Electrodeionization chamber structure

Abstract

This application relates to the field of water treatment technology, and in particular to an electrostatic desalination chamber structure. The electrostatic desalination chamber structure includes: an anode plate, with an anolyte chamber formed on one side of the anode plate; a cathode plate, spaced apart from the anode plate; at least one concentrate chamber; and at least one desalination chamber, with each concentrate chamber and each desalination chamber alternately arranged between the anode plate and the cathode plate along a first direction. The anolyte chamber is disposed between the anode plate and the concentrate chamber, separating the anolyte chamber from the first desalination chamber. The electrostatic desalination chamber structure provided by this application, by setting a concentrate chamber between the anolyte chamber and the desalination chamber, effectively avoids the oxidation of the desalination chamber caused by the increase in the valence of reducing ions in the anolyte chamber after the anode plate reaches a redox potential. This reduces the risk of damage to the anode membrane, extends the membrane's service life, and ensures high-quality water production and long-term stable operation of the equipment.

Description

Technical Field

[0001] This application relates to the field of water treatment technology, and in particular to an electro-desalination chamber structure. Background Technology

[0002] Electrodialysis (EDI) is a perfect combination of electrodialysis and ion exchange technologies. It utilizes a direct current electric field to efficiently remove ions from water. Due to its high efficiency, continuous operation, and environmental friendliness, EDI technology is known as a "green water treatment technology." The two ends of an EDI device are anode and cathode. The chamber connected to the anode and cathode is called the electrode water chamber. During operation, an oxidation reaction occurs at the anode, increasing the oxidation state of reducing ions in the water, especially chloride ions, which are oxidized into high-valence ions or compounds with oxidizing properties. This causes irreversible damage to the anode membrane adjacent to the electrode water chamber, affecting the quality of the produced water and the stable operation of the system. Utility Model Content

[0003] The purpose of this application is to provide an electro-desalination chamber structure to solve, to some extent, the technical problem that the electrode water chamber and the anode membrane adjacent to the electrode water chamber are easily damaged during the operation of the existing electro-desalination device.

[0004] This application provides an electro-desalination chamber structure, including: an anode plate, wherein an anode water chamber is formed on one side of the anode plate;

[0005] A cathode plate, wherein the cathode plate and the anode plate are spaced apart;

[0006] A concentrate chamber, wherein the number of the concentrate chambers is at least one;

[0007] The freshwater chamber is at least one in number, and each of the concentrated water chambers and each of the freshwater chambers are alternately arranged between the anode plate and the cathode plate along a first direction;

[0008] The anode water chamber is disposed between the anode plate and the concentrate chamber, and the concentrate chamber separates the anode water chamber from the first freshwater chamber.

[0009] In any of the above technical solutions, the electro-desalination chamber structure further includes a cathode water chamber, which is disposed on the side of the cathode plate facing the anode plate, and is located at the end of all the concentrate chambers and all the desalination chambers.

[0010] In any of the above technical solutions, the electro-desalination chamber structure further includes multiple concentrate plates, each concentrate plate being provided with a concentrate chamber and a cathode membrane.

[0011] The concentrate plate is provided with a first inlet and a first outlet, which are respectively connected to the concentrate chamber.

[0012] In any of the above technical solutions, the electro-desalination chamber structure further includes multiple freshwater plates, each freshwater plate being provided with a freshwater chamber and an anode membrane.

[0013] The freshwater plate is provided with a second inlet and a second outlet, which are respectively connected to the freshwater chamber.

[0014] In any of the above technical solutions, the height of the first inlet is lower than the height of the first outlet.

[0015] The height of the second inlet is higher than the height of the second outlet.

[0016] In any of the above technical solutions, the electro-desalination chamber structure further includes:

[0017] An anode partition, wherein the anode partition is provided with the anode water chamber, and another cathode membrane is provided on the anode partition;

[0018] The anode partition is provided with a third water inlet and a third water outlet, which are respectively connected to the anode water chamber;

[0019] The third water inlet is connected to the first water inlet, and the third water outlet is connected to the first water outlet.

[0020] In any of the above technical solutions, the electro-desalination chamber structure further includes a cathode partition, and the cathode partition is provided with the cathode water chamber;

[0021] The cathode partition is provided with a fourth water inlet and a fourth water outlet, which are respectively connected to the cathode water chamber; the fourth water inlet is connected to the first water inlet, and the fourth water outlet is connected to the first water outlet.

[0022] In any of the above technical solutions, the electro-desalination chamber structure further includes:

[0023] The anode plate is provided with a fresh water inlet and a concentrated water inlet. The fresh water inlet is connected to the second water inlet. The concentrated water inlet is connected to the third water inlet and the first water inlet.

[0024] The cathode plate is provided with a fresh water outlet and a concentrated water outlet. The fresh water outlet is connected to the second water outlet. The concentrated water outlet is connected to the fourth water outlet and the first water outlet.

[0025] In any of the above technical solutions, the desalination chamber, the concentrate chamber, the anolyte chamber, and the cathode chamber are further filled with ion exchange resin.

[0026] In any of the above technical solutions, the flux of the anode water chamber is further equal to the flux of the concentrate chamber.

[0027] Compared with the prior art, the beneficial effects of this application are as follows:

[0028] The electro-desalination chamber structure provided in this application includes: an anode plate, with an anode water chamber formed on one side of the anode plate; a cathode plate, with the cathode plate and the anode plate spaced apart; a concentrate chamber, with at least one concentrate chamber; and a desalination chamber, with at least one desalination chamber, each concentrate chamber and each desalination chamber being alternately arranged between the anode plate and the cathode plate along a first direction; the anode water chamber is disposed between the anode plate and the concentrate chamber, and the concentrate chamber separates the anode water chamber from the first desalination chamber.

[0029] The electro-desalination chamber structure provided in this application includes a concentrate chamber between the anode water chamber and the desalination chamber. This concentrate chamber separates the anode water chamber from the adjacent desalination chamber, effectively preventing the oxidation of the desalination chamber caused by the increase in the oxidation state of reducing ions in the anode water chamber after the anode plate reaches a redox potential. This reduces the risk of anode membrane damage, extends membrane lifespan, and ensures high-quality water production and long-term stable operation of the equipment. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the electro-desalination chamber provided in the embodiment of this application.

[0032] Figure label:

[0033] 1-Anode plate, 2-Anode water chamber, 3-Concentrate chamber, 4-Cathode membrane, 5-Desalinated water chamber, 6-Anode membrane, 7-Cathode water chamber, 8-Cathode plate, 9-Desalinated water inlet pipe, 10-Concentrate inlet pipe, 11-Desalinated water outlet pipe, 12-Concentrate outlet pipe, 13-Ion exchange resin. Detailed Implementation

[0034] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0035] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0036] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] The following reference Figure 1 The electro-desalination chamber structure described in the embodiments of this application is illustrated.

[0040] See Figure 1As shown, an embodiment of this application provides an electrostatic desalination chamber structure, which includes: an anode plate 1, a cathode plate 8, a concentrate chamber 3, a desalination chamber 5, and an anolyte chamber 2. The anode plate 1 and the cathode plate 8 are spaced apart and face each other. Preferably, there are multiple concentrate chambers 3 and multiple desalination chambers 5, which are alternately arranged between the anode plate 1 and the cathode plate 8 along a first direction. Specifically, the first direction is the direction from the anode plate 1 to the cathode plate 8. The anolyte chamber 2 is located on the side of the anode plate 1 facing the cathode plate 8. Between the anode plate 1 and the cathode plate 8, the chambers are arranged sequentially according to the pattern of anolyte chamber 2-concentrate chamber 3-desalination chamber 5-concentrate chamber 3-desalination chamber 5… This ensures that a first concentrate chamber 3 is positioned between the anolyte chamber 2 and the first desalination chamber 5, effectively separating the anolyte chamber 2 from the first desalination chamber 5 during the oxidation reaction at the anode, thus preventing damage to the adjacent anode membrane 6.

