Method for realizing dynamic balance of mineral substances in source water based on ion coordinated regulation and control

Abstract

The invention provides a method for realizing dynamic balance of source water minerals based on ion coordinated regulation and control, and belongs to the technical field of water treatment. According to the method, multi-parameter coupling regulation and control are achieved by conducting split-flow pretreatment on source water and building a dynamic synergistic coefficient model, the source water is separated to prepare calcium-magnesium compensation liquid, the ion concentration and the water temperature are monitored in real time, and a synergistic coefficient model fusing ion activity factors and the temperature effect is built; a fuzzy PID controller is used for dynamically analyzing pH fluctuation and collaborative deviation to adjust the injection proportion of compensation liquid, and precise mineralization is achieved by combining turbulence mixing intensity optimization; a closed-loop feedback mechanism and a high-frequency liquid supplementing technology are adopted to quickly correct ion concentration deviation, and the dissolution activity of compensation liquid is differentially regulated and controlled through a reverse temperature difference strategy so as to stabilize pH. According to the method, the ion synergistic effect, dynamic algorithm control and dissolution kinetics optimization are combined, the response speed and balance precision of water quality regulation are improved, and the method is suitable for precise mineral regulation and quality optimization of high-quality drinking water.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and specifically to a method for realizing the dynamic balance of source water minerals based on ion cooperative regulation. Background Art

[0002] Key minerals such as calcium, magnesium ions and bicarbonate in aquatic products are not only important elements for maintaining human health, but also the basis for the unique taste and stability of products. The dynamic balance of mineral components in source water is the core factor determining the quality of aquatic products. The synergistic ratio of calcium and magnesium ions directly affects the taste softness and aftertaste characteristics of aquatic products, while bicarbonate regulates the pH stability through a buffer system and inhibits precipitation. If the mineral concentration shows a dynamic imbalance, it will lead to problems such as turbidity, precipitation, and taste deterioration of the product, and even cause the risk of microbial growth in severe cases. Therefore, in industrial production, it is necessary to master the precise regulation of mineral ions, especially the ability to maintain dynamic balance in the face of fluctuations in source water quality.

[0003] However, traditional ion compensation mostly relies on static ratio methods and cannot respond in real time to the dynamic fluctuations of source water ion concentration. For example, due to the seasonal fluctuations of the source water quality in a certain water source area, the annual change of the Ca²⁺ concentration in its source water reaches ±15%. Most traditional methods use off-line detection and adjustment methods of conventional control algorithms, resulting in hysteresis, the injection amount of the compensation liquid deviating from the actual demand, causing local supersaturation or ion ratio imbalance. The conventional control algorithm has insufficient adaptability to the non-linear response of water quality fluctuations and ion synergistic effects. When the source water composition changes suddenly, it is easy to cause regulation instability, leading to the imbalance of the carbonate system and inducing precipitation, or due to the failure to fully consider the dynamic influence of temperature on ion activity, frequent mineral salting-out phenomena occur during seasonal water quality changes. The existing closed-loop feedback mechanism lacks the ability of multi-parameter cooperative regulation. Usually, it adopts a single ion concentration independent regulation mode, ignoring the combined effects of calcium and magnesium ion ratio, bicarbonate concentration and water temperature, resulting in a deviation between the mineral salt solubility model and the actual working conditions. The imbalance of the synergistic ratio caused by isolating the regulation of a single ion significantly exacerbates the risk of system stability deterioration. In addition, the existing technology does not consider the influence of temperature difference on the dissolution characteristics difference of calcium and magnesium ions, resulting in a slow response during the pH correction process.

[0004] The above technical defects seriously restrict the quality consistency and product qualification rate of aquatic products, and it is urgent to develop a method for realizing the dynamic balance of source water minerals based on ion cooperative regulation to break through the existing technical bottleneck. Summary of the Invention

[0005] To solve the problems in the background art, the present invention provides a method for realizing the dynamic balance of source water minerals based on ion cooperative regulation, including the following steps: S1: Pretreatment and parameter setting: After filtering the source water, it is subjected to split-flow treatment. The first branch of the source water is selectively separated and concentrated for calcium ions and magnesium ions to produce calcium compensation liquid and magnesium compensation liquid, which are respectively stored in the calcium compensation liquid storage tank and the magnesium compensation liquid storage tank. The second branch of the source water is used to detect the concentrations of calcium ions, magnesium ions, and bicarbonate ions and the water temperature in real time, set the target calcium and magnesium ion concentrations and the target pH value, and establish a dynamic coordination coefficient model based on the detection data. S2: Dynamic mineralization regulation: Introduce the pretreated water source into the mineralization reaction tank. When it is detected that the pH fluctuation exceeds the threshold, according to the coordination coefficient deviation and the pH fluctuation value, the injection rates of the calcium compensation liquid and the magnesium compensation liquid are dynamically adjusted through a fuzzy PID controller, and the injection volume of the compensation liquid is calculated respectively. S3: Closed-loop feedback control: Conduct closed-loop detection on the calcium and magnesium ion concentrations of the water body after mineralization. When the concentration deviation exceeds the threshold, calculate the additional amount of the compensation liquid, and adjust the dynamic coordination coefficient, pH deviation, calcium ion concentration, and magnesium ion concentration to be stable within the target range.

