A smart water quality monitoring system and its control method

Abstract

This invention provides a water quality intelligent monitoring system and its control method. The system connects a water heat exchange system to a water circulation pipeline, and a first water quality monitoring module is installed on the pipeline to monitor the circulating water quality and drug concentration. A dosing tank is provided, and a dosing flow pump is installed on the dosing pipeline to add drugs according to the circulating water quality and drug concentration. A drain pipeline with a drain valve is configured to remove scale from the water. A water softener is provided, connected to the water circulation pipeline via an inlet pipeline, and a second water quality monitoring module is installed on the inlet pipeline to detect and improve the inlet water quality, maintaining a stable inlet water volume. A controller controls the operation of the dosing flow pump and the drain valve, and controls the water replenishment status of the inlet pipeline based on the monitoring data from the second water quality monitoring module, avoiding drug waste and ensuring the circulating water quality and system water supply.

Description

Technical Field

[0001] This invention relates to the fields of environmental monitoring and water treatment technology, specifically to an intelligent water quality monitoring system and its control method. Background Technology

[0002] In conventional water heat exchange systems, the quality of circulating water plays a crucial role in the performance of the equipment and can even affect the lifespan of the system. This includes boilers, cooling towers, and central air conditioning chilled water systems. Currently, the following technologies are available for water treatment:

[0003] For closed systems, such as boilers and central air conditioning cooling water systems, boiler systems can add water softeners (typically containing ion exchange resins or phosphates) to the inlet pipe to soften the water and reduce scaling in equipment, thus preventing scaling during high-temperature heating. Central air conditioning cooling water systems can utilize automated chemical dosing control systems. For open systems, such as cooling towers and power plants, regular chemical dosing and wastewater discharge improve the quality of the circulating water and prevent scaling. However, current technologies lack a systematic approach to circulating water quality monitoring, correction, and wastewater treatment.

[0004] The related technology discloses a boiler phosphate dosing device and method, which enables simultaneous dosing and preparation of chemicals, simplifies the dosing operation, and reduces the cost of calcium scale treatment. The technical solution involves a dosing tank and a mixing tank, with several dosing pipes connected to the dosing tank. It also includes a stirring structure and a heating device. At least two mixing tanks are provided, one for phosphate and the other for pure water. The mixing tanks are connected to the dosing tanks via mixing pipes, each equipped with a mixing pump and a mixing flow meter. However, this system only treats the influent water quality, neglecting to monitor the quality of the boiler's internal circulating water, and thus does not know when scale treatment or sewage discharge is needed.

[0005] The related technology also discloses a central air conditioning cooling water dosing operation and maintenance control system and its control method, which is used for central air conditioning circulating water system. It belongs to closed water system. Its technical solution is to integrate a sewage discharge device, a dosing device and a cloud platform into an integrated system to realize functions such as online water quality detection, automatic operation of sewage discharge before dosing, dosing quantity statistics and cloud platform monitoring. However, the system lacks the adjustment and treatment of water replenishment after system leakage, and the control and adjustment of dosing quantity and sewage discharge process make it difficult to avoid ineffective sewage discharge leading to waste of dosing quantity. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a water quality intelligent monitoring system and its control method to solve the problem of the lack of a systematic treatment system for circulating water quality monitoring, correction and sewage treatment in related technologies.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0008] According to a first aspect of the present invention, a water quality monitoring system is provided, comprising:

[0009] A water heat exchange system, and a water circulation pipeline connecting the input and output ends of the water heat exchange system; a first water quality monitoring module is installed on the water circulation pipeline, and the water heat exchange system is also equipped with a sewage discharge pipeline, on which a sewage discharge valve is installed;

[0010] A water softener is connected to the water circulation pipeline via an inlet pipe, and a second water quality monitoring module is installed on the inlet pipe.

[0011] The dosing tank is connected to the water circulation pipeline via a dosing pipeline, and a dosing flow pump is installed on the dosing pipeline.

[0012] The controller is connected to the first water quality monitoring module, the second water quality monitoring module, the dosing flow pump, and the drain valve, respectively. It is used to control the working status of the dosing flow pump and the drain valve according to the monitoring data of the first water quality monitoring module, and to control the water replenishment status of the inlet pipeline according to the monitoring data of the second water quality monitoring module.

[0013] Preferably, the first water quality monitoring module includes:

[0014] A first conductivity detector is used to detect the conductivity of water in the water circulation pipeline;

[0015] The first pH value detector is used to detect the pH value of the water in the water circulation pipeline;

[0016] The first concentration meter is used to detect the drug concentration value in the water in the water circulation pipeline.

[0017] Preferably, the second water quality monitoring module includes:

[0018] A second conductivity detector is used to detect the conductivity of water in the inlet pipe;

[0019] The second pH detector is used to detect the pH value of the water in the inlet pipe.

[0020] Preferably, the water inlet pipe is further provided with:

[0021] The first flow meter is installed at the inlet end of the water softener and is connected to the controller;

[0022] The water supply valve is located upstream of the first flow meter and is connected to the controller.

[0023] Preferably, the dosing pipeline includes:

[0024] The first and second dosing lines are connected in parallel to the water circulation pipeline;

[0025] Preferably, the dosing flow pump includes:

[0026] The first dosing flow pump is installed on the first dosing pipeline;

[0027] The second dosing flow pump is installed on the second dosing pipeline.

