CN100372598C - Continuous electrodeionization device - Google Patents
Continuous electrodeionization device Download PDFInfo
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- CN100372598C CN100372598C CNB2006100762621A CN200610076262A CN100372598C CN 100372598 C CN100372598 C CN 100372598C CN B2006100762621 A CNB2006100762621 A CN B2006100762621A CN 200610076262 A CN200610076262 A CN 200610076262A CN 100372598 C CN100372598 C CN 100372598C
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- hydroecium
- freshwater room
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- 238000009296 electrodeionization Methods 0.000 title description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 163
- 239000013505 freshwater Substances 0.000 claims abstract description 149
- 238000009826 distribution Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 23
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 63
- 238000007789 sealing Methods 0.000 claims description 26
- 239000000945 filler Substances 0.000 claims description 21
- 238000005341 cation exchange Methods 0.000 claims description 16
- 239000012528 membrane Substances 0.000 claims description 16
- 239000011347 resin Substances 0.000 abstract description 45
- 229920005989 resin Polymers 0.000 abstract description 45
- 238000011049 filling Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 6
- 238000002242 deionisation method Methods 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 description 30
- 239000003456 ion exchange resin Substances 0.000 description 27
- 229920003303 ion-exchange polymer Polymers 0.000 description 27
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 26
- 239000003011 anion exchange membrane Substances 0.000 description 14
- 230000005012 migration Effects 0.000 description 13
- 238000013508 migration Methods 0.000 description 13
- 150000001450 anions Chemical class 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 10
- -1 sulfate radical Chemical class 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 7
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 6
- 239000002585 base Substances 0.000 description 6
- 229910001424 calcium ion Inorganic materials 0.000 description 6
- 150000001768 cations Chemical class 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 5
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 229910001425 magnesium ion Inorganic materials 0.000 description 5
- 239000003014 ion exchange membrane Substances 0.000 description 4
- 230000008520 organization Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 3
- 238000010612 desalination reaction Methods 0.000 description 3
- 238000005342 ion exchange Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000005349 anion exchange Methods 0.000 description 2
- 239000003957 anion exchange resin Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000003411 electrode reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000004382 potting Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 102000010637 Aquaporins Human genes 0.000 description 1
- 108010063290 Aquaporins Proteins 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical group [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 150000007516 brønsted-lowry acids Chemical class 0.000 description 1
- 150000007528 brønsted-lowry bases Chemical class 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005370 electroosmosis Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
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- 230000000630 rising effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
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- 230000003685 thermal hair damage Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The present invention discloses a plate-frame type continuous electric deionization device. One side of a chamber working region (27) of fresh water is provided with a fresh water chamber opening (21) which is communicated with the chamber working region (27), wherein the opening forms a filling opening which is used for filling or replacing ion guide materials to the working region of fresh water and the filling opening is covered by a sealed baffle plate. In addition, both opposite sides which extend parallel to the direction of a fresh water flow of a working region of a concentrated water chamber are respectively provided with a water inlet (25) of the concentrated water chamber and a water outlet (26) of the concentrated water chamber, wherein the water inlet of the concentrated water chamber and the water outlet of the concentrated water chamber extend in a direction which is parallel to the flow direction of the fresh water. The present invention is convenient to fill and replace resin at an application site, and the filling scale of the resin can be conveniently adjusted, which prevents sealed problems caused by resin granules. The concentrated water and the fresh water can be guaranteed to flow in a cross-flow method, which enables the flow distribution of the concentrated water to be equalized.
Description
Technical field
The present invention relates to a kind of electric deionizer, the ion that utilizes that particularly has the plate and frame assembly selects electro-osmosis to remove the device of the intermediate ion that anhydrates.
Background technology
The continuous electric desalination technology claims electrodeionization technology (electrodeionization again, hereinafter referred EDI technology) but be the acting in conjunction that utilizes sub-material of diversion (as ion exchange resin and amberplex) and electric current, a kind of technology that convection cell intermediate ion attitude or ionizable species (impurity) separate.Because the EDI assembly in use, do not need acid-alkali regeneration, produce water water quality and can meet or exceed the water quality that ion-exchange can reach, and the product water quality stabilizing can continued operation, and plant area is less than ion-exchange, do not need to handle advantages such as spent acid alkali, make the field at pure water and ultra-pure water, the EDI technology has replaced ion exchange technique gradually, is widely used in fields such as semiconductor, electronics, electric power, petrochemical industry, medicine, food.
Existing typical EDI assembly as shown in Figure 1, electrode comprises anode 1 and negative electrode 2, be one or more desalinations unit of being separated out of anion-exchange membrane 3 and cation-exchange membrane 4 by two class amberplexes between electrode or claim freshwater room 5 that the unit that forms between the freshwater room 5 is called dense hydroecium 6.Two dense water units near anode 1, negative electrode 2 are called anode hydroecium 7a, negative electrode hydroecium 7b respectively respectively.Cation-exchange membrane 4 and anion-exchange membrane 3 these two kinds of films have the selection permeability, and 4 of cation-exchange membranes allow cation to pass through, and 3 of anion-exchange membranes only allow anion to pass through.At 1,2 at two electrodes, two kinds of amberplexes are the mode of replacing and arrange.In freshwater room 5, cation-exchange membrane 4 is positioned at negative electrode 2 one sides, and anion-exchange membrane 3 is positioned at anode 1 one sides.In dense hydroecium 6, cation-exchange membrane 4 is positioned at anode 1 one sides, and anion-exchange membrane 3 is positioned at negative electrode 2 one sides.But in freshwater room 5, dose the sub-material 8 of diversion, as ion exchange resin.In dense hydroecium 6 and utmost point hydroecium 7, but the sub-material of diversion can be dosed, also inert material such as plastic grid can be filled.
