Dialysis system for resin desorption liquid

Abstract

The utility model provides a dialysis system for resin desorption liquid. The dialysis system comprises a diffusion dialysis device and a single-membrane electrodialysis device. The diffusion dialysis device comprises a plurality of first anion exchange membranes, the plurality of anion exchange membranes are arranged at intervals along a first direction so as to define a plurality of diffusion liquid chambers and a plurality of dialysis liquid chambers, and the diffusion liquid chambers and the dialysis liquid chambers are arranged in a staggered manner along the first direction; the single-membrane electrodialysis device comprises a second anion-exchange membrane, a cathode plate and an anode plate, the second anion-exchange membrane is arranged between the cathode plate and the anode plate, so that a cathode chamber is defined between the second anion-exchange membrane and the cathode plate, and an anode chamber is defined between the second anion-exchange membrane and the anode plate; and each dialysate chamber is communicated with the cathode chamber. The dialysis system for the resin desorption liquid can realize the recovery of the resin desorption liquid.

Description

Technical Field

[0001] The utility model relates to the technical field of resin desorption liquid dialysis, in particular to a resin desorption liquid dialysis system. Background Art

[0002] In the process of recycling lithium iron phosphate batteries, specific selective cation exchange resins are needed to separate impurity metal ions. After the resin is saturated with adsorption, inorganic acids such as hydrochloric acid and sulfuric acid are usually needed to regenerate the resin. In this process, a resin desorption liquid with serious environmental pollution tendency but great recycling value will be produced. The resin desorption liquid is rich in a certain concentration of H+, oxygen-containing acid radical ions and heavy metal ions. Therefore, the resin desorption liquid is usually recycled by diffusion dialysis. However, the residual liquid after treatment by diffusion dialysis usually still contains a high content of salt, which still cannot meet the direct discharge standard. Utility Model Content

[0003] In view of this, the purpose of the utility model is to overcome the deficiencies in the prior art and provide a dialysis system for resin desorption liquid, which can realize the recovery of the resin desorption liquid.

[0004] The utility model provides the following technical solutions:

[0005] According to the dialysis system of resin desorption liquid of the embodiment of the utility model, it includes: a diffusion dialysis device, which includes a plurality of first anion exchange membranes, and the plurality of anion exchange membranes are arranged at intervals along a first direction to define a plurality of diffusion liquid chambers and a plurality of dialyzate chambers, and the diffusion liquid chambers and the dialyzate chambers are staggered along the first direction; a single membrane electrodialysis device, which includes a second anion exchange membrane, a cathode plate and an anode plate, and the second anion exchange membrane is arranged between the cathode plate and the anode plate to define a cathode chamber between the second anion exchange membrane and the cathode plate, and an anode chamber between the second anion exchange membrane and the anode plate, and each of the dialyzate chambers is connected to the cathode chamber.

[0006] According to the dialysis system of resin desorption liquid in the embodiment of the utility model, the diffusion dialysis device further comprises a first fixing component, and each of the first anion exchange membranes is fixedly connected to the first fixing component.

[0007] According to the dialysis system of the resin desorption liquid of the embodiment of the utility model, the first fixing assembly includes a plurality of first fixing members, two first fixing members are arranged between any two adjacent first anion exchange membranes, and each first fixing member is against two adjacent first anion exchange membranes, and between any two adjacent first anion exchange membranes, two first fixing members are respectively arranged at both ends of the first anion exchange membrane along the second direction;

[0008] The second direction is perpendicular to the first direction.

[0009] According to the dialysis system of resin desorption liquid of the embodiment of the utility model, the first fixing assembly also includes two second fixings, the two second fixings are arranged at intervals along the first direction, and any one of the first anion exchange membranes is arranged between the two second fixings, two first fixings are arranged between each second fixing and the first anion exchange membrane closest to the second fixing, and each second fixing is against the first fixing.

[0010] According to the dialysis system of resin desorption liquid of the embodiment of the utility model, the first fixing component also includes a first fastener, the first fastener is extended along the first direction, and one end of the first fastener along the first direction is fixedly connected to one of the second fixing members, and the other end of the first fastener along the first direction is fixedly connected to another second fixing member.

[0011] According to the dialysis system of the resin desorption liquid of the embodiment of the utility model, the resin desorption liquid undergoes at least two diffusion dialysis actions in the diffusion dialysis device.