[0041] Specifically, the electrostatic desalination chamber structure includes multiple cathode membranes 4 and multiple anode membranes 6. The cathode membranes 4 and anode membranes 6 are alternately arranged along a first direction in a pattern of cathode membrane 4-anode membrane 6-cathode membrane 4-anode membrane 6… Furthermore, another cathode membrane 4 is disposed between the first cathode membrane 4 and the anode plate 1, resulting in a sequential formation of an anode water chamber 2-concentrate chamber 3-desalinate chamber 5-concentrate chamber 3-desalinate chamber 5… on the side of the anode plate 1. It should be noted that the cathode membrane 4 in this embodiment is a common anion exchange membrane in the prior art, and the anode membrane 6 is a common cation exchange membrane in the prior art.

[0042] Furthermore, the electro-desalination chamber structure also includes a cathode water chamber 7, which is located on the side of the cathode plate 8 facing the anode plate 1.

[0043] Furthermore, the anolyte chamber 2, each concentrate chamber 3, each desalinate chamber 5, and the cathode chamber 7 are each filled with ion exchange resin 13. Preferably, in this embodiment, a resin commonly used in the prior art with high temperature resistance and oxidation resistance is selected to reduce the probability of resin breakage.

[0044] Furthermore, the electrostatic desalination chamber structure also includes a concentrate plate, a portion of which is hollow to form a concentrate chamber 3. A cathode membrane 4 is disposed on the side of the concentrate plate facing the cathode plate 8 and covers the concentrate chamber 3. The concentrate plate is provided with a first inlet, a first inlet channel, a first outlet, and a first outlet channel. The first inlet is connected to the concentrate chamber 3 through the first inlet channel, and the first outlet is connected to the concentrate chamber 3 through the first outlet channel. All concentrate plates have the same structure.

[0045] Preferably, the length of the concentrate plate extends vertically, the first inlet is located below the concentrate chamber 3 near the bottom of the concentrate plate, and the first outlet is located above the concentrate chamber 3 near the top of the concentrate chamber 3, so that the concentrate flows in from bottom to top, which is conducive to the discharge of gas in the concentrate chamber 3 and reduces the risk of gas oxidizing the resin and membrane.

[0046] Furthermore, the electro-desalination chamber structure also includes a freshwater plate, which has the same shape as the concentrated water plate. A portion of the freshwater plate is hollow to form a freshwater chamber 5. An anode membrane 6 is disposed on the side of the freshwater chamber 5 facing the cathode plate 8, and the anode membrane 6 covers the freshwater chamber 5. The freshwater plate is provided with a second inlet, a second inlet channel, a second outlet, and a second outlet channel. The second inlet is connected to the freshwater chamber 5 through the second inlet channel, and the second outlet is connected to the freshwater chamber 5 through the second outlet channel. Preferably, the second inlet is located above the freshwater chamber 5, and the second outlet is located below the freshwater chamber 5.

[0047] Furthermore, the concentrate plate is also provided with two first connecting holes. One first connecting hole is located on the side of the first inlet, directly opposite the second outlet of the adjacent freshwater plate; the other first connecting hole is located on the side of the first outlet, directly opposite the second inlet of the adjacent freshwater plate. Neither of the two first connecting holes communicates with the first inlet channel, the first outlet channel, or the concentrate chamber 3. The freshwater plate is also provided with two second connecting holes. One second connecting hole is located on the side of the second inlet, directly opposite the adjacent first outlet; the other second connecting hole is located on the side of the second outlet, directly opposite the adjacent first inlet. Neither of the two second connecting holes communicates with the second inlet channel, the second outlet channel, or the freshwater chamber 5. This configuration allows the second inlets of two adjacent freshwater plates to be connected through the first connecting hole of the concentrate plate between them, and the second outlets of two adjacent freshwater plates to be connected through another first connecting hole of the concentrate plate between them. At the same time, the first inlets of two adjacent concentrate plates are connected through one second connecting hole, and the first outlets of two adjacent concentrate plates are connected through another second connecting hole. This enables all the first inlets of the concentrate plates to be connected sequentially along the first direction, all the first outlets of the concentrate plates to be connected sequentially along the first direction, all the second inlets of the freshwater plates to be connected sequentially along the first direction, and all the second outlets of the freshwater plates to be connected sequentially.