When using the EDI assembly, on direction, apply DC current perpendicular to amberplex, see Fig. 2.Ion in freshwater room 5 current, at first exchange with ion exchange resin 8, exchange to the ion on the ion exchange resin 8, under the effect of electric current, move to two electrodes, 1,2 directions respectively, cation is finally moved to cation-exchange membrane 4 and by this film, is entered into adjacent dense hydroecium 6 to the migration of negative electrode 2 directions; The migration of anion anode 1 direction finally enters into adjacent dense hydroecium 6 by anion-exchange membrane 3.The ion that enters dense hydroecium 6 will continue to move to electrode 1 direction under the effect of electric current, because the selection permeability of amberplex, see through cation-exchange membrane 4 and can be blocked by the anion-exchange membrane 3 of dense hydroecium 6 opposite sides, and can not come back in the freshwater room 5 from the cation that freshwater room 5 enters into dense hydroecium 6; Similarly, the anion that enters into dense hydroecium 6 through anion-exchange membrane 3 can be blocked by the cation-exchange membrane 4 of dense hydroecium 6 opposite sides, can not come back in the freshwater room 5.Enter into the ion of dense hydroecium 6, can be moved out of the EDI assembly along with dense water current.So just reached desalination to fresh water in the freshwater room.
Ion exchange resin at the interface with resin and film at the interface, cracking reaction can take place in hydrone under the effect of certain voltage, generated hydrogen ion and hydroxide ion.Hydrogen ion that is generated and hydroxide ion can play palingenesis to the ion exchange resin in the freshwater room 58.Therefore, EDI does not need to add in addition bronsted lowry acids and bases bronsted lowry ion exchange resin is regenerated.
The EDI assembly is divided into plate and frame and spiral wound two classes.Plate and frame EDI also claims stacked, and its design is that electrode, amberplex, freshwater room, dense hydroecium and utmost point hydroecium are stacked together in parallel plane mode, constitutes the EDI assembly of one or more freshwater rooms.The detailed description of this respect is seen patent documentation such as US4632745, US4925541, US5211823, US5316637, US5154809, US5868915 and US6235166.Spiral wound EDI will sandwich the insulation grid, constitute a dense water unit between the anion and cation exchange membrane, it is cylindric that this dense water unit is with the concentrated water collecting tube of an electrode of double as that the spiral axial centre rolls into, this cylindric film core is put into the double tubular shell of doing another electrode, and potting resin constitutes the fresh water unit between adjacent dense aquaporin.Detailed description is seen patent documentation such as CN98225671.X and US6190528.
The freshwater room of existing plate and frame EDI assembly is the plate armature that there is cavity a centre, resin is promptly dosed the middle cavity place, mainly there is following problem in it: in the component assembling process, need be to each freshwater room difference loaded resin, the assembly period of assembly is longer, and the uniformity of potting resin is difficult to guarantee; In assembling process, resin also is easy to be displaced on the sealing surface between freshwater room and dense hydroecium, causes the assembly poor sealing, also can produce film simultaneously and destroy; This resin type of feed is difficult in freshwater room to fill the ion exchange resin of different proportionings.
In the application of EDI assembly, to reduce mainly be because ion exchange resin inactivation wherein or be subjected to polluting and cause to the performance of assembly sometimes, and the other parts of assembly still can continue to use.If can particularly can change the ion exchange resin in the assembly easily, then can prolong the service life of assembly effectively in site of deployment.And traditional plate and frame EDI assembly is because the restriction of its structure, and the replacing of resin is difficulty relatively, assembly need be taken apart, and so just as re-assemblying a New Parent, obvious this operation also is not suitable for carrying out at the component application scene.
Fresh in the existing plate and frame EDI assembly and dense water current be also streamed, promptly fresh water and dense water flow to identical, as shown in Figure 2.Inlet area at freshwater room 5, at first be that high price easily removes ion such as sulfate radical, calcium ion and magnesium ion etc. are at first caught (exchange) by ion exchange resin, ion such as chlorion and sodium ion and ion exchange resin exchange at a low price then, at last, in the freshwater room water side, light current from anion such as anion and cation such as ammonium ion and ion exchange resin exchanges such as carbonate, bicarbonate radical, organosilicon.Exchange to ion on the ion exchange resin under the effect of electric current,, move to dense hydroecium 6 from freshwater room 5 by ion exchange resin and amberplex.For light current from ion, may not can from freshwater room 5, be moved out fully, enter into dense hydroecium 6, but the part be removed.In the water side of freshwater room 5, cracking reaction can take place in hydrone under the effect of electric current, produce hydrogen ion and hydroxide ion.Similarly, hydrogen ion and hydroxide ion also can be from freshwater room 5 to dense hydroecium 6 migrations under the effect of electric current.
