Control method, system, device and storage medium for pre-chlorination control system

Abstract

The present application provides a control method, system, device and storage medium for a pre-chlorination control system, which determines the target input flow rate of the chlorine-containing solution input to the water inlet point according to the initial chlorine volatilization amount through a pre-chlorination calculation module, and then estimates the time when the water at the water inlet point flows to the water outlet point at the first moment, and uses it as the second moment. The pre-chlorination PLC control module adjusts the initial chlorine volatilization amount based on the chlorine content of the outlet water at the second moment, so that the pre-chlorination calculation module can take into account the large hysteresis of pre-chlorination in the water plant. The pre-chlorination calculation module can more accurately estimate the volatilization amount of chlorination substances such as chlorine gas in the water plant, and feed it back to the pre-chlorination PLC control module to control the chlorination equipment and adjust the input flow rate of the chlorine-containing solution input to the water inlet. Through the cooperation of the pre-chlorination PLC control module and the pre-chlorination calculation module, the pre-chlorination control is more timely and accurate.

Description

Technical Field

[0001] The present application relates to the field of automatic control technology, and in particular to a control method, system, equipment and storage medium for a pre-chlorination control system. Background Art

[0002] In daily life, pre-chlorination disinfection is a key process in tap water treatment. Its goal is to control the chlorine content of the tap water leaving the factory within a specified range. Generally, the pre-chlorination flow rate is adjusted by adjusting the frequency of the chlorination pump inverter to achieve control of the chlorine content of the outlet water.

[0003] In related technologies, the frequency of the chlorination pump inverter is generally adjusted automatically using closed-loop control with feedback. During this closed-loop control process, the chlorine content of the outlet water is first fed back to the PLC via a chlorine analyzer. The PLC then compares the signal with the set outlet chlorine content and uses the built-in PID to adjust the chlorine addition of the chlorination pump. However, since the pre-chlorination treatment of the water plant is located at the water inlet point, it does not immediately change the outlet chlorine content, but rather has a large hysteresis. Therefore, this control method is often less accurate and cannot achieve precise control. Summary of the Invention

[0004] The embodiments of the present application provide a control method, system, device, and storage medium for a pre-chlorination control system, aiming to make pre-chlorination control more timely and accurate.

[0005] In a first aspect, an embodiment of the present application provides a control method for a pre-chlorination control system, which is applied to a pre-chlorination control system of a water plant. The pre-chlorination control system includes a first data acquisition module located at a water inlet of the water plant, a second data acquisition module located at a water outlet of the water plant, a pre-chlorination PLC control module, and a pre-chlorination calculation module. The first data acquisition module and the second data acquisition module are respectively communicated with the pre-chlorination PLC control module, and the pre-chlorination PLC control module is communicated with the pre-chlorination calculation module. The method includes:

[0006] The pre-chlorination PLC control module obtains the set initial chlorine volatilization amount;

[0007] The first data acquisition module obtains the water flow rate and the chlorine content of the water at the water inlet point;

[0008] The pre-chlorination calculation module determines the target input flow rate of the chlorine-containing solution based on the inlet water flow rate, the inlet water chlorine content, the initial chlorine volatilization amount, the set outlet water chlorine content, and the chlorine concentration of the chlorine-containing solution to be added to the water inlet point;

[0009] The pre-chlorination PLC control module controls the chlorination equipment to inject the chlorine-containing solution at the water inlet point according to the target input flow rate;

[0010] The pre-chlorination calculation module uses the moment when the inlet water flow rate and the inlet water chlorine content are obtained as the first moment, and obtains the estimated moment when the water at the water inlet point flows to the water outlet point at the first moment as the second moment;

[0011] The second data acquisition module obtains the chlorine content of the outlet water at the second moment;

[0012] The pre-chlorination calculation module determines the deviation between the outlet water chlorine content and the set outlet water chlorine content;

[0013] The pre-chlorination PLC control module adjusts the initial chlorine volatilization amount based on the chlorine content of the outlet water when the deviation is greater than the preset deviation;

[0014] The pre-chlorination PLC control module returns to execute the step of obtaining the set initial chlorine volatilization amount.

[0015] In some embodiments of the present application, obtaining an estimated time at which water at a water inlet at a first moment flows to a water outlet includes:

[0016] The pre-chlorination calculation module obtains the initial pipe volume of the water pipeline between the water inlet and the water outlet, wherein the water pipeline is used to sequentially connect the water inlet, multiple water purification process tanks and the water outlet;

[0017] The pre-chlorination calculation module obtains the water volume in multiple water purification process tanks;

[0018] The pre-chlorination calculation module determines the sum of the initial pipeline volume and the water volume as the total water volume between the water inlet point and the water outlet point;

[0019] The pre-chlorination calculation module determines an estimated time for water at a water inlet point to flow to a water outlet point at a first moment based on the total water volume, the water inlet flow rate, and the target input flow rate;

[0020] The pre-chlorination calculation module determines an estimated time when water at the water inlet at the first moment flows to the water outlet based on the first moment and the estimated duration.

[0021] In some embodiments of the present application, after obtaining the chlorine content of the outlet water at the second moment, the method further includes:

[0022] The second data acquisition module obtains the water outflow rate of the water outflow point at a second moment;

[0023] The pre-chlorination calculation module detects whether the outlet flow rate is equal to the sum of the inlet flow rate and the target input flow rate;

[0024] If the outlet flow rate is not equal to the sum of the inlet flow rate and the target input flow rate, the pre-chlorination calculation module determines the adjusted total water volume between the water inlet point and the water outlet point based on the outlet flow rate and the estimated duration;

[0025] The pre-chlorination calculation module adjusts the initial pipeline volume based on the difference between the adjusted total water volume and the water volume.

[0026] In some embodiments of the present application, adjusting the initial chlorine volatilization amount based on the chlorine content of the outlet water includes:

[0027] The pre-chlorination calculation module determines the chlorine flow rate in the outlet water based on the outlet water flow rate at the outlet point at the second moment and the outlet water chlorine content;

[0028] The pre-chlorination calculation module determines the chlorine flow rate based on the target input flow rate and the chlorine concentration;

[0029] The pre-chlorination calculation module determines an estimated chlorine flow rate in the influent based on the difference between the outlet flow rate and the target input flow rate and the influent chlorine content;

[0030] The pre-chlorination calculation module subtracts the chlorine flow in the effluent from the sum of the estimated chlorine flow in the influent and the input chlorine flow to obtain the adjusted initial chlorine volatilization amount, so that the pre-chlorination PLC control module adjusts the initial chlorine volatilization amount.

