A rolled membrane element and its rolling method

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 reduced product water desalination rate, reduced water production of components, high osmotic pressure of concentrated water, etc. Filtration performance, high water yield, water quality improvement effect

Active Publication Date: 2017-12-29
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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  • A rolled membrane element and its rolling method
  • A rolled membrane element and its rolling method
  • A rolled membrane element and its rolling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as 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 o...

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 invention relates to the technical field of rolled membranes, in particular to a rolled membrane element and its rolling method. By controlling the ratio of the water inlet end to the water outlet end, the rolled membrane elements suitable for different water qualities are rolled, and passed A membrane with high desalination rate is installed at the water inlet, and a high-flux membrane is installed at the outlet, and through the combination of dense screen, membrane, light screen and membrane, various membranes are glued to obtain high-efficiency Flux, high water production rate and high anti-pollution rate of the spiral membrane element, and make the desalination rate and flux of the front and rear are relatively uniform, which solves the problem that the desalination rate and flux of the rear end of the traditional spiral membrane element are significantly lower than those of the front end technical problem.

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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Patent Type & Authority Patents(China)
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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