The ion that enters into dense hydroecium 6 can continue the direction migration to electrode under the effect of electric current.In dense hydroecium 6, enter into the anion anode 1 direction migration of dense hydroecium 6 by anion-exchange membrane 3, when they arrive the cation-exchange membrane 4 of dense hydroecium 6 opposite sides, because the selective permeation of amberplex, anion can not see through cation-exchange membrane 4, therefore can not turn back to again in the freshwater room 5.Similarly, the cation that enters into dense hydroecium 6 by cation-exchange membrane 4 can be to negative electrode 2 directions migrations, when they arrive the anion-exchange membrane 3 of dense hydroecium 6 opposite sides, are blocked and can not turn back in the freshwater room 5.Like this, in the water side of assembly,, higher in the dense hydroecium 6 from anion such as sulfate ion isoconcentration that freshwater room 5 migrations are come near the part on cation-exchange membrane 4 surfaces; And in dense hydroecium 6 near the part on anion-exchange membrane 3 surfaces, cation of coming from freshwater room 5 migrations such as calcium ion and magnesium ion isoconcentration are higher.
The migration that puts on electric current on the assembly and be by ion realizes.At the assembly water inlet end, the migration ion is mainly the high price foreign ion that easily removes in the water into; And in the water side of assembly, the migration ion mainly is low price foreign ion or the luxuriant son of light current that difficulty removes, as bicarbonate radical, carbonate and organosilicon ion etc. and the hydrogen ion and the hydroxide ion that are produced by hydrone ionization.Therefore, in the dense hydroecium 6 in assembly water side,, there is more hydrogen ion to enter, and local pH value is reduced near cation-exchange membrane 4 one sides; And in dense hydroecium 6 near anion-exchange membrane 3 one sides, have more bicarbonate radical, carbonate and hydroxide ion to enter, and make this local pH value rising.
So, in the dense hydroecium 6 of EDI assembly water side, part near anion-exchange membrane 3 surfaces, hardness ions such as calcium ion and magnesium ion will with the migration hydroxide ion of coming from freshwater room 5, bicarbonate radical and carbonate plasma meet, and the result will cause in dense hydroecium 6 particularly in anion-exchange membrane 3 dense hydroecium one side generation foulings.And if generation fouling in the dense hydroecium 6 at first can make the performance of amberplex reduce, thereby influence the desalting performance of assembly; Fouling is affected the migration of ion, thereby the resistance of assembly is increased, and the voltage of assembly is raise; Secondly, it is not smooth that the fouling meeting causes dense water current in the dense hydroecium 6, can not will in time shift out assembly by the heat that electric current produced, and hot-spot that further can generating assembly finally causes the high temperature of amberplex and other parts to destroy.
In spiral wound EDI design, the assembling process of assembly is fairly simple, and the filling ratio of ion exchange resin is easier to.But existing spiral wound EDI assembly also has many defectives.
The central tube of spiral wound EDI assembly generally is as an electrode (male or female), and another electrode (negative electrode or anode) device is in the shell of assembly.Become radial CURRENT DISTRIBUTION district between two electrode shapes, under this current distributions, electric current distribution from the central area to close shell zone is different, near the current density height of central area, and low near the current density in shell zone.And the height of current density, with the ability that removes foreign ion of decision EDI assembly.Electric current distribution inhomogeneous will be caused the difference of the product water water quality of output from the diverse location freshwater room, and final EDI assembly to produce water be that product water by different quality mixes, mix the total product water water quality in back and be difficult to control.
The dense hydroecium of spiral wound EDI assembly as shown in Figure 3.Central tube 9 and dense hydroecium 10 are divided into up and down two parts, and dense water is that the lower part 11 by central tube enters assembly, enters into dense hydroecium 10 through the opening on the tube wall of lower part.Then, spiral mobile along the concentrated stream road to shell 12 directions.When arriving the dense water of outermost layer coating film 13, the dense water 14 of small part enters into the utmost point hydroecium 15 of shell electrode from this film perforate, and 16 flows out assemblies from utmost point hydroecium top.The dense water of remainder upwards and the dense hydroecium 10 on the top of turning back back, and is and spiral mobile to central tube 9 directions along the concentrated stream road.Opening from central tube 9 tops flow into central tube top at last, and finally flows out assembly from the central tube upper outlet.Among Fig. 3,18 are the fresh water water inlet, and 19 is fresh water water outlet direction.In this design, because dense water current flow in the mode of turning back, at two regional A of dense hydroecium and B, current form flow blind angle easily, thereby cause at this regional mass-and heat-transfer insufficient, influence the performance of assembly, also may cause the hot-spot of assembly, amberplex and resin are caused damage.
In addition, though dense water of spiral wound EDI and fresh flow in the cross-flow mode, promptly two water (flow) directions are 90 ° of angles approximately, but, because dense water current are to flow in the mode of turning back, and remove and enter into the hardness ions of dense hydroecium from fresh, as calcium ion, after entering into the dense hydroecium of assembly lower part, also can turn back again and flow back in the dense hydroecium on assembly top along with dense water current.The luxuriant son of light current, the dense hydroecium on the top that can enter into assembly as bicarbonate radical, carbonate and organosilicon ion etc. and the hydrogen ion that produces by hydrone ionization and hydroxide ion.So, in the dense hydroecium on assembly top, hardness ions will meet with bicarbonate radical, carbonate and hydroxide ion etc., so also can be as plate and frame EDI assembly, owing to fouling causes many influences to assembly.
At last, in this spiral wound EDI assembly, the utmost point hydroecium of central tube electrode does not have and dense hydroecium separates, and makes mixing of utmost point water and dense water and major part circulate in assembly.The oxidizing gas part that is produced by electrode reaction can not be discharged assembly like this, thereby cause the influence to assembly property, or amberplex and resin are damaged.
