CN118978305A - An electrodeionization device - Google Patents
An electrodeionization device Download PDFInfo
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- CN118978305A CN118978305A CN202411465552.XA CN202411465552A CN118978305A CN 118978305 A CN118978305 A CN 118978305A CN 202411465552 A CN202411465552 A CN 202411465552A CN 118978305 A CN118978305 A CN 118978305A
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- 238000009296 electrodeionization Methods 0.000 title claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 266
- 239000013505 freshwater Substances 0.000 claims abstract description 139
- 239000012528 membrane Substances 0.000 claims abstract description 62
- 239000012141 concentrate Substances 0.000 claims description 62
- 238000005192 partition Methods 0.000 claims description 47
- -1 hydrogen ions Chemical class 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 21
- 229910052739 hydrogen Inorganic materials 0.000 claims description 17
- 239000001257 hydrogen Substances 0.000 claims description 17
- 239000003456 ion exchange resin Substances 0.000 claims description 13
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 13
- 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 claims description 12
- 238000002242 deionisation method Methods 0.000 claims description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 17
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 12
- 230000002378 acidificating effect Effects 0.000 abstract description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 6
- 238000001556 precipitation Methods 0.000 abstract description 5
- 238000010979 pH adjustment Methods 0.000 abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 26
- 230000008569 process Effects 0.000 description 24
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 12
- 238000001223 reverse osmosis Methods 0.000 description 12
- 150000001768 cations Chemical class 0.000 description 11
- 238000013461 design Methods 0.000 description 10
- 150000001450 anions Chemical class 0.000 description 9
- 229910002092 carbon dioxide Inorganic materials 0.000 description 8
- 239000001569 carbon dioxide Substances 0.000 description 8
- 230000005684 electric field Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000003014 ion exchange membrane Substances 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000010612 desalination reaction Methods 0.000 description 4
- 229910021389 graphene Inorganic materials 0.000 description 4
- 238000005342 ion exchange Methods 0.000 description 4
- 238000013508 migration Methods 0.000 description 4
- 230000005012 migration Effects 0.000 description 4
- 239000008213 purified water Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000003373 anti-fouling effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 description 2
- 229910000020 calcium bicarbonate Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010494 dissociation reaction Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000029219 regulation of pH Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000012498 ultrapure water Substances 0.000 description 2
- 239000003011 anion exchange membrane Substances 0.000 description 1
- 239000008364 bulk solution Substances 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/4691—Capacitive deionisation
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
本发明公开了一种电去离子装置，涉及净水设备技术领域，包括壳体，以及设于壳体内的PH调节腔和电去离子腔，所述PH调节腔内设有第一阳极板和第一阴极板，所述第一阳极板与第一阴极板之间依序交替设置有相等数量的导电膜和双极膜以形成交替的第一淡水室和第一浓水室，通过在电去离子腔上游设置一个PH调节腔，能够调节进入第二淡水室和第二浓水室的水的酸碱度，通过在淡水室形成碱性环境，使自身产生的OH‑与进入淡水室的CO2反应转变为碳酸根并迁移至浓水室被去除，同时在浓水室形成酸性环境，避免碳酸钙在浓水室结垢析出。
The invention discloses an electrodeionization device, which relates to the technical field of water purification equipment. The device comprises a shell, a pH adjustment chamber and an electrodeionization chamber arranged in the shell, wherein a first anode plate and a first cathode plate are arranged in the pH adjustment chamber, and an equal number of conductive membranes and bipolar membranes are alternately arranged between the first anode plate and the first cathode plate in sequence to form an alternating first fresh water chamber and a first concentrated water chamber. By arranging a pH adjustment chamber upstream of the electrodeionization chamber, the pH of water entering a second fresh water chamber and a second concentrated water chamber can be adjusted. By forming an alkaline environment in the fresh water chamber, OH generated by the device reacts with CO2 entering the fresh water chamber to be converted into carbonate ions and migrate to the concentrated water chamber for removal. At the same time, an acidic environment is formed in the concentrated water chamber to prevent calcium carbonate from scaling and precipitation in the concentrated water chamber.
Description
Technical Field
The invention relates to the technical field of water purifying equipment, in particular to an electrodeionization device.
Background
An Electrodeionization Device (EDI) is advanced water treatment technology equipment, and is mainly used for removing ionic impurities in water so as to obtain high-purity water. Conventional EDI is typically composed of a plurality of compartments including an anode compartment, a cathode compartment, a fresh water compartment, a concentrate compartment, and the like. Under the influence of the electric field, ions in the water migrate through the ion exchange membrane into the different compartments. Cations move to the cathode and enter the cathode chamber or the concentrate chamber through the cation exchange membrane; anions migrate toward the anode and pass through the anion exchange membrane into the anode or concentrate chambers. Meanwhile, ions in the water are further removed through the action of ion exchange resin in the fresh water chamber, so that high-purity fresh water is obtained.
The traditional EDI has higher requirements on the concentration and hardness of carbon dioxide in the water quality of the inlet water. Wherein the carbon dioxideIs an important factor affecting EDI operation, and is gaseousCannot be removed by RO membranes and enters downstream EDI systems whenWhen the concentration reaches a certain degree, the water quality of the system product water possibly cannot meet the high-purity water standard requirement. The common solution at present is to use an alkaline method in the water of the primary RO system product or between the water inlet passages of the secondary RO system, and increase the pH value of the water to enableThe conversion to carbonate for removal by RO requires the use of a two-stage RO process, resulting in nearly double the cost of the RO system. Meanwhile, EDI modules have strict requirements on the hardness of the water quality of the incoming water, and most of EDI modules only allow the total hardness to be about 1mg/L (toMeter), in some cases even lower. This is because the electrochemical regeneration of ion exchange resins can result in dissociation of the water resulting in a localized increase in pH and a greater potential for scaling than the bulk solution in areas such as near the surface of the ion exchange membrane. And because EDI water inflow requires the PH of water to be alkaline (fresh water room), the problem of scaling is more likely to occur in the concentrated water room.