[0048] Furthermore, the electro-desalination chamber structure also includes an anode partition, which is disposed on the side of the anode plate 1 near the cathode plate 8. The interior of the anode partition is hollow, forming an anode water chamber 2. A cathode membrane 4 is disposed on the side of the anode partition facing the first concentrate chamber 3. The anode partition is also provided with a third inlet, a third outlet, a third inlet channel, a third outlet channel, and a third connecting hole. The third inlet is directly opposite the first inlet of the adjacent first concentrate plate, and the third outlet is directly opposite the first outlet of the adjacent first concentrate plate. The third inlet is connected to the anode water chamber 2 through the third inlet channel, and the third outlet is connected to the anode water chamber 2 through the third outlet channel. There are also two third connecting holes. Neither of the two third connecting holes is connected to the anode water chamber 2. One third connecting hole is coaxially connected to and connected to a first connecting hole of the concentrate plate and a second inlet of the desalination plate, and the other third connecting hole is coaxially connected to and connected to another first connecting hole of the concentrate plate and a second outlet of the desalination plate.

[0049] Furthermore, the electrostatic desalination chamber structure also includes a cathode partition and an anode partition, which are disposed on the side of the cathode plate 8 near the anode plate 1. The interior of the cathode partition is hollow to form a cathode water chamber 7. The cathode partition is provided with a fourth inlet, a fourth inlet channel, a fourth outlet, a fourth outlet channel, and a fourth connecting hole. The fourth inlet is positioned directly opposite the first inlet of the concentrate plate and is connected to the cathode water chamber 7 through the fourth inlet channel. The fourth outlet is positioned directly opposite the first outlet of the concentrate plate. There are also two fourth connecting holes. Neither of the two fourth connecting holes is connected to the cathode water chamber 7. One of the fourth connecting holes is coaxially arranged with the second outlet of all the freshwater plates, and the other fourth connecting hole is coaxially arranged with the second inlet of all the freshwater plates.

[0050] Furthermore, the electro-desalination chamber structure also includes a freshwater inlet pipe 9 and a concentrated water inlet pipe 10. The anode plate 1 is provided with a freshwater inlet and a concentrated water inlet. Optionally, the freshwater inlet is located near the top of the anode plate 1, and the concentrated water inlet is located near the bottom of the anode plate 1. The concentrated water inlet and the third water inlet of the anode plate 1 are directly opposite each other, and the freshwater inlet and the third connecting hole of the anode plate 1 are directly opposite each other. The freshwater inlet pipe 9 is connected to the freshwater inlet, and the concentrated water inlet pipe 10 is connected to the concentrated water inlet.

[0051] The electrostatic desalination chamber structure also includes a freshwater outlet pipe 11 and a concentrated water outlet pipe 12. The cathode plate 8 is provided with a freshwater outlet and a concentrated water outlet. The freshwater outlet is positioned directly opposite the fourth connecting hole of the cathode plate 8, and the concentrated water outlet is positioned directly opposite the fourth outlet of the cathode plate 8. The freshwater outlet pipe 11 is connected to the freshwater outlet, and the concentrated water outlet pipe 12 is connected to the concentrated water outlet. Along the first direction, the freshwater inlet pipe 9, the freshwater inlet, the third connecting hole, the first connecting hole of each concentrated water plate, the second inlet of each freshwater plate, and the fourth connecting hole are connected one by one, so that freshwater can only flow into each freshwater chamber 5, and all the freshwater in the freshwater chamber 5 eventually flows out through the freshwater outlet pipe 11. Along the first direction, the concentrated water inlet pipe 10, the concentrated water inlet, the third inlet, the first inlet of each concentrated water plate, the second connecting hole of each freshwater plate, and the fourth inlet are connected one by one, so that concentrated water can flow into the anode water chamber 2, each concentrated water chamber 3, and the cathode water chamber 7, but will not flow into the freshwater chamber 5. As can be seen, the electro-desalination chamber structure provided in this application adopts a two-inlet and two-outlet water inlet and outlet system, which eliminates the need for independent pipelines for the anode water chamber 2 and cathode water chamber 7 at both ends, thus simplifying the structure and pipeline layout of the electro-desalination chamber structure.

[0052] Furthermore, in this embodiment, the thickness of the anode water chamber 2 is the same as the thickness of the concentrate chamber 3, and the amount of ion exchange resin 13 filled in the anode water chamber 2 is the same as the amount of ion exchange resin 13 filled in the concentrate chamber 3, so that the flux between the anode water chamber 2 and the concentrate chamber 3, as well as between each concentrate chamber 3, remains consistent.