Summary of the invention
In order to solve existing problem in the above-mentioned two class EDI assemblies, an object of the present invention is to propose a kind of plate and frame continuous electrodeionization device, this device is convenient in the site of deployment filling and is changed resin, can adjust the filling ratio of resin easily, and prevent the sealing problem that causes owing to resin particle.
Another object of the present invention provides a kind of plate and frame continuous electrodeionization device, and this device is convenient in the site of deployment filling and is changed resin, and guarantees that dense water and fresh are to flow in the cross-flow mode, make concentrated stream move distributing equilibrium.
For realizing purpose of the present invention, electric deionizer of the present invention comprises: parallel relative negative electrode and anode; The yin, yang amberplex is arranged alternately between negative electrode and anode; The cathode and anode hydroecium is between negative electrode and anode and respectively in abutting connection with negative electrode, anode; Freshwater room and dense hydroecium, be arranged alternately between the yin, yang amberplex, wherein: the freshwater room opening that a side setting of freshwater room workspace is communicated with it, the dense hydroecium opening that one side setting of dense hydroecium workspace is corresponding with the freshwater room opening, with yin, yang amberplex, freshwater room, dense hydroecium, negative electrode hydroecium, the anode hydroecium is stacked when fitting together, opening constitutes the filler can fill the sub-material of diversion in sub-material of diversion or the replacing freshwater room workspace in the freshwater room workspace, filler by sealing baffle with the removably capping.
In addition, a freshwater room workspace side relative with opening is provided with the fresh water apopore, fresh water flows into the freshwater room workspace by opening and is flowed out by the fresh water apopore, the two opposite sides that are parallel to the extension of fresh direction in dense hydroecium workspace are established dense hydroecium water inlet and dense hydroecium delivery port respectively, and dense hydroecium water inlet extends along the direction parallel with the fresh water flow direction with dense hydroecium delivery port.
Particularly, dense hydroecium water inlet comprises dense water inlet opening and the dense water inlet distribution of the strip hole of being extended by dense water inlet opening; Dense hydroecium delivery port comprises dense water apopore and the dense water water outlet of the strip collection hole that is extended by dense water apopore.
In addition, dense water water inlet water-distributing device is arranged in the dense hydroecium workspace and in abutting connection with dense water water inlet, dense water water outlet captation is provided with in the dense hydroecium workspace and the dense water delivery port of adjacency.Dense hydroecium also can be provided with diversion component in the workspace, this diversion component along with the fresh direction at 45～135 ° angle direction extends, make in the dense hydroecium workspace dense water along with the fresh direction at 45～flow in 135 ° angular direction.
In addition, the position that contacts with sealing baffle of filler is provided with sealing unit.
Particularly, opening is communicated with the freshwater room workspace by fresh water water inlet water-distributing device, and the fresh water apopore is communicated with the freshwater room workspace by fresh water water outlet captation.
In addition, the outside of negative electrode and anode is fixed with first and second end plates respectively, and base plate is placed in the sealing baffle outside, and is fixed on first and second end plates.
Utmost point hydroecium workspace has independently utmost point water water inlet and the utmost point water delivery port that is communicated with it, the utmost point water water inlet water distributing pore that utmost point water water inlet comprises utmost point water inlet opening and utmost point water inlet opening is communicated with utmost point hydroecium workspace; Utmost point water delivery port comprises utmost point water apopore and the utmost point water water outlet collection hole that utmost point water apopore is communicated with utmost point hydroecium workspace.
The present invention has the following advantages:
1, assembly of the present invention is when assembling, do not need in each freshwater room, to add resin respectively in advance as the assembling of conventional panels frame EDI assembly, but after the assembly assembling is finished, dose resin by the resin filler to assembly again, therefore, can load easily as required and change sub-material of diversion such as ion exchange resin in site of deployment, and can regulate the kind of resin filling.Like this, simplify the assembly packaging technology, shortened the assembling cycle of assembly, reduced the operating cost of assembly, prolong the service life of assembly greatly, avoid in addition dropping to the sealing problem that causes on the sealing surface of amberplex and freshwater room and dense hydroecium because of resin particle.
2, in project organization of the present invention, realized that fresh water and dense water flow in complete cross-flow mode, make hardness ions such as calcium ion and the magnesium ion etc. that remove and enter into dense hydroecium from the freshwater room water inlet end, in dense hydroecium along with dense water current flow out dense hydroecium according to the direction perpendicular to fresh, rather than as in traditional plate and frame EDI, dense water current are to flow along fresh is equidirectional.So just avoided hardness ions and bicarbonate radical, carbonate and hydroxyl plasma with the corresponding dense hydroecium in freshwater room water side in meet, therefore avoid taking place in the existing dense hydroecium of plate and frame electric deionizer the possibility of fouling, problem such as avoided the performance of the amberplex that causes because of fouling to reduce, dense water current are smooth, amberplex and other parts hot-spot wreck has also just improved the hardness accommodation of EDI assembly to the fresh water water inlet simultaneously.
3, in project organization of the present invention, dense water enters dense hydroecium by dense water inlet opening and dense water distribution hole, realized the even flow distribution of dense water in dense hydroecium, avoided in the dense hydroecium of spiral wound electric deionizer because the unbalanced and flow blind angle of flow distribution of the dense water that the design of the Zigzag type of dense water causes can not in time shift out the mistake cause thermal damage problem that causes thereby solved the heat that produces because of assembly.
