A modular inter-electrode central flow-guided multi-stage adsorption device

Abstract

This application relates to the field of electroadsorption water treatment and discloses a modular, centrally guided multi-stage adsorption device, including a housing, a DC power supply, and an electrode assembly disposed inside the housing. The electrode assembly includes a positive electrode module and a negative electrode module arranged opposite each other. Both the positive and negative electrode modules are composed of multiple modular electrode units longitudinally spliced ​​together to form a multi-stage adsorption unit. An adsorption cavity is formed between the positive and negative electrode modules. Multiple central guide vanes are spaced apart in the adsorption cavity along the water flow direction. These central guide vanes are located at the lateral connections of the modular electrode units. By spaced central guide vanes and a water distribution network within the adsorption cavity, the hydrodynamic performance of the multi-stage adsorption process is optimized. The central guide vanes, located in the staggered space at the lateral connections of the modules, utilize their streamlined structure to divert the fluid with higher flow velocity and higher ion concentration at the center of the flow channel to both sides.

Description

Technical Field

[0001] This invention relates to the field of electroadsorption water treatment, specifically to a modular multi-stage adsorption device with central flow between electrodes. Background Technology

[0002] Electrosorption, also known as capacitive deionization (CDI), is a water treatment technology that removes charged ions or polar molecules from water using the principle of double-layer adsorption on electrode surfaces. Due to its advantages such as low energy consumption, no secondary pollution, and regenerable electrodes, it has been applied in brackish water desalination, industrial wastewater reuse, and hard water softening. Traditional electrosorption devices typically use multiple sets of parallel plate electrodes to form adsorption channels. As raw water flows through the gaps between the electrodes, ions in the water migrate to the electrode surface and are adsorbed under the influence of an electric field.

[0003] However, existing plate electroadsorption devices still face several technical bottlenecks in practical applications. Firstly, in terms of fluid dynamics, to ensure low flow resistance, the electrode spacing is typically small and the flow channel is straight. This structure results in the fluid primarily flowing in a laminar state between the electrodes, with a higher flow velocity and ion concentration in the central region of the channel, while the fluid velocity close to the electrode surface is slower. This laminar boundary layer effect limits the migration speed of ions from the center of the channel to the electrode surface, resulting in limited mass transfer efficiency. Especially when treating large flow rates or high-concentration influent, most of the water in the central region flows out of the channel without being fully purified, reducing the adsorption efficiency per pass. Although existing technologies use turbulent grids to increase fluid disturbance, this often significantly increases the system's head loss and easily causes channel blockage.

[0004] Secondly, regarding structural manufacturing and electrical connections, traditional designs tend to increase the area or length of individual electrode plates to improve the throughput of a single unit. Large electrode plates not only present significant manufacturing challenges and make flatness control difficult, but they are also prone to damage during transportation and assembly. If a part of the electrode plate fails, the entire plate often needs to be replaced, resulting in high maintenance costs. Furthermore, large electrode plates typically employ edge-collecting, where current is introduced from the edge, leading to a significant potential difference between the center and edge regions. This results in uneven adsorption and reduces the effective utilization rate of the electrode material. Simultaneously, the terminals directly exposed to the fluid are constantly energized and immersed, making them highly susceptible to electrochemical corrosion and affecting the operational stability of the equipment.

[0005] Furthermore, scaling and contamination on the electrode surface are another major factor limiting the long-term stable operation of electroadsorption devices. Over time, calcium and magnesium scale or organic contaminants accumulate on the electrode surface, leading to a decrease in adsorption capacity. Although existing devices are equipped with mechanical scraping mechanisms for online cleaning, their transmission structures typically use traditional mechanical dynamic seals, making the drive shaft prone to leakage due to seal wear at the housing point. Moreover, existing scraping mechanisms are mostly rigid connections; when encountering hard or thick scale layers on the electrode surface, they lack necessary buffering and avoidance mechanisms, easily causing the transmission mechanism to jam, or even scratching the expensive electrode coating, shortening the electrode's lifespan. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a modular, centrally guided, multi-stage adsorption device that solves the problem of slow ion migration from the center of the flow channel to the electrode surface, which limits mass transfer efficiency. In particular, when processing large flow rates or high-concentration influent, most of the water in the central region flows out of the flow channel without being fully purified, reducing the adsorption efficiency per pass.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a modular, centrally guided, multi-stage adsorption device, comprising a housing, a DC power supply, and an electrode assembly disposed within the housing. The electrode assembly includes a positive electrode module and a negative electrode module disposed opposite to each other. Both the positive and negative electrode modules are composed of multiple modular electrode units longitudinally spliced ​​together to form a multi-stage adsorption unit. An adsorption cavity is formed between the positive and negative electrode modules. Multiple central guide vanes are spaced apart in the adsorption cavity along the water flow direction. The central guide vanes are located at the lateral connection points of the modular electrode units. The housing is also provided with an inlet and an outlet. Multiple water distribution nets are spaced apart in the adsorption cavity along the water flow direction. The water distribution nets are respectively disposed at the water inlet front end of each stage of the modular electrode unit.

