A plate electrolyzer arrangement

Abstract

The application discloses a plate electrolytic cell device, and relates to the technical field of electrochemical water treatment and resource recovery. The device comprises a cell body with a quadrilateral cross-section inner cavity, an electrode group arranged in the inner cavity, and a water inlet and a water outlet in communication with the inner cavity, and the electrode group comprises a plurality of electrode sheets arranged in parallel at intervals. A turbulence structure is arranged on the side wall of the inner cavity, and the turbulence structure is used for guiding fluid to flow along the inner cavity wall surface and breaking flow dead zones. The application eliminates the fluid stagnation and vortex phenomenon at the right-angle corner of the quadrilateral inner cavity by arranging the turbulence structure on the side wall of the inner cavity, so that each region of the electrode surface can obtain sufficient reactant renewal, the concentration difference polarization is effectively inhibited, the current efficiency is improved, the side reaction, scaling and bubble accumulation are reduced, and the mass transfer efficiency and operation stability of the electrolytic cell are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of electrochemical water treatment and resource recycling technology, and in particular to a plate electrolyzer device. Background Technology

[0002] Plate electrolyzers are core equipment in the fields of electrochemical water treatment and resource recovery. Their flow field distribution and mass transfer efficiency directly determine the electrolysis reaction efficiency, energy consumption, and treatment effect. The basic structure of a plate electrolyzer typically includes a tank body, an electrode assembly housed in the inner cavity of the tank, and an inlet and outlet connected to the inner cavity, respectively. The electrode assembly consists of multiple parallel and spaced electrode plates.

[0003] Existing plate electrolyzers generally employ a quadrilateral cross-section with right angles at each corner. However, during the flow of wastewater along the channels between the electrode plates, when the fluid reaches the right-angled corners of the inner cavity, the right-angled structure hinders fluid deflection, causing eddies and stagnation, resulting in significant flow dead zones. The presence of these dead zones leads to slow wastewater turnover, increased ion concentration gradients, and a continuous decrease in the local reactant concentration on the electrode surface, resulting in concentration polarization and reduced current efficiency. Simultaneously, the prolonged wastewater residence time in the dead zones makes them prone to side reactions, scaling, and bubble accumulation, further deteriorating the flow field distribution. Ultimately, this results in low effective reaction utilization, poor mass transfer efficiency, high energy consumption, and unstable treatment performance.

[0004] To address these issues, existing technologies have attempted to improve flow field distribution by altering the inlet method or adding baffles. However, these solutions are often structurally complex, costly to modify, and cannot fundamentally eliminate the flow dead zones at right-angled corners. Furthermore, some solutions, while eliminating dead zones, may introduce new turbulence or localized pressure drops, thereby affecting flow field stability.

[0005] Therefore, there is an urgent need for a plate electrolytic cell device that can structurally eliminate flow dead zones at the right-angled corners of the internal cavity and improve the uniformity of the flow field distribution.

[0006] The above background information is provided only to aid in understanding the concept and technical solution of this invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0007] The purpose of this invention is to provide a plate electrolytic cell device to solve the problems existing in the prior art, which can eliminate the flow dead zone at the right-angle corners of the inner cavity and improve the uniformity of the flow field distribution.

[0008] To achieve the above objectives, the present invention provides the following solution: A plate electrolytic cell apparatus, comprising: A tank having an inner cavity with a quadrilateral cross-section; An electrode assembly, disposed in the inner cavity, comprises multiple parallel and spaced electrode plates; A water inlet is provided on the tank body and communicates with the inner cavity; A water outlet is provided on the tank body and communicates with the inner cavity; A flow-disrupting structure is provided on the side wall of the inner cavity. The flow-disrupting structure is used to guide the fluid to flow along the wall of the inner cavity and break the flow dead zone.

[0009] In an exemplary embodiment, the inner cavity has an upper sidewall, a lower sidewall, a front sidewall, and a rear sidewall; the water inlet is located at the bottom of the front sidewall, and the water outlet is located at the upper part of the rear sidewall; the turbulence-inducing structure includes: The first arc-shaped lifting platform is disposed on the lower side wall and located downstream of the water flow direction of the inlet, with the arc-shaped concave surface of the first arc-shaped lifting platform facing the front side wall; The second arc-shaped lifting platform is disposed on the rear side wall and located below the water outlet, with the arc-shaped concave surface of the second arc-shaped lifting platform facing the lower side wall; The third arc-shaped lifting platform is located at the angle between the upper sidewall and the front sidewall, and has a rounded chamfer structure. The fourth arc-shaped lifting platform is disposed on the front side wall, located above the water inlet, with the arc-shaped concave surface of the fourth arc-shaped lifting platform facing the upper side wall.

