CN105169950A - Electrodialysis separation plate for homogeneous membrane and preparation method thereof - Google Patents
Electrodialysis separation plate for homogeneous membrane and preparation method thereof Download PDFInfo
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- CN105169950A CN105169950A CN201510496292.7A CN201510496292A CN105169950A CN 105169950 A CN105169950 A CN 105169950A CN 201510496292 A CN201510496292 A CN 201510496292A CN 105169950 A CN105169950 A CN 105169950A
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- dividing plate
- homogeneous membrane
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- electrodialysis spacer
- membrane electrodialysis
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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
The present invention relates to water-treatment technology field, be specifically related to a kind of homogeneous membrane electrodialysis spacer and preparation method thereof.
Background technology
Electric dialyzator is made up of membrane stack and water dispensing board, battery lead plate, locking member etc.Membrane stack is made up of dividing plate and amberplex, and dividing plate amberplex is repeatedly stacking.
Electric dialyzator structure should possess following condition: good seal performance, outside ne-leakage, inner without mixed flow; Good insulation preformance, leakage coefficient is little, and current efficiency is high; Runner is unimpeded, and water-flow equation is even, without dead angle; Resistance is little, and non-membrane stack voltage drop ratio is little, power saving; Mechanical strength is high, dimensionally stable, and resistance to chemical corrosion is good.Realize above-mentioned condition, the performance of dividing plate is crucial.
Electrodialysis spacer, is divided into large-scale dividing plate, medium-sized dividing plate and small-sized dividing plate by size; Frame net integration dividing plate and frame net disintegration formula dividing plate is divided into by structure; Be divided into thick dividing plate and way-board by thickness, the dividing plate that thickness is less than 1mm is called way-board, and the liquid stream stirring and mixing effect of way-board is good, compartment resistance is little, limiting current density is high, and the designing requirement of homogeneous membrane electric dialyzator uses way-board, and being divided into by water flow mode has loop dividing plate and without loop dividing plate.
The basic material of homogeneous membrane electrodialysis spacer requires: surfacing, and thickness is homogeneous, and frame net mates, and frame hole structure is even, and mesh size is suitable for; Dimensionally stable, indeformable, not easily aging, there is certain elasticity so that sealing; Dividing plate frame good insulation preformance, leakproof; Energising area large (70%-80%), resistance is little; Chemical stability and good heat resistance; Liquid stream is evenly distributed, and dead space area is little, and deep or light liquid stream is not obscured; Strong to the stirring action of liquid stream, liquid flowing resistance loss is little; Machine-shaping is convenient, low price.
Through many people were to the research of dividing plate in recent years, electrodialysis spacer preparation technology also has innovation.CN103990381A discloses a kind of high temperature resistant electroosmosis board dividing plate and preparation method thereof, and this invention uses disposable casting process to prepare dividing plate; CN102921303A discloses a kind of electrodialysis spacer of surface band potted line.But have no and use thermoplastic elastomer (TPE) (TPE) material, use hot pressing technique to prepare concrete report that homogeneous membrane electrodialysis spacer and block board thickness are thinner than 0.6mm.
Summary of the invention
Solving the problems of the technologies described above, the invention provides a kind of homogeneous membrane electrodialysis spacer and preparation method thereof, is prepare dividing plate by hot pressing technique; Dividing plate frame is thermoplastic elastomer (TPE) (TPE), and dividing plate net is terylene (PET) net, presses together after high-temperature heating is crossed by dividing plate frame and dividing plate Netcom.
In order to achieve the above object, one of the technical solution adopted in the present invention is, a kind of homogeneous membrane electrodialysis spacer, be made up of dividing plate frame and dividing plate net, described dividing plate frame is thermoplastic elastomer (TPE) (TPE), dividing plate net is terylene (PET) net, presses together after high-temperature heating is crossed by dividing plate frame and dividing plate Netcom.
As preferably, described thermoplastic elastomer (TPE) (TPE) is dienes TPE, is mainly the isomer of natural rubber, has good mechanical strength and scratch resistance, water proofing property.
As preferred further, the thickness of described dienes TPE is 0.2mm-0.6mm, and color includes but not limited to Transparent color.