[0008] Preferably, it further includes a drive cleaning mechanism, which includes a motor, a magnetic coupler and a rotating shaft. The motor is mounted on a mounting plate outside the housing. The output end of the motor is connected to the active end of the magnetic coupler. The driven end of the magnetic coupler passes through the housing and is connected to the rotating shaft located inside the housing.

[0009] Preferably, a turntable is fixedly connected to the end of the rotating shaft, an eccentric shaft is provided on the turntable, a rotating frame is sleeved on the eccentric shaft, a connecting rod is connected to both ends of the rotating frame, and a brush for cleaning the electrode surface is connected to the end of the connecting rod away from the rotating frame.

[0010] Preferably, a sliding groove is provided inside the rotating frame, and a limiting block is sleeved on the outside of the eccentric shaft. The limiting block is slidably engaged in the sliding groove of the rotating frame to convert the rotational motion of the turntable into the reciprocating linear motion of the connecting rod.

[0011] Preferably, the connecting rod and the brush are connected by a connecting rod, and a buffer assembly is also provided between the connecting rod and the brush. The buffer assembly includes a sliding rod, a limiting plate and a return spring. One end of the sliding rod is fixed to the brush, and the other end passes through the limiting plate and extends into the cavity of the connecting rod. The return spring is sleeved in the cavity of the connecting rod and is located between the end of the sliding rod and the bottom of the cavity.

[0012] Preferably, multiple guide rods are arranged longitudinally on both sides of the inner wall of the housing, the top of the connecting rod is slidably sleeved on the guide rod, and the brush bristles of the brush are respectively attached to the relative inner surfaces of the positive electrode module and the negative electrode module.

[0013] Preferably, adjacent modular electrode units are fixedly connected by a longitudinal connecting slot, and a through power line conduit is provided inside the longitudinal connecting slot. The positive power line of the positive electrode module and the negative power line of the negative electrode module pass through the power line conduit. The modular electrode units of the positive electrode module and the negative electrode module are arranged in a concave and convex relative distribution at the splicing point.

[0014] Preferably, the modular electrode units are connected by a lateral connector, at which a staggered space is formed due to the thickness difference. The central guide vane has a streamlined wing-shaped structure, which is used to guide the fluid at the center of the adsorption cavity to the electrode surfaces on both sides.

[0015] Preferably, the water distribution network is an insulated mesh structure. The water distribution network located downstream of the central guide plate is used to rectify the fluid after it has been guided, so that the fluid enters the next stage of the modular electrode unit evenly.

[0016] Preferably, each of the modular electrode units has an independent connection point at the center of its back, and the positive power line and the negative power line are respectively connected in parallel or in series with the corresponding modular electrode unit through the connection point.

[0017] This invention provides a modular, multi-stage adsorption device with centrally guided flow between electrodes. It offers the following advantages: 1. This invention optimizes the fluid dynamics of the multi-stage adsorption process by spaced-out central guide vanes and water distribution nets within the adsorption chamber. The central guide vanes, located in the staggered space at the transverse connection of the modules, utilize their streamlined structure to divert the high-velocity fluid with high ion concentration at the center of the flow channel to both sides. This forces the fluid to scour the surfaces of the positive and negative electrode modules, breaking the mass transfer limitation imposed by the laminar boundary layer and achieving forced displacement of the fluid at the adsorption interface. Combined with the water distribution net downstream of the guide vanes, the fluid undergoes secondary rectification, ensuring a uniform and stable flow rate as it enters the next adsorption unit. This significantly improves the overall ion removal efficiency and electrode utilization of the device.