[0010] In an exemplary embodiment, the first arc-shaped lifting platform is disposed on the lower sidewall and protrudes upward, for guiding the water jet to the bottom of the electrode assembly and flowing upward along the flow channel between the electrode plates; The second arc-shaped lifting platform is disposed on the rear side wall and protrudes forward, located below the water outlet, and is used to guide the fluid flowing to the water outlet back to the inner cavity; The third arc-shaped lifting platform is located at the angle between the upper sidewall and the front sidewall, and is used to guide the fluid to smoothly change direction at the top of the inner cavity; The fourth arc-shaped lifting platform is disposed on the front side wall and protrudes backward, located above the water inlet, and is used to block the direct collision between the water jet and the return fluid.

[0011] In one exemplary embodiment, the lifting angles of the first, second, and fourth arc-shaped lifting platforms are 15° to 45°; the radius of the rounded corner of the rounded chamfer structure of the third arc-shaped lifting platform is 1 / 8 to 1 / 5 of the length of the short side of the inner cavity; the first, second, third, and fourth arc-shaped lifting platforms are staggered in the circumferential direction of the inner cavity.

[0012] In an exemplary embodiment, the electrode sheet has conductive holes and insulating holes. The conductive holes are used for a conductive connector to pass through and contact the electrode sheet to achieve an electrical connection. The diameter of the insulating holes is larger than the outer diameter of the conductive connector, so as to maintain an insulating distance between the conductive connector and the electrode sheet when the conductive connector passes through.

[0013] In an exemplary embodiment, the conductive holes and the insulating holes are arranged in an alternating array; the conductive connector is a conductive screw, which includes an anode conductive screw and a cathode conductive screw; the anode conductive screw contacts and conducts electricity with the anode electrode when passing through the conductive holes of each electrode sheet, and is insulated from the cathode electrode sheet when passing through the insulating holes of each electrode sheet; the cathode conductive screw contacts and conducts electricity with the cathode electrode sheet when passing through the conductive holes of each electrode sheet, and is insulated from the anode electrode sheet when passing through the insulating holes of each electrode sheet.

[0014] In an exemplary embodiment, an insulating pad is provided between the electrode plates, and the insulating pad is sleeved on the conductive connector to isolate adjacent electrode plates and protect the electrode surface.

[0015] In an exemplary embodiment, a pressurization structure is provided at the water inlet, the pressurization structure including a water inlet pressurization chamber and a pressurization plate; the water inlet pressurization chamber is connected to the water inlet, the pressurization plate is disposed at the outlet of the water inlet pressurization chamber, and the pressurization plate is provided with a plurality of water distribution holes for refining the water inlet into multiple jets.

[0016] In one exemplary embodiment, the diameter of the water distribution holes is 2 mm, the depth is 5 mm, the number of water distribution holes is 170, and the total volume of all the water distribution holes is 2670 mm². 3 The inlet has a diameter of 22mm, a depth of 30mm, and a volume of 11403mm³. 3 The ratio of the volume of the water inlet to the total volume of the water distribution holes is 4.27:1; the distance between the pressure plate and the water inlet is 5mm to 10mm; the water distribution holes are arranged in a honeycomb pattern on the pressure plate, and there are no water distribution holes in the central area of ​​the pressure plate.

[0017] In an exemplary embodiment, the electrode sheets are vertically arranged parallel to the left and right sidewalls of the inner cavity, and the spacing between the electrode sheets is uniform, forming multiple parallel flow channels; the electrode sheets are any one of boron-doped diamond electrodes, titanium-based electrodes, or stainless steel electrodes.

[0018] The present invention achieves the following technical effects compared to the prior art: By incorporating a flow-disrupting structure on the sidewalls of the tank's internal cavity, the fluid is guided to smoothly change direction along the wall when reaching the corner areas of the cavity. This avoids eddies and stagnation caused by right-angle obstructions, fundamentally eliminating the inherent dead zone problem of the quadrilateral internal cavity's right-angled structure. With the dead zone eliminated, all areas of the electrode surface receive sufficient reactant renewal, concentration polarization is suppressed, and current efficiency is improved. Simultaneously, side reactions, scaling, and bubble accumulation are reduced, increasing equipment operational stability and electrode lifespan. This flow-disrupting structure is fixed, requiring no external power and adding no additional energy consumption. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the plate electrolytic cell device disclosed in a specific embodiment of the present invention; Figure 2 for Figure 1 A structural diagram from another perspective; Figure 3 for Figure 1 A sectional view; Figure 4 for Figure 3 Schematic diagram of the middle electrode assembly; Figure 5 for Figure 4 Schematic diagram of the structure of the anode electrode plate; Figure 6 for Figure 4 Schematic diagram of the structure of the cathode electrode plate; Figure 7 for Figure 3 Schematic diagram of the structure of the booster plate; Figure 8 for Figure 1 The flow field simulation trace diagram of the electrolytic cell device shown is shown under the condition of a water inlet velocity of 10 m / s. Figure 9 for Figure 8Steady-state velocity vector distribution diagram; The components are as follows: 1. Tank body; 2. Electrode assembly; 4. Inlet; 5. Outlet; 6. Upper side wall; 7. Lower side wall; 8. Front side wall; 9. Rear side wall; 10. First arc-shaped lifting platform; 11. Second arc-shaped lifting platform; 12. Third arc-shaped lifting platform; 13. Fourth arc-shaped lifting platform; 14. Conductive hole; 15. Insulating hole; 16. Anode conductive screw; 17. Cathode conductive screw; 18. Insulating gasket; 19. Water inlet pressurization chamber; 20. Pressurization plate; 21. Water distribution hole; 22. Anode electrode plate; 23. Cathode electrode plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. 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] The purpose of this invention is to provide a plate-type electrolytic cell device to solve the problems existing in the prior art, which can eliminate the flow dead zone at the right-angle corners of the inner cavity and improve the uniformity of the flow field distribution.

