CN1306882A - Electric dialyzer with cross-flow filling bed - Google Patents
Electric dialyzer with cross-flow filling bed Download PDFInfo
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- CN1306882A CN1306882A CN 00111653 CN00111653A CN1306882A CN 1306882 A CN1306882 A CN 1306882A CN 00111653 CN00111653 CN 00111653 CN 00111653 A CN00111653 A CN 00111653A CN 1306882 A CN1306882 A CN 1306882A
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Abstract
The present invention provides the electric dialyzer heterogeneous ion exchange membrane, improved water distributing partition, improved filling mode and different flow direction of material water and pure water. In the said dialyzer, some heterogeneous ion exchange membrane with poor use effect in conventional filling bed electric dialyzer can be used normally to produce high quality pure water.
Description
The present invention relates to a kind of water treatment facilities of handling industry water, refer to a kind of filling bed electrodialyzer that industry water is used of handling especially.
Filling bed electrodialyzer (hereinafter to be referred as EDI) begins one's study in the sixties in the world, and the early 1990s announces that just a kind of latest model that reaches industrialized level is exclusively used in the Treatment of Industrial Water equipment that high purity water is made.
Filling bed electrodialyzer (EDI) is the infrastructure device unit with two kinds of traditional industry water treatments: be used for high purity water and make mixed ion exchanger and the electric dialyzator that is used for pre-desalting process, a kind of electric regenerative mixed ion-exchange unit that mutually combines and create is also referred to as electric deionization plant.
The basic functional principle of filling bed electrodialyzer (EDI) is: utilize the H that polarization phenomena produce in the electrodialytic process
+And OH
-The mixture iron exchange resin that ion pair is filled in the electrodialysis compartment is regenerated, and makes the mixture iron exchange resin that is filled in the electrodialysis compartment can finish absorption, exchange, migration and regenerative process to solion continuously; Thereby make the manufacturing production process of the batch (-type) ion exchange pure water that in the past relies on chemical reagent regeneration, become the continuous flow procedure that relies on electricity regeneration; Not only reduced the manufacturing cost of high purity water significantly; and owing to no longer rely on chemical reagent regeneration to avoid the problem of environmental pollution in the regenerative process therefore; the suitability for industrialized production of filling bed electrodialyzer is not only the great innovation of Treatment of Industrial Water equipment, also is the innovation of the environmental protectionization of Treatment of Industrial Water equipment.
For filling bed electrodialyzer, in theory, amberplex is the critical material of decision filling bed electrodialyzer performance, and therefore external commercialization filling bed electrodialyzer all is to be succeeded in developing by the country with high-performance amberplex production capacity.The high-performance amberplex that is generally used for filling bed electrodialyzer in the world is meant the homogeneous ion-exchange membrane of low ions diffusion.And China only possesses the production capacity of the relatively poor heterogeneous ion-exchange membrane of ions diffusion at present.
The main cause that heterogeneous ion-exchange membrane is unsuitable for making filling bed electrodialyzer is because the heterogeneous ion-exchange membrane structure is comparatively loose, when film both sides solution concentration differs big, the ions diffusion phenomenon will occur, make the contrary direction of an electric field of ion of concentrated solution side carry out ions diffusion to the weak solution side; The result uses heterogeneous ion-exchange membrane to be difficult to produce the filling bed electrodialyzer of function admirable, can't realize the production of high purity water.
In filling bed electrodialyzer, use homogeneous ion-exchange membrane in the world, industrial manufacturing cost height, suitability for industrialized production technical difficulty are big, China does not just possess the homogeneous ion-exchange membrane of manufacturing technology at present, if use the homogeneous ion-exchange membrane of import, the filling bed electrodialyzer cost is improved greatly and can't be accepted by market.Although and its price of heterogeneous ion-exchange membrane of using low cost of manufacture only is 1/10 of homogeneous ion-exchange membrane price,, himself performance is difficult to performance owing to making the filling bed electrodialyzer premium properties.
In view of the existing defective of existing filling bed electrodialyzer, the object of the present invention is to provide a kind of electric dialyzer with cross-flow filling bed (Stagger Flow Type Electrodeionization) that can produce the use heterogeneous ion-exchange membrane of high purity water.
Technical scheme of the present invention is: change conventional filling bed electrodialyzer (EDI) into electric dialyzer with cross-flow filling bed (being designated hereinafter simply as SF-EDI), traditional electrical dialysis technical process and foundation structure are improved; At first transform the redesign by foundation structure of the technical process of dense in traditional electrodialysis plant, fresh water co-flow as dense, the incorgruous mobile technical process of fresh water with adjusting, solved that electrodialysis desalination process flow length is directly proportional with concentration difference dense, fresh water, the further phenomenon of raising of the high degree of purification of concentration difference diffusion phenomena restriction water; Next changes the water supply modes in the traditional electrical dialysis technical process, transform homology water supply modes dense, fresh water as the allos water supply modes, and requires dense water feedwater water quality must not be lower than the product water quality of fresh water, and the feed pressure of dense water is lower than the discharge pressure of fresh water.Thereby eliminated the ions diffusion phenomenon that causes because of concentration difference to greatest extent.
Electric dialyzer with cross-flow filling bed of the present invention, flowing of dense water, fresh water flowed for incorgruous, intakes to be intake respectively by both-end for dense, fresh water, and draining then be that dense, fresh water is distinguished draining by both-end, and flow control system is arranged on the fresh water drain-side.For realizing that dense water feedwater water quality must not be lower than the product water quality of fresh water, the intake pressure of dense water must not be higher than the requirement of the discharge pressure of fresh water, and its structure is improved simultaneously; A, routine use the water distribution block board thickness of the electric dialyzator of heterogeneous ion-exchange membrane to be 0.5-1.0mm, and the water distribution block board thickness that uses the filling bed electrodialyzer of homogeneous ion-exchange membrane is 10-20mm, and the present invention transform it as high-elastic sealing water distribution dividing plate, thickness is 1.0-9.0mm, B, uses the filling mode of the filling bed electrodialyzer of homogeneous ion-exchange membrane to transform it as yin and yang resin as the hybrid resin filling mode usually to carry out layering respectively and fill.C, common control pressurer system are controlled by influent side, change control pressurer system into and control simultaneously for water inlet, drain-side.Adopt the electric dialyzer with cross-flow filling bed of this structure, use heterogeneous ion-exchange membrane can give full play to the premium properties of filling bed electrodialyzer, produce the high-quality pure water.
Experimental result shows: the every performance indications of production pure water of electric dialyzer with cross-flow filling bed are all suitable with the filling bed electrodialyzer (EDI) that uses homogeneous ion-exchange membrane.
The performance indications contrast:
Annotate: (1) equipment water inlet index (2) equipment produces the water index
| The contrast project | Ion-exchange process | ????EDI | ????SF-EDI | |||
| ????20℃ | 1 | ????2 | ????1 | ????2 | ????1 | ????2 |
| Resistivity M Ω-cm | 0.01 | ???1-5 | ???0.1 | ?1-10 | ?0.01 | 1-5 |
| Total hardness mge/l | ＜1 | Conventional detection is zero | ?＜0.1 | Conventional detection is zero | ＜0.2 | Conventional detection is zero |
| Na +mge/l | 1～10 | ?＜1 | 0.3～10 | |||
| Fe +2??mg/l | ＜3 | ?＜1 | ＜3 | |||
| CL????mg/l | ＜0.5 | ?＜0.1 | ＜0.2 | |||
| SO 4 -2?mge/l | ＜5 | ?＜0.5 | 0.5～2 | |||
| TOC???mge/l | ＜1 | ?＜0.1 | ＜0.5 | |||
| Si????mg/l | 1～20 | ＜5 | ?1～20 | ＜0.2 | 1～20 | ＜0.2 |
| The operation pattern | Manual. complexity | Automatically. simple | Automatically. simple | |||
| The regeneration pattern | Chemical reagent | Electricity | Electricity | |||
| The operation pattern | Production-regeneration-production | Continuously. stable | Continuously. stable | |||
| Environmental pollution | Have | Do not have | Do not have | |||
| Operating cost | High | Low | Low | |||
| Equipment investment | Low | High | In | |||
By last correction data as can be known: SF-EDI has had the fundamental characteristics of EDI, in every technical indicator water supply quality is required to be lower than EDI, therefore compare with EDI, SF-EDI has better practicality, the investment of its preliminary treatment corollary system is also just relatively low, also just has more the market competitiveness.
Now further describe the present invention in conjunction with the embodiments.
Fig. 1 is conventional filling bed electrodialyzer technical process schematic diagram.