4, project organization of the present invention can holding plate frame EDI assembly in the electric current distribution advantage of uniform, avoid appearing at the uneven shortcoming of CURRENT DISTRIBUTION in the spiral wound EDI assembly, make EDI produce water quality stabilizing.
5, in the project organization of the present invention, the water inlet of two utmost point hydroeciums and water outlet are fully independently, the water inlet of utmost point water flows to the utmost point hydroecium from the inlet opening through the inlet distribution device, flow out from utmost point water apopore through utmost point water effluent collector then, therefore the water inlet and the water outlet of electrode water and dense water are separated fully, have overcome among conventional panels frame EDI and the spiral wound EDI problem that links to each other and occurred because of the water inlet of utmost point water and dense water water inlet: be unfavorable for the control of utmost point water and may cause the gas of electrode reaction generation to enter into dense water system.
Embodiments of the present invention is described in detail below in conjunction with accompanying drawing, the invention is not restricted to the embodiment of following discloses, and any modification, replacement that does not break away from the present invention's spirit and essence all falls in the protection domain of the present invention that is defined by the claims.
Description of drawings
Fig. 1 is the structural representation of prior art continuous electrodeionization device;
Fig. 2 is the schematic diagram that continuous electrodeionization device shown in Figure 1 removes foreign ion;
Fig. 3 is the dense hydroecium and the dense water current schematic diagram of prior art spiral wound electric deionizer;
Fig. 4 is the schematic diagram of the freshwater room matrix of electric deionizer of the present invention;
Fig. 5 is the schematic diagram of the dense hydroecium matrix of electric deionizer of the present invention;
Fig. 6 is the schematic diagram of the utmost point hydroecium matrix of electric deionizer of the present invention;
Fig. 7 is the schematic diagram of fresh water and dense water current in the electric deionizer of the present invention;
Fig. 8 is the matrix assembling schematic diagram of electric deionizer of the present invention;
Fig. 9 is the part decomposing schematic representation of the resin filler of electric deionizer of the present invention;
Figure 10 is the profile stereogram of electric deionizer of the present invention.
Description of reference numerals: 1 anode; 2 negative electrodes; 3 anion exchange resin; 4 cationic ion-exchange resins; 5 freshwater rooms; 6 dense hydroeciums; 7a anode hydroecium; 7b negative electrode hydroecium; 8 ion exchange resin; 9 spiral wound EDI central tubes; The dense hydroecium of 10 spiral wound EDI; 11 spiral wound EDI central tube lower parts; 12 spiral wound EDI shells; The dense water coating film of 13 spiral wound EDI; The dense water current of 14 spiral wound EDI; 15 spiral wound EDI utmost point hydroeciums; The 16 spiral wound EDI utmost point mouths of a river; 17 spiral wound EDI central tube upper outlets; The dense water water inlet of 18 spiral wound EDI; The dense water water outlet of 19 spiral wound EDI; 21 freshwater room openings; 22 fresh water apopores; 23 fresh water water inlet water-distributing device; 25 dense water inlet openings; 26 dense water delivery ports; 27 freshwater room workspaces; 28,28 ', 28 " installing hole; 31 dense hydroecium openings; 33 water-guiding elements; 34 plastic grids; 35 dense water water inlets; 36 dense water delivery ports; 37 dense water water inlet water-distributing devices; 38 dense water water outlet captations; 39 dense hydroecium workspaces; 40 utmost point water water inlets; 41 utmost point water delivery ports; 43 utmost point water water inlet water-distributing device; 44 utmost point water water outlet captations; 47 utmost point hydroecium workspaces; 50 assemblies; 51 fillers; 53 sealing units; 54 sealing baffles; 55 base plates; 56 first end plates; 57 second end plates; 61 fresh water water inlet pipes; 62 fresh water outlet pipes; 65 dense water water inlet pipes; 66 dense water outlet pipes; 67 utmost point water water inlet pipes; 68 utmost point water outlet pipes
Describe the embodiment of EDI construction package of the present invention with reference to the accompanying drawings in detail.
The specific embodiment
At first the filling structure that the present invention realizes loading and changing freshwater room intermediate ion exchanger resin is described with reference to Fig. 4,5 and 9.
As shown in Figure 4, the freshwater room of EDI assembly of the present invention is made of the general rectangular plate and frame matrix with workspace or middle cavity 27, can load sub-material of diversion such as ion exchange resin (not shown) in the workspace 27.Freshwater room is provided with opening 21 along the upstream side of water (flow) direction, can be used as the filler of resin and the water inlet of fresh water; Freshwater room and opening 21 relative downstreams are provided with fresh water apopore 22.Fresh water water inlet water-distributing device 23 is arranged between opening 22 and the middle cavity 27 and it is communicated with, and fresh water water outlet water collecting part device 24 is arranged between fresh water apopore 22 and the middle cavity 27 and it is communicated with.The two opposite sides that the fresh direction extends of being parallel at freshwater room middle cavity 27 are respectively equipped with dense water water inlet 35 and corresponding dense water water inlet 25 and the dense water delivery port 26 of dense water delivery port 36 (see figure 5)s with dense hydroecium.The periphery of freshwater room matrix is established installing hole 28, is used to insert the bolt of fastening EDI assembly.
