Anti-scaling sodium hypochlorite preparation device and method

Abstract

The invention relates to an anti-scaling sodium hypochlorite preparation device and method, and belongs to the technical field of sodium hypochlorite preparation, the anti-scaling sodium hypochlorite preparation device comprises an electrolytic bath main body, a rotary anode mechanism, a fixed cathode mechanism, a physical cleaning mechanism, a state monitoring mechanism and a controller; the electrolytic bath main body is used for accommodating electrolyte and bearing each mechanism; the rotating anode mechanism is arranged in the electrolytic bath main body and comprises a multi-surface anode rotating along with a rotating shaft and a stepping motor for driving the rotating shaft; the fixed cathode mechanism is composed of a plurality of cathode plates fixed on the inner wall of the electrolytic bath main body and forms an array around the rotary anode mechanism; and the physical cleaning mechanism is fixedly arranged on the inner wall of the electrolytic bath main body and is in scraping fit with the rotating path of the polyhedral anode, the physical cleaning mechanism is used for scraping and cleaning the scaling surface, and electrolysis production does not need to be interrupted in the whole process.

Description

Technical Field

[0001] This invention relates to the field of sodium hypochlorite preparation, specifically to an anti-scaling sodium hypochlorite preparation apparatus and method. Background Technology

[0002] In the electrolytic preparation of sodium hypochlorite, scale inevitably forms on the anode surface of the electrolytic cell. This scale hinders current flow, leading to reduced electrolysis efficiency and, in severe cases, even electrode passivation and failure. Traditionally, this problem has been addressed through timed acid washing or manual cleaning, but both methods have significant drawbacks. Timed acid washing requires interrupting production, affecting its continuity, and improper operation can damage the catalytic coating on the electrode surface. Manual cleaning also interrupts the production process and is inefficient. Therefore, existing technologies have limitations in ensuring the continuity of the sodium hypochlorite preparation process, the stability of electrolysis efficiency, and the lifespan of the electrodes.

[0003] The information disclosed in the background section is only for enhancing the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-scaling sodium hypochlorite preparation apparatus and method to solve the problems mentioned in the background art.

[0005] The technical solution of the present invention includes an electrolytic cell body, a rotating anode mechanism, a fixed cathode mechanism, a physical cleaning mechanism, a status monitoring mechanism, and a controller; The main body of the electrolytic cell is used to contain the electrolyte and support various mechanisms; The rotating anode mechanism is located inside the main body of the electrolytic cell and includes a multi-faceted anode that rotates with the rotating shaft and a stepper motor for driving the rotating shaft. The fixed cathode mechanism consists of multiple cathode plates fixed on the inner wall of the electrolytic cell body, forming an array around the rotating anode mechanism; The physical cleaning mechanism is fixedly installed on the inner wall of the electrolytic cell body and forms a scraping engagement with the rotation path of the multi-faceted anode. The status monitoring mechanism is installed on the side wall of the electrolytic cell body and is used to collect surface images of the multifaceted anode. The controller is electrically connected to both the stepper motor and the status monitoring mechanism, and is used to control the rotation of the stepper motor based on the acquired surface image.

[0006] Preferably, the multifaceted anode of the rotating anode mechanism is a regular hexagonal prism anode, and each of its six sides is provided with a catalytic coating; the stepper motor is used to precisely drive the rotating shaft to rotate in 60-degree increments.

[0007] Preferably, the status monitoring mechanism includes a sealed observation window horizontally inserted from the side wall of the electrolytic cell body, a miniature camera probe disposed inside the sealed observation window, and a planar light source surrounding the miniature camera probe; the lens of the miniature camera probe is vertically downward focused on the surface of the multifaceted anode directly below it.

[0008] Preferably, the physical cleaning mechanism includes a fixed bracket and a cleaning brush; the cleaning brush is installed in such a position that when the multifaceted anode rotates, its side edges can scrape across the bristles of the cleaning brush.

[0009] A method for preparing anti-scaling sodium hypochlorite includes: The controller collects and generates a set of current status data, which is defined as including the anode surface image obtained by the status monitoring mechanism and the operating voltage obtained by the electrolytic power supply. The controller makes a collaborative cleaning decision based on the current state data and preset cleaning trigger conditions. The collaborative cleaning decision is used to generate a cleaning instruction. The cleaning trigger conditions are defined as a logical relationship satisfied by one or more visual scaling features generated by the anode surface image and electrical passivation features generated by the operating voltage. The controller executes the cleaning command by first instructing the electrolytic power supply to apply a reverse current pulse to the currently working anode surface, and then instructing the stepper motor to drive the rotating anode mechanism to rotate by a preset angle to complete the switching of the working surface.

