Electro-adsorption desalting device surrounding sodium ion removal
By utilizing a combination of a low-voltage DC electric field and a nanofiltration membrane in the electro-adsorption desalination device, the problems of inefficient energy consumption and scale deposition in existing technologies have been solved, achieving low-energy, high-efficiency sodium ion removal and equipment stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NORTHEAST DIANLI UNIVERSITY
- Filing Date
- 2026-02-05
- Publication Date
- 2026-05-15
AI Technical Summary
Existing electro-adsorption desalination technology is energy-inefficient and has a low desalination rate when treating water with low salinity, and the scale deposits on the cathode surface affect the equipment's lifespan and stability.
An electro-adsorption desalination device focusing on sodium ion removal is used. A low-voltage DC electric field causes sodium ions to migrate to the cathode and be adsorbed by activated carbon fiber cloth, forming an ion depletion layer. Nanofiltration membranes are used to limit scale-forming ions, and reverse polarity regeneration technology is combined to reduce energy consumption and extend equipment life.
It achieves low-energy, high-efficiency sodium ion removal, extends the service life of the equipment, and ensures operational stability.
Smart Images
Figure CN122036020A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electro-adsorption desalination technology, specifically to an electro-adsorption desalination device for sodium ion removal. Background Technology
[0002] Freshwater scarcity has become an unavoidable problem hindering industrial production and people's lives. Currently, the desalination technologies used at home and abroad are mainly ion exchange desalination technology, multi-effect flash evaporation and distillation technology, reverse osmosis technology and electrodialysis technology. Existing desalination technologies are applied in the fields of seawater desalination, reclaimed water reuse and deep desalination of water. However, they have drawbacks such as high energy consumption, low efficiency and secondary pollution. Therefore, developing an environmentally friendly, energy-saving and efficient desalination technology has become an urgent problem to be solved in the field of desalination technology.
[0003] Electroadsorption desalination devices are a new type of water treatment equipment based on electroadsorption technology. With an electrode module as the core, an electrostatic field is formed by applying an external voltage. The double electric layer effect on the electrode surface adsorbs salt ions and charged particles in the water to achieve desalination. It has the characteristics of anti-pollution, anti-scaling and non-clogging. Compared with traditional desalination technology, it does not require the addition of chemical agents.
[0004] Existing electro-adsorption desalination devices have become a research hotspot in the desalination field both domestically and internationally due to their advantages of low cost, energy saving, and environmental friendliness. However, although existing electro-adsorption desalination technology is more energy-efficient than reverse osmosis and distillation processes, it still requires electrical energy to drive the migration of all anions and cations in the water. It does not distinguish the migration characteristics of ions, resulting in ineffective energy consumption. Furthermore, existing electro-adsorption technology is more suitable for water bodies with medium to high salinity. When treating raw water with low salinity, due to the low ion concentration and weak inter-ion interactions, the desalination rate will decrease and the quality of the produced water will be unstable, making it difficult to meet the needs of deep desalination. At the same time, the concentrate zone of existing electro-adsorption technology has a large concentration of anions and cations, while calcium and magnesium ions will deposit on the cathode surface to form scale, leading to a decrease in electrode adsorption capacity and affecting the lifespan and operational stability of the equipment. Summary of the Invention
[0005] To address the shortcomings of existing technologies, this invention provides an electro-adsorption desalination device for sodium ion removal, which solves the problems of ineffective energy consumption, difficulty in meeting deep desalination requirements, and the deposition of scale on the cathode surface by ions in the concentrated water zone in existing electro-adsorption desalination technologies.
[0006] To achieve the above objectives, the present invention provides the following technical solution: an electro-adsorption desalination device for sodium ion removal, comprising an electro-adsorption box, two end plates fixedly connected to the outside of the electro-adsorption box, a desalination mechanism disposed inside the electro-adsorption box, a fresh water tank disposed outside the electro-adsorption box, a concentrated water tank disposed outside the electro-adsorption box, a connecting mechanism disposed inside both the fresh water tank and the concentrated water tank, a saline water tank disposed outside the electro-adsorption box, a raw water pump disposed outside the electro-adsorption box, and a cleaning mechanism disposed outside the electro-adsorption box; The desalination mechanism includes two graphite manifolds, both of which are fixedly connected inside the electro-adsorption box. Activated carbon fiber cloth is fixedly connected inside the electro-adsorption box. A first insulating guide net is fixedly connected inside the electro-adsorption box. A nanofiltration membrane is fixedly connected inside the electro-adsorption box. A second insulating guide net is fixedly connected inside the electro-adsorption box. A freshwater pipe and a concentrated water pipe are connected to the outside of the electro-adsorption box.
[0007] Preferably, the desalination mechanism further includes a DC regulated power supply, which is disposed outside the electro-adsorption box. An electrode converter is disposed outside the DC regulated power supply, a time relay is disposed outside the DC regulated power supply, and a water outlet controller is disposed outside the electro-adsorption box. Both the electro-adsorption box and the water outlet controller are connected to a water outlet pipe.
[0008] Preferably, the connecting mechanism includes a fixed plate, which is fixedly connected inside the freshwater tank and the concentrated water tank. Both the freshwater tank and the concentrated water tank have mounting slots inside. A drive gear is fixedly connected to the outer side of the fixed plate, and an adjustment knob is fixedly connected to the outer side of the drive gear. A driven ring is fixedly connected to the outer side of the fixed plate, and multiple toothed blocks are fixedly connected to the outer side of the driven ring. Multiple limiting shafts are fixedly connected to the outer side of the fixed plate, and limiting blocks are rotatably connected to the outer sides of the multiple limiting shafts. Multiple connecting rods are rotatably connected to the outer side of the driven ring, and fixing slots are provided on the outer sides of the multiple water outlet pipes.
[0009] Preferably, the cleaning mechanism includes a shrink tube fixedly connected to the outside of the saline tank, a filter box fixedly connected to the outside of the shrink tube, a filter screen fixedly connected inside the filter box, a moving groove inside the filter box, a pull rod slidably connected inside the moving groove, multiple return springs fixedly connected inside the moving groove, a guide groove on the outside of the pull rod, a rotating shaft slidably connected inside the pull rod, a guide key fixedly connected to the outside of the rotating shaft, the guide key slidably connected to the inside of the guide groove, and a cleaning brush fixedly connected to the outside of the pull rod.
[0010] Preferably, the first insulating guide net is connected to the fresh water pipe, and the second insulating guide net is connected to the concentrated water pipe.
[0011] Preferably, the positive and negative terminals of the DC regulated power supply are connected to the graphite current collector via the electrode converter, and the time relay is signal-connected to the electrode converter.
[0012] Preferably, the outer side of the fixed disk is fixedly connected to multiple fixed shafts, and the outer side of the driven ring is provided with multiple guide grooves, and the fixed shafts are slidably connected to the inner side of the guide grooves.
[0013] Preferably, a limiting frame is fixedly connected inside the filter box, and a limiting groove is formed on the outer side of the rotating shaft, with the limiting frame rotatably connected to the inner side of the limiting groove.
[0014] Preferably, a limiting disk is fixedly connected to the outer side of the rotating shaft, and a second limiting groove is formed inside the filter box, with the limiting disk rotatably connected to the inner side of the second limiting groove.
[0015] Preferably, the filter box has a storage slot inside, and a storage box is slidably connected inside the storage slot.
[0016] This invention provides an electroadsorption desalination device for sodium ion removal. It has the following beneficial effects: 1. This invention uses a low-voltage DC electric field to cause sodium ions to migrate towards the cathode and be adsorbed by activated carbon fiber cloth, while anions migrate in the opposite direction at a higher speed, thereby forming an ion depletion layer between the adsorption layer and the nanofiltration membrane, achieving the production of fresh water. The concentrated anions form concentrated water which is discharged. After adsorption saturation, the electrode polarity is automatically switched for regeneration, so that the desorbed sodium ions are discharged with the flushing water, thereby significantly reducing energy consumption, ensuring the long-term stable operation of the device, reducing energy consumption, and extending the service life of the device.
[0017] 2. This invention drives the active gear and multiple gear blocks to mesh and transmit power by rotating the adjustment knob, which in turn drives the driven ring to rotate smoothly. The connecting rod pushes multiple limit blocks to converge towards the center synchronously, so that the limit blocks are tightly closed at the fixing groove on the outside of the water outlet pipe, forming a complete clamping ring. This quickly and firmly fixes the water outlet pipe, simplifies the operation process of pipe connection, and improves the efficiency of installation and disassembly and the stability of connection.
[0018] 3. This invention uses a filter screen to intercept large particles of impurities and utilizes a Venturi channel to accelerate water flow, ensuring that the cleaning brush remains in constant contact with the filter screen. When cleaning is needed, pressing down on the pull rod activates a reverse rotation mechanism, causing the pull rod to rotate and drive the cleaning brush to clean the filter screen surface, allowing impurities to fall into the collection tank. After releasing the pull rod, a return spring automatically resets the rod, simplifying the maintenance of the filtration unit and ensuring the stability and efficiency of the subsequent desalination process. Attached Figure Description
[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a cross-sectional view of the electroadsorption box of the present invention; Figure 4 This is a cross-sectional view of the end plate of the present invention; Figure 5 This is a cross-sectional view of the filter box of the present invention; Figure 6 This is a cross-sectional view of the pull rod of the present invention; Figure 7 This is a cross-sectional view of the concentrate tank of the present invention; Figure 8 This is a schematic diagram of the structure of the driving gear of the present invention; Figure 9 This is a schematic diagram of the connecting rod of the present invention.
[0020] Among them, 1. Electroadsorption box; 2. End plate; 3. Desalination mechanism; 31. Graphite collector plate; 32. Activated carbon fiber cloth; 33. First insulating guide net; 34. Nanofiltration membrane; 35. Second insulating guide net; 36. Fresh water pipe; 37. Concentrate pipe; 38. DC regulated power supply; 39. Electrode converter; 310. Time relay; 4. Connecting mechanism; 41. Installation slot; 42. Fixing plate; 43. Drive gear; 44. Adjustment knob; 45. Driven ring; 46. Gear block; 47. Limiting shaft; 48. Connecting rod; 49. Limiting block; 410. Fixed... 411. Fixed groove; 412. Guide groove two; 5. Cleaning mechanism; 51. Shrink tube; 52. Filter box; 53. Filter screen; 54. Moving groove; 55. Pull rod; 56. Return spring; 57. Guide groove one; 58. Rotating shaft; 59. Guide key; 510. Cleaning brush; 511. Limiting frame; 512. Limiting groove one; 513. Limiting plate; 514. Limiting groove two; 515. Storage groove; 516. Storage box; 6. Saltwater tank; 7. Raw water pump; 8. Water outlet controller; 9. Water outlet pipe; 10. Fresh water tank; 11. Concentrated water tank. Detailed Implementation
[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] Please see the appendix Figure 1 - Appendix Figure 4 This invention provides an electro-adsorption desalination device for sodium ion removal, comprising an electro-adsorption box 1, with two end plates 2 fixedly connected to the outside of the electro-adsorption box 1, forming a protective shell. A desalination mechanism 3 is installed inside the electro-adsorption box 1 to accelerate the electro-adsorption desalination process. A freshwater tank 10 is installed outside the electro-adsorption box 1 to store desalinated freshwater. A concentrated water tank 11 is also installed outside the electro-adsorption box 1 to store concentrated water with high impurity content. Both the freshwater tank 10 and the concentrated water tank 11 are equipped with... The connecting mechanism 4 is used to speed up the connection between the outlet pipe 9 and the fresh water tank 10 and the concentrated water tank 11, and to ensure the stability of the pipeline connection. A saline tank 6 is provided on the outside of the electro-adsorption box 1. The saline tank 6 serves as a container for storing saline solution and increases the stability of subsequent saline solution transportation. A raw water pump 7 is provided on the outside of the electro-adsorption box 1. The raw water pump 7 is used to speed up the flow of saline solution. A cleaning mechanism 5 is provided on the outside of the electro-adsorption box 1. The cleaning mechanism 5 is used to filter out large particulate impurities in the saline solution before electro-adsorption desalination to avoid damage to the desalination equipment. The desalination mechanism 3 includes two graphite current collectors 31, which serve as the two positive and negative electrodes. The graphite current collector 31 in contact with the activated carbon fiber cloth 32 is the cathode. Both graphite current collectors 31 are fixedly connected inside the electro-adsorption box 1. The activated carbon fiber cloth 32 is fixedly connected inside the electro-adsorption box 1. The activated carbon fiber cloth 32 can efficiently adsorb and temporarily store migrating sodium ions, achieving water-electricity separation. A first insulating guide net 33 with a thickness of 0.1-0.3 mm is fixedly connected inside the electro-adsorption box 1 to maintain the freshwater channel gap and collect water from the ion depletion layer to the freshwater outlet. A nanofiltration membrane 34 with a pore size of 0.1-0.4 nm is fixedly connected inside the electro-adsorption box 1. During the electro-adsorption stage, cations represented by sodium ions in the water migrate to the cathode and are adsorbed on the active sites of the activated carbon fiber cloth 32. Due to the Dornan effect, anions, represented by chloride ions, migrate in the opposite direction at a faster rate, thus forming an ion depletion layer between the activated carbon fiber cloth 32 and the nanofiltration membrane 34. A second insulating guide net 35 is fixedly connected inside the electroadsorption box 1. The thickness of the second insulating guide net 35 is 0.3-0.5 mm, which is used to maintain the gap of the concentrate channel and collect the wastewater enriched with anions to the concentrate outlet. The first insulating guide net 33 and the second insulating guide net 35, through precise thickness design and asymmetrical structural layout, jointly ensure that the device can achieve precise removal of sodium ions and water-salt separation efficiently and stably under a low-voltage DC electric field. A fresh water pipe 36 is connected to the outside of the electroadsorption box 1, and a concentrate pipe 37 is connected to the outside of the electroadsorption box 1. The first insulating guide net 33 is connected to the fresh water pipe 36, and the second insulating guide net 35 is connected to the concentrate pipe 37. The other end of the fresh water pipe 36 and the concentrate pipe 37 are both connected to the outlet pipe 9. The desalination mechanism 3 also includes a DC regulated power supply 38, which outputs a voltage of 1.0-1.2V. The DC regulated power supply 38 is located outside the electro-adsorption box 1. An electrode converter 39 and a time relay 310 are located outside the DC regulated power supply 38. The positive and negative terminals of the DC regulated power supply 38 are connected to the graphite current collector 31 through the electrode converter 39. The time relay 310 is connected to the electrode converter 39 for signal control to switch the electrode converter 39, thereby realizing the reverse operation of the desalination mechanism 3. An outlet controller 8 is located outside the electro-adsorption box 1. The outlet controller 8 is connected to the freshwater tank 10. Both the electro-adsorption box 1 and the outlet controller 8 are connected to an outlet pipe 9. The positive and negative terminals of the DC regulated power supply 38 are connected to the graphite current collector 31 through the electrode converter 39. The time relay 310 is connected to the electrode converter 39 for signal control. Specifically, in the electroadsorption stage, a DC regulated power supply 38 applies a voltage of 1.0-1.2V. The cathode is connected to the graphite current collector 31, which is in contact with the activated carbon fiber cloth 32, via an electrode converter 39. Salt-containing raw water enters the electroadsorption tank 1 via a raw water pump 7. Under the influence of the electric field, sodium ions migrate towards the anode and are adsorbed onto the active sites of the activated carbon fiber cloth 32. Simultaneously, anions such as chloride ions migrate in the opposite direction at a higher rate, passing through the nanofiltration membrane 34 and concentrating in the anode region. Furthermore, an ion depletion layer is formed between the activated carbon fiber cloth 32 and the nanofiltration membrane 34. Fresh water is collected via the first insulating guide net 33 and flows through the fresh water pipe 3. 6. The water is discharged to the freshwater tank 10, while the concentrated water enriched with anions is discharged into the concentrated water tank 11 through the concentrated water pipe 37 via the second insulating guide net 35. When the activated carbon fiber cloth 32 is saturated with adsorption, the time relay 310 sends a signal to control the electrode converter 39 to switch the electrode polarity and realize the reverse polarity operation. This causes the sodium ions originally adsorbed on the activated carbon fiber cloth 32 to desorb under the action of the reverse electric field, and are discharged from the electro-adsorption box 1 with the flushing water and enter the concentrated water tank 11 to complete the electro-regeneration process. The nanofiltration membrane 34 is used to limit the migration of scale-forming ions such as calcium and magnesium to the depletion area and slow down the scaling process, thereby realizing continuous, efficient and low-energy desalination operation.
