CN202030567U - Electrodeionization system without ion exchange membrane - Google Patents
Electrodeionization system without ion exchange membrane Download PDFInfo
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- CN202030567U CN202030567U CN2011200510951U CN201120051095U CN202030567U CN 202030567 U CN202030567 U CN 202030567U CN 2011200510951 U CN2011200510951 U CN 2011200510951U CN 201120051095 U CN201120051095 U CN 201120051095U CN 202030567 U CN202030567 U CN 202030567U
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- electrode
- porous
- floating block
- ion
- ion exchange
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Abstract
The utility model discloses an electrodeionization system without an ion exchange membrane. A porous water distribution plate, an upper electrode, ion exchange resin, a lower electrode and a porous floating block are mounted in an insulating cavity from the top down in sequence, wherein the density of the porous floating block is smaller than that of water; a top cover and the upper end of a cylindrical housing are sealed by an upper seal ring; a bottom cover and the lower end of the cylindrical housing are sealed by a lower seal ring; the porous water distribution plate and the upper electrode are fixed between the top cover and the end surface of the cylindrical housing; the lower electrode is fixed on the porous floating block; a middle seal ring is mounted between the porous floating block and the cylindrical housing; and the upper and the lower electrodes are respectively connected with a high-voltage direct current supply. The utility model solves the problems that in the electrodeionization, the ion exchange membrane is subject to contamination, concentration polarization, scale formation and hydroxid precipitation on the surface in treating heavy metal wastewater containing Cu2+, Ni2+ and other ions. The electrodeionization system is suitable for high purity water preparation, purification of electroplating and rinsing wastewater containing heavy metal ions, and treatment of water and wastewater considering ionic impurities removal as the purpose.
Description
Technical field
The utility model relates to a kind of electrodeionization system, especially relates to a kind of electrodeionization system that does not have ion-exchange membrane.
Technical background
(Electrodeionization is a kind of power consumption that only needs EDI), and need not the environmentally friendly deionization process of chemical agent consumption electrodeionization.With ion-exchange, reverse osmosis, nanofiltration, electrodialysis, distillation, capacitive deionization (Capacitive deionization, CDI) etc. method is compared, EDI possesses processing efficiency height, environmental friendliness, outstanding advantage such as easy and simple to handle simultaneously, therefore has the favorable industrial application prospect in the processing of water purification preparation and heavy metal wastewater thereby.Nowadays, EDI has been used for the preparation of high purity water in industries such as medicine, electric power, semi-conductor, chemical agent production, bag and bottle.Its effluent quality can reach the level of tradition " mix bed ", even more excellent, this be reverse osmosis, electrodialysis and development in recent years other environmentally friendly methods such as CDI of getting up can't reach.
Though EDI has processing efficiency height, environmental friendliness, outstanding advantage such as easy and simple to handle, also has some big defectives at present.At first, in fact conventional EDI is equivalent to a kind of electrodialysis of filling ion-exchanger in freshwater room, needs to use a large amount of ion-exchange membranees, and film cost height is made and changed to its apparatus structure complexity, and I﹠M is inconvenience very.Again one, some problems relevant with ion-exchange membrane appear in conventional EDI regular meeting in operational process, and for example: film pollution, concentration polarization, fouling and processing contain Cu
2+, Ni
2+Form precipitation of hydroxide on the film surface during isoionic heavy metal wastewater thereby.Above-mentioned defective has had a strong impact on applying of EDI.
Summary of the invention
In order to overcome existing problem in the background technology, the purpose of this utility model is to provide a kind of electrodeionization system that need not to use ion-exchange membrane, is used for the ion of the dried up or waste water of branch.
