CN104512947A - Rolling type continuous electrodeionization device - Google Patents
Rolling type continuous electrodeionization device Download PDFInfo
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- CN104512947A CN104512947A CN201410779955.1A CN201410779955A CN104512947A CN 104512947 A CN104512947 A CN 104512947A CN 201410779955 A CN201410779955 A CN 201410779955A CN 104512947 A CN104512947 A CN 104512947A
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- electrodeionization device
- continuous electrodeionization
- rolling continuous
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
- C02F1/4695—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis electrodeionisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
- B01D61/44—Ion-selective electrodialysis
- B01D61/46—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
- B01D61/44—Ion-selective electrodialysis
- B01D61/52—Accessories; Auxiliary operation
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- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Urology & Nephrology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a rolling type continuous electrodeionization device. A cylindrical shell is included; end covers are arranged on the upper end and lower end of the shell; a center tube is coaxially arranged within the center of the shell; the upper and lower end covers sheath on the top and bottom of the center tube; membrane cores comprising of a plurality of anion and cation exchange membrane layers in alternating arrangement and corresponding supporting materials is arranged between the center tube and the shell; the anion and cation exchange membranes separate concentrated waters chamber and freshwater chambers; the freshwater chamber is filled with ion exchange resin; and an electrode plate is disposed between the shell and the outermost membrane core; the center tube is set as on pole of the electrode, and the electrode plate is set as a corresponding other pole; the end cover includes inner covers and outer covers, the inner covers are on the inner sides of the outer covers, and the outer covers are positioned in the end of the shell; the end inner wall of the shell is provided with a loop of spacing grooves, and stoppers are arranged in the spacing grooves. The retainer ring stoppers arranged in the shell can prevent axial displacement of the end covers, and avoid the leakage of components.
Description
Technical field
The present invention relates to electrodeionization technical field, disclose a kind of rolling continuous electrodeionization device especially.
Background technology
Electrodeionization (Electrodeionization) is called for short EDI, is a kind of pure water manufacturing technology ion exchange technique and electrodialytic technique combined.Electrodeionization (EDI) system, mainly under the effect of DC electric field, by dielectric medium ion generation displacement in the water of dividing plate, utilizes exchange membrane to the selection of ion through the water technology be used for a kind of science that water quality is purified.Between the pair of electrodes of electric deionizer, usually by cavity block, anode membrane and many groups, dividing plate (first, second) are alternately arranged, and form dense room and light room (i.e. cation permeable anode membrane, negatively charged ion can pass through cavity block), in freshwater room, be also filled with mixture iron exchange resin.Zwitterion in mixed ion exchange resin absorption feedwater, simultaneously these by the ion that adsorbs again under the effect of volts DS, the process be removed through anion and cation exchange membrane respectively, namely light room water cationic migrates through anode membrane to negative pole, is retained by the cavity block in dense room; In water, negatively charged ion is to positive extreme direction migration cavity block, retained by the anode membrane in dense room, reduced gradually by the water intermediate ion number of light room like this, become fresh water, and in the water of dense room, because the zwitterion of dense room is constantly poured into, dielectric medium ionic concn constantly raises, and becomes dense water, thus reach desalination, purify, concentrated or refining object, and the hydrogen ion produced by water electrolysis and hydroxide ion carry out cyclic regeneration to loaded resin.