[0012] According to the dialysis system for resin desorption liquid of the embodiment of the utility model, the single membrane electrodialysis device further comprises a second fixing component, and the second anion exchange membrane is fixedly connected to the second fixing component.

[0013] According to the dialysis system of resin desorption liquid of the embodiment of the utility model, the second fixing component includes a third fixing member and a fourth fixing member, the third fixing member is arranged between the second anion exchange membrane and the cathode plate, and the two ends of the third fixing member are respectively fixedly connected to the second anion exchange membrane and the cathode plate, the fourth fixing member is arranged between the second anion exchange membrane and the anode plate, and the two ends of the fourth fixing member are respectively fixedly connected to the second anion exchange membrane and the anode plate.

[0014] According to the dialysis system of resin desorption liquid of the embodiment of the utility model, the second fixing assembly also includes two fifth fixings, the two fifth fixings are arranged at intervals, the anode plate, the second anion exchange membrane and the cathode plate are all arranged between the two fifth fixings, and one of the fifth fixings is against the side of the anode plate away from the second anion exchange membrane, and the other fifth fixing is against the side of the cathode plate away from the second anion exchange membrane.

[0015] According to the dialysis system of resin desorption liquid of the embodiment of the utility model, the single membrane electrodialysis device also includes a seal, which is arranged around the second anion exchange membrane, and the side of the second anion exchange membrane close to the cathode plate and the side of the second anion exchange membrane close to the anode plate are both against the seal.

[0016] The embodiments of the present utility model have the following advantages:

[0017] In the above-mentioned dialysis system of the resin desorbent, when the resin desorbent needs to be recycled, the resin desorbent is first subjected to at least two diffusion dialysis actions in the diffusion dialysis device, and then subjected to electrodialysis in the single membrane electrodialysis device, so as to realize the recycling of the resin desorbent. When the resin desorbent is subjected to diffusion dialysis in the diffusion dialysis device, most of the acid in the resin desorbent can be recovered by diffusion dialysis. In this process, pure water is injected into the diffusion liquid chamber, and the resin desorbent is injected into the dialysate chamber. Due to the characteristics of the first anion exchange membrane and the diffusion dialysis, the high concentration SO in the dialysate chamber can be recovered. 4 2- The first anion exchange membrane enters the diffusion liquid chamber to separate and recover most of the acid in the resin desorption liquid. However, there are still high salt and a small amount of acid in the treated residual liquid, so it cannot be discharged directly. At this time, the separated recovered acid is injected into the anode chamber of the single membrane electrodialysis device, and the residual liquid of the resin desorption liquid is injected into the cathode chamber of the single membrane electrodialysis device. Under the action of the DC electric field and the selective permeability of the second anion exchange membrane, the Fe 2+ , Fe 3+ ,CCu 2+ The metal ions will form metal precipitation on the cathode plate, and some OH in the anode chamber - It will pass through the second anion exchange membrane into the cathode chamber and react with OH in the cathode chamber. - Combined with water molecules, the salt content in the residual liquid in the cathode chamber can be reduced. Furthermore, the SO 4 2-It will migrate to the anode through the second anion exchange membrane. After filtering the treated liquid in the cathode chamber, the acid content in the residual liquid in the cathode chamber can be reduced, so as to obtain a treated filtrate with extremely low salt and acid contents. In this way, the treated liquid of the resin desorption liquid can meet the requirements of direct discharge. At the same time, the metals filtered out in the cathode chamber can also be recovered and reused.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the process flow of a dialysis system for resin desorption liquid according to an embodiment of the utility model is shown;

[0021] Figure 2 A schematic structural diagram of a diffusion dialysis device according to an embodiment of the utility model is shown;

[0022] Figure 3 A schematic diagram showing the diffusion dialysis principle of an embodiment of the utility model is shown;

[0023] Figure 4 A schematic diagram of the top view of the single membrane electrodialysis device according to an embodiment of the utility model is shown;

[0024] Figure 5 A schematic cross-sectional view of a single membrane electrodialysis device according to an embodiment of the utility model is shown;

[0025] Figure 6 A schematic diagram of the single membrane electrodialysis principle of an embodiment of the utility model is shown.