[0010] Preferably, the visual scaling feature is the scaling coverage rate, which is obtained by the controller after binarizing the image of the anode surface; the electrical passivation feature is the voltage increment value, which is obtained by the controller calculating the difference between the operating voltages at two different acquisition time points.

[0011] Preferably, the logical relationship of the cleaning triggering condition includes one of the following judgments: The time change rate of the scale coverage is compared with the time change rate of the working voltage, and the calculated visual-electrical feature deviation exceeds a first preset threshold. The voltage increment value is compared with the scale coverage increment value, and the calculated scale voltage sensitivity factor exceeds a second preset threshold.

[0012] Preferably, the logical relationship of the cleaning triggering condition further includes one of the following safety judgments: The absolute value of the scale coverage exceeds a preset coverage upper limit threshold; The absolute value of the operating voltage exceeds a voltage upper limit threshold set based on the initial operating voltage after the end of the previous cleaning process.

[0013] This invention provides an improved apparatus and method for preparing anti-scaling sodium hypochlorite, which has the following improvements and advantages compared with the prior art: 1. This solution integrates a rotating anode mechanism, a status monitoring mechanism, a physical cleaning mechanism, and a controller to achieve automated anti-scaling function. The status monitoring mechanism can collect image information of the anode surface in real time for the controller to analyze. When the controller determines that the anode scale needs to be cleaned, it will drive the rotating anode mechanism to rotate, and at the same time the physical cleaning mechanism will scrape and clean the scaled surface. The whole process does not require interruption of electrolysis production. 2. This solution introduces intelligent cleaning decision-making based on multi-parameter collaboration, which significantly improves the accuracy and efficiency of cleaning. The controller not only analyzes the anode surface images provided by the status monitoring agency to obtain visual scaling characteristics, such as scaling coverage, but also simultaneously collects the working voltage of the electrolysis power supply to obtain electrical passivation characteristics, such as voltage increment value. Through comprehensive analysis of these two types of data, the controller can more accurately determine the true health status of the anode and the necessity of cleaning. 3. This solution defines two advanced diagnostic logics to trigger cleaning: Visual-Electrical Feature Deviation: This logic identifies transparent or difficult-to-visually-identify high-resistivity scale, such as silicate scale, by comparing the time-varying rate of scale coverage with the time-varying rate of operating voltage. If the deviation between these two rates exceeds a preset threshold, cleaning is immediately triggered, overcoming the limitations of traditional methods that rely solely on visual detection. Scale Voltage Sensitivity Factor: This logic quantifies the actual impact of newly formed scale per unit area on voltage by dividing the voltage increment by the scale coverage increment. This allows the system to identify dense scale with extremely high resistivity, even if the coverage area is small, enabling more precise preventative maintenance. Collaborative Cleaning: The cleaning process combines electrochemical and mechanical methods. The controller applies a reverse current pulse to loosen the scale, subsequently driving the anode to rotate, causing the bristles of the physical cleaning mechanism to scrape away the scale. This collaborative approach is more efficient than simple mechanical scraping. Attached Figure Description

[0014] The present invention will be further explained below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall external structure of the device; Figure 2 This is a schematic diagram of the main structure of the electrolytic cell; Figure 3 This is a cross-sectional structural diagram of the main body of the electrolytic cell; Figure 4 This is a top view of the internal structure of the main body of the electrolytic cell; Figure 5 This is a structural diagram of the status monitoring mechanism; Figure 6 This is a schematic diagram of the process flow of the method of the present invention.