Therefore EDI water process do not need acid, alkali pharmaceutical chemicals regeneration can produce high-quality ultrapure water continuously, it possesses skills advanced person, compact construction, advantage easy and simple to handle, can be widely used in electric power, electronics, medicine, chemical industry, food and field, laboratory, be the Green Revolution of water technology.Simultaneously, EDI technology is developed fast, such as patent CN101541686A discloses a kind of electric deionizer, be alternately arranged multiple anion-exchange membrane and cationic exchange membrane and alternately form concentration compartments and desalting chamber between a cathode and an anode, bipolar membrane is set in this concentration compartments and is partitioned into cathode side and anode side by this concentration compartments, above-mentioned desalting chamber is divided at least two layers of the first layer and the second layer from the upstream side of the flow direction of processed water, fill the ion exchanger be made up of anion ion exchange body and cation exchange column, the ion exchanger being filled in above-mentioned the first layer contains 50%(volume) more than above-mentioned cation exchange column, the ion exchanger being filled in the above-mentioned second layer contains more than 50%-80%(volume) above-mentioned anion ion exchange body.Patent CN101037242A discloses disk type electrical ion-removing water softening apparatus, cylindrical, it comprises disc membrane stack, disc-shaped electrode device and these three major portions of disc-shaped end gripping unit, also comprise cylindrical sleeve and these two accessory constituents of equilateral triangle support, disc membrane stack is divided into some groups of films pair, often organize film to being by anion-exchange membrane, water softening room hollow shelf, cationic exchange membrane and each composition of hard water room hollow shelf, with the arrangement of fixing sequence alternate, film is electrode device to two ends, with end gripping unit, these assemblies are compressed, membrane stack, electrode device and end gripping unit are all contained in described cylindrical sleeve, described equilateral triangle support is equipped with at described cylindrical sleeve two ends.Patent CN1864823A discloses a kind of electric deionizer, comprising: parallel relative negative electrode and anode, anions and canons exchange membrane, is arranged alternately between a cathode and an anode, cathode and anode hydroecium, also adjoins negative electrode, anode respectively between negative electrode and anode, freshwater room and dense hydroecium, be disposed alternately at the moon, between cationic exchange membrane, wherein, the side of freshwater room workspace arranges the freshwater room opening be communicated with it, dense hydroecium workspace side arranges the dense hydroecium opening corresponding with freshwater room opening, dense hydroecium opening is not communicated with dense hydroecium workspace, at Jiang Yin, cationic exchange membrane, freshwater room, dense hydroecium, negative electrode hydroecium, anode hydroecium is stacked when fitting together, opening forms the filler of leading ionic material can filled in freshwater room workspace and lead ionic material or change in freshwater room workspace, filler is by sealing baffle removably capping.
But the research in electric deionizer antiseep is relatively less, particularly for the improvement opportunity of the antiseep aspect of the continuous electrodeionization device of circle.In the installation process of assembly, when end cap being pressed into shell, there is the phenomenon of end cap peripheral flanging due to center and periphery unbalance stress in existing large-scale EDI device, thus generating assembly seepage; There is research staff that several dogs are set in the surrounding of end cap, several locating grooves are set inside the shell of correspondence, during installation, end cap inserts after in shell, rotation makes dog be fixed in locating groove, thus avoids the phenomenon of end cap peripheral flanging, but easily makes sealing-ring crimp even break generation drainage when this kind of structure rotates, and by large-scale extracting tool and device, need take time and effort during dismounting.
In addition, an electrode structure mainly monoblock battery lead plate of existing electric salt eliminator component element, cost is larger, and exist when rolling into columnar structured not flexible, affect the uniformity coefficient of electric field distribution, and need by plastic grid when fitting with shell, in assembly During Process of Long-term Operation, the easy crimp of plastic grid, affects the working efficiency of assembly.
Summary of the invention
The object of the present invention is to provide a kind of rolling continuous electrodeionization device, it adopts and arranges spring collar limited block in the enclosure, can stop end cap generation axial displacement, avoid assembly and leak.
The invention provides a kind of rolling continuous electrodeionization device, comprising:
Columnar shell,
End cap, is arranged at the top and bottom of shell respectively;
Pipe core, is located at the center of enclosure, and arranges with shell concentric, and upper and lower end cap is socketed on top and the bottom of pipe core respectively;
The film core that the anions and canons exchange membrane alternately arranged by some layers and corresponding propping material are formed, is located between pipe core and shell, is separated out dense hydroecium and freshwater room, is filled with ion exchange resin in freshwater room by anion and cation exchange membrane; With
Battery lead plate, is arranged between shell and outermost film core;
Wherein, pipe core is set to a pole of electrode, battery lead plate is set to another corresponding pole;
End cap comprises inner cap and enclosing cover, and inner cap is positioned at the inner side of shell, and enclosing cover is positioned at the end of shell, and the inner wall of end of shell is provided with a circle stopper slot, is provided with limited block in stopper slot.
Preferably, described limited block is spring collar.
Preferably, described spring collar is the spirochete that whole piece circlip bends to some circle superpositions.
By arranging spring collar limited block in the enclosure, inner cap generation axial displacement can be stoped, avoid assembly to leak, in addition, spring collar does not need just can fill easily by instrument to get completely, make easy installation and removal, time saving and energy saving, effectively can prevent sealing-ring from overturning in installing/dismounting process and produce distortion dislocation and occur drainage.
Preferably, the circlip face of described spring collar is oblate shape, and one end is provided with the elbow vertical with circlip face.
Preferably, the circlip face width degree of described spring collar is greater than the width of stopper slot.
The end of spring collar one end is provided with the elbow vertical with circlip face, when taking out spring collar, catches on elbow and pull with finger, the internal diameter of spring collar is diminished, and pull-out easily makes it depart from stopper slot, and after letting go, automatically restore to nature diameter, make just in time to be stuck in stopper slot.
Preferably, meshed web plate evenly offered by described battery lead plate, and is evenly provided with the stiffening web of some genesis analysis.
Preferably, the mesh aperture of described battery lead plate is less than 3mm, and the width range of described stiffening web is 3-8mm.
Preferably, described battery lead plate is titanium mesh, titanium plating ruthenium plate or titanium platinum plating plate.
Battery lead plate adopts establishes the web plate of stiffening web, is convenient to bending and fixing, can better outside laminating film core, and make electric field distribution more even, ion migration is more smooth and easy, improves ratio of desalinization, improves the working efficiency of assembly, reduces cost simultaneously.
Preferably, described rolling continuous electrodeionization device also comprises the base for fixed housing, and described base comprises base shell and base ring,
Be provided with a circle support bearing inside described base shell, for the shell of support rolling continuous electrodeionization device, the bottom of described base shell be provided with several L-type draw-in grooves,
Base is located in base shell, and the outer wall of base ring is provided with several protruding pins corresponding with L-type draw-in groove.
Preferably, each protruding pin can slide along L-type draw-in groove.
Rolling continuous electrodeionization device bulk solid is on base assembly, and base ring is fixed on the support of large-scale plant system, make easy for installation, location is simple, and this large-scale plant system can place multiple rolling continuous electrodeionization device.
Beneficial effect of the present invention has:
1, by arranging spring collar limited block in the enclosure, inner cap generation axial displacement can be stoped, avoid assembly to leak, in addition, spring collar does not need just can fill easily by instrument to get completely, make easy installation and removal, time saving and energy saving, effectively can prevent sealing-ring from overturning in installing/dismounting process and produce distortion dislocation and occur drainage.
2, battery lead plate adopts and establishes the web plate of stiffening web, is convenient to bending and fixing, can better outside laminating film core, and make electric field distribution more even, ion migration is more smooth and easy, improves ratio of desalinization, improves the working efficiency of assembly, reduces cost simultaneously.
3, rolling continuous electrodeionization device bulk solid is on base assembly, and base ring is fixed on the support of large-scale plant system, make easy for installation, location is simple.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Accompanying drawing explanation
Accompanying drawing 1 is the one-piece construction figure of rolling continuous electrodeionization device of the present invention.
Accompanying drawing 2 is structural representations of spring collar in rolling continuous electrodeionization device of the present invention.
Accompanying drawing 3 is structural representations of battery lead plate in rolling continuous electrodeionization device of the present invention.
Accompanying drawing 4 is plan structure schematic diagram of base assembly in rolling continuous electrodeionization device of the present invention.
Accompanying drawing 5 is structural representations of base shell in rolling continuous electrodeionization device of the present invention.
Accompanying drawing 6 is structural representations of base ring in rolling continuous electrodeionization device of the present invention.
In figure, 1-device body, 2-upper end cover, 3-lower end cover, 4-base, the dense water water outlet of 5-, the dense water water-in of 6-, 7-fresh water water-in, 8-produces the mouth of a river, 9-pole water water outlet; 11-pipe core, 12-shell, 13-film core, 15-battery lead plate, 21-upper end cover inner cap, 22-upper end cover enclosing cover, 31-lower end cover inner cap, 32-lower end cover enclosing cover, 41-base shell, 42-base ring; 121-stopper slot, 122-limited block, 123-elbow, 151-stiffening web, 411-support bearing, 412-L-type draw-in groove, 422-protruding pin.
Embodiment
Can be well understood to the present invention further by specific embodiments of the invention given below, but they not limitation of the invention.The part do not described in detail in specific embodiment adopts prior art, known technology means and industry standard to obtain.
As depicted in figs. 1 and 2, rolling continuous electrodeionization device of the present invention, comprises device body 1, is located at upper end cover 2 and the lower end cover 3 of the top and bottom of device body respectively, is socketed on the base 4 of the below of device body 1.Device body 1 is cylindrical structure, which is provided with water water outlet 9(pole, pole water is technical term in EDI device, refer to the water in passage between electrode and adjacent ion-exchange membrane), upper end cover 2 is provided with and produces the mouth of a river 8 and dense water water outlet 5, and lower end cover 3 is provided with dense water water-in 6 and fresh water water-in 7.