[0026] Description of main component symbols:

[0027] 100-diffusion dialysis device; 110-first anion exchange membrane; 120-diffusion liquid chamber; 121-first liquid inlet; 122-first liquid outlet; 130-dialysis liquid chamber; 131-second liquid inlet; 132-second liquid outlet; 140-first fixing assembly; 141-first fixing member; 142-second fixing member; 143-first fastener;

[0028] 200 - single membrane electrodialysis device; 210 - second anion exchange membrane; 220 - cathode plate; 230 - anode plate; 240 - cathode chamber; 250 - anode chamber; 260 - second fixing assembly; 261 - third fixing member; 262 - fourth fixing member; 263 - fifth fixing member; 264 - second fastener; 270 - sealing member. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the template herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] Reference Figure 1 , Figure 2 as well as Figure 4 As shown, the dialysis system of the resin desorption liquid involved in the embodiment of the utility model includes: a diffusion dialysis device 100 and a single membrane electrodialysis device 200.

[0035] Specifically, the diffusion dialysis device 100 includes a plurality of first anion exchange membranes 110, and the plurality of anion exchange membranes are spaced apart along a first direction to define a plurality of diffusion liquid chambers 120 and a plurality of dialyzate chambers 130, and the diffusion liquid chambers 120 and the dialyzate chambers 130 are staggered along the first direction; the single membrane electrodialysis device 200 includes a second anion exchange membrane 210, a cathode plate 220 and an anode plate 230, and the second anion exchange membrane 210 is arranged between the cathode plate 220 and the anode plate 230 to define a cathode chamber 240 between the second anion exchange membrane 210 and the cathode plate 220, and an anode chamber 250 is defined between the second anion exchange membrane 210 and the anode plate 230, and each dialyzate chamber 130 is connected to the cathode chamber 240.

[0036] It should be noted that diffusion dialysis refers to the use of an ion exchange membrane to separate a feed liquid and a receiving liquid of different concentrations, so that the solute diffuses from the side with high concentration through the membrane to the side with low concentration. When the concentrations on both sides of the membrane reach equilibrium, the dialysis process stops, and the concentration difference is the driving force of dialysis. In the above-mentioned embodiment, the feed liquid is the resin desorption liquid, and the receiving liquid is pure water and the filtrate after the electrodialysis.

[0037] Furthermore, anion exchange membranes can be used to recover acid from salt solutions when diffusion dialysis is performed under acidic conditions.

[0038] It should be noted that the first direction is Figure 2 The direction that x points to.

[0039] In the above-mentioned dialysis system of the resin desorbent, when the resin desorbent needs to be recycled, the resin desorbent is first subjected to at least two diffusion dialysis actions in the diffusion dialysis device 100, and then subjected to electrodialysis in the single membrane electrodialysis device 200, so as to realize the recycling of the resin desorbent. When the resin desorbent is subjected to diffusion dialysis in the diffusion dialysis device 100, most of the acid in the resin desorbent can be recovered by diffusion dialysis. In this process, pure water is injected into the diffusion liquid chamber 120, and the resin desorbent is injected into the dialyzate chamber 130. Due to the characteristics of the first anion exchange membrane 110 and the diffusion dialysis, the high concentration SO in the dialyzate chamber 130 can be recovered. 4 2-The first anion exchange membrane 110 enters the diffusion liquid chamber 120 to separate and recover most of the acid in the resin desorption liquid. However, the residual liquid after treatment still contains a high content of salt and a small amount of acid, so it cannot be discharged directly. At this time, the separated recovered acid is injected into the anode chamber 250 of the single membrane electrodialysis device 200, and the residual liquid of the resin desorption liquid is injected into the cathode chamber 240 of the single membrane electrodialysis device 200. Under the action of the DC electric field and the selective permeability of the second anion exchange membrane 210, the Fe-containing acid in the cathode chamber 240 is discharged. 2+ , Fe 3+ , C Cu 2+ The metal ions will form metal precipitation on the cathode plate 220, and some OH in the anode chamber 250 - The ions will pass through the second anion exchange membrane 210 and enter the cathode chamber 240, and react with the OH in the cathode chamber 240. - Combined to form water molecules, this can reduce the salt content in the residual liquid in the cathode chamber 240. Further, the SO 4 2- It will migrate to the anode through the second anion exchange membrane 210. After filtering the treated liquid in the cathode chamber 240, the acid content in the residual liquid in the cathode chamber 240 can be reduced, so as to obtain a treated filtrate with extremely low salt and acid contents. In this way, the treated liquid of the resin desorption liquid can meet the requirements of direct discharge. At the same time, the metals filtered out in the cathode chamber 240 can also be recovered and reused.