[0015] In the diagram: 100, main body of the electrolytic cell; 200, rotating anode mechanism; 220, regular hexagonal prism anode; 230, stepper motor; 300, status monitoring mechanism; 310, sealed observation window; 320, miniature camera probe; 330, surface light source; 400, physical cleaning mechanism; 500, fixed cathode mechanism; 510, cathode plate. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0017] Example 1

[0018] Please see Figure 1-5 The present invention provides an anti-scaling sodium hypochlorite preparation device, including an electrolytic cell body 100, a rotating anode mechanism 200, a fixed cathode mechanism 500, a physical cleaning mechanism 400, a status monitoring mechanism 300, and a controller. The main body of the electrolytic cell 100 is used to contain the electrolyte and support various mechanisms; The rotating anode mechanism 200 is located inside the electrolytic cell body 100 and includes a multi-faceted anode that rotates with the rotating shaft and a stepper motor 230 for driving the rotating shaft. The fixed cathode mechanism 500 consists of multiple cathode plates 510 fixed on the inner wall of the electrolytic cell body 100, and forms an array around the rotating anode mechanism 200. The physical cleaning mechanism 400 is fixedly installed on the inner wall of the electrolytic cell body 100 and forms a scraping engagement with the rotation path of the multi-faceted anode. The status monitoring mechanism 300 is installed on the side wall of the electrolytic cell body 100 and is used to collect surface images of the multi-faceted anode. The controller is electrically connected to the stepper motor 230 and the status monitoring mechanism 300, respectively, and is used to control the rotation of the stepper motor 230 based on the acquired surface image.

[0019] This embodiment provides an anti-scaling sodium hypochlorite preparation device. During the electrolytic preparation of sodium hypochlorite, scale inevitably forms on the anode surface. This scale hinders the flow of current, reduces electrolysis efficiency, and may even lead to electrode passivation and failure in severe cases. Existing technologies typically employ timed acid washing or manual cleaning, which not only interrupts production but may also damage the electrode coating due to improper acid washing. This embodiment of the anti-scaling sodium hypochlorite preparation apparatus addresses this issue through the coordinated operation of various mechanisms. The electrolytic cell body 100 provides a closed reaction environment and mounting base for all components. The rotating anode mechanism 200 can rotate multiple anode working surfaces, transferring the scaled surface out of the electrolysis zone. The fixed cathode mechanism 500, together with the rotating anode surface, constitutes the core electric field structure required for the electrolysis reaction. When scale forms on the anode surface, the status monitoring mechanism 300 can acquire real-time image information of the surface condition. The controller receives this image information, analyzes and judges it, and then drives the rotating anode mechanism 200 to rotate. During rotation, the physical cleaning mechanism 400 scrapes and cleans the scaled anode surface. This overall design enables the apparatus to achieve online monitoring and automated cleaning of anode scale without interrupting the electrolysis process, maintaining production continuity and the stability of electrolysis efficiency. The controller can specifically use Microchip Technology's PIC32 series microcontroller or Siemens S7-200SMART series programmable logic controller as its core, with sufficient computing power and I / O interfaces; the stepper motor 230 can be Mingzhi's MS17HD series stepper motor 230 to provide precise angle control.

[0020] The multifaceted anode of the rotating anode mechanism 200 is a regular hexagonal prism anode 220, with a catalytic coating on each of its six sides; the stepper motor 230 is used to precisely drive the rotating shaft to rotate in 60-degree increments.

[0021] In this embodiment, the multifaceted anode of the rotating anode mechanism 200 is specifically embodied as a regular hexagonal prism anode 220. The regular hexagonal prism shape was chosen because its six flat sides can serve as independent working surfaces, and its processing is relatively simple. All six sides are coated with a ruthenium-iridium oxide catalytic layer, which is a highly efficient catalyst for the electrolytic generation of sodium hypochlorite. A stepper motor 230 is connected to the rotating shaft of the rotating anode mechanism 200. This connection is designed to transmit precise angular displacement. This connection can be achieved through couplings, such as flexible couplings or mortise couplings, which allow for a certain degree of shaft alignment error, protecting the motor and the rotating shaft. The stepper motor 230 precisely drives the rotating shaft to rotate in 60-degree increments. This angle ensures that one side of the regular hexagonal prism anode 220 is replaced by a completely new, clean side. This design ensures that after each cleaning switch, a working surface in a consistent state is used in the electrolysis process, thereby guaranteeing the stability of electrolysis conditions and the uniformity of product quality.

[0022] The status monitoring mechanism 300 includes a sealed observation window 310 horizontally inserted from the side wall of the electrolytic cell body 100, a miniature camera probe 320 disposed inside the sealed observation window 310, and a planar light source 330 surrounding the miniature camera probe 320; the lens of the miniature camera probe 320 is vertically downward focused on the surface of the multifaceted anode directly below it.

[0023] In this embodiment, the structure of the status monitoring mechanism 300 is specifically defined. The sealed observation window 310 is preferably made of quartz glass tube, with one end closed and the other end connected to the side wall opening of the electrolytic cell body 100 through a flange structure. The flange is used to press the sealing gasket to ensure that the electrolyte does not leak. The miniature camera probe 320 is installed inside the sealed observation window 310. This installation method allows it to penetrate deep into the electrolytic cell, close to the anode surface, while being completely isolated from the corrosive electrolyte. The miniature camera probe 320 can specifically be an industrial endoscope probe of model HVS-CMOS3100, whose built-in 90-degree swivel prism allows its lens to focus vertically downwards. This arrangement allows the horizontally mounted probe to observe the anode working surface directly below; the planar light source 330 is a ring-shaped LED light strip surrounding the lens of the camera probe; this light source arrangement can provide uniform and shadow-free illumination to the anode surface, eliminating errors caused by uneven reflection or shadow interference to the image recognition algorithm, and providing high-quality raw image data for the subsequent controller to perform accurate calculation of scale coverage.

[0024] The physical cleaning mechanism 400 includes a fixed bracket and a cleaning brush; the cleaning brush is positioned such that its side edges can scrape across the bristles of the cleaning brush when the multi-faceted anode rotates.

[0025] In this embodiment, the specific structure of the physical cleaning mechanism 400 and its cooperation with the multifaceted anode are clearly defined; the fixing bracket is made of corrosion-resistant material such as Hastelloy and is firmly installed at a specific position on the inner wall of the electrolytic cell by bolts; the cleaning brush consists of hard bristles fixed on the brush holder, and the bristle material is preferably polyetheretherketone, which has sufficient hardness to scrape off scale and excellent chemical corrosion resistance; the installation position of the cleaning brush is precisely set, and its radial position makes the distance between the bristle tip and the anode rotation center slightly smaller than the distance from the vertex of the regular hexagonal prism anode 220 to its geometric center; this ingenious geometric configuration ensures that when the regular hexagonal prism anode 220 rotates, the side edge that is about to leave the cleaning area can closely adhere to and powerfully scrape over the bristles of the cleaning brush; in this way, during the rotation of the anode, the scale that has been loosened by electrochemical methods can be effectively and piece by piece peeled off from the anode surface by physical means, achieving efficient mechanical cleaning.

[0026] Example 2

[0027] Please see Figure 6 A method for preparing anti-scaling sodium hypochlorite, comprising: The controller collects and generates a set of current status data, which is defined as including the anode surface image obtained by the status monitoring unit 300 and the operating voltage obtained by the electrolytic power supply. The controller makes collaborative cleaning decisions based on current status data and preset cleaning trigger conditions. The collaborative cleaning decisions are used to generate cleaning instructions. The cleaning trigger conditions are defined as a logical relationship satisfied by one or more visual scaling features generated by the anode surface image and electrical passivation features generated by the operating voltage. The controller executes a cleaning command, which first instructs the electrolytic power supply to apply a reverse current pulse to the currently working anode surface, and then instructs the stepper motor 230 to drive the rotating anode mechanism 200 to rotate by a preset angle to complete the switching of the working surface. The reverse current pulse works by using the gas generated by the electrochemical reaction to physically loosen the scale. Specifically, when a reverse voltage is applied, water undergoes a reduction reaction on the electrode surface, producing tiny hydrogen bubbles. These bubbles form at the interface between the scale and the anode coating, and their expansion force acts like a miniature explosive, effectively peeling the firmly attached scale layer from the anode surface, thus preparing it for subsequent mechanical scraping.

[0028] This embodiment provides a method for preparing anti-scaling sodium hypochlorite. The method is executed by a controller, which collects and integrates a set of current state data through its data interface. This data is multi-dimensional, containing two key information sources: first, real-time images of the anode surface captured by the miniature camera probe 320 of the state monitoring mechanism 300; and second, real-time operating voltage feedback from the sensors of the electrolysis power supply. Based on this set of state data containing visual and electrical information, the controller compares and performs logical operations with internally preset cleaning trigger conditions to make a collaborative cleaning decision. This decision-making process does not simply rely on a single parameter, but comprehensively analyzes visual scaling characteristics and electrical passivation characteristics to determine the true health condition of the current anode surface and the necessity of cleaning. Once the decision indicates that cleaning is required, the controller generates and issues a series of cleaning commands. The sequence in which the controller executes these commands is carefully designed: controlling the electrolysis power supply to apply a brief reverse high-current pulse to the currently working anode surface. The function of this pulse is to rapidly electrolyze a small amount of hydrogen gas at the interface between the scale and the anode coating. The expansion force of the gas loosens the firmly attached scale layer. The controller then sends a command to the stepper motor 230, driving the rotating anode mechanism 200 to precisely rotate by a preset angle, such as 60 degrees. During this rotation, the loosened anode surface passes through the physical cleaning mechanism 400, where the scale is thoroughly scraped off. Simultaneously, a clean, new working surface is switched to the electrolysis position. This method combines electrochemical loosening with mechanical scraping, achieving efficient and thorough online cleaning.

[0029] The visual scaling characteristic is the scaling coverage rate, which is obtained by the controller after binarizing the anode surface image; the electrical passivation characteristic is the voltage increment value, which is obtained by the controller calculating the difference in operating voltage at two different acquisition time points. The input to this processing flow is a raw image of the anode surface from a miniature camera probe 320. Step 1: The controller performs grayscale processing on the image to remove color information. Step 2: Using a preset brightness threshold, for example, a brightness calibration value based on a scale-free state, all pixels in the image are binarized. Pixels above the threshold are identified as scale areas (white), while those below or equal to the threshold are considered clean areas (black). Step 3: The controller counts the total number of white pixels and calculates their ratio to the total number of pixels on the anode working surface in the image, ultimately outputting the percentage of scale coverage.

[0030] In this embodiment, the features used for cleaning decisions are specifically defined. Visual scaling features are quantified as scaling coverage rate. The acquisition process is as follows: After receiving the anode surface image collected by the status monitoring mechanism 300, the controller starts its internal image processing algorithm. This algorithm first performs binarization processing on the image based on a preset brightness threshold. Since the clean ruthenium-iridium coating surface is dark in color, while the generated scale is light in color, pixels above the threshold are identified as scaling areas (white), and pixels below the threshold are clean areas (black). By statistically analyzing the ratio of the total number of white pixels to the total number of pixels in the anode working surface area of ​​the image, the controller can calculate an accurate scaling coverage percentage. Simultaneously, electrical passivation features are quantified as voltage increment values. The acquisition process is as follows: The controller records the operating voltage value at the time of the last data acquisition in its internal memory and reads the operating voltage value at the current moment. By calculating the difference between the voltage values ​​at these two different time points, the voltage increment value is obtained. This increment value intuitively reflects the degree of increase in the total system resistance due to scaling and other factors within a certain time interval. The abstract concepts of scaling and electrical properties are transformed into concrete, calculable values, providing a data foundation for subsequent complex logical judgments.

[0031] The logical relationship of the cleaning trigger condition includes one of the following judgments: The time change rate of scale coverage is compared with the time change rate of operating voltage, and the calculated visual-electrical feature deviation exceeds the first preset threshold. The voltage increment value is compared with the scale coverage increment value, and the calculated scale voltage sensitivity factor exceeds the second preset threshold. The first preset threshold is a critical value used to quantify the abnormal difference between the visual scaling growth rate and the electrical passivation rate. Its value setting should be based on a large amount of experimental data to effectively identify special scale types that are transparent or difficult to detect visually but have a huge impact on voltage, such as silicate scale. The second preset threshold is a critical value used to quantify the impact of newly formed scale per unit area on system voltage. Its value should be set based on the resistivity of typical scale to effectively identify malignant scale that, even if it covers a small area, has a dense structure and extremely high resistivity, thereby achieving more precise preventive maintenance.