[0028] Preferably, the dosing tank includes:

[0029] The first dosing tank contains alkaline drugs and is connected to the water circulation pipeline through the first dosing pipeline.

[0030] The second dosing tank stores acidic drugs and is connected to the water circulation pipeline via a second dosing pipeline.

[0031] Preferably, the system further includes:

[0032] A one-way valve is installed on the first and second dosing lines.

[0033] Preferably, the sewage pipe is further provided with:

[0034] The second flow meter is used to detect the flow rate of sewage in the sewage pipeline;

[0035] The second concentration meter is used to detect the concentration of chemicals in the sewage in the sewage pipeline;

[0036] The second flow meter and the second concentration meter are both connected to the controller.

[0037] Preferably, the system further includes:

[0038] The water circulation pipeline is equipped with a drain valve, which is connected to the controller.

[0039] According to a second aspect of the present invention, a control method for a water quality intelligent monitoring system is provided, comprising:

[0040] Acquire monitoring data from the first water quality monitoring module and the second water quality monitoring module;

[0041] Based on the monitoring data from the first water quality monitoring module, the operating status of the dosing flow pump and the drain valve is controlled, and based on the monitoring data from the second water quality monitoring module, the water replenishment status of the inlet pipeline is controlled.

[0042] Preferably, acquiring the monitoring data from the first water quality monitoring module and the second water quality monitoring module includes:

[0043] The water supply valve, drain valve, air drain valve, first dosing flow pump, and second dosing flow pump are all in the closed state;

[0044] Obtain the conductivity value Φ1 detected by the first conductivity detector;

[0045] Obtain the pH value Ψ1 detected by the first pH detector;

[0046] Obtain the concentration value ρ1 detected by the first concentration meter;

[0047] Obtain the conductivity value Φ2 detected by the second conductivity detector;

[0048] Obtain the pH value Ψ2 detected by the second pH detector;

[0049] Determine the target conductivity value as X, the lower limit of pH as Y, and the upper limit of pH as Z. Determine the lower limit of ρ1 as A and the upper limit as B.

[0050] Preferably, the step of controlling the operating status of the dosing flow pump and the drain valve based on the monitoring data of the first water quality monitoring module, and controlling the water replenishment status of the inlet pipeline based on the monitoring data of the second water quality monitoring module, includes:

[0051] If the monitoring data meets the first preset condition, the working status of the dosing flow pump and the drain valve is controlled according to the first control strategy.

[0052] If the monitoring data meets the second preset condition, the working status of the dosing flow pump and the drain valve is controlled according to the second control strategy.

[0053] If the monitoring data meets the third preset condition, the working status of the dosing flow pump and the drain valve is controlled according to the third control strategy.

[0054] If the monitoring data meets the fourth preset condition, the working state of the drain valve and the water replenishment state of the inlet pipeline are controlled according to the fourth control strategy.

[0055] Preferably, the first preset conditions are: Φ1≤X, Y≤Ψ1≤Z, A≤ρ1≤B, and the step of controlling the working state of the dosing flow pump and the drain valve according to the first control strategy specifically includes:

[0056] Maintain the system's current operating status, and keep the dosing pump and drain valve in the closed position.

[0057] Preferably, the second preset condition is: Φ1 > X, Ψ1 < Y, ρ1 < A. The step of controlling the operating state of the dosing flow pump and the drain valve according to the second control strategy specifically involves:

[0058] Turn on the first dosing pump to add alkaline reagent to the system for neutralization, and calculate the system dosage.

[0059] Once the target dosage is reached, the first dosing flow pump is turned off, and the total number of dosing operations is counted once.

[0060] If the cumulative number of dosings is less than the preset number, maintain the current working state of the system and keep the working state of the dosing flow pump and the drain valve unchanged.

[0061] If the cumulative number of chemical additions is greater than or equal to the preset number, the cumulative number of chemical additions will be reset to zero, and the drain valve will be opened to enter the drain control. The working status of the drain valve and the water replenishment status of the inlet pipeline will be controlled according to the fourth control strategy.

[0062] Preferably, the third preset condition is: Φ1>X, Ψ1>Z, ρ1<A, and the control of the working state of the dosing flow pump and the drain valve according to the third control strategy specifically includes:

[0063] Turn on the second dosing flow pump, add acidic reagent to the system to neutralize it, and calculate the system dosage;

[0064] Once the target dosage is reached, the second dosing flow pump is turned off, and the total number of dosing operations is recorded as one.

[0065] If the cumulative number of dosings is less than the preset number, maintain the current working state of the system and keep the working state of the dosing flow pump and the drain valve unchanged.

[0066] If the cumulative number of chemical additions is greater than or equal to the preset number, the cumulative number of chemical additions will be reset to zero, and the drain valve will be opened to enter the drain control. The working status of the drain valve and the water replenishment status of the inlet pipeline will be controlled according to the fourth control strategy.

[0067] Preferably, the target quantity is determined according to the following steps:

[0068] If the cumulative number of dosing operations recorded by the system is 0 when the dosing flow pump is turned on, the target amount is set as the amount of chemicals lost during the most recent sewage discharge, G.

[0069] If the cumulative number of dosing operations recorded by the system is greater than 0 when the dosing flow pump is turned on, the target amount is determined as the product of the preset dosing ratio d and the amount of chemicals lost during the most recent sewage discharge, d*G.

[0070] Preferably, the fourth preset condition is: Φ1 > X, Ψ1 < Y ​​or Ψ1 > Z, ρ1 > B. Specifically, the working state of the drain valve and the water replenishment state of the inlet pipe according to the fourth control strategy are as follows:

[0071] Open the drain valve;

[0072] Obtain the sewage flow rate Q2 detected by the second flow meter;

[0073] Obtain the concentration value ρ2 detected by the second concentration meter detector;

[0074] Calculate and record the amount of chemicals lost from the sewage system in real time: G = sewage discharge time t * concentration ρ2 * sewage discharge flow rate Q2;

[0075] When A≤ρ1≤B, close the drain valve, open the water supply valve, record the water supply flow rate Q1 detected by the first flow meter in real time, and read the conductivity Φ1 and pH value Ψ1.

[0076] If Φ2≥Φ1, the water softener is determined to be faulty, and the system prompts to replace the water softener. After replacing the water softener, continue to add water until Q2=Q1, then close the water inlet valve.

[0077] If Φ2 < Φ1, continue to add water until Q2 = Q1, then close the water supply valve.

[0078] Preferably, the control method further includes:

[0079] After water replenishment is complete, open the drain valve and run it for a preset time T, then close the drain valve.

[0080] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0081] By connecting the water heat exchange system to the water circulation pipeline and installing a first water quality monitoring module on the water circulation pipeline, the system can monitor the circulating water quality and drug concentration. A dosing tank is installed, connected to the water circulation pipeline via a dosing pipeline, and equipped with a dosing flow pump on the dosing pipeline. This allows for the addition of drugs based on the circulating water quality and drug concentration, thereby improving water quality. A drain pipe with a drain valve is configured in the water heat exchange system to remove scale from the water and prevent pipeline blockage. A water softener is installed, connected to the water circulation pipeline via an inlet pipe, and equipped with a second water quality monitoring module on the inlet pipe. This allows for the detection and improvement of the inlet water quality, ensuring a stable inlet water flow. A controller controls the operation of the dosing flow pump and drain valve, and, based on the monitoring data from the second water quality monitoring module, controls the water replenishment status of the inlet pipeline, preventing drug waste and ensuring the quality of the circulating water and the system's water supply. Attached Figure Description

[0082] Figure 1 This is a schematic diagram of the structure of a water quality monitoring system according to an exemplary embodiment;

[0083] Figure 2 This is a flowchart illustrating a control method for a water quality monitoring system according to another exemplary embodiment;

[0084] Figure 3 This is a flowchart illustrating a sewage discharge and water replenishment control method according to another exemplary embodiment. Detailed Implementation

[0085] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0086] Example 1

[0087] Figure 1 This is a schematic diagram illustrating the structure of a water quality monitoring system according to an exemplary embodiment, such as... Figure 1 As shown, the system includes:

[0088] A water heat exchange system 1, and a water circulation pipeline 2 connected to the input and output ends of the water heat exchange system 1; a first water quality monitoring module 21 is installed on the water circulation pipeline 2, and the water heat exchange system 1 is also equipped with a sewage discharge pipeline 22, on which a sewage discharge valve 23 is installed;

[0089] The water softener 3 is connected to the water circulation pipeline 2 through the water inlet pipeline 31, and a second water quality monitoring module 32 is installed on the water inlet pipeline 31.

[0090] The dosing tank 4 is connected to the water circulation pipeline 2 via a dosing pipeline 41, and a dosing flow pump 42 is installed on the dosing pipeline 41.

[0091] The controller 5 is connected to the first water quality monitoring module 21, the second water quality monitoring module 32, the dosing flow pump 42, and the drain valve 23 respectively. It is used to control the working status of the dosing flow pump 42 and the drain valve 23 according to the monitoring data of the first water quality monitoring module 21, and to control the water replenishment status of the inlet pipe 31 according to the monitoring data of the second water quality monitoring module 32.

[0092] It should be noted that the water softener 3 can remove hardness ions (such as calcium and magnesium) from the water, thereby improving the quality of the incoming water and preventing scale buildup in the pipes or blockage of the water pipe heating system.

[0093] It is understood that the technical solution provided in this embodiment, by connecting the water pipe heat system to the water circulation pipe 2 and installing a first water quality monitoring module 21 on the water circulation pipe 2, can monitor the water quality and drug concentration of the circulating water; a dosing tank 4 is installed, connected to the water circulation pipe 2 via a dosing pipe 41, and a dosing flow pump 42 is installed on the dosing pipe 41, which can add drugs according to the circulating water quality and drug concentration, thereby improving water quality; and a sewage pipe 22 is configured in the water heat exchange system 1, and a dosing pump 42 is installed on the sewage pipe 22. The drain valve 23 can discharge dirt from the water to prevent pipe blockage; a water softener 3 is provided, which is connected to the water circulation pipe 2 through the inlet pipe 31, and a second water quality monitoring module 32 is installed on the inlet pipe 31 to detect and improve the quality of the incoming water and keep the inlet water volume stable; the controller 5 can control the working status of the chemical dosing pump 42 and the drain valve 23, and control the water replenishment status of the inlet pipe 31 according to the monitoring data of the second water quality monitoring module 32 to avoid chemical waste and ensure the quality of circulating water and the system water supply.

[0094] In practice, the first water quality monitoring module 21 includes:

[0095] The first conductivity detector 211 is used to detect the conductivity of water in the water circulation pipeline 2;

[0096] The first pH value detector 212 is used to detect the pH value of the water in the water circulation pipeline 2;

[0097] The first concentration meter 213 is used to detect the drug concentration value of the water in the water circulation pipeline 2.

[0098] It is understood that the technical solution provided in this embodiment, by setting a first conductivity detector 211, a first pH detector 212 and a first concentration meter 213, can detect the conductivity, pH value and drug concentration value of the water in the water circulation pipeline 2 respectively, thereby determining the quality of the circulating water.

[0099] In practice, the second water quality monitoring module 32 includes:

[0100] The second conductivity detector 321 is used to detect the conductivity of the water in the water inlet pipe 31;

[0101] The second pH detector 322 is used to detect the pH value of the water in the water inlet pipe 31.

[0102] It is understood that the technical solution provided in this embodiment, by setting a second conductivity detector 321 and a second pH value detector 322, can detect the conductivity and pH value of the water in the water inlet pipe 31 respectively, thereby determining the water quality of the inlet.

[0103] In practice, the water inlet pipe 31 is also equipped with:

[0104] The first flow meter 33 is installed at the inlet end of the water softener 3 and is connected to the controller 5;

[0105] The water supply valve 34 is located upstream of the first flow meter 33 and is connected to the controller 5.

[0106] It is understood that the technical solution provided in this embodiment, by setting a first flow meter 33 and a water supply valve 34 on the water inlet pipe 31 and connecting them to the controller 5, can control the water inlet volume and ensure the stability of the water inlet volume.

[0107] In practice, the dosing pipeline 41 includes:

[0108] The first dosing pipeline 411 and the first dosing pipeline 412 are connected in parallel to the water circulation pipeline 2;

[0109] It is understood that the technical solution provided in this embodiment, by setting up the first dosing pipeline 411 and the first dosing pipeline 412 connected in parallel on the water circulation pipeline 2, can deliver the drug to the water circulation pipeline 2, thereby improving the quality of the circulating water.

[0110] In practical applications, the dosing flow pump 42 includes:

[0111] The first dosing flow pump 421 is installed on the first dosing pipeline 411;

[0112] The second dosing flow pump 422 is installed on the first dosing pipeline 412.

[0113] It is understood that the technical solution provided in this embodiment, by setting a first dosing flow pump 421 on the first dosing pipeline 411 and a second dosing flow pump 422 on the first dosing pipeline 412, can control the dosing amount, avoid drug waste, and improve the quality of circulating water.

[0114] In practice, the dosing tank 4 includes:

[0115] The first dosing tank 43 stores alkaline drugs and is connected to the water circulation pipeline 2 through the first dosing pipeline 411.

[0116] The second dosing tank 44 stores acidic drugs and is connected to the water circulation pipeline 2 through the first dosing pipeline 412.

[0117] It is understood that the technical solution provided in this embodiment, by setting up a first dosing tank 43 and connecting it to the water circulation pipeline 2 through a first dosing pipeline 411, can store and add alkaline drugs to the circulating water pipeline; by setting up a second dosing tank 44 and connecting it to the water circulation pipeline 2 through a first dosing pipeline 412, can store and add acidic drugs to the circulating water pipeline, thereby neutralizing dirt ions in the water and improving the quality of the circulating water.

[0118] In practice, the system also includes:

[0119] A one-way valve 45 is installed on the first dosing line 411 and the first dosing line 412.

[0120] It is understood that the technical solution provided in this embodiment, by setting one-way valves 45 on the first dosing pipeline 411 and the first dosing pipeline 412, can prevent circulating water from flowing back into the dosing tank 4 and ensure the stable operation of the system.

[0121] In practice, the sewage pipe 22 is also equipped with:

[0122] The second flow meter 221 is used to detect the sewage flow rate in the sewage pipe 22;

[0123] The second concentration meter 222 is used to detect the concentration of chemicals in the sewage in the sewage pipe 22;

[0124] The second flow meter 221 and the second concentration meter 222 are both connected to the controller 5.

[0125] It is understood that the technical solution provided in this embodiment, by setting a second flow meter 221 and a second concentration meter 222 on the sewage pipe 22, can determine the amount of drug loss in the sewage, thereby adding drugs to the water circulation pipe 2 in a timely manner to keep the circulating water quality stable.

[0126] In practice, the system also includes:

[0127] The water circulation pipeline 2 is equipped with a drain valve 24, which is connected to the controller 5.

[0128] It is understood that the technical solution provided in this embodiment, by setting an air vent valve 24 on the water circulation pipeline 2 and connecting the air vent valve 24 to the controller 5, can control the working state of the air vent valve 24 to discharge the gas in the water circulation pipeline 2, thereby ensuring the stable operation of the system.

[0129] Example 2

[0130] Figure 2This is a flowchart illustrating a control method for a smart water quality monitoring system according to another exemplary embodiment, including:

[0131] Step S21: Obtain monitoring data from the first water quality monitoring module 21 and the second water quality monitoring module 32;

[0132] Step S22: Based on the monitoring data of the first water quality monitoring module 21, control the working status of the dosing flow pump 42 and the drain valve 23, and based on the monitoring data of the second water quality monitoring module 32, control the water replenishment status of the inlet pipe 31.