The technical solution adopted in the utility model is:
One, a kind of electric deionizing method that does not have ion-exchange membrane:
At the two ends of resin layer a pair of anodic-cathodic is installed; Take exchange to handle and electricity regeneration alternate operation; Utilize high voltage direct current promote on the ion-exchange resin particles interface water power from, produce a large amount of H
+With OH
-Ion; Utilize the H that is produced again
+Or OH
-The ion exchange resin that ion pair lost efficacy is regenerated, and makes it be converted into RH type or ROH type; At electric regenerated simultaneously, by the current of continuous flow in the ion exchange resin gap, make the ion that is reproduced discharge.
Two, a kind of electrodeionization system that does not have ion-exchange membrane:
The utility model is by the top cover that has interface, in the insulation cavity that cylindrical case and the bottom that has a lower interface surround, lay the porous water distribution board from top to bottom successively, top electrode, ion exchange resin, lower electrode and density are less than the porous floating block of water, use the sealing-ring sealing between top cover and the cylindrical case upper surface, seal with lower seal between bottom and the cylindrical case lower surface, porous water distribution board and top electrode are fixed between top cover and the cylindrical case end face, lower electrode is fixed on the porous floating block, between porous floating block external cylindrical surface and the cylindrical case inner cylinder face middle sealing-ring is installed, lower electrode can slide by easy on and off with the porous floating block, and top electrode and lower electrode connect high-voltage DC power supply respectively.
In described top electrode and the lower electrode one of them is anode, and another is a negative electrode; Two electrodes adopt the microporous mesh electrode of hole dimension less than the ion-exchange resin particles particle diameter; Or adopt the mesh electrode of hole dimension, but the filtering net of 1 ~ 2 layer of aperture less than the ion-exchange resin particles particle diameter will added respectively between top electrode and the porous water distribution board and between lower electrode and the porous floating block greater than the resin particle particle diameter.
Described ion exchange resin is negative and positive mixture iron exchange resin, amphoteric ion exchange resin, single Zeo-karb or single anionite-exchange resin.
Take exchange to handle and electricity regeneration alternate operation.During processing, as common ion-exchange, rely on the strong exchange adsorptive power of ion exchange resin to make a return journey to dewater with waste water in the ionic state material.During regeneration, resin layer is applied strong direct current, impel ion-exchange equilibrium significantly to move towards the direction of regenerative response with this; Meanwhile, lead to pure water to resin from bottom to top with high flow velocities continuously, whole resinbed and lower electrode are all held up, and make that two electrodes keep closely contacting with resinbed up and down.Like this, just as the adverse current chemical regeneration, the ion that is adsorbed in the resin will be from the inner fast steering current of resin, and the yin, yang resin is gradated along the direction of stream of regenerant water becomes ROH and RH type; On the other hand, after stream of regenerant water is admitted born again ion, concentration will constantly raise, the final no film electrodeionization of form discharge system with concentrated solution.
The beneficial effect that the utlity model has is:
1) no ion-exchange membrane does not have any other separator that function is similar to ion-exchange membrane yet, and is simple in structure.
2) overcome existing electrodeionization effectively and contained Cu because of film pollution, concentration polarization, fouling and the processing of adopting ion-exchange membrane to exist
2+, Ni
2+Form problems such as precipitation of hydroxide on the film surface during isoionic heavy metal wastewater thereby.
The utility model is applicable to that high purity water preparation, electroplate rinsing etc. contain the purification of waste water of heavy metal ion and other are the processing of the water and the waste water of purpose to remove ionic impurity.
Description of drawings
Fig. 1 is the utility model process principle figure.
Fig. 2 is the A-A sectional view of Fig. 1.