[0006] Furthermore, the specific processes of steps S1 - S3 are as follows: S1: Source water pretreatment and target parameter setting, including: S11: Continuously detect the concentration values of 、 、 three key ions in the second branch of the source water at a frequency of 5 seconds / time using the first on-line ion chromatograph; S12: Set the target calcium ion concentration (unit: ppm), the target magnesium ion concentration (unit: ppm), and the target pH value ; S13: Calculate the dynamic coordination coefficient based on the ion detection data, and establish an ion balance model through the following formula: ; In the formula: : Initial coordination coefficient (dimensionless); Source water 、Source water 、Source water : Measured concentrations of calcium, magnesium, and bicarbonate ions in the source water (unit: ppm); : Absolute temperature (unit: K) monitored in real time by the water temperature sensor; : Calcium ion activity adjustment factor (dimensionless); : Magnesium ion activity adjustment factor (dimensionless); : Bicarbonate ion activity adjustment factor (dimensionless); : System activation energy (unit: J / mol); : Universal gas constant (unit: J / (mol·K)); S2: Dynamic mineralization regulation and control, including: S21. Set the pH fluctuation threshold ; Import the pretreated water source into the mineralization reaction tank with a turbulent mixer. When the pH electrode detects that the pH fluctuation exceeds the set threshold , calculate the injection rates of calcium compensation solution and magnesium compensation solution respectively through a fuzzy PID controller, and its operation formula is: ; ; In the formula: 、 : Injection rates of calcium compensation solution and magnesium compensation solution (unit: ); 、 : Dynamic weight coefficients of calcium compensation solution and magnesium compensation solution, and ; : Proportional term reference coefficient (dimensionless); : pH deviation gain coefficient (dimensionless); : Absolute deviation between the measured pH and the target value (dimensionless); : Coefficient of deviation of the synergy coefficient (dimensionless); : Integral term gain coefficient (dimensionless); : Synergy coefficient inhibition factor (dimensionless); : Real-time synergy coefficient (dimensionless); : Preset target synergy coefficient (dimensionless). By comparing the deviation of the real-time synergy coefficient , realize the dynamic adjustment of the compensation solution; : Integral operation of the deviation; S22. Inject calcium compensation solution and magnesium compensation solution respectively through a dual-channel independent control injection pump, and the injection volume of each item is calculated by the following formula: ; ; In the formula: 、 : Injection volumes of calcium compensation solution and magnesium compensation solution (unit: ); : Adjustment time (unit: s); : In the calcium compensation solution Equivalent concentration (unit: ); : In the magnesium compensation solution of the equivalent concentration (unit: ); S3: Closed-loop feedback control, including: S31. Set up a second on-line ion chromatograph at the outlet of the mineralization tank for closed-loop detection of ion concentration. When the detected deviation of calcium or magnesium ion concentration exceeds the threshold value, calculate the additional amount through the following formula: ; ; Where: 、 : The additional volumes of calcium compensation solution and magnesium compensation solution (unit: ); 、 : The deviation of calcium and magnesium ion concentrations (unit: ppm); : The effective volume of the mineralization tank (unit: ); 、 : The storage concentrations of calcium compensation solution and magnesium compensation solution (unit: ); : The pH deviation correction coefficient (dimensionless); S32. Perform high-frequency pulsed liquid addition through a pneumatic diaphragm valve, with the single liquid addition time ≤ 2 seconds, and finally make the finished water meet: ; ; ; ; : The calcium ion concentration deviation threshold value (unit: ppm); : The magnesium ion concentration deviation threshold value (unit: ppm).

[0007] Further, in step S21, when deviates from the target value, increases linearly with the deviation, and the injection ratio of calcium compensation solution is preferentially increased to quickly restore ion balance; when the real-time cooperation coefficient is and are adjusted according to the following formula: ; Where: : Dynamic weight coefficient of calcium compensation solution (dimensionless); : Dynamic weight coefficient of magnesium compensation solution (dimensionless); 0.6: Calcium weight reference adjustment factor (dimensionless); 0.2: Coefficient deviation gain coefficient of synergy (dimensionless); : Preset target synergy coefficient (dimensionless); : Real-time synergy coefficient (dimensionless); : Normalized synergy coefficient deviation (dimensionless).

[0008] Furthermore, in step S22, the greater the concentration deviation, the rotational speed of the turbulent mixer is proportionally increased to strengthen the mixing uniformity and inhibit local precipitation, and is dynamically regulated by the following formula: ; In the formula: : Rotational speed of the turbulent mixer (unit: rpm); 1200: Reference rotational speed (unit: rpm); 0.08: Rotational speed-concentration coupling coefficient (dimensionless); : Absolute deviation between the measured value and the target value of calcium ion concentration (unit: ppm); : Absolute deviation between the measured value and the target value of magnesium ion concentration (unit: ppm); : Allowable deviation threshold of calcium ion concentration (unit: ppm); : Allowable deviation threshold of magnesium ion concentration (unit: ppm).

[0009] Furthermore, in step S22, the injection volume error rate of the dual-channel injection pump is controlled by the following formula: ; In the formula: : Volume error rate of calcium compensation solution (unit: %); : Volume error rate of magnesium compensation solution (unit: %); : Actual injection volume of calcium compensation solution (unit: μL); : Theoretical injection volume of calcium compensation solution (unit: μL); : The actual injection volume of the magnesium compensation solution (unit: μL); : The theoretical injection volume of the magnesium compensation solution (unit: μL); : The injection rate of the calcium compensation solution (unit: μL / s); : The injection rate of the magnesium compensation solution (unit: μL / s); : The adjustment time (unit: s).

[0010] Further, in step S21, when occurs, heat the calcium compensation solution to accelerate dissolution, and at the same time cool the magnesium compensation solution to inhibit the reaction rate, synergistically reducing the pH value; the injection temperatures of the calcium compensation solution and the magnesium compensation solution are regulated according to the following strategy: ; Wherein: : The injection temperature of the calcium compensation solution (unit: °C); : The injection temperature of the magnesium compensation solution (unit: °C); : The real-time water temperature in the mineralization tank (unit: °C); : The pH deviation direction function, takes +1 when takes -1 when 6: The temperature compensation reference value of the calcium compensation solution (unit: °C); 4: The temperature compensation reference value of the magnesium compensation solution (unit: °C).

[0011] The present invention provides a source water mineral dynamic balance adjustment system, which includes: A pretreatment unit, including a quartz sand filter, the outlet of which is divided into a first branch and a second branch through a shunt pipeline. The first branch is connected to a selective ion separation and concentration device for preparing and storing the calcium compensation solution and the magnesium compensation solution in a calcium compensation solution storage tank and a magnesium compensation solution storage tank; the second branch is connected to a first on-line ion chromatograph through a pipeline for real-time detection of the concentrations of calcium, magnesium and bicarbonate ions; a temperature sensor is installed at the outlet of the quartz sand filter to collect the source water temperature signal; the selective ion separation and concentration device includes a cation exchange membrane group and a negative pressure concentration module, and the calcium compensation solution storage tank and the magnesium compensation solution storage tank are respectively provided with temperature control coils to adjust the temperature of the compensation solution through a temperature control module.