[0031] In some embodiments of the present application, after obtaining the water flow rate and the chlorine content of the water at the water inlet point, the method further includes:

[0032] The pre-chlorination calculation module obtains the flow rate change of the water inlet flow rate;

[0033] The pre-chlorination calculation module performs the step of determining the target input flow rate of the chlorine-containing solution based on the inlet water flow rate, the inlet water chlorine content, the initial chlorine volatilization amount, the set outlet water chlorine content, and the chlorine concentration of the chlorine-containing solution to be input into the water inlet point when the flow rate change is less than or equal to the first preset change;

[0034] When the flow rate change is greater than the first preset change, the pre-chlorination calculation module corrects the initial chlorine volatilization amount based on the flow rate change, and then, based on the corrected initial chlorine volatilization amount, executes the step of determining the target input flow rate of the chlorine-containing solution based on the inlet water flow rate, the inlet water chlorine content, the initial chlorine volatilization amount, the set outlet water chlorine content, and the chlorine concentration of the chlorine-containing solution to be input into the water inlet point, wherein the corrected initial chlorine volatilization amount is negatively correlated with the flow rate change.

[0035] In some embodiments of the present application, after obtaining the water flow rate and the chlorine content of the water at the water inlet point, the method further includes:

[0036] The pre-chlorination calculation module obtains the chlorine content change of the influent chlorine content;

[0037] The pre-chlorination calculation module performs the step of determining the target input flow rate of the chlorine-containing solution based on the inlet flow rate, the inlet chlorine content, the initial chlorine volatilization amount, the set outlet chlorine content, and the chlorine concentration of the chlorine-containing solution to be input into the water inlet point when the chlorine content change is less than or equal to the second preset change;

[0038] When the change in the chlorine content is greater than the second preset change, the pre-chlorination calculation module corrects the initial chlorine volatilization amount based on the change in the chlorine content, and then, based on the corrected initial chlorine volatilization amount, executes the step of determining the target input flow rate of the chlorine-containing solution based on the inlet flow rate, the inlet chlorine content, the initial chlorine volatilization amount, the set outlet chlorine content, and the chlorine concentration of the chlorine-containing solution to be input into the water inlet point, wherein the corrected initial chlorine volatilization amount is positively correlated with the change in chlorine content.

[0039] In some embodiments of the present application, after obtaining the water flow rate and the chlorine content of the water at the water inlet point, the method further includes:

[0040] The first data acquisition module obtains the inlet water temperature at the water inlet point;

[0041] The pre-chlorination calculation module obtains the water temperature change of the inlet water temperature;

[0042] When the water temperature change is less than or equal to a third preset change, the pre-chlorination calculation module executes the step of determining a target input flow rate of the chlorine-containing solution based on the inlet water flow rate, the inlet water chlorine content, the initial chlorine volatilization amount, the set outlet water chlorine content, and the chlorine concentration of the chlorine-containing solution to be input into the water inlet point;

[0043] When the water temperature change is greater than the third preset change, the pre-chlorination calculation module corrects the initial chlorine volatilization amount based on the water temperature change, and then, based on the corrected initial chlorine volatilization amount, executes the step of determining the target input flow rate of the chlorine-containing solution based on the inlet water flow rate, the inlet water chlorine content, the initial chlorine volatilization amount, the set outlet water chlorine content, and the chlorine concentration of the chlorine-containing solution to be input into the water inlet point, wherein the corrected initial chlorine volatilization amount is positively correlated with the water temperature change.

[0044] In a second aspect, an embodiment of the present application provides a pre-chlorination control system, which includes a first data acquisition module located at a water inlet of a waterworks, a second data acquisition module located at a water outlet of the waterworks, a pre-chlorination PLC control module, and a pre-chlorination calculation module. The first data acquisition module and the second data acquisition module are respectively connected to the pre-chlorination PLC control module in communication with each other, and the pre-chlorination PLC control module is connected to the pre-chlorination calculation module in communication with each other.

[0045] The pre-chlorination PLC control module is used to obtain the set initial chlorine volatilization amount;

[0046] The first data acquisition module is used to obtain the water flow rate and chlorine content of the water at the water inlet point;

[0047] The pre-chlorination calculation module is used to determine the target input flow rate of the chlorine-containing solution based on the inlet water flow rate, the inlet water chlorine content, the initial chlorine volatilization amount, the set outlet water chlorine content, and the chlorine concentration of the chlorine-containing solution to be added to the water inlet point;

[0048] The pre-chlorination PLC control module is used to control the chlorination equipment to inject the chlorine-containing solution at the water inlet point according to the target injection flow rate;

[0049] The pre-chlorination calculation module is configured to use the moment when the inlet water flow rate and the inlet water chlorine content are obtained as the first moment, and obtain the estimated moment when the water at the water inlet point at the first moment flows to the water outlet point as the second moment;

[0050] The second data acquisition module is used to obtain the chlorine content of the outlet water at the second moment;

[0051] The pre-chlorination calculation module is used to determine the deviation between the chlorine content of the outlet water and the set chlorine content of the outlet water;

[0052] The pre-chlorination PLC control module is used to adjust the initial chlorine volatilization amount based on the chlorine content of the outlet water when the deviation is greater than the preset deviation, and return to the step of obtaining the set initial chlorine volatilization amount.

[0053] In a third aspect, an embodiment of the present application provides an electronic device, comprising:

[0054] one or more processors;

[0055] Memory; and

[0056] One or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement any one of the above-mentioned control methods for the pre-chlorination control system.

[0057] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, characterized in that a computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in the control method of the pre-chlorination control system described in any one of the above items.