As preferably, described terylene (PET) net is mesh grid, and resistance to water-flow is little and stirring action is strong.
As preferred further, the thickness of described mesh grid is 0.2mm-0.6mm, and mesh size is 0.2-0.3mm.
As preferably, described electrodialysis spacer is also provided with circular water distributing pore and net formula cloth tank, and takes without dead angle runner design.Described electrodialysis spacer is also provided with circular water distributing pore and net formula cloth tank, to improve water velocity; , take without dead angle runner design meanwhile, avoid runner to deposit, for the industry such as food, medicine.
Further, the thickness of described electrodialysis spacer is 0.4mm-0.6mm, can effective reduction resistance, improves current efficiency.
In order to achieve the above object, two of the technical solution adopted in the present invention is, a kind of homogeneous membrane electrodialysis spacer preparation method, comprises the following steps: dividing plate frame, dividing plate net are cut into required form by (1) respectively; (2) the dividing plate frame cut and dividing plate net are stacked together, shaping with hot pressing equipment hot pressing; (3) punching, cutting edge, directly form a dividing plate.
As preferably, in hot pressing process, mode of heating is electrical heating, and to facilitate temperature accurately to control, temperature is 80-180 DEG C, and further preferably, temperature is 100-150 DEG C.As preferably, pressure during pressing is 20-80kg/cm2.Further preferably, pressure is 25-50kg/cm2.
The present invention is by adopting technique scheme, compared with prior art, tool has the following advantages: have that thickness is thin by electrodialysis spacer of the present invention, good springiness, a feature such as corrosion-resistant, strong and liquid flowing resistance loss is little to the stirring action of liquid stream, is applicable to the electrodialysis plant using homogeneous membrane.
The preparation method of electrodialysis spacer of the present invention adopts hot pressing technique to prepare dividing plate, has thickness thin, good, the corrosion resistant high-performance of good springiness, electrical insulating property.And processing technology is simple, material cost is suitable, is with a wide range of applications.
Accompanying drawing explanation
Fig. 1 is embodiments of the invention 1, the structural representation of 2,3;
[symbol description]
1, dividing plate frame 2, dividing plate net 3, water distributing pore 4, cloth tank 5, water distribution channel.
Detailed description of the invention
Now the present invention is further described with detailed description of the invention by reference to the accompanying drawings.
Embodiment 1:
As a specific embodiment, as shown in Figure 1, make a kind of homogeneous membrane electrodialysis spacer, be made up of dividing plate frame 1 and dividing plate net 2, wherein being furnished with circular water distributing pore 3, is without loop water distribution channel 5 and net formula cloth tank 4 without dead angle between upper and lower two circular water distributing pores 3.Select 0.4mm thickness thermoplastic elastomer (TPE) (TPE), be cut into dividing plate frame by shape punching; Select 0.4mm thickness terylene (PET) mesh grid, be cut into dividing plate net by shape punching; Dividing plate frame and dividing plate net are stacked together, put into hot pressing equipment and carry out hot pressing.Temperature is 105 DEG C.Pressure is 25kg/cm2, and the hot pressing time was 20 seconds; By the dividing plate after hot pressing by size punching cutting edge, be prepared into available electrodialysis spacer.Block board thickness actual measurement 0.52mm.
According to the assemble method of common electric dialyzator, by the above-mentioned electrodialysis spacer be processed into 100, homogeneous ion-exchange membrane (anode membrane and cavity block) 50 is assembled into electric dialyzator to (size of dividing plate and film is 100X200mm).Water flowing, intake pressure 1.2bar, has no and leaks; Each chamber pressure difference gets 0.5bar, has no string water; Do desalination test by the NaCl solution that concentration is 2000mg/L, flow velocity gets 3cm/sec, and film gets 0.6V to voltage, and the current efficiency of test result is 82%.
Embodiment 2:
The structure identical with embodiment 1, selects 0.5mm thickness thermoplastic elastomer (TPE) (TPE), is cut into dividing plate frame by shape punching; Select 0.5mm thickness terylene (PET) mesh grid, be cut into dividing plate net by shape punching; Dividing plate frame and dividing plate net are stacked together, put into hot pressing equipment and carry out hot pressing.Temperature is 120 DEG C.Pressure is 30kg/cm2, and the hot pressing time was 10 seconds; By the dividing plate after hot pressing by size punching cutting edge, be prepared into available electrodialysis spacer.Block board thickness actual measurement 0.55mm.