Among the figure: 1. go up interface, 2. top cover is 3. gone up sealing-ring, 4. cylindrical case, 5. in sealing-ring, 6. lower seal, 7. bottom, 8. porous water distribution board, 9. top electrode, 10. resinbed, 11. lower electrode, 12. porous floating blocks, 13. lower interfaces, 14. high-voltage DC power supplies.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1 and Figure 2, in the insulation cavity that the utility model is surrounded by top cover 2 that has interface 1, cylindrical case 4 and the bottom 7 that has lower interface 13, lay porous water distribution board 8, top electrode 9, ion exchange resin 10, lower electrode 11 and the porous floating block 12 of density from top to bottom successively less than water, use sealing-ring 3 sealings between top cover 2 and cylindrical case 4 upper surfaces, seal with lower seal 6 between bottom 7 and cylindrical case 4 lower surfaces, porous water distribution board 8 and top electrode 9 are fixed between top cover 2 and cylindrical case 4 end faces, and dismounting flexibly.Lower electrode 11 is fixed on the porous floating block 12, dismounting equally flexibly.Sealing-ring 5 in being equipped with between porous floating block 12 external cylindrical surfaces and cylindrical case 4 inner cylinder faces, tightness is moderate, so that can hold back ion exchange resin effectively, lower electrode 11 is slided with porous floating block 12 easy on and off, top electrode 9 connects high-voltage DC power supply 14 respectively with lower electrode 11, and voltage of supply is relevant with used resin kind with the resin layer height.
In described top electrode 9 and the lower electrode 11 one of them is anode, and another is a negative electrode; Two electrodes adopt the microporous mesh electrode of hole dimension less than ion exchange resin 10 grain diameters; Or the employing hole dimension is greater than the mesh electrode of resin 10 grain diameters, but will be respectively adding the filtering net of 1 ~ 2 layer of aperture between top electrode 9 and the porous water distribution board 8 and between lower electrode 11 and the porous floating block 12, so that can hold back ion exchange resin effectively less than ion exchange resin 10 grain diameters.
Described ion exchange resin 10 is generally the negative and positive mixture iron exchange resin but also can be amphoteric ion exchange resin as required, or single Zeo-karb, or single anionite-exchange resin.
Processing of the present utility model and regenerative process are as follows:
During processing, processed water or waste water flow into from last interface 1, through passing top electrode 9 behind porous water distribution board 8 water distributions, enter resinbed 10 then, porous floating block 12, lower electrode 11 can glide voluntarily with resin layer 10 under flow action, touch bottom 7 until porous floating block 12 bottoms; Under the effect of ion exchange resin 10, processed water or the ionic state material in the waste water are removed effectively; Water after the purification passes through lower electrode 11 and porous floating block 12 more successively, is finally flowed out by lower interface 13.
During regeneration, be used for the regenerated pure water and flow into from lower interface 13, under flow action, resinbed 10, lower electrode 11 and porous floating block 12 are held up together; The upper end of resin layer 10 and top electrode 9 applies strong direct current to resin layer 10 after closely contacting, with this promote on the ion exchange resin interface water power from, produce a large amount of H
+With OH
-Ion, and utilize the H that is produced
+Or OH
-The ion exchange resin that ion pair lost efficacy is regenerated, and makes it be converted into RH type or ROH type; Born again ion then passes through resin layer 10 with stream of regenerant water, passes through top electrode 9 and porous water distribution board 8 then successively, finally flows out from last interface 1.
Embodiment:
The two-pass reverse osmosis effluent adopting of the seawater desalination system of the about 10 μ s/cm of specific conductivity no film electrodeionization system shown in Figure 1 handles.System adopts strong acid positive resin and strong basicity negative resin, and both evenly mix mutually, and the volume ratio of positive and negative resin is 1:2, and the resin layer height is 0.16m.Operational condition is as follows: regenerative current density 280A/m
2Average voltage 340V; Stream of regenerant water speed 15 m/h; Regeneration lasts 3.6h; Handle flow velocity 15m/h.Operation result is as follows: regeneration rate 90%; The about 290 μ s/cm of the concentrated solution average conductivity that produces in the regenerative process; Go out water conductivity 0.060-0.070 μ s/cm after the processing; The water rate of recovery 97%; Energy consumption 0.22 kWh/m
3Water.
