An ozone homogeneous catalytic oxidation equipment for deep sewage treatment

Abstract

The present invention belongs to the technical field of industrial wastewater treatment, and specifically discloses an ozone homogeneous catalytic oxidation device for deep wastewater treatment, comprising: a catalytic tank, a water guide cavity formed therein, the water guide cavity being used to transport water to be treated; a catalytic electrode group, arranged in the water guide cavity; the catalytic electrode group comprising a first catalytic plate and a second catalytic plate, the first catalytic plate and the second catalytic plate being alternately arranged in a second direction in the water guide cavity, and a water guide gap being formed between the side wall of the first catalytic plate and the side wall of the second catalytic plate; a control unit, electrically connected to the first catalytic plate, the second catalytic plate and an external power supply, respectively, so as to release metal ions into the water to be treated when the water to be treated passes through the water guide gap; the control unit maintains a first uniformity of the water guide gap along a direction perpendicular to the second direction to maintain a second uniformity of the metal ions in the water to be treated; the device has the following advantages: improving ozone utilization rate and oxidation intensity, uniformly releasing metal ions, and enhancing catalytic efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial wastewater treatment, and in particular to ozone homogeneous catalytic oxidation equipment for deep wastewater treatment. Background Art

[0002] Ozone, a highly effective oxidant with a standard redox potential second only to fluorine and the hydroxyl radical (OH), has been widely used in advanced wastewater treatment due to its strong oxidizing power, rapid reaction rate, ability to improve wastewater biodegradability, and the absence of sludge and secondary pollution during treatment. However, using ozone alone to treat wastewater still has significant shortcomings, primarily due to its limited solubility in water and its easy decomposition, resulting in low ozone utilization. Furthermore, the ozone molecule itself has limited oxidizing power, making it incapable of completely oxidizing many highly refractory organic pollutants, leading to unsatisfactory overall treatment results.

[0003] Therefore, an ozone homogeneous catalytic oxidation equipment for sewage deep treatment is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The present invention aims to provide an ozone homogeneous catalytic oxidation equipment for deep treatment of sewage, so as to solve or improve the above-mentioned technical problems of low utilization rate of ozone in sewage treatment and insufficient oxidation capacity for highly refractory organic matter.

[0005] In view of this, a first aspect of the present invention is to provide an ozone homogeneous catalytic oxidation equipment for deep treatment of sewage.

[0006] The first aspect of the present invention provides an ozone homogeneous catalytic oxidation equipment for deep treatment of sewage, comprising: a catalytic tank, wherein a water guide cavity is formed inside the catalytic tank along a first direction, and the water guide cavity is used to transport water to be treated; a catalytic electrode group, arranged in the water guide cavity; the catalytic electrode group includes a first catalytic plate and a second catalytic plate, the first catalytic plate and the second catalytic plate are alternately arranged in the water guide cavity along a second direction, and a water guide gap for the water to be treated to pass through is formed between the side wall of the first catalytic plate and the side wall of the second catalytic plate; a control unit, electrically connected to the first catalytic plate, the second catalytic plate and an external power supply, respectively, to release metal ions into the water to be treated when the water to be treated passes through the water guide gap; when the first catalytic plate or the second catalytic plate is energized to consume and generate the metal ions, the control unit maintains a first uniformity of the water guide gap along a direction perpendicular to the second direction and maintains a second uniformity of the metal ions in the water to be treated by regulating the energization state of the first catalytic plate or the second catalytic plate.

[0007] In any of the above technical solutions, a plurality of the first catalytic plates and a plurality of the second catalytic plates are respectively provided, and the ozone homogeneous catalytic oxidation equipment for deep sewage treatment further includes: at least a plurality of conductive connecting columns, and each of the conductive connecting columns extends along the second direction; the conductive connecting columns are connected to all the first catalytic plates and the second catalytic plates.

[0008] In any of the above technical solutions, the control unit includes a first bus bar and a second bus bar extending into the water guide cavity along the first direction respectively; the first bus bar is electrically connected to all first catalytic plates through the conductive connecting column; the second bus bar is electrically connected to all second catalytic plates through the conductive connecting column.

[0009] In any of the above technical solutions, the ozone homogeneous catalytic oxidation equipment for deep treatment of sewage also includes an insulating kit; each conductive connecting column connected to the first bus bar is connected to all second catalytic plates through the insulating kit; and / or each conductive connecting column connected to the second bus bar is connected to all first catalytic plates through the insulating kit.

[0010] In any of the above technical solutions, the control unit includes a controller, which is electrically connected to the first bus bar and the second bus bar respectively; the controller adjusts the positive pole of the power supply to connect to the first bus bar or the second bus bar to switch the first catalytic plate and the second catalytic plate to alternately produce the metal ions.

[0011] In any of the above technical solutions, the controller switches the first catalytic plate or the second catalytic plate to generate the metal ions in a cycle, and the length of the cycle is negatively correlated with the width of the water-conducting gap along the second direction.

[0012] In any of the above technical solutions, the first bus terminal block is formed with at least one first extension edge at the end portion corresponding to the water guide cavity, and the second bus terminal block is formed with at least one second extension edge at the end portion corresponding to the water guide cavity; each of the conductive connecting columns is electrically connected to the first extension edge or the second extension edge through one end.

[0013] In any of the above technical solutions, the first extended edge corresponds to the middle of the first catalytic plate along the second direction, and / or the second extended edge corresponds to the edge of the second catalytic plate along the second direction.

[0014] In any of the above technical solutions, a fastening nut is screwed onto the conductive connecting column, and an elastic portion is provided at the end of the fastening nut; the fastening nut applies prestress to the first catalytic plate through the elastic portion so that the portion of the first catalytic plate corresponding to the conductive connecting column tends to approach the first extension edge; and / or the fastening nut applies prestress to the second catalytic plate through the elastic portion so that the portion of the second catalytic plate corresponding to the conductive connecting column tends to move away from the second extension edge.

[0015] In any of the above technical solutions, the ozone homogeneous catalytic oxidation equipment for deep sewage treatment also includes: a water distribution grid installed in the water guide cavity; the water distribution grid has guide holes arranged in an array, and the guide holes correspond to the water guide gaps along the first direction.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] By introducing a catalytic electrode assembly consisting of a first and second catalytic plates into the water-conducting gap and applying an electric field to the water as it flows, the metal ions are released synchronously, forming a synergistic homogeneous catalytic reaction pathway between ozone, metal ions, and pollutants. The introduction of metal ions effectively stimulates the decomposition of ozone into highly reactive species such as OH radicals, significantly increasing the reaction participation rate of ozone molecules, reducing their ineffective decomposition rate, and significantly improving ozone utilization.

[0018] The active intermediates formed by ozone under the catalysis of metal ions have a higher redox potential, which can break the stable chemical bonds in the molecules of various organic pollutants, achieve deep oxidation and thorough mineralization, make up for the lack of the original oxidation capacity of ozone molecules, and effectively expand the adaptability of equipment under complex water quality conditions.

[0019] By alternately arranging the first catalytic plate and the second catalytic plate in the water-conducting cavity along the second direction, a stable and uniform water-conducting gap structure is formed. Under the real-time voltage adjustment of the control unit, the water-conducting gap maintains a consistent geometric thickness perpendicular to the second direction, that is, it has good first uniformity, ensuring that the entire water cross-section is uniformly affected by the electric field.

