close to the concentrated water pipe. During water production, the raw water flows along the long side of the raw water flow channel for osmotic filtration, and the water production efficiency is high. At the position close to the concentrated water pipe, the flow velocity of the concentrated water in the raw water flow channel is relatively high, which effectively alleviates the phenomenon of concentration polarization on the concentrated water side.

Description

technical field [0001] The invention relates to the field of water purification, in particular to a method for manufacturing a roll-type reverse osmosis membrane element. Background technique [0002] Rolled reverse osmosis membrane components mainly include reverse osmosis membrane, water inlet screen, pure water diversion cloth and central water production pipe. The water purification element is formed by rolling the water inlet screen, the reverse osmosis membrane and the pure water guide cloth on the central water production pipe. In the process of use, the osmosis function of the reverse osmosis membrane is used to pressurize the raw water side so that the water molecules in the raw water permeate through the reverse osmosis membrane and converge on the pure water side to form pure water. As the water flow in the raw water channel moves forward, the raw water gradually forms concentrated water on the concentrated water side, and finally the concentrated water flows out...

AI Technical Summary

Problems solved by technology

General reverse osmosis membrane elements have obvious concentration polarization phenomenon on the concentrated water side, and the service life of the elements is short

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