Claims (3)
1. electrodeionization system that does not have ion-exchange membrane, it is characterized in that: by the top cover that has interface (1) (2), in the insulation cavity that cylindrical case (4) and the bottom (7) that has lower interface (13) surround, lay porous water distribution board (8) from top to bottom successively, top electrode (9), ion exchange resin (10), lower electrode (11) and the porous floating block (12) of density less than water, use sealing-ring (3) sealing between top cover (2) and cylindrical case (4) upper surface, seal with lower seal (6) between bottom (7) and cylindrical case (4) lower surface, porous water distribution board (8) and top electrode (9) are fixed between top cover (2) and cylindrical case (4) end face, lower electrode (11) is fixed on the porous floating block (12), between porous floating block (12) external cylindrical surface and cylindrical case (4) inner cylinder face middle sealing-ring (5) is installed, lower electrode (11) can slide by easy on and off with porous floating block (12), and top electrode (9) connects high-voltage DC power supply (14) respectively with lower electrode (11).
2. a kind of electrodeionization system that does not have ion-exchange membrane according to claim 1 is characterized in that: one of them in described top electrode (9) and the lower electrode (11) is anode, and another is a negative electrode; Two electrodes adopt the microporous mesh electrode of hole dimension less than ion exchange resin (10) grain diameter; Or adopt the mesh electrode of hole dimension, but the filtering net of 1 ~ 2 layer of aperture less than ion exchange resin (10) grain diameter will added respectively between top electrode (9) and the porous water distribution board (8) and between lower electrode (11) and the porous floating block (12) greater than resin (10) grain diameter.
3. a kind of electrodeionization system that does not have ion-exchange membrane according to claim 1 is characterized in that: described ion exchange resin (10) is negative and positive mixture iron exchange resin, amphoteric ion exchange resin, single Zeo-karb or single anionite-exchange resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200510951U CN202030567U (en) | 2011-03-01 | 2011-03-01 | Electrodeionization system without ion exchange membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200510951U CN202030567U (en) | 2011-03-01 | 2011-03-01 | Electrodeionization system without ion exchange membrane |
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| Publication Number | Publication Date |
|---|---|
| CN202030567U true CN202030567U (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200510951U Expired - Lifetime CN202030567U (en) | 2011-03-01 | 2011-03-01 | Electrodeionization system without ion exchange membrane |
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| CN (1) | CN202030567U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153166A (en) * | 2011-03-01 | 2011-08-17 | 浙江大学 | Electrodeionization (EDI) method and system dispensing with ion exchange membranes |
| CN103723870A (en) * | 2012-12-28 | 2014-04-16 | 肖英 | Water purifying plant capable of enhancing performance of conventional water purifier |
-
2011
- 2011-03-01 CN CN2011200510951U patent/CN202030567U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153166A (en) * | 2011-03-01 | 2011-08-17 | 浙江大学 | Electrodeionization (EDI) method and system dispensing with ion exchange membranes |
| CN102153166B (en) * | 2011-03-01 | 2012-11-14 | 浙江大学 | Electrodeionization (EDI) method and system dispensing with ion exchange membranes |
| CN103723870A (en) * | 2012-12-28 | 2014-04-16 | 肖英 | Water purifying plant capable of enhancing performance of conventional water purifier |
| CN103723868A (en) * | 2012-12-28 | 2014-04-16 | 肖英 | Water purifier |
| CN103721886A (en) * | 2012-12-28 | 2014-04-16 | 肖英 | Ultrasonic nebulizer |
| CN103723869A (en) * | 2012-12-28 | 2014-04-16 | 肖英 | Water purifier for shower |
| CN103723868B (en) * | 2012-12-28 | 2015-07-15 | 肖英 | Water purifier |
| CN103723869B (en) * | 2012-12-28 | 2015-09-30 | 肖英 | Water cleaner for shower |
| CN103723870B (en) * | 2012-12-28 | 2016-06-15 | 肖英 | Improve the purifier of normal purifier performance |
| CN103721886B (en) * | 2012-12-28 | 2016-08-17 | 肖英 | Soniclizer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111109 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |