Cathode structure for a circulating water electrochemical treatment device and circulating water electrochemical treatment device

Abstract

The application discloses a cathode structure for a circulating water electrochemical treatment device and the circulating water electrochemical treatment device, and the cathode structure comprises a bottom link, a plurality of surface layer cathodes, a plurality of bottom layer cathodes and a scraper assembly, the plurality of surface layer cathodes form a second cathode layer, the plurality of bottom layer cathodes form a first cathode layer, the first cathode layer and the second cathode layer are staggered in front and back, and the scraper assembly covers the second cathode layer. By changing the structure of the cathode, the application can reduce the aggregation of bubbles by shortening the distance of the bubble rising section without changing the cathode reaction area, change the bubble separation path, make the bubbles more easily separate from the cathode, increase the actual contact area of the ions in the solution and the cathode, effectively weaken the negative influence caused by the bubble aggregation, enhance the ability of the solution to flow to the surface of the cathode, improve the electrochemical water softening efficiency, reduce the power consumption of the electrolytic water, and complete the descaling work of the front and back two layers of cathodes through the unique structure design.

Description

Technical Field

[0001] This invention relates to the technical field of circulating water electrochemical treatment devices, and in particular to a cathode structure for a circulating water electrochemical treatment device and the circulating water electrochemical treatment device itself. Background Technology

[0002] In recent years, different technical approaches have emerged to address the scaling problem in industrial circulating water, including chemical methods and methods for removing scale-forming ions from water. Chemical methods involve adding descaling agents to the circulating water to remove and inhibit scale formation. However, this method suffers from high costs, low concentration ratios, large wastewater discharge volumes, and the potential for secondary pollution during the discharge process, which contradicts the principles of environmental friendliness and sustainable development. Methods for removing scale-forming ions from water mainly include Na+ exchange, reverse osmosis, electrodialysis, and electrochemical descaling. Electrochemical descaling directly precipitates scale-forming ions (calcium, magnesium ions, etc.) from the water through ionization, increasing the concentration ratio of the circulating water, effectively reducing wastewater discharge and makeup water volume, and avoiding secondary pollution. Simultaneously, electrochemical methods can generate highly oxidizing active substances that effectively kill microorganisms and algae in the circulating water. Therefore, this method has broad application prospects in the field of circulating water quality stabilization and scale prevention.

[0003] The main working principle of electrochemical water treatment technology is that, under the influence of a DC power supply, the anode and cathode immersed in water undergo oxidation and reduction reactions with the anions and cations in the water, generating various components that inhibit scale formation, kill bacteria and algae, and prevent corrosion. During the electrochemical water softening process, the cathode primarily produces hydrogen gas. When the bubbles grow large enough, they overcome adhesion forces (such as surface tension and bubble growth force) and detach from the cathode wall. However, bubble accumulation reduces the reaction area of ​​the cathode. When a large number of bubbles are adsorbed on the cathode wall, a gas film forms, causing cathode passivation and deactivation. Simultaneously, the gas released from the cathode wall disperses in the electrolyte as bubbles, making the electrolyte a gas-liquid mixture and reducing the actual conductivity. Therefore, bubble accumulation effectively reduces the actual reaction area of ​​the cathode. Furthermore, calcium and magnesium ions in the circulating water migrate to the vicinity of the cathode wall under the influence of the electric field, combining with carbonate and hydroxide ions generated on the cathode wall to form calcium carbonate and magnesium hydroxide precipitates on the cathode plate, affecting the actual conductivity.

[0004] Chinese invention patent CN221479642U discloses an electrochemical treatment device for industrial cooling circulating water, comprising: a housing; a cathode plate and an anode plate, arranged parallel to each other within a sealed housing, with a cathode plate on each side of the anode plate; wherein the cathode plate includes: a cathode stainless steel wire base plate, one side of which is fixed to the housing via two cathode plate terminals, and the other side of which is fixed to a cathode plate support frame within the housing via upper and lower cathode stainless steel wire base plate support rods; numerous parallel fine grooves are horizontally formed on the cathode stainless steel wire base plate, with stainless steel wires of equal length densely embedded in each groove, each stainless steel wire perpendicular to the plane of the cathode stainless steel wire base plate; each stainless steel wire protrudes from both sides of the corresponding cathode stainless steel wire base plate plane, with the exposed stainless steel wires on both sides having the same length. This technical solution fails to address the problem of the influence of air bubbles.

[0005] In view of this, this application aims to develop a cathode structure to solve the problem of decreased conductivity in existing circulating water electrochemical treatment devices. Summary of the Invention

[0006] The purpose of this invention is to provide a cathode structure and a circulating water electrochemical treatment device. Through a unique structural design, the negative impact of bubble aggregation is effectively reduced, while the descaling of the front and rear cathodes is completed.

[0007] The main working principle of electrochemical water treatment technology is that, under the action of DC power, the anode and cathode immersed in water undergo oxidation and reduction reactions with the anions and cations in the water to generate various components, which play a role in scale inhibition and descaling, sterilization and algae removal, and corrosion prevention and slowing.

[0008] In this process, a reduction reaction occurs at the cathode, generating OH- ions. Some of these OH- ions react with HCO3-. - The reaction produces CO3 2- Ca in circulating water 2+ Mg 2+ CO3 generated at the cathode 2- It reacts with OH- to produce two insoluble substances, CaCO3 and Mg(OH)2, which are directly deposited from the cathode plate. The Ca in the water... 2+ Mg 2+ HCO3 - As the concentration decreases, the hardness and alkalinity of the circulating water also decrease. The electrochemical reaction at the cathode in electrochemical descaling is as follows:

[0009] O2 + 2H2O + 4e - →4OH - (1)

[0010] 2H2O+2e - →H2+2OH - (2)

[0011]

[0012]

[0013] Under the influence of electric current, oxidation occurs at the anode, and redox reactions occur in the water. Depending on the degree of oxidation, different amounts of OH, O3, H2O2, and ClO are generated. - Strong oxidizing substances react with organic matter in redox reactions, directly damaging the cell membranes of microorganisms, leading to their death or inactivation, thus achieving a bactericidal and algae-killing effect. The electrochemical reaction at the anode of electrochemical descaling is as follows:

[0014] 4OH - -4e - →2H₂O + O₂ (5)

[0015] 2Cl - →Cl2+2e (6)

[0016] Cl₂ + H₂O → Cl - +ClO - +2H + (7)

[0017] These substances all possess strong oxidizing and penetrating properties, capable of causing cell lysis and death. Therefore, they can effectively remove algae and kill bacteria.

[0018] Based on the reactions in the anode and cathode regions, it can be seen that the increase in OH- at the cathode creates an alkaline region near the cathode, thereby promoting the reaction of CO32-. 2- The formation of scale-forming ions, Ca2+, in circulating water. 2+ Mg 2+ It will be attracted to the vicinity of the cathode under the influence of the electric field, and react with CO3. 2- OH- ions are generated and precipitated, depositing on the cathode surface of the electrolytic cell.

[0019] Single-sided mesh cathodes are the commonly used cathode type in electrochemical water softening reactions. Conventional single-sided cathodes are continuous planes in the vertical direction, and there is a distinct dense bubble layer in the reaction. This dense bubble layer consists of a large number of newly formed bubbles and bubbles floating below. Under normal gravity, the bubbles are mainly affected by the adhesion force and buoyancy of the cathode plate. In the process of detaching from the cathode, they can only slide upwards along the cathode until they detach at the top of the cathode. Therefore, when the vertical distance on the cathode surface is long, the generation and aggregation of bubbles make it more difficult for newly formed bubbles to diffuse.

[0020] This invention reduces bubble aggregation by changing the structure of the cathode and using an alternating design of the upper and lower cathode layers, without changing the cathode reaction area, by shortening the distance of the bubble rising section. At the same time, through its unique structural design, this application can complete the descaling of both the front and rear cathode layers in a single operation.

[0021] To achieve the above objectives, the present invention provides a cathode structure for a circulating water electrochemical treatment device, comprising a bottom connecting rod, a plurality of surface cathodes, a plurality of bottom cathodes, and a scraper assembly. The plurality of bottom cathodes are evenly spaced from top to bottom along the bottom connecting rod, forming a first cathode layer. A lifting handwheel is provided at the top of the bottom connecting rod; when the lifting handwheel rotates, the rotational motion is transmitted to the plurality of bottom cathodes through the bottom cathode connecting rod. The plurality of surface cathodes are evenly spaced from top to bottom along the side of the first cathode layer away from the bottom connecting rod, forming a second cathode layer. Adjacent surface cathodes are spaced apart... The second cathode layer is provided within the interval, and the upper and lower ends of the upper surface of the bottom cathode overlap with the ends of the lower surface of the adjacent surface cathode. The entire second cathode layer is fixed in the circulating water electrochemical treatment device. The scraper assembly covers the side of the second cathode layer away from the first cathode layer. The scraper assembly includes an upper mounting wall, a lower mounting wall, a mounting frame, and scraper blades. The upper mounting wall and the lower mounting wall are respectively vertically fixed on the bottom connecting rod. The mounting frame is fixed between the upper mounting wall and the lower mounting wall. Scraper blades are installed on the mounting frame facing the surface cathode. The bottom of the upper surface of each surface cathode is in contact with a scraper blade.

[0022] The entire second cathode layer is fixed relative to the bottom connecting rod. The bottom connecting rod is a screw with external threads and a nut on it. The bottom cathode, upper mounting wall, and lower mounting wall are fixed to the nut. The top of the screw is threadedly connected to the lifting handwheel. When the lifting handwheel is rotated, it drives the screw to rotate. The nut fixed to the screw moves along the screw axis under the action of the screw thread, thereby driving the bottom cathode and scraper assembly to reciprocate up and down to remove the deposits.

[0023] According to an embodiment of this application, the surface cathode is a mesh cathode with a grid pattern, and the bottom cathode is a honeycomb cathode with a grid pattern.

[0024] According to an embodiment of this application, the distance between the surface cathode and the bottom cathode is 2 mm.

[0025] According to an embodiment of this application, the bottom cathode of the first cathode layer is located below the surface cathode of the second cathode layer.

[0026] According to an embodiment of this application, the surface cathode and the bottom cathode are the same size and are both made of titanium metal with a porous structure.

[0027] According to an embodiment of this application, the length of the scraper blade corresponds to the length of the surface cathode.

[0028] According to an embodiment of this application, the upper and lower ends of the second cathode layer are respectively fixed to the mounting bracket by screws.

[0029] According to an embodiment of this application, a mounting frame is wrapped around the outside of a plurality of corresponding surface cathodes, and a scraper blade connecting screw hole is provided on the frame. The scraper blade is fixed on both sides of the long side of the mounting frame and contacts the upper surface of the surface cathode.

[0030] Another aspect of this application discloses a circulating water electrochemical treatment device, including the cathode structure as described above, characterized in that the circulating water electrochemical treatment device further includes a central air conditioning condenser, a cooling tower, a circulating pump, and a dosing device.

[0031] According to an embodiment of this application, a circulating water drain pipe, a circulating water drain valve one, and a circulating water drain valve two are installed at the bottom of the cooling tower, and a drain hole is opened on the circulating water drain pipe.

[0032] The advantages of the present invention over the prior art are:

[0033] 1. This invention reduces bubble aggregation by altering the cathode structure and using an interleaved design of upper and lower cathodes, without changing the cathode reaction area. This reduces the distance of the bubble rising section, changes the bubble detachment path, and makes it easier for bubbles to detach from the cathode. This increases the actual contact area between ions in the solution and the cathode, which is beneficial for the detachment of bubbles on the middle bottom cathode. This solves the problem of bubble enrichment on the cathode in the prior art, effectively reduces the negative impact of bubble aggregation, enhances the ability of the solution to flow to the cathode surface, improves the reaction flow field, promotes mass transfer, improves the efficiency of electrochemical water softening, and reduces the energy consumption of water electrolysis.

[0034] 2. Through its unique structural design, this invention features a scraper on the surface of the top cathode, which, when attached to the bottom of the bottom cathode, acts similarly to a scraper. This allows for the complete descaling of both cathode layers in a single operation. This invention improves the removal rate of calcium and magnesium ions in the electrochemical treatment device and reduces the energy consumption of the equipment. Consequently, the electrochemical treatment device is more efficient in descaling and scale inhibition in industrial circulating cooling water systems, thus possessing greater practicality.

[0035] 3. Because this invention improves the removal rate of calcium and magnesium ions in the electrochemical treatment device and reduces the energy consumption of the equipment, the number or size of the required electrochemical treatment devices can be reduced compared to industrial circulating cooling water systems with the same circulating water volume, thus reducing the user's initial investment and achieving a higher cost-effectiveness ratio. Attached Figure Description

[0036] Figure 1This is a cross-sectional view of a cathode structure for an electrochemical treatment device for circulating water, as exemplified by the present invention.

[0037] Figure 2 This is a front view of a cathode structure for a circulating water electrochemical treatment device, as exemplified by the present invention.

[0038] Figure 3 This is a front view of the scraper assembly as an example of the present invention;

[0039] Figure 4 This is a front view of the second cathode layer in an example of the present invention;

[0040] Figure 5 This is a front view of the second cathode layer in an example of the present invention.

[0041] The annotations in the attached figures are explained as follows:

[0042] 1. Lifting handwheel, 10. First cathode layer, 11. Bottom cathode, 12. Bottom connecting rod, 20. Second cathode layer, 21. Surface cathode, 30. Scraper assembly, 31. Upper mounting wall, 32. Lower mounting wall, 33. Mounting frame, 34. Scraper blade. Detailed implementation method:

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0044] Please see Figures 1 to 5 As shown, a cathode structure for a circulating water electrochemical treatment device is illustrated, including a bottom connecting rod 12, a plurality of surface cathodes 21, a plurality of bottom cathodes 11, and a scraper assembly 30.

[0045] In this embodiment, a number of bottom cathodes 11 are evenly spaced from top to bottom along the bottom connecting rod 12 to form a first cathode layer 10; a lifting handwheel 1 is provided at the top of the bottom connecting rod 12, and when the lifting handwheel 1 rotates, the rotational motion is transmitted to the number of bottom cathodes 11 through the bottom cathode 11 connecting rod.

[0046] Specifically, such as Figure 1 , Figure 5 As shown, several bottom cathodes 11 are attached to the bottom connecting rod 12, and the spacing between the upper and lower bottom cathodes 11 is uniform. A bottom cathode 11 is provided at the bottom of the bottom connecting rod 12.

[0047] Specifically, the bottom cathode 11 can be a honeycomb mesh cathode.

[0048] Specifically, the bottom connecting rod 12 can be a screw with external threads, and the lifting handwheel 1 can be a wheel with internal threads. The bottom connecting rod 12 and the lifting handwheel 1 are connected by threads. A nut is provided on the screw, and the bottom cathode 11 is fixedly installed on the nut.

[0049] Several surface cathodes 21 are evenly spaced from top to bottom along the side of the first cathode layer 10 away from the bottom connecting rod 12 to form a second cathode layer 20. A bottom cathode 11 is provided in the interval between adjacent surface cathodes 21, and the upper and lower ends of the upper surface of the bottom cathode 11 overlap with the ends of the lower surface of the adjacent surface cathode 21, respectively. The entire second cathode layer 20 is fixed in the circulating water electrochemical treatment device.

[0050] Specifically, the upper and lower ends of the second cathode layer 20 are fixed to the mounting bracket by screws, that is, the plane where the surface cathode 21 is located is fixed, and the entire second cathode layer 20 is fixed relative to the bottom connecting rod 12.

[0051] Specifically, such as Figure 1 , Figure 4 As shown, the surface cathode 21 can be a mesh cathode, which is set downwards from the top of the second cathode layer 20. The surface cathode 21 is fixed at both the top and bottom of the second cathode layer 20. Furthermore, in the static state, the bottom cathode 11 at the bottom of the first cathode layer 10 is located below the surface cathode 21 at the bottom of the second cathode layer 20. When the first cathode layer 10 moves up and down relative to the second cathode layer 20, the bottom cathode 11 at the bottom of the first cathode layer 10 acts as a scraper for the surface cathode 21 at the bottom of the second cathode layer 20.

[0052] Specifically, in practical applications, the number of bottom cathodes 11 and surface cathodes 21 can be increased according to the required processing capacity. The first cathode layer 10 and the second cathode layer 20 can be divided into two or more layers of bottom cathodes 11 and surface cathodes 21, and each layer can be composed of multiple bottom cathodes 11 or multiple surface cathodes 21.

[0053] Specifically, the distance between the surface cathode 21 and the bottom cathode 11 is 2mm, with their heights alternating.

[0054] Specifically, the surface cathode 21 and the bottom cathode 11 are the same size and are both made of titanium metal with a porous structure.

[0055] In this embodiment, the scraper assembly 30 covers the side of the second cathode layer 20 away from the first cathode layer 10. The scraper assembly 30 includes an upper mounting wall 31, a lower mounting wall 32, a mounting frame 33, and a scraper blade 34. The upper mounting wall 31 and the lower mounting wall 32 are respectively vertically fixed on the bottom connecting rod 12. The mounting frame 33 is fixed between the upper mounting wall 31 and the lower mounting wall 32. The scraper blade 34 is mounted on the mounting frame 33 facing the surface cathode 21. The scraper blade 34 is in contact with the bottom of the upper surface of each surface cathode 21.

[0056] Specifically, the length of the scraper blade 34 corresponds to the length of the surface cathode 21, so that the scraper blade 34 can scrape the entire surface cathode 21.

[0057] Specifically, the mounting frame 33 is wrapped around the outside of the corresponding surface cathodes 21, and the mounting frame 33 has screw holes for connecting scraper blades 34. The scraper blades 34 are fixed on both sides of the long side of the mounting frame 33 and contact the upper surface of the surface cathodes 21.

[0058] Specifically, the number of scraper blades 34 corresponds to the number of surface cathodes 21.

[0059] Understandably, the bottom connecting rod 12 is a screw with external threads, and a nut is provided on the screw. The bottom cathode 11, the upper mounting wall 31, and the lower mounting wall 32 are fixed on the nut. The top of the screw is threadedly connected to the lifting handwheel 1. When the lifting handwheel 1 is rotated, it drives the screw to rotate. The nut fixed on the screw will move along the screw axis under the action of the screw thread, thereby driving the bottom cathode 11 and the scraper assembly 30 to reciprocate up and down, so as to achieve the purpose of scraping off the deposits.

[0060] Another aspect of this application discloses a circulating water electrochemical treatment device, including the cathode structure as described above. The circulating water electrochemical treatment device also includes a central air conditioning condenser, a cooling tower, a circulating pump, and a dosing device.

[0061] Specifically, the bottom of the cooling tower is equipped with a circulating water drain pipe, a circulating water drain valve one, and a circulating water drain valve two, and the circulating water drain pipe has a drain hole.

[0062] Example 1

[0063] The surface cathode 21 and the bottom cathode 11 adopt a mesh structure, are made of titanium, and are of equal size. The surface cathode 21, the bottom cathode 11, and the scraper of the surface cathode 21 are not on the same plane, but are staggered, with an overlap of 2 mm. The surface cathode 21 is fixed and is fixed in the circulating water electrochemical device. The connecting rod of the bottom cathode 11 is fixedly connected to the connecting rod of the scraper of the surface cathode 21. The bottom cathode 11 is connected to the lifting handwheel 1 through the connecting rod of the bottom cathode 11 and can move up and down. The scraper of the surface cathode 21 is connected to the lifting handwheel 1 through the connecting rod of the surface cathode 21 and can move up and down.

[0064] After the cathode of the circulating water electrochemical device has been working for a period of time, the lifting handwheel 1 is rotated to make the screw rotate, which drives the connecting rod of the bottom cathode 11 and the upper and lower mounting walls 32 of the surface cathode 21 to move up and down. This causes the scrapers of the bottom cathode 11 and the surface cathode 21 to move back and forth relative to the surface cathode 21. When the bottom cathode 11 moves up and down relative to the surface cathode 21, the surface cathode 21 can be used as a scraper to scrape off the CaCO3 and Mg(OH)2 on the surface of the bottom cathode 11; when the scrapers of the surface cathode 21 move back and forth relative to the surface cathode 21, the CaCO3 and Mg(OH)2 on the surface of the surface cathode 21 can be scraped off.

[0065] In summary, the technical solution of this application has the following beneficial effects:

[0066] 1. This invention reduces bubble aggregation by altering the cathode structure and using an interleaved design of upper and lower cathodes, without changing the cathode reaction area. This reduces the distance of the bubble rising section, changes the bubble detachment path, and makes it easier for bubbles to detach from the cathode. This increases the actual contact area between ions in the solution and the cathode, which is beneficial for the detachment of bubbles on the middle bottom cathode. This solves the problem of bubble enrichment on the cathode in the prior art, effectively reduces the negative impact of bubble aggregation, enhances the ability of the solution to flow to the cathode surface, improves the reaction flow field, promotes mass transfer, improves the efficiency of electrochemical water softening, and reduces the energy consumption of water electrolysis.

[0067] 2. Through its unique structural design, this invention features a scraper on the surface of the top cathode, which, when attached to the bottom of the bottom cathode, acts similarly to a scraper. This allows for the complete descaling of both cathode layers in a single operation. This invention improves the removal rate of calcium and magnesium ions in the electrochemical treatment device and reduces the energy consumption of the equipment. Consequently, the electrochemical treatment device is more efficient in descaling and scale inhibition in industrial circulating cooling water systems, thus possessing greater practicality.

[0068] 3. Because this invention improves the removal rate of calcium and magnesium ions in the electrochemical treatment device and reduces the energy consumption of the equipment, the number or size of the required electrochemical treatment devices can be reduced compared to industrial circulating cooling water systems with the same circulating water volume, thus reducing the user's initial investment and achieving a higher cost-effectiveness ratio.

[0069] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A cathode structure for a circulating water electrochemical treatment device, characterized in that, Includes a bottom connecting rod, several surface cathodes, several bottom cathodes, and a scraper assembly. A plurality of bottom cathodes are evenly spaced from top to bottom along the bottom connecting rod to form a first cathode layer; a lifting handwheel is provided at the top of the bottom connecting rod, and when the lifting handwheel rotates, the rotational motion is transmitted to the plurality of bottom cathodes through the bottom cathode connecting rod; A plurality of surface cathodes are evenly spaced from top to bottom along the side of the first cathode layer away from the bottom connecting rod to form a second cathode layer. The bottom cathode is provided in the interval between adjacent surface cathodes. The upper and lower ends of the upper surface of the bottom cathode overlap with the ends of the lower surface of the adjacent surface cathode. The entire second cathode layer is fixed in the circulating water electrochemical treatment device. The scraper assembly covers the side of the second cathode layer away from the first cathode layer. The scraper assembly includes an upper mounting wall, a lower mounting wall, a mounting frame, and scraper blades. The upper mounting wall and the lower mounting wall are respectively vertically fixed to the bottom connecting rod. The mounting frame is fixed between the upper mounting wall and the lower mounting wall. Scraper blades are mounted on the mounting frame facing the surface cathode. The scraper blades are in contact with the bottom of the upper surface of each surface cathode. The entire second cathode layer is fixed relative to the bottom connecting rod; The bottom connecting rod is a screw with external threads, and a nut is provided on the screw. The bottom cathode, upper mounting wall, and lower mounting wall are fixed to the nut. The top of the screw is threadedly connected to the lifting handwheel. When the lifting handwheel is rotated, it drives the screw to rotate. The nut fixed on the screw will move along the screw axis under the action of the screw thread, thereby driving the bottom cathode and scraper assembly to reciprocate up and down to achieve the purpose of scraping off the deposits.

2. The cathode structure for a circulating water electrochemical treatment device according to claim 1, characterized in that, The surface cathode is a mesh cathode with a grid pattern, and the bottom cathode is a honeycomb cathode with a grid pattern.

3. The cathode structure for a circulating water electrochemical treatment device according to claim 1, characterized in that, The surface cathode and the bottom cathode are staggered by a distance of 2 mm.

4. The cathode structure for a circulating water electrochemical treatment device according to claim 1, characterized in that, The bottom cathode at the bottom of the first cathode layer is located below the surface cathode at the bottom of the second cathode layer.

5. The cathode structure for a circulating water electrochemical treatment device according to claim 1, characterized in that, The surface cathode and the bottom cathode are the same size and are both made of titanium metal with a porous structure.

6. The cathode structure for a circulating water electrochemical treatment device according to claim 1, characterized in that, The length of the scraper blade corresponds to the length of the surface cathode.

7. The cathode structure for a circulating water electrochemical treatment device according to claim 1, characterized in that, The upper and lower ends of the second cathode layer are fixed to the mounting bracket by screws.

8. The cathode structure for a circulating water electrochemical treatment device according to claim 1, characterized in that, The mounting frame surrounds the exterior of the corresponding plurality of surface cathodes, and has screw holes for connecting scraper blades on it. The scraper blades are fixed on both sides of the long side of the mounting frame and contact the upper surface of the surface cathodes.

9. A circulating water electrochemical treatment device, comprising the cathode structure as described in any one of claims 1-8, characterized in that, It also includes central air conditioning condensers, cooling towers, circulating pumps, and chemical dosing devices.

10. The circulating water electrochemical treatment device according to claim 9, characterized in that, The bottom of the cooling tower is equipped with a circulating water drain pipe, a circulating water drain valve one, and a circulating water drain valve two, and the circulating water drain pipe has a drain hole.

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