[0053] Preferably, the thickness of the freshwater chamber 5 is greater than the thickness of the concentrate chamber 3, and the flux of the freshwater chamber 5 is greater than the flux of the concentrate chamber 3.

[0054] In summary, the electro-desalination chamber structure provided in this application sets a concentrate chamber 3 between the anode water chamber 2 and the desalination chamber 5. The concentrate chamber 3 separates the anode water chamber 2 from the adjacent desalination chamber 5, thereby effectively preventing the oxidation of the desalination chamber 5 caused by the increase of the oxidation state of the reducing ions in the anode water chamber 2 after the anode plate 1 generates an oxidation-reduction potential. This reduces the risk of damage to the anode membrane 6, extends the service life of the membrane, and ensures high-quality water production and long-term stable operation of the equipment.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electro-desalination chamber structure, characterized in that, include: An anode plate, wherein an anode water chamber is formed on one side of the anode plate; A cathode plate, wherein the cathode plate and the anode plate are spaced apart; A concentrate chamber, wherein the number of the concentrate chambers is at least one; The freshwater chamber is at least one in number, and each of the concentrated water chambers and each of the freshwater chambers are alternately arranged between the anode plate and the cathode plate along a first direction; The anode water chamber is disposed between the anode plate and the concentrate chamber, and the concentrate chamber separates the anode water chamber from the first freshwater chamber.

2. The electro-desalination chamber structure according to claim 1, characterized in that, The electro-desalination chamber structure also includes a cathode water chamber, which is located on the side of the cathode plate facing the anode plate, at the end of all the concentrate chambers and all the desalination chambers.

3. The electro-desalination chamber structure according to claim 2, characterized in that, The electro-desalination chamber structure includes multiple concentrate plates, each concentrate plate being equipped with a concentrate chamber and a cathode membrane. The concentrate plate is provided with a first inlet and a first outlet, which are respectively connected to the concentrate chamber.

4. The electro-desalination chamber structure according to claim 3, characterized in that, The electro-desalination chamber structure also includes multiple freshwater plates, each freshwater plate being equipped with a freshwater chamber and an anode membrane. The freshwater plate is provided with a second inlet and a second outlet, which are respectively connected to the freshwater chamber.

5. The electro-desalination chamber structure according to claim 4, characterized in that, The height of the first inlet is lower than the height of the first outlet; The height of the second inlet is higher than the height of the second outlet.

6. The electro-desalination chamber structure according to claim 4, characterized in that, The electro-desalination chamber structure also includes: An anode partition, wherein the anode partition is provided with the anode water chamber, and another cathode membrane is provided on the anode partition; The anode partition is provided with a third water inlet and a third water outlet, which are respectively connected to the anode water chamber; The third water inlet is connected to the first water inlet, and the third water outlet is connected to the first water outlet.

7. The electro-desalination chamber structure according to claim 6, characterized in that, The electro-desalination chamber structure also includes a cathode partition, and the cathode partition is provided with the cathode water chamber; The cathode partition is provided with a fourth water inlet and a fourth water outlet, which are respectively connected to the cathode water chamber; the fourth water inlet is connected to the first water inlet, and the fourth water outlet is connected to the first water outlet.

8. The electro-desalination chamber structure according to claim 7, characterized in that, The electro-desalination chamber structure also includes: The anode plate is provided with a fresh water inlet and a concentrated water inlet. The fresh water inlet is connected to the second water inlet. The concentrated water inlet is connected to the third water inlet and the first water inlet. The cathode plate is provided with a fresh water outlet and a concentrated water outlet. The fresh water outlet is connected to the second water outlet. The concentrated water outlet is connected to the fourth water outlet and the first water outlet.

9. The electro-desalination chamber structure according to claim 2, characterized in that, The desalination chamber, the concentrate chamber, the anolyte chamber, and the cathode chamber are each filled with ion exchange resin.

10. The electro-desalination chamber structure according to any one of claims 1 to 9, characterized in that, The flux of the anolyte chamber is the same as that of the concentrate chamber.

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