After the pre-assembling of assembly is finished, can pass through the ion exchange resin of opening 21 and freshwater room water inlet water-distributing device 23 filler particles shape in freshwater room middle cavity 27, or change ion exchange resin wherein.Ion exchange resin can be selected one or more in negative and positive hybrid resin, negative and positive layering resin, equal grain distribution resin and the non-equal grain distribution resin.
Wherein, cationic ion-exchange resin can be strong-acid type and weak-type gel type resin, perhaps can be strong-acid type and weak-type porous type resin; Anion exchange resin can be I type and II type gel type resin, perhaps can be I type and II type porous type resin.
As shown in Figure 5, the dense hydroecium of EDI assembly of the present invention is made of the general rectangular plate and frame matrix with workspace or middle cavity 39, and the one side also has the opening 21 corresponding openings 31 with the freshwater room side, and opening 31 is not communicated with dense hydroecium middle cavity 39.Dosed sub-material of diversion or inert material 34 in the middle cavity 39 of dense hydroecium, the sub-material of diversion can be an ion exchange resin, and inert material can be plastic grid material or nonwoven.
As shown in Figure 9, freshwater room 5, dense hydroecium 6 are stacked in an alternating manner, and separate freshwater room 5 and dense hydroecium 6 in an alternating manner with yin, yang amberplex 3,4, by at installing hole 28,28 ' and 28 " in inserting bolt and fastening being fixed be in the same place, promptly constituted plate and frame EDI assembly 50 of the present invention in this way.Side corresponding to freshwater room opening 21 and dense hydroecium opening 31, one end of assembly 50 has formed a rectangle filler 51, as shown in Figure 9, ion exchange resin can be loaded in the freshwater room of assembly 50 by this filler 51, also can change by 51 pairs of resins that loaded of this filler.The perimeter mounted of resin filler 51 has sealing frame and sealing O-type circle 53.After the resin filling is finished, seal with sealing baffle 54 cappings, is fixed by two end plate first end plates 56 and second end plate 57 with assembly base plate 55 then.Change the resin in the assembly 50 if desired, the assembly base plate 55 that at first will be fixed on two end plates 56 of assembly and 57 disassembles, and then sealing baffle 54 is taken off, and draws off the resin in the assembly.After loading new resin, resin filler 51 is sealed according to preceding method.
In the EDI assembly of the present invention, the amberplex between freshwater room and the dense hydroecium can be a homogeneous ion-exchange membrane, also can be the heterogeneous ion exchange membrane.Form sealing between amberplex and freshwater room and dense hydroecium, can adopt the sealing of sealing ring mode, also can adopt the sealing of fluid sealant mode, or the sealing of sealing ring and fluid sealant compound mode.
Then, referring again to Fig. 4,5 and 7 describes the present invention and realizes that fresh and dense water current are the structure of cross-flow passes.
As shown in Figure 4, along upstream side, the downstream of fresh direction freshwater room opening 21 and the fresh water apopore 22 that is communicated with the workspace of freshwater room is set respectively at freshwater room, make when fresh water is flowed into by freshwater room opening 21, can flow through the workspace 27 of freshwater room 5, and flow out by fresh water apopore 22.
The two opposite sides that the fresh direction is extended that are parallel in the freshwater room workspace, dense water water inlet 25 and the dense water delivery port 26 that is not communicated with the workspace 27 of freshwater room is set respectively, make when dense water is flowed into by dense water water inlet 25, can not flow into the workspace 27 of freshwater room 5.This dense water water inlet 25 and dense water delivery port 26 are corresponding to dense water water inlet 35 on the dense hydroecium and dense water delivery port 36 (see figure 5)s.
As shown in Figure 5, the two opposite sides that the fresh direction is extended that are parallel in dense hydroecium workspace, be respectively equipped with and be roughly parallel to dense water water inlet 35 and the dense water delivery port 36 that the fresh direction is extended, make when dense water is flowed into by dense water water inlet 35, flow through dense hydroecium workspace 39 along direction, then by dense water delivery port 36 perpendicular to fresh.At dense hydroecium fresh water water inlet openings 31 and fresh water apopore 32 are set, freshwater room opening 21 and the fresh water apopore 22 with freshwater room is corresponding respectively for they, and is not communicated with dense hydroecium workspace 39.
Wherein, dense water water inlet 35 comprises dense water water inlet circular hole and is the dense water inlet distribution hole of strip, and the distribution hole is parallel to the whole work head of district that dense hydroecium workspace extends to dense hydroecium; Dense hydroecium delivery port 36 comprises dense water water outlet circular hole and is the dense water water outlet collection hole of strip, and collection hole is parallel to the whole work head of district that dense hydroecium workspace extends to dense hydroecium.Therefore, roughly extend along the direction parallel with the fresh direction with dense water water outlet collection hole in dense water inlet distribution hole.Between dense hydroecium workspace 39 and dense water inlet distribution hole, be provided with dense water water inlet water-distributing device 37 along dense water inlet distribution hole.Similarly, go out between the water distribution hole, be provided with dense water water outlet captation 38 in dense hydroecium workspace 39 and dense water.In dense hydroecium workspace 39, can dose inertia backing material such as plastic grid 34, but or sub-material of interpolation diversion such as ion exchange resin.