[0023] To make the above-mentioned objects, features and advantages of the present invention more readily understood, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Please refer to Figures 1 to 9 This embodiment provides a plate electrolytic cell device, including a cell body 1. The cell body 1 is made of corrosion-resistant materials, such as engineering plastics like acrylic (PMMA), polypropylene (PP), or polyvinylidene fluoride (PVDF). The cell body 1 preferably employs a flange sealing structure, meaning that a flange is provided at the open end of the cell body 1, which is sealed to an end cover. A sealing gasket (such as a rubber gasket or a polytetrafluoroethylene gasket) is placed between the flanges and tightened with bolts to ensure good sealing performance of the cell body 1 under working pressure, preventing wastewater leakage. The cell body 1 has an inner cavity, which is quadrilateral in horizontal cross-section. An inlet 4 and an outlet 5 communicating with the inner cavity are provided on the cell body 1.

[0025] In this embodiment, the external dimensions of the tank 1 can be determined according to actual processing requirements. For example, the external dimensions are 300mm×200mm×150mm (length×width×height). However, this is only an illustrative example and should not be construed as a limitation of the present invention.

[0026] like Figure 3As shown, the inner cavity has an upper sidewall 6, a lower sidewall 7, a front sidewall 8, and a rear sidewall 9. The inlet 4 is located at the bottom of the front sidewall 8, and the outlet 5 is located at the top of the rear sidewall 9. The electrode assembly 2 is located in the inner cavity, with the electrode plates vertically arranged parallel to the left and right sidewalls of the inner cavity. The multiple electrode plates are evenly spaced to form multiple parallel flow channels.

[0027] A flow-disrupting structure is provided on the side wall of the inner cavity. This flow-disrupting structure is used to guide the fluid to flow along the wall of the inner cavity and break the flow dead zone. Specifically, the flow-disrupting structure includes four arc-shaped lifting platforms, namely the first arc-shaped lifting platform 10, the second arc-shaped lifting platform 11, the third arc-shaped lifting platform 12, and the fourth arc-shaped lifting platform 13.

[0028] The first arc-shaped lifting platform 10 is disposed on the lower side wall 7, located downstream of the water flow direction of the inlet 4. The first arc-shaped lifting platform 10 protrudes upward from the surface of the lower side wall 7, with its arc-shaped concave surface facing the front side wall 8. The lifting angle of the first arc-shaped lifting platform 10 (i.e., the angle between the arc-shaped concave surface and the surface of the lower side wall 7) is 15° to 30°. The function of the first arc-shaped lifting platform 10 is that after the wastewater enters the inner cavity from the inlet 4, it is guided by the arc-shaped concave surface of the first arc-shaped lifting platform 10, changing from a horizontal jet to an upward flow, and uniformly entering the parallel flow channels between the electrode plates, avoiding excessively high local flow velocity and uneven scouring caused by the inlet water directly impacting the bottom of the electrode assembly 2.

[0029] The second arc-shaped lifting platform 11 is disposed on the rear side wall 9, located below the outlet 5. The second arc-shaped lifting platform 11 protrudes forward from the surface of the rear side wall 9, with its arc-shaped concave surface facing the lower side wall 7. The lifting angle of the second arc-shaped lifting platform 11 is 15° to 45°. The second arc-shaped lifting platform 11 is essentially a rising and falling slope structure, the function of which is: when wastewater flows out from the electrode group 2 and tends towards the outlet 5, the arc-shaped concave surface of the second arc-shaped lifting platform 11 forces the fluid flowing towards the outlet 5 to flow back to the lower part of the inner cavity, forming an up-and-down circulating flow, thereby significantly prolonging the effective residence time of wastewater in the tank, allowing the wastewater to participate more fully in the electrolysis reaction.

[0030] The third arc-shaped lifting platform 12 is located at the angle between the upper sidewall 6 and the front sidewall 8, and has a rounded chamfered structure. The radius of the rounded chamfer is 1 / 8 to 1 / 5 of the length of the shorter side of the inner cavity. The function of the third arc-shaped lifting platform 12 is that when the wastewater flows upward along the flow channel between the electrode plates to the top of the inner cavity, the arc surface of the third arc-shaped lifting platform 12 guides the fluid to smoothly change direction, so that the fluid smoothly transitions from upward flow to flow in the rearward direction, avoiding the obstruction of the right-angle structure to the fluid change direction, thereby eliminating eddies and energy loss at the top corner.

