An acidic electrolytic oxidizing water generator for stably controlling water quality and a preparation method thereof

Abstract

This invention discloses an acidic oxidizing potential water generator and its preparation method for stable water quality control, belonging to the field of disinfection equipment technology. The device is designed with an inlet module, a brine preparation module, a mixing and control module, an electrolysis module, and a control system. Its core lies in employing a high-precision electric proportional control valve and a millisecond-level PID algorithm to achieve constant pressure and constant flow control of the inlet water flow. The brine preparation module uses a solid natural melting structure combined with closed-loop liquid level control, enabling long-term maintenance with a single salt addition lasting for six months. A built-in water quality prediction model based on electrolysis current (fma) is incorporated, using a specific algorithm formula to calculate pH, ORP, and available chlorine content in real time, achieving "soft measurement" and feedforward control of water quality. This solves the problems of high manual operation intensity and raw material concentration fluctuations, ensuring that the effluent water quality stably meets the high standard disinfection requirements of pH 2.5-2.6, ORP 1112-1115mV, and available chlorine 50-55mg / L.

Description

Technical Field

[0001] This invention relates to the field of acidic oxidizing potential water preparation equipment, specifically to an acidic oxidizing potential water generator capable of precisely and stably controlling the quality of the effluent. Background Technology

[0002] Acidic electrolyzed water has a strong and broad-spectrum disinfection and sterilization effect, leaves no residue, and is environmentally friendly. It is widely used in many fields such as medical treatment, food processing, and tableware disinfection. The disinfection effect of acidic electrolyzed water is closely related to its water quality indicators (such as pH value, oxidation-reduction potential, and available chlorine content). Therefore, ensuring the stability and accuracy of the water quality of the generator output is a core requirement of equipment design.

[0003] Currently available acidic oxidation potential water generators have many shortcomings in water quality control, mainly in the following aspects: (1) Poor stability of water inlet control: Existing equipment generally uses manual valves to control the water inlet. When the water inlet pressure or water source flow fluctuates, it is impossible to adjust the valve opening in time, resulting in unstable water volume entering the electrolysis system. Fluctuations in water inlet parameters directly cause disturbances in the electrolysis process, resulting in large fluctuations in the quality of the effluent, making it difficult to meet the disinfection requirements, and in severe cases, it can lead to a significant reduction in the disinfection effect.

[0004] (2) The brine preparation method is cumbersome and risky: Existing equipment mostly requires manual periodic addition of salt to the salt dissolving device, and the salt is dissolved by forced stirring or water flushing. This method requires operators to add salt 2-3 times a week, which not only increases the frequency of manual operation and labor costs, but also poses many risks: during the salt addition process, salt particles are easy to fall into the equipment or onto the ground. Salt particles that fall into the equipment can corrode equipment parts and accelerate equipment aging; salt particles that fall onto the ground can cause environmental corrosion and safety hazards. At the same time, it is difficult to accurately control the brine concentration when adding salt manually, which further affects the electrolysis effect. The solid natural melting technology of the present invention can achieve a one-time salt addition for about 6 months of use, completely solving the above problems.

[0005] (3) Insufficient process monitoring and control: Some equipment lacks real-time monitoring and closed-loop control of key parameters (such as water flow rate, pressure, electrolytic cell temperature, etc.) during the electrolysis process, and cannot respond to parameter changes in a timely manner. This makes it difficult to meet the strict requirements of diaphragm electrolyzers for stable influent and stable mixing of electrolytic dosage, resulting in insufficient electrolysis and poor stability of effluent water quality.

[0006] (4) Lack of visualization of operating status and safety assurance: Most existing equipment does not have a comprehensive display and alarm system for operating parameters. Operators cannot intuitively grasp the operating status of each component of the equipment and key water quality indicators. When abnormalities occur in the equipment (such as excessively high temperature of the electrolytic cell, abnormal pressure, etc.), they cannot be detected and dealt with in time, which can easily lead to equipment damage or substandard water quality.

[0007] (5) Lagging water quality testing: Existing equipment relies on end electrode testing, which results in delayed feedback. Furthermore, the electrodes are prone to contamination, require frequent calibration, have short lifespans, and are costly to maintain.