Disclosure of Invention
The invention provides an electrodeionization device which can lead the electrodeionization device to enter a fresh water chamber in order to overcome the defects in the prior artThe reaction is converted into carbonate and is transferred to the concentrated water chamber to be removed, so that the water inlet requirement is relaxed, the water quality of produced water is improved, meanwhile, the scaling precipitation of calcium carbonate in the concentrated water chamber can be avoided, and the service life of the device is prolonged.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides an electrodeionization device, includes the casing, and locates PH regulation chamber and the electrodeionization chamber in the casing, PH regulation intracavity is equipped with first anode plate and first negative plate, be provided with equal quantity conductive film and bipolar membrane in proper order alternately between first anode plate and the first negative plate in order to form first fresh water chamber and first dense water chamber in turn, the one side that bipolar membrane produced hydrogen ion is towards first dense water chamber, the one side that bipolar membrane produced hydroxyl ion is towards first fresh water chamber, first anode plate with form first positive pole hydroecium between the conductive film, form first negative pole hydroecium between bipolar membrane and the first negative plate;
The electric deionization cavity is internally provided with a second anode water chamber, a second cathode water chamber, a plurality of second fresh water chambers and a plurality of second concentrated water chambers which are alternately arranged, wherein the first anode water chamber is communicated with the second anode water chamber, the first cathode water chamber is communicated with the second cathode water chamber, the first fresh water chamber is communicated with the second fresh water chamber, and the first concentrated water chamber is communicated with the second concentrated water chamber.
In the technical scheme, the bipolar membrane is an ion exchange membrane and is an anion-cation composite membrane prepared by compositing a cation membrane and an anion membrane. During the water separation process, the bipolar membrane can generate hydrogen ionsAnd hydroxide ions. The working principle of the electrodeionization device is as follows: and electrifying the first anode plate and the first cathode plate, and electrifying the second anode plate and the second cathode plate simultaneously, so that the PH adjusting cavity and the electrodeionization cavity are provided with direct current electric fields to pass through. Under the action of a direct current electric field, water molecules between an anion membrane and a cation membrane composite layer of a bipolar membrane in a PH adjusting cavity are dissociated into hydrogen ions and hydroxyl ions, the generated hydrogen ions of the bipolar membrane enter a first concentrated water chamber through the cation membrane on the bipolar membrane, the generated hydroxyl ions of the bipolar membrane enter a first fresh water chamber through the anion membrane on the bipolar membrane, and the hydroxyl ions in the first fresh water chamber enter a second fresh water chamber along with the first fresh water chamber due to the communication of the first fresh water chamber and the second fresh water chamber, and trace hydrogen ions in water are in the first fresh water chamber and the second fresh water chamberReact with hydroxyl ions to convert into carbonate ions. Under the action of a direct current electric field, anions (including carbonate ions) in the second fresh water chamber enter the second concentrated water chamber and the second anode water chamber, cations in the second fresh water chamber enter the second concentrated water chamber and the second cathode water chamber, and carbonate ions in the second concentrated water chamber enterAnd the water is discharged out of the second concentrated water chamber together with other components in the second concentrated water chamber for further treatment, discharge or recycling. Hydroxide ions generated in the chamber by pH adjustmentCan be used for reducing the amount of carbon dioxide in the second fresh water chamberConversion to carbonate ionsAnd migrate to the second concentrate chamber where cations (e.g.) After migrating to the first concentrate chamber, hydrogen ions generated in the pH adjusting chamberAlso in the first concentrated water chamber and the second concentrated water chamber, the first concentrated water chamber and the second concentrated water chamber are kept in an acidic environmentThereby avoiding the scaling precipitation of calcium carbonate in the first concentrated water chamber and the second concentrated water chamber. Carbonate ions in an acidic environmentWith hydrogen ionsCalcium bicarbonate produced by the reactionHas certain solubility in water and is not easy to precipitate out.
In the technical scheme, the PH adjusting cavity is arranged at the upstream of the electrodeionization cavity, so that the PH value of water entering the second fresh water chamber and the second concentrated water chamber can be adjusted, and the carbon dioxide in purified water exiting from the second fresh water chamber can be further adjustedThe purified water from the second fresh water chamber does not contain carbonate, and the carbonate is not required to be filtered through the RO membrane in the subsequent process, so that the cost of the water treatment device is saved. At the same time, hydrogen ions in the second concentrated water chamberThe PH value in the second concentrated water chamber can be kept acidic, the scaling precipitation of calcium carbonate in the concentrated water chamber can be avoided, and the problems of blocking of an ion exchange membrane and shortening of service life caused by scaling can be remarkably avoided. In the whole PH adjusting process, acidic substances and alkaline substances are not needed to be added, the sealing performance of the whole electrodeionization device is better, the anti-fouling capability is stronger, and the operation is more convenient. The scheme adopts the bipolar membrane to adjust the PH, can adjust the PH range through the mode of adjusting the current, can realize the function of automatically adjusting the PH. The electrodeionization device can effectively solve the problem that EDI has higher requirements on the concentration and hardness of carbon dioxide in water quality, lightens the water inlet requirement, prolongs the service life and improves the water quality of produced water. Primary reverse osmosis water production is generallyThe novel EDI membrane stack has the advantages that the standard is exceeded, the hardness is larger than 1mg/L, the secondary reverse osmosis process and the alkali adding process are not required to be added after the novel EDI membrane stack is adopted, the system cost is saved, and the quality of produced water is ensured. Meanwhile, the scaling of the concentrated water chamber can be avoided, and the service life of the membrane stack is prolonged.