[0018] 2. This invention employs a self-cleaning structure combining magnetic coupling transmission and buffer protection, improving the sealing and reliability of the device's operation. The driving cleaning mechanism achieves non-contact transmission between the external motor and the internal rotating shaft through a magnetic coupler, avoiding the liquid leakage problems that easily occur in traditional mechanical dynamic sealing structures during long-term operation, and achieving complete physical isolation between electrical components and water-contacting components. Simultaneously, the spring buffer assembly installed between the transmission linkage and the brush provides flexible retraction space when encountering stubborn scale or significant frictional resistance during the cleaning process, preventing rigid jamming of the transmission mechanism or mechanical damage to the electrode surface, thus extending the service life of the core components.

[0019] 3. This invention utilizes modular splicing and built-in wiring design to improve the structural stability and electrical safety of the device. The positive and negative electrode modules are assembled from multiple standardized units through longitudinal connecting slots, and the splicing end faces have concave-convex mating structures with opposite directions, which not only prevents confusion during the installation of positive and negative electrode modules, but also enhances the longitudinal shear resistance of the electrode assembly. In addition, the through power line conduit opened in the longitudinal connecting slots seals the power supply line in an insulating channel, and together with the independent sealed wiring structure in the center of the back of the module, it achieves physical isolation between the power supply network and the water being treated, effectively avoiding electrochemical corrosion and short circuit faults of the wiring terminals, and facilitating the manufacturing and subsequent maintenance of the equipment. Attached Figure Description

[0020] Figure 1 This is a first-view perspective perspective view of the present invention; Figure 2 This is a second-view perspective perspective view of the present invention; Figure 3 This is a cross-sectional view of the housing of the present invention; Figure 4 This is a schematic diagram of the electrode connection plate of the present invention; Figure 5 This is the water distribution network diagram of the present invention; Figure 6 for Figure 5 Enlarged view at point B in the middle; Figure 7 for Figure 2 Enlarged view of point A in the middle; Figure 8 This is a cross-sectional view of the connecting rod of the present invention.

[0021] The components are as follows: 1. Housing; 2. DC power supply; 3. Positive power cord; 4. Negative power cord; 5. Positive module; 6. Negative module; 7. Horizontal connector; 8. Water distribution network; 9. Electrode connection plate; 10. Longitudinal connection slot; 11. Power cord conduit; 12. Central guide plate; 13. Rotating shaft; 14. Turntable; 15. Eccentric shaft; 16. Limiting block; 17. Rotating frame; 18. Connecting rod; 19. Connecting rod; 20. Limiting plate; 21. Sliding rod; 22. Return spring; 23. Brush; 24. Guide rod; 25. Mounting plate; 26. Motor; 27. Magnetic coupler; 28. Water outlet; 29. ​​Water inlet. Detailed Implementation

[0022] 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.

[0023] Example: Please see the appendix Figure 1 -Appendix Figure 8 This invention provides a modular inter-electrode central guide multi-stage adsorption device, including a housing 1, a DC power supply 2, an electrode assembly, a central guide plate 12, and a drive cleaning mechanism.

[0024] The housing 1 is made of a corrosion-resistant insulating material, such as rigid polyvinyl chloride (UPVC) or acrylonitrile-butadiene-styrene copolymer (ABS). An inlet 29 and an outlet 28 are respectively provided at both ends of the housing 1. The fluid to be treated enters through the inlet 29 and is discharged through the outlet 28 after treatment. A DC power supply 2 is located outside the housing 1 and is used to provide operating voltage for the electrolytic adsorption process within the device.

[0025] The electrode assembly is disposed inside the housing 1 and includes a positive electrode module 5 and a negative electrode module 6 arranged in parallel. Both the positive electrode module 5 and the negative electrode module 6 are composed of multiple modular electrode units sequentially spliced ​​along the longitudinal direction (i.e., the direction of water flow) to form a multi-stage adsorption unit. A gap is left between the positive electrode module 5 and the negative electrode module 6 to form an adsorption cavity for fluid to pass through.

[0026] Adjacent modular electrode units are fixedly connected by longitudinal connecting slots 10. The longitudinal connecting slots 10 are made of insulating rigid material, and their height is adapted to the thickness of the modular electrode units. Each modular electrode unit of the positive electrode module 5 and the negative electrode module 6 has a mating concave-convex structure on its splicing end face. Specifically, one end of the modular electrode unit has a protrusion, and the other end has a groove that matches the protrusion. To prevent confusion during the installation of the positive and negative electrode modules and to enhance the stability of the longitudinal connection, the splicing direction of the positive electrode module 5 is opposite to that of the negative electrode module 6. For example, if the positive electrode module 5 has a protrusion mating with a groove along the water flow direction, then the negative electrode module 6 has a groove mating with a protrusion along the water flow direction.