[0012] The mineralization reaction tank is equipped with a pH electrode at the top to monitor the pH value inside the tank, a turbulent mixer is installed at the bottom, and the side wall is respectively connected to a calcium compensation liquid injection pipe and a magnesium compensation liquid injection pipe through a Y-shaped mixer; the rotating shaft of the turbulent mixer is connected to a variable-frequency motor, and the rotation speed is dynamically adjusted according to the concentration deviation; The fuzzy PID controller is connected to the first on-line ion chromatograph, temperature sensor, and pH electrode through a data bus, receives ion concentration, water temperature, and pH data, and is built-in with a dynamic cooperation coefficient calculation module and a compensation liquid weight distribution module; The dual-channel injection pump includes a calcium compensation channel and a magnesium compensation channel, which are respectively connected to a calcium compensation liquid storage tank and a magnesium compensation liquid storage tank through corrosion-resistant pipelines; each channel is equipped with a high-precision flowmeter to feedback the actual injection volume to the fuzzy PID controller; The closed-loop feedback unit includes a second on-line ion chromatograph, whose water inlet is connected to the water outlet of the mineralization reaction tank through a sampling pipe to detect the calcium and magnesium ion concentrations in the finished water; a pneumatic diaphragm valve is installed at the liquid supplement port of the mineralization reaction tank to receive the pulse signal of the fuzzy PID controller and execute high-frequency liquid supplement.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the technical path of dynamic model construction, intelligent control integration, closed-loop precision guarantee, robustness enhancement, and dissolution kinetics optimization, the present invention solves the core problems such as isolated parameter adjustment, response hysteresis, and local precipitation in traditional methods, and realizes the comprehensive improvement of mineral balance precision, system stability, and anti-interference ability, specifically manifested in: First, the present invention designs a dynamic cooperation coefficient model with multi-parameter coupling. By integrating multi-dimensional parameters such as calcium, magnesium, bicarbonate ion concentrations, and water temperature, a non-linear cooperation coefficient model is constructed, breaking through the limitations of traditional single-ion concentration control. This model introduces the thermodynamic activation energy and gas constant, accurately quantifies the dynamic influence of temperature on ion activity, and reflects the cooperation characteristics of different ions through differential adjustment factors, enhancing the adaptability of the system to water quality fluctuations. When the seasonal change of the source water ion ratio or temperature mutation occurs, by automatically optimizing the compensation strategy, the risk of carbonate precipitation caused by isolated parameter adjustment is effectively avoided, and the stability of mineral balance is improved.

[0014] Second, the present invention establishes a dynamic fusion mechanism of fuzzy logic and PID control. Aiming at the defect of response hysteresis of traditional control methods during pH mutation, a fuzzy PID controller with cooperation coefficient deviation and pH fluctuation as double input parameters is innovatively designed. Through the dynamic suppression integral gain and weight distribution mechanism, the non-linear cooperative adjustment of the injection rates of calcium and magnesium compensation liquids is realized, reducing the overshoot oscillation phenomenon during the adjustment process, achieving a smooth transition during rapid pH value change, ensuring that the calcium and magnesium ion compensation ratios are highly matched with the real-time water quality requirements, and greatly enhancing the system's ability to suppress sudden interference.

[0015] Thirdly, the present invention designs a closed-loop control architecture for dual-stage detection and high-frequency liquid replenishment, adopts a dual-stage ion chromatography detection system combining pre-inspection in the front stage and closed-loop feedback at the end, and combines the high-frequency pulse liquid replenishment technology of pneumatic diaphragm valves to construct a real-time error correction system, effectively shortening the lag period of additional compensation amount. Through the pH-concentration coupling correction mechanism, rapid elimination of micro-deviations is achieved, ensuring that the mineral concentration of the finished water always fluctuates within a narrow range around the target value, meeting the stringent requirements of high-end aquatic products for quality consistency.

[0016] Fourthly, the present invention adopts a dynamic weight distribution and hybrid strength coupling strategy, develops a dynamic weight adjustment algorithm based on the deviation of the cooperation coefficient, preferentially enhances the compensation weight of key ions, and cooperates with the intelligent linkage of the rotation speed of the turbulent mixer and the concentration deviation to form a robust control system with multi-parameter cooperation, significantly enhancing the regulation reliability of the system under extreme water quality conditions. By strengthening the mixing shear effect, the local supersaturation phenomenon is inhibited, and the crystallization risk of calcium and magnesium salts is greatly reduced, ensuring long-term stable operation under complex working conditions.

[0017] Fifthly, the present invention proposes a reverse temperature difference control strategy for calcium and magnesium compensation liquid. Through the two-way regulation of accelerating the dissolution of calcium liquid by heating and inhibiting the activity of magnesium liquid by cooling, the one-way limitation of traditional temperature compensation is broken through, significantly shortening the pH regulation cycle. Through differential temperature intervention, the dissolution kinetic process of calcium and magnesium ions is optimized, effectively improving the utilization efficiency of the compensation liquid, and providing a key guarantee for quickly restoring ion balance. Description of the Drawings

[0018] Figure 1 is the flow chart of the method for realizing dynamic balance of raw water minerals based on ion cooperative regulation of the present invention; Figure 2 is the structural diagram of the raw water mineral dynamic balance regulation system of the present invention; Figure 3 is the schematic diagram of the dynamic regulation process of calcium and magnesium ion concentrations in Example 1; Figure 4 is the schematic diagram of the change trend of the cooperation coefficient in Example 1; Figure 5 is the schematic diagram of the linkage process of pH fluctuation and temperature compensation in Example 1.

[0019] In the figures: 100, Quartz sand filter; 101, First on-line ion chromatograph; 102, Temperature sensor; 103, Selective ion separation and concentration device; 104, Calcium compensation liquid storage tank; 105, Magnesium compensation liquid storage tank; 106, Cation exchange membrane group; 107, Negative pressure concentration module; 108, Temperature control coil; 109, Temperature control module; 200, Mineralization reaction tank; 201, pH electrode; 202, Turbulent mixer; 203, Variable frequency motor; 300, Fuzzy PID controller; 301, Dynamic cooperation coefficient calculation module; 302, Compensation liquid weight distribution module; 400, Dual-channel injection pump; 401, Calcium compensation channel; 402, Magnesium compensation channel; 403, Y-type mixer; 404, High-precision flowmeter; 500, Pneumatic diaphragm valve; 600, Second on-line ion chromatograph. Detailed implementation manners

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Refer to Figure 1 and Figure 2, the present invention designs a source water mineral dynamic balance adjustment system, including a quartz sand filter 100, a first on-line ion chromatograph 101, a temperature sensor 102, a selective ion separation and concentration device 103, a calcium compensation liquid storage tank 104, a magnesium compensation liquid storage tank 105, a mineralization reaction tank 200, a fuzzy PID controller 300, a double-channel injection pump 400, a pneumatic diaphragm valve 500, a second on-line ion chromatograph 600 and other structures. The water outlet of the quartz sand filter 100 is divided into two branches through a shunt pipeline: the first branch is connected to the selective ion separation and concentration device 103, which is internally provided with a cation exchange membrane group 106 and a negative pressure concentration module 107 for separating and concentrating calcium and magnesium ions from the source water, and the generated calcium compensation liquid and magnesium compensation liquid are respectively stored in the calcium compensation liquid storage tank 104 and the magnesium compensation liquid storage tank 105 with a temperature control coil 108, and the temperature control coil 108 adjusts the temperature of the compensation liquid through a temperature control module 109; the second branch is connected to the first on-line ion chromatograph 101 and the temperature sensor 102 to detect the concentrations of calcium, magnesium, bicarbonate ions and water temperature in real time. A pH electrode 201 is installed at the top of the mineralization reaction tank 200, a turbulent mixer 202 driven by a variable frequency motor 203 is configured at the bottom, and the side wall is respectively connected to the calcium compensation liquid and magnesium compensation liquid injection pipelines through a Y-shaped mixer 403. The fuzzy PID controller 300 is connected to the first on-line ion chromatograph 101, the temperature sensor 102, and the pH electrode 201 through a data bus, and internally integrates a dynamic coordination coefficient calculation module 301 and a compensation liquid weight distribution module 302 for calculating the coordination coefficient in real time and distributing the injection ratio of the compensation liquid. The double-channel injection pump 400 includes a calcium compensation channel 401 and a magnesium compensation channel 402, which are respectively connected to the calcium compensation liquid storage tank 104 and the magnesium compensation liquid storage tank 105 through corrosion-resistant pipelines, and each channel is equipped with a high-precision flow meter 404 for feeding back the actual injection amount. The water inlet of the second on-line ion chromatograph 600 of the closed-loop feedback unit is connected to the water outlet of the mineralization reaction tank 200 through a sampling pipe, and the pneumatic diaphragm valve 500 is installed at the liquid supplement port of the mineralization reaction tank 200 to receive the instruction of the fuzzy PID controller 300 to perform high-frequency liquid supplement.

[0022] When the system is running, the raw water is filtered by the quartz sand filter 100 and then divided into two branches: the first branch enters the selective ion separation and concentration device 103, where calcium and magnesium ions are separated by the cation exchange membrane group 106 and concentrated by the negative pressure concentration module 107. The generated compensation liquid is stored in the calcium compensation liquid storage tank 104 and the magnesium compensation liquid storage tank 105, and the temperature control module 109 adjusts the temperature of the compensation liquid through the temperature control coil 108. After the first branch enters the selective ion separation and concentration device 103, it first flows through the cation exchange membrane group 106. This membrane group selectively separates calcium ions Ca²⁺ and magnesium ions Mg²⁺ under the action of an electric field through electrodialysis technology, causing the two to migrate to independent ion channels respectively. The separated calcium and magnesium ion solutions enter the negative pressure concentration module 107, where water is removed by low-temperature evaporation in a low-pressure environment. The calcium ion solution is concentrated into a high-concentration calcium compensation liquid, and the magnesium ion solution is concentrated into a high-concentration magnesium compensation liquid. Finally, the concentrated calcium compensation liquid is transported to the calcium compensation liquid storage tank 104 for storage, and the magnesium compensation liquid is stored in the magnesium compensation liquid storage tank 105, providing a high-activity compensation liquid source for subsequent dynamic mineralization regulation. The second branch flows through the first online ion chromatograph 101 to detect the ion concentration, and the temperature sensor 102 synchronously collects the water temperature. After the pretreated water enters the mineralization reaction tank 200, the pH electrode 201 monitors the pH value in real time. When it is detected that the pH fluctuation exceeds the limit, the fuzzy PID controller 300 controls the calcium compensation channel 401 and the magnesium compensation channel 402 of the dual-channel injection pump 400 to inject the compensation liquid in proportion according to the output of the dynamic cooperation coefficient calculation module 301 and the weight distribution result of the compensation liquid weight distribution module 302. The high-precision flowmeter 404 calibrates the injection volume in real time, the Y-type mixer 403 mixes the compensation liquid with the raw water, and the turbulent mixer 202 increases the rotation speed according to the concentration deviation under the drive of the variable-frequency motor 203 to enhance the mixing effect. When the finished water flows out of the mineralization reaction tank 200, the second online ion chromatograph 600 detects the calcium and magnesium ion concentrations. If the deviation exceeds the standard, the fuzzy PID controller 300 triggers the pneumatic diaphragm valve 500 to perform high-frequency pulse liquid supplement. At the same time, the temperature control module 109 adjusts the temperature of the compensation liquid according to the pH deviation direction. For example, when the pH is too high, the calcium compensation liquid is heated and the magnesium compensation liquid is cooled to quickly correct the ion balance through the temperature effect.

[0023] The quartz sand filter 100 and the selective ion separation and concentration device 103 ensure the high concentration and activity of the compensation liquid; the fuzzy PID controller 300 integrates multiple parameters such as ion concentration, temperature, pH, and the coordination coefficient to achieve the dynamic matching of the compensation liquid injection rate and the mixing intensity; the dual-channel injection pump 400 and the high-precision flowmeter 404 ensure that the error rate of the chemical agent injection amount is ≤0.3%; the variable frequency speed regulation function of the turbulent mixer 202 effectively inhibits local precipitation; the closed-loop feedback unit eliminates the cumulative error in real time through the high-frequency liquid replenishment mechanism of the second on-line ion chromatograph 600 and the pneumatic diaphragm valve 500. Through the multi-dimensional coordinated regulation of temperature-concentration-pH, problems such as ion compensation lag, uneven mixing, and out-of-control pH fluctuation in the traditional method are solved, and the dynamic balance of minerals can still be maintained under complex water quality fluctuations, significantly improving the stability of the finished water quality.

[0024] The following introduces the specific steps of the method for realizing the dynamic balance of source water minerals based on ion coordinated regulation designed by the present invention: Step S1: Source water pretreatment and target parameter setting; Step S11, after the source water is filtered by the quartz sand filter 100, it is divided into two branches: The first branch: enters the selective ion separation and concentration device 103 (including the cation exchange membrane group 106 and the negative pressure concentration module 107), separates and concentrates calcium and magnesium ions to generate calcium compensation liquid and magnesium compensation liquid, which are respectively stored in the calcium compensation liquid storage tank 104 and the magnesium compensation liquid storage tank 105. A temperature control coil 108 is arranged in the storage tank, and the temperature of the compensation liquid is adjusted through the temperature control module 109.

[0025] The second branch: The concentrations of calcium (Ca²⁺), magnesium (Mg²⁺), and bicarbonate (HCO3⁻) are detected by the first on-line ion chromatograph 101 at a frequency of 5 seconds / time, and at the same time, the water temperature (T) is monitored by the temperature sensor 102. Step S12, set the target parameters: Target calcium ion concentration: (ppm); Target magnesium ion concentration: (ppm); Target pH value: ; Step S13, establish a dynamic coordination coefficient model, and the formula is: ; Parameter description: : Initial coordination coefficient (dimensionless); Source water 、Source water 、Source water : Ion concentration in source water (ppm); : Absolute temperature (K); Exponential terms: 0.7, 0.5, 1.2: Activity regulators for calcium, magnesium, and bicarbonate ions; 28.5 10³: System activation energy (J / mol); 8.314: Universal gas constant (J / (mol·K)); : Correction term for the effect of temperature on ion activity; This model breaks through the limitations of traditional static ratios by quantifying the synergistic effect of ion concentration and temperature, achieving dynamic adaptive regulation. For example, when the water temperature rises, the exponential term corrects the ion activity, avoiding carbonate precipitation caused by temperature fluctuations and significantly improving the accuracy of mineral balance.

[0026] Step S2: Dynamic mineralization regulation control. Step S21: Install a pH electrode 201 in the mineralization reaction tank 200 to monitor the pH value. When the detected pH fluctuation exceeds the threshold the fuzzy PID controller 300 dynamically adjusts the injection rate of the compensation liquid through the following formula: ; ; Parameter description: 、 : Injection rates of calcium compensation liquid and magnesium compensation liquid (μL / s); 、 : Dynamic weight coefficients; 0.8: Proportional term reference coefficient to ensure the basic injection volume; : Integral term gain coefficient to suppress the influence of the synergy coefficient deviation on the integral; : Integral operation of the synergy coefficient deviation to eliminate the cumulative error; The fuzzy PID controller 300 couples the pH fluctuation and the synergy coefficient deviation to achieve non-linear optimal control. When deviates from the target, the integral term automatically suppresses overshoot, avoiding the oscillation problem of the traditional PID algorithm during pH mutation, and significantly improving the response speed.

[0027] Step S22, inject the compensation liquid through the calcium compensation channel 401 and magnesium compensation channel 402 of the dual-channel injection pump 400. The volume calculation formula is: ; ; Parameter description: 、 : Injection volume (μL) of calcium compensation solution and magnesium compensation solution; : Adjustment time (s); 、 : Equivalent concentration (g / L) of calcium compensation solution and magnesium compensation solution; Turbulent mixer speed control: ; Parameter description: : Rotational speed (rpm), reference value 1200 rpm; 0.08: Rotational speed-concentration coupling coefficient, dynamically increasing the mixing intensity according to the concentration deviation 、 ; The dual-channel injection pump 400 and the high-precision flowmeter 404 cooperate, with a volume error rate ≤ 0.3% to ensure accurate dosing of the medicament. The rotational speed of the turbulent mixer 202 increases adaptively with the concentration deviation. For example, when exceeds the threshold, the rotational speed can be increased up to 1.6 times the reference value, improving the mixing uniformity and effectively suppressing local precipitation.

[0028] Step S3: Closed-loop feedback control. In step S31, the ion concentration is detected at the outlet of the mineralization reaction tank 200 through the second on-line ion chromatograph 600, and the additional amount calculation formula is: ; ; Parameter description: 、 : Additional volume (mL); 、 : Concentration deviation (ppm); : Effective volume of the mineralization tank (L); 、 : Storage concentration of the compensation solution (g / L); : pH deviation correction coefficient, coupling the pH fluctuation to adjust the additional amount; In step S32, the pneumatic diaphragm valve 500 performs high-frequency pulsed liquid addition (single time ≤ 2 s), and the final product water meets: ; ; Parameter description: 、 : Calcium and magnesium ion concentration allowable deviation threshold (ppm); closed-loop feedback quickly eliminates residual deviation through high-frequency pulse rehydration, and the single rehydration time is ≤2 seconds to avoid mixing lag. Final finished product water synergy coefficient Stable at 0.85–1.15, pH fluctuation ≤0.2, ion concentration deviation controlled within ±5 ppm, meeting high-end aquatic product standards.

[0029] Quartz sand filter 100 and selective ion separation and concentration device 103: realize source water pretreatment and high-activity compensation liquid preparation to ensure the consistency of reagent concentration. Fuzzy PID controller 300: integrate dynamic synergy coefficient calculation module 301 and compensation liquid weight distribution module 302 to realize multi-parameter coupling control. Pneumatic diaphragm valve 500: high-frequency pulse fluid replenishment is linked with turbulent mixer 202 to ensure instantaneous dispersion of reagents and avoid local concentration accumulation. Through the above steps, the present invention can still maintain the dynamic balance of minerals under complex water quality fluctuations, and the quality stability of finished water is greatly improved.

[0030] When the real-time synergy coefficient in the mineralization reaction tank 200 Deviation from target value When the calcium and magnesium compensation solution injection ratio is dynamically adjusted by the compensation solution weight distribution module 302. The specific steps are as follows: Weight distribution formula: ; Parameter Description: : Dynamic weight coefficient of calcium compensation solution (dimensionless), initial reference value 0.6; : Dynamic weight coefficient of magnesium compensation fluid (dimensionless); : preset target synergy coefficient (dimensionless); : real-time synergy coefficient (dimensionless); : Normalized synergy coefficient deviation.

[0031] Execution process: When When the real-time coordination coefficient is is 0.7, the target value is 1.0, then ; Fuzzy PID controller 300 based on and The injection priorities of the calcium compensation solution tank 104 and the magnesium compensation solution tank 105 are allocated.