[0008] Therefore, developing an acidic oxidizing potential water generator that can achieve stable control of influent, simplify the brine preparation process, enhance process monitoring and regulation, and ensure operational safety is of great significance for improving the preparation quality and application effect of acidic oxidizing potential water. Summary of the Invention

[0009] To address the aforementioned problems, this invention provides an acidic oxidation potential water generator for stable water quality control.

[0010] It includes a water inlet module, a brine preparation module, a mixing and control module, an electrolysis module, a monitoring and display module, and a control system connected in sequence.

[0011] Specifically, the water inlet module includes a water inlet pipeline and a high-precision electric proportional control valve, which is electrically connected to the control system.

[0012] Specifically, the brine preparation module includes a salt tank and a salt dissolving device.

[0013] Specifically, the salt dissolving device adopts a solid natural melting structure, and a liquid level sensor is installed inside the salt tank.

[0014] Specifically, the hybrid control module includes a mixing chamber, a three-way solenoid valve, and a flow meter.

[0015] Specifically, the electrolysis module includes a diaphragm electrolyzer and a temperature sensor.

[0016] Specifically, the monitoring and display module includes a display screen, which is electrically connected to the control system.

[0017] Specifically, the control system has a built-in millisecond-level PID adjustment algorithm, which is used to adjust the opening of the high-precision electric proportional control valve according to the feedback signal of the flow meter, so as to stabilize the inlet water flow at the set value. Specifically, the control system is configured to: calculate water quality parameters based on the current signal collected from the electrolysis module using a pre-stored water quality prediction model, and adjust the influent module and / or brine preparation module and / or mixing control module based on these parameters.

[0018] Specifically, the water inlet module also includes a main water inlet solenoid valve and a servo motor.

[0019] Specifically, the servo motor drives a high-precision electric proportional control valve.

[0020] Specifically, the brine preparation module also includes a brine tank water replenishment solenoid valve and a filter screen.

[0021] Specifically, the filter screen is installed at the brine outlet at the bottom of the brine tank.

[0022] Specifically, the salt dissolving device also includes an inclined guide plate disposed at the bottom of the salt tank.

[0023] Specifically, the salt tank is equipped with a salt filling port on the top.

[0024] Specifically, the hybrid control module also includes a pressure sensor.

[0025] Specifically, the pressure sensor is located at the inlet of the mixing chamber.

[0026] Specifically, the electrolysis module also includes a current transformer, an acid water supply pump, and an alkaline water supply pump.

[0027] Specifically, the current transformer is used to acquire the electrolytic current signal fma.

[0028] Specifically, the electrolysis module also includes an alkali water recovery pipeline.

[0029] Specifically, one end of the alkali water recovery pipeline is connected to the alkali water outlet of the diaphragm electrolyzer. The other end is connected to an external recovery device, and a manual regulating valve is installed on the pipeline.

[0030] Specifically, the monitoring and display module also includes an acid-base flow meter, an acid water pressure sensor, and an alkaline water pressure sensor.

[0031] Specifically, the control system includes a PLC controller and an alarm unit.

[0032] Specifically, the alarm unit includes an audible and visual alarm.

[0033] Specifically, the water inlet module is equipped with a flow meter with an accuracy of ±0.5%-1% FS and an electric valve with an accuracy of ±0.5°.

[0034] Specifically, the PLC controller has a built-in millisecond-level PID control algorithm, which is used to quickly adjust the opening of the electric valve when the machine is turned on or when the flow fluctuates, so as to stabilize the inlet water flow at the set value of 5L / min.

[0035] Specifically, the control system incorporates a water quality prediction model based on electrolysis current.

[0036] Specifically, the model includes the following algorithm formulas: pH calculation formula: pH = 0.2 × (fma − 25) / 3 + 2.4 ORP calculation formula: ORP=(2*fma+3310) / 3 Formula for calculating available chlorine: Available chlorine = 7 × (fma−25) / 7 + 61 Specifically, fma is the set current value of the electrolysis power supply.

[0037] Specifically, the PLC calculates fma by reading the current transmitter signal and adjusts the parameters of the water inlet module or brine preparation module in reverse according to the calculation result to maintain stable effluent water quality.

[0038] Specifically, the reverse regulation uses the current value as the core feedback parameter. With the influent flow rate fixed at 5L / min, the current is adjusted by regulating the brine mixing concentration (controlled by a peristaltic pump) to ensure stable water quality. The brine naturally dissolves, controlling its concentration to remain stable. The PLC controller judges the system status based on the current feedback value. The current value directly determines the electrolysis effect, thus affecting pH, ORP, and available chlorine. When the current is too high: the peristaltic pump is adjusted to reduce the amount of brine added, lowering the brine mixing concentration. When the current is too low: the peristaltic pump is adjusted to increase the amount of brine added, raising the brine mixing concentration.

[0039] A method for preparing an acidic oxidizing potential water generator.

[0040] Includes the following steps: S1. Intelligent water inlet: The control system controls the opening degree of the high-precision electric proportional control valve based on the feedback signals from the flow meter and pressure sensor.

[0041] S2. Natural salt dissolution and replenishment: The solid salt in the salt tank dissolves naturally to form saturated brine. The level sensor monitors the level, and the control system controls the solenoid valve for replenishing water in the salt tank.

[0042] S3. Dynamic mixing: The three-way solenoid valve adjusts the ratio of raw water to brine, which are then mixed in the mixing chamber to form an electrolyte.

[0043] S4. Steady-state electrolysis: The mixed solution enters the diaphragm electrolyzer, the current transformer collects the current signal, the acid water supply pump and the alkaline water supply pump output the product, and the control system calculates the water quality parameters in real time through the built-in water quality prediction model.

[0044] S5. Closed-loop feedback control: If the calculated water quality parameters deviate from the target range, the control system adjusts the amount of brine added to change the electrolysis current, so as to stabilize the effluent water quality.

[0045] S6. Monitoring and Alarm: The water quality testing unit detects pH, ORP and available chlorine content, and transmits the data to the display screen; in case of abnormality, the PLC controller triggers an alarm.

[0046] Specifically, step S1 includes: S11. Dynamic flow compensation: If the flow rate deviates from 5L / min, the PLC controller adjusts the electric valve in milliseconds and monitors the flow rate changes until it stabilizes.

[0047] S12. Water quality algorithm prediction: Collect real-time current fma and use formulas to calculate theoretical pH, ORP and available chlorine value.

[0048] S13. Feedback Adjustment: If the calculated value deviates from the target range (pH 2.5-2.6, ORP 1112-1115mV, available chlorine 50-55mg / L), the PLC controller adjusts the brine replenishment solenoid valve or electrolysis current to achieve closed-loop control.

[0049] It has the following beneficial effects: (1) This invention abandons the online pH / ORP / available chlorine detection electrodes that traditional equipment relies on, avoiding the inherent defects of electrodes being easily contaminated, requiring frequent calibration, having a short service life, and having delayed detection results (seconds). It achieves water quality feedforward control through electrolysis current signals (milliseconds), which greatly improves the system response speed and control accuracy.

[0050] (2) Precise and stable water inlet control with fast response: A high-precision electric proportional control valve (accuracy ±0.5°) is used in conjunction with a flow meter with an accuracy of ±0.5%-1% FS. Through the millisecond-level PID adjustment algorithm built into the Siemens PLC, closed-loop control of the water inlet flow is achieved. For the rated water inlet flow of 5L / min set for the electrolyzer, the system can quickly adjust the valve opening in milliseconds when starting up or detecting flow fluctuations, and quickly compensate for the flow deviation. This high-precision dynamic compensation mechanism effectively overcomes the problem of unstable concentration caused by fluctuations in water inlet pressure in traditional equipment, and ensures the stability of the water inlet environment of the electrolyzer.

[0051] (3) Convenient brine preparation and precise concentration control: The system employs a solid natural melting technology combined with closed-loop water replenishment control. A level sensor monitors the brine tank status in real time, and a three-way solenoid valve automatically switches water replenishment to ensure the solid salt is always in optimal wetting condition. The system uses a PLC to adjust the opening frequency of the brine tank water replenishment solenoid valve in a closed loop based on the inlet water flow signal, maintaining the mixed solution salt concentration at the optimal 1‰ required by the electrolyzer. This design not only achieves a long-term maintenance cycle of stable use for 6 months after a single salt addition, significantly reducing labor costs, but also fundamentally ensures the consistency of the electrolytic raw material concentration.

[0052] (4) Highly efficient and thorough electrolysis, accurate water quality prediction: Based on the requirement of 1‰ solution concentration in the electrolytic cell, the high efficiency of the electrolysis process is ensured by precisely controlling the influent flow and the stability of the salt concentration. The produced acidic oxidizing potential water stably meets the high-level disinfection standards of pH 2-3, ORP greater than 1100mV, and available chlorine content of 50-70mg / L. More importantly, this invention innovatively introduces a water quality prediction model based on electrolysis current, using the formulas (pH=0.2×(fma−25) / 3+2.4, ORP=(2*fma+3310) / 3, available chlorine=7×(fma−25) / 7+61) to calculate the water quality in real time. This model is based on the real-time current fma detected by the current transformer, which can quickly and accurately reflect the water quality status, realizing the transformation from "passive detection" to "active prediction", and significantly improving the predictability and accuracy of water quality control.

[0053] (5) The system operates safely and reliably, with intelligent feedback regulation capabilities: it links and regulates three data points—flow rate, salt concentration, and electrolysis current—in a coordinated manner. When the concentration of the mixed brine changes slightly, the electrolysis current will respond first. The control system monitors the current changes and the calculation results of the water quality prediction model, and then adjusts the parameters of the influent module or brine preparation module in reverse to achieve self-correction and closed-loop control of the system. Combined with overheat protection from the temperature sensor and audible and visual alarms from the alarm unit, it comprehensively ensures the safety and stability of the equipment during long-term operation, avoiding the risk of water quality exceeding standards due to minor fluctuations.

[0054] (6) The operating status is intuitive and controllable, and the data is traceable: The monitoring and display module displays key data such as influent flow rate, electrolysis current, and pH value, ORP, and available chlorine content based on algorithm prediction on the display screen in real time, so that operators can intuitively grasp the operating status of the equipment and the water quality trend. All data can be printed and recorded to meet the water quality traceability requirements of medical and other fields, and facilitate rapid response and handling of abnormal situations. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0056] Figure 1 This is a schematic diagram of an acidic oxidation potential water generator assembly for stable water quality control according to the present invention. Figure 2 This is a detailed structural principle diagram of an acidic oxidation potential water generator for stable water quality control according to the present invention. Figure labels: Water inlet module (1), brine preparation module (2), mixing and control module (3), electrolysis module (4), monitoring and display module (5), control system (6), water inlet pipeline (7), high-precision electric proportional control valve (8), main water inlet solenoid valve (9), servo motor (10), brine tank (11), salt dissolving device (12), liquid level sensor (13), brine tank water replenishment solenoid valve (14), filter screen (15), guide plate (16), salt inlet (17), brine outlet (18), mixing chamber (19), three-way solenoid valve (20), flow meter (21), pressure Force sensor (22), diaphragm electrolyzer (23), temperature sensor (24), current transformer (25), acid water supply pump (26), alkaline water supply pump (27), alkaline water recovery pipeline (28), external recovery device (29), manual regulating valve (30), acid water outlet (31), alkaline water outlet (32), display screen (33), acid and alkali flow meter (34), acid water pressure detection sensor (35), alkaline water pressure detection sensor (36), PLC controller (37), alarm unit (38), audible and visual alarm (39), water quality detection unit (40). Detailed Implementation

[0057] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0058] The following detailed description of the implementation method of the present invention is in conjunction with the accompanying drawings. The description is only a partial embodiment and not all embodiments. For clarity, representations and descriptions unrelated to the present invention are omitted in the drawings and description.

[0059] To provide a clearer understanding of the technical features, objectives, and beneficial effects of this invention, the following detailed description of the technical solution is provided. Obviously, the described embodiments are only a portion of the embodiments of this invention, not all of them, and should not be construed as limiting the scope of implementation of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the protection scope of this invention.

[0060] Example 1 This example provides an acidic oxidation potential water generator for precise and stable control of water quality.