[0031] The fourth arc-shaped lifting platform 13 is disposed on the front sidewall 8, above the inlet 4. The fourth arc-shaped lifting platform 13 protrudes rearward from the surface of the front sidewall 8, with its arc-shaped concave surface facing the upper sidewall 6. The lifting angle of the fourth arc-shaped lifting platform 13 is 15° to 30°. The function of the fourth arc-shaped lifting platform 13 is to form a physical blockage in the upper middle part of the front sidewall 8, separating the incoming water jet from the fluid flowing back from the rear to the front, avoiding direct head-on collision between the two fluid streams, thereby suppressing local turbulence and pressure fluctuations, and maintaining a stable and orderly flow field.

[0032] The first arc-shaped lifting platform 10, the second arc-shaped lifting platform 11, the third arc-shaped lifting platform 12, and the fourth arc-shaped lifting platform 13 are staggered in the circumferential direction of the inner cavity, meaning that the four arc-shaped lifting platforms are not at the same horizontal height. This staggered arrangement allows the guiding effect of each arc-shaped lifting platform to be applied to the fluid alternately in space, avoiding the limitation that the fluid only turns in one plane when all the arc-shaped lifting platforms are at the same horizontal height, thus forming a three-dimensional circulating flow field from top to bottom and from front to back.

[0033] like Figure 3 and Figure 4 As shown, electrode assembly 2 is disposed within the inner cavity and includes multiple parallel, spaced-apart electrode sheets. The electrode sheets are vertically arranged parallel to the left and right sidewalls of the inner cavity, with uniform spacing between them, forming multiple layers of parallel flow channels. The material of the electrode sheets can be selected according to the application scenario; for example, boron-doped diamond (BDD) electrodes, titanium-based electrodes (such as titanium-based platinum-coated electrodes), or stainless steel electrodes can be used. In this embodiment, the electrode sheets are made of titanium-based platinum-coated plates with a thickness of 0.5 mm.

[0034] The electrode plates are fixed as follows: two corrosion-resistant conductive screws (such as titanium alloy screws or Hastelloy screws) pass through all the electrode plates. Both ends of the conductive screws extend out from the shell of the tank 1 and are locked with nuts, thus fixing and compressing the electrode assembly 2. This fixing method, using screws to pass through and stack the plates and lock them at both ends, is a mature existing technology for fixing electrode assemblies in the field of electrolytic cells. To prevent leakage at the screw exit points in the tank 1, a sealing ring (such as an O-ring) is provided between the screw and the shell; this sealing method is also a conventional technique in this field.

[0035] like Figures 4 to 6 As shown, each electrode sheet has two types of through holes: conductive holes 14 and insulating holes 15.

[0036] The inner diameter of the conductive hole 14 matches the outer diameter of the conductive connector (i.e., the conductive screw). When the conductive screw passes through the conductive hole 14, it directly contacts the electrode plate, thereby achieving an electrical connection. Specifically, the diameter of the conductive hole 14 is slightly larger than or equal to the outer diameter of the conductive screw to ensure a tight contact between the two and reduce contact resistance.

[0037] The diameter of the insulating hole 15 is larger than the outer diameter of the conductive screw. When the conductive screw passes through the insulating hole 15, a gap remains between the conductive screw and the hole wall of the electrode plate. The electrode plate and the conductive screw are in an insulating state and do not form an electrical connection. In this embodiment, the conductive screw is a copper or silver-plated helical spring pin with an outer diameter of 6~12mm; the diameter of the insulating hole 15 is 10~15mm, and the diameter of the conductive hole 14 is 6.5~12.5mm.

[0038] Conductive holes 14 and insulating holes 15 are arranged in an alternating array on the electrode sheet, for example, in an alternating rectangular array. The center distance between the conductive holes 14 and the insulating holes 15 is 70mm to 75mm. The electrode sheet size is 100mm × 100mm. This spacing avoids the holes being located at the electrode edge, preventing stress concentration and breakage at the electrode edge opening, and also avoids the problem of excessively high local current density at the electrode edge. The conductive holes 14 of each electrode sheet are aligned with the insulating holes 15 of the opposite electrode sheet. After the conductive screw is installed, it can achieve same-pole contact conduction and opposite-pole insulation isolation. At the same time, the conductive and insulating points are evenly distributed on the electrode plate surface, balancing the current density on the electrode surface and preventing local current accumulation that could cause electrode overheating and differential corrosion.

[0039] Based on the dual-hole design of the electrode sheet described above, this embodiment uses two conductive screws to achieve grouped conductivity of the anode and cathode: When the anode conductive screw 16 passes through each electrode plate, it makes contact with the anode electrode plate 22 and conducts electricity when it passes through the conductive hole 14 of the anode electrode plate 22; when it passes through the insulating hole 15 of the cathode electrode plate 23, it maintains an insulating distance from the cathode electrode plate 23 and does not form an electrical connection.

[0040] When the cathode conductive screw 17 passes through each electrode plate, it makes contact with the cathode electrode plate 23 and conducts electricity when it passes through the conductive hole 14 of the cathode electrode plate 23; when it passes through the insulating hole 15 of the anode electrode plate 22, it maintains an insulating distance from the anode electrode plate 22 and does not form an electrical connection.

[0041] Thus, the anode conductive screw 16 is electrically connected only to all anode electrode plates 22, and the cathode conductive screw 17 is electrically connected only to all cathode electrode plates 23, achieving independent group power supply for the anode and cathode. One end of each conductive screw extends out of the housing of the tank 1, allowing connection to the positive and negative terminals of an external DC power supply, respectively. This grouped conductive method structurally eliminates stray currents and short-circuit risks.

[0042] like Figure 4 As shown, an insulating gasket 18 is provided between adjacent electrode plates. The insulating gasket 18 is sleeved on the conductive screw and located between two adjacent electrode plates. The thickness of the insulating gasket 18 is 0.5 mm to 2 mm, and the material is preferably a corrosion-resistant insulating material such as polytetrafluoroethylene (PTFE) or polyvinylidene fluoride (PVDF).

[0043] The insulating gasket 18 serves two purposes: firstly, it spatially separates adjacent electrode plates, preventing short circuits caused by contact; secondly, during the tightening of the nuts at both ends of the conductive screw, the insulating gasket 18 shares and transmits the tightening pressure, preventing deformation, coating peeling, or localized damage to the electrode plates caused by the tightening force acting directly on their surfaces, thus effectively protecting the electrode surfaces. Simultaneously, the insulating gasket 18 also provides some buffering and sealing assistance.

[0044] like Figure 3 As shown, a pressurization structure is installed at four water inlets. The pressurization structure includes a water inlet pressurization chamber 19 and a pressurization plate 20.

[0045] The water inlet booster chamber 19 is connected to the water inlet 4 and is located between the water inlet 4 and the inner cavity. In this embodiment, a cylindrical chamber, namely the water inlet booster chamber 19, is formed inside the water inlet 4. Its diameter is 22 mm, its depth is 30 mm, and its calculated volume is approximately 11403 mm². 3 Wastewater first enters the inlet pressurization chamber 19, where the flow velocity decreases and the pressure increases, forming a pressure-stabilized jet, thus preventing the inlet water from directly impacting the electrode surface.

[0046] The booster plate 20 is located at the outlet of the inlet booster chamber 19, that is, the booster plate 20 is located downstream of the inlet 4. Figure 7 As shown, the booster plate 20 is a rectangular flat plate structure, and its size matches the width of the inner cavity of the tank 1. The booster plate 20 has multiple water distribution holes 21, which are used to refine the incoming wastewater into multiple jets before spraying it out.

[0047] In this embodiment, the diameter of the water distribution holes 21 is 2 mm, the depth is 5 mm, and there are 170 water distribution holes 21. The total volume of all water distribution holes 21 is approximately 2670 mm². 3 The volume of the inlet pressurization chamber 19 is 11403 mm³. 3 The total volume of the water distribution hole 21 is 2670mm. 3 The ratio of 1 to 2 is approximately 4.27:1, which results in a volumetric compression ratio of about 4 to 5 times, thus producing a significant pressurization effect when wastewater is ejected from the inlet pressurization chamber 19 through the water distribution hole 21.

[0048] The water distribution holes 21 are preferably arranged in a honeycomb pattern on the pressure plate 20. More specifically, the water distribution holes 21 adopt a "dense around the perimeter and sparse in the center" arrangement, that is, no water distribution holes 21 are provided in the central area of ​​the pressure plate 20, forming a square blank area, while the water distribution holes 21 are densely arranged around the central blank area. This arrangement avoids the formation of concentrated jets of fluid in the central area of ​​the pressure plate 20, and achieves a more uniform water distribution effect—after the wastewater flows in from the back of the pressure plate 20, it is refined by the water distribution holes 21 and sprayed out uniformly in the form of multiple high-speed jets, forming a uniformly distributed scouring flow field at the bottom of the electrode assembly 2.

[0049] The working process and flow field principle of this device are described in detail below, based on the above structure.

[0050] Please refer to Figure 8 and Figure 9 Wastewater first enters the inlet pressurization chamber 19 through inlet 4. Inside the inlet pressurization chamber 19, the wastewater flow velocity decreases and the pressure increases, forming a stable pressure-stabilized jet. Subsequently, the wastewater is refined into multiple high-speed jets through the 170 water distribution holes 21 on the pressurization plate 20, and uniformly sprayed to the bottom area of ​​the electrode assembly 2. Due to the compression ratio of approximately 4.27:1 between the volume of inlet 4 and the total volume of water distribution holes 21, the wastewater achieves a significant acceleration effect when ejected through the water distribution holes 21, forming a jet with high kinetic energy.

[0051] After the high-speed jet reaches the bottom of electrode assembly 2, it encounters a first arc-shaped lifting platform 10 located on the lower sidewall 7. The concave surface of the first arc-shaped lifting platform 10 faces the front sidewall 8, guiding the originally horizontal jet upwards, allowing the wastewater to uniformly enter the parallel flow channels between the electrode plates. Guided by the first arc-shaped lifting platform 10, the wastewater flows upwards along the flow channels between the electrode plates, forming a stable scouring flow field on the electrode surface. The continuous scouring of the electrode surface by the high-speed jet effectively thins the fluid boundary layer, accelerates the diffusion rate of reactants to the electrode surface, frees the electrolysis reaction from the limitations of mass transfer control, and significantly improves the mass transfer efficiency.

[0052] After flowing upwards along the flow channels between the electrode plates to the top of the inner cavity, the wastewater encounters a third arc-shaped lifting platform 12 located at the angle between the upper sidewall 6 and the front sidewall 8. The third arc-shaped lifting platform 12 has a rounded chamfered structure, and its arc surface guides the fluid to smoothly change direction, allowing the fluid to smoothly transition from upward flow to rearward flow. Due to the guiding effect of the arc-shaped lifting platform 12, the wastewater will not form eddies or stagnation in the top corner area, eliminating the flow dead zone commonly found in traditional right-angle structures in this region.

[0053] The wastewater flows backward and to the rear, where it encounters a second arc-shaped lifting platform 11 located on the rear sidewall 9. This platform is situated below the outlet 5, with its concave arc facing the lower sidewall 7. As the wastewater tends to exit from the outlet 5, the concave arc of the platform forces the fluid flowing towards it back into the lower part of the inner cavity, rather than discharging it directly. This backflow guidance creates a vertical circulation within the tank, significantly extending the effective residence time of the wastewater and allowing it to participate more fully in the electrolysis reaction, thus improving the treatment efficiency per unit volume of wastewater.

[0054] During the wastewater circulation process, the fourth arc-shaped lifting platform 13, located on the front sidewall 8, plays a crucial role in stabilizing the flow. The fourth arc-shaped lifting platform 13 is situated above the inlet 4, with its concave arc facing the upper sidewall 6. When the fluid returning from the rear flows towards the front, the fourth arc-shaped lifting platform 13 physically prevents the return fluid from directly colliding with the bottom inlet jet. The two fluid streams are guided and redirected at the fourth arc-shaped lifting platform 13, preventing direct collision and thus avoiding local turbulence and pressure fluctuations, maintaining a stable and orderly flow field throughout the entire cavity.

[0055] The staggered distribution of four arc-shaped lifting platforms in the circumferential direction of the inner cavity allows the guiding effect of each platform to be applied to the fluid alternately in space—the first arc-shaped lifting platform 10 guides upward flow at the bottom, the third arc-shaped lifting platform 12 guides deflection at the top, the second arc-shaped lifting platform 11 guides backflow at the rear, and the fourth arc-shaped lifting platform 13 blocks counterflow at the front—forming a complete three-dimensional circulating flow field from top to bottom and from front to back. In this circulating flow field, wastewater flows through all channels of the entire electrode assembly 2, and all areas of the electrode surface can be fully refreshed by wastewater. There are no large areas of low-velocity stagnation zones, and the velocity vector distribution is uniform.

[0056] While the wastewater flows, an external DC power supply powers the electrode assembly 2 via the anode conductive screw 16 and the cathode conductive screw 17. The anode conductive screw 16 conducts electricity through contact with the anode electrode plate 22 via the conductive hole 14, and is insulated from the cathode electrode plate 23 via the insulating hole 15. Similarly, the cathode conductive screw 17 conducts electricity through contact with the cathode electrode plate 23 via the conductive hole 14, and is insulated from the anode electrode plate 22 via the insulating hole 15. An insulating gasket 18 further ensures electrical insulation and mechanical protection between adjacent electrode plates. Under the influence of the electric field, the target substances in the wastewater undergo an electrochemical reaction on the electrode surface, achieving the purpose of water treatment or resource recovery.

[0057] After multiple cycles and thorough reactions within the tank, the wastewater is finally discharged from outlet 5.

[0058] In a preferred embodiment, the lifting angles of the first arc-shaped lifting platform 10, the second arc-shaped lifting platform 11, and the fourth arc-shaped lifting platform 13 are between 15° and 45°. Within this angle range, the arc-shaped lifting platforms can effectively guide the fluid direction without causing excessive local pressure drop. The radius of the arc angle of the third arc-shaped lifting platform 12 is 1 / 8 to 1 / 5 of the length of the short side of the inner cavity. This ratio range has been verified by flow field simulation to achieve a good balance between eliminating dead zones and maintaining effective reaction volume. The distance between the pressure booster plate 20 and the inlet 4 is 5mm to 10mm. This distance provides sufficient space for jet diffusion, ensuring that multiple jets form a uniform coverage area when they reach the bottom of the electrode assembly 2.

[0059] Regarding the electrode material, in addition to the titanium-based platinum-coated plate used in the above embodiments, boron-doped diamond (BDD) electrodes or stainless steel electrodes can also be selected depending on the specific application scenario. The surface of the electrode can be modified as needed, such as by coating the surface with a catalyst or adding microstructures. These are all conventional choices that can be made by those skilled in the art based on actual needs.