Preferably, the PH adjusting cavity and the electrodeionization cavity form a containing cavity, an anode partition board and a cathode partition board are arranged in the containing cavity, and fresh water partition boards and concentrated water partition boards with equal numbers are alternately arranged between the anode partition board and the cathode partition board in sequence;
The conductive film adjacent to the anode separator is clamped between the anode separator and the fresh water separator adjacent to the anode separator, and the rest of the conductive film is clamped by the two adjacent fresh water separators and the concentrated water separator;
The bipolar membrane adjacent to the cathode separator is clamped between the cathode separator and the concentrate separator adjacent to the cathode separator, and the rest of the bipolar membrane is clamped by the two adjacent fresh water separators and the concentrate separator.
In the technical scheme, the conductive film and the bipolar film are clamped and fixed through the specific arrangement mode of the anode separator, the fresh water separator, the concentrated water separator and the cathode separator. The design is convenient for the installation and fixation of the conductive film and the bipolar film, and can ensure that the conductive film and the bipolar film are stable in position and good in isolation effect in the use process.
Preferably, the first anode water chamber, the second anode water chamber and a first separation plate for separating the first anode water chamber and the second anode water chamber are arranged on the anode separation plate, and a first communication hole for communicating the first anode water chamber and the second anode water chamber is arranged on the first separation plate;
And/or the cathode partition plate is provided with the first cathode water chamber, the second cathode water chamber and a second partition plate for separating the first cathode water chamber and the second cathode water chamber, and the second partition plate is provided with a second communication hole for communicating the first cathode water chamber and the second cathode water chamber;
and/or the fresh water partition plate is provided with the first fresh water chamber, the second fresh water chamber and a third partition plate for separating the first fresh water chamber and the second fresh water chamber, and the third partition plate is provided with a third communication hole for communicating the first fresh water chamber and the second fresh water chamber;
And/or the first concentrated water chamber, the second concentrated water chamber and a fourth partition plate for separating the first concentrated water chamber and the second concentrated water chamber are arranged on the concentrated water partition plate, and a fourth communication hole for communicating the first concentrated water chamber and the second concentrated water chamber is formed in the fourth partition plate.
Among the above-mentioned technical scheme, with first positive pole hydroecium and second positive pole hydroecium setting on the positive pole baffle, cut apart through first division board, simultaneously, because positive pole baffle, fresh water baffle, dense water baffle and negative pole baffle can press from both sides conductive film and bipolar membrane tightly and fix, only need through above-mentioned connection, alright realize the fast assembly to the interior membrane stack of electrodeionization device, and membrane stack simple structure, processing cost is low. In addition, the design can ensure smooth water flow between the water chambers, improves the working efficiency of the electrodeionization device, is convenient for independently controlling and maintaining the water chambers, and further enhances the reliability and stability of the device.
Preferably, the thickness of the anode separator is equal to the thickness of the first separator; and/or the thickness of the cathode separator is equal to the thickness of the second separator; and/or the thickness of the fresh water partition plate is equal to the thickness of the third partition plate; and/or the thickness of the thick water partition plate is equal to the thickness of the fourth partition plate.
The technical scheme can lead the structure of the partition plate to be more regular, is convenient to process and manufacture, and reduces the production cost. Meanwhile, the design of equal thickness can ensure the stability and reliability of the partition board in the use process, and avoid the problems of stress concentration or deformation and the like caused by inconsistent thickness. In addition, the same thickness can also enable each baffle to be more closely matched during assembly, and the overall performance and the sealing performance of the electrodeionization device are improved. In practical application, the first separator plate may clamp the edge of the male film, the second separator plate may clamp the edge of the female film, the third separator plate may clamp the edge of the conductive film or the bipolar film, and the fourth separator plate may clamp the edge of the other female film or the male film. The clamping mode can ensure the position stability of each film in the use process, and further improve the performance and stability of the electrodeionization device.
Preferably, a second anode plate and a second cathode plate are arranged in the electrodeionization cavity, and an equal number of negative films and positive films are alternately arranged between the second anode plate and the second cathode plate in sequence to form a second fresh water chamber and a second concentrated water chamber, a second anode water chamber is formed between the second anode plate and the negative films, and a second cathode water chamber is formed between the positive films and the second cathode plates.
Preferably, the system comprises two sets of direct current power supply systems, wherein the two sets of direct current power supply systems respectively supply power to a first anode plate, a first cathode plate in the PH adjusting cavity and a second anode plate and a second cathode plate in the electrodeionization cavity, so that currents in the PH adjusting cavity and the electrodeionization cavity can be independently controlled.
According to the technical scheme, the current can be independently regulated according to different requirements of the PH regulating cavity and the electrodeionization cavity, so that the working conditions of each cavity are optimized, and the overall performance and efficiency of the electrodeionization device are improved. Through the mode of adjusting current, the PH range can be adjusted, the function of automatically adjusting PH is realized, and the degree of automation and the stability of the device are further improved. Meanwhile, the flexibility and the adaptability of the device can be enhanced by independently controlling the current, so that the device can better cope with different water quality and treatment requirements.
Preferably, the PH adjusting cavity is filled with ion exchange resin; the electrodeionization cavity is filled with ion exchange resin.
In the technical scheme, the ion exchange resin can enhance the ion exchange capacity of the PH adjusting cavity and the electrodeionization cavity, and improves the desalination efficiency and the water quality purifying effect of the electrodeionization device. Meanwhile, the ion concentration in the cavity can be increased by filling the ion exchange resin, so that migration and exchange of ions are promoted, and the performance of the device is further improved.
Preferably, a plurality of the second fresh water chambers are arranged in parallel; and/or, a plurality of second concentrated water chambers are arranged in parallel.
In the technical scheme, the plurality of second fresh water chambers are connected in parallel, so that the treatment capacity and the flow rate of fresh water can be increased, and the water production efficiency of the electrodeionization device is improved; the second concentrated water chambers are connected in parallel, so that the concentrated water can be discharged more smoothly, the retention time of the concentrated water in the chambers is reduced, and the running stability and the reliability of the device are improved.