[0061] In this embodiment, the acidic oxidizing potential water generator includes a water inlet module 1, a brine preparation module 2, a mixing and control module 3, an electrolysis module 4, a monitoring and display module 5, and a control system 6 connected in sequence.

[0062] In this embodiment, the water inlet module 1 includes a water inlet pipe 7 and a high-precision electric proportional control valve 8 installed on the water inlet pipe 7.

[0063] In this embodiment, the high-precision electric proportional control valve 8 is driven by a servo motor 10, and the control accuracy can reach 0.1%. The water inlet pipe 7 is also equipped with a main water inlet solenoid valve 9.

[0064] In this embodiment, the brine preparation module 2 includes a salt tank 11, a salt dissolving device 12 disposed in the salt tank 11, a water replenishment solenoid valve 14 for the salt tank 11, and a liquid level sensor 13.

[0065] In this embodiment, the salt dissolving device 12 adopts a solid natural melting structure, and the salt tank 11 is provided with a salt addition port 17 at the top and a brine outlet 18 at the bottom.

[0066] In this embodiment, the solenoid valve 14 for replenishing water in the salt tank 11 is electrically connected to the control system 6 and is used to automatically replenish the dissolved salt water according to the liquid level in the salt tank 11.

[0067] In this embodiment, the brine outlet 18 is connected to the mixing control module 3.

[0068] In this embodiment, the salt dissolving device 12 also includes a guide plate 16 and a filter screen 15 disposed at the bottom of the salt tank 11.

[0069] In this embodiment, the guide plate 16 is inclined to guide the brine to flow towards the brine outlet 18. In this embodiment, the filter screen 15 is located at the brine outlet 18 to filter out incompletely dissolved salt particles.

[0070] In this embodiment, the mixing control module 3 includes a mixing chamber 19, a three-way solenoid valve 20, a flow meter 21 located at the end of the water inlet pipe 7 and at the inlet of the mixing chamber 19, and a pressure sensor 22.

[0071] In this embodiment, the three-way solenoid valve 20 is connected to the water inlet pipe 7, the water supply port of the brine tank 11, and the mixing chamber 19, respectively, and is used to switch the direction of water flow.

[0072] In this embodiment, the mixing chamber 19 is connected to the water inlet pipe 7 and the brine outlet 18 of the brine preparation module 2, respectively, and is used to mix the inlet water and brine in proportion and then transport them to the electrolysis module 4.

[0073] In this embodiment, the electrolysis module 4 includes a diaphragm electrolytic cell 23, a current transformer 25, an acid water supply pump 26, an alkaline water supply pump 27, a temperature sensor 24 installed on the diaphragm electrolytic cell 23, and an alkaline water recovery pipeline 28.

[0074] In this embodiment, the current transformer 25 is electrically connected to the control system 6 and is used to collect electrolysis current signals.

[0075] In this embodiment, both the acid water supply pump 26 and the alkali water supply pump 27 are electrically connected to the control system 6. In this embodiment, one end of the alkali water recovery pipeline 28 is connected to the alkali water outlet of the diaphragm electrolyzer 23, and the other end is connected to the external recovery device 29.

[0076] In this embodiment, the monitoring and display module 5 includes an acid-base flow meter 34, an acid water pressure sensor 35, an alkaline water pressure sensor 36, a display screen 33, and a water quality detection unit 40.

[0077] In this embodiment, the control system 6 includes a PLC controller 37 and an alarm unit 38. In this embodiment, the alarm unit 38 includes an audible and visual alarm 39.

[0078] In this embodiment, the working principle is as follows: raw water enters through the inlet pipe 7, and the control system 6 controls the opening of the high-precision electric proportional control valve 8 according to the feedback signals of the flow meter 21 and the pressure sensor 22, so as to achieve constant pressure and constant flow control of the inlet water flow.

[0079] The solid salt in the salt tank 11 melts naturally to form saturated brine. The liquid level sensor 13 monitors the liquid level in real time. When the liquid level is lower than the set value, the control system 6 opens the salt tank water replenishment solenoid valve 14 to replenish water. The saturated brine is then filtered through the filter screen 15 and output.