[0058] Beneficial effects of the embodiments of the present application:

[0059] In an embodiment of the present application, the target input flow rate of the chlorine-containing solution input to the water inlet is determined by the pre-chlorination calculation module according to the initial chlorine volatilization amount, and then the moment when the water at the water inlet flows to the water outlet at the first moment is estimated, and as the second moment, the pre-chlorination PLC control module adjusts the initial chlorine volatilization amount based on the chlorine content of the outlet water at the second moment, so that the pre-chlorination calculation module can take into account the large hysteresis of pre-chlorination in the water plant. The pre-chlorination calculation module can more accurately estimate the volatilization amount of chlorine-containing substances such as chlorine gas in the water plant, and feed it back to the pre-chlorination PLC control module to control the chlorination equipment and adjust the input flow rate of the chlorine-containing solution input to the water inlet. Through the cooperation of the pre-chlorination PLC control module and the pre-chlorination calculation module, the pre-chlorination control is more timely and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0061] Figure 1 This is a schematic diagram of an embodiment of a water treatment path in a water plant in an embodiment of the present application;

[0062] Figure 2 This is a schematic diagram of multiple water purification process pools in an embodiment of the present application;

[0063] Figure 3 is another schematic diagram of multiple water purification process tanks in an embodiment of the present application;

[0064] Figure 4 This is another schematic diagram of multiple water purification process pools in an embodiment of the present application;

[0065] Figure 5 This is a flow chart of an embodiment of a control method for a front chlorination control system in an embodiment of the present application;

[0066] Figure 6 This is a schematic diagram of multiple water purification process tanks and water pipelines in an embodiment of the present application;

[0067] Figure 7 This is a schematic structural diagram of an embodiment of a pre-chlorination control system provided in an embodiment of the present application;

[0068] Figure 8 This is a schematic diagram of the terminal structure of an embodiment of the electronic device provided in the embodiments of the present application. DETAILED DESCRIPTION

[0069] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application. In addition, in the description of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0070] First, the water treatment process in the water plant in the embodiment of the present application is introduced.

[0071] Reference Figure 1 , shows a schematic diagram of an embodiment of the water treatment path in a water plant. Figure 1 In the waterworks, the waterworks consists of a water intake pump house, a water inlet point, a water distribution well, multiple water purification process tanks, a water outlet point, a clear water tank, a water intake well, and a water outlet pump house. The water intake pump house is used to draw water from the source. The water from the source passes through the water inlet point, a water distribution well, multiple water purification process tanks, a water outlet point, a clear water tank, a water intake well, and a water outlet pump house. From there, the water outlet pump house is output to the water supply pipeline, completing the water supply function. As can be seen, the multiple water purification process tanks are located between the water inlet and outlet points. Furthermore, the waterworks may also include a water recovery tank, a water recovery pump house, and a sludge pump house for further water recovery and sludge discharge.

[0072] Among them, multiple water purification process pools may include flocculation pools, comprehensive reaction pools, sedimentation pools, filtration pools, etc. The composition and connection methods of multiple water purification process pools vary based on the different water purification processes of the water plant. For example, if the water purification process also includes activated carbon adsorption process, multiple water purification process pools may be as follows: Figure 2 As shown in , multiple water purification process pools include flocculation pools, sedimentation pools, activated carbon adsorption pools, and filtration pools connected in sequence. Taking the water purification process also including ozone disinfection and membrane treatment process as an example, multiple water purification process pools can be as follows Figure 3 As shown in , multiple water purification process tanks include an ozone contact tank, a flocculation tank, a sedimentation tank, a sand filter tank, and a membrane treatment tank connected in sequence.

[0073] Moreover, for the same water purification process, the composition and connection methods of multiple water purification process pools can also be different. Figure 1 The water purification process corresponding to multiple water purification process pools Figure 4 The water purification processes corresponding to the multiple water purification process pools are the same, but Figure 1 and Figure 4 It can be seen that Figure 1 Multiple water purification process pools and Figure 4 The composition and connection methods of multiple water purification process pools are different.

[0074] The complexity of the composition and connection methods of the above-mentioned multiple water purification process pools will make the control of chlorination before the water plant more complicated, making it difficult to establish a more accurate mathematical formula and inconvenient to use general methods for calculation and control. The embodiment provided in this application can more conveniently control the chlorination before the water plant.

[0075] Moreover, in the related technologies, there are high measurement requirements for water flow rate and chlorine content in water, with a large number of measurement points, and high requirements for the accuracy of pre-chlorination control. In the absence of a more accurate mathematical model, only the chlorine content of some water sections is often monitored, but it cannot be used as a control parameter for pre-chlorination.

[0076] While there are some practices using neural network training to create models, their practical application is still immature. Water conditions at intake points are constantly changing, often shifting over time. Consequently, the original training data may no longer be applicable, necessitating adjustments using new datasets—in other words, retraining. Training neural network models is a time-consuming and resource-intensive process, requiring large amounts of data, as well as time for calculation and verification. This approach, however, cannot achieve the desired long-term stability.

[0077] It can be seen that these defects have led to low accuracy of pre-chlorination control in water plants, making it impossible to achieve more precise pre-chlorination control.

[0078] Next, a control method for a pre-chlorination control system provided in an embodiment of the present application is introduced, and the method is applied to a pre-chlorination control system of a water plant.

[0079] In the embodiment of the control method of the pre-chlorination control system of the present application, the pre-chlorination control system is used as the execution subject. The pre-chlorination control system includes a first data acquisition module located at the water inlet of the water plant, a second data acquisition module located at the water outlet of the water plant, a pre-chlorination PLC (Programmable Logic Controller) control module, a pre-chlorination calculation module, and a chlorination device. The first data acquisition module and the second data acquisition module are respectively connected to the pre-chlorination PLC control module in communication, and the pre-chlorination PLC control module is connected to the pre-chlorination calculation module in communication. The pre-chlorination PLC control module is also connected to the chlorination device. For simplicity and ease of description, this execution subject will be omitted in the subsequent method embodiments.