[0060] Regarding the sealing method of tank 1, in addition to the flange seal mentioned above, welding seals or threaded seals can also be used, as long as it can ensure that the tank does not leak under working pressure. Regarding the seal between the conductive screw and the housing, conventional sealing methods in this field, such as O-ring seals, packing seals, or mechanical seals, can be used.

[0061] Through the above structure and its synergistic effect, the present invention achieves the following technical effects: First, by setting the first to fourth arc-shaped lifting platforms on the inner cavity sidewall, a complete flow guiding system covering the entire process of water intake, flow, turning, and reflux is formed, fundamentally eliminating the dead zone problem at the corners inherent in the right-angled structure of the quadrilateral inner cavity. The elimination of the dead zone allows all areas of the electrode surface to obtain sufficient reactant renewal, concentration polarization is suppressed, and current efficiency is improved.

[0062] Secondly, through the backflow guidance effect of the second arc-shaped lifting platform below the outlet, the wastewater forms an up-and-down circulation flow in the tank, significantly extending the effective residence time and improving the treatment efficiency of wastewater per unit volume. There is no need to increase the tank volume or reduce the flow rate to improve the treatment effect, thus improving the utilization rate of the tank space.

[0063] Third, the physical blocking of the inlet jet and the return fluid by the fourth arc-shaped lifting platform avoids direct head-on collision of the fluids, suppresses local turbulence and pressure fluctuations, significantly improves the stability of the flow field, and ensures uniform scouring of the electrode surface, thus avoiding problems such as local scouring corrosion and insufficient local mass transfer.

[0064] Fourth, through the upward guidance of the bottom inlet water by the first arc-shaped lifting platform and the smooth deflection of the top fluid by the arc angle of the third arc-shaped lifting platform, the wastewater is guided in an orderly manner throughout the entire flow path, without right-angle obstruction or sudden deflection, resulting in low hydraulic energy loss and an orderly and stable flow field.

[0065] Fifth, by combining the conductive and insulating holes of the electrode sheet with the grouped conduction design of the dual conductive screws, the conductive and insulating functions on a single electrode sheet are integrated into one. The anode and cathode can be grouped for power supply without the need for additional insulation kits, eliminating stray current and short circuit risks, simplifying the assembly process and improving insulation reliability.

[0066] Sixth, by setting insulating pads, electrical insulation is ensured while protecting the electrode surface from assembly compression damage, thereby improving the stability and service life of the electrode stack.

[0067] Seventh, through the coordinated design of the water inlet pressurization chamber and the pressurization plate, the compression ratio between the water inlet volume and the total volume of the water distribution hole is used to generate a pressurized jet. The high-speed jet continuously scours the electrode surface, effectively thinning the boundary layer, accelerating the mass transfer rate, freeing the electrolysis reaction from mass transfer control, and improving current efficiency.

[0068] In the description of this invention, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention, and do not imply or require that the device or element referred to have a specific orientation or construction method, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish the objects of description and should not be construed as limiting importance or order, and the features defined by such terms may explicitly or implicitly include one or more of those features. Unless otherwise stated, "a plurality of" in the description of this invention refers to two or more.

[0069] The terms "installation," "connection," and "joining" should be interpreted broadly, unless otherwise explicitly defined, to include, but are not limited to, fixed connections, detachable connections, or integrally formed connections; mechanical or electrical connections; direct connections or indirect connections via an intermediate medium; and internal communication between two components. Those skilled in the art can understand their meaning based on the specific technical solution. The fixed connections involved in this invention, unless otherwise stated, include both detachable fixed connections (such as bolt and screw connections) and non-detachable fixed connections (such as riveting and welding), and may also include integral structures achieved through an integral forming process (such as casting) (except where integral forming is clearly impossible).

[0070] Unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes cover states or shapes that are similar to, close to, or adjacent to them.

[0071] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured using a one-piece molding process.

[0072] It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0073] In the embodiments of this application, the same reference numerals are used to denote the same component or part.

[0074] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0075] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A plate-type electrolytic cell device, characterized in that, include: The tank (1) has an inner cavity with a quadrilateral cross-section; Electrode assembly (2) is disposed in the inner cavity and includes multiple parallel and spaced electrode plates; The water inlet (4) is provided on the tank (1) and communicates with the inner cavity; The water outlet (5) is provided on the tank (1) and communicates with the inner cavity; A flow-disrupting structure is provided on the side wall of the inner cavity. The flow-disrupting structure is used to guide the fluid to flow along the wall of the inner cavity and break the flow dead zone.