Preferably, the number of the first fresh water chambers is the same as that of the second fresh water chambers and is arranged in a one-to-one correspondence manner, and the first fresh water chambers are communicated with the corresponding second fresh water chambers; and/or, the number of the first concentrated water chambers is the same as that of the second concentrated water chambers and is set in one-to-one correspondence, and the first concentrated water chambers are communicated with the corresponding second concentrated water chambers.
The arrangement mode in the technical scheme enables the structure of the device to be more compact, the first fresh water chamber and the second fresh water chamber can be reasonably distributed in the same set of shell, the space is fully utilized, and the volume and the occupied area of the device are reduced. Meanwhile, the one-to-one communication mode ensures smooth flow of water flow, improves the efficiency of ion exchange and migration, and further improves the desalination effect and the water production quality of the electrodeionization device. In addition, the compact structural design is convenient for centralized management and control of each water chamber, and the operation stability and reliability of the device are improved.
Preferably, the number of the first fresh water chambers is one, the number of the second fresh water chambers is a plurality of the first fresh water chambers, and the first fresh water chambers are communicated with the second fresh water chambers through one-inlet-and-more-outlet fresh water pipelines; and/or the number of the first concentrated water chambers is one, the number of the second concentrated water chambers is a plurality of the first concentrated water chambers, and the first concentrated water chambers are communicated with the second concentrated water chambers through one-inlet-multiple-outlet concentrated water pipelines.
The technical scheme can realize reasonable distribution and transmission of fresh water and concentrated water, so that the water flows in the device more smoothly and efficiently. A first fresh water chamber is communicated with a plurality of second fresh water chambers through a fresh water pipeline, so that fresh water can be ensured to be uniformly distributed into each second fresh water chamber, and the treatment efficiency and quality of fresh water are improved. Also, one first concentrate chamber is communicated with a plurality of second concentrate chambers through a concentrate water pipeline, so that concentrate can be effectively collected and discharged. In addition, the structural design also enables the layout of the device to be more reasonable, occupies smaller space, and is beneficial to realizing the miniaturization and integration of the device. Meanwhile, the PH adjusting cavity and the electrodeionization cavity in the shell can be separated according to the requirement and then communicated through the pipeline. In this way, the functions of the two parts are relatively independent, on one hand, the control operation is convenient, and independent parameter adjustment and operation control can be respectively carried out on the PH adjusting cavity and the electrodeionization cavity so as to meet different processing requirements; on the other hand, when operations such as overhauling are more convenient, when one of them cavity goes wrong, can overhaul it alone, and need not the dismouting to the structure in the other cavity, reduced the degree of difficulty and the cost of overhauing, improved maintenance efficiency.
Preferably, the conductive film is a graphene film or a stainless steel film or a titanium alloy film.
In the technical scheme, the graphene has excellent conductivity and mechanical strength, can efficiently conduct current, and is not easy to damage in a long-term use process. The stainless steel film has good corrosion resistance and stability, and can adapt to various complex working environments. The titanium alloy film also has excellent corrosion resistance and high strength, and can ensure the stability of the conductive film in the electrodeionization process. According to different application scenes and requirements, a proper conductive film material can be selected to improve the performance and reliability of the electrodeionization device.
The beneficial effects of the invention are as follows: (1) Primary reverse osmosis water production is generallyExceeding standard, the novel electrodeionization device does not need to increase a secondary reverse osmosis process and an alkali adding process, saves the cost of a system and ensures the quality of produced water. (2) The hardness of the water produced by the first-stage reverse osmosis is more than 1mg/L, after the novel electrodeionization device is adopted, the scaling of the concentrated water chamber can be avoided, the hardness is reduced without increasing the second-stage reverse osmosis, and the service life of the membrane stack is prolonged. (3) The PH is adjusted by adopting the bipolar membrane, the PH range can be adjusted by adjusting the current, and the function of automatically adjusting the PH can be realized.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a second schematic diagram of the structure of the present invention;
FIG. 3 is an exploded view of a portion of the structure of the present invention;
FIG. 4 is a schematic view of the structure of the fresh water separator according to the present invention;
fig. 5 is a schematic structural view of a concentrate separator according to the present invention.
In the figure: the casing 1, the PH adjusting chamber 110, the first fresh water chamber 111, the first concentrate chamber 112, the first anode water chamber 113, the first cathode water chamber 114, the electrodeionization chamber 120, the second fresh water chamber 121, the second concentrate chamber 122, the second anode water chamber 123, the second cathode water chamber 124, the housing chamber 130, the first anode plate 11, the first cathode plate 12, the conductive film 13, the bipolar film 14, the second anode plate 21, the second cathode plate 22, the cathode film 23, the anode film 24, the anode separator 31, the first separator 311, the first communication hole 312, the cathode separator 32, the second separator 321, the second communication hole 322, the fresh water separator 33, the third separator 331, the third communication hole 332, the concentrate separator 34, the fourth separator 341, and the fourth communication hole 342.
Detailed Description
The invention is further described below with reference to the drawings and specific embodiments.
Example 1:
As shown in fig. 1 to 5, an electrodeionization device comprises a housing 1, and a PH adjusting chamber 110 and an electrodeionization chamber 120 which are arranged in the housing 1, wherein a first anode plate 11 and a first cathode plate 12 are arranged in the PH adjusting chamber 110, an equal number of conductive films 13 and bipolar films 14 are alternately arranged between the first anode plate 11 and the first cathode plate 12 in sequence to form an alternating first fresh water chamber 111 and a first concentrated water chamber 112, one side of the bipolar films 14 generating hydrogen ions faces the first concentrated water chamber 112, one side of the bipolar films 14 generating hydroxyl ions faces the first fresh water chamber 111, a first anode water chamber 113 is formed between the first anode plate 11 and the conductive films 13, and a first cathode water chamber 114 is formed between the bipolar films 14 and the first cathode plate 12; the electrodeionization chamber 120 is internally provided with a second anode water chamber 123, a second cathode water chamber 124, and a plurality of second fresh water chambers 121 and second concentrated water chambers 122 which are alternately arranged, the first anode water chamber 113 is communicated with the second anode water chamber 123, the first cathode water chamber 114 is communicated with the second cathode water chamber 124, the first fresh water chamber 111 is communicated with the second fresh water chamber 121, and the first concentrated water chamber 112 is communicated with the second concentrated water chamber 122.