[0040] Specifically, in the above-mentioned embodiment, the filtrate obtained after treatment by the single membrane electrodialysis device 200 can be mixed with pure water, and can be injected into the diffusion chamber of the diffusion dialysis device 100 in the next diffusion dialysis action and used as a receiving liquid. In this way, the amount of pure water used can be reduced, the consumption of pure water can be reduced, and the economy can be improved.

[0041] Reference Figure 2 As shown, the diffusion dialysis device 100 further includes a first fixing component 140 , and each first anion exchange membrane 110 is fixedly connected to the first fixing component 140 .

[0042] It can be understood that since each first anion exchange membrane 110 is fixedly connected to the first fixing component 140, each first anion exchange membrane 110 can be fixed by the first fixing component 140 to ensure that any two adjacent first anion exchange membranes 110 can be spaced apart, ensuring the spatial stability of the diffusion liquid chamber 120 and the dialyzate chamber 130, thereby ensuring that the resin desorption liquid can perform diffusion dialysis in the diffusion dialysis device 100.

[0043] Continue to refer to Figure 2As shown, the first fixing component 140 includes a plurality of first fixing members 141, two first fixing members 141 are arranged between any two adjacent first anion exchange membranes 110, and each first fixing member 141 is abutted against two adjacent first anion exchange membranes 110, and between any two adjacent first anion exchange membranes 110, two first fixing members 141 are respectively arranged at both ends of the first anion exchange membrane 110 along the second direction; wherein the second direction is perpendicular to the first direction.

[0044] It should be noted that the second direction is Figure 2 The direction that y points to.

[0045] It can be understood that, since two first fixing members 141 are arranged between any two adjacent first anion exchange membranes 110, and each first fixing member 141 is against two adjacent first anion exchange membranes 110, each first fixing member 141 can ensure that any two adjacent first anion exchange membranes 110 can be arranged at intervals, and the stability of the relative position relationship of each first anion exchange membrane 110 can be ensured. At the same time, between any two adjacent first anion exchange membranes 110, since the two first fixing members 141 are respectively arranged at the two ends of the first anion exchange membrane 110 along the second direction, it is possible to avoid the first fixing member 141 from interfering with the first anion exchange membrane 110, so as to ensure that the first anion exchange membrane 110 has sufficient area for anions to pass through, so as to realize the diffusion dialysis effect on the resin desorption liquid.

[0046] Continue to refer to Figure 2 As shown, the first fixing assembly 140 also includes two second fixing members 142, the two second fixing members 142 are arranged at intervals along the first direction, and any first anion exchange membrane 110 is arranged between the two second fixing members 142, and two first fixing members 141 are arranged between each second fixing member 142 and the first anion exchange membrane 110 closest to the second fixing member 142.

[0047] It can be understood that, since any first anion exchange membrane 110 is arranged between two second fixings 142, each first anion exchange membrane 110 and each first fixing 141 can be fixed between the two second fixings 142 by two first fixings 141, so as to ensure the connection stability of any first anion exchange membrane 110 and the first fixing 141. At the same time, since two first fixings 141 are arranged between each second fixing 142 and the first anion exchange membrane 110 closest to the second fixing 142, the second fixing 142 and the first anion exchange membrane 110 closest to the second fixing 142 can be spaced apart by the first fixing 141, so as to define a diffusion liquid chamber 120 or a dialyzate liquid chamber 130 between the second fixing 142 and the first anion exchange membrane 110 closest to the second fixing 142, thereby avoiding interference of the second fixing 142 with the first anion exchange membrane 110.

[0048] Continue to refer to Figure 2 As shown, the first fixing assembly 140 also includes a first fastener 143, which is extended along the first direction, and one end of the first fastener 143 along the first direction is fixedly connected to one of the second fixing members 142, and the other end of the first fastener 143 along the first direction is fixedly connected to another second fixing member 142.