[0023] Please see the appendix Figure 7 - Appendix Figure 9 The connecting mechanism 4 includes a fixed plate 42, which is fixedly connected inside the freshwater tank 10 and the concentrated water tank 11. Both the freshwater tank 10 and the concentrated water tank 11 have mounting slots 41 inside, and the fixed plate 42 is placed in the mounting slots 41. A drive gear 43 is fixedly connected to the outside of the fixed plate 42, and an adjustment knob 44 is fixedly connected to the outside of the drive gear 43. Rotating the adjustment knob 44 drives the drive gear 43 to rotate, thereby using the meshing structure formed by the drive gear 43 and multiple tooth blocks 46 to drive the driven ring 45 to rotate. The driven ring 45 is fixedly connected to the outside of the fixed plate 42, and the driven ring 45 serves as the outer frame of the rotational closed structure. Multiple toothed blocks 46 are fixedly connected to the outer side of the moving ring 45, and multiple limiting shafts 47 are fixedly connected to the outer side of the fixed disk 42. Each of the multiple limiting shafts 47 is rotatably connected to a limiting block 49. The multiple limiting blocks 49 can form a ring by using a rotational closing structure. Multiple connecting rods 48 are rotatably connected to the outer side of the driven ring 45. The other end of the multiple connecting rods 48 is rotatably connected to the limiting block 49. Each of the multiple water outlet pipes 9 has a fixing groove 410 on its outer side. Multiple fixing shafts 411 are fixedly connected to the outer side of the fixed disk 42. Multiple guide grooves 412 are opened on the outer side of the driven ring 45. The fixing shafts 411 are slidably connected to the inner side of the guide grooves 412. Specifically, the end of the water outlet pipe 9 is inserted into the center hole of the fixed plate 42, so that the water outlet pipe 9 enters the placement slot 41 of the fresh water tank 10 or the concentrated water tank 11. Then, the adjusting knob 44 fixed on the outside of the driving gear 43 is rotated, and the driving gear 43 rotates synchronously. Since the driving gear 43 meshes with multiple tooth blocks 46 fixedly connected to the outside of the driven ring 45, the driven ring 45 rotates synchronously, so that the multiple guide grooves 412 opened on the outside of the driven ring 45 slide along the fixed shaft 411 on the fixed plate 42, so that the driven ring 45 rotates smoothly relative to the fixed plate 42. At the same time, it interacts with the driven ring. Multiple connecting rods 48, which are rotatably connected to the outside of the 45, begin to move, pushing multiple limiting blocks 49 respectively. Since the multiple limiting blocks 49 are rotatably connected to the limiting shafts 47 on the outside of the fixed plate 42, under the pushing and pulling action of the connecting rods 48, the multiple limiting blocks 49 begin to rotate synchronously towards the center around their respective limiting shafts 47, so that all the limiting blocks 49 are tightly closed at the fixing grooves 410 on the outside of the pipe fitting, forming a complete clamping ring, thereby fixing and sealing the water outlet pipe 9 on the fixed plate 42, so that the operator only needs to turn the knob to complete the connection, realizing a quick and stable connection between the pipes.