[0080] See also Figure 5 , Figure 5 This is a flow chart of an embodiment of a control method for a pre-chlorination control system provided in an embodiment of the present application. The control method for the pre-chlorination control system includes:

[0081] 501. The pre-chlorination PLC control module obtains the set initial chlorine volatilization amount;

[0082] In the embodiments of the present application, the initial chlorine volatilization rate refers to the chlorine volatilization rate during the process of water flowing from the water inlet to the water outlet. The initial chlorine volatilization rate can be pre-set and stored in the pre-chlorination PLC control module. For example, the initial chlorine volatilization rate can be pre-set to 0. The unit can be mg / h, where mg refers to milligrams and h refers to hours. Because the pre-set initial chlorine volatilization rate may not match the actual situation, the initial chlorine volatilization rate can also be pre-set to an estimated value determined based on experience, which is not limited here.

[0083] 502. The first data acquisition module obtains the water flow rate and the chlorine content of the water at the water inlet point;

[0084] In the embodiment of the present application, the water flow rate at the water inlet point can be measured by a first data acquisition module provided at the water inlet point. The first data acquisition module includes a water flow meter. The unit of the water flow rate can be m 3 / h, that is, 10 3 L / h, where L refers to the volume in liters. The chlorine content of the inlet water at the water inlet point can be measured by a first data acquisition module disposed at the water inlet point. The first data acquisition module includes a water quality detector. The unit of the inlet water chlorine content can be mg / L.

[0085] In some embodiments of the present application, since the amount of chlorine volatilization in the process of water from the water inlet point to the water outlet point will be affected by the water flow rate, chlorine content in the water, water temperature, etc., the residence time of chlorine-doping substances such as chlorine in the water is often not fixed. Therefore, after obtaining the water inlet flow rate and the inlet chlorine content at the water inlet point, the initial chlorine volatilization amount can be corrected based on these influences to make the initial chlorine volatilization amount closer to the actual chlorine volatilization amount, thereby quickly adapting to changes in the inlet water conditions and providing a fast and effective automatic adjustment method for pre-chlorination control.

[0086] Taking the influence of water flow rate as an example, after obtaining the water inlet flow rate and the chlorine content of the water inlet point, it can also include: the pre-chlorination calculation module obtains the flow change of the water inlet flow rate, and the flow change rate can be the difference or ratio of the water inlet flow rate after the change and the water inlet flow rate before the change; when the flow change rate is less than or equal to the first preset change rate, the pre-chlorination calculation module believes that the water inlet flow rate has not undergone a sudden change and will not cause much impact on the actual chlorine volatilization amount, so the initial chlorine volatilization amount may not be corrected, and step 503 and subsequent steps are executed; when the flow change rate is greater than the first preset change rate, the pre-chlorination calculation module believes that the water inlet flow rate has undergone a sudden change and has caused too much impact on the actual chlorine volatilization amount, so the initial chlorine volatilization amount needs to be corrected, and then based on the corrected initial chlorine volatilization amount, step 503 and subsequent steps are executed.

[0087] The corrected initial chlorine volatilization amount is negatively correlated with the flow rate change. Taking the flow rate change as the ratio of the inlet flow rate after the change to the inlet flow rate before the change, the corrected initial chlorine volatilization amount σ' = σ / (Q1' / Q1), where σ refers to the initial chlorine volatilization amount, Q1' refers to the inlet flow rate after the change, Q1 refers to the inlet flow rate before the change, and " / " refers to division. The value of the first preset change is related to the total water volume between the water inlet and outlet points described below. Generally speaking, the larger the total water volume, the less sensitive the actual chlorine volatilization amount is to sudden changes in the inlet flow rate. Therefore, the first preset change can be determined based on the total water volume and is positively correlated with the total water volume.

[0088] Taking the influence of chlorine content in water as an example, after obtaining the water inlet flow rate and the inlet chlorine content at the water inlet point, it can also include: the pre-chlorination calculation module obtains the chlorine content change of the inlet chlorine content, and the chlorine content change can be the difference or ratio between the inlet chlorine content after the change and the inlet chlorine content before the change; when the chlorine content change is less than or equal to the second preset change, the pre-chlorination calculation module considers that the inlet chlorine content has not undergone a sudden change and will not have much impact on the actual chlorine volatilization amount, so the initial chlorine volatilization amount may not be corrected, and step 503 and subsequent steps are executed; when the chlorine content change is greater than the second preset change, the pre-chlorination calculation module considers that the inlet chlorine content has undergone a sudden change and has caused too much impact on the actual chlorine volatilization amount, so the initial chlorine volatilization amount needs to be corrected, and then step 503 and subsequent steps are executed based on the corrected initial chlorine volatilization amount.

[0089] The corrected initial chlorine volatilization is positively correlated with the change in chlorine content. Taking the change in chlorine content as the ratio of the influent chlorine content after the change to the influent chlorine content before the change as an example, the corrected initial chlorine volatilization is σ' = σ × (C1' / C1), where σ refers to the initial chlorine volatilization, C1' refers to the influent chlorine content after the change, C1 refers to the influent chlorine content before the change, and "×" refers to multiplication.

[0090] Taking the influence of water temperature as an example, after obtaining the water flow rate and the chlorine content at the water inlet point, it can also include: a first data acquisition module obtains the water temperature at the water inlet point; a pre-chlorination calculation module obtains the water temperature change of the water temperature, and the water temperature change can be the difference or ratio between the water temperature after the change and the water temperature before the change; when the water temperature change is less than or equal to the third preset change, the pre-chlorination calculation module considers that the water temperature has not suddenly changed and will not have much impact on the actual chlorine volatilization amount, so the initial chlorine volatilization amount may not be corrected, and step 503 and subsequent steps are executed; when the water temperature change is greater than the third preset change, the pre-chlorination calculation module considers that the water temperature has suddenly changed and has caused too much impact on the actual chlorine volatilization amount, so the initial chlorine volatilization amount needs to be corrected, and then step 503 and subsequent steps are executed based on the corrected initial chlorine volatilization amount.

[0091] The corrected initial chlorine volatilization is positively correlated with the water temperature change. For example, if the water temperature change is the ratio of the inlet water temperature after the change to the inlet water temperature before the change, the corrected initial chlorine volatilization is σ' = σ × (T' / T), where σ refers to the initial chlorine volatilization, T' refers to the inlet water temperature after the change, and T1 refers to the inlet water temperature before the change.

[0092] In some embodiments of the present application, if at least two or three of the inlet flow rate, inlet chlorine content, and water temperature change suddenly change, the initial chlorine volatilization amount can be corrected by combining the corresponding at least two or three changes, so that the corrected initial chlorine volatilization amount is closer to the actual chlorine volatilization amount. For example, if both the inlet flow rate and the inlet chlorine content suddenly change, the corrected initial chlorine volatilization amount σ' = σ × (C1' / C1) / (Q1' / Q1). For example, if the inlet flow rate, inlet chlorine content, and water temperature change all suddenly change, the corrected initial chlorine volatilization amount σ' = σ × (C1' / C1) × (T' / T) / (Q1' / Q1).

[0093] In addition, the amount of chlorine volatilization in the process of water flowing from the water inlet point to the water outlet point is also affected by the water purification process, the composition and connection method of multiple water purification process pools, etc. The error in the amount of chlorine volatilization caused by this part of the influence can be corrected by adjusting the initial amount of chlorine volatilization in step 508 below in the embodiment of the present application.

[0094] 503. The pre-chlorination calculation module determines a target input flow rate of the chlorine-containing solution based on the inlet flow rate, the inlet chlorine content, the initial chlorine volatilization amount, the set outlet chlorine content, and the chlorine concentration of the chlorine-containing solution to be added to the water inlet point;

[0095] In the embodiment of the present application, the setting of the chlorine content of the outlet water refers to the expected chlorine content of the water at the outlet point, and its unit can be mg / L. The chlorine-containing solution to be added to the water inlet point refers to the chlorine-containing solution that needs to be added to the water at the water inlet point during the pre-chlorination control, so as to change the actual chlorine content of the water at the outlet point by adding the chlorine-containing solution. The chlorine concentration of the chlorine-containing solution can be 10 4 mg / L. The chlorine concentration of the chlorine-containing solution can be calculated based on the concentration of the chlorine-containing agent in the chlorine-containing solution and the available chlorine content in the chlorine-containing agent. For example, if the chlorine-containing agent is pure sodium hypochlorite, the available chlorine content in the pure sodium hypochlorite is 0.953. If the concentration of the pure sodium hypochlorite in the sodium hypochlorite solution is 5%, then the chlorine concentration in the sodium hypochlorite solution can be 0.953×5%×10 4 The concentration of the chlorine-containing agent in the chlorine-containing solution and the available chlorine content in the chlorine-containing agent can be obtained from the product information of the chlorine-containing solution.

[0096] In some embodiments of the present application, it is assumed that within a unit time dt, the chlorine content of the outlet water = the chlorine content of the inlet water + the chlorine content of the input chlorine-containing solution - the initial chlorine volatilization amount. Therefore, the following relationship (Formula 1) can be established based on this:

[0097] Q2'×C2'=Q1×C1+Q cl ×C-σ

[0098] Among them, Q2' refers to the estimated water flow rate at the water outlet when the water at the water inlet flows to the water outlet, and the unit can be m 3 / h, that is, 10 3 L / h, Q2'=Q1+Q cl C2' refers to the above-mentioned set chlorine content of the outlet water, that is, the chlorine content of the outlet water that should be reached when the water at the water inlet point flows to the water outlet point. Q1 refers to the above-mentioned inlet flow rate, and C1 refers to the above-mentioned inlet chlorine content. cl The target input flow rate is L / h. C is the chlorine concentration of the chlorine-containing solution. σ is the initial chlorine volatilization rate.

[0099] Q2'=Q1+Q cl Substituting into formula 1, we get formula 2 as follows:

[0100] (Q1+Q cl ) × C2' = Q1 × C1 + Q cl ×C-σ

[0101] Substitute the inlet flow rate, inlet chlorine content, initial chlorine volatilization, set outlet chlorine content, and chlorine concentration of the chlorine-containing solution to be added to the inlet point into Formula 2 to calculate the target input flow rate Q of the chlorine-containing solution. cl .

[0102] 504. The front chlorination PLC control module controls the chlorination equipment to inject chlorine-containing solution at the water inlet point according to the target injection flow rate;

[0103] In the embodiments of the present application, the factors affecting the outlet chlorine content and chlorine volatilization are converted, and the relevant influences are transferred to the target input flow rate of the chlorine-containing solution. That is, the chlorine-containing solution is added at the water inlet so that the input flow rate of the chlorine-containing solution is equal to the target input flow rate, thereby adjusting the actual outlet chlorine content of the water at the outlet. It can be seen that when the initial chlorine volatilization amount is accurate, that is, equal to the actual chlorine volatilization amount, if the water at the water inlet flows to the water outlet, the actual outlet chlorine content of the water at the outlet is equal to the set outlet chlorine content.

[0104] 505. The pre-chlorination calculation module uses the moment when the inlet flow rate and the inlet chlorine content are obtained as the first moment, and obtains the estimated moment when the water at the water inlet point at the first moment flows to the water outlet point as the second moment;

[0105] In the embodiments of the present application, when a chlorine-containing solution is added to the water inlet according to a target flow rate, it is necessary to detect whether the actual chlorine content of the water at the water outlet equals the set chlorine content when the water at the water inlet flows to the water outlet. Therefore, it is necessary to estimate the time when the water at the water inlet flows to the water outlet. Specifically, the time when the water at the water inlet flows to the water outlet is used as the first moment, and the estimated time when the water at the water inlet flows to the water outlet is obtained at the first moment.

[0106] In some embodiments of the present application, obtaining the estimated time when water at the water inlet at the first moment flows to the water outlet may include: the pre-chlorination calculation module obtains the initial pipe volume of the water pipeline between the water inlet and the water outlet, the water pipeline being used to sequentially connect the water inlet, the plurality of water purification process tanks, and the water outlet, for example Figure 6 As shown in , the water supply pipeline is used to connect the water inlet, the first water purification process tank, the second water purification process tank, the third water purification process tank, and the water outlet in sequence. The initial pipeline volume can be measured based on the architectural drawings of the water plant; the pre-chlorination calculation module obtains the water volume in multiple water purification process tanks, and the water volume is the sum of the water volumes contained in the multiple water purification process tanks; the pre-chlorination calculation module determines the sum of the initial pipeline volume and the water volume, and uses it as the total water volume between the water inlet and the water outlet, and the total water volume is the total volume of water contained between the water inlet and the water outlet; the pre-chlorination calculation module determines the estimated time for the water at the water inlet at the first moment to flow to the water outlet based on the total water volume, the water inlet flow rate, and the target input flow rate. For example, the estimated time can be the calculation result obtained by dividing the total water volume by the sum of the water inlet flow rate and the target input flow rate; the pre-chlorination calculation module determines the estimated time for the water at the water inlet at the first moment to flow to the water outlet based on the first moment and the estimated time. For example, the estimated time can be the sum of the first moment and the estimated time.