2. The plate electrolytic cell apparatus according to claim 1, characterized in that: The inner cavity has an upper sidewall (6), a lower sidewall (7), a front sidewall (8), and a rear sidewall (9). The inlet (4) is located at the bottom of the front sidewall (8), and the outlet (5) is located at the upper part of the rear sidewall (9). The turbulence structure includes: The first arc-shaped lifting platform (10) is set on the lower side wall (7) and is located downstream of the water flow direction of the inlet (4). The arc-shaped concave surface of the first arc-shaped lifting platform (10) faces the front side wall (8). The second arc-shaped lifting platform (11) is disposed on the rear side wall (9) and located below the water outlet (5). The arc-shaped concave surface of the second arc-shaped lifting platform (11) faces the lower side wall (7). The third arc-shaped lifting platform (12) is located at the angle between the upper side wall (6) and the front side wall (8), and has a rounded chamfer structure; The fourth arc-shaped lifting platform (13) is set on the front side wall (8) and located above the water inlet (4). The arc-shaped concave surface of the fourth arc-shaped lifting platform (13) faces the upper side wall (6).

3. The plate electrolytic cell apparatus according to claim 2, characterized in that: The first arc-shaped lifting platform (10) is disposed on the lower side wall (7) and protrudes upward, for guiding the water jet to the bottom of the electrode group (2) and flowing upward along the flow channel between the electrode plates; The second arc-shaped lifting platform (11) is disposed on the rear side wall (9) and protrudes forward, located below the water outlet (5), and is used to guide the fluid flowing to the water outlet (5) back to the inner cavity; The third arc-shaped lifting platform (12) is located at the angle between the upper sidewall (6) and the front sidewall (8) to guide the fluid to smoothly turn at the top of the inner cavity; The fourth arc-shaped lifting platform (13) is set on the front side wall (8) and protrudes backward, located above the water inlet (4), and is used to block the direct collision between the water jet and the return fluid.

4. The plate electrolytic cell apparatus according to claim 2, characterized in that: The lifting angles of the first arc-shaped lifting platform (10), the second arc-shaped lifting platform (11), and the fourth arc-shaped lifting platform (13) are 15° to 45°; the radius of the rounded corner of the rounded chamfer structure of the third arc-shaped lifting platform (12) is 1 / 8 to 1 / 5 of the length of the short side of the inner cavity; the first arc-shaped lifting platform (10), the second arc-shaped lifting platform (11), the third arc-shaped lifting platform (12), and the fourth arc-shaped lifting platform (13) are staggered in the circumferential direction of the inner cavity.

5. The plate electrolytic cell apparatus according to claim 1, characterized in that: The electrode sheet has a conductive hole (14) and an insulating hole (15). The conductive hole (14) is used for the conductive connector to pass through and contact the electrode sheet to achieve electrical connection. The diameter of the insulating hole (15) is larger than the outer diameter of the conductive connector, so as to keep the conductive connector at an insulating distance from the electrode sheet when it passes through.

6. The plate electrolytic cell apparatus according to claim 5, characterized in that: The conductive holes (14) and the insulating holes (15) are arranged in an alternating array; the conductive connector is a conductive screw, which includes an anode conductive screw (16) and a cathode conductive screw (17); when the anode conductive screw (16) passes through the conductive holes (14) of each electrode sheet, it contacts and conducts electricity with the anode electrode sheet (22), and when it passes through the insulating holes (15) of each electrode sheet, it is insulated from the cathode electrode sheet (23); when the cathode conductive screw (17) passes through the conductive holes (14) of each electrode sheet, it contacts and conducts electricity with the cathode electrode sheet (23), and when it passes through the insulating holes (15) of each electrode sheet, it is insulated from the anode electrode sheet (22).

7. The plate electrolytic cell apparatus according to claim 5, characterized in that: An insulating pad (18) is provided between the electrode plates. The insulating pad (18) is sleeved on the conductive connector to isolate the adjacent electrode plates and protect the electrode surface.

8. The plate electrolytic cell apparatus according to claim 1, characterized in that: A pressurization structure is provided at the water inlet (4). The pressurization structure includes a water inlet pressurization chamber (19) and a pressurization plate (20). The water inlet pressurization chamber (19) is connected to the water inlet (4). The pressurization plate (20) is located at the outlet of the water inlet pressurization chamber (19). The pressurization plate (20) has multiple water distribution holes (21) for refining the incoming water into multiple jets.

9. The plate electrolytic cell apparatus according to claim 8, characterized in that: The water distribution holes (21) have a diameter of 2 mm and a depth of 5 mm. There are 170 water distribution holes (21) in total, and the total volume of all water distribution holes (21) is 2670 mm². 3 The inlet (4) has a diameter of 22 mm, a depth of 30 mm, and a volume of 11403 mm³. 3 The ratio of the volume of the inlet (4) to the total volume of the water distribution holes (21) is 4.27:1; the distance between the pressure plate (20) and the inlet (4) is 5mm to 10mm; the water distribution holes (21) are arranged in a honeycomb pattern on the pressure plate (20), and there are no water distribution holes (21) in the central area of ​​the pressure plate (20).

10. The plate electrolytic cell apparatus according to claim 1, characterized in that: The electrode plates are vertically arranged parallel to the left and right sidewalls of the inner cavity, and the spacing between the electrode plates is uniform, forming multiple parallel flow channels; the electrode plates are any one of boron-doped diamond electrodes, titanium-based electrodes, or stainless steel electrodes.

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