[0032] Since calcium ions are more sensitive to pH buffering, the proportion of calcium compensation solution is preferentially increased to shorten the adjustment time; by normalizing the deviation, weight mutation is avoided and system overshoot is reduced.

[0033] The rotational speed of the turbulent mixer is dynamically controlled. According to the deviation of calcium and magnesium ion concentrations, the rotational speed of the turbulent mixer 202 is dynamically adjusted. The specific formula is: ; Parameter description: : Rotational speed of the turbulent mixer (unit: rpm), reference value 1200 rpm; : Absolute deviation between the measured value and the target value of calcium ion concentration (unit: ppm); : Absolute deviation between the measured value and the target value of magnesium ion concentration (unit: ppm); 、 : Allowable deviation thresholds of calcium and magnesium ions (unit: ppm); 0.08: Rotational speed-concentration coupling coefficient (dimensionless), controlling the amplitude of the rotational speed increase with the deviation.

[0034] Execution process: When the calcium ion deviation ppm and the magnesium ion deviation ppm, and ppm, ppm, ; The variable-frequency motor 203 drives the turbulent mixer 202 to accelerate, strengthening the dispersion of the medicament. At high rotational speeds, the turbulent mixer 202 enhances the shear force to prevent the local supersaturation precipitation of calcium and magnesium salts; the greater the concentration deviation, the higher the rotational speed, and the mixing efficiency is adapted to the adjustment requirements in real time.

[0035] The volume error rate of the dual-channel injection pump is controlled, strictly restricting the injection volume error rates of the calcium compensation channel 401 and the magnesium compensation channel 402: ; Parameter description: 、 : Volume error rates of the calcium compensation solution and the magnesium compensation solution (unit: %); 、 : Actual injection volume (unit: μL); 、 : Theoretical injection volume (unit: μL).

[0036] Execution process: The high-precision flowmeter 404 monitors the actual flow rates of the calcium compensation channel 401 and the magnesium compensation channel 402 in real time and feeds them back to the fuzzy PID controller 300. If the error rate exceeds the limit, the controller 300 dynamically corrects the pulse frequency of the injection pump stepping motor.

[0037] The control of the error rate ensures the control accuracy of calcium and magnesium ion concentrations and reduces the cost losses caused by over-injection or under-injection.

[0038] Active compensation for the temperature of the compensation liquid, adjusting the injection temperature of the calcium and magnesium compensation liquids according to the pH deviation direction. The formula is: ; Parameter description: 、 : The injection temperatures of the calcium compensation liquid and the magnesium compensation liquid (unit: °C); : The real-time water temperature in the mineralization tank 200 (unit: °C); : The pH deviation direction function, takes +1 when, takes -1 when; 6, 4: The temperature compensation reference values of the calcium compensation liquid and the magnesium compensation liquid (unit: °C).

[0039] Execution process: When (pH is on the high side), the temperature control coil 108 of the calcium compensation liquid storage tank 104 heats the compensation liquid to °C, and the magnesium compensation liquid storage tank 105 cools to °C; The high-temperature calcium compensation liquid accelerates dissolution, and the low-temperature magnesium compensation liquid inhibits the reaction rate, synergistically reducing the pH value.

[0040] By reversely adjusting the ion activity through temperature, the pH stabilization time is shortened. The temperature difference design of the calcium and magnesium compensation liquids matches the differences in their dissolution kinetics, improving the adjustment efficiency.

[0041] Example 1: In this example, the raw water of a natural underground water source in a certain area is collected. The initial detection data of the raw water is as follows: Calcium ion concentration of raw water ; Magnesium ion concentration of raw water ; Bicarbonate ion concentration of raw water ; Water temperature ; The target parameters are set as: ,, ; , ; , ; ; Pretreatment and dynamic cooperation coefficient calculation (step S1): Preparation of compensation liquid. The first branch source water is separated and concentrated by a cation exchange membrane group to obtain calcium compensation liquid ( ), magnesium compensation liquid ( ).

[0042] Initial cooperation coefficient calculation: ; Real-time cooperation coefficient adjustment with the target ratio: ; Detected , triggering the weight adjustment mechanism; Dynamic mineralization regulation (step S2): Dynamic weight distribution, adjusting the weight coefficient according to the formula: ; Calculation of the injection rate of the compensation liquid: Detected (high pH), integral term : ; ; Injection volume and mixing control: Adjusting time , calculating the volume: ; Turbulent mixer speed control. Under the conditions of , , the speed of the turbulent mixer is calculated according to the formula as ; Closed-loop feedback control (step S3): Closed-loop detection of ion concentration: Detection value after mineralization: (deviation ); (deviation ); Calculation of the additional amount and liquid supplementation: Only magnesium compensation liquid needs to be added: ; The pneumatic diaphragm valve performs pulsed liquid supplementation, and the parameters of the final product water: (target range ); (Meet ); , ;

[0043] By preferentially increasing the calcium compensation ratio (64.4%) to quickly raise to the safe range.

[0044] Because , the calcium compensation solution is heated to , accelerating dissolution; the magnesium compensation solution is cooled to , inhibiting the reaction. Precisely add the magnesium compensation solution, and the deviation is corrected from to within the threshold.

[0045] According to Example 1, the following simulation experiment demonstrates the changes in calcium and magnesium ion concentrations ( Figure 3 ), the dynamic response of the synergy coefficient ( Figure 4 ), and verifies the real-time regulation ability of the fuzzy PID controller for water quality fluctuations. Through the stability of the synergy coefficient and the pH-temperature linkage ( Figure 5 ), the multi-dimensional coupling control advantages of ion concentration, temperature, and pH are proven. Through the closed-loop feedback stage ( Figure 3 ) and high-frequency pulsed fluid infusion, the ability of the system to suppress complex disturbances is verified.

[0046] Figure 3 is the process diagram of the dynamic regulation of calcium and magnesium ion concentrations. It can be seen from Figure 3 that the calcium ion concentration ( ) is dynamically regulated from the initial value of 25 ppm to the target value of 30 ppm; the magnesium ion concentration ( ) is dynamically regulated from the initial value of 18 ppm to the target value of 20 ppm; the dotted line represents the target concentration value; the light shaded area represents the allowable deviation threshold ( , ); The calcium and magnesium ion concentrations quickly approach the target value through the fuzzy PID controller, and the adjustment time is about 60 seconds. There are small fluctuations in the curve, reflecting the real-time response characteristics of the fuzzy PID to water quality fluctuations. In the closed-loop feedback stage (after 60 seconds), the concentration is stable within the range of the target value ± the threshold, and the maximum deviation is less than 0.3 ppm (calcium) and 0.25 ppm (magnesium). The light shaded band shows the ability of the closed-loop control to suppress the residual deviation.