Specifically, a second anode plate 21 and a second cathode plate 22 are disposed in the electrodeionization chamber 120, an equal number of cathode films 23 and anode films 24 are sequentially and alternately disposed between the second anode plate 21 and the second cathode plate 22 to form a second fresh water chamber 121 and a second concentrated water chamber 122, a second anode water chamber 123 is formed between the second anode plate 21 and the cathode film 23, and a second cathode water chamber 124 is formed between the anode film 24 and the second cathode plate 22. The water outlet end of the second fresh water chamber 121 is communicated with the water purifying port through a pipeline, and the water outlet end of the second concentrated water chamber 122, the water outlet end of the second anode water chamber 123 and the water outlet end of the second cathode water chamber 124 are communicated with the sewage port through pipelines.
In the above technical solution, the bipolar membrane 14 is an ion exchange membrane, which is an anion-cation composite membrane made by compositing a cation membrane and an anion membrane. Bipolar membrane 14 generates hydrogen ions during the water dissociation processAnd hydroxide ions. The working principle of the electrodeionization device is as follows: the first anode plate 11 and the first cathode plate 12 are energized, and the second anode plate 21 and the second cathode plate 22 are simultaneously energized, so that a direct current electric field passes through both the PH adjusting chamber 110 and the electrodeionization chamber 120. Under the action of a direct current electric field, water molecules between an anion membrane and a cation membrane composite layer of the bipolar membrane 14 in the PH adjusting cavity 110 are dissociated into hydrogen ions and hydroxyl ions, the generated hydrogen ions of the bipolar membrane 14 enter the first concentrated water chamber 112 through the cation membrane on the bipolar membrane 14, the generated hydroxyl ions of the bipolar membrane 14 enter the first dilute water chamber 111 through the anion membrane on the bipolar membrane 14, and the hydroxyl ions in the first dilute water chamber 111 enter the second dilute water chamber 121 along with the first dilute water chamber 111 due to the fact that the first dilute water chamber 111 is communicated with the second dilute water chamber 121, and trace hydrogen ions in water enter the first dilute water chamber 111 and the second dilute water chamber 121React with hydroxyl ions to convert into carbonate ions. Under the action of the direct current electric field, anions (including carbonate ions) in the second fresh water chamber 121 enter the second concentrated water chamber 122 and the second anode water chamber 123 through the negative film 23 in the electrodeionization chamber 120, and cations in the second fresh water chamber 121 enter the second concentrated water chamber 122 and the second cathode water chamber 124 through the positive film 24 in the electrodeionization chamber 120, and carbonate ions enter the second concentrated water chamber 122Is discharged out of the second concentrate chamber 122 for further processing, draining or recycling along with other components within the second concentrate chamber 122. By hydroxide ions generated in the pH adjusting chamber 110A small amount of carbon dioxide in the second fresh water chamber 121 can be reducedConversion to carbonate ionsAnd migrates to the second concentrate chamber 122 where cations (e.g.) After migrating to the first concentrate chamber 112, hydrogen ions are generated in the pH adjusting chamber 110 due to the hydrogen ionsAlso within the first concentrate chamber 112 and the second concentrate chamber 122, the first concentrate chamber 112 and the second concentrate chamber 122 are maintained in an acidic environmentThereby avoiding the precipitation of calcium carbonate by scaling in the first concentrate chamber 112 and the second concentrate chamber 122. Carbonate ions in an acidic environmentWith hydrogen ionsCalcium bicarbonate produced by the reactionHas certain solubility in water and is not easy to precipitate out.
In the above technical solution, by providing a PH adjusting chamber 110 upstream of the electrodeionization chamber 120, the PH of the water entering the second fresh water chamber 121 and the second concentrate chamber 122 can be adjusted, so that the carbon dioxide in the purified water exiting the second fresh water chamber 121Is removed, and the purified water from the second fresh water chamber 121 does not contain carbonate, so that the carbonate does not need to be filtered through an RO membrane in the subsequent process, and the cost of the water treatment device is saved. Meanwhile, the hydrogen ions in the second concentrate chamber 122The PH in the second concentrate chamber 122 can also be kept acidic, so that calcium carbonate can be prevented from scaling and precipitating in the concentrate chamber, and the problems of blocking and shortening the service life of the ion exchange membrane caused by scaling can be remarkably avoided. In the whole PH adjusting process, acidic substances and alkaline substances are not needed to be added, the sealing performance of the whole electrodeionization device is better, the anti-fouling capability is stronger, and the operation is more convenient. The solution adopts the bipolar membrane 14 to adjust the PH, and the PH range can be adjusted by adjusting the current, so that the function of automatically adjusting the PH can be realized. The electrodeionization device can effectively solve the problem that EDI has higher requirements on the concentration and hardness of carbon dioxide in water quality, lightens the water inlet requirement, prolongs the service life and improves the water quality of produced water. Primary reverse osmosis water production is generallyThe novel EDI membrane stack has the advantages that the standard is exceeded, the hardness is larger than 1mg/L, the secondary reverse osmosis process and the alkali adding process are not required to be added after the novel EDI membrane stack is adopted, the system cost is saved, and the quality of produced water is ensured. Meanwhile, the scaling of the concentrated water chamber can be avoided, and the service life of the membrane stack is prolonged.