[0049] Specifically, in the above-mentioned embodiment, there are two first fasteners 143, the two first fasteners 143 are arranged at intervals along the second direction, and any first anion exchange membrane 110 is arranged between the two first fasteners 143, one end of each first fastener 143 along the first direction is fixedly connected to one of the second fixing members 142, and the other end of each first fastener 143 along the first direction is fixedly connected to the other second fixing member 142.

[0050] It can be understood that since one end of the first fastener 143 along the first direction is fixedly connected to one of the second fixing members 142, and the other end of the first fastener 143 along the first direction is fixedly connected to the other second fixing member 142, the two second fixing members 142 can be fixed by the first fastener 143 so that the two second fixing members 142 have a tendency to move toward each other, so that each second fixing member 142 can be offset against the first fixing member 141 in contact with it, thereby fixing the relative position relationship between the multiple first anion exchange membranes 110 through the two second fixing members 142.

[0051] Specifically, refer to Figure 1 as well as Figure 3 As shown, in the above embodiment, the resin desorption liquid undergoes at least two diffusion dialysis actions in the diffusion dialysis device 100 .

[0052] More specifically, in the above-mentioned embodiment, the resin desorption liquid is subjected to two diffusion dialysis actions in the diffusion dialysis device 100 .

[0053] It can be understood that when the resin desorption liquid performs the first diffusion dialysis in the diffusion dialysis device 100, pure water and the filtrate after the electrodialysis are injected into the diffusion liquid chamber 120, and the resin desorption liquid is injected into the dialysis liquid chamber 130. Due to the characteristics of the first anion exchange membrane 110 and the diffusion dialysis, the high concentration SO in the dialysis liquid chamber 130 can be reduced. 4 2- Entering into the diffusion liquid chamber 120 through the first anion exchange membrane 110, the acid in the resin desorption liquid is initially separated and recovered. After the first diffusion dialysis is completed, the primary recovered acid can be obtained in the diffusion liquid chamber 120, and the primary residual liquid can be obtained in the dialyzate chamber 130. Subsequently, the primary residual liquid is injected into the dialyzate chamber 130, and the dialysis is performed again to improve the recovery rate of the acid in the resin desorption liquid, and the secondary recovered acid and the secondary residual liquid are obtained. Further, the secondary residual liquid is injected into the cathode chamber 240 in the single membrane electrodialysis device 200, and the secondary recovered acid is injected into the anode chamber 250 in the single membrane electrodialysis device 200, so as to perform electrodialysis on the secondary residual liquid in the single membrane electrodialysis device 200, thereby realizing the treatment of the residual liquid after the diffusion dialysis, so that the treated residual liquid meets the discharge standard.

[0054] Specifically, refer to Figure 3 as well as Figure 6 As shown, in the above embodiment, after the secondary recovered acid and the secondary residual liquid are electrodialyzed in the single membrane electrodialysis device 200, the tertiary recovered acid can be obtained in the anode chamber 250. Compared with the secondary recovered acid, due to the SO 4 2- It will migrate to the anode through the second anion exchange membrane 210, thereby increasing the acid content in the anode chamber 250, so that the acid concentration of the tertiary recovered acid can be increased. In this way, both the primary recovered acid and the tertiary recovered acid with higher acid concentration can be used to regenerate the resin, which not only realizes the reuse of the recovered acid in the dialysis process of the resin desorption liquid, but also facilitates the regeneration of the resin.

[0055] Specifically, refer to Figure 3As shown, in the above embodiment, each diffusion liquid chamber 120 is provided with a first liquid inlet 121 and a first liquid outlet 122, and in each diffusion liquid chamber 120, the first liquid inlet 121 is connected to the first liquid outlet 122, and each dialysis chamber is provided with a second liquid inlet 131 and a second liquid outlet 132, and in each diffusion liquid chamber 120, the second liquid inlet 131 is connected to the second liquid outlet 132; wherein, the direction from the first liquid inlet 121 to the first liquid outlet 122 is opposite to the direction from the second liquid inlet 131 to the second liquid outlet 132.

[0056] Reference Figure 4 as well as Figure 5 As shown, the single membrane electrodialysis device 200 further includes a second fixing assembly 260 , and the second anion exchange membrane 210 is fixedly connected to the second fixing assembly 260 .

[0057] It can be understood that, since the second anion exchange membrane 210 is fixedly connected to the second fixing assembly 260 , the second anion exchange membrane 210 can be fixed by the second fixing assembly 260 to ensure the structural stability of the second anion exchange membrane 210 .

[0058] Continue to refer to Figure 4 as well as Figure 5 As shown, the second fixing component 260 includes a third fixing member 261 and a fourth fixing member 262, the third fixing member 261 is arranged between the second anion exchange membrane 210 and the cathode plate 220, and the two ends of the third fixing member 261 are respectively fixedly connected to the second anion exchange membrane 210 and the cathode plate 220, and the fourth fixing member 262 is arranged between the second anion exchange membrane 210 and the anode plate 230, and the two ends of the fourth fixing member 262 are respectively fixedly connected to the second anion exchange membrane 210 and the anode plate 230.

[0059] It can be understood that, since the third fixing member 261 is arranged between the second anion exchange membrane 210 and the cathode plate 220, and the two ends of the third fixing member 261 are respectively fixedly connected to the second anion exchange membrane 210 and the cathode plate 220, the second anion exchange membrane 210 and the cathode plate 220 can be fixed by the third fixing member 261, so as to improve the stability of the relative position relationship between the second anion exchange membrane 210 and the cathode plate 220. Similarly, since the fourth fixing member 262 is arranged between the second anion exchange membrane 210 and the anode plate 230, and the two ends of the fourth fixing member 262 are respectively fixedly connected to the second anion exchange membrane 210 and the anode plate 230, the second anion exchange membrane 210 and the anode plate 230 can be fixed by the fourth fixing member 262, so as to improve the stability of the relative position relationship between the second anion exchange membrane 210 and the anode plate 230.

[0060] Continue to refer to Figure 4 as well as Figure 5 As shown, the second fixing assembly 260 also includes two fifth fixing members 263, and the two fifth fixing members 263 are arranged at intervals. The anode plate 230, the second anion exchange membrane 210 and the cathode plate 220 are all arranged between the two fifth fixing members 263, and one of the fifth fixing members 263 is against the side of the anode plate 230 away from the second anion exchange membrane 210, and the other fifth fixing member 263 is against the side of the cathode plate 220 away from the second anion exchange membrane 210.

[0061] It can be understood that since the anode plate 230, the second anion exchange membrane 210 and the cathode plate 220 are all arranged between the two fifth fixing members 263, and one of the fifth fixing members 263 is against the side of the anode plate 230 away from the second anion exchange membrane 210, and the other fifth fixing member 263 is against the side of the cathode plate 220 away from the second anion exchange membrane 210, the anode plate 230, the second anion exchange membrane 210 and the cathode plate 220 can be fixed between the two fifth fixing members 263, so as to ensure the connection stability of one of the first fixing members 141 and the second anion exchange membrane 210 and the cathode plate 220, and at the same time ensure the connection stability of the other first fixing member 141 and the second anion exchange membrane 210 and the anode plate 230.

[0062] Specifically, continue to refer to Figure 4 as well as Figure 5 As shown, in the above embodiment, the second fixing assembly 260 also includes two second fasteners 264, the cathode plate 220, the second anion exchange membrane 210 and the primary anode plate 230 are all arranged between the two second fasteners 264, one end of each second fastener 264 is fixedly connected to one of the fifth fixing members 263, and the other end of each second fastener 264 along the first direction is fixedly connected to another fifth fixing member 263.

[0063] Continue to refer to Figure 4 as well as Figure 5 As shown, the single membrane electrodialysis device 200 further includes a seal 270 , which is disposed around the second anion exchange membrane 210 , and a side of the second anion exchange membrane 210 close to the cathode plate 220 and a side of the second anion exchange membrane 210 close to the anode plate 230 are both against the seal 270 .

[0064] It can be understood that since the side of the second anion exchange membrane 210 close to the cathode plate 220 and the side of the second anion exchange membrane 210 close to the anode plate 230 are both against the seal 270, the seal 270 can ensure the sealing of the cathode chamber 240 and the anode chamber 250, and prevent the solution in the anode chamber 250 from entering the cathode chamber 240 through the gap, thereby ensuring the smooth progress of the electrodialysis.