[0020] The control unit achieves the quantitative release of metal ions in the water-conducting gap by precisely adjusting the power-on state of the first catalytic plate and the second catalytic plate, and maintains the consistency of their diffusion rate in the water body through the uniformity of the electric field, forming a stable second uniformity, that is, the concentration of metal ions in the water body to be treated is evenly distributed, thereby avoiding excessive or low local reaction intensity and improving the overall catalytic reaction efficiency.

[0021] Additional aspects and advantages of embodiments according to the present invention will become apparent in the following description or may be learned through practice of embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of a half-section structure of the present invention;

[0025] Figure 3 A bottom view of the present invention;

[0026] Figure 4 Schematic diagram of the catalytic electrode assembly and its connection structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the partial cross-section structure of the first catalytic plate and the second catalytic plate of the present invention.

[0028] in, Figure 1-Figure 5 The corresponding relationship between the reference numerals and component names is as follows:

[0029] 1 catalytic tank, 101 water guide cavity, 102 connecting flange, 2 catalytic electrode group, 201 first catalytic plate, 202 second catalytic plate, 3 water guide gap, 4 conductive connecting column, 5 first bus terminal bar, 501 first extension edge, 6 second bus terminal bar, 601 second extension edge, 7 fastening nut, 701 elastic part, 8 water distribution grid, 9 concave ring, 10 convex ring. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0032] See also Figure 1-Figure 5 , the following describes an ozone homogeneous catalytic oxidation equipment for deep treatment of sewage according to some embodiments of the present invention.

[0033] The embodiment of the first aspect of the present invention provides an ozone homogeneous catalytic oxidation equipment for deep treatment of sewage. In some embodiments of the present invention, such as Figure 1-Figure 5 As shown, the ozone homogeneous catalytic oxidation equipment includes:

[0034] The catalytic tank 1 has a water guide cavity 101 formed inside along a first direction. The water guide cavity 101 is used to transport the water to be treated. The first direction is the longitudinal direction, and the water guide cavity 101 transports the water to be treated from bottom to top.

[0035] The catalytic electrode group 2 is arranged in the water guide chamber 101; the catalytic electrode group 2 includes a first catalytic plate 201 and a second catalytic plate 202. The first catalytic plate 201 and the second catalytic plate 202 are alternately arranged along the second direction in the water guide chamber 101, and a water guide gap 3 for the water to be treated to pass through is formed between the side walls of the first catalytic plate 201 and the side walls of the second catalytic plate 202.

[0036] The control unit is electrically connected to the first catalytic plate 201, the second catalytic plate 202 and the external power supply, so as to release metal ions into the water to be treated when the water to be treated passes through the water-conducting gap 3. When the first catalytic plate 201 or the second catalytic plate 202 is energized to consume and generate metal ions, the control unit maintains a first uniformity of the water-conducting gap 3 along a second direction perpendicular to ensure that the water to be treated and the metal ions in the water-conducting gap 3 are in equal contact, and maintains a second uniformity of the metal ions in the water to be treated, so that after discharge, the concentration of the metal ions in the water to be treated is equal without adopting other mixing structures.

[0037] The present invention provides an ozone homogeneous catalytic oxidation equipment for deep treatment of sewage. A water guide chamber 101 is formed in the longitudinal direction inside the catalytic tank 1. The water guide chamber 101 constitutes the main channel for sewage flow and catalytic reaction in the equipment, and is used to guide and adjust the flow of the water to be treated entering the equipment, as well as to couple the reaction operation with the catalytic component. The formation of the water guide chamber 101 provides a complete and closed flow path inside the catalytic tank 1, providing a structural basis for the dissolution of metal ions, the distribution of the electric field, the stable transportation of water flow and the subsequent ozone reaction. The water guide chamber 101 is designed to flow from the bottom to the top, that is, the water to be treated enters from the bottom inlet of the water guide chamber 101 and flows upward in the vertical direction to the top outlet. This layout has significant advantages in fluid optimization and reaction efficiency improvement.

[0038] Specifically, the bottom-up flow path design first facilitates the formation of a stable upward flow of water in the electrode area, thereby enhancing the scouring effect of the water on the electrode surface, inhibiting the accumulation of sediment or bubbles between the electrode plates, preventing the shielding of active sites on the electrode surface, and effectively ensuring the continuous release of metal ions. This flow pattern also utilizes the buoyancy of the water flow itself to carry the gases formed in the electrode reaction upward and discharge, avoiding the problems of reduced reaction efficiency and increased electrode corrosion caused by gas accumulation.

[0039] During actual operation, the water flow carried by water-conducting cavity 101 is not only a transport medium but also serves as the spatial and temporal coordination of the metal ion-water-ozone ternary reaction system. As the water flows through the catalytic electrodes, it electrochemically dissolves the metal ions and maintains ion activity and uniform distribution throughout the entire upward transport process, providing a highly activated water environment for the subsequent ozone injection point. This helps ozone molecules in the contact area to be rapidly decomposed by the active metal ions to generate hydroxyl radicals, thereby achieving efficient deep oxidative degradation of difficult-to-degrade organic pollutants.

[0040] The catalytic electrode assembly 2 is installed in the water-conducting cavity 101 and serves as the core functional unit of the equipment, achieving metal ion release and forming the initial conditions for the catalytic reaction. The catalytic electrode assembly 2 is composed of a plurality of first catalytic plates 201 and second catalytic plates 202. Specifically, the first catalytic plates 201 and second catalytic plates 202 are alternately arranged in the water-conducting cavity 101 along a second direction, i.e., a transverse direction perpendicular to the upward flow direction of the treated water. This alternating arrangement not only ensures electric field balance within the catalytic electrode assembly 2 but also physically creates a regular and orderly water-conducting path, creating a stable environment for the coupling of metal ion release between the electrodes and water flow disturbances.

[0041] The sidewall spacing between the first catalytic plate 201 and the second catalytic plate 202 is configured to form a water-conducting gap 3. This water-conducting gap 3 extends throughout the entire height of the catalytic electrode assembly 2 along the direction of water flow, forming a channel for the water to be treated to pass from bottom to top through the catalytic electrode assembly 2. By properly controlling the width of the water-conducting gap 3, the smooth passage of water can be ensured while enhancing the shearing effect of the water flow on the electrode surface. This promotes the desorption of deposits on the electrode surface at the fluid dynamics level and maintains the efficient release of metal ions from the electrode.

[0042] In addition, the alternating first and second catalytic plates 201, 202 within the catalytic electrode group 2 are connected to different potential nodes via an external power supply system, forming a stable voltage difference during operation. Current enters the water body from the conductive end of one type of catalytic plate, and then conducts to the other type of catalytic plate through the electrolyte in the water body, completing a closed loop of electron flow. During this process, a metal oxidation reaction occurs on the surface of the catalytic plate connected to the positive electrode of the power supply, releasing soluble metal ions. These ions are transported along the water-conducting gap 3 to the outlet area of ​​the catalytic tank 1 under the support of the water flow, and then participate in the subsequent homogeneous catalytic oxidation reaction in the external ozone injection module.

[0043] It's worth emphasizing that the presence of the water-conducting gap 3 not only serves as a flow guide but also ensures, at a microscopic scale, the uniform expansion of the electric field within the electrode assembly and the full exposure of the ion release interface, preventing problems such as local concentration differences, non-uniform electrode corrosion, or reduced reaction efficiency caused by water short-circuiting or stagnant flow. Thanks to the complementary structure of the first catalytic plate 201 and the second catalytic plate 202 within the water-conducting cavity 101, the water-conducting gap 3 is continuously distributed in the longitudinal direction, ensuring that the entire water body receives sufficient electrochemical action as it flows through the catalytic electrode assembly 2, improving the concentration stability of released metal ions and ensuring the efficient generation of hydroxyl radicals in the subsequent oxidation reaction.

[0044] The control unit, serving as the equipment's core regulatory unit, is electrically connected to the first catalytic plate 201, the second catalytic plate 202, and an external power source. It provides real-time regulation and feedback control of the operating state of the catalytic electrode assembly 2, ensuring stability, balance, and reaction continuity throughout the catalytic release process. During operation, the treated water flows from bottom to top through the water-conducting cavity 101 to the catalytic electrode assembly 2. The control unit electrically connects the first catalytic plate 201 and the second catalytic plate 202, ensuring that as the water flows through the water-conducting gap 3 formed by the catalytic electrode assembly 2, an electrochemical reaction occurs on the electrode surface based on the voltage provided by the external power source, resulting in the stable release of metal ions into the treated water.

[0045] During the specific control process, the control unit regulates the power-on state of the first catalytic plate or the second catalytic plate, not only providing an on / off signal, but more importantly, by regulating the power-on state, including voltage magnitude, current intensity, and electrode polarity switching strategy, to enable the first catalytic plate 201 or the second catalytic plate 202 to participate in the reaction as the anode during different operating cycles, thereby achieving periodic alternating release of metal ions, thereby extending the service life of the electrode and suppressing the problem of uneven scaling or corrosion on the electrode surface. In particular, the control unit also has the ability to maintain a first uniformity of the water-conducting gap 3 in a second direction perpendicular to the direction. That is, the control unit ensures that the water-conducting gap 3 has a uniform shape and consistent size in the transverse direction through feedback regulation and a linkage control mechanism with the water flow distribution, thereby avoiding gap contraction, offset, or blockage caused by mechanical assembly errors, uneven electrode arrangement, or temperature difference stress, thereby ensuring that water can flow through each set of electrodes in the catalytic electrode group 2 in a uniformly distributed state.

[0046] By controlling the primary uniformity of the water-conducting gap 3, water achieves a stable, uniform flow between the electrode plates. This allows metal ions released from the electrode surfaces to be rapidly and evenly carried into the water, achieving efficient contact with the water throughout the entire water-conducting channel. The control unit further regulates the electrolysis reaction rate and electric field distribution to maintain a secondary uniformity of metal ions in the water. This ensures that the released metal ions maintain a balanced spatial distribution during longitudinal flow, preventing localized concentration or dilution.

[0047] Because this control method achieves a dynamic balance between the electric field, water flow, and ion diffusion before the water leaves the catalytic electrode assembly 2, a highly uniform metal ion concentration can be achieved in the water after it passes through the catalytic tank 1 and is discharged, without the need for additional mixers, flow disturbance structures, or secondary circulation devices. This not only significantly simplifies the structural complexity of the subsequent ozone contact reaction but also avoids fluctuations in ozone reaction efficiency caused by insufficient mixing, achieving an optimal balance between compactness and reaction consistency.

[0048] In summary, through the bottom-up flow design of the water-guiding cavity 101 in the catalytic tank 1 and the alternating arrangement structure of the catalytic electrode group 2, the release of metal ions in the process of homogeneous catalytic oxidation of ozone is highly coupled with the water transport, thereby improving the ozone utilization rate from the source and significantly enhancing the oxidation capacity of highly difficult-to-degrade organic pollutants; the water-guiding gap 3 maintains geometric consistency in the horizontal dimension and cooperates with the closed loop of the control unit in the vertical dimension to promote equal contact between the water to be treated and the metal ions, and the concentration of the water can be uniform without secondary mixing after the water is discharged, thereby stably outputting high-activity water and simplifying the subsequent process; the control unit adopts The pulse width modulation constant current strategy and periodic polarity switching logic balance the consumption rate of the two types of catalytic plates and inhibit scaling, significantly extending the service life of the electrode group. At the same time, real-time voltage and current feedback ensures that the release rate automatically adjusts with load fluctuations, maintaining high-efficiency and low-consumption operation of the entire machine; the combined action of staggered electrodes and fluid shear promptly discharges bubbles and suspended solids, prevents short circuit and blockage risks, and improves equipment safety and reliability; the overall structure is compact, reducing traditional mixers and external aeration devices, taking up little space, simplifying maintenance, and reducing operating energy consumption and reagent dosage simultaneously, effectively controlling the overall treatment cost.

[0049] Specifically, the catalyst tank 1 is square, and the bottom is connected to the external water supply channel through an integrally formed square connection flange 102 .

[0050] In any of the above embodiments, a plurality of first catalytic plates 201 and a plurality of second catalytic plates 202 are provided, and the ozone homogeneous catalytic oxidation equipment for advanced sewage treatment further includes:

[0051] At least a plurality of conductive connecting columns 4 are provided, and each conductive connecting column 4 extends along the second direction; the conductive connecting columns 4 are connected to all the first catalytic plates 201 and the second catalytic plates 202. By respectively interpenetrating and connecting all the first catalytic plates 201 and the second catalytic plates 202 with the conductive connecting columns 4, all the first catalytic plates 201 can serve as anodes or cathodes when separated from each other, or all the first catalytic plates 201 can serve as anodes or cathodes when separated from each other.

[0052] In this embodiment, multiple conductive connecting posts 4 arranged along the second direction form a longitudinal current trunk within the three-dimensional space. Each conductive connecting post 4 transversely intersects all first catalytic plates 201 and all second catalytic plates 202. A directional conductive clip, closely attached to the outer wall of the conductive connecting post 4, is positioned at the entry hole of each catalytic plate. The surface of the conductive clip is coated with a corrosion-resistant metal coating to ensure low-impedance surface contact between the conductive connecting post 4 and the catalytic plate. When a constant potential is applied by the control unit, this current loop ensures that all first catalytic plates 201 maintain a uniform electrical potential while maintaining physical separation. Similarly, all second catalytic plates 202 also maintain a different electrical potential, thereby enabling the two sets of catalytic plates to switch between operating as either a single anode or a single cathode.

[0053] High-insulation-strength ceramic gaskets are used for axial positioning between the conductive connecting column 4 and the catalytic plate. The gaskets have uniform thickness and are evenly distributed to ensure a constant series spacing between the catalytic plates. The uniform spacing helps to establish an approximately equidistant electric field gradient within the water-conducting gap 3, reduce single-point current-intensive areas, and guide the electric field lines to pass through the water to be treated in a parallel manner. Since the cross-sectional area of ​​the conductive connecting column 4 is much larger than the cross-sectional area of ​​the busbar weld of a single catalytic plate, the current has a low flow rate and a small pressure drop during longitudinal transmission, avoiding local temperature rise due to the ohmic heating effect, thereby suppressing random fluctuations in the metal ion release rate. Through the wiring method, the equipment can still maintain a constant metal ion concentration output during long-term operation, laying a stable initial condition for the subsequent homogeneous catalytic oxidation reaction.

[0054] Multiple conductive connecting posts 4 are evenly distributed on the catalytic plates in a symmetrical geometric relationship, forming a frame-type multi-trunk topology. The ring topology can form an equipotential loop between multiple conductive connecting posts 4. When the resistance of any conductive connecting post 4 increases or the contact becomes loose, the remaining connecting posts immediately share the current, avoiding local failure causing overall voltage deviation. When the device switches the polarity of the first catalytic plate 201 and the second catalytic plate 202, the control unit only needs to perform a polarity flip on the busbars at both ends of the conductive connecting post 4, and all catalytic plates immediately complete the anode-cathode exchange. The entire process does not require the removal or replacement of wires, achieving rapid polarity switching and periodic self-cleaning functions.

[0055] In any of the above embodiments, the control portion includes a first bus bar 5 and a second bus bar 6 respectively extending into the water guiding cavity 101 along the first direction.

[0056] The first bus bar 5 is electrically connected to all the first catalytic plates 201 through the conductive connecting pillars 4 for power transmission and achieving simultaneous metal ion release from all the first catalytic plates 201 .

[0057] The second bus bar 6 is electrically connected to all the second catalytic plates 202 via the conductive connecting pillars 4 for power transmission and achieving simultaneous metal ion release from all the second catalytic plates 202 .

[0058] In this embodiment, the control unit installs a first busbar 5 and a second busbar 6 extending parallel to a first direction on opposite sides of the water-conducting cavity 101. The first busbar 5 forms an equipotential connection with all first catalytic plates 201 via multiple conductive connecting posts 4. These connecting posts 4 pass through coaxial through-holes in each first catalytic plate 201 and utilize surface-mount soldering at the busbar. The soldering surface is continuous and low-impedance, enabling the longitudinal current entering the first busbar 5 to be quickly and evenly distributed to the conductive layers of all first catalytic plates 201. When the control unit applies an operating voltage to the first busbar 5, all first catalytic plates 201 simultaneously enter an electrochemically activated state and release metal ions. The metal ions diffuse within the water-conducting gap 3 along with the water flow. Thanks to the closed-loop voltage and current feedback provided by the control unit, the release rate remains consistent across all catalytic plates, thereby establishing a highly uniform metal ion field within the water-conducting gap 3.

[0059] The second busbar 6 forms a corresponding equipotential connection with all second catalytic plates 202 via another set of conductive connecting posts 4. An insulating spacer is placed between the first busbar 5 and the second busbar 6, maintaining a fixed spacing. Each current loop is independently closed to prevent cross-stage short circuits. The control unit is equipped with rapid polarity reversal logic to achieve periodic alternation between the first catalytic plate 201 and the second catalytic plate 202. This polarity reversal process causes the second catalytic plate 202 to enter the metal ion release phase while the first catalytic plate 201 transitions to the counter-polarity adsorption phase. This restores the catalytic surface potential to equilibrium and significantly extends the service life of the catalytic layer.

[0060] Both busbars utilize thick-walled copper alloy busbars coated with a titanium-iridium alloy. The conductor cross-sectional area is matched to the maximum design current, maintaining a temperature rise below three degrees Celsius under sustained high-load conditions. Double-sided silver-based solder is used between the busbars and the conductive connecting posts 4, creating a continuous, void-free weld seam that effectively suppresses contact loosening caused by electromagnetic vibration. The busbars are rigidly secured to the sidewalls of the water-conducting cavity 101 by polyetheretherketone (PEEK) composite reinforced fiber insulation brackets. These brackets possess high dielectric strength and low water absorption, ensuring that pressure differentials within and outside the water-conducting cavity 101 do not affect electrical safety.

[0061] In any of the above embodiments, the ozone homogeneous catalytic oxidation equipment for deep sewage treatment also includes an insulation kit.

[0062] Each conductive connecting column 4 connected to the first bus bar 5 is connected to all the second catalytic plates 202 through an insulating kit. The annular insulating kit is inserted through the through hole opened on the second catalytic plate 202 and then the conductive connecting column 4 is inserted to ensure that the first catalytic plate 201 is conductive while the second catalytic plate 202 is insulated.

[0063] Each conductive connecting column 4 connected to the second bus bar 6 is connected to all the first catalytic plates 201 through an insulating kit. The annular insulating kit is inserted through the through hole opened on the first catalytic plate and then the conductive connecting column 4 is inserted to ensure that the second catalytic plate 202 is conductive while the first catalytic plate 201 is insulated.

[0064] In this embodiment, the insulation sleeve forms an annular sleeve structure along the axis of the conductive connecting post 4 and forms a tight interference fit with the through-hole in the first direction. The main body of the insulation sleeve is made of a polyetheretherketone-based glass fiber reinforced high-dielectric strength composite material and sprayed with a microporous ceramic coating on the outer surface. The coating's porosity matches the water viscosity, forming a microscale hydrophilic permeable layer. This maintains electrical isolation even under high-velocity flushing conditions without reducing the water flow cross-section. Each conductive connecting post 4 connected to the first busbar 5 extends from the lateral side of the water-conducting cavity 101 through all through-holes of the second catalytic plates 202. An insulation sleeve is first installed at each through-hole location. A 20-micron axial clearance is maintained between the inner diameter of the insulation sleeve and the outer diameter of the conductive connecting post 4. After assembly, a self-expanding silicone rubber coating on the inner wall achieves zero-clearance fit, thus establishing a stable insulating interface. The conductive connecting post 4 then extends laterally into the corresponding first catalytic plate 201 and is sheathed in contact with the conductive layer of the first catalytic plate 201 through a thin layer of silver-copper brazing material, forming a low-impedance electrical path to ensure that all first catalytic plates 201 simultaneously receive the output potential of the first busbar 5. The assembly path of each conductive connecting post 4 connected to the second bus bar 6 completely mirrors the aforementioned process. The conductive connecting post 4 is first laterally isolated from all first catalytic plates 201 by an insulating sleeve and then partially connected to the second catalytic plate 202 to complete surface contact, thereby realizing an independent electrical channel between the second catalytic plate 202 and the second bus bar 6.

[0065] After the first busbar 5 and the second busbar 6 are routed through the insulation kit and the conductive connecting post 4, they form two completely independent and symmetrical current loops in three-dimensional space. These independent current loops achieve millivolt-level potential error tuning under real-time potential monitoring by the control unit and feedback control from a constant current source, ensuring that all first catalytic plates 201 and all second catalytic plates 202 are maintained at stable potential levels. The high dielectric strength of the insulation kit provides an eightfold safety margin at the maximum design operating voltage. Furthermore, the insulation kit also incorporates a network of embedded thermistors that monitor the circumferential temperature rise of the conductive connecting post 4 in real time and transmit the data to the control unit. The control unit adjusts the current density of the busbars and the flow rate of the water-conducting cavity 101 based on the temperature rise trend, ensuring a constant equilibrium between the electric field strength and the temperature gradient at the insulation interface and suppressing mechanical mismatch caused by electrolytic cavitation and thermal expansion and contraction. The interference fit between the insulating kit and the catalytic plate through-holes also serves to position the spacing between the catalytic plates. The spacing between the catalytic plate layers is kept accurate within fifteen microns through consistent gasket thickness, thereby forming strictly aligned parallel electric field lines and uniform fluid shear stress inside the water-conducting cavity 101, providing a stable reaction interface for homogeneous catalytic oxidation reactions.

[0066] Specifically, the insulating kit includes a convex ring 10 and a concave ring 9. The convex ring 10 approaches and is inserted into the pre-opened through hole from one side wall of the first catalytic plate 201 or the second catalytic plate 202, and the concave ring 9 approaches and is inserted between the inner wall of the through hole and the raised outer wall of the convex ring 10 from the other side wall of the first catalytic plate 201 or the second catalytic plate 202, forming a plug-in seal and insulation.

[0067] As can be seen above, the convex ring 10 is first inserted into the prefabricated through-hole from one side of the catalyst plate, forming a circumferential interference fit with the sidewall of the conductive connecting post 4. The outer ring leaves an annular groove in the center of the through-hole. The concave ring 9 is then inserted from the opposite side. The outer wall of the concave ring 9 simultaneously mates with the inner wall of the through-hole and the outer wall of the raised portion of the convex ring 10, creating multiple radial contact surfaces. The radial interference fit provides stable mechanical positioning and durable electrical spacing, while the labyrinthine gap blocks the seepage path of water and metal ions, achieving high dielectric strength insulation and reliable fluid sealing.

[0068] In any of the above embodiments, the control unit includes a controller electrically connected to the first busbar 5 and the second busbar 6. Specifically, a three-phase AC 380V voltage is supplied to an inverter using a new IGBT as a power switching device through three-phase bridge rectification and filtering. After frequency conversion processing, the voltage is stepped down by an intermediate frequency transformer and then rectified to output the DC power required for micro-electrolysis catalysis. A logic control circuit composed of integrated circuits processes feedback on the voltage and current signals to achieve closed-loop control of the entire device. Pulse width modulation (PWM) is used as the core control technology to achieve fast pulse width modulation constant current characteristics, and the device has the function of manually or automatically switching the positive and negative polarity of the power output.

[0069] The controller switches the first catalytic plate 201 and the second catalytic plate 202 to alternately generate metal ions by adjusting the positive electrode of the power supply to connect to the first bus bar 5 or the second bus bar 6 .

[0070] In this embodiment, the control unit integrates an integrated power control system, in which the core controller uses a three-phase AC 380V industrial power supply as the basic power input terminal, and constructs a highly stable DC power supply system by setting the rectification and inversion process inside the power module. Specifically, the AC input power first passes through a three-phase bridge rectifier unit to convert the AC into a pulsating DC signal, and then enters the high-frequency filter circuit. The LC filter composed of a large-capacity thin-film capacitor and a parallel inductor component effectively suppresses harmonics and voltage pulsations to achieve smooth output. The stable DC signal after rectification and filtering is then input into an inverter module with a new type of insulated gate bipolar transistor as the power core device. The inverter reconstructs the DC signal into a high-frequency AC signal based on the PWM pulse sequence issued by the controller, and then performs voltage reduction through an intermediate frequency transformer so that the signal level accurately matches the working voltage range required for the catalytic reaction. Finally, a pure, stable, and adjustable DC power supply for micro-electrolysis catalysis is provided through the rectifier output port.

[0071] The power output is connected to the first busbar 5 and the second busbar 6 via independent wiring. The controller integrates a logic control circuit that collects voltage and current feedback signals from the output circuit to determine the system's operating status in real time. The feedback signal is compared with the target set value internally, and the PID control unit corrects the PWM modulation pulse duty cycle to form an adaptive closed-loop control structure. This structure can accurately maintain the constancy of the output current, ensuring that the current density of the first catalytic plate 201 or the second catalytic plate 202 is stable during the release of metal ions, avoiding non-uniform release concentration or reaction rate fluctuations due to current fluctuations. The system has a high-response pulse width modulation algorithm control core that can complete dynamic adjustments in milliseconds under load changes or power supply disturbances to maintain the electrical consistency of the catalytic reaction environment.

[0072] The controller supports both manual and automatic operating modes. In automatic mode, the controller incorporates built-in timing control logic that automatically switches the positive and negative polarity of the power supply at preset intervals. Through an internal electromagnetic relay matrix, the positive power supply is sequentially connected to the first bus terminal block 5 and the second bus terminal block 6, completing the periodic alternating operation of the first catalytic plate 201 and the second catalytic plate 202. This prevents polarization saturation and activity decay caused by prolonged unipolar operation of a single set of catalytic plates, extending the plate life and improving overall reaction efficiency. In manual mode, the user can select the current output polarity through the panel or remote control system to adapt to specific water treatment requirements or during commissioning.

[0073] In any of the above embodiments, the controller switches the first catalytic plate 201 or the second catalytic plate 202 to generate metal ions in a cycle, and the length of the cycle is negatively correlated with the width of the water-conducting gap 3 along the second direction. After the water-conducting gap 3 becomes wider due to the continuous consumption of the first catalytic plate 201 and the second catalytic plate 202, the water flow rate per unit time is increased. Therefore, it is necessary to gradually increase the metal ion release rate of the first catalytic plate 201 or the second catalytic plate 202, and reduce the negative impact caused by the uneven loss of the first catalytic plate 201 or the second catalytic plate 202 by reducing the cycle.

[0074] In this embodiment, the controller implements periodic alternating control over the metal ion release tasks of the first catalytic plate 201 and the second catalytic plate 202 during operation. A complete release cycle involves sequentially connecting the positive pole of the power supply to the first bus terminal 5 and the second bus terminal 6, thereby alternating the first catalytic plate 201 and the second catalytic plate 202 in the anodic state, completing the electrochemical release of the metal ions. The duration of this cycle is not fixed, but is adjusted in real time by the controller's built-in dynamic adjustment logic based on the width of the water-conducting gap 3 along the second direction. Specifically, the controller senses the actual width of the current water-conducting gap 3 using a capacitive width detection sensor or ultrasonic distance measurement device integrated in the water-conducting cavity 101, and inputs this width parameter into a control curve function module within the controller. The function module presets a negative correlation between the width of the water-conducting gap 3 and the release cycle.

[0075] When the edge structures of the first and second catalytic plates 201, 202 gradually wear out or the active areas of the catalytic surfaces partially decay due to the continuous electrolysis reaction during long-term operation, the effective width of the water-conducting gap 3 along the second direction will slowly expand. This gap expansion directly leads to an increase in the water flow rate per unit time, and the volume of water passing through it increases during the same reaction time, making it difficult to maintain the originally set metal ion release rate in dynamic balance with the pollutant concentration in the water flow. At this time, based on the sensed widening of the water-conducting gap 3, the controller automatically shortens the residence time of the positive electrode of the power supply on the first or second catalytic plate 201, 202, thereby increasing the polarity reversal frequency per unit time and allowing the metal ion release to enter a more efficient frequency excitation state, thereby compensating for the decrease in metal ion concentration per unit volume caused by the widening gap.