[0133] It is understood that the technical solution provided in this embodiment, by acquiring the monitoring data of the first water quality monitoring module 21 and the second water quality monitoring module 32, and controlling the working state of the dosing flow pump 42 and the drain valve 23 based on the monitoring data of the first water quality monitoring module 21, can keep the concentration of drugs in the circulating water stable, remove dirt from the water, and improve the quality of the circulating water; and by controlling the water replenishment state of the inlet pipe 31 based on the monitoring data of the second water quality monitoring module 32, can replenish water to the water circulation pipe 2 in a timely manner, so as to keep the system water supply stable.

[0134] In specific implementation, obtaining the monitoring data from the first water quality monitoring module 21 and the second water quality monitoring module 32 includes:

[0135] The water supply valve 34, the drain valve 23, the air drain valve 24, the first dosing flow pump 421, and the second dosing flow pump 422 are all in the closed state;

[0136] Obtain the conductivity value Φ1 detected by the first conductivity detector 211;

[0137] Obtain the pH value Ψ1 detected by the first pH value detector 212;

[0138] Obtain the concentration value ρ1 detected by the first concentration meter 213;

[0139] Obtain the conductivity value Φ2 detected by the second conductivity detector 321;

[0140] Obtain the pH value Ψ2 detected by the second pH detector 322;

[0141] Determine the target conductivity value as X, the lower limit of pH as Y, and the upper limit of pH as Z. Determine the lower limit of ρ1 as A and the upper limit as B.

[0142] It should be noted that the target conductivity value X, the lower limit pH value Y, the upper limit pH value Z, the lower limit ρ1 value A, and the upper limit ρ1 value B are all set based on empirical values ​​or actual working requirements. For example, the target conductivity value is set as X = 1000, the lower limit pH value Y = 6.8, the upper limit pH value Z = 7, the lower limit ρ1 value A = 12%, and the upper limit ρ1 value B = 25%.

[0143] It is understood that the technical solution provided in this embodiment controls the water supply valve 34, the drain valve 23, the empty valve 24, the first dosing flow pump 421, and the second dosing flow pump 422 to be in a closed state, which can provide a stable environment for circulating water quality testing; by obtaining the above-mentioned test values ​​and setting the above-mentioned preset parameter values, they can be used as a basis for water quality judgment, thereby making reasonable use of drugs and improving water quality in a targeted manner.

[0144] In specific implementation, the step of controlling the working status of the dosing flow pump 42 and the drain valve 23 based on the monitoring data of the first water quality monitoring module 21, and controlling the water replenishment status of the inlet pipeline 31 based on the monitoring data of the second water quality monitoring module 32, includes:

[0145] If the monitoring data meets the first preset condition, the working status of the dosing flow pump 42 and the drain valve 23 is controlled according to the first control strategy.

[0146] If the monitoring data meets the second preset condition, the working status of the dosing flow pump 42 and the drain valve 23 is controlled according to the second control strategy.

[0147] If the monitoring data meets the third preset condition, the working status of the dosing flow pump 42 and the drain valve 23 is controlled according to the third control strategy.

[0148] If the monitoring data meets the fourth preset condition, the working state of the drain valve 23 and the water replenishment state of the inlet pipe 31 are controlled according to the fourth control strategy.

[0149] It is understood that the technical solution provided in this embodiment, by setting four preset conditions and corresponding to four control strategies, can intelligently select the methods of adding chemicals, discharging sewage, and replenishing water, thereby improving the flexibility of the system, improving the quality of circulating water in a targeted manner, and ensuring the stable operation of the system.

[0150] In practice, the first preset conditions are: Φ1≤X, Y≤Ψ1≤Z, A≤ρ1≤B. The control of the operating states of the dosing flow pump 42 and the drain valve 23 according to the first control strategy specifically involves:

[0151] Maintain the current operating state of the system, and keep the dosing flow pump 42 and the drain valve 23 in the closed state.

[0152] It should be noted that when the first preset condition is met, it means that the water quality meets the usage requirements, the system is operating stably, and the water quality parameters are monitored in real time.

[0153] In specific implementation, the second preset conditions are: Φ1>X, Ψ1<Y, ρ1<A. The control of the operating states of the dosing flow pump 42 and the drain valve 23 according to the second control strategy specifically involves:

[0154] Turn on the first dosing flow pump 421, add alkaline reagent to the system to neutralize it, and calculate the system dosing amount;

[0155] Once the target dosage is reached, the first dosing flow pump 421 is turned off, and the total number of dosing operations is recorded once.

[0156] If the cumulative number of dosings is less than the preset number, the current working state of the system is maintained, and the working state of the dosing flow pump 42 and the drain valve 23 remains unchanged.

[0157] If the cumulative number of chemical additions is greater than or equal to the preset number, the cumulative number of chemical additions will be reset to zero, and the drain valve 23 will be opened to enter the drain control. The working status of the drain valve 23 and the water replenishment status of the inlet pipe 31 will be controlled according to the fourth control strategy.

[0158] It should be noted that when the second preset condition is met, it indicates that the conductivity of the circulating water exceeds the standard, the pH is too low, and the concentration of the reagent is too low. This means that the hardness of the water system has increased, the system environment is too acidic, and the reagent in the system has been consumed to the point that it can no longer neutralize the dirt ions and bacteria in the water. At this time, the first dosing flow pump 421 is turned on to add alkaline reagent to the system to neutralize and improve the water quality.