EDI device of the present invention makes dense water and fresh water flow in cross-flow mode shown in Figure 7 owing to have the said structure design: fresh water is from opening 21 1 side inflow freshwater room workspaces 27, and the apopore 22 through freshwater room workspace opposite side flows out then; Dense water flows into from dense hydroecium inlet opening, and enter in the dense hydroecium workspace 39 by the dense water inlet distribution hole that communicates with it, dense water water outlet gully-hole and dense water apopore through overrich hydroecium opposite side flows out then, because extend along the direction parallel with the fresh direction with dense water water outlet collection hole in dense water inlet distribution hole, make and intersect at an angle of 90 with dense water water (flow) direction with the fresh direction, be that fresh and dense water current are cross-flow passes, make hardness ions such as calcium ion and the magnesium ion etc. that remove and enter into dense hydroecium from the freshwater room water inlet end, in dense hydroecium position corresponding to the freshwater room water inlet end, according to perpendicular to the direction of fresh along with concentrated stream goes out assembly, and avoided at dense hydroecium position hardness ions and bicarbonate radical corresponding to the freshwater room water side, carbonate and hydroxide ion etc. meet, and have therefore just prevented from dense hydroecium fouling to take place.
In addition, also can assemble some dense water diversion components 33 in the workspace of dense hydroecium, these diversion components can become different angles with the fresh direction, and this angular range can be preferred 45 °～135 °, such as when this angle is 60 °, fresh direction and dense water water (flow) direction are crossed as 60 °; When this angle was 90 °, the fresh direction was intersected at an angle of 90 with dense water water (flow) direction, and promptly fresh and dense water current are cross-flow passes completely.
Except that replacing stacked freshwater room and dense hydroecium, also comprise two utmost point hydroeciums in the EDI assembly of the present invention, i.e. cathode chamber and anode chamber are respectively in abutting connection with negative electrode and anode.As shown in Figure 6, the utmost point hydroecium of EDI assembly of the present invention has workspace or middle cavity 47, wherein can dose sub-material of diversion or inert material, and the sub-material of diversion can be an ion exchange resin, and inert material can be plastic grid material or nonwoven.In utmost point hydroecium and the survey of freshwater room fresh direction upstream, corresponding two opposite sides, downstream, establish utmost point water inlet opening 40 and utmost point water apopore 41 respectively, utmost point water inlet opening 40 communicates with utmost point hydroecium workspace 47 by water inlet water-distributing device 43, and utmost point water apopore 41 communicates with utmost point hydroecium middle cavity 47 by utmost point water effluent collection device 44.The installing hole 28 that the periphery setting of dense hydroecium matrix and freshwater room periphery installing hole 28 is corresponding ".
The anion and cation exchange membrane that is used to separate freshwater room and dense hydroecium or freshwater room and utmost point hydroecium can be homogeneous ion-exchange membrane or heterogeneous ion-exchange membrane.
The installation process of EDI assembly of the present invention is described below.
As shown in Figure 9, do not have the end plate 56 of water inlet and water outlet interface to be put on the assembly assembly or fitting table one of EDI assembly, then a utmost point hydroecium (not water inlet and water outlet adapter) is overlayed on the end plate 56; Next dense hydroecium, amberplex and freshwater room are stacked alternately and form mould heap together, can between amberplex and freshwater room and dense hydroecium, be coated with if desired and add adhesive; Then, another utmost point hydroecium (into water and water outlet adapter are arranged) and another end plate 57 (into water and water outlet interface are arranged) are stacked on the above-mentioned mould heap, this mould heap is fastening by the bolt special that passes dense hydroecium, amberplex, freshwater room, utmost point hydroecium periphery installing hole; At last, use adhesive will seal the edge that frame is fixed on resin filler 51, obtain assembly 50 as shown in Figure 9; Said modules 50 is put on the shaking platform, opens vibration, resin is added assembly from resin filler 51; After the resin filling is finished, the inlet distribution grid is fixed on resin filler 51 bottoms with the grid fixed strip.Then, will seal O-type circle 53 is loaded on the sealing frame; Filler baffle plate 54 is covered on the filler 51, and assembly base plate 55 is assemblied on the baffle plate 54, with screw special it is fastened on two end plates 56,57 of assembly 50, has just obtained EDI assembly as shown in figure 10.
Refer again to shown in Figure 9ly, fresh water water inlet pipe 61, fresh water outlet pipe 62 on EDI assembly second end plate 57 link to each other with freshwater room opening 21, fresh water apopore 22 respectively; Dense water water inlet pipe 65, dense water outlet pipe 66 link to each other with dense water water inlet 35, dense water delivery port 36 respectively; Utmost point water water inlet pipe 67, utmost point water outlet pipe 68 link to each other with utmost point water inlet opening 40, utmost point water apopore 41 respectively.
Claims (10)
1. electric deionizer comprises:
Parallel relative negative electrode and anode;
The yin, yang amberplex is arranged alternately between negative electrode and anode;
The cathode and anode hydroecium is between negative electrode and anode and respectively in abutting connection with negative electrode, anode;
Freshwater room and dense hydroecium are arranged alternately between the yin, yang amberplex,
Wherein, the freshwater room opening (21) that one side setting of freshwater room workspace (27) is communicated with it, the dense hydroecium opening (31) that (39) the one side settings of dense hydroecium workspace are corresponding with freshwater room opening (21), dense hydroecium opening (31) is not communicated with dense hydroecium workspace, at Jiang Yin, cation-exchange membrane, freshwater room, dense hydroecium, the negative electrode hydroecium, the anode hydroecium is stacked when fitting together, opening (21,31) constitute the filler (51) can to freshwater room workspace (27) in, fill the sub-material of diversion in sub-material of diversion or the replacing freshwater room workspace (27), filler (51) by sealing baffle (54) with the removably capping.