[0107] The water volume in the plurality of water purification process tanks can be obtained based on the liquid level of the water contained in each water purification process tank, for example, the water volume in a single water purification process tank ,in, is the liquid level, It is the horizontal cross-sectional area of ​​the water contained in the water purification process pool at the corresponding liquid level.

[0108] In a further embodiment, since the initial pipe volume measured based on the architectural drawings of the water plant may not be accurate, for example, there may be protrusions or bends in some positions of the water pipeline, which makes the actual volume of the water pipeline inconsistent with the initial pipe volume measured based on the architectural drawings of the water plant, the initial pipe volume can be adjusted to make the initial pipe volume closer to the actual volume of the water pipeline.

[0109] Specifically, after obtaining the chlorine content of the water outlet at the second moment, the method may further include: obtaining the water outlet flow rate at the second moment by a second data acquisition module. The water outlet flow rate at the water outlet can be measured by a second data acquisition module provided at the water outlet. The second data acquisition module includes a water flow meter. The unit of the water outlet flow rate can be m 3 / h, that is, 10 3 L / h; the pre-chlorination calculation module detects whether the water outlet flow rate is equal to the sum of the water inlet flow rate and the target input flow rate; if the water outlet flow rate is not equal to the sum of the water inlet flow rate and the target input flow rate, it indicates that the water at the water outlet point at the second moment is not the water at the water inlet point at the first moment, that is, the above-mentioned estimated duration is inaccurate, the initial pipeline volume is inaccurate, and there is an error. Therefore, the pre-chlorination calculation module can determine the adjusted total water volume between the water inlet point and the water outlet point based on the water outlet flow rate and the estimated duration. For example, the product of the water outlet flow rate and the estimated duration can be used as the adjusted total water volume; the pre-chlorination calculation module adjusts the initial pipeline volume based on the difference between the adjusted total water volume and the water volume. For example, the difference between the adjusted total water volume and the water volume can be used as the adjusted initial pipeline volume, so that the initial pipeline volume is closer to the actual volume of the water supply pipeline. The water outlet flow rate is equal to the sum of the water inlet flow rate and the target input flow rate, indicating that the water at the water outlet at the second moment is the water at the water inlet at the first moment, that is, the above-mentioned estimated duration is accurate, the initial pipeline volume is accurate, and there is no error, so the initial pipeline volume does not need to be adjusted.

[0110] It should be noted that the adjusted initial pipe volume will be closer to the actual volume of the water supply pipeline. Since the set initial pipe volume is often small, the estimated duration will also be small when the initial pipe volume is small. In the initial stage of water treatment in the waterworks, the outflow rate at the water outlet will gradually increase over time and gradually approach the sum of the inflow rate at the water inlet point and the target input flow rate, and finally equal to the sum of the inflow rate at the water inlet point and the target input flow rate. Therefore, as the outflow rate at the water outlet point gradually increases, the estimated duration will gradually increase, so that the adjusted initial pipe volume gradually approaches the actual volume of the water supply pipeline, and eventually equals the actual volume of the water supply pipeline.

[0111] 506. The second data acquisition module obtains the chlorine content of the outlet water at the second moment;

[0112] In an embodiment of the present application, the chlorine content of the outlet water at the outlet point can be measured by a second data acquisition module arranged at the outlet point. The second data acquisition module includes a water quality detector, and the unit of the outlet water chlorine content can be mg / L.

[0113] 507. The pre-chlorination calculation module determines the deviation between the chlorine content of the outlet water and the set chlorine content of the outlet water;

[0114] In the embodiment of the present application, the deviation between the outlet chlorine content and the set outlet chlorine content may be the ratio of the absolute value of the difference between the outlet chlorine content and the set outlet chlorine content to the set outlet chlorine content, which is generally expressed as a percentage.

[0115] 508. When the deviation is greater than the preset deviation, the pre-chlorination PLC control module adjusts the initial chlorine volatilization amount based on the chlorine content of the outlet water;

[0116] In the embodiments of the present application, the preset deviation can be determined based on a pre-set range of outlet water chlorine content. For example, the difference between the maximum and minimum values ​​within the outlet water chlorine content range relative to the minimum value is used as the preset deviation. For example, if the outlet water chlorine content range is 1.0-1.2 mg / L, the preset deviation is 20%.

[0117] In the embodiment of the present application, when the deviation is greater than the preset deviation, the error in determining the chlorine content of the outlet water is large, and the initial chlorine volatilization amount is inaccurate. Therefore, based on the chlorine content of the outlet water, the initial chlorine volatilization amount is adjusted to make the initial chlorine volatilization amount more accurate. When the deviation is less than or equal to the preset deviation, the error in determining the chlorine content of the outlet water is small, and the initial chlorine volatilization amount is more accurate. Therefore, the initial chlorine volatilization amount is not adjusted, and execution returns to step 502.

[0118] In some embodiments of the present application, adjusting the initial chlorine volatilization amount based on the chlorine content of the outlet water may include: the pre-chlorination calculation module determines the chlorine flow rate in the outlet water based on the outlet flow rate Q2 and the outlet chlorine content C2 at the second moment, and the chlorine flow rate in the outlet water may be equal to Q2×C2; the pre-chlorination calculation module determines the chlorine flow rate in the outlet water based on the target input flow rate Q cl , chlorine concentration C, determine the chlorine flow rate, the chlorine flow rate can be equal to Q cl ×C; the pre-chlorination calculation module determines the estimated chlorine flow in the influent based on the difference between the outlet flow and the target input flow (i.e. the estimated influent flow obtained by reverse calculation based on the outlet flow) and the influent chlorine content C1. The estimated chlorine flow in the influent can be equal to (Q2-Q cl )×C1; the pre-chlorination calculation module subtracts the chlorine flow rate in the outlet water from the sum of the estimated chlorine flow rate in the inlet water and the input chlorine flow rate to obtain the adjusted initial chlorine volatilization amount, so that the pre-chlorination PLC control module can adjust the initial chlorine volatilization amount, that is, the adjusted initial chlorine volatilization amount can be equal to (Q2-Q cl ) × C1 + Q cl ×C-Q2×C2.

