Open type capacitive deionization desalting device

Abstract

The invention relates to the technical field of electrochemical desalination, and discloses an open type capacitive deionization desalination device which comprises a container with an opening in the top, an end face cathode is fixedly installed on the left side in the container, an end face anode is fixedly installed on the right side in the container, and a plurality of electrode units arranged in the horizontal direction are detachably installed in the container through a dismounting assembly. Two parallel fixed cylinders are fixedly connected to the front side of the container, a rubber piston is slidably and hermetically connected to the interior of each fixed cylinder, a movable column is coaxially and fixedly connected to the outer side of each rubber piston, and a second connecting pipe and a first connecting pipe are sequentially communicated to the outer surface of each fixed cylinder from top to bottom. Nitrogen is sprayed into the container, and when the nitrogen flows in the container in a bubble form, water flow in electrode gaps can be disturbed, ion diffusion boundary layers on the surfaces of the electrodes and ion exchange membranes can be broken, the migration rate of anions and cations in water to double electrode layers of the electrodes is increased, and the desalination efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrochemical desalination, in particular to an open capacitive deionization desalination device. BACKGROUND

[0002] Capacitive deionization (CDI) technology is an electrochemical desalination technology based on the principle of double-layer adsorption on the electrode surface. By applying a direct current voltage between the positive and negative electrodes, the anions and cations in the water migrate to the electrodes of different polarity and are adsorbed, and then the electrodes are recycled through the regeneration process. Because of its low energy consumption, no chemical additives, and simple operation, it has been widely researched and applied in seawater desalination, industrial wastewater reuse, and brackish water purification. Compared with traditional desalination technologies such as reverse osmosis and electrodialysis, CDI technology does not require high-pressure driving or complex membrane component maintenance, and it has a significant cost advantage in the treatment of low-salinity water bodies.

[0003] With the development of technology, open capacitive deionization desalination devices have gradually become a research hotspot. By using top-opening containers and overflow drainage, the problems of flow channel blockage, internal pressure accumulation leading to seal failure, and the need to disassemble the shell during maintenance in traditional closed CDI devices are effectively improved, further reducing the manufacturing and operation threshold of the equipment. However, there are still two real technical defects in the actual operation of existing open capacitive deionization desalination devices that need to be solved:

[0004] On the one hand, in terms of ion mass transfer efficiency, existing devices rely on passive water flow driven by natural overflow or bottom water inlet. The water flow in the electrode gap is prone to form areas with uneven flow rates, and stable ion diffusion boundary layers are easily formed near the electrode surface and ion exchange membrane, which limits the migration rate of ions in the water to the electrode double layer, making it difficult to further optimize desalination efficiency. On the other hand, in terms of electrode unit maintenance convenience, the electrode units of existing open devices are mostly installed using bolt fixation, integrated frame, or clamping with the inner wall of the container. When the electrodes show performance degradation due to long-term adsorption, or the ion exchange membrane needs to be replaced due to aging and damage, the operator needs to first disassemble the container top cover, disconnect the electrical connection of the end face electrode, and in some cases, remove the flow guide components in the flow channel, and use professional tools for disassembly. The operation process is tedious and time-consuming. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides an open capacitive deionization desalination device to solve the problems raised in the background art.

[0006] In order to achieve the above object, the application is implemented by the following technical scheme: An open type capacitive deionization desalination device, comprising a container with a top opening, an end face cathode is fixedly installed on the left side inside the container, an end face anode is fixedly installed on the right side inside the container, a plurality of electrode units arranged in the horizontal direction are detachably installed in the container through a disassembly and assembly assembly, two fixed barrels arranged in parallel are fixedly connected to the front side of the container, a rubber piston is slidingly and sealingly connected inside each fixed barrel, a movable column is coaxially fixedly connected to the outer side of the rubber piston, a connecting pipe two and a connecting pipe one are sequentially communicated from top to bottom on the outer surface of the fixed barrel, the end of the connecting pipe one away from the fixed barrel penetrates through the side wall of the container and extends to the inside, and a plurality of air injection pipes are installed along the length direction of the part of the connecting pipe one located in the container; two storage tanks are fixedly installed on the front side of the container corresponding to the position of the fixed barrel, the gas outlet of the storage tank is communicated with the end of the connecting pipe two away from the fixed barrel, the reciprocating movement of the movable column drives the rubber piston to reciprocate along the inner wall of the fixed barrel, so that the gas pressure in the fixed barrel periodically changes, and then the nitrogen gas in the storage tank is intermittently injected into the inside of the container through the connecting pipe two, the fixed barrel, the connecting pipe one and the air injection pipe.