[0027] A through-type power cable conduit 11 is provided inside the longitudinal connecting slot 10. The positive power cable 3 and negative power cable 4 pass through the power cable conduit 11. Each modular electrode unit has a wiring hole at its center on the back. A sealing conductive element (e.g., a conductive bolt with a sealing ring) is installed in this wiring hole. One end of the sealing conductive element passes through the side wall of the longitudinal connecting slot 10 and extends into the power cable conduit 11 to be electrically connected to the power cable; the other end is connected to the modular electrode unit. The positive power cable 3 and negative power cable 4 are connected to their respective modular electrode units through the wiring hole, and can be configured as a series or parallel circuit according to processing requirements. This built-in wiring structure physically isolates the electrical connection points from the water in the adsorption chamber, avoiding contact corrosion and short-circuit risks.

[0028] Multiple central guide vanes 12 are spaced apart along the water flow direction within the adsorption chamber. The central guide vanes 12 are installed at the lateral connections of the modular electrode units. The modular electrode units are connected by lateral connectors 7, the thickness of which is less than the thickness of the modular electrode units, causing the lateral connections to be recessed inward relative to the electrode surface, forming a locally enlarged flow channel space. The central guide vanes 12 are positioned within this flow channel space, and their cross-section has a streamlined wing-like structure. When fluid flows through the central guide vanes 12, the fluid is diverted by the front end of the central guide vanes 12 and guided along the streamlined surface to the surfaces of the positive electrode module 5 and the negative electrode module 6 on both sides, forcing the fluid at the center of the adsorption chamber to migrate towards the electrode surface, increasing the probability of ion contact with the electrode surface.

[0029] Multiple water distribution nets 8 are also spaced apart along the water flow direction within the adsorption chamber. The water distribution nets 8 are mesh structures made of insulating rigid plastic. Each water distribution net 8 is located at the water inlet front end of each stage of the modular electrode unit. Specifically, the first-stage modular electrode unit has a water distribution net 8 at its water inlet end; a water distribution net 8 is also located downstream of the central guide vane 12 in each stage. The water distribution nets 8 located downstream of the central guide vane 12 are used to rectify the fluid after it has been guided, eliminate turbulence, and ensure that the fluid is distributed at a uniform speed into the next stage of the modular electrode unit, thus guaranteeing the stability of multi-stage adsorption.

[0030] To maintain the activity of the electrode surface, the device is also equipped with a drive cleaning mechanism. This mechanism includes a motor 26 mounted on an external mounting plate 25 of the housing 1. The output shaft of the motor 26 is connected to the driving end of a magnetic coupler 27, and the driven end of the magnetic coupler 27 passes through the housing 1 and is connected to a rotating shaft 13 located inside the housing. Through magnetic coupling transmission, physical isolation between the power source and the water-contacting components is achieved.

[0031] A turntable 14 is fixed to the end of the rotating shaft 13, and an eccentric shaft 15 is mounted on the turntable 14. A rotating frame 17 is sleeved on the eccentric shaft 15. A long, narrow groove is formed inside the rotating frame 17, and a limiting block 16 is sleeved on the outer side of the eccentric shaft 15, with the limiting block 16 slidingly engaged within the groove. When the motor 26 drives the turntable 14 to rotate, the eccentric shaft 15 drives the limiting block 16 to slide within the groove, while simultaneously driving the rotating frame 17 to reciprocate linearly in a direction perpendicular to the groove.

[0032] Connecting rods 18 are connected to both ends of the rotating frame 17, and the other end of the connecting rods 18 is connected to a brush 23 via a connecting rod 19. Guide rods 24 are arranged longitudinally on both sides of the inner wall of the housing 1, and the top of the connecting rod 19 is slidably sleeved on the guide rods 24, restricting the brush 23 from moving longitudinally. The bristles of the brush 23 are respectively attached to the relative inner surfaces of the positive electrode module 5 and the negative electrode module 6, and scrape off the deposits on the electrode surfaces during reciprocating motion.

[0033] A buffer assembly is provided between the connecting rod 19 and the brush 23 to prevent mechanical jamming. The buffer assembly includes a slide rod 21 fixed to the brush 23, a limiting plate 20 disposed within the connecting rod 19, and a return spring 22. One end of the slide rod 21 is fixed to the brush 23, and the other end extends through the limiting plate 20 into the internal cavity of the connecting rod 19. The return spring 22 is sleeved within the cavity of the connecting rod 19 and is located between the end of the slide rod 21 and the bottom of the cavity of the connecting rod 19. When the frictional resistance experienced by the brush 23 exceeds a preset value, the slide rod 21 compresses the return spring 22 and retracts into the connecting rod 19, providing a buffering protection function.

[0034] Working principle: In the fluid treatment stage, the fluid to be treated enters the device through the inlet (29) on the housing (1) under the drive of the external pump pressure. The fluid first encounters the water distribution net (8) located at the front end of the water inlet of the first-stage modular electrode unit. The water distribution net (8) uses its rigid insulating mesh structure to physically rectify the fluid, eliminate the jet impact and irregular eddies during water intake, and promote the fluid to enter the first-stage adsorption area with a uniform flow rate.

[0035] Meanwhile, the external DC power supply (2) is in operation. Current is transmitted through the positive power line (3) and negative power line (4) in the power line conduit (11) sealed inside the longitudinal connecting slot (10). Due to the physical isolation of the power line conduit (11), the line is completely isolated from the fluid. Current is transmitted to the positive electrode module (5) and the negative electrode module (6) through the connection point at the center of the back of each modular electrode unit. A stable DC electric field is established between the positive electrode module (5) and the negative electrode module (6) in the adsorption chamber. Charged ions or polar molecules in the fluid undergo directional migration under the drive of the electric field force, move towards the electrode surfaces with opposite polarities, and are adsorbed in the double layer of the electrode surface, thereby achieving desalination or purification of the fluid.

[0036] As the fluid flows through the first-stage adsorption unit and reaches the connection between modules, laminar stratification typically occurs, meaning the fluid velocity and ion concentration are high in the center of the channel, while the ion concentration is low near the electrode surface. At this point, the central guide vane (12) installed in the staggered space of the transverse connector (7) plays a crucial role. The streamlined, wing-shaped central guide vane (12) physically blocks the straight path through the center of the channel, forcing the insufficiently treated fluid in the central area to divert to both sides, directly scouring the surfaces of the positive electrode module (5) and the negative electrode module (6). This guiding effect disrupts the flow boundary layer on the electrode surface, replacing the fresh fluid at the adsorption interface and enhancing the mass transfer effect.

[0037] The fluid, after being disturbed by the central guide vane (12), is usually accompanied by micro-turbulence. In order to ensure the stability of the next stage of adsorption, the fluid then passes through the next stage water distribution network (8) located downstream of the guide vane. The water distribution network (8) rectifies the fluid again, restoring it to a stable laminar flow state before it enters the next stage modular electrode unit. Through this multi-stage cycle of "water distribution and rectification - electro-adsorption - central guide displacement - re-rectification - re-adsorption", the device effectively improves the processing efficiency of a single pass.

[0038] When the device needs maintenance after a certain period of operation, the drive cleaning mechanism is activated. The motor (26) is powered on and rotates, driving the active end of the magnetic coupler (27) to rotate. The magnetic torque penetrates the isolation wall of the housing (1) and is transmitted to the internal rotating shaft (13), realizing contactless and sealed power transmission. The rotating shaft (13) drives the turntable (14) to rotate, causing the eccentric shaft (15) on the turntable (14) to perform circular motion.

[0039] During this process, the limiting block (16) slides relative to the groove of the rotating frame (17), converting the rotational motion of the eccentric shaft (15) into the reciprocating linear motion of the rotating frame (17) perpendicular to the groove direction. This reciprocating thrust is transmitted to the connecting rod (19) through the connecting rod (18), which in turn drives the brush (23) to move longitudinally back and forth between the positive electrode module (5) and the negative electrode module (6) along the guide rod (24). The bristles of the brush (23) are in close contact with the electrode surface, and the scale or contaminants attached to the surface are removed by mechanical scraping. If a large resistance is encountered during the cleaning process, the buffer component inside the connecting rod (19) intervenes, the slide rod (21) compresses the return spring (22) and retracts, absorbing the impact force and preventing the mechanical structure from rigidly jamming or damaging the electrode surface. The cleaned dirt is finally discharged from the outlet pipe (28) with the water flow.