[0065] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0066] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0067] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A dialysis system for resin desorption liquid, characterized in that: include: A diffusion dialysis device (100), the diffusion dialysis device (100) comprising a plurality of first anion exchange membranes (110), the plurality of anion exchange membranes being arranged at intervals along a first direction to define a plurality of diffusion liquid chambers (120) and a plurality of dialysate chambers (130), the diffusion liquid chambers (120) and the dialysate chambers (130) being arranged alternately along the first direction; A single membrane electrodialysis device (200) comprises a second anion exchange membrane (210), a cathode plate (220) and an anode plate (230), wherein the second anion exchange membrane (210) is arranged between the cathode plate (220) and the anode plate (230) to define a cathode chamber (240) between the second anion exchange membrane (210) and the cathode plate (220), and an anode chamber (250) is defined between the second anion exchange membrane (210) and the anode plate (230), and each of the dialysate chambers (130) is connected to the cathode chamber (240).

2. The dialysis system for resin desorption liquid according to claim 1, characterized in that: The diffusion dialysis device (100) further comprises a first fixing component (140), and each of the first anion exchange membranes (110) is fixedly connected to the first fixing component (140).

3. The dialysis system for resin desorption liquid according to claim 2, characterized in that: The first fixing assembly (140) comprises a plurality of first fixing members (141), two of the first fixing members (141) are arranged between any two adjacent first anion exchange membranes (110), and each of the first fixing members (141) abuts against two adjacent first anion exchange membranes (110), and between any two adjacent first anion exchange membranes (110), two of the first fixing members (141) are respectively arranged at two ends of the first anion exchange membrane (110) along the second direction; The second direction is perpendicular to the first direction.

4. The dialysis system for resin desorption liquid according to claim 3, characterized in that: The first fixing assembly (140) further comprises two second fixing members (142), the two second fixing members (142) being arranged at intervals along the first direction, and any one of the first anion exchange membranes (110) being arranged between the two second fixing members (142), two first fixing members (141) being arranged between each of the second fixing members (142) and the first anion exchange membrane (110) closest to the second fixing member (142), and each of the second fixing members (142) being abutted against the first fixing member (141).

5. The dialysis system for resin desorption liquid according to claim 4, characterized in that: The first fixing assembly (140) further comprises a first fastener (143), the first fastener (143) extending along the first direction, and one end of the first fastener (143) along the first direction is fixedly connected to one of the second fixing members (142), and the other end of the first fastener (143) along the first direction is fixedly connected to another of the second fixing members (142).

6. The dialysis system for resin desorption liquid according to any one of claims 1 to 5, characterized in that: The resin desorption liquid undergoes at least two diffusion dialysis actions in the diffusion dialysis device (100).

7. The dialysis system for resin desorption liquid according to any one of claims 1 to 5, characterized in that: The single membrane electrodialysis device (200) further comprises a second fixing component (260), and the second anion exchange membrane (210) is fixedly connected to the second fixing component (260).

8. The dialysis system for resin desorption liquid according to claim 7, characterized in that: The second fixing component (260) comprises a third fixing member (261) and a fourth fixing member (262); the third fixing member (261) is arranged between the second anion exchange membrane (210) and the cathode plate (220), and two ends of the third fixing member (261) are respectively fixedly connected to the second anion exchange membrane (210) and the cathode plate (220); the fourth fixing member (262) is arranged between the second anion exchange membrane (210) and the anode plate (230), and two ends of the fourth fixing member (262) are respectively fixedly connected to the second anion exchange membrane (210) and the anode plate (230).

9. The dialysis system for resin desorption liquid according to claim 7, characterized in that: The second fixing assembly (260) further comprises two fifth fixing members (263), the two fifth fixing members (263) are arranged at intervals, the anode plate (230), the second anion exchange membrane (210) and the cathode plate (220) are all arranged between the two fifth fixing members (263), and one of the fifth fixing members (263) abuts against a side of the anode plate (230) away from the second anion exchange membrane (210), and the other fifth fixing member (263) abuts against a side of the cathode plate (220) away from the second anion exchange membrane (210).

10. The dialysis system for resin desorption liquid according to claim 7, characterized in that: The single membrane electrodialysis device (200) further comprises a seal (270), wherein the seal (270) is arranged around the second anion exchange membrane (210), and a side of the second anion exchange membrane (210) close to the cathode plate (220) and a side of the second anion exchange membrane (210) close to the anode plate (230) are both in contact with the seal (270).

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