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Electrodialysis separation plate for homogeneous membrane and preparation method thereof

An electrodialysis, homogeneous membrane technology, applied in the field of water treatment, achieves the effects of good electrical insulation, thin thickness and wide application prospects

Inactive Publication Date: 2015-12-23
XIAMEN KENING WOTE WATER TREATMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no specific report on the use of thermoplastic elastomer (TPE) materials, the use of thermocompression technology to prepare electrodialysis separators for homogeneous membranes, and the thickness of the separators is thinner than 0.6mm

Method used

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  • Electrodialysis separation plate for homogeneous membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] As a specific example, such as figure 1 As shown, an electrodialysis separator for a homogeneous membrane is made, which is composed of a separator frame 1 and a separator net 2, in which a circular water distribution hole 3 is arranged, and there is a gap between the upper and lower circular water distribution holes 3. Dead-end non-loop water distribution channel 5 and mesh distribution water tank 4. Choose thermoplastic elastomer (TPE) with a thickness of 0.4mm, punch holes according to the shape and cut it into a partition frame; use a polyester (PET) woven mesh with a thickness of 0.4mm, punch and cut it into a partition net according to the shape; Stack them together and put them into heat pressing equipment for heat pressing. The temperature was 105°C. The pressure is 25kg / cm2, and the heat-pressing time is 20 seconds; the separator after heat-pressing is punched and trimmed according to the size to prepare a usable electrodialysis separator. The actual thickne...

Embodiment 2

[0027] With the same structure as in Example 1, select thermoplastic elastomer (TPE) with a thickness of 0.5 mm, punch holes according to the shape and cut it into a partition frame; Stack the separator frame and the separator net together, and put them into the heat-pressing equipment for heat-pressing. The temperature is 120°C. The pressure is 30kg / cm2, and the heat pressing time is 10 seconds; the heat-pressed separator is punched and trimmed according to the size to prepare a usable electrodialysis separator. The actual thickness of the separator is 0.55mm.

[0028] According to the assembly method of ordinary electrodialyzers, 100 electrodialysis separators processed above, and 50 pairs of homogeneous ion exchange membranes (positive and negative membranes) (the size of the separators and membranes are both 200X400mm) are assembled into an electrodialyzer. dialyzer. Water flow, water inlet pressure 1.3bar, no water leakage; the pressure difference of each chamber was 0...

Embodiment 3

[0030] With the same structure as in Example 1, select thermoplastic elastomer (TPE) with a thickness of 0.5 mm, punch holes according to the shape and cut it into a partition frame; Stack the separator frame and the separator net together, and put them into the heat-pressing equipment for heat-pressing. The temperature is 100°C. The pressure is 40kg / cm2, and the heat-pressing time is 15 seconds; the separator after heat-pressing is punched and trimmed according to the size to prepare a usable electrodialysis separator. The thickness of the separator is measured to be 0.46mm.

[0031] According to the assembly method of ordinary electrodialyzers, 100 pieces of electrodialysis separators processed above and 50 pairs of homogeneous ion exchange membranes (positive and negative membranes) (the size of the separators and membranes are both 400X800mm) were assembled into an electrodialyzer. dialyzer. Water flow, water inlet pressure 1.5bar, no water leakage; the pressure differe...

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Abstract

The invention relates to the water treatment technical field, provides an electrodialysis separation plate for a homogeneous membrane and a preparation method thereof. The separation plate is composed of a separation plate frame and a separation plate net; the separation plate frame is a thermoplastic elastomer (TPE), the separation plate net is a polyester (PET) net, and the separation plate frame and the separation plate net are laminated together through high temperature heating. Through improvement of materials and a processing technology, the high-performance electrodialysis separation plate having the advantages of environmental-protection materials, thin thickness, good elasticity, good electrical insulativity and corrosion resistance is provided, is widely used in electrodialysis equipment using the homogeneous membrane, and improves the current efficiency of a homogeneous membrane electrodialysis system.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to an electrodialysis separator for a homogeneous membrane and a preparation method thereof. Background technique [0002] Electrodialyzer is composed of membrane stack, water distribution plate, electrode plate, locking parts and so on. The membrane stack is composed of separators and ion exchange membranes, one separator and one ion exchange membrane are stacked repeatedly. [0003] The structure of the electrodialyzer should meet the following conditions: good sealing performance, no external leakage, no mixed flow inside; good insulation performance, small leakage coefficient, high current efficiency; smooth flow channel, uniform water flow distribution, no dead angle; small membrane stack resistance , The non-membrane stack has a small voltage drop ratio and saves electricity; it has high mechanical strength, stable dimensions, and good chemical corrosion resistance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/46C02F1/469
Inventor 邱国强
Owner XIAMEN KENING WOTE WATER TREATMENT TECH
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