[0119] It can be seen that the execution of the step of adjusting the initial chlorine volatilization amount based on the chlorine content of the outlet water is also based on the above theory "it is believed that within unit time dt, the chlorine content of the outlet water = the chlorine content of the inlet water + the chlorine content in the chlorine-containing solution input - the initial chlorine volatilization amount".

[0120] 509. The pre-chlorination PLC control module returns to execute the step of obtaining the set initial chlorine volatilization amount.

[0121] In an embodiment of the present application, after adjusting the initial chlorine volatilization amount, the pre-chlorination PLC control module returns to execute step 502 and subsequent steps based on the adjusted initial chlorine volatilization amount to perform a new round of measurement, calculation, control and other processing.

[0122] The technical solution disclosed in the embodiment of the present application determines the target input flow rate of the chlorine-containing solution input to the water inlet point according to the initial chlorine volatilization amount through the pre-chlorination calculation module, and then estimates the time when the water at the water inlet point flows to the water outlet point at the first moment, and uses it as the second moment. The pre-chlorination PLC control module adjusts the initial chlorine volatilization amount based on the chlorine content of the outlet water at the second moment, so that the pre-chlorination calculation module can take into account the large hysteresis of pre-chlorination of the water plant. The pre-chlorination calculation module can more accurately estimate the volatilization amount of chlorine-containing substances such as chlorine gas in the water plant, and feed it back to the pre-chlorination PLC control module to control the chlorination equipment and adjust the input flow rate of the chlorine-containing solution input to the water inlet. Through the cooperation of the pre-chlorination PLC control module and the pre-chlorination calculation module, the pre-chlorination control is more timely and accurate.

[0123] Moreover, since the pre-chlorination and post-purification water treatment process is often composed of multiple different links such as flocculation tanks, comprehensive reaction tanks, sedimentation tanks, and filtration tanks, and there are many links and a large lag, it is not easy to establish a good mathematical formula. Therefore, the technical solution disclosed in the embodiment of the present application establishes a physical model of the above-mentioned series of pre-treatment links such as sedimentation and filtration in water plants, so as to simplify the characteristics of different water purification processes, reduce the complexity of the physical model, and provide an operational basis for the pre-chlorination control of the water plant, so as to quickly update the control parameters according to the control results, making the pre-chlorination control more timely and accurate.

[0124] In some embodiments of the present application, the control method of the pre-chlorination control system in the embodiments of the present application can also be applied to the chlorination links of other systems such as pumping stations, and is not limited here.

[0125] In order to better implement the control method of the front chlorination control system in the embodiment of the present application, based on the control method of the front chlorination control system, the embodiment of the present application also provides a front chlorination control system, such as Figure 7As shown, the pre-chlorination control system 700 includes a first data acquisition module 701 located at the water inlet of the water plant, a second data acquisition module 702 located at the water outlet of the water plant, a pre-chlorination PLC control module 703, a pre-chlorination calculation module 704, and a chlorination device 705. The first data acquisition module 701 and the second data acquisition module 702 are respectively connected to the pre-chlorination PLC control module 703 for communication, and the pre-chlorination PLC control module 703 is connected to the pre-chlorination calculation module 704 for communication.

[0126] The pre-chlorination PLC control module 703 is used to obtain the set initial chlorine volatilization amount;

[0127] The first data acquisition module 701 is used to obtain the water flow rate and chlorine content at the water inlet point;

[0128] The pre-chlorination calculation module 704 is used to determine the target flow rate of the chlorine-containing solution based on the inlet flow rate, the chlorine content of the inlet water, the initial chlorine volatilization amount, the set outlet chlorine content, and the chlorine concentration of the chlorine-containing solution to be added to the water inlet point;

[0129] The pre-chlorination PLC control module 703 is used to control the chlorination equipment 705 to inject chlorine-containing solution at the water inlet point according to the target injection flow rate;

[0130] The pre-chlorination calculation module 704 is configured to use the moment when the inlet flow rate and the inlet chlorine content are obtained as the first moment, and obtain the estimated moment when the water at the water inlet point at the first moment flows to the water outlet point as the second moment;

[0131] The second data acquisition module 702 is used to obtain the chlorine content of the outlet water at the second moment;

[0132] The pre-chlorination calculation module 704 is used to determine the deviation between the chlorine content of the outlet water and the set chlorine content of the outlet water;

[0133] The pre-chlorination PLC control module 703 is used to adjust the initial chlorine volatilization amount based on the chlorine content of the outlet water when the deviation is greater than the preset deviation, and return to the step of obtaining the set initial chlorine volatilization amount.

[0134] The pre-chlorination control system provided in the embodiment of the present application determines the target input flow rate of the chlorine-containing solution input to the water inlet point according to the initial chlorine volatilization amount through the pre-chlorination calculation module 704, and then estimates the time when the water at the water inlet point flows to the water outlet point at the first moment, and uses it as the second moment. The pre-chlorination PLC control module 703 adjusts the initial chlorine volatilization amount based on the chlorine content of the outlet water at the second moment, so that the pre-chlorination calculation module 704 can take into account the large hysteresis of pre-chlorination in the water plant. The pre-chlorination calculation module 704 can more accurately estimate the volatilization amount of chlorine-containing substances such as chlorine gas in the water plant, and feed it back to the pre-chlorination PLC control module 703 to control the chlorination equipment 705 and adjust the input flow rate of the chlorine-containing solution input to the water inlet. Through the cooperation of the pre-chlorination PLC control module 703 and the pre-chlorination calculation module 704, the pre-chlorination control is more timely and accurate.