[0007] Through the above technical scheme, the desalination electric field is constructed by the end face cathode, the end face anode and the plurality of electrode units, the disassembly and assembly assembly is matched to realize the detachability of the electrode unit, and the reciprocating transmission of the fixed barrel, the rubber piston and the movable column is matched with the storage tank and the air injection pipe to complete the intermittent nitrogen gas injection, so that efficient capacitive desalination and convenient electrode maintenance are realized, nitrogen gas disturbance strengthens ion mass transfer, avoids oxidation and adapts to the open structure without pressure accumulation, and stable operation of the device with low energy consumption is ensured.

[0008] Preferably, the disassembly and assembly assembly comprises a plurality of mounting racks arranged in parallel and fixedly installed on the inner side wall of the container, a connecting plate is fixedly connected to the top of each electrode unit, two symmetrically arranged fixed rods are vertically fixedly connected to the middle side of the top of the connecting plate, a through hole is formed in the top opening of the container corresponding to the position of the fixed rod, an extendable rotating rod is penetrated in the through hole, a limiting rod is fixedly connected to the outer side of the lower part of the rotating rod, a drive gear is rotatably connected to the inner side of the connecting plate through a bearing, two drive racks are symmetrically meshed on the two sides of the drive gear, the drive racks are slidingly matched with the inner side of the connecting plate, and an L-shaped limiting strip is fixedly connected to the end of each drive rack away from the drive gear, a groove matched with the end of the L-shaped limiting strip is formed in the inner side of the mounting rack, and the end of the L-shaped limiting strip can be embedded in the groove to realize the positioning of the electrode unit.

[0009] Through the technical scheme, through the transmission cooperation of the mounting frame, the connecting plate, the telescopic rotating rod, the drive gear, the drive rack and the L-shaped limiting strip, and the rotation limitation of the limiting rod on the rotating rod, precise positioning and quick disassembly of the electrode unit in the container are realized, electrode maintenance can be completed without complex tools, the operation difficulty and time consumption are greatly reduced, and the installation stability of the electrode unit in a non-operation state is ensured.

[0010] Preferably, one end of the drive rack is fixedly connected with a telescopic column, the outer part of the telescopic column is sleeved with a spring, one end of the spring is fixedly connected with one end of the drive rack, and the other end of the spring is fixedly connected with the outer part of the connecting plate.

[0011] Through the technical scheme, through the sliding guide of the telescopic column on the drive rack and the elastic reset action of the spring, precise meshing transmission of the drive rack along a stable track and the drive gear is realized, deviation and jamming are avoided, and the L-shaped limiting strip is quickly reset and embedded into the groove of the mounting frame, so that the reliability and convenience of the electrode unit disassembly positioning are ensured.

[0012] Preferably, the two drive racks are located on the upper and lower sides of the drive gear respectively, and are meshingly connected with the tooth surface of the drive gear, one end of the telescopic column away from the drive rack is fixedly connected with the inner side wall of the connecting plate, and the drive rack is slidingly guided by the telescopic column and the connecting plate.

[0013] Through the technical scheme, through the symmetrical meshing layout of the two drive racks on the upper and lower sides of the drive gear, and the vertical fixation of the telescopic column and the inner side wall of the connecting plate, the sliding guide cooperation of the drive rack is realized, when the drive gear rotates, the two drive racks are driven to move reversely and synchronously, deviation and stress offset of the electrode unit during disassembly are avoided, the sliding track of the drive rack is limited to prevent transmission jamming, and the stability and precision of the electrode unit positioning and disassembly are ensured.

[0014] Preferably, each electrode unit comprises a double-sided electrode, and both sides of the double-sided electrode are detachably connected with an insulating screen, one side of one insulating screen away from the double-sided electrode is detachably connected with a negative ion exchange membrane, and one side of the other insulating screen away from the double-sided electrode is detachably connected with a positive ion exchange membrane.

[0015] Through the technical scheme, through the cooperative cooperation of the double-sided electrode, the two insulating screens and the respectively connected negative ion exchange membrane and positive ion exchange membrane, and the detachable design of each component, the efficient selective adsorption of the electrode unit on the water body anion and cation is realized, direct wear of the double-sided electrode and the membrane is avoided, and when a single component fails, it can be replaced alone, so that the operation and maintenance cost and the waste of consumables are reduced.

[0016] Preferably, the rear side of the container is provided with a motor, the output end of the motor is fixedly connected with a synchronous wheel one, the outer side of the synchronous wheel one is provided with a synchronous wheel two through a synchronous belt, and the inner sides of the synchronous wheel one and the synchronous wheel two are fixedly connected with rotating shafts, and the outer sides of the rotating shafts are provided with a plurality of spoiler plates.

[0017] Through the above technical scheme, the motor provides power, the two rotating shafts are driven to rotate synchronously through the synchronous wheel one, the synchronous belt and the synchronous wheel two, the plurality of spoiler plates on the outer sides of the rotating shafts are combined, the uniform disturbance of the water flow in the container is realized, the ion diffusion boundary layer near the electrode surface and the ion exchange membrane is broken, and the desalination efficiency and uniformity are improved.

[0018] Preferably, one end of the rotating shaft away from the motor is movably connected to the inner side of the container through a bearing, one end of one of the rotating shafts is fixedly connected with a rotating disc, two connecting rods are movably connected to the outer eccentric part of the rotating disc, and the ends of the two connecting rods away from the rotating disc are movably connected with the ends of the movable columns.

[0019] Through the above technical scheme, the rotating stability is ensured through the bearing movably connected to the inner side of the container, the rotating disc is fixed to the rotating shaft, the outer eccentric part of the rotating disc is movably connected with the connecting rods, and the connecting rods are movably connected with the movable columns, the rotating motion of the rotating shaft is converted into the reciprocating motion of the movable column, no additional driving mechanism is needed to provide power for the sliding of the rubber piston in the fixed cylinder, and the transmission stability is ensured.

[0020] Preferably, the inner sides of the connecting pipe two and the connecting pipe one are provided with one-way valves, and the directions of the two one-way valves are opposite.

[0021] Through the above technical scheme, the one-way valves with opposite directions are installed in the connecting pipe two and the connecting pipe one, the nitrogen flow path is accurately controlled, the water body or the nitrogen is prevented from flowing back to the fixed cylinder and the storage tank in the opposite direction, and the intermittent nitrogen injection is stably performed.

[0022] Preferably, the top of the container is detachably connected with a cover plate, and a plurality of air holes are formed in the top of the cover plate.

[0023] Through the above technical scheme, the detachable cover plate on the top of the container and the plurality of air holes in the top of the cover plate realize the physical protection of the electrode unit and other core components in the container and the convenient opening and closing during maintenance, balance the air pressure inside and outside the container, ensure that the intermittent nitrogen injection is smoothly discharged, and avoid the influence of pressure accumulation in the container on the stable operation of the open structure.

[0024] Preferably, the top side of the cover plate is communicated with an overflow pipe, and the outer side of the container is sequentially communicated with a water inlet pipe and a drain pipe.

[0025] Through the above technical solution, a complete water flow cycle is achieved by using an overflow pipe on one side of the top of the cover plate, an inlet pipe and a drain pipe connected in sequence to the outside of the container, to stably inject the desalinated water, to allow the fresh water to overflow naturally with low energy consumption after desalination, and to efficiently discharge the concentrated water or cleaning wastewater. At the same time, a stable water level is ensured in the container to ensure that the water body is in full contact with the electrodes, thereby improving the desalination effect and facilitating the maintenance and emptying of the device.

[0026] This invention provides an open-type capacitor deionization and desalination device. It has the following advantages:

[0027] 1. This invention injects nitrogen gas into the interior of a container. As the nitrogen gas flows in the form of bubbles within the container, it disturbs the water flow between the electrodes, breaks the ion diffusion boundary layer on the electrode surface and the ion exchange membrane, accelerates the migration rate of anions and cations in the water to the electrode double layer, and improves desalination efficiency. In addition, combined with the open structure of the device, the injected nitrogen gas can smoothly overflow through the vent holes of the cover plate without causing pressure accumulation inside the container. This is perfectly compatible with the low-energy consumption design of overflow drainage. Furthermore, the poor solubility of nitrogen in water can prevent the dissolved oxygen content of the produced water from increasing. This invention can meet the needs of desalination scenarios that are sensitive to dissolved oxygen, such as the preparation of high-purity water, and significantly broadens the applicability of the device.

[0028] 2. This invention utilizes a disassembly and assembly assembly consisting of a drive gear, a meshing rack, an L-shaped limiting strip, and a retractable rotating rod. By simply adjusting the limiting state with the rotating rod, the rack can be driven to quickly disengage or lock the L-shaped limiting strip from the mounting bracket groove. Combined with the adaptive design of the electrode unit and the container guide structure, it enables quick insertion and removal of the electrode unit by a single person. This convenient disassembly method not only significantly shortens the replacement and maintenance time when the electrode unit is contaminated, aged, or malfunctioning, avoiding interruptions in desalination operations due to overall shutdown, but also avoids the physical damage to the inner wall of the container, other electrodes, and ion exchange membranes caused by traditional forced disassembly, protecting the structural integrity of the core components of the device.

[0029] 3. By setting up a structure in which a rotating shaft drives a baffle plate to rotate, the present invention can create an active and uniform disturbance to the water flow in the container. When the baffle plate rotates with the rotating shaft, it can break the ion diffusion boundary layer on the electrode surface and near the ion exchange membrane, accelerate the migration rate of anions and cations in the water to the end-face cathode, end-face anode and double-layer on the surface of the double electrode, reduce the desalination efficiency decay caused by local low ion concentration, and significantly improve the overall desalination performance. At the same time, the rotating baffle plate can drive the water flow to form a slight turbulence in the container, avoid the deposition of suspended impurities and salt particles desorbed from the electrode in the gaps between the electrode units or at the bottom of the flow channel, reduce the risk of device blockage, and reduce the number of downtime maintenance caused by frequent cleaning of the flow channel. Attached Figure Description

[0030] Figure 1 This is a perspective view of the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of the container of the present invention;

[0032] Figure 3 This is a schematic diagram of the cover plate structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the rotating rod structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the anion exchange membrane structure of the present invention;

[0035] Figure 6 This is a cross-sectional view of the fixed cylinder of the present invention;

[0036] Figure 7 This is a schematic diagram of the connecting plate structure of the present invention;

[0037] Figure 8 for Figure 3 Enlarged view of point A in the middle;

[0038] Figure 9 for Figure 7 Enlarged view of point B in the middle;

[0039] Figure 10 for Figure 5 A magnified view of point C in the middle.

[0040] Among them, 1. Container; 2. Cover plate; 301. Rotating disk; 302. Connecting rod; 303. Fixed cylinder; 304. Connecting pipe one; 305. Storage tank; 306. Connecting pipe two; 307. Rubber piston; 308. Moving column; 309. Jet pipe; 4. End face cathode; 501. Motor; 502. Synchronous pulley one; 503. Synchronous belt; 504. Synchronous pulley two; 6. Water inlet pipe; 7. Vent hole; 801. Rotating shaft; 8 02. Turbine plate; 9. Electrode unit; 901. Anion exchange membrane; 902. Insulating mesh; 903. Double-sided electrode; 904. Cation exchange membrane; 10. End face anode; 11. Mounting bracket; 12. Connecting plate; 13. Fixing rod; 14. Rotating rod; 15. Limiting rod; 16. Drive gear; 17. Drive rack; 18. L-shaped limiting strip; 19. Telescopic column; 20. Spring; 21. Drain pipe; 22. Overflow pipe. Detailed Implementation

[0041] 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.

[0042] Please see the appendix Figure 1 - Appendix Figure 10 This invention provides an open-type capacitive deionization device, comprising a container 1 with a top opening. An end-face cathode 4 is fixedly installed on the left side of the container 1, and an end-face anode 10 is fixedly installed on the right side. Multiple horizontally arranged electrode units 9 are detachably installed inside the container 1 via a disassembly assembly. Two parallel fixed cylinders 303 are fixedly connected to the front of the container 1. A rubber piston 307 is slidably and sealed inside each fixed cylinder 303. A movable column 308 is coaxially fixedly connected to the outside of the rubber piston 307. A connecting pipe 2 306 and a connecting pipe 1 304 are sequentially connected from top to bottom on the outer surface of the fixed cylinder 303. The connecting pipe 1 304 is located away from the fixed cylinder 303. One end of the connecting pipe 304 penetrates the side wall of container 1 and extends into the interior. Multiple jet pipes 309 are installed along the length of the portion of the connecting pipe 304 located inside container 1. Two storage tanks 305 are fixedly installed on the front side of container 1 corresponding to the fixed cylinder 303. The outlet of the storage tank 305 is connected to the end of the connecting pipe 306 away from the fixed cylinder 303. The reciprocating movement of the movable column 308 drives the rubber piston 307 to slide back and forth along the inner wall of the fixed cylinder 303, causing the gas pressure inside the fixed cylinder 303 to change periodically. This causes the nitrogen in the storage tank 305 to be intermittently injected into the interior of container 1 through the connecting pipe 306, the fixed cylinder 303, the connecting pipe 304, and the jet pipes 309.

[0043] Specifically, during operation, a DC voltage is applied to the end-face cathode 4, end-face anode 10, and electrode unit 9, forming a uniform electric field inside container 1. Anions in the demineralized water are driven by this electric field to migrate towards the end-face anode 10, while cations migrate towards the end-face cathode 4. During this process, the ion exchange membrane of electrode unit 9 enables selective ion transport, preventing electrode oxidation and ensuring that adsorption sites are not ineffectively occupied. Simultaneously, the reciprocating movement of the movable column 308 drives the rubber piston 307 to slide along the inner wall of the fixed cylinder 303, causing periodic changes in the internal gas pressure of the fixed cylinder 303, thereby sequentially transferring nitrogen gas from storage tank 305 through... Connecting pipe 2 306, fixed cylinder 303, and connecting pipe 1 304 are intermittently sprayed into the container 1 through the jet pipe 309. When the nitrogen flows in the form of bubbles, it can disturb the water flow between the electrodes, break the ion diffusion boundary layer on the electrode surface and near the ion exchange membrane, accelerate the migration of anions and cations to the electrode double layer, and improve the desalination efficiency. In addition, combined with the top opening structure of the container 1, the sprayed nitrogen can overflow smoothly without causing internal pressure accumulation, which is compatible with the low energy consumption design of overflow drainage. At the same time, the characteristic of nitrogen being poorly soluble in water can avoid the increase of dissolved oxygen content in the produced water, meeting the needs of desalination scenarios that are sensitive to dissolved oxygen.