Be provided with pipe core 11 in device body 1, the shell 12 arranged with pipe core 11 concentric, upper end cover 2 and lower end cover 3 are all socketed on pipe core 11; The film core 13 be made up of the anion and cation exchange membrane alternately arranged and corresponding propping material is set between pipe core 11 and shell 12, a battery lead plate 15 is provided with between outermost tunic core and shell 12, dense hydroecium and freshwater room is separated out by film core 13, be filled with ion exchange resin in freshwater room, dense hydroecium and freshwater room can also be respectively arranged with dense network of rivers lattice and fresh water grid.In the present embodiment, pipe core 11 is as the negative electrode of electrode, and battery lead plate 15 is as the anode of electrode.Upper and lower end cap (2,3) includes inner cap (21,31) and enclosing cover (22,32), and inner cap (21,31) is positioned at the inner side of shell 12, and enclosing cover (21,31) is positioned at the end of shell 12.
The inwall of shell 12 end is equipped with a circle stopper slot 121, inner face and the inner cap 21(31 of stopper slot 121) outer face flush, be provided with limited block 122 in stopper slot 121.Limited block 122 is a steel spring collar, and spring collar is the spirochete that whole piece circlip bends to some circle superpositions, and circlip face is oblate shape, and circlip face width degree is greater than the width of stopper slot 121.The end of spring collar one end is provided with the elbow 123 vertical with circlip face, when taking out spring collar, catch on elbow 123 with finger and pull, the internal diameter of spring collar is diminished, pull-out easily makes it depart from stopper slot 121, and after letting go, automatically restore to nature diameter, make just in time to be stuck in stopper slot 121.Arranging of spring collar limited block 122 can stop inner cap generation axial displacement, avoids assembly and leaks.
Wherein, as shown in Figure 3, battery lead plate 15 is for being provided with the web plate of some stiffening webs 151, and stiffening web 151 is longitudinally uniformly distributed on battery lead plate 15 for the structure of battery lead plate 15, the width range of stiffening web 151 is 3-8mm, the mesh aperture < 3mm of battery lead plate.Battery lead plate 15 material can adopt titanium mesh, titanium to plate ruthenium plate or titanium platinum plating plate etc.
Wherein, the structure of base 4 is as shown in accompanying drawing 4, Fig. 5 and Fig. 6, and base 4 comprises base shell 41 and base ring 42, is provided with a circle support bearing 411 inside base shell 41, and during installation, shell 12 and lower end cover 3 frame are on support bearing 411.The bottom of base shell 41 is evenly provided with four inverted L shape draw-in grooves 412, the external diameter of base ring 42 is slightly less than the internal diameter of base shell 41, the anchor ring of base ring 42 is evenly provided with four screw holes 421, the outer wall of base ring 42 is provided with four protruding pins 422 corresponding with inverted L shape draw-in groove 412; Each protruding pin 422 can slide along inverted L shape draw-in groove 412 and rotate and fix base ring 42 and base shell 41 to bottom.
When multiple assemblies of electric deionizer (EDI) are installed, base ring 42 is screwed on the support crosspiece of whole apparatus system, EDI device body 1 blocks and is fixed on base shell 41, slide after L-type draw-in groove on base shell 41 being aimed at the protruding pin on base ring 42 and rotate to bottom, during installation, correspondence on each EDI assembly each dense, the water-in of fresh water, water outlet (5 and 6,7 and 8) are all located along the same line, and are positioned at corresponding pipeline side.Therefore this device has reasonable in design, installs the advantages such as location is simple, convenient disassembly, not easily generation leakage.
Above disclosedly be only the preferred embodiments of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the present patent application the scope of the claims is done, still belong to the scope that the present invention is contained.
Claims (10)
1. a rolling continuous electrodeionization device, comprising: columnar shell, and end cap is arranged at the top and bottom of shell respectively; Pipe core, is located at the center of enclosure, and arranges with shell concentric, and upper and lower end cap is socketed on top and the bottom of pipe core respectively; The film core that the anion and cation exchange membrane alternately arranged by some layers and corresponding propping material are formed, is located between pipe core and shell, is separated out dense hydroecium and freshwater room, is filled with ion exchange resin in freshwater room by anion and cation exchange membrane; And battery lead plate, be arranged between shell and outermost film core; Wherein, pipe core is set to a pole of electrode, battery lead plate is set to another corresponding pole; It is characterized in that: end cap comprises inner cap and enclosing cover, inner cap is positioned at the inner side of shell, and enclosing cover is positioned at the end of shell, and the inner wall of end of shell is provided with a circle stopper slot, is provided with limited block in stopper slot.
2. rolling continuous electrodeionization device according to claim 1, is characterized in that: described limited block is spring collar.
3. rolling continuous electrodeionization device according to claim 2, is characterized in that: described spring collar is the spirochete that whole piece circlip bends to some circle superpositions.
4. rolling continuous electrodeionization device according to claim 3, is characterized in that: the circlip face of described spring collar is oblate shape, and one end is provided with the elbow vertical with circlip face.
5. the rolling continuous electrodeionization device according to any one of claim 2 to 4, is characterized in that: the circlip face width degree of described spring collar is greater than the width of stopper slot.
6. rolling continuous electrodeionization device according to any one of claim 1 to 4, is characterized in that: meshed web plate evenly offered by described battery lead plate, and is evenly provided with the stiffening web of some genesis analysis.
7. rolling continuous electrodeionization device according to claim 6, is characterized in that: the mesh aperture of described battery lead plate is less than 3mm, and the width range of described stiffening web is 3-8mm.
8. rolling continuous electrodeionization device according to claim 6, is characterized in that: described battery lead plate is titanium mesh, titanium plating ruthenium plate or titanium platinum plating plate.
9. rolling continuous electrodeionization device according to any one of claim 1 to 4, it is characterized in that: also comprise the base for fixed housing, described base comprises base shell and base ring, a circle support bearing is provided with inside described base shell, for the shell of support rolling continuous electrodeionization device, the bottom of described base shell is provided with several L-type draw-in grooves, base is located in base shell, and the outer wall of base ring is provided with several protruding pins corresponding with L-type draw-in groove.
10. rolling continuous electrodeionization device according to claim 9, is characterized in that: each protruding pin can slide along L-type draw-in groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410779955.1A CN104512947A (en) | 2014-12-17 | 2014-12-17 | Rolling type continuous electrodeionization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410779955.1A CN104512947A (en) | 2014-12-17 | 2014-12-17 | Rolling type continuous electrodeionization device |
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| CN104512947A true CN104512947A (en) | 2015-04-15 |
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| CN201410779955.1A Pending CN104512947A (en) | 2014-12-17 | 2014-12-17 | Rolling type continuous electrodeionization device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1372998A (en) * | 2001-02-28 | 2002-10-09 | 中国科学院生态环境研究中心 | Coiled electrodialyzer |
| CN1666961A (en) * | 2004-03-10 | 2005-09-14 | 浙江欧美环境工程有限公司 | Rolling type electric desalter with stepping control function on input current |
| CN201771913U (en) * | 2010-09-14 | 2011-03-23 | 浙江晶泉水处理设备有限公司 | Spring retainer ring |
| CN202315712U (en) * | 2011-10-18 | 2012-07-11 | 珠海格力电器股份有限公司 | Pipeline type ultrafilter and household water purification system using same |
| CN102641663A (en) * | 2012-04-10 | 2012-08-22 | 何宗彦 | Motional electrodialysis equipment and water desalinating method |
| CN104192956A (en) * | 2014-08-15 | 2014-12-10 | 浙江中凯瑞普环境工程股份有限公司 | Roll electric demineralizer |
| CN204369622U (en) * | 2014-12-17 | 2015-06-03 | 湖州德翔环境科技有限公司 | Rolling continuous electrodeionization device |
-
2014
- 2014-12-17 CN CN201410779955.1A patent/CN104512947A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1372998A (en) * | 2001-02-28 | 2002-10-09 | 中国科学院生态环境研究中心 | Coiled electrodialyzer |
| CN1666961A (en) * | 2004-03-10 | 2005-09-14 | 浙江欧美环境工程有限公司 | Rolling type electric desalter with stepping control function on input current |
| CN201771913U (en) * | 2010-09-14 | 2011-03-23 | 浙江晶泉水处理设备有限公司 | Spring retainer ring |
| CN202315712U (en) * | 2011-10-18 | 2012-07-11 | 珠海格力电器股份有限公司 | Pipeline type ultrafilter and household water purification system using same |
| CN102641663A (en) * | 2012-04-10 | 2012-08-22 | 何宗彦 | Motional electrodialysis equipment and water desalinating method |
| CN104192956A (en) * | 2014-08-15 | 2014-12-10 | 浙江中凯瑞普环境工程股份有限公司 | Roll electric demineralizer |
| CN204369622U (en) * | 2014-12-17 | 2015-06-03 | 湖州德翔环境科技有限公司 | Rolling continuous electrodeionization device |
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Application publication date: 20150415 |