[0080] The three-way solenoid valve 20 adjusts the ratio of raw water to brine, and the two are mixed in the mixing chamber 19 to form an electrolyte.

[0081] The mixture enters the diaphragm electrolytic cell 23 for electrolysis, the current transformer 25 collects the current signal, and the temperature sensor 24 monitors the temperature of the cell.

[0082] The acid water supply pump 26 and the alkaline water supply pump 27 output the electrolysis products, and the alkaline water is discharged or recycled through the alkaline water recovery pipeline 28.

[0083] The water quality detection unit 40 detects the pH value, ORP and available chlorine content of the effluent in real time, and transmits the data to the display screen 33.

[0084] When the temperature, pressure, or flow rate is abnormal, the PLC controller 37 triggers the audible and visual alarm 39.

[0085] Example 2 In this embodiment, for the working condition of a rated inlet water flow rate of 5L / min for the electrolytic cell, the system performs fluid dynamics optimization at the hardware level: the pipe diameter and flow direction of the inlet pipe 7) are simulated and verified to ensure that it has natural flow stability when there is no external interference.

[0086] In this embodiment, a flow meter 21 with an accuracy of ±0.5%-1% FS and an electric proportional control valve 8 with an accuracy of ±0.5° are configured to form a high-precision feedback regulation loop.

[0087] In this embodiment, a millisecond-level PID control algorithm is written in the control system 6 to compare the flow setpoint and the detected value in real time with a sampling period of 10ms. If the flow deviation exceeds ±0.2L / min during startup or operation, the PLC immediately outputs a pulse signal to drive the servo motor 10 to quickly adjust the valve opening. It first makes a large adjustment, and then switches to fine-tuning mode when it approaches the setpoint to quickly stabilize the flow at 5L / min.

[0088] In this embodiment, the liquid level in the salt tank 11 is monitored in real time by the liquid level sensor 13. When the liquid level is lower than the set threshold, the control system 6 automatically opens the salt tank water replenishment solenoid valve 14 to replenish water to the salt tank and ensure that the solid salt is continuously moistened.

[0089] In this embodiment, the system controls the start and stop frequency of the water replenishment solenoid valve through closed-loop logic, and dynamically adjusts the brine replenishment amount in combination with the influent flow data, so that the salt concentration of the mixed solution entering the electrolyzer is stably maintained at the optimal process point of 1‰, which meets the requirements of the electrolysis reaction.

[0090] In this embodiment, a water quality prediction algorithm is innovatively introduced to achieve real-time calculation and feedforward control of the effluent water quality: pH value prediction formula: pH = 0.2 × (fma−25) / 3 + 2.4 ORP prediction formula: ORP = (2 * fma + 3310) / 3 Available chlorine prediction formula: Available chlorine = 7 × (fma−25) / 7 + 61 Where fma is the set current value of the electrolysis power supply (unit: A), which is detected by the current transformer 25 and converted into a 4-20mA signal by the current transmitter and input to the PLC controller 37.

[0091] In this embodiment, the PLC controller 6 reads the fma value in real time, substitutes it into the above formula to calculate the theoretical pH, ORP and available chlorine content, and displays it on the display screen 33 in real time.

[0092] In this embodiment, when the concentration of the mixed brine fluctuates slightly, the electrolysis current fma changes first, and the control system (6) immediately predicts the trend of water quality change through the water quality prediction model.

[0093] In this embodiment, if the calculated value deviates from the target range (pH 2.5-2.6, ORP 1112-1115mV, available chlorine 50-55mg / L), the system automatically adjusts the opening of the high-precision electric proportional control valve 8 or the water replenishment frequency of the salt tank water replenishment solenoid valve 14 in the opposite direction to achieve closed-loop parameter regulation.

[0094] In this embodiment, the temperature sensor 24 monitors the temperature of the electrolytic cell in real time. When the temperature exceeds the limit, an alarm is triggered and the water inlet flow rate is adjusted or the cell is shut down.

[0095] In this embodiment, multiple sensors, such as pressure sensor 22 and acid / alkali flow meter 34, ensure the safe operation of the system.

[0096] In this embodiment, under abnormal conditions, the PLC controller 37 triggers the audible and visual alarm 39 to issue an audible and visual alarm, reminding the operator to handle the situation in a timely manner.

[0097] In this embodiment, the system operates stably under the conditions of 24V DC power supply and electrolysis current of 20-23A.

[0098] In this embodiment, the final produced acidic oxidizing potential water quality is stable and reaches the following level: pH 2.5-2.6; ORP1112-1115mV; Available chlorine 50-55 mg / L; It can operate continuously for more than 370 hours without failure and meets medical-grade disinfection requirements.

[0099] Example 3 As shown in Table 1, this embodiment provides measured data of effluent water quality under different electrolysis currents.

[0100] As shown in Table 1, to verify the accuracy of the control algorithm and the stability of the system, water output tests were conducted at different current levels. The data comparing the set current (fma) with the actual detected water quality were recorded.

[0101] As shown in Table 1, with the increase of the electrolysis current fma, the actual effluent pH value shows a linear decreasing trend, while the ORP value and available chlorine content show a linear increasing trend. The measured data are in high agreement with the algorithm formula proposed in this invention, verifying the feasibility of accurately predicting and controlling water quality through electrolysis current. When the current is stable within a specific range, the equipment can stably produce acidic oxidized potential water that meets high standards. Table 1 The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An acidic oxidation potential water generator for stable water quality control, comprising an inlet module (1), a brine preparation module (2), a mixing and control module (3), an electrolysis module (4), a monitoring and display module (5), and a control system (6) connected in sequence, characterized in that: The water inlet module (1) includes an inlet pipe (7) and a high-precision electric proportional control valve (8), which is electrically connected to the control system (6); the brine preparation module (2) includes a salt tank (11) and a salt dissolving device (12), which adopts a solid natural melting structure, and a liquid level sensor (13) is provided in the salt tank (11); the mixing control module (3) includes a mixing chamber (19), a three-way solenoid valve (20), and a flow meter (21); the electrolysis module (4) includes a diaphragm electrolytic cell (23) and a temperature sensor (24); the monitoring module (5) includes a diaphragm electrolytic cell (23) and a temperature sensor (24); The measurement and display module (5) includes a display screen (33), which is electrically connected to the control system (6); the control system (6) has a built-in millisecond-level PID adjustment algorithm, which is used to adjust the opening of the high-precision electric proportional control valve (8) according to the feedback signal of the flow meter (21) to stabilize the inlet flow rate at the set value; the control system (6) is configured to: calculate the water quality parameters according to the current signal collected from the electrolysis module (4) through the pre-stored water quality prediction model, and adjust the inlet module (1) and / or brine preparation module (2) and / or mixing control module (3) based on the parameters.

2. The acidic oxidation potential water generator for stable water quality control according to claim 1, characterized in that: The water inlet module (1) also includes a main water inlet solenoid valve (9) and a servo motor (10), the servo motor (10) driving a high-precision electric proportional control valve (8); the brine preparation module (2) also includes a brine tank water replenishment solenoid valve (14) and a filter screen (15), the filter screen (15) being located at the brine outlet (18) at the bottom of the brine tank (11).

3. The acidic oxidation potential water generator for stable water quality control according to claim 2, characterized in that: The salt dissolving device (12) also includes an inclined guide plate (16) at the bottom of the salt tank (11), and a salt inlet (17) is provided at the top of the salt tank (11).

4. The acidic oxidation potential water generator for stable water quality control according to claim 1, characterized in that: The mixing control module (3) also includes a pressure sensor (22), which is located at the inlet of the mixing chamber (19); the electrolysis module (4) also includes a current transformer (25), an acid water supply pump (26) and an alkaline water supply pump (27); the current transformer (25) is used to collect the electrolysis current signal fma.

5. An acidic oxidation potential water generator for stable water quality control according to claim 4, characterized in that: The electrolysis module (4) also includes an alkali water recovery pipeline (28), one end of which is connected to the alkali water outlet of the diaphragm electrolyzer (23), and the other end is connected to an external recovery device (29). A manual regulating valve (30) is provided on the pipeline.