Specifically, the PH adjusting chamber 110 and the electrodeionization chamber 120 form a containing chamber 130, an anode separator 31 and a cathode separator 32 are disposed in the containing chamber 130, and an equal number of fresh water separators 33 and concentrated water separators 34 are alternately disposed between the anode separator 31 and the cathode separator 32 in sequence; the conductive film 13 adjacent to the anode separator 31 is sandwiched between the anode separator 31 and the fresh water separator 33 adjacent to the anode separator 31, and the remaining conductive film 13 is sandwiched between the adjacent two fresh water separators 33 and the concentrate separator 34; the bipolar membrane 14 adjacent to the cathode separator 32 is sandwiched between the cathode separator 32 and the concentrate separator 34 adjacent to the cathode separator 32, and the remaining bipolar membrane 14 is sandwiched between the adjacent two fresh water separators 33 and concentrate separators 34.
Preferably, the anode separator 31 is provided with the first anode water chamber 113, the second anode water chamber 123, and a first separator 311 for separating the first anode water chamber 113 and the second anode water chamber 123, and the first separator 311 is provided with a first communication hole 312 for communicating the first anode water chamber 113 and the second anode water chamber 123; the cathode separator 32 is provided with the first cathode water chamber 114, the second cathode water chamber 124 and a second separator 321 for separating the first cathode water chamber 114 and the second cathode water chamber 124, and the second separator 321 is provided with a second communication hole 322 for communicating the first cathode water chamber 114 and the second cathode water chamber 124; the fresh water separator 33 is provided with the first fresh water chamber 111, the second fresh water chamber 121 and a third separator 331 for separating the first fresh water chamber and the second fresh water chamber, and the third separator 331 is provided with a third communication hole 332 for communicating the first fresh water chamber 111 and the second fresh water chamber 121; the first concentrate chamber 112, the second concentrate chamber 122, and a fourth partition plate 341 for separating the first concentrate chamber 112 and the second concentrate chamber 122 are disposed on the concentrate partition plate 34, and a fourth communication hole 342 for communicating the first concentrate chamber 112 and the second concentrate chamber 122 is disposed on the fourth partition plate 341.
In the above-described embodiments, the conductive film 13 and the bipolar film 14 are clamped and fixed by the specific arrangement of the anode separator 31, the fresh water separator 33, the concentrate separator 34, and the cathode separator 32. The design is convenient for the installation and fixation of the conductive film 13 and the bipolar film 14, and can ensure the stable positions of the conductive film 13 and the bipolar film 14 in the use process, and the isolation effect is good. The anode separator 31, the fresh water separator 33, the concentrate separator 34, and the cathode separator 32 are each provided with channels for inflow and outflow of liquid. The first anode water chamber 113 and the second anode water chamber 123 are arranged on the anode partition plate 31 and are divided by the first partition plate 311, meanwhile, the conductive film 13 and the bipolar film 14 can be clamped and fixed by the anode partition plate 31, the fresh water partition plate 33, the concentrated water partition plate 34 and the cathode partition plate 32, and the rapid assembly of the inner film stack of the electrodeionization device can be realized only through the connection, and the film stack has a simple structure and low processing cost. In addition, the design can ensure smooth water flow between the water chambers, improves the working efficiency of the electrodeionization device, is convenient for independently controlling and maintaining the water chambers, and further enhances the reliability and stability of the device.
Preferably, the thickness of the anode separator 31 is equal to the thickness of the first separator 311; the thickness of the cathode separator 32 is equal to the thickness of the second separator 321; the thickness of the fresh water partition 33 is equal to the thickness of the third partition 331; the thickness of the concentrate spacer 34 is equal to the thickness of the fourth spacer 341.
The technical scheme can lead the structure of the partition plate to be more regular, is convenient to process and manufacture, and reduces the production cost. Meanwhile, the design of equal thickness can ensure the stability and reliability of the partition board in the use process, and avoid the problems of stress concentration or deformation and the like caused by inconsistent thickness. In addition, the same thickness can also enable each baffle to be more closely matched during assembly, and the overall performance and the sealing performance of the electrodeionization device are improved. In practical applications, the first separator 311 may clamp the edge of the anode film 24, the second separator 321 may clamp the edge of the cathode film 23, the third separator 331 may clamp the edge of the conductive film 13 or the bipolar film 14, and the fourth separator 341 may clamp the edge of the other Zhang Yinmo or the anode film 24. The clamping mode can ensure the position stability of each film in the use process, and further improve the performance and stability of the electrodeionization device.
Specifically, the PH adjusting chamber 110 is filled with an ion exchange resin; the electrodeionization chamber 120 is filled with ion exchange resin. In the above technical solution, the ion exchange resin can enhance the ion exchange capacity of the PH adjusting chamber and the electrodeionization chamber 120, and improve the desalination efficiency and water purification effect of the electrodeionization apparatus. Meanwhile, the ion concentration in the cavity can be increased by filling the ion exchange resin, so that migration and exchange of ions are promoted, and the performance of the device is further improved. The ion exchange resin is a mixed resin of a positive resin and a negative resin.
Specifically, the conductive film 13 is a graphene film or a stainless steel film or a titanium alloy film. In the technical scheme, the graphene has excellent conductivity and mechanical strength, can efficiently conduct current, and is not easy to damage in a long-term use process. The stainless steel film has good corrosion resistance and stability, and can adapt to various complex working environments. The titanium alloy film also has excellent corrosion resistance and high strength, and can ensure the stability of the conductive film 13 during electrodeionization. According to different application scenes and requirements, the proper material of the conductive film 13 can be selected to improve the performance and reliability of the electrodeionization device.
In one embodiment, the electrodeionization device further comprises two sets of dc power supply systems that supply power to the first anode plate 11, the first cathode plate 12, and the second anode plate 21 and the second cathode plate 22, respectively, within the PH adjusting chamber 110 and the electrodeionization chamber 120 to enable independent control of the current in the PH adjusting chamber 110 and the electrodeionization chamber 120.