[0076] At the same time as shortening the cycle, the controller also increases the duty cycle of the PWM modulation wave, thereby increasing the instantaneous current density applied to the catalyst plate currently in the anode state. This accelerates the release of metal ions in the short-cycle, high-intensity mode, thereby simultaneously enhancing their ability to compensate for concentration in the water. This not only solves the problem of imbalance in the water channel caused by uneven wear at the edges of the catalyst plate, but also enables early correction of local performance degradation in the catalyst plate. By enhancing the release process through both frequency and intensity channels, it suppresses the overall decline in reaction efficiency caused by localized plate performance degradation.

[0077] Specifically, the controller includes an input stage, a rectifier and filter stage, an inverter stage, an intermediate frequency transformer stage, a secondary rectifier stage, an output distribution stage, a polarity switching stage, a detection and feedback stage, a main control algorithm unit, and a cooling protection unit. The following collaborative process is used to perform real-time control of the constant current power supply and polarity alternating load adaptation for the water-conducting gap 3.

[0078] Input and rectification filtering: the input stage receives three-phase 380V industrial frequency power, which is converted into a 540V DC bus through a three-phase full-bridge rectifier unit. The inductor-capacitor low-pass network eliminates the second harmonic and limits the bus ripple to less than 1%, providing a regulated DC source for the inverter stage.

[0079] Two-phase inverter and medium-frequency step-down, the inverter stage adopts insulated gate bipolar transistor full-bridge topology, with a sweep frequency of 20 kHz. The carrier modulation duty cycle is generated in real time by the main control algorithm. The high-frequency AC is stepped down to 30 volts effective value through the medium-frequency transformer. The turns ratio allows discrete switching between 10 and 40 volts through segmented taps to adapt to different water quality conductivity scenarios.

[0080] Three synchronous rectification and output distribution, the medium frequency secondary voltage is converted into zero to thirty volts adjustable DC through the Schottky synchronous rectification module, and then divided into two paths after the DC busbar, and power is respectively supplied to the first bus terminal 5 and the second bus terminal 6. The output distribution stage has a built-in Hall sensor to collect instantaneous currents Iout1 and Iout2, and the sampling period is fifty microseconds.

[0081] Four-polarity switching, the polarity switching stage is composed of a bidirectional solid-state relay matrix, and the execution logic is P1N2 and P2N1 dual-mode alternation. The main control algorithm calculates the alternation period T based on the current water-conducting gap 3 width w and the set reference width w0:

[0082] T=T0·(w0÷w)^α

[0083] T0 is the initial period and α is the empirical index.

[0084] Five detection feedback, the detection feedback level includes:

[0085] Current channel, collecting the instantaneous current Iout1 of the branch where the first catalytic plate is located and the instantaneous current Iout2 of the branch where the second catalytic plate is located;

[0086] The voltage channel collects the DC bus voltage Vbus and the low-voltage DC voltage Vout output to the catalytic plate, reflecting the applied voltage between the electrodes when the catalytic plate is working. It is a direct control variable for controlling the metal ion release rate.

[0087] Width channel, collecting w by capacitive displacement sensors arranged along the second direction;

[0088] Temperature channel, collects the surface temperature of the inverter die and catalyst plate;

[0089] All channel signals are fed into a 120 MHz industrial processor, which executes the following constant current closed loop:

[0090] e=Iref-Iout, which is the instantaneous error e between the reference current and the actual output current, is a direct quantity used by the controller to evaluate the current output state;

[0091] D = Dprev + kp·e + ki·Σe, which is the pulse width modulation duty cycle update rule, where Dprev is the duty cycle of the previous calculation cycle, kp is the proportional coefficient, ki is the integral coefficient, and Σe is the accumulated error from the startup time to the current time. This formula implements proportional-integral control by using both the current error and the historical error to correct the duty cycle, thereby quickly eliminating deviations and avoiding steady-state errors.

[0092] Iref = Ibase (w ÷ w0), which is the reference current linearly amplified by the ratio of the real-time width w of the water-conducting gap 3 to the calibrated width w0. The reference current Ibase is determined by the design flow rate and the target metal ion concentration. When the catalyst plate wears out and causes w to exceed w0, the reference current increases to maintain a constant metal ion dosage per unit volume of water.

[0093] kp and ki are the digital proportional integral coefficients, and D is the duty cycle update period of fifty microseconds.

[0094] As can be seen from the above, through the above architecture, the controller simultaneously increases the release rate as the water flow rate increases due to the gradual widening of the water-conducting gap 3, and maintains a constant metal ion concentration with a negative correlation period. The prestressed compensation and the uniform distribution of the fluid are stably supported, and the ozone homogeneous catalytic oxidation reaction is always carried out under constant flow, constant field and constant gap conditions, thereby significantly improving the processing efficiency and equipment life.

[0095] In any of the above embodiments, the first bus terminal block 5 is formed with at least one first extension edge 501 at the end portion corresponding to the water guide cavity 101, and the second bus terminal block 6 is formed with at least one second extension edge 601 at the end portion corresponding to the water guide cavity 101. Through the multiple first extension edges 501 and the second extension edges 601, more uniform power transmission can be achieved for the wide panels of the first catalytic plate 201 and the second catalytic plate 202, ensuring that the shapes of the first catalytic plate 201 and the second catalytic plate 202 are uniform and controllable during consumption.

[0096] Each conductive connection pillar 4 is electrically connected to the first extension edge 501 or the second extension edge 601 through one end.

[0097] In this embodiment, the first busbar 5 and the second busbar 6 each extend from the ends of their corresponding water-conducting cavities 101 with multiple, structurally complete, symmetrically arranged conductive extension edges, referred to as first extension edges 501 and second extension edges 601, respectively. Each first extension edge 501 is a branching conductive plate extending laterally from the main busbar. It is constructed of a high-conductivity copper alloy and coated with a titanium-iridium alloy electroplating layer resistant to strong oxidizing environments, forming a multi-point power supply structure with extremely low contact resistance. The first extension edges 501 have a rectangular wingspan, resting against the inner cross-section of the water-conducting cavity 101 and distributed along the length of the first catalytic plate 201. Each first catalytic plate 201 is positioned opposite multiple first extension edges 501. Power is transmitted simultaneously from multiple points to the entire surface of the catalytic plate panel, thereby creating a working surface with uniform voltage distribution.

[0098] Correspondingly, the second busbar 6 also has multiple second extension edges 601 at the end of its water-conducting cavity 101 to serve the power supply needs of the second catalytic plate 202. Each conductive connecting post 4 penetrates the corresponding catalytic plate in a transverse sleeve manner, and one end is inserted and tightly fitted to the corresponding extension edge of the busbar. Specifically, a dovetail slot insertion combined with a silver-based conductive spring auxiliary clamping structure is used to achieve an end-to-end electrical connection with low thermal resistance and high current carrying capacity. Multiple conductive connecting posts 4 are respectively connected to multiple first extension edges 501 or second extension edges 601, forming a cross-surface uniform power supply network structure based on the horizontal arrangement. This allows current to be transmitted from the controller through the busbar to the extension edge, and then through the conductive connecting posts 4 to simultaneously act on multiple lateral areas of the catalytic plate.