[0032] In this embodiment, the core logical relationship of collaborative cleaning decision-making is explained in detail. It introduces two advanced diagnostic parameters to deal with complex scaling conditions; the first logical judgment introduces the visual-electrical feature deviation. The input sources for this calculation logic are continuously acquired anode surface image data and operating voltage data; the process is as follows: Step 1: The controller calculates the visual fouling growth rate, which is the difference between the current fouling coverage rate and the previous fouling coverage rate divided by the time interval; Step 2: The controller calculates the electrical passivation rate, which is the difference between the current operating voltage and the previous operating voltage divided by the same time interval; Step 3: After standardizing the two rates, the absolute difference is calculated, and the visual-electrical feature deviation is output. The controller's derivation process is as follows: Within its calculation cycle, it calculates two rates in parallel: the visual scaling growth rate is obtained by comparing the current and previous scaling coverage and the time interval; the electrical passivation rate is obtained by comparing the current and previous operating voltage and the same time interval. Normally, scaling should be accompanied by a corresponding increase in voltage, and the two rates are correlated. However, if a transparent but highly resistive film, such as silicate scale, appears, the camera may not be able to effectively detect the increase in its coverage area, resulting in a very low visual scaling growth rate, while the electrical passivation rate increases significantly due to the surge in resistance. The controller standardizes these two rates and calculates their absolute difference to obtain a deviation factor. When this deviation factor exceeds a first preset threshold set to handle such special operating conditions, the controller determines that a malignant scaling failure has occurred due to visual detection failure and immediately triggers cleaning. The second logical judgment introduces a scaling voltage sensitivity factor. The input sources for this calculation logic are continuously acquired anode surface image data and operating voltage data. The process is as follows: Step 1: The controller calculates the voltage increment value, which is the difference between the current operating voltage and the previous operating voltage; Step 2: The controller calculates the scale coverage increment value, which is the difference between the current scale coverage rate and the previous scale coverage rate; Step 3: The controller divides the voltage increment value by the scale coverage increment value and finally outputs the scale voltage sensitivity factor. The derivation process is as follows: Within a calculation cycle, the controller divides the voltage increment by the scale coverage increment within the same cycle. This ratio reflects the actual impact of newly formed scale per unit area on the system voltage. Some scale has a loose structure and has little impact on voltage; others have a dense structure, which can cause a significant voltage increase even if the coverage area is small. When the sensitivity factor calculated by the controller exceeds the calibrated second preset threshold, it means that the currently generated scale has a severe impact on electrolysis efficiency, and cleaning must be carried out immediately even if the total coverage is not high. These two judgment logics make cleaning decisions more intelligent, enabling the identification of different types and properties of scale and achieving more precise preventive maintenance.

[0033] The logical relationship of the cleaning trigger conditions also includes one of the following insurance judgments: The absolute value of the scale coverage exceeds a preset coverage upper limit threshold; The preset coverage upper limit threshold is a safety assurance threshold. Its value, such as 80%, is designed to prevent excessive scale buildup, which may be difficult to remove effectively by conventional electrochemical-mechanical synergistic cleaning methods, thus ensuring system reliability. The absolute value of the operating voltage exceeds the upper voltage threshold set based on the initial operating voltage after the end of the previous cleaning process; This voltage upper limit threshold is an absolute safety protection threshold used to monitor system overload or abnormality caused by any reason. Its value can be set to 10% above the initial operating voltage. When the operating voltage exceeds this value, the system will immediately trigger cleaning to prevent potential equipment damage.

[0034] In this embodiment, to ensure system stability and safety, two additional safety judgment logics are added in addition to the core decision logic. The first safety judgment is based on the absolute value of the scale coverage rate. If the aforementioned deviation or sensitivity factor does not meet the conditions for triggering cleaning, but the total scale coverage rate on the anode surface continues to accumulate and exceeds a preset coverage upper limit threshold, such as 80%, the controller will also forcibly trigger the cleaning and regeneration process. The purpose of setting this condition is to prevent the scale layer from accumulating too thickly or becoming too firmly attached. At this point, even if its resistivity is not high, it may become difficult to remove effectively through the standard electrochemical-mechanical synergistic process, thus posing a potential risk to the system. The second safety judgment is based on the absolute value of the operating voltage. This judgment logic monitors the total operating voltage and compares it with the stable operating voltage value recorded after the previous cleaning process ended and the equipment resumed normal electrolysis, as well as the initial value. Regardless of the scale coverage or changes in other parameters, if the current operating voltage rises abnormally from the initial value for any reason and exceeds the set upper limit threshold (e.g., 10% increase from the initial value), the controller will immediately trigger the cleaning and regeneration process. This condition serves as the ultimate safety guarantee, enabling the handling of sudden or unexpected conditions that may lead to system overload or damage, thus ensuring the absolute reliability of the device's operation.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A scale-preventing sodium hypochlorite preparation device, characterized by: The electrolytic cell comprises an electrolytic cell body (100), a rotating anode mechanism (200), a fixed cathode mechanism (500), a physical cleaning mechanism (400), a state monitoring mechanism (300), and a controller. The electrolytic cell body (100) is used for containing electrolyte and bearing each mechanism. The rotating anode mechanism (200) is arranged in the electrolytic cell body (100) and comprises a multi-surface anode rotating with a rotating shaft and a stepping motor (230) for driving the rotating shaft. The fixed cathode mechanism (500) is composed of a plurality of cathode plates (510) fixed on the inner wall of the electrolytic cell body (100) and forms an array around the rotating anode mechanism (200). The physical cleaning mechanism (400) is fixedly arranged on the inner wall of the electrolytic cell body (100) and is in scraping cooperation with the rotating path of the multi-surface anode. The state monitoring mechanism (300) is arranged on the side wall of the electrolytic cell body (100) and is used for collecting the surface image of the multi-surface anode. The controller is electrically connected with the stepping motor (230) and the state monitoring mechanism (300) respectively and is used for controlling the rotation of the stepping motor (230) according to the collected surface image.