[0044] The assembly includes multiple parallel mounting brackets 11 fixedly installed on the inner wall of container 1. Each electrode unit 9 is fixedly connected to a connecting plate 12 at its top. Two symmetrically arranged fixing rods 13 are vertically fixedly connected to the middle of the top of the connecting plate 12. A through hole is opened at the top opening of container 1 corresponding to the position of the fixing rod 13. A telescopic rotating rod 14 passes through the through hole. A limit rod 15 is fixedly connected to the lower outer side of the rotating rod 14. A drive gear 16 is rotatably connected to the inner side of the connecting plate 12 through a bearing. Two drive racks 17 are symmetrically meshed on both sides of the drive gear 16. The drive racks 17 slide with the inner side of the connecting plate 12. An L-shaped limit strip 18 is fixedly connected to the end of each drive rack 17 away from the drive gear 16. A groove is opened on the inner side of the mounting bracket 11 to fit the end of the L-shaped limit strip 18. The end of the L-shaped limit strip 18 can be embedded in the groove to achieve the positioning of the electrode unit 9. One end of the drive rack 17 is fixedly connected to a telescopic column 19, and a spring 20 is sleeved on the outside of the telescopic column 19. One end of the spring 20 is fixedly connected to one end of the drive rack 17, and the other end of the spring 20 is fixedly connected to the outside of the connecting plate 12.

[0045] Specifically, the assembly and disassembly mechanism achieves convenient assembly and disassembly and stable positioning of the electrode unit 9 through a transmission engagement and elastic reset structure. During operation, by lifting and rotating the retractable rotating rod 14, the drive gear 16 on the inner side of the connecting plate 12 is driven to rotate. The drive gear 16 meshes with the drive racks 17 on both sides, causing the drive racks 17 to slide along the inner side of the connecting plate 12 and drive the L-shaped limiting strip 18 to move synchronously. This allows the end of the L-shaped limiting strip 18 to detach from or embed into the groove on the inner side of the mounting bracket 11, completing the disassembly or positioning of the electrode unit 9. The spring 20 outside the telescopic column 19 can be engaged with the drive rack 17. 7. When moving, it generates elastic deformation. After the operating force is removed, the rack 17 is reset by the reset force to ensure the precise fit between the L-shaped limit bar 18 and the groove. The limit bar 15 at the bottom of the rotating rod 14 can cooperate with the fixed rod 13 after the electrode unit 9 is installed to limit the rotation of the rotating rod 14, preventing the L-shaped limit bar 18 from accidentally dislodging in the non-operating state. This greatly simplifies the replacement process of the electrode unit 9, reduces maintenance time, and avoids physical damage to the inner wall of the container 1, the electrode unit 9 and the ion exchange membrane caused by traditional forced disassembly, thus ensuring the structural integrity and operational stability of the core components of the device.

[0046] Two drive racks 17 are located on the upper and lower sides of the drive gear 16 respectively, and are meshed with the tooth surface of the drive gear 16. The end of the telescopic column 19 away from the drive rack 17 is vertically fixed to the inner side wall of the connecting plate 12. The drive rack 17 forms a sliding guide fit with the connecting plate 12 through the telescopic column 19.

[0047] Specifically, the symmetrical meshing arrangement of the two drive racks 17 on the upper and lower sides of the drive gear 16 allows the drive gear 16 to rotate and drive the two drive racks 17 to move in opposite directions. This ensures that the L-shaped limiting strips 18 on both sides of the electrode unit 9 can simultaneously disengage from or embed into the grooves of the mounting bracket 11, avoiding positioning offset of the electrode unit 9 caused by unilateral force and ensuring the symmetry and stability of the disassembly and assembly process. The vertical fixation of the telescopic column 19 to the inner wall of the connecting plate 12 and its sliding guide engagement with the drive racks 17 restrict the sliding trajectory of the drive racks 17, preventing them from shifting or jamming when meshing with the drive gear 16, ensuring smooth meshing transmission. At the same time, the reset action of the spring 20 ensures the accuracy of the drive racks 17 when resetting, preventing the L-shaped limiting strips 18 from failing to accurately align with the grooves of the mounting bracket 11 due to transmission deviation, thereby improving the positioning reliability of the electrode unit 9 after installation.