[0099] This solves the problem of voltage attenuation gradients caused by power injection at only a single point or side in the case of large catalytic plate panels with wide lateral dimensions. Because current has a natural voltage drop distribution in the resistance path, single-sided power supply will result in a lower potential on the side of the catalytic plate away from the contact, which in turn causes inconsistent metal ion release rates, premature wear in local areas of the catalytic plate, and in severe cases, warping, fracture, or rapid degradation of catalytic efficiency. By extending the edge of the multi-point parallel power supply, not only is the potential distribution more balanced, but the risk of Joule heat accumulation caused by local high resistance is also effectively reduced, thereby delaying thermal aging of the catalytic material and damage to the edge structure.

[0100] In any of the above embodiments, the first extended edge 501 corresponds to the middle of the first catalytic plate 201 along the second direction, and / or the second extended edge 601 corresponds to the edge of the second catalytic plate 202 along the second direction; so that the part of the first catalytic plate 201 that is more likely to be consumed is the middle part, and the part of the second catalytic plate 202 that is more likely to be consumed is the edge part. After multiple anode switching, more consumption can be achieved through the middle part of the first catalytic plate 201 and the edge part of the second catalytic plate 202, ensuring that the water guide gap 3 can still maintain a uniform thickness when it is gradually widened, which is conducive to uniform water flow guidance.

[0101] In this embodiment, the multiple first extended edges 501 extending from the first busbar 5 are preferentially arranged along the second direction in the central region of the first catalytic plate 201. Each first extended edge 501, after being transversely connected to the conductive connecting pillar 4, supplies current to the central region of the first catalytic plate 201 in a centralized manner. This results in a higher current density in the central region than in the edge regions when the plate operates as an anode, leading to preferential losses in the central region during metal ion release. In contrast, the multiple second extended edges 601 of the second busbar 6 are primarily arranged along the second direction in the corresponding end regions of the second catalytic plate 202. By concentrating power on the edge regions of the second catalytic plate 202, the catalytic current density in the edge regions is higher than in the central region during anode operation, prompting the edges to enter the metal ion release phase first, resulting in preferential losses at the edges.

[0102] Through the asymmetric power distribution strategy, the first catalytic plate 201 is gradually consumed from the middle to the two sides under multiple anode conditions, while the second catalytic plate 202 is progressively consumed from the edge to the center. Since the electrochemical consumption of the catalytic plates is an irreversible process, the geometric shape of each catalytic plate will inevitably deform and change in thickness over time. The above design achieves dynamic balanced regulation during the expansion of the water-conducting gap 3 by controlling the direction of the consumption trend of different catalytic plates. The weakening of the middle of the first catalytic plate 201 and the weakening of the edge of the second catalytic plate 202 form complementary characteristics, so that the water-conducting gap 3 between the two always maintains a roughly consistent thickness during the slow expansion of the longitudinal dimension, thereby effectively avoiding flow velocity deviation, local short flow or vortex disturbance caused by the asymmetric deformation of the catalytic plates.

[0103] The consistency of the thickness of the water-conducting gap 3 is positively correlated with the homogeneous catalytic oxidation process. Only by maintaining a highly precise parallel flow channel structure along the second direction within the water-conducting gap 3 can water maintain a stable laminar flow or controlled shear flow state as it flows through the gap, ensuring uniform contact and reaction between pollutants, metal ions, and ozone bubbles across the entire cross-section. Therefore, by selecting the position of the extended edge of the busbar and controlling the power density, the geometric wear process of the catalytic plate is controlled and guided. This ensures that the balanced thickness of the water-conducting gap 3 is maintained despite the plate's constantly changing morphology, ultimately guaranteeing the guidance accuracy and uniform distribution of water flow within the water-conducting cavity 101.

[0104] Furthermore, the controller can fine-tune the output current of the first extended edge 501 and the second extended edge 601 based on real-time feedback data. When it is detected that the potential change at the edge or middle area of ​​the catalyst plate exceeds the set threshold, the current supply direction is compensated by adjusting the PWM duty cycle accuracy, so that the power transmission mode can further adapt to the local performance changes of the catalyst plate, thereby achieving more dynamic adaptive loss guidance and water-conducting structure balanced control.

[0105] In any of the above embodiments, a fastening nut 7 is screwed onto the conductive connection column 4 , and an elastic portion 701 is provided at the end of the fastening nut 7 . The elastic portion 701 may be a rubber washer.

[0106] The fastening nut 7 applies prestress to the first catalytic plate 201 through the elastic portion 701, so that the portion of the first catalytic plate 201 corresponding to the conductive connecting column 4 tends to approach the first extension edge 501, so that the portion of the first catalytic plate 201 where consumption occurs can achieve partial displacement compensation under prestress, thereby reducing the impact on the uniformity of the water-conducting gap 3.

[0107] The fastening nut 7 applies prestress to the second catalytic plate 202 through the elastic portion 701, so that the portion of the second catalytic plate 202 corresponding to the conductive connecting column 4 tends to move away from the second extension edge 601, so that the portion of the second catalytic plate 202 where consumption occurs can achieve partial displacement compensation under prestress, thereby reducing the impact on the uniformity of the water-conducting gap 3.

[0108] In this embodiment, each transversely arranged conductive connecting post 4 is threadedly secured with a dedicated fastening nut 7. The tail end of the fastening nut 7 is integrated with an elastic portion 701, preferably a rubber washer, fluororubber seal, or a deformable polymer elastomer gasket. Installed between the fastening nut 7 and the catalyst plate, the elastic portion 701 is compressed during tightening, generating axial elastic deformation. This applies a controllable prestress to the corresponding socket area of ​​the catalyst plate, causing a slight but controlled elastic displacement of the catalyst plate in the direction of the conductive connecting post 4.

[0109] For the first catalytic plate 201, the elastic portion 701 is located on the outside of the socket point where it connects to the conductive connecting column 4. After being tightened by the fastening nut 7, the elastic portion 701 will apply directional prestress, causing the first catalytic plate 201 to slightly abut the first extended edge 501 in the contact area, forming a mechanical offset trend toward the power supply side. Because the central area of ​​the first catalytic plate 201 is a preferentially worn area after serving as an anode multiple times, its thickness will gradually decrease, causing the plate surface in this area to shrink or become concave in shape. The prestress provided by the elastic portion 701 can form a flexible countermeasure to the concave trend caused by the wear of the central area, and keep the connection area near the extended edge in contact and stable in shape and position, thereby balancing the local thickness variation of the water-conducting gap 3 through mechanical compensation, avoiding the non-uniform contraction of the flow channel caused by the prior shrinkage of the central area, and ensuring that the flow velocity field in the central area does not undergo sudden changes.

[0110] Regarding the second catalytic plate 202, the elastic portion 701 is positioned outside the connection area between its edge and the conductive connecting column 4. During the application of pressure by the tightening nut 7, axial elastic deformation also occurs. However, the direction of the applied force causes the local structure of the second catalytic plate 202 to slightly shift away from the second extended edge 601, creating a force offset away from the power supply edge. This offset aligns with the decreasing thickness trend of the second catalytic plate 202 after preferential edge wear. When the edge plate surface sags due to electrochemical wear, it provides a buffering force field to push the plate surface outward to maintain symmetry with the overall thickness of the water-conducting gap 3, preventing excessive edge depression from causing water flow deflection or localized turbulence.

