A kind of water separation screen, rolling method and reverse osmosis membrane element

Abstract

The invention discloses a produced water filter screen, a rolling method thereof, and a reverse osmosis membrane element. The produced water filter screen is a square net structure after being unfolded, and the square net structure is formed by interweaving a plurality of bilaterally-spaced and vertically-extending longitudinal ribs and a plurality of vertically-spaced and transversely-extending transverse ribs; the lengths of the plurality of longitudinal ribs are equal to the width of a gap between the adjacent longitudinal ribs; and the transverse ribs have different lengths, and comprise multiple long transverse ribs and multiple short transverse ribs, which are arranged in a staggered manner. After the filter screen is rolled to form a membrane, the direction of the transverse ribs isperpendicular to a water collecting tube, the direction of the longitudinal ribs is parallel to the water collecting tube, the screen mesh dense end is away from the water collecting tube, and the screen mesh sparse end is close to the water collecting tube. The produced water filter screen can reduce the enrichment degree of produced water in order to reduce the pressure of a water production side, so the produced water can smoothly enter the water collecting tube through a produced water channel, that is the water yield is increased on the premise of the same raw water pressure and the samewater inlet flow.

Description

technical field [0001] The invention belongs to the technical field of reverse osmosis membrane elements, and in particular relates to a water production separation net, a rolling method and a reverse osmosis membrane element. Background technique [0002] As a relatively mature technology, reverse osmosis has been recognized by the market. There are many researches on reverse osmosis membranes, including performance improvement of membranes, optimization design of water inlet screens, etc., but relatively few studies on water production screens. Up to now, the water separation screen is only used as a structural part to play the role of flow channel in the reverse osmosis membrane, and guide the generated pure water into the water collection pipe. However, during the research process, it was found that during the working process of the reverse osmosis membrane, in the membrane bag near the water collection pipe, due to the existence of the water production pressure, a part ...

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Problems solved by technology

However, during the research process, it was found that during the working process of the reverse osmosis membrane, in the membrane bag near the water collection pipe, due to the existence of the water production pressure, a part of the water inlet pressure was offset, so that this part of the membrane did not work under the rated pressure. Reduced water production, resulting in lower water production of the whole membrane

The produced water separator serves as the produced water flow channel, supporting the two layers of diaphragms for the flow of produced water. The closer it is to the water collection pipe, the more pure water will be collected. Under the premise that the thickness of the flow channel does not change, the enrichment of the produced water will cause Increased pressure reduces water production efficiency of the membrane

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