6. The acidic oxidation potential water generator for stable water quality control according to claim 1, characterized in that: The monitoring and display module (5) also includes an acid-base flow meter (34), an acid water pressure detection sensor (35), and an alkaline water pressure detection sensor (36); the control system (6) includes a PLC controller (37) and an alarm unit (38), the alarm unit (38) including an audible and visual alarm (39).

7. The acidic oxidation potential water generator for stable water quality control according to claim 1, characterized in that: The water inlet module (1) is equipped with a flow meter with an accuracy of ±0.5%-1% FS and an electric valve with an accuracy of ±0.5°; the PLC controller (37) has a built-in millisecond-level PID adjustment algorithm, which is used to quickly adjust the opening of the electric valve when the machine is turned on or when the flow fluctuates, so as to stabilize the water inlet flow at the set value of 5L / min.

8. The acidic oxidation potential water generator for stable water quality control according to claim 7, characterized in that: The control system (6) incorporates a water quality prediction model based on electrolysis current, and the model includes the following algorithm formulas: pH calculation formula: pH = 0.2 × (fma − 25) / 3 + 2.4 ORP calculation formula: ORP=(2*fma+3310) / 3 Formula for calculating available chlorine: Available chlorine = 7 × (fma−25) / 7 + 61 Wherein, fma is the set current value of the electrolysis power supply; the PLC calculates fma by reading the current transmitter signal and adjusts the parameters of the water inlet module (1) or the brine preparation module (2) in reverse according to the calculation result to maintain the stability of the effluent water quality; the reverse adjustment takes the current value as the core feedback parameter. Under the premise that the water inlet flow rate is fixed at 5L / min, the current is adjusted by adjusting the brine mixing concentration (controlled by the peristaltic pump) to ensure the stability of the water quality. The brine naturally melts and controls its concentration to be stable. The PLC controller (37) judges the system status according to the current feedback value. The current value directly determines the electrolysis effect, and thus affects the pH, ORP and available chlorine; when the current is too high: adjust the peristaltic pump to reduce the amount of brine added and reduce the brine mixing concentration; when the current is too low: adjust the peristaltic pump to increase the amount of brine added and increase the brine mixing concentration.

9. A method for preparing an acidic oxidation potential water generator, comprising the acidic oxidation potential water generator as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. Intelligent water inlet: The control system (6) controls the opening degree of the high-precision electric proportional control valve (8) based on the feedback signals from the flow meter (21) and the pressure sensor (22); S2. Natural salt dissolution and replenishment: The solid salt in the salt tank (11) is naturally dissolved to form saturated brine. The liquid level sensor (13) monitors the liquid level, and the control system (6) controls the salt tank replenishment solenoid valve (14) to replenish water. S3. Dynamic mixing: The three-way solenoid valve (20) adjusts the ratio of raw water to brine, and the mixture is formed in the mixing chamber (19) to form an electrolyte; S4. Steady-state electrolysis: The mixed liquid enters the diaphragm electrolyzer (23), the current transformer (25) collects the current signal, the acid water supply pump (26) and the alkaline water supply pump (27) output the product, and the control system (6) calculates the water quality parameters in real time through the built-in water quality prediction model. S5. Closed-loop feedback regulation: If the calculated water quality parameters deviate from the target range, the control system (6) adjusts the amount of brine added to change the electrolysis current, so as to stabilize the effluent water quality; S6. Monitoring and alarm: The water quality detection unit (40) detects pH, ORP and available chlorine content, and transmits the data to the display screen (33); when there is an abnormality, the PLC controller (37) triggers an alarm.

10. The method for preparing an acidic oxidizing potential water generator according to claim 9, characterized in that, Step S1 includes: S11. Flow dynamic compensation: If the flow rate deviates from 5L / min, the PLC controller (37) adjusts the electric valve in milliseconds and monitors the flow rate change until it stabilizes. S12. Water quality algorithm prediction: Collect real-time current fma, substitute it into the formula to calculate theoretical pH, ORP and available chlorine value; S13. Feedback adjustment: If the calculated value deviates from the target range (pH 2.5-2.6, ORP 1112-1115mV, available chlorine 50-55mg / L), the PLC controller (37) adjusts the brine replenishment solenoid valve or electrolysis current to achieve closed-loop control.

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