[0111] The prestress provided by the elastic portion 701 not only provides a constant, stable compressive force for the electrical contact between the conductive connecting column 4 and the catalyst plate, preventing loosening and contact resistance fluctuations caused by vibration, water hammer, or thermal expansion and contraction, but also introduces a mechanical adaptive compensation mechanism at the structural level, using soft compression to spatially compensate for subtle geometric changes that occur during catalyst plate wear. This compensation does not require rigid structural positioning, but rather allows for gradual, micron-level displacement. This maintains the overall structural stability of the water-conducting gap 3 while improving the system's tolerance to catalyst plate deformation during long-term operation.

[0112] In any of the above embodiments, the ozone homogeneous catalytic oxidation equipment for advanced sewage treatment further includes:

[0113] The water distribution grid 8 is installed in the water guide cavity 101; the water distribution grid 8 has guide holes arranged in an array, and the guide holes correspond to the water guide gaps 3 along the first direction.

[0114] In this embodiment, the water distribution grid 8 is installed at the upstream inlet of the water diversion chamber 101, positioned in the pre-fluid regulation section before the treated water enters the water diversion gap 3. The water distribution grid 8 is a one-piece frame structure made of corrosion-resistant, high-strength non-metallic material. The grid is transversely embedded within the inner cavity of the water diversion chamber 101 in a sheet-like shape. It is secured to the inner wall of the water diversion chamber 101 using an interference fit or slot-type mounting method, ensuring stability under high flow impacts.

[0115] The core structural feature of the water distribution grid 8 is its uniformly arranged array of guide holes. These guide holes are regularly arranged along a first direction and form a two-dimensional flow surface within the water-conducting cavity 101. The outlet of each guide hole faces the multiple inlet channel areas of the water-conducting gap 3 along the first direction. This allows the water to be divided into multiple independent sub-streams before entering the water-conducting gap 3, forming spatially separated but flow-balanced primary flow units. This ensures that each guide hole has equal flux output capacity while maintaining consistent flow resistance, thereby establishing highly consistent fluid incidence boundary conditions at the microscale.

[0116] Untreated water first enters the upstream section of the water-conducting cavity 101. Passing through the water distribution grid 8, it is forced through multiple guide holes, forming short-range acceleration channels within the holes. The smooth coating on the inner walls of the holes effectively reduces fluid disturbance and shear layer accumulation, reducing the risk of turbulence. After achieving uniform velocity within the holes, the water emerges into the water-conducting gap 3. The distribution of the guide holes is strictly aligned with the water-conducting gap 3 in the first direction, ensuring that each substream has a uniform flow distribution upon entering the gap 3. The water forms a quasi-laminar flow across the entire cross-section, creating an ideal fluid interface for the uniform release of metal ions from the catalytic plate surface.

[0117] Specifically, during operation, sewage enters one end of the catalytic tank and flows through the built-in catalytic electrode group. The catalytic power supply continuously and stably provides corresponding current and voltage to the catalytic electrode group according to the flow rate and water quality parameters of the provided sewage. The current flows from the positive electrode of the catalytic electrode group to the negative electrode of the catalytic electrode group, and a micro-electrolysis reaction occurs on the surface of the catalytic electrode. Under the action of the electric field, the metal on the positive electrode surface of the catalytic electrode plate is detached in the form of ions. In the process of flowing to the negative electrode, the ionic metal is carried away by the water flowing rapidly between the positive and negative electrodes. The sewage containing free metal ions flows out from the other end of the catalytic tank to the sewage pool to react with ozone, thereby achieving the purpose of catalytic oxidation.

[0118] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0119] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. An ozone homogeneous catalytic oxidation equipment for advanced sewage treatment, characterized in that: include: The catalytic tank has a water guide cavity formed inside along a first direction, and the water guide cavity is used to transport water to be treated; A catalytic electrode group is disposed in the water guide cavity; the catalytic electrode group includes a first catalytic plate and a second catalytic plate, the first catalytic plate and the second catalytic plate are alternately arranged in the water guide cavity along a second direction, and a water guide gap for the water to be treated to pass through is formed between the side walls of the first catalytic plate and the side walls of the second catalytic plate; a plurality of the first catalytic plates and a plurality of the second catalytic plates are respectively provided; At least a plurality of conductive connecting posts, each of which extends along the second direction; the conductive connecting posts are connected to all the first catalytic plates and the second catalytic plates; a control unit electrically connected to the first catalytic plate, the second catalytic plate, and an external power supply, respectively, to release metal ions into the water to be treated when the water to be treated passes through the water-conducting gap; when the first catalytic plate or the second catalytic plate is energized to consume and generate the metal ions, the control unit regulates the energized state of the first catalytic plate or the second catalytic plate to maintain a first uniformity of the water-conducting gap along the second direction perpendicular to the second direction and maintain a second uniformity of the metal ions in the water to be treated; In which, the control part includes a first bus terminal block and a second bus terminal block extending into the water guide cavity along the first direction respectively; the first bus terminal block is electrically connected to all first catalytic plates through the conductive connecting column; the second bus terminal block is electrically connected to all second catalytic plates through the conductive connecting column; the first bus terminal block is formed with at least one first extension edge at the end portion corresponding to the water guide cavity, and the second bus terminal block is formed with at least one second extension edge at the end portion corresponding to the water guide cavity; each of the conductive connecting columns is electrically connected to the first extension edge or the second extension edge through one end; the first extension edge corresponds to the middle portion of the first catalytic plate along the second direction, and the second extension edge corresponds to the edge portion of the second catalytic plate along the second direction.

2. The ozone homogeneous catalytic oxidation equipment for advanced sewage treatment according to claim 1, characterized in that: Also included is an insulation kit; Each conductive connecting post connected to the first bus bar is connected to all second catalytic plates through the insulating sleeve; and / or Each conductive connecting column connected to the second bus bar is connected to all the first catalytic plates through the insulating sleeve.

3. The ozone homogeneous catalytic oxidation equipment for advanced sewage treatment according to claim 1, characterized in that: The control unit includes a controller, and the controller is electrically connected to the first bus bar and the second bus bar respectively; The controller adjusts the positive electrode of the power supply to connect to the first bus bar or the second bus bar, so as to switch the first catalytic plate and the second catalytic plate to alternately generate the metal ions.

4. The ozone homogeneous catalytic oxidation equipment for advanced sewage treatment according to claim 3, characterized in that: The controller switches the first catalytic plate or the second catalytic plate to generate the metal ions in a cycle, and the length of the cycle is negatively correlated with the width of the water-conducting gap along the second direction.

5. The ozone homogeneous catalytic oxidation equipment for advanced sewage treatment according to claim 1, characterized in that: A fastening nut is screwed onto the conductive connecting column, and an elastic portion is provided at the end of the fastening nut; The fastening nut applies prestress to the first catalytic plate through the elastic portion, so that the portion of the first catalytic plate corresponding to the conductive connecting column tends to approach the first extension edge; The fastening nut applies prestress to the second catalytic plate through the elastic portion, so that the portion of the first catalytic plate corresponding to the conductive connecting column tends to move away from the first extension edge.

6. The ozone homogeneous catalytic oxidation equipment for advanced sewage treatment according to claim 1, characterized in that: Also includes: A water distribution grid is installed in the water guide cavity; the water distribution grid has guide holes arranged in an array, and the guide holes correspond to the water guide gaps along the first direction.

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