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Spiral-wound membrane element and rolling method thereof

A roll-type membrane and membrane element technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of product water desalination rate reduction, element water production reduction, concentrated water osmotic pressure, etc., to improve Filtration performance, high water production rate, and the effect of improving water quality

Active Publication Date: 2016-03-09
VONTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for a high recovery rate, the following technical problems will occur: 1. The desalination rate of the product water decreases; 2. The precipitation of slightly soluble salt may occur; 3. The osmotic pressure of the concentrated water is too high, and the water production of the element decreases.

Method used

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  • Spiral-wound membrane element and rolling method thereof
  • Spiral-wound membrane element and rolling method thereof
  • Spiral-wound membrane element and rolling method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 , 2 As shown in , 3, a roll-type membrane element includes a water inlet A and a water outlet B, wherein the water inlet A is connected to the high desalination membrane 1 through a connecting piece 7; the water outlet B is connected to the high flux membrane 2 Connected by connecting piece 7; and glue lines 6 are coated on the front and back sides of the high desalination membrane 1 and the high flux membrane 2; the high desalination membrane 1 and the high flux membrane 2 are used as membranes The innermost layer of the element, in turn outwards, also includes a thick net 3, a diaphragm 5, a thin net 4 and two layers of diaphragm 5 connected to the central axis of the membrane element composed of the water inlet A and the water outlet B through the connector 7 , wherein, the thick net 3, the diaphragm 5, the front and back of the first layer of diaphragm 5 behind the thin net 4 and the thin net 4 are all coated with glue lines 6, and the front side of t...

Embodiment 2

[0042] On the basis of embodiment 1,

[0043] The diaphragm 5 behind the thick net 3 is 3 layers.

[0044] Described light net 4 is 4 layers.

[0045] The thickness of the thick net 3 is 30mil.

[0046] The membrane 5 is an ultrafiltration membrane.

Embodiment 3

[0048] On the basis of embodiment 1,

[0049] The diaphragm 5 behind the thick net 3 is 2 layers.

[0050] Described light net 4 is 3 layers.

[0051] The thickness of the thick net 3 is 29mil.

[0052] The membrane 5 is a reverse osmosis membrane.

[0053] In the rolling process of the rolled membrane element, the inner layer of high desalination membrane 1 and high flux membrane 2 can be wound around the central axis composed of water inlet A and water outlet B, and then Roll up the thick net 3, wrap the high desalination membrane 1 and the high flux membrane 2 and bond them together with the glue on the glue line 6, wrap the thick net 3 with the membrane 5 in turn, and then use the thin net 4 Wrapping the diaphragm 5, wrapping the light net 4 with the diaphragm 5, and adding a layer of diaphragm 5 for overall wrapping, the roll-type membrane element can be obtained.

[0054] When using the diaphragm 5, the diaphragm 5 between the thick net 3 and the thin net 4 is a comb...

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Abstract

The present invention relates to the technical field of spiral-wound membranes, in particular to a spiral-wound membrane element and a rolling method thereof. The spiral-wound membrane element with high-flux, a high water production rate and a high pollution-resistance rate is acquired by: controlling a ratio of a water inlet end to a water outlet end to further roll spiral-wound membrane elements adaptive to different water qualities; arranging a high-desalination-rate membrane sheet at the water inlet end; arranging a high-flux membrane sheet at the water outlet end; combining a dense net and a membrane sheet, and a sparse net and a membrane sheet; and gumming various membrane sheets. The spiral-wound membrane element has a relatively uniform desalination rate and flux at both a front end and a rear end, so that the technical problem that the desalination rate and flux of a conventional spiral-wound membrane element at the rear end are obviously lower than those at the front end is solved.

Description

technical field [0001] The invention relates to the technical field of rolled membranes, in particular to a rolled membrane element and a rolling method thereof. Background technique [0002] As a new type of high-efficiency separation, concentration, purification and purification technology, reverse osmosis membrane separation technology has developed rapidly in the past 30 years and has been widely used in pure water preparation, seawater desalination and wastewater treatment industries. The reverse osmosis membrane is the key element in the reverse osmosis system. In practical applications, in order to improve the efficiency of water resource utilization, the system recovery rate will be increased accordingly. Due to the large number of membrane elements and long water supply process of industrial large-scale reverse osmosis devices, the actual system recovery rate is generally above 75%, and sometimes even can reach 90%. Higher system recovery is also required for smal...

Claims

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Application Information

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IPC IPC(8): B01D63/10
CPCY02A20/131
Inventor 梁松苗张慧林蔡志奇吴宗策金焱
Owner VONTRON TECH CO LTD
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