2. A scale-inhibiting sodium hypochlorite preparation apparatus according to claim 1, characterized in that: The multi-surface anode of the rotating anode mechanism (200) is a regular hexagonal prism anode (220) and each side surface of the regular hexagonal prism anode (220) is provided with a catalytic coating; and the stepping motor (230) is used for accurately driving the rotating shaft to rotate at a stepping angle of 60 degrees each time.

3. A scale resistant sodium hypochlorite generating device according to claim 1, characterized in that: The state monitoring mechanism (300) comprises a sealed observation window (310) horizontally inserted from the side wall of the electrolytic cell body (100), a miniature camera probe (320) arranged in the sealed observation window (310), and a planar light source (330) surrounding the miniature camera probe (320); and the lens of the miniature camera probe (320) is vertically focused on the surface of the multi-surface anode directly below the miniature camera probe (320).

4. A scale resistant sodium hypochlorite generating device according to claim 1, characterized in that: The physical cleaning mechanism (400) comprises a fixed support and a cleaning brush; and the installation position of the cleaning brush is set so that the side surface edge of the multi-surface anode can scrape the bristles of the cleaning brush when the multi-surface anode rotates.

5. A method for the production of scale-inhibiting sodium hypochlorite, characterized in that The method is based on the anti-fouling sodium hypochlorite preparation device of any one of claims 1 to 4, comprising: The controller collects and generates a set of current state data, which is defined as including the anode surface image obtained by the state monitoring mechanism (300) and the working voltage obtained by the electrolysis power supply; The controller makes a cooperative cleaning decision based on the current state data and a preset cleaning trigger condition, which is defined as a logical relationship satisfied by one or more visual fouling features generated from the anode surface image and electrical passivation features generated from the working voltage, to generate a cleaning instruction; The controller executes the cleaning instruction to first instruct the electrolysis power supply to apply a reverse current pulse to the currently working anode surface, and then instruct the stepping motor (230) to drive the rotating anode mechanism (200) to rotate by a preset angle to complete the working surface switching.

6. A method of making a scale-inhibiting sodium hypochlorite according to claim 5, characterised in that: The visual fouling feature is a fouling coverage, which is obtained by binarizing the anode surface image and then counting the binarized image by the controller; The electrical passivation feature is a voltage increment value, which is obtained by calculating the difference between the working voltage at two different acquisition time points by the controller.

7. A method of making a scale-inhibiting sodium hypochlorite according to claim 6, characterised in that: The logical relationship of the cleaning trigger condition includes one of the following judgments: The time rate of change of the fouling coverage is compared with the time rate of change of the working voltage, and the visual-electrical feature deviation calculated exceeds a first preset threshold; The voltage increment value is compared with the increment value of the fouling coverage, and the fouling voltage sensitivity factor calculated exceeds a second preset threshold.

8. A method of making a scale-inhibiting sodium hypochlorite according to claim 6, characterized in that: The logical relationship of the cleaning trigger condition also includes one of the following safety judgments: The absolute value of the fouling coverage exceeds a preset upper limit threshold of the coverage; The absolute value of the working voltage exceeds a voltage upper limit threshold set based on the initial working voltage after the last cleaning process.

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