[0048] Each electrode unit 9 includes a double-sided electrode 903, and insulating meshes 902 are detachably connected to both sides of the double-sided electrode 903. An anion exchange membrane 901 is detachably connected to one side of the insulating mesh 902 away from the double-sided electrode 903, and a cation exchange membrane 904 is detachably connected to the other side of the insulating mesh 902 away from the double-sided electrode 903.

[0049] Specifically, each electrode unit 9 achieves efficient desalination and low maintenance costs through the coordinated functions of its components. The double-sided electrode 903, as the core ion adsorption carrier, can simultaneously adsorb anions and cations in the water on both sides, significantly increasing the ion adsorption capacity per unit space and supporting the overall desalination efficiency of the device. The insulating mesh 902 on both sides of the double-sided electrode 903 can ensure smooth water flow through the electrode gap while avoiding physical wear caused by direct contact between the double-sided electrode 903 and the ion exchange membrane, thus extending the service life of the membrane module. The anion exchange membrane 901 and cation exchange membrane 904, respectively connected to the outside of the insulating mesh 902, can play a role in selective ion transport, allowing only anions to pass through the anion exchange membrane 901 and cations to pass through the cation exchange membrane 904. This effectively blocks the acidic functional groups generated by electrode oxidation from combining with opposite ions, ensuring that the adsorption sites on the surface of the double-sided electrode 903 are not ineffectively occupied and maintaining high current efficiency during the desalination process.

[0050] A motor 501 is installed at the rear of container 1. A synchronous pulley 502 is fixedly connected to the output end of motor 501. A synchronous pulley 504 is installed on the outer side of synchronous pulley 502 via a synchronous belt 503. A rotating shaft 801 is fixedly connected to the inner side of both synchronous pulleys 502 and 504. Multiple baffles 802 are installed on the outer side of rotating shaft 801. The end of rotating shaft 801 furthest from motor 501 is movably connected to the inner side of container 1 via a bearing. A rotating disk 301 is fixedly connected to one end of one of the rotating shafts 801. Two connecting rods 302 are rotatably connected to the eccentric outer part of rotating disk 301. The ends of the two connecting rods 302 furthest from rotating disk 301 are movably connected to one end of a movable column 308. One-way valves are installed inside both connecting pipe 306 and connecting pipe 304, with opposite conduction directions.

[0051] Specifically, the power provided by the motor 501, through the transmission of synchronous pulley 502, synchronous belt 503, and synchronous pulley 504, can drive the two rotating shafts 801 to rotate synchronously. This causes multiple baffles 802 on the outside of the rotating shafts 801 to uniformly agitate the water in the container 1, breaking the ion diffusion boundary layer on the electrode surface and near the ion exchange membrane, accelerating the migration of anions and cations in the water to the electrode double layer, and improving desalination efficiency and uniformity. At the same time, the rotation of one of the rotating shafts 801 will drive the rotating disk 301 to rotate synchronously, and the outside of the rotating disk 301... The eccentric connecting rod 302 converts the rotational motion into the reciprocating movement of the movable column 308, providing power for the sliding of the rubber piston 307 in the fixed cylinder 303. No additional independent drive mechanism is required, effectively reducing the overall energy consumption of the device. The one-way valves with opposite conduction directions inside the connecting pipe 2 306 and the connecting pipe 1 304 can strictly limit the unidirectional flow of fluid, ensuring that the nitrogen in the storage tank 305 can only enter the container 1, preventing nitrogen backflow or water from entering the fixed cylinder 303 and the storage tank 305 in the opposite direction, thus ensuring the stability of the intermittent nitrogen injection.

[0052] Specifically, a cover plate 2 is detachably connected to the top of the container 1, and multiple vent holes 7 are provided on the top of the cover plate 2. An overflow pipe 22 is connected to one side of the top of the cover plate 2, and an inlet pipe 6 and a drain pipe 21 are connected to the outside of the container 1 in sequence. The removable cover plate 2 on the top of container 1 provides physical protection for core components such as the internal electrode unit 9 and rotating shaft 801, preventing external impurities from falling into the water and affecting the desalination effect. It also provides operating space for maintenance and replacement of the electrode unit 9 through easy disassembly. The multiple vent holes 7 on the top of the cover plate 2 allow the intermittently injected nitrogen gas in container 1 to overflow smoothly, effectively preventing the accumulation of internal air pressure from disrupting the low-energy operation of the open flow channel. At the same time, it balances the air pressure inside and outside container 1, ensuring the stability of the overflow and drainage process. The overflow pipe 22 connected to one side of the top of the cover plate 2 allows the desalinated fresh water to overflow naturally after filling container 1 from bottom to top. The water inlet pipe 6 and the drain pipe 21 connected to the outside of container 1 respectively realize the stable injection of desalinated water and the efficient discharge of concentrated water and washing wastewater after desalination, forming a complete water circulation.