[0159] It should be noted that if the cumulative number of chemical additions is less than the preset number, it means that the scaling level of the system does not affect the system operation. The current working state of the system is maintained, and the working state of the chemical addition flow pump 42 and the drain valve 23 remains unchanged. If the cumulative number of chemical additions is greater than the preset number, it means that there is a lot of scaling in the system, which poses a risk of clogging the water pipe. The cumulative number of chemical additions is reset to zero, and the drain valve 23 is opened to enter the drain control. The working state of the drain valve 23 and the water replenishment state of the inlet pipe 31 are controlled according to the fourth control strategy to discharge the scale in the water and replenish water in time to keep the system water supply stable.

[0160] In specific implementation, the third preset condition is: Φ1>X, Ψ1>Z, ρ1<A. The control of the operating state of the dosing flow pump 42 and the drain valve 23 according to the third control strategy specifically involves:

[0161] Turn on the second dosing flow pump 422 to add acidic reagent to the system for neutralization, and calculate the system dosage;

[0162] Once the target dosage is reached, the second dosing flow pump 422 is turned off, and the total number of dosing operations is recorded once.

[0163] If the cumulative number of dosings is less than the preset number, the current working state of the system is maintained, and the working state of the dosing flow pump 42 and the drain valve 23 remains unchanged.

[0164] If the cumulative number of chemical additions is greater than or equal to the preset number, the cumulative number of chemical additions will be reset to zero, and the drain valve 23 will be opened to enter the drain control. The working status of the drain valve 23 and the water replenishment status of the inlet pipe 31 will be controlled according to the fourth control strategy.

[0165] It should be noted that when the third preset condition is met, it indicates that the conductivity of the circulating water exceeds the standard, the pH is too high, and the concentration of the reagent is too low. This means that the hardness of the water system has increased, the system environment is too alkaline, and the reagent in the system has been consumed to the point that it can no longer neutralize the dirt ions and bacteria in the water. At this time, the second dosing flow pump 422 is turned on to add acidic reagent to the system to neutralize and improve the water quality. The remaining steps are the same as above and will not be repeated here.

[0166] In practice, the target quantity is determined according to the following steps:

[0167] If the dosing flow pump 42 is turned on, the current system records a cumulative number of dosing times of 0, and the target amount is set as the amount of chemicals lost during the most recent sewage discharge, G;

[0168] If the cumulative number of dosing operations recorded by the system is greater than 0 when the dosing flow pump 42 is turned on, the target amount will be determined as the product of the preset dosing ratio d and the amount of chemicals lost during the most recent sewage discharge, d*G.

[0169] It should be noted that the preset dosing ratio d is set based on empirical values ​​and actual work requirements, such as setting the preset dosing ratio to 0.5.

[0170] It is understood that the technical solution provided in this embodiment, when the first, second and third preset conditions are met, adopts the first, second and third control strategies accordingly. It can determine the target amount of dosing based on the cumulative number of dosings and add an appropriate amount of medicine to the water in a timely manner to neutralize dirt ions and bacteria, so that the water quality can meet the usage requirements. According to the fourth control strategy, the working state of the drain valve 23 and the water replenishment state of the inlet pipe 31 can be controlled to discharge a large amount of dirt in the water and replenish water in a timely manner, thereby improving the water quality, ensuring the stability of the system's water supply, and preventing dirt from clogging the water circulation pipe 2.

[0171] Example 3

[0172] Figure 3A flowchart of a control method for a water quality intelligent monitoring system, according to another exemplary embodiment, shows that the fourth preset condition is: Φ1 > X, Ψ1 < Y ​​or Ψ1 > Z, ρ1 > B. Specifically, the working state of the drain valve 23 and the water replenishment state of the inlet pipe 31 according to the fourth control strategy are as follows:

[0173] Step S31: Open the drain valve 23;

[0174] Step S32: Obtain the sewage flow rate Q2 detected by the second flow meter 221;

[0175] Step S33: Obtain the concentration value ρ2 detected by the detector of the second concentration meter 222;

[0176] Step S34: Calculate and record the amount of medicine lost from the sewage system in real time: G = sewage discharge time t * concentration ρ2 * sewage discharge flow rate Q2;

[0177] Step S35: When A≤ρ1≤B, close the drain valve 23, open the water supply valve 34, record the water supply flow rate Q1 detected by the first flow meter 33 in real time, and read the conductivity Φ1 and pH value Ψ1.

[0178] Step S36: If Φ2≥Φ1, the water softener 3 is determined to be faulty. The system prompts to replace the water softener 3. After replacing the water softener 3, continue to add water until Q2=Q1, then close the water inlet valve 34.

[0179] Step S37: If Φ2 < Φ1, continue to add water until Q2 = Q1, then close the water supply valve 34.

[0180] It should be noted that when the fourth preset condition is met, it indicates that the conductivity of the circulating water exceeds the standard, the pH is too low, and the concentration of the reagent is too high. This means that the hardness of the water system has increased, the water volume in the system is insufficient, or there is a lot of residual scale. The actual reagent has reached the upper limit of neutralizing and dissolving the scale, and adding more reagent can no longer play a role. At this time, the drain valve 23 is opened to discharge the dirt from the system, which can improve the water quality and ensure the stable operation of the system.

[0181] It should be noted that the real-time calculation and recording of the amount of chemicals lost from the sewage system, G = sewage time t * concentration ρ2 * sewage flow rate Q2, can serve as the basis for calculating the target amount of chemicals to be added to the system, thereby avoiding waste of chemicals, improving water quality and keeping the acidity and alkalinity of the water stable.

[0182] It should be noted that if Φ2≥Φ1, it means that the metal ion content in the incoming water is too high, and the water softener 3 has not been able to filter out the metal ions. Therefore, the water softener 3 is judged to be faulty and will be prompted. Water can be added again after the water softener 3 is reinstalled.

[0183] It should be noted that if Q2 = Q1, it means that the system's inflow and outflow are equal, and the water volume in the water circulation pipe 2 meets the circulation water demand. At this time, the water supply valve 34 is closed.

[0184] In practice, the control method further includes:

[0185] After water replenishment is complete, open the drain valve 24 and run it for a preset time T, then close the drain valve 24.

[0186] It should be noted that the preset duration T is set based on experience or actual work requirements, such as setting the preset duration T to 5 minutes.

[0187] It should be noted that water intake and sewage discharge can cause gas to enter the system, generating gas pressure that blocks water circulation. Therefore, opening the exhaust valve and running it for a preset time T can empty the gas in the water circulation pipeline 2, ensuring the stable operation of the system.

[0188] Understandably, when the fourth preset condition is met, by adopting the fourth control strategy, the scale in the water circulation pipeline 2 can be discharged, improving the normal operation of the water quality assurance system; the amount of lost chemical dosing can be calculated, providing a basis for the target amount of chemical dosing in the system, avoiding chemical waste, and keeping the acidity and alkalinity of the circulating water in a stable state; water can be replenished to the system in a timely manner, avoiding insufficient circulating water volume due to sewage discharge, thereby ensuring a stable water supply to the system; and by controlling the working state of the exhaust valve, gas in the water circulation pipeline 2 can be discharged, preventing gas pressure from affecting water circulation.

[0189] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0190] If the integrated units in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in the aforementioned computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause one or more computer devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0191] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0192] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between units or modules, and may be electrical or other forms.

[0193] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0194] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0195] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A water quality monitoring system, characterized in that, include: A water heat exchange system, and a water circulation pipeline connecting the input and output ends of the water heat exchange system; a first water quality monitoring module is installed on the water circulation pipeline, and the water heat exchange system is also equipped with a sewage discharge pipeline, on which a sewage discharge valve is installed; A water softener is connected to the water circulation pipeline via an inlet pipe, and a second water quality monitoring module is installed on the inlet pipe. The dosing tank is connected to the water circulation pipeline via a dosing pipeline, and a dosing flow pump is installed on the dosing pipeline. The controller is connected to the first water quality monitoring module, the second water quality monitoring module, the dosing flow pump, and the drain valve, respectively. It is used to control the working status of the dosing flow pump and the drain valve according to the monitoring data of the first water quality monitoring module, and to control the water replenishment status of the inlet pipeline according to the monitoring data of the second water quality monitoring module. The first water quality monitoring module includes: A first conductivity detector is used to detect the conductivity of water in the water circulation pipeline; A first pH detector is used to detect the pH value of the water in the water circulation pipeline; The first concentration meter is used to detect the drug concentration value of the water in the water circulation pipeline; The second water quality monitoring module includes: A second conductivity detector is used to detect the conductivity of water in the inlet pipe; The second pH detector is used to detect the pH value of the water in the inlet pipe; When the conductivity value detected by the first conductivity detector is greater than the target value, the pH value detected by the first pH detector is less than the lower limit or the pH value detected by the first pH detector is greater than the upper limit, and the concentration value detected by the first concentration meter is greater than the upper limit, the drain valve is opened. When the lower limit value is less than or equal to the concentration value detected by the first concentration meter and less than or equal to the upper limit value, close the drain valve and open the water supply valve; If the conductivity value detected by the second conductivity detector is greater than or equal to the conductivity value detected by the first conductivity detector, the water softener is determined to be faulty, and the system prompts to replace the water softener. After replacing the water softener, water should be added again. If the conductivity value detected by the second conductivity detector is less than the conductivity value detected by the first conductivity detector, then water should be added continuously.

2. The system according to claim 1, characterized in that, The water inlet pipe is also equipped with: The first flow meter is installed at the inlet end of the water softener and is connected to the controller; The water supply valve is located upstream of the first flow meter and is connected to the controller.

3. The system according to claim 1, characterized in that, The dosing pipeline includes: a first dosing pipeline and a second dosing pipeline connected in parallel to the water circulation pipeline.

4. The system according to claim 3, characterized in that, The dosing flow pump includes: The first dosing flow pump is installed on the first dosing pipeline; The second dosing flow pump is installed on the second dosing pipeline.

5. The system according to claim 4, characterized in that, The dosing tank includes: The first dosing tank contains alkaline drugs and is connected to the water circulation pipeline through the first dosing pipeline. The second dosing tank contains acidic drugs and is connected to the water circulation pipeline via a second dosing pipeline.

6. The system according to claim 5, characterized in that, Also includes: A one-way valve is installed on the first and second dosing lines.

7. The system according to claim 1, characterized in that, The sewage pipe is also equipped with: The second flow meter is used to detect the flow rate of sewage in the sewage pipeline; The second concentration meter is used to detect the concentration of chemicals in the sewage in the sewage pipeline; The second flow meter and the second concentration meter are respectively connected to the controller.

8. The system according to claim 7, characterized in that, The water circulation pipeline is equipped with a drain valve, which is connected to the controller.

9. A control method for a water quality intelligent monitoring system, characterized in that, The control method using the system according to any one of claims 1 to 8 includes: Acquire monitoring data from the first water quality monitoring module and the second water quality monitoring module; Based on the monitoring data from the first water quality monitoring module, the operating status of the dosing flow pump and the drain valve is controlled, and based on the monitoring data from the second water quality monitoring module, the water replenishment status of the inlet pipeline is controlled.

10. The control method according to claim 9, characterized in that, The acquisition of monitoring data from the first water quality monitoring module and the second water quality monitoring module includes: The water supply valve, drain valve, air drain valve, first dosing flow pump, and second dosing flow pump are all in the closed state; Obtain the conductivity value Φ1 detected by the first conductivity detector; Obtain the pH value Ψ1 detected by the first pH detector; Obtain the concentration value ρ1 detected by the first concentration meter; Obtain the conductivity value Φ2 detected by the second conductivity detector; Obtain the pH value Ψ2 detected by the second pH detector; Determine the target conductivity value as X, the lower limit pH value as Y, and the upper limit pH value as Z. Determine the lower limit ρ1 value as A and the upper limit ρ1 value as B.

11. The control method according to claim 10, characterized in that, The step of controlling the operating status of the dosing flow pump and the drain valve based on the monitoring data of the first water quality monitoring module, and controlling the water replenishment status of the inlet pipeline based on the monitoring data of the second water quality monitoring module, includes: If the monitoring data meets the first preset condition, the working status of the dosing flow pump and the drain valve is controlled according to the first control strategy. If the monitoring data meets the second preset condition, the working status of the dosing flow pump and the drain valve is controlled according to the second control strategy. If the monitoring data meets the third preset condition, the working status of the dosing flow pump and the drain valve is controlled according to the third control strategy. If the monitoring data meets the fourth preset condition, the working state of the drain valve and the water replenishment state of the inlet pipeline are controlled according to the fourth control strategy.

12. The control method according to claim 11, characterized in that, The first preset conditions are: Φ1≤X, Y≤Ψ1≤Z, A≤ρ1≤B. The specific steps for controlling the operating status of the dosing flow pump and the drain valve according to the first control strategy are as follows: Maintain the system's current operating status, and keep the dosing pump and drain valve in the closed position.

13. The control method according to claim 12, characterized in that, The second preset condition is: Φ1 > X, Ψ1 < Y, ρ1 < A. The specific steps for controlling the operating status of the dosing flow pump and the drain valve according to the second control strategy are as follows: Turn on the first dosing pump to add alkaline reagent to the system for neutralization, and calculate the system dosage. Once the target dosage is reached, the first dosing flow pump is turned off, and the total number of dosing operations is counted once. If the cumulative number of dosings is less than the preset number, maintain the current working state of the system and keep the working state of the dosing flow pump and the drain valve unchanged. If the cumulative number of chemical additions is greater than or equal to the preset number, the cumulative number of chemical additions will be reset to zero, and the drain valve will be opened to enter the drain control. The working status of the drain valve and the water replenishment status of the inlet pipeline will be controlled according to the fourth control strategy.

14. The control method according to claim 13, characterized in that, The third preset condition is: Φ1>X, Ψ1>Z, ρ1<A. The specific steps for controlling the operating status of the dosing flow pump and the drain valve according to the third control strategy are as follows: Turn on the second dosing flow pump, add acidic reagent to the system to neutralize it, and calculate the system dosage; Once the target dosage is reached, the second dosing flow pump is turned off, and the total number of dosing operations is recorded as one. If the cumulative number of dosings is less than the preset number, maintain the current working state of the system and keep the working state of the dosing flow pump and the drain valve unchanged. If the cumulative number of chemical additions is greater than or equal to the preset number, the cumulative number of chemical additions will be reset to zero, and the drain valve will be opened to enter the drain control. The working status of the drain valve and the water replenishment status of the inlet pipeline will be controlled according to the fourth control strategy.

15. The control method according to any one of claims 13-14, characterized in that, The target quantity is determined according to the following steps, including: If the cumulative number of dosing operations recorded by the system is 0 when the dosing flow pump is turned on, the target amount is set as the amount of chemicals lost during the most recent sewage discharge, G. If the cumulative number of dosing operations recorded by the system is greater than 0 when the dosing flow pump is turned on, the target amount is determined as the product of the preset dosing ratio d and the amount of chemicals lost during the most recent sewage discharge, d*G.

16. The control method according to claim 15, characterized in that, The fourth preset condition is: Φ1 > X, Ψ1 < Y ​​or Ψ1 > Z, ρ1 > B. Specifically, controlling the working state of the drain valve and the water replenishment state of the inlet pipe according to the fourth control strategy is as follows: Open the drain valve; Obtain the sewage flow rate Q2 detected by the second flow meter; Obtain the concentration value ρ2 detected by the second concentration meter detector; Calculate and record the amount of chemicals lost from the sewage system in real time: G = sewage discharge time t * concentration ρ2 * sewage discharge flow rate Q2; When A≤ρ1≤B, close the drain valve, open the water supply valve, record the water supply flow rate Q1 detected by the first flow meter in real time, and read the conductivity Φ1 and pH value Ψ1. If Φ2≥Φ1, the water softener is determined to be faulty, and the system prompts to replace the water softener. After replacing the water softener, continue to add water until Q2=Q1, then close the water inlet valve. If Φ2 < Φ1, continue to add water until Q2 = Q1, then close the water supply valve.

17. The control method according to claim 16, characterized in that, Also includes: After water replenishment is complete, open the drain valve and run it for a preset time T, then close the drain valve.

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