According to the assemble method of common electric dialyzator, by the above-mentioned electrodialysis spacer be processed into 100, homogeneous ion-exchange membrane (anode membrane and cavity block) 50 is assembled into electric dialyzator to (size of dividing plate and film is 200X400mm).Water flowing, intake pressure 1.3bar, has no and leaks; Each chamber pressure difference gets 0.5bar, has no string water; Do desalination test by the NaCl solution that concentration is 3000mg/L, flow velocity gets 4cm/sec, and film gets 0.8V to voltage, and the current efficiency of test result is 85%.
Embodiment 3:
The structure identical with embodiment 1, selects 0.5mm thickness thermoplastic elastomer (TPE) (TPE), is cut into dividing plate frame by shape punching; Select 0.3mm thickness terylene (PET) mesh grid, be cut into dividing plate net by shape punching; Dividing plate frame and dividing plate net are stacked together, put into hot pressing equipment and carry out hot pressing.Temperature is 100 DEG C.Pressure is 40kg/cm2, and the hot pressing time was 15 seconds; By the dividing plate after hot pressing by size punching cutting edge, be prepared into available electrodialysis spacer.Block board thickness actual measurement 0.46mm.
According to the assemble method of common electric dialyzator, by the above-mentioned electrodialysis spacer be processed into 100, homogeneous ion-exchange membrane (anode membrane and cavity block) 50 is assembled into electric dialyzator to (size of dividing plate and film is 400X800mm).Water flowing, intake pressure 1.5bar, has no and leaks; Each chamber pressure difference gets 0.5bar, has no string water; Do desalination test by the NaCl solution that concentration is 5000mg/L, flow velocity gets 5cm/sec, and film gets 0.7V to voltage, and the current efficiency of test result is 87%.
Although specifically show in conjunction with preferred embodiment and describe the present invention; but those skilled in the art should be understood that; not departing from the spirit and scope of the present invention that appended claims limits; can make a variety of changes the present invention in the form and details, be protection scope of the present invention.
Claims (10)
1. a homogeneous membrane electrodialysis spacer, is characterized in that: be made up of dividing plate frame and dividing plate net, and described dividing plate frame is thermoplastic elastomer (TPE), and dividing plate net is terylene net, presses together after high-temperature heating is crossed by dividing plate frame and dividing plate Netcom.
2. a kind of homogeneous membrane electrodialysis spacer according to claim 1, is characterized in that: described thermoplastic elastomer (TPE) is dienes TPE, comprises the isomer of natural rubber.
3. a kind of homogeneous membrane electrodialysis spacer according to claim 2, is characterized in that: the thickness of described dienes TPE is 0.2mm-0.6mm, and color is Transparent color.
4. a kind of homogeneous membrane electrodialysis spacer according to claim 1, is characterized in that: described terylene net is mesh grid.
5. a kind of homogeneous membrane electrodialysis spacer according to claim 4, is characterized in that: the thickness of described mesh grid is 0.2mm-0.6mm, and mesh size is 0.2-0.3mm.
6. a kind of homogeneous membrane electrodialysis spacer according to claim 1, is characterized in that: described electrodialysis spacer is also provided with circular water distributing pore and net formula cloth tank, and electrodialysis spacer takes without dead angle runner design.
7. a kind of homogeneous membrane electrodialysis spacer according to claim 1, is characterized in that: the thickness of described electrodialysis spacer is 0.4mm-0.6mm.
8. a homogeneous membrane electrodialysis spacer preparation method, is characterized in that: comprise the following steps: 1, dividing plate frame, dividing plate net are cut into required form respectively; 2, the dividing plate frame cut and dividing plate net are stacked together, shaping with hot pressing equipment hot pressing; 3, punching, cutting edge, directly form a dividing plate.
9. a kind of homogeneous membrane electrodialysis spacer preparation method according to claim 8, it is characterized in that: in hot pressing process, mode of heating is electrical heating, and heating-up temperature is 80-180 DEG C.
10. a kind of homogeneous membrane electrodialysis spacer preparation method according to claim 8, is characterized in that: pressure during pressing is 20-80kg/cm2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510496292.7A CN105169950A (en) | 2015-08-14 | 2015-08-14 | Electrodialysis separation plate for homogeneous membrane and preparation method thereof |
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| CN201510496292.7A CN105169950A (en) | 2015-08-14 | 2015-08-14 | Electrodialysis separation plate for homogeneous membrane and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107213794A (en) * | 2017-07-03 | 2017-09-29 | 丁武龙 | A kind of Efficient Conversion electric drive film device |
| CN109052745A (en) * | 2018-07-14 | 2018-12-21 | 浙江大维高新技术股份有限公司 | A kind of easy fouling tendency Waste water concentrating decrement method |
| CN110576663A (en) * | 2019-10-15 | 2019-12-17 | 厦门德菲尔特新材料有限公司 | Three-layer co-extrusion material layer and preparation method thereof |
| CN111001300A (en) * | 2019-12-31 | 2020-04-14 | 佛山市云米电器科技有限公司 | Preparation method of high-sealing-performance electrodialysis membrane stack |
| CN111905569A (en) * | 2020-08-18 | 2020-11-10 | 巨轮智能装备股份有限公司 | Continuous manufacturing method of partition board for electrodialysis membrane stack |
| CN114804496A (en) * | 2021-05-13 | 2022-07-29 | 上海清如环保科技有限公司 | Recycling treatment process and device for aluminum foil corrosion waste acid |
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| CN2195375Y (en) * | 1994-05-26 | 1995-04-26 | 奚凤翔 | Equality phase ionic exchange diaphragm electric dialyzer |
| CN103816806A (en) * | 2014-01-26 | 2014-05-28 | 浙江工商大学 | Electrodialysis partitioning plate |
| CN103889557A (en) * | 2011-10-28 | 2014-06-25 | Agc工程株式会社 | Method for producing dialysis tank chamber frame |
| JP2015037761A (en) * | 2011-11-24 | 2015-02-26 | 株式会社アストム | Gasket spacer used for electrodialyzer |
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Patent Citations (5)
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| US5185048A (en) * | 1990-05-15 | 1993-02-09 | Eurodia S.A. | Method of manufacturing a separator frame for a stack in an exchanger device |
| CN2195375Y (en) * | 1994-05-26 | 1995-04-26 | 奚凤翔 | Equality phase ionic exchange diaphragm electric dialyzer |
| CN103889557A (en) * | 2011-10-28 | 2014-06-25 | Agc工程株式会社 | Method for producing dialysis tank chamber frame |
| JP2015037761A (en) * | 2011-11-24 | 2015-02-26 | 株式会社アストム | Gasket spacer used for electrodialyzer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107213794A (en) * | 2017-07-03 | 2017-09-29 | 丁武龙 | A kind of Efficient Conversion electric drive film device |
| CN109052745A (en) * | 2018-07-14 | 2018-12-21 | 浙江大维高新技术股份有限公司 | A kind of easy fouling tendency Waste water concentrating decrement method |
| CN109052745B (en) * | 2018-07-14 | 2021-03-09 | 浙江大维高新技术股份有限公司 | Concentration and reduction method for easily-scaling wastewater |
| CN110576663A (en) * | 2019-10-15 | 2019-12-17 | 厦门德菲尔特新材料有限公司 | Three-layer co-extrusion material layer and preparation method thereof |
| CN111001300A (en) * | 2019-12-31 | 2020-04-14 | 佛山市云米电器科技有限公司 | Preparation method of high-sealing-performance electrodialysis membrane stack |
| CN111001300B (en) * | 2019-12-31 | 2022-03-25 | 广东栗子科技有限公司 | Preparation method of high-sealing-performance electrodialysis membrane stack |
| CN111905569A (en) * | 2020-08-18 | 2020-11-10 | 巨轮智能装备股份有限公司 | Continuous manufacturing method of partition board for electrodialysis membrane stack |
| CN114804496A (en) * | 2021-05-13 | 2022-07-29 | 上海清如环保科技有限公司 | Recycling treatment process and device for aluminum foil corrosion waste acid |
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