[0047] The rapid dynamic regulation of calcium and magnesium concentrations is achieved through a fuzzy PID controller. The error rate ≤ 0.3%, demonstrating the accuracy of the multi-parameter coupling model. It remains stable when simulating water quality fluctuations with sinusoidal perturbations, verifying the robustness of the system.

[0048] Figure 4 is the dynamic change trend diagram of the synergy coefficient; it can be seen from Figure 4 that the synergy coefficient rises from the initial value of 0.78 to the target range (0.85 - 1.15); the light blue area is the target range of the synergy coefficient; The dynamic weight adjustment mechanism is triggered due to the imbalance of the source water ion ratio (initial value 0.78 < 0.85). In the stable stage (after 30 seconds), it enters the target range and stabilizes at 0.98, with a deviation ≤ ±0.02. The curve smoothly converges, reflecting the adaptive adjustment ability of the dynamic synergy coefficient model to the ion ratio. The ion synergy effect is quantified through a non-linear formula (including a temperature correction term) to achieve stability. When the calcium compensation weight increases to 66%, quickly restoring balance. The synergy coefficient integrates , , and temperature parameters, avoiding the defects of isolated regulation in traditional methods.

[0049] Figure 5 is the linkage diagram of pH fluctuation and temperature compensation. It can be seen from Figure 5 that the pH value drops from the initial 7.65 to the target 7.5 ± 0.2; the temperature of the calcium compensation solution rises from 25°C to 31°C (heating when pH is high); the temperature of the magnesium compensation solution drops from 25°C to 21°C (cooling when pH is high); when is detected, the calcium compensation solution is heated by 6°C to accelerate dissolution to lower the pH. The magnesium compensation solution is cooled by 4°C to inhibit the reaction rate and synergistically correct the pH deviation. The pH value stabilizes from 7.65 to 7.5 ± 0.1 within 30 seconds, with an overshoot < 0.05. The temperature compensation is linked with the ion injection rate, avoiding the oscillation problem of traditional PID control. The reverse temperature compensation strategy (heating the calcium solution / cooling the magnesium solution) shortens the pH stabilization time by 50%. The integral term gain coefficient inhibits the overshoot caused by the deviation of the synergy coefficient.

[0050] It can be seen from Figure 3 , Figure 4 that the deviation of calcium and magnesium ion concentrations ≤ 0.3 ppm, Stabilized within 0.85 - 1.15, demonstrating that the multi-parameter coupling model breaks through the limitations of traditional static ratios. From Figure 3 , Figure 5 , it can be seen the advantages of fuzzy PID control. The adjustment time is 60 seconds, and the pH overshoot is < 0.05, verifying the adaptability of fuzzy logic to non-linear systems. The volume error rate ≤ 0.3%, and the control precision of ion concentration and pH reaches the high-end aquatic product standard, verifying the significant advantages of the present invention in terms of dynamic balance precision, response speed, and anti-interference ability, and solving the technical bottlenecks such as hysteresis, overshoot oscillation, and local precipitation of traditional methods.

[0051] For those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or scope of the present invention. Therefore, the embodiments of the present invention are exemplary and non-limiting.

Claims

1. A method for achieving dynamic balance of source water minerals based on ionic co-regulation, characterized in that It includes the following steps: S1: Pretreatment and parameter setting: After filtering the source water, it is subjected to split-flow treatment. The first branch of the source water is selectively separated for calcium and magnesium ions and concentrated to prepare calcium compensation liquid and magnesium compensation liquid, which are respectively stored in the calcium compensation liquid storage tank and the magnesium compensation liquid storage tank; The second branch of the source water is used to detect the concentrations of calcium ions, magnesium ions, bicarbonate ions and water temperature in real time, set the target calcium and magnesium ion concentrations and the target pH value, and establish a dynamic coordination coefficient model based on the detection data; S2: Dynamic mineralization regulation: Import the pretreated water source into the mineralization reaction tank. When it is detected that the pH fluctuation exceeds the threshold, according to the coordination coefficient deviation and the pH fluctuation value, the injection rates of the calcium compensation liquid and the magnesium compensation liquid are dynamically adjusted through a fuzzy PID controller, and the injection volume of the compensation liquid is calculated respectively; S3: Closed-loop feedback control: The calcium and magnesium ion concentrations of the water body after mineralization are detected in a closed loop. When the concentration deviation exceeds the threshold, the additional amount of the compensation liquid is calculated to adjust the dynamic coordination coefficient, pH deviation, calcium ion concentration, and magnesium ion concentration to be stable within the target range.

2. The method according to claim 1, wherein The specific processes of steps S1 - S3 are as follows: S1: Source water pretreatment and target parameter setting, including: S11. Continuously detect the concentration values of three key ions in the second branch source water by using a first on-line ion chromatograph at a frequency of 5 seconds per time , , ; S12. Set the target calcium ion concentration , the target magnesium ion concentration , and the target pH value ; S13. Calculate the dynamic coordination coefficient based on the ion detection data, and establish an ion balance model through the following formula: ； In the formula: : Initial cooperation coefficient; Source water and source water and source water : The measured concentrations of calcium, magnesium, and bicarbonate ions in the source water; : The absolute temperature monitored in real time by the water temperature sensor; : Calcium ion activity regulator; : Magnesium ion activity regulator; : Bicarbonate ion activity regulator; : System activation energy; : Universal gas constant; S2: Dynamic mineralization regulation control, including: S21. Set the pH fluctuation threshold ; Introduce the pretreated water source into the mineralization reaction tank with a turbulent mixer. When the pH electrode detects that the pH fluctuation exceeds the set threshold , calculate the injection rates of the calcium compensation solution and the magnesium compensation solution respectively through a fuzzy PID controller. The operation formula is as follows: ； ； In the formula: , : Calcium compensation liquid and magnesium compensation liquid injection rates; , : Dynamic weight coefficients of calcium compensation liquid and magnesium compensation liquid, and ; : Proportional term reference coefficient; : pH deviation gain coefficient; : Absolute deviation between measured pH and target value; : Synergistic coefficient deviation value; : Integral term gain coefficient; : Synergistic coefficient suppression factor (dimensionless); : Real-time synergistic coefficient; : Preset target synergistic coefficient, by comparing the deviation of the real-time synergistic coefficient , the dynamic adjustment of the compensation liquid is realized; S22. Inject the calcium compensation liquid and the magnesium compensation liquid respectively through a dual-channel independent control injection pump, and the sub-item injection volume is calculated through the following formula: ； ； In the formula: , : Injection volumes of calcium compensation solution and magnesium compensation solution : Adjustment time; : The equivalent concentration in the calcium compensation solution ; : The equivalent concentration in the magnesium compensation solution ; S3: Closed-loop feedback control, including: S31. Set a second on-line ion chromatograph at the outlet of the mineralization tank for closed-loop detection of ion concentration. When it is detected that the calcium or magnesium ion concentration deviation exceeds the threshold, calculate the additional amount through the following formula: ； ； In the formula: , : Additional volume of calcium compensation solution and magnesium compensation solution; , : Deviation of calcium and magnesium ion concentrations; : Effective volume of the mineralization tank; , : Storage concentrations of calcium compensation solution and magnesium compensation solution; : pH deviation correction factor; S32. Perform high-frequency pulse liquid addition through a pneumatic diaphragm valve, and the single liquid addition time ≤ 2 seconds, and finally make the finished water meet: ； ； ； ； : Calcium ion concentration deviation threshold value; : Magnesium ion concentration deviation threshold.

3. The method according to claim 2, characterized in that, In step S21, when deviates from the target value, increases linearly with the deviation, and the calcium compensation liquid injection ratio is preferentially increased to quickly restore the ion balance; when the real-time cooperation coefficient , the dynamic weight coefficients and are adjusted according to the following formula: ； In the formula: : Dynamic weight coefficient of calcium compensation solution; : Dynamic weight coefficient of magnesium compensation solution; 0.6: Calcium weight reference adjustment factor; 0.2: Synergy coefficient deviation gain coefficient; : Preset target synergy coefficient; : Real-time synergy coefficient; : Normalized synergy coefficient deviation.

4. The method according to claim 2, wherein In step S22, the greater the concentration deviation, the rotational speed of the turbulent mixer is proportionally increased to enhance the mixing uniformity and suppress local precipitation, and is dynamically regulated by the following formula: ； In the formula: : Rotational speed of the turbulent mixer; 1200: Reference rotational speed; 0.08: Rotation speed-concentration coupling coefficient; : Absolute deviation between the measured value and the target value of calcium ion concentration; : Absolute deviation between the measured value and the target value of magnesium ion concentration; : Allowable deviation threshold of calcium ion concentration; : Allowable deviation threshold of magnesium ion concentration.

5. The method according to claim 2, wherein In step S22, the injection volume error rate of the dual-channel injection pump is controlled by the following formula: ； In the formula: : Volume error rate of calcium compensation solution; : Magnesium compensation liquid volume error rate; : The actual injection volume of the calcium compensation solution; : Theoretical injection volume of calcium compensation solution; : The actual injection volume of the magnesium compensation solution; : Theoretical injection volume of magnesium compensation liquid; : Calcium compensation solution injection rate; : Magnesium compensation liquid injection rate; : Adjust the time.

6. The method according to claim 2, wherein In step S21, when occurs, heat the calcium compensation liquid to accelerate dissolution. At the same time, cool the magnesium compensation liquid to inhibit the reaction rate and synergistically reduce the pH value. The injection temperatures of the calcium compensation liquid and the magnesium compensation liquid are regulated according to the following strategy: ； In the formula: : Calcium compensation solution injection temperature; : Magnesium compensation liquid injection temperature; : Real-time water temperature inside the mineralization tank; : pH deviation direction function, Take +1 when Take -1 when 6: Calcium compensation liquid temperature compensation reference value; 4: Magnesium compensation liquid temperature compensation reference value.

7. A source water mineral dynamic balance adjustment system for implementing the method according to any one of claims 1-6, characterized in that, It includes: A pretreatment unit, including a quartz sand filter, the outlet of which is divided into a first branch and a second branch through a split-flow pipeline. The first branch is connected to a selective ion separation and concentration device for preparing calcium compensation liquid and magnesium compensation liquid and storing them in a calcium compensation liquid storage tank and a magnesium compensation liquid storage tank; The second branch is connected to a first on-line ion chromatograph through a pipeline for real-time detection of calcium, magnesium and bicarbonate ion concentrations; A temperature sensor is installed at the outlet of the quartz sand filter to collect the source water temperature signal; The selective ion separation and concentration device includes a cation exchange membrane group and a negative pressure concentration module. The calcium compensation liquid storage tank and the magnesium compensation liquid storage tank are respectively provided with temperature control coils to adjust the temperature of the compensation liquid through a temperature control module; A mineralization reaction tank, with a pH electrode installed at the top to monitor the pH value in the tank, a turbulent mixer installed at the bottom, and the side wall is respectively connected to a calcium compensation liquid injection pipe and a magnesium compensation liquid injection pipe through a Y-shaped mixer; The rotating shaft of the turbulent mixer is connected to a variable frequency motor to dynamically adjust the rotation speed according to the concentration deviation; The fuzzy PID controller is connected to the first on-line ion chromatograph, temperature sensor, and pH electrode through the data bus respectively, receives ion concentration, water temperature, and pH data, and has a built-in dynamic cooperation coefficient calculation module and compensation liquid weight distribution module; The dual-channel injection pump includes a calcium compensation channel and a magnesium compensation channel, which are connected to the calcium compensation liquid storage tank and the magnesium compensation liquid storage tank through corrosion-resistant pipelines respectively; high-precision flow meters are equipped in each channel to feedback the actual injection volume to the fuzzy PID controller; The closed-loop feedback unit includes a second on-line ion chromatograph, whose water inlet is connected to the water outlet of the mineralization reaction tank through a sampling pipe to detect the calcium and magnesium ion concentrations of the finished water; a pneumatic diaphragm valve is installed at the liquid supplement port of the mineralization reaction tank to receive the pulse signal of the fuzzy PID controller and perform high-frequency liquid supplement.

Images