Claims

1. A modular, multi-stage adsorption device with centrally directed inter-electrode flow, comprising a housing (1), a DC power supply (2), and an electrode assembly disposed inside the housing (1), characterized in that: The electrode assembly includes a positive electrode module (5) and a negative electrode module (6) arranged opposite to each other. The positive electrode module (5) and the negative electrode module (6) are both composed of multiple modular electrode units spliced ​​longitudinally to form a multi-stage adsorption unit. An adsorption cavity is formed between the positive electrode module (5) and the negative electrode module (6). Multiple central guide plates (12) are arranged at intervals along the water flow direction in the adsorption cavity. The central guide plates (12) are located at the lateral connection of the modular electrode units. The housing (1) is also provided with an inlet pipe (29) and an outlet pipe (28). Multiple water distribution nets (8) are arranged at intervals along the water flow direction in the adsorption cavity. The water distribution nets (8) are respectively arranged at the water inlet front end of each stage of the modular electrode unit.

2. The modular inter-electrode centrally guided multi-stage adsorption device according to claim 1, characterized in that, It also includes a drive cleaning mechanism, which includes a motor (26), a magnetic coupler (27) and a rotating shaft (13). The motor (26) is mounted on a mounting plate (25) outside the housing (1). The output end of the motor (26) is connected to the active end of the magnetic coupler (27). The driven end of the magnetic coupler (27) passes through the housing (1) and is connected to the rotating shaft (13) located inside the housing (1).

3. The modular inter-electrode centrally guided multi-stage adsorption device according to claim 2, characterized in that, The end of the rotating shaft (13) is fixedly connected to a turntable (14), an eccentric shaft (15) is provided on the turntable (14), a rotating frame (17) is sleeved on the eccentric shaft (15), and connecting rods (18) are respectively connected to both ends of the rotating frame (17). A brush (23) for cleaning the electrode surface is connected to the end of the connecting rod (18) away from the rotating frame (17).

4. A modular, centrally guided, multi-stage adsorption device according to claim 3, characterized in that, The rotating frame (17) has a sliding groove, and the eccentric shaft (15) is fitted with a limiting block (16) on the outside. The limiting block (16) is slidably fitted in the sliding groove of the rotating frame (17) to convert the rotational motion of the turntable (14) into the reciprocating linear motion of the connecting rod (18).

5. A modular, centrally guided, multi-stage adsorption device according to claim 3, characterized in that, The connecting rod (18) is connected to the brush (23) by a connecting rod (19). A buffer assembly is also provided between the connecting rod (19) and the brush (23). The buffer assembly includes a sliding rod (21), a limiting plate (20) and a return spring (22). One end of the sliding rod (21) is fixed to the brush (23), and the other end passes through the limiting plate (20) and extends into the cavity of the connecting rod (19). The return spring (22) is sleeved in the cavity of the connecting rod (19) and is located between the end of the sliding rod (21) and the bottom of the cavity.

6. A modular, centrally guided, multi-stage adsorption device according to claim 3, characterized in that, Multiple guide rods (24) are arranged longitudinally on both sides of the inner wall of the housing (1). The top of the connecting rod (19) is slidably sleeved on the guide rod (24). The brush bristles of the brush (23) are respectively attached to the relative inner surfaces of the positive electrode module (5) and the negative electrode module (6).

7. A modular, centrally guided, multi-stage adsorption device according to claim 1, characterized in that, The adjacent modular electrode units are fixedly connected by a longitudinal connecting slot (10). A through power line conduit (11) is provided inside the longitudinal connecting slot (10). The positive power line (3) of the positive electrode module (5) and the negative power line (4) of the negative electrode module (6) pass through the power line conduit (11). The modular electrode units of the positive electrode module (5) and the negative electrode module (6) are arranged in a concave and convex relative distribution at the splicing point.

8. A modular, centrally guided, multi-stage adsorption device according to claim 1, characterized in that, The modular electrode units are also connected by a transverse connector (7), and a staggered space is formed at the transverse connector (7) due to the thickness difference. The central guide vane (12) has a streamlined wing structure and is used to guide the fluid at the center of the adsorption cavity to the electrode surfaces on both sides.

9. A modular multi-stage adsorption device with centrally guided inter-electrode flow according to claim 1, characterized in that, The water distribution net (8) is an insulated mesh structure. The water distribution net (8) located downstream of the central guide plate (12) is used to rectify the fluid after it has been guided, so that the fluid enters the next stage of the modular electrode unit evenly.

10. A modular, centrally guided, multi-stage adsorption device according to claim 7, characterized in that, Each modular electrode unit has an independent connection point at the center of its back. The positive power line (3) and the negative power line (4) are connected in parallel or in series with the corresponding modular electrode unit through the connection point.

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