[0053] Working principle: When using this device, its operating principle includes the following:

[0054] First, the water to be desalinated is injected into the container 1 through the inlet pipe 6 on the outside, and the cover plate 2 with vent holes 7 is closed to ensure the pressure balance of the open structure of the device. Then, a preset DC voltage is applied to the end cathode 4, end anode 10 and electrode unit 9 to form a uniform electric field inside the container 1, laying the foundation for ion migration. Each electrode unit 9 consists of a double-sided electrode 903, insulating meshes 902 on both sides, and anion exchange membranes 901 and cation exchange membranes 904 on the outside. The insulating meshes 902 ensure unobstructed water flow, and the ion exchange membranes enable selective transport of anions and cations, preventing electrode oxidation.

[0055] The motor 501 on the rear side of container 1 is started. The output of motor 501 drives synchronous pulley 502 to rotate. Synchronous pulley 502 drives synchronous pulley 504 to rotate synchronously through synchronous belt 503, which in turn drives the two rotating shafts 801 to rotate coaxially. Multiple baffles 802 on the outer side of rotating shaft 801 rotate with the shaft, forming a uniform disturbance to the water in container 1, breaking the ion diffusion boundary layer on the electrode surface and near the ion exchange membrane, accelerating the migration of anions and cations in the water to the corresponding electrode double layer, improving the uniformity and efficiency of desalination, and reducing the deposition of suspended impurities in the electrode gap. The rotating disk 301, which is fixed coaxially with rotating shaft 801, rotates synchronously with the shaft. The two connecting rods 302 connected to the eccentric part of the outer edge of rotating disk 301 swing back and forth, thereby pulling the movable column 308 to move back and forth along the axial direction of fixed cylinder 303. The rubber piston 307 on the inner side of movable column 308 slides synchronously in fixed cylinder 303, causing the air pressure inside fixed cylinder 303 to change periodically. When the rubber piston 307 moves outward, nitrogen gas in the storage tank 305 is drawn into the fixed cylinder 303 through the connecting pipe 306; when the rubber piston 307 moves inward, nitrogen gas is transported to multiple jet pipes 309 in the container 1 through the connecting pipe 304, achieving intermittent injection. As the nitrogen bubbles rise in the water, they further disturb the water flow, enhancing the mass transfer effect. Furthermore, the injected nitrogen gas overflows smoothly through the vent holes 7 of the cover plate 2 without pressure accumulation, which is compatible with the low-energy design of overflow drainage. Simultaneously, nitrogen gas is poorly soluble in water, preventing an increase in dissolved oxygen in the produced water, making it suitable for high-purity water preparation scenarios.

[0056] The desalinated freshwater overflows and is collected through the overflow pipe 22 on one side of the cover plate 2. The concentrated water or washing wastewater generated during the desalination process is discharged through the drain pipe 21 on the outside of the container 1, completing a single desalination cycle.

[0057] When electrode unit 9 becomes contaminated, its performance degrades, or the membrane module ages due to long-term use, it can be quickly disassembled and replaced using the following steps:

[0058] Pull upwards the retractable rotating rod 14 inside the through hole at the top of container 1, causing the limiting rod 15 at the bottom of the rotating rod 14 to disengage from the abutment state with the fixed rod 13, thus releasing the rotation restriction; rotate the rotating rod 14, causing the bottom of it to drive the drive gear 16 on the inner side of the connecting plate 12 to rotate, and the drive gear 16 meshes with the drive racks 17 on the upper and lower sides, driving the two drive racks 17 to move in opposite directions along the guide of the telescopic column 19. The L-shaped limiting strip 18 at the end of the drive rack 17 moves synchronously, causing its end to disengage from the matching groove on the inner side of the mounting bracket 11, thus releasing the positioning constraint of the electrode unit 9; pull upwards the fixed rod 13, and the electrode unit 9 together with the connecting plate 12 can be pulled out of the container 1 as a whole, completing the disassembly; during installation, the operation is reversed, and the restoring force of the spring 20 can assist the L-shaped limiting strip 18 to quickly embed into the groove, achieving precise positioning and fixation of the electrode unit 9.

[0059] 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 open-type capacitor deionization and desalination device, characterized in that, The container (1) includes a top-opening container. Inside the container (1), a cathode (4) is fixedly installed on the left side and an anode (10) is fixedly installed on the right side. Multiple electrode units (9) arranged horizontally are detachably installed inside the container (1) via a disassembly assembly. Two parallel fixed cylinders (303) are fixedly connected to the front of the container (1). A rubber piston (307) is slidably and sealed inside each fixed cylinder (303). A movable column (308) is coaxially fixedly connected to the outside of the rubber piston (307). Connecting pipe two (306) and connecting pipe one (304) are connected sequentially from top to bottom on the outer surface of the fixed cylinder (303). The end of the connecting pipe one (304) away from the fixed cylinder (303) passes through the side of the container (1). The wall extends into the interior, and the portion of the connecting pipe 1 (304) located inside the container (1) is equipped with multiple jet pipes (309) along its length; two storage tanks (305) are fixedly installed on the front side of the container (1) corresponding to the fixed cylinder (303). The outlet of the storage tank (305) is connected to the end of the connecting pipe 2 (306) away from the fixed cylinder (303). The reciprocating movement of the movable column (308) drives the rubber piston (307) to slide back and forth along the inner wall of the fixed cylinder (303), causing the gas pressure inside the fixed cylinder (303) to change periodically, thereby intermittently spraying the nitrogen in the storage tank (305) into the container (1) through the connecting pipe 2 (306), the fixed cylinder (303), the connecting pipe 1 (304), and the jet pipes (309).