The above technical solution can independently adjust the current according to different requirements of the PH adjusting chamber and the electrodeionization chamber 120, thereby optimizing the working conditions of each chamber and improving the overall performance and efficiency of the electrodeionization device. Through the mode of adjusting current, the PH range can be adjusted, the function of automatically adjusting PH is realized, and the degree of automation and the stability of the device are further improved. Meanwhile, the flexibility and the adaptability of the device can be enhanced by independently controlling the current, so that the device can better cope with different water quality and treatment requirements.
It will be appreciated that in another embodiment, it may also be: the first anode plate 11, the first cathode plate 12, and the second anode plate 21 and the second cathode plate 22 in the PH adjusting chamber 110 and the electrodeionization chamber 120 share a set of dc power supply system.
In one embodiment, a plurality of the second fresh water chambers 121 are arranged in parallel; a plurality of the second concentrate chambers 122 are arranged in parallel. In the above technical solution, the plurality of second fresh water chambers 121 are connected in parallel to increase the throughput and flow rate of fresh water, and improve the water production efficiency of the electrodeionization device; the plurality of second concentrate chambers 122 are connected in parallel, so that the discharge of the concentrate is smoother, the retention time of the concentrate in the chambers is reduced, and the operation stability and reliability of the device are improved.
It will be appreciated that in another embodiment, the number of the first fresh water chambers 111 is the same as the number of the second fresh water chambers 121 and is arranged in a one-to-one correspondence, and the first fresh water chambers 111 are communicated with the corresponding second fresh water chambers 121; the number of the first concentrate chambers 112 is the same as that of the second concentrate chambers 122 and is set in a one-to-one correspondence, and the first concentrate chambers 112 are communicated with the corresponding second concentrate chambers 122. The arrangement mode in the above technical scheme makes the structure of the device more compact, and the first fresh water chamber 111 and the second fresh water chamber 121 can be reasonably arranged in the same set of housing, so that the space is fully utilized, and the volume and the occupied area of the device are reduced. Meanwhile, the one-to-one communication mode ensures smooth flow of water flow, improves the efficiency of ion exchange and migration, and further improves the desalination effect and the water production quality of the electrodeionization device. In addition, the compact structural design is convenient for centralized management and control of each water chamber, and the operation stability and reliability of the device are improved.
It will be appreciated that in another embodiment, the number of the first fresh water chambers 111 is one, the number of the second fresh water chambers 121 is a plurality, and the first fresh water chambers 111 are communicated with the second fresh water chambers 121 through one-inlet-multiple-outlet fresh water pipelines; the number of the first concentrate chambers 112 is one, the number of the second concentrate chambers 122 is a plurality, and the first concentrate chambers 112 are communicated with the second concentrate chambers 122 through a one-inlet-multiple-outlet concentrate water pipeline. The technical scheme can realize reasonable distribution and transmission of fresh water and concentrated water, so that the water flows in the device more smoothly and efficiently. The first fresh water chamber 111 is communicated with the plurality of second fresh water chambers 121 through the fresh water pipeline, so that fresh water can be ensured to be uniformly distributed into the second fresh water chambers 121, and the treatment efficiency and quality of fresh water can be improved. Also, one first concentrate chamber 112 communicates with a plurality of second concentrate chambers 122 through a concentrate water pipeline, and can effectively collect and drain concentrate. In addition, the structural design also enables the layout of the device to be more reasonable, occupies smaller space, and is beneficial to realizing the miniaturization and integration of the device. Meanwhile, the PH adjusting chamber and the electrodeionization chamber 120 in the housing 1 may be separately provided as needed, and then communicated through a pipe. In this way, the functions of the two parts are relatively independent, on one hand, the control operation is convenient, and independent parameter adjustment and operation control can be respectively carried out on the PH adjusting cavity and the electrodeionization cavity 120 so as to meet different processing requirements; on the other hand, when operations such as overhauling are more convenient, when one of them cavity goes wrong, can overhaul it alone, and need not the dismouting to the structure in the other cavity, reduced the degree of difficulty and the cost of overhauing, improved maintenance efficiency.
The beneficial effects of the invention are as follows: (1) Primary reverse osmosis water production is generallyExceeding standard, the novel electrodeionization device does not need to increase a secondary reverse osmosis process and an alkali adding process, saves the cost of a system and ensures the quality of produced water. (2) The hardness of the water produced by the first-stage reverse osmosis is more than 1mg/L, after the novel electrodeionization device is adopted, the scaling of the concentrated water chamber can be avoided, the hardness is reduced without increasing the second-stage reverse osmosis, and the service life of the membrane stack is prolonged. (3) The pH is adjusted by the bipolar membrane 14, and the pH range can be adjusted by adjusting the current, so that the function of automatically adjusting the pH can be realized.
Claims (10)
1. The electric deionization device is characterized by comprising a shell, a PH adjusting cavity and an electric deionization cavity, wherein the PH adjusting cavity and the electric deionization cavity are arranged in the shell, a first anode plate and a first cathode plate are arranged in the PH adjusting cavity, an equal number of conductive films and bipolar films are alternately arranged between the first anode plate and the first cathode plate in sequence to form alternating first dilute chambers and first concentrated chambers, one side of the bipolar film, which generates hydrogen ions, faces the first concentrated chambers, one side of the bipolar film, which generates hydroxyl ions, faces the first dilute chambers, a first anode water chamber is formed between the first anode plate and the conductive film, and a first cathode water chamber is formed between the bipolar film and the first cathode plate;
The electric deionization cavity is internally provided with a second anode water chamber, a second cathode water chamber, a plurality of second fresh water chambers and a plurality of second concentrated water chambers which are alternately arranged, wherein the first anode water chamber is communicated with the second anode water chamber, the first cathode water chamber is communicated with the second cathode water chamber, the first fresh water chamber is communicated with the second fresh water chamber, and the first concentrated water chamber is communicated with the second concentrated water chamber.