2. electric deionizer as claimed in claim 1 is characterized in that:
Described freshwater room workspace (a 27) side relative with described freshwater room opening (21) is provided with fresh water apopore (22), and fresh water flows into described freshwater room workspace (27) by described freshwater room opening (21) and flowed out by fresh water apopore (22); The two opposite sides that the fresh direction is extended that are parallel in described dense hydroecium workspace (37), establish dense hydroecium water inlet (35) and dense hydroecium delivery port (36) respectively, dense hydroecium water inlet (35) is extended along the direction parallel with described fresh water flow direction with dense hydroecium delivery port (36).
3. electric deionizer as claimed in claim 2 is characterized in that: described dense hydroecium water inlet (35) comprises dense water inlet opening and the dense water inlet distribution of the strip hole of being extended by dense water inlet opening; Described dense hydroecium delivery port (36) comprises dense water apopore and the dense water water outlet of the strip collection hole that is extended by dense water apopore.
4. electric deionizer as claimed in claim 2, it is characterized in that: dense water water inlet water-distributing device (37) is arranged on the interior and adjacency described dense water water inlet (35) in described dense hydroecium workspace (39), and dense water water outlet captation (38) is arranged in the described dense hydroecium workspace (39) and adjacency described dense water delivery port (36).
5. as the arbitrary described electric deionizer of claim 1 to 4, it is characterized in that: diversion component (33) is set in the described dense hydroecium workspace (39).
6. electric deionizer as claimed in claim 5, it is characterized in that: described diversion component (33) along with the fresh direction at 45～135 ° angle direction extends, make in the dense hydroecium workspace (39) dense water along with the fresh direction at 45～flow in 135 ° angular direction.
7. as the arbitrary described electric deionizer of claim 1 to 4, it is characterized in that: the position that described filler (51) contacts with sealing baffle (54) is provided with sealing unit (53).
8. as the arbitrary described electric deionizer of claim 1 to 4, it is characterized in that: described freshwater room opening (21) is communicated with described freshwater room workspace (27) by fresh water water inlet water-distributing device (23), and described fresh water apopore (22) is communicated with freshwater room workspace (27) by fresh water water outlet captation (24).
9. as the arbitrary described electric deionizer of claim 1 to 4, it is characterized in that: the outside of described negative electrode and anode is fixed with first and second end plates (56,57) respectively, base plate (55) is placed in described sealing baffle (54) outside, and is fixed on described first and second end plates (56,57).
10. as the arbitrary described electric deionizer of claim 1 to 4, it is characterized in that: described utmost point hydroecium has independently utmost point water water inlet (40) and the utmost point water delivery port (41) that is communicated with it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100762621A CN100372598C (en) | 2006-04-21 | 2006-04-21 | Continuous electrodeionization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100762621A CN100372598C (en) | 2006-04-21 | 2006-04-21 | Continuous electrodeionization device |
Publications (2)
| Publication Number | Publication Date |
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| CN1864823A CN1864823A (en) | 2006-11-22 |
| CN100372598C true CN100372598C (en) | 2008-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100762621A Expired - Fee Related CN100372598C (en) | 2006-04-21 | 2006-04-21 | Continuous electrodeionization device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3503994B1 (en) * | 2016-08-23 | 2024-03-06 | Swan Analytische Instrumente AG | Device and method for the electrodeionization of a liquid |
| CN111003764A (en) * | 2019-12-31 | 2020-04-14 | 浙江中凯瑞普环境工程股份有限公司 | Electric desalting system for reclaimed water and application thereof |
| CN111675290B (en) * | 2020-06-17 | 2022-04-26 | 江苏科技大学 | Sustainable capacitive deionization seawater desalination system |
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| US5308466A (en) * | 1990-12-17 | 1994-05-03 | Ip Holding Company | Electrodeionization apparatus |
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| US6344122B1 (en) * | 1999-07-13 | 2002-02-05 | Kurita Water Industries Ltd. | Electrodeionization apparatus |
| CN2561500Y (en) * | 2002-08-07 | 2003-07-23 | 浙江欧美环境工程有限公司 | Concavo-convex plate-frame ion exchnage film bags |
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| CN2761599Y (en) * | 2005-01-12 | 2006-03-01 | 中国人民解放军军事医学科学院卫生装备研究所 | Stage filling type electric deionization device |
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Patent Citations (6)
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|---|---|---|---|---|
| US5308466A (en) * | 1990-12-17 | 1994-05-03 | Ip Holding Company | Electrodeionization apparatus |
| CN1210476A (en) * | 1996-02-09 | 1999-03-10 | 格莱格水处理公司 | Modular apparatus for demineralization of liquids |
| US6344122B1 (en) * | 1999-07-13 | 2002-02-05 | Kurita Water Industries Ltd. | Electrodeionization apparatus |
| CN2561500Y (en) * | 2002-08-07 | 2003-07-23 | 浙江欧美环境工程有限公司 | Concavo-convex plate-frame ion exchnage film bags |
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| CN1864823A (en) | 2006-11-22 |
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