2. The open-type capacitor deionization and desalination device according to claim 1, characterized in that, The assembly and disassembly assembly includes multiple parallel mounting brackets (11) fixedly installed on the inner side wall of the container (1). Each electrode unit (9) is fixedly connected to a connecting plate (12) at its top. Two symmetrically arranged fixing rods (13) are vertically fixedly connected to the middle of the top of the connecting plate (12). A through hole is provided at the top opening of the container (1) corresponding to the position of the fixing rod (13). A retractable rotating rod (14) is inserted through the through hole. A limit rod (15) is fixedly connected to the lower outer side of the rotating rod (14). The connecting plate ( 12) A drive gear (16) is rotatably connected to the inner side via a bearing. Two drive racks (17) are symmetrically meshed on both sides of the drive gear (16). The drive racks (17) slide with the inner side of the connecting plate (12). An L-shaped limiting strip (18) is fixedly connected to one end of each drive rack (17) away from the drive gear (16). A groove adapted to the end of the L-shaped limiting strip (18) is provided on the inner side of the mounting bracket (11). The end of the L-shaped limiting strip (18) can be embedded in the groove to realize the positioning of the electrode unit (9).

3. The open-type capacitor deionization and desalination device according to claim 2, characterized in that, One end of the drive rack (17) is fixedly connected to a telescopic column (19), and a spring (20) is sleeved on the outside of the telescopic column (19). One end of the spring (20) is fixedly connected to one end of the drive rack (17), and the other end of the spring (20) is fixedly connected to the outside of the connecting plate (12).

4. The open-type capacitor deionization and desalination device according to claim 3, characterized in that, The two drive racks (17) are located on the upper and lower sides of the drive gear (16) respectively, and are meshed with the tooth surface of the drive gear (16). The end of the telescopic column (19) away from the drive rack (17) is vertically fixedly connected to the inner sidewall of the connecting plate (12). The drive rack (17) forms a sliding guide fit with the connecting plate (12) through the telescopic column (19).

5. The open-type capacitor deionization and desalination device according to claim 1, characterized in that, Each of the electrode units (9) includes a double-sided electrode (903), and an insulating mesh (902) is detachably connected to both sides of the double-sided electrode (903). An anion exchange membrane (901) is detachably connected to the side of one of the insulating meshes (902) away from the double-sided electrode (903), and a cation exchange membrane (904) is detachably connected to the side of the other insulating mesh (902) away from the double-sided electrode (903).

6. The open-type capacitor deionization and desalination device according to claim 1, characterized in that, A motor (501) is installed on the rear side of the container (1). A synchronous pulley (502) is fixedly connected to the output end of the motor (501). A synchronous pulley (504) is installed on the outer side of the synchronous pulley (502) via a synchronous belt (503). A rotating shaft (801) is fixedly connected to the inner side of both the synchronous pulley (502) and the synchronous pulley (504). Multiple baffles (802) are installed on the outer side of the rotating shaft (801).

7. An open-type capacitor deionization and desalination device according to claim 6, characterized in that, The end of the rotating shaft (801) away from the motor (501) is movably connected to the inner side of the container (1) via a bearing. One end of the rotating shaft (801) is fixedly connected to a rotating disk (301). Two connecting rods (302) are rotatably connected to the outer eccentric part of the rotating disk (301). The ends of the two connecting rods (302) away from the rotating disk (301) are respectively movably connected to one end of the movable column (308).

8. The open-type capacitor deionization and desalination device according to claim 1, characterized in that, Both the second connecting pipe (306) and the first connecting pipe (304) are equipped with one-way valves, and the two one-way valves have opposite conduction directions.

9. An open-type capacitor deionization and desalination device according to claim 1, characterized in that, The top of the container (1) is detachably connected to a cover plate (2), and the top of the cover plate (2) has multiple ventilation holes (7).

10. An open-type capacitor deionization and desalination device according to claim 9, characterized in that, An overflow pipe (22) is connected to the top side of the cover plate (2), and an inlet pipe (6) and a drain pipe (21) are connected to the outside of the container (1) in sequence.

Images