2. The electrodeionization device of claim 1, wherein the PH adjusting chamber and the electrodeionization chamber form a receiving chamber, an anode separator and a cathode separator are disposed in the receiving chamber, and an equal number of fresh water separators and concentrated water separators are alternately disposed between the anode separator and the cathode separator in sequence;
The conductive film adjacent to the anode separator is clamped between the anode separator and the fresh water separator adjacent to the anode separator, and the rest of the conductive film is clamped by the two adjacent fresh water separators and the concentrated water separator;
The bipolar membrane adjacent to the cathode separator is clamped between the cathode separator and the concentrate separator adjacent to the cathode separator, and the rest of the bipolar membrane is clamped by the two adjacent fresh water separators and the concentrate separator.
3. The electrodeionization apparatus of claim 2, wherein the anode separator is provided with the first anode water chamber, the second anode water chamber, and a first separator for separating the first anode water chamber and the second anode water chamber, and wherein the first separator is provided with a first communication hole for communicating the first anode water chamber and the second anode water chamber;
And/or the cathode partition plate is provided with the first cathode water chamber, the second cathode water chamber and a second partition plate for separating the first cathode water chamber and the second cathode water chamber, and the second partition plate is provided with a second communication hole for communicating the first cathode water chamber and the second cathode water chamber;
and/or the fresh water partition plate is provided with the first fresh water chamber, the second fresh water chamber and a third partition plate for separating the first fresh water chamber and the second fresh water chamber, and the third partition plate is provided with a third communication hole for communicating the first fresh water chamber and the second fresh water chamber;
And/or the first concentrated water chamber, the second concentrated water chamber and a fourth partition plate for separating the first concentrated water chamber and the second concentrated water chamber are arranged on the concentrated water partition plate, and a fourth communication hole for communicating the first concentrated water chamber and the second concentrated water chamber is formed in the fourth partition plate.
4. An electrodeionization apparatus according to claim 3 wherein the thickness of the anode separator is equal to the thickness of the first separator; and/or the thickness of the cathode separator is equal to the thickness of the second separator; and/or the thickness of the fresh water partition plate is equal to the thickness of the third partition plate; and/or the thickness of the thick water partition plate is equal to the thickness of the fourth partition plate.
5. The electrodeionization device of claim 1, wherein a second anode plate and a second cathode plate are disposed in the electrodeionization chamber, and an equal number of cathode and anode membranes are alternately disposed between the second anode plate and the second cathode plate in sequence to form the second dilute chamber and the second concentrate chamber, wherein the second anode chamber is formed between the second anode plate and the cathode membrane, and the second cathode chamber is formed between the anode membrane and the second cathode plate.
6. The electrodeionization device of claim 1, comprising two sets of dc power supply systems that supply power to the first anode plate, the first cathode plate, and the second anode plate and the second cathode plate, respectively, in the PH adjusting chamber to enable independent control of the current in the PH adjusting chamber and the electrodeionization chamber.
7. An electrodeionization apparatus according to claim 1 wherein said PH adjusting chamber is filled with ion exchange resin; the electrodeionization cavity is filled with ion exchange resin.
8. An electrodeionization apparatus according to claim 1 wherein a plurality of said second fresh water compartments are arranged in parallel; and/or, a plurality of second concentrated water chambers are arranged in parallel.
9. The electrodeionization device of claim 1, wherein the number of first dilute chambers is the same as the number of second dilute chambers and is arranged in a one-to-one correspondence, and wherein the first dilute chambers are in communication with the corresponding second dilute chambers; and/or, the number of the first concentrated water chambers is the same as that of the second concentrated water chambers and is set in one-to-one correspondence, and the first concentrated water chambers are communicated with the corresponding second concentrated water chambers.
10. The electrodeionization apparatus of claim 1, wherein the number of first fresh water chambers is one and the number of second fresh water chambers is a plurality, the first fresh water chambers being in communication with the second fresh water chambers via a fresh water line; and/or the number of the first concentrated water chambers is one, the number of the second concentrated water chambers is a plurality of the first concentrated water chambers, and the first concentrated water chambers are communicated with the second concentrated water chambers through one-inlet-multiple-outlet concentrated water pipelines.
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| CN202411465552.XA CN118978305A (en) | 2024-10-21 | 2024-10-21 | An electrodeionization device |
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| CN202411465552.XA CN118978305A (en) | 2024-10-21 | 2024-10-21 | An electrodeionization device |
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| US6056878A (en) * | 1998-08-03 | 2000-05-02 | E-Cell Corporation | Method and apparatus for reducing scaling in electrodeionization systems and for improving efficiency thereof |
| KR20020065821A (en) * | 2001-02-07 | 2002-08-14 | 황성길 | Electrodialysis unit for removing carbon dioxide and carbon dioxide removal system using the same |
| JP2003024948A (en) * | 2001-07-19 | 2003-01-28 | Nippon Rensui Co Ltd | Pure water production method and electric regeneration type pure water production equipment |
| CN104603067A (en) * | 2012-08-27 | 2015-05-06 | 默克专利股份公司 | Improved electrodeionization module and apparatus |
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- 2024-10-21 CN CN202411465552.XA patent/CN118978305A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6056878A (en) * | 1998-08-03 | 2000-05-02 | E-Cell Corporation | Method and apparatus for reducing scaling in electrodeionization systems and for improving efficiency thereof |
| CN1311709A (en) * | 1998-08-03 | 2001-09-05 | E-Cell公司 | Method for reducing scaling in electrodeionization system |
| KR20020065821A (en) * | 2001-02-07 | 2002-08-14 | 황성길 | Electrodialysis unit for removing carbon dioxide and carbon dioxide removal system using the same |
| JP2003024948A (en) * | 2001-07-19 | 2003-01-28 | Nippon Rensui Co Ltd | Pure water production method and electric regeneration type pure water production equipment |
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