[0024] Please see the appendix Figure 5 - Appendix Figure 6 The cleaning mechanism 5 includes a contraction tube 51. The contraction tube 51 utilizes a Venturi flow channel design to create a local contraction, forming a high-speed, low-pressure zone, which accelerates the flow velocity of water after it enters the filter box 52. The contraction tube 51 is fixedly connected to the outside of the saline tank 6, and the filter box 52 is fixedly connected to the outside of the contraction tube 51. The filter box 52 is used to filter large particulate impurities in the saline solution and to quickly clean the filter structure. A filter screen 53 is fixedly connected inside the filter box 52. Large particulate impurities in the saline solution are filtered through the filter screen 53, causing the impurities to remain above the filter screen 53. A moving groove 54 is opened inside the filter box 52, and a pull rod 55 is slidably connected inside the moving groove 54. Multiple return springs 56 are fixedly connected internally, and the other end of the multiple return springs 56 is fixedly connected to the pull rod 55. After the pull rod 55 is manually pressed, it will automatically return to its original position. A guide groove 57 is provided on the outer side of the pull rod 55. A rotating shaft 58 is slidably connected inside the pull rod 55. A guide key 59 is fixedly connected to the outer side of the rotating shaft 58. The guide key 59 is slidably connected to the inner side of the guide groove 57. The pull rod 55, the guide groove 57, the rotating shaft 58 and the guide key 59 form a reverse rotation movement structure. A cleaning brush 510 is fixedly connected to the outer side of the pull rod 55. The cleaning brush 510 cleans the impurities above the filter screen 53 and makes the impurities fall into the collection groove 515. A limiting frame 511 is fixedly connected inside the filter box 52. A limiting groove 512 is opened on the outer side of the rotating shaft 58. The limiting frame 511 is rotatably connected to the inner side of the limiting groove 512. The position of the rotating shaft 58 is limited by the limiting frame 511. A limiting plate 513 is fixedly connected to the outer side of the rotating shaft 58. A limiting groove 514 is opened inside the filter box 52. The limiting plate 513 is rotatably connected to the inner side of the limiting groove 514. The limiting plate 513 can not only cooperate with the limiting frame 511 to limit the position of the rotating shaft 58, but also prevent water from flowing into the moving groove 54 inside the filter box 52. A storage groove 515 is opened inside the filter box 52. The storage groove 515 is connected to the water flow channel inside the filter box 52. A storage box 516 is slidably connected inside the storage groove 515. The storage box 516 is used to collect impurities in the storage groove 515 and to clean them up when there is too much. Specifically, the saline solution flows out of the saline tank 6, is accelerated through the Venturi channel of the contraction tube 51, and then enters the filter box 52. The high-speed water flow passes through the filter screen 53 fixed inside the box, and large particles of impurities in the saline solution are trapped on the upper surface of the filter screen 53. When there are too many impurities on the surface of the filter screen 53 and cleaning is required, the pull rod 55 is pressed down, causing it to slide down along the moving groove 54, compressing the return spring 56. During the downward movement, the guide groove 57 fixed on the pull rod 55 slides into contact with the guide key 59 on the rotating shaft 58, causing the rotating shaft 58 to rotate. This, in turn, causes the cleaning brush 510 to move along the rotating shaft. The filter screen 53 is rotated and cleaned. The impurities brushed off fall into the collection slot 515 at the bottom of the filter box 52 under the influence of gravity and water flow. The collection slot 515 contains a collection box 516 for collecting impurities. After cleaning the impurities, the pull rod 55 is released, and the compressed return spring 56 releases its elasticity, pushing the pull rod 55 to automatically return to its original position. The cleaning brush 510 remains unable to leave the surface of the filter screen 53 under the action of accelerated water flow. This allows the cleaning process to be completed quickly without disassembling any parts, avoiding potential damage to the equipment caused by the accumulation of impurities.