Fig. 2 is conventional filling bed electrodialyzer concentration difference gradient schematic diagram.
Fig. 3 is an electric dialyzer with cross-flow filling bed process flow diagram of the present invention.
Fig. 4 is an electric dialyzer with cross-flow filling bed concentration difference gradient schematic diagram of the present invention.
C
AIon concentration 1-water source ,-enriched chamber
Co-diluting compartment ion concentration 2-water source
*-anion 11-density wastewater during drainage position
O-cation 12-product pure water drainage position
-ion migratory direction
Embodiment 1
As Fig. 3, shown in 4, adopt dense, fresh water cross-current type flow process, select one of the filling bed electrodialyzer of the heterogeneous ion-exchange membrane of 450 * 450mm for use, high-elastic sealing water distribution block board thickness is about 4mm, EDI resin filling mode is that sun-cloudy layering is filled, controlling dense hydroecium is 1ppm to water concentration, dense hydroecium feed pressure 0.1Mpa, 22 ℃ of temperature, water inlet flow velocity 3cm/sec, water inlet is for containing the water of 100ppm (NaCl), and film is to voltage 1.5V, and freshwater room is intake pressure 0.12Mpa outward, water inlet is intake respectively for two ends, be water source 1 and water source 2 water inlets, product pure water drainage position 12 and density wastewater during drainage position 11 are passed through in draining respectively, and are provided with the flow-control meter before 12 drainings of product pure water drainage position.The desalination fresh water (salt rejection rate is 99%) that under above-mentioned process conditions, is 1.30ppm by the prepared product water of cross-current type filled type electric dialyzator of the present invention.
Embodiment 2
Take the process conditions operating condition identical with embodiment 1, just the high-elastic sealing water distribution of EDI block board thickness is 8mm, and flow process length is adjusted into the filling bed electrodialyzer of the heterogeneous ion-exchange membrane of 780cm.Former water is 5ppm to water concentration, and resistance value is about 100K Ω/cm
2, be 0.7ppm (NaCl) by the prepared product water of cross-current type filled type electric dialyzator of the present invention, resistance value is about 1200K Ω/cm
2
Claims (6)
1, a kind of electric dialyzer with cross-flow filling bed includes heterogeneous ion-exchange membrane, it is characterized in that, flowing of its dense water, fresh water flowed for incorgruous.
2, electric dialyzer with cross-flow filling bed according to claim 1 is characterized in that: its water inlet is intake respectively by both-end for dense water, fresh water; Its draining is that dense water, fresh water are by both-end draining respectively.
3, electric dialyzer with cross-flow filling bed according to claim 1 and 2 is characterized in that: dense water influent quality must not be lower than the product water quality of fresh water, and the intake pressure of dense water must not be higher than the discharge pressure of fresh water.
4, electric dialyzer with cross-flow filling bed according to claim 1 is characterized in that: its water distribution dividing plate is high-elastic sealing water distribution dividing plate, and thickness is 1-9mm.
5, electric dialyzer with cross-flow filling bed according to claim 1 is characterized in that: its resin filling mode is the layering filling respectively of positive negative resin.
6, electric dialyzer with cross-flow filling bed according to claim 1 is characterized in that: flow control system is arranged on the fresh water drainage position, and water inlet, draining are provided with control pressurer system simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00111653 CN1119197C (en) | 2000-02-03 | 2000-02-03 | Electric dialyzer with cross-flow filling bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00111653 CN1119197C (en) | 2000-02-03 | 2000-02-03 | Electric dialyzer with cross-flow filling bed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1306882A true CN1306882A (en) | 2001-08-08 |
| CN1119197C CN1119197C (en) | 2003-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00111653 Expired - Fee Related CN1119197C (en) | 2000-02-03 | 2000-02-03 | Electric dialyzer with cross-flow filling bed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115772A (en) * | 2020-02-27 | 2020-05-08 | 佛山市顺德区美的饮水机制造有限公司 | Waterway system and water purifying equipment |
-
2000
- 2000-02-03 CN CN 00111653 patent/CN1119197C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115772A (en) * | 2020-02-27 | 2020-05-08 | 佛山市顺德区美的饮水机制造有限公司 | Waterway system and water purifying equipment |
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| Publication number | Publication date |
|---|---|
| CN1119197C (en) | 2003-08-27 |
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