[0135] In addition to the control method and system for the pre-chlorination control system described above, an embodiment of the present application further provides an electronic device that integrates any of the pre-chlorination control systems provided in the embodiments of the present application. The electronic device includes:

[0136] one or more processors;

[0137] Memory; and

[0138] One or more application programs, wherein the one or more application programs are stored in the memory and configured to cause the processor to execute the steps of any one of the embodiments of the control method for the pre-chlorination control system.

[0139] The present application also provides an electronic device that integrates any of the pre-chlorination control systems provided in the present application. Figure 8 , which shows a schematic diagram of the structure of the electronic device involved in the embodiment of the present application, specifically:

[0140] The electronic device may include one or more processing core processors 801, one or more computer readable storage medium storage units 802, a power supply 803 and an input unit 804. It will be understood by those skilled in the art that Figure 8 The electronic device structure shown in the figure does not constitute a limitation of the electronic device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange components differently.

[0141] The processor 801 is the control center of the electronic device. It connects the various parts of the entire electronic device using various interfaces and lines. By running or executing software programs and / or modules stored in the storage unit 802 and accessing data stored in the storage unit 802, it performs various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. Optionally, the processor 801 may include one or more processing cores; preferably, the processor 801 may integrate an application processor and a modem processor, wherein the application processor primarily processes the operating system, user interface, and application programs, and the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into the processor 801.

[0142] The storage unit 802 can be used to store software programs and modules. The processor 801 executes various functional applications and data processing by running the software programs and modules stored in the storage unit 802. The storage unit 802 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function (such as sound playback or image playback); the data storage area may store data generated based on the use of the electronic device. Furthermore, the storage unit 802 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state memory device. Accordingly, the storage unit 802 may also include a memory controller to provide the processor 801 with access to the storage unit 802.

[0143] The electronic device also includes a power supply 803 for supplying power to various components. Preferably, the power supply 803 can be logically connected to the processor 801 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The power supply 803 can also include one or more DC or AC power supplies, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and other arbitrary components.

[0144] The electronic device may further include an input unit 804, which may be configured to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0145] Although not shown, the electronic device may further include a display unit, etc., which will not be described in detail herein. Specifically, in the embodiment of the present application, the processor 801 in the electronic device loads the executable files corresponding to one or more application processes into the storage unit 802 according to the following instructions, and the processor 801 runs the application stored in the storage unit 802, thereby implementing the steps of any of the control methods for the pre-chlorination control system provided in the embodiments of the present application.

[0146] To this end, embodiments of the present application provide a computer-readable storage medium, which may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. The computer-readable storage medium stores a plurality of instructions that can be loaded by a processor to execute the steps of any of the control methods for a pre-chlorination control system provided in embodiments of the present application.

[0147] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0148] The control method, system, device and storage medium of a pre-chlorination control system provided in the embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the ideas of the present application, there may be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present application.

Claims

1. A control method for a pre-chlorination control system, characterized in that: The method is applied to a pre-chlorination control system of a water plant, the pre-chlorination control system comprising a first data acquisition module located at a water inlet of the water plant, a second data acquisition module located at a water outlet of the water plant, a pre-chlorination PLC control module, and a pre-chlorination calculation module, wherein the first data acquisition module and the second data acquisition module are respectively connected to the pre-chlorination PLC control module in communication with each other, and the pre-chlorination PLC control module is connected to the pre-chlorination calculation module in communication with each other, and the method comprises: The pre-chlorination PLC control module obtains the set initial chlorine volatilization amount; The first data acquisition module obtains the water flow rate and the chlorine content of the water at the water inlet point; The pre-chlorination calculation module determines the target input flow rate of the chlorine-containing solution based on the inlet water flow rate, the inlet water chlorine content, the initial chlorine volatilization amount, the set outlet water chlorine content, and the chlorine concentration of the chlorine-containing solution to be added to the water inlet point; The pre-chlorination PLC control module controls the chlorination equipment to inject the chlorine-containing solution at the water inlet point according to the target input flow rate; The pre-chlorination calculation module uses the moment when the inlet water flow rate and the inlet water chlorine content are obtained as the first moment, and obtains the estimated moment when the water at the water inlet point flows to the water outlet point at the first moment as the second moment; The second data acquisition module obtains the chlorine content of the outlet water at the second moment; The pre-chlorination calculation module determines the deviation between the outlet water chlorine content and the set outlet water chlorine content; The pre-chlorination PLC control module adjusts the initial chlorine volatilization amount based on the chlorine content of the outlet water when the deviation is greater than the preset deviation; The pre-chlorination PLC control module returns to execute the step of obtaining the set initial chlorine volatilization amount.

2. The control method of the pre-chlorination control system according to claim 1, characterized in that: The step of obtaining an estimated time at which water at the water inlet point flows to the water outlet point at a first moment includes: The pre-chlorination calculation module obtains the initial pipe volume of the water pipeline between the water inlet and the water outlet, wherein the water pipeline is used to sequentially connect the water inlet, multiple water purification process tanks and the water outlet; The pre-chlorination calculation module obtains the water volume in multiple water purification process tanks; The pre-chlorination calculation module determines the sum of the initial pipeline volume and the water volume as the total water volume between the water inlet point and the water outlet point; The pre-chlorination calculation module determines an estimated time for water at a water inlet point to flow to a water outlet point at a first moment based on the total water volume, the water inlet flow rate, and the target input flow rate; The pre-chlorination calculation module determines an estimated time when water at the water inlet at the first moment flows to the water outlet based on the first moment and the estimated duration.

3. The control method of the pre-chlorination control system according to claim 2, characterized in that: After obtaining the chlorine content of the outlet water at the second moment, the method further includes: The second data acquisition module obtains the water outflow rate of the water outflow point at a second moment; The pre-chlorination calculation module detects whether the outlet flow rate is equal to the sum of the inlet flow rate and the target input flow rate; If the outlet flow rate is not equal to the sum of the inlet flow rate and the target input flow rate, the pre-chlorination calculation module determines the adjusted total water volume between the water inlet point and the water outlet point based on the outlet flow rate and the estimated duration; The pre-chlorination calculation module adjusts the initial pipeline volume based on the difference between the adjusted total water volume and the water volume.

4. The control method of the pre-chlorination control system according to claim 1, characterized in that: The adjusting the initial chlorine volatilization amount based on the chlorine content of the outlet water comprises: The pre-chlorