Roll-type reverse-osmosis membrane element with variable-thickness channel net

A technology of reverse osmosis membrane and thickness change, applied in reverse osmosis, semi-permeable membrane separation, membrane technology and other directions, can solve problems such as pollution

Active Publication Date: 2010-05-26
A O SMITH (CHINA) ENVIRONMENTAL PRODUCTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a roll-type reverse osmosis membrane element with a change in the thickness of the flow channel network, which is used to alleviate the phenomenon of con

Method used

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  • Roll-type reverse-osmosis membrane element with variable-thickness channel net
  • Roll-type reverse-osmosis membrane element with variable-thickness channel net
  • Roll-type reverse-osmosis membrane element with variable-thickness channel net

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Embodiment Construction

[0012] Such as figure 1 As shown, the roll-type reverse osmosis membrane element 10 of the present invention with a variable channel network thickness is composed of two sets of water purification membranes composed of pure water diversion net 100, reverse osmosis membrane 200, and water inlet diversion net 300. 11 is wound on the central water production pipe 400 to form.

[0013] Wherein, the reverse osmosis membrane 200 forms the water inlet flow channel 210 through folding the inner surface, and forms the water production flow channel 220 between the adjacent outer surfaces (the lower outer surface of the reverse osmosis membrane of the bottom water purification membrane group and the water purification of the top layer The upper and outer surfaces of the reverse osmosis membranes of the membrane group also form a water production flow channel after winding), the water inlet flow channel 300 is located in the water intake flow channel 210 , and the pure water flow guide ne...

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Abstract

The invention discloses a roll-type reverse-osmosis membrane element with a variable-thickness channel net, formed by overlapping and winding a pure-water diversion net, a reverse-osmosis membrane and an inlet diversion net on a center water-producing pipe. The inlet diversion net and the pure-water diversion net are respectively postioned in an inlet channel formed by the inner surface of the folded reverse-osmosis membrane and a water-producing channel formed by adjacent outer surfaces. The roll-type reverse-osmosis membrane element with the variable-thickness channel net is characterized in that the thickness of the inlet diversion net is gradually reduced along the flowing direction of raw water in the inlet channel. After improvement, when the inlet flow rate and the inlet flow value have constant lengths, the thickness of the inlet channel net is reduced, and the inlet flow rate can increase so that the flow rate of water on the membrane surface is increased, therefore, the invention lessens the concentration difference polarization phenomena of the membrane surface at the water concentrating end of the membrane element, stabilizes the desalting rate and the water-generating amount, decreases the pollution rate of the membrane element and prolongs the service life of the reverse-osmosis membrane.

Description

technical field [0001] The invention belongs to the technical field of water purification treatment, and relates to a reverse osmosis membrane element for removing impurities such as sediment, silt, colloid, microorganisms, viruses, organic matter and inorganic salts in water, and in particular to a roll-type reverse osmosis membrane with variable channel network thickness element. Background technique [0002] The roll-type reverse osmosis membrane element is composed of several standard size reverse osmosis membranes with exactly the same size, size and shape, a pure water diversion net, and an inlet water diversion net wound around the central water production pipe. The existing roll-type reverse osmosis membrane element adopts the water inlet guide net with the same thickness and weaving density. As part of the feed water permeates to the back of the reverse osmosis membrane to form pure water, the flow of feed water will become smaller and smaller. Usually, the final f...

Claims

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Application Information

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IPC IPC(8): B01D63/10B01D61/08
CPCY02A20/131
Inventor 侯贻直
Owner A O SMITH (CHINA) ENVIRONMENTAL PRODUCTS CO LTD
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