[0025] Working principle: In the electro-adsorption stage, under the action of a DC electric field of 1.0-1.2V, sodium ions in the raw water migrate to the cathode and are adsorbed by activated carbon fiber cloth 32. Chloride ions and other anions migrate in the opposite direction at a higher speed, pass through the nanofiltration membrane 34 and concentrate in the anode area, thereby forming an ion depletion layer between the adsorption layer and the nanofiltration membrane 34. The fresh water is collected by the first insulating guide net 33 and enters the fresh water tank 10. The concentrated water with anions is discharged to the concentrated water tank 11 through the second insulating guide net 35. After adsorption saturation, the time relay 310 triggers the electrode converter 39 to switch polarity and enter the reverse polarity regeneration stage, so that sodium ions are desorbed under the reverse electric field and discharged into the concentrated water tank 11 with the flushing water. The nanofiltration membrane 34 can restrict scale-forming ions from entering the depletion area and delay the scaling time, so that the device can achieve efficient desalination through the Donnan effect and the difference in ion migration rate. By inserting the end of the water outlet pipe 9 into the center hole of the fixed plate 42, the water outlet pipe 9 enters the placement slot 41 of the fresh water tank 10 or the concentrated water tank 11. Then, by rotating the adjusting knob 44 fixed to the outside of the driving gear 43, the driving gear 43 is driven to rotate. Since the driving gear 43 meshes with multiple tooth blocks 46 fixedly connected to the outside of the driven ring 45, the driven ring 45 rotates. This causes the multiple guide grooves 412 on the outside of the driven ring 45 to slide along the fixed shaft 411 on the fixed plate 42, thereby allowing the driven ring 45 to rotate smoothly relative to the fixed plate 42. Multiple connecting rods 48, which are rotatably connected to the outer side of the driven ring 45, begin to move, pushing multiple limiting blocks 49 respectively. Since the limiting blocks 49 are rotatably connected to the limiting shafts 47 on the outer side of the fixed plate 42, under the drive of the connecting rods 48, the multiple limiting blocks 49 rotate synchronously around their respective limiting shafts 47 toward the center and close tightly at the fixing groove 410 on the outer side of the water outlet pipe 9, forming a complete clamping ring, thereby fixing and sealing the water outlet pipe 9 on the fixed plate 42, realizing fast, stable and reliable sealing of the pipeline connection; The contraction tube 51 adopts a Venturi flow channel structure, which can guide the saline water into the filter box 52 to form a high-speed flow, allowing the water to quickly pass through the filter screen 53, while large particles of impurities are intercepted by the filter screen 53. Since the filter box 52 is equipped with a moving groove 54, the pull rod 55 is installed in the moving groove 54. One end of multiple return springs 56 is fixed to the inner wall of the moving groove 54, and the other end is connected to the pull rod 55 to provide return elasticity for the pull rod 55. A guide groove 57 is opened on the pull rod 55, and the rotating shaft 58 slides with the guide groove 57 through the guide key 59, which can form a reverse rotation movement structure. A cleaning brush 510 is installed at the lower end of the pull rod 55. When the pull rod 55 is pressed down, the rotating shaft 58 drives the cleaning brush 510 to rotate in the opposite direction, cleaning the impurities attached to the surface of the filter screen 53. The cleaned impurities fall into the filter box. The filter box 52 has a collection slot 515 inside, in which a collection box 516 is placed for collecting impurities. After the pull rod 55 is released, the return spring 56 pushes the pull rod 55 to automatically return to its original position, which greatly simplifies the maintenance process and prevents impurities from clogging the equipment. At the same time, since the limiting frame 511 is fixed inside the filter box 52, the axial displacement of the rotating shaft 58 is limited by the cooperation of the limiting slot 1 512 and the limiting frame 511. The outside of the rotating shaft 58 is fixedly connected to the limiting plate 513, which is embedded in the limiting slot 2 514 inside the filter box 52. The limiting plate 513 and the limiting frame 511 together constrain the position of the rotating shaft 58 and prevent water from flowing into the moving slot 54, thus avoiding affecting the return spring 56, extending the maintenance cycle, and improving the operating efficiency and service life of the electro-adsorption desalination device.
[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An electro-adsorption desalination device for sodium ion removal, comprising an electro-adsorption chamber (1), characterized in that, Two end plates (2) are fixedly connected to the outside of the electro-adsorption box (1). A desalination mechanism (3) is provided inside the electro-adsorption box (1). A fresh water tank (10) is provided outside the electro-adsorption box (1). A concentrated water tank (11) is provided outside the electro-adsorption box (1). A connecting mechanism (4) is provided inside both the fresh water tank (10) and the concentrated water tank (11). A saline water tank (6) is provided outside the electro-adsorption box (1). A raw water pump (7) is provided outside the electro-adsorption box (1). A cleaning mechanism (5) is provided outside the electro-adsorption box (1). The desalination mechanism (3) includes two graphite collector plates (31), both of which are fixedly connected inside the electro-adsorption box (1). Activated carbon fiber cloth (32) is fixedly connected inside the electro-adsorption box (1). A first insulating guide net (33) is fixedly connected inside the electro-adsorption box (1). A nanofiltration membrane (34) is fixedly connected inside the electro-adsorption box (1). A second insulating guide net (35) is fixedly connected inside the electro-adsorption box (1). A fresh water pipe (36) is connected to the outside of the electro-adsorption box (1). A concentrated water pipe (37) is connected to the outside of the electro-adsorption box (1).
2. The electroadsorption desalination device for sodium ion removal according to claim 1, characterized in that, The desalination mechanism (3) also includes a DC regulated power supply (38), which is located on the outside of the electro-adsorption box (1). An electrode converter (39) is located on the outside of the DC regulated power supply (38), and a time relay (310) is located on the outside of the DC regulated power supply (38). A water outlet controller (8) is located on the outside of the electro-adsorption box (1), and both the outside of the electro-adsorption box (1) and the water outlet controller (8) are connected to a water outlet pipe (9).
3. The electroadsorption desalination device for sodium ion removal according to claim 2, characterized in that, The connecting mechanism (4) includes a fixed plate (42), which is fixedly connected inside the freshwater tank (10) and the concentrated water tank (11). The freshwater tank (10) and the concentrated water tank (11) are both provided with a placement groove (41). A drive gear (43) is fixedly connected to the outside of the fixed plate (42). An adjustment knob (44) is fixedly connected to the outside of the drive gear (43). A driven ring (45) is fixedly connected to the outside of the fixed plate (42). Multiple tooth blocks (46) are fixedly connected to the outside of the driven ring (45). Multiple limiting shafts (47) are fixedly connected to the outside of the fixed plate (42). Limit blocks (49) are rotatably connected to the outside of the multiple limiting shafts (47). Multiple connecting rods (48) are rotatably connected to the outside of the driven ring (45). Fixed grooves (410) are provided on the outside of the multiple water outlet pipes (9).
4. The electroadsorption desalination device for sodium ion removal according to claim 1, characterized in that, The cleaning mechanism (5) includes a shrink tube (51), which is fixedly connected to the outside of the saline tank (6). A filter box (52) is fixedly connected to the outside of the shrink tube (51). A filter screen (53) is fixedly connected inside the filter box (52). A moving groove (54) is opened inside the filter box (52). A pull rod (55) is slidably connected inside the moving groove (54). A plurality of return springs (56) are fixedly connected inside the moving groove (54). A guide groove (57) is opened on the outside of the pull rod (55). A rotating shaft (58) is slidably connected inside the pull rod (55). A guide key (59) is fixedly connected to the outside of the rotating shaft (58). The guide key (59) is slidably connected to the inside of the guide groove (57). A cleaning brush (510) is fixedly connected to the outside of the pull rod (55).
5. The electroadsorption desalination device for sodium ion removal according to claim 1, characterized in that, The first insulating guide net (33) is connected to the fresh water pipe (36), and the second insulating guide net (35) is connected to the concentrated water pipe (37).
6. The electroadsorption desalination device for sodium ion removal according to claim 2, characterized in that, The positive and negative terminals of the DC regulated power supply (38) are connected to the graphite current collector (31) through the electrode converter (39), and the time relay (310) is signal connected to the electrode converter (39).
7. The electroadsorption desalination device for sodium ion removal according to claim 3, characterized in that, Multiple fixed shafts (411) are fixedly connected to the outer side of the fixed disk (42), and multiple guide grooves (412) are opened on the outer side of the driven ring (45). The fixed shafts (411) are slidably connected to the inner side of the guide grooves (412).
8. The electroadsorption desalination device for sodium ion removal according to claim 4, characterized in that, The filter box (52) is fixedly connected to a limiting frame (511), and a limiting groove (512) is opened on the outside of the rotating shaft (58). The limiting frame (511) is rotatably connected to the inside of the limiting groove (512).
9. The electroadsorption desalination device for sodium ion removal according to claim 4, characterized in that, A limiting disk (513) is fixedly connected to the outside of the rotating shaft (58), and a second limiting groove (514) is opened inside the filter box (52). The limiting disk (513) is rotatably connected to the inside of the second limiting groove (514).
10. The electroadsorption desalination device for sodium ion removal according to claim 4, characterized in that, The filter box (52) has a storage slot (515) inside, and a storage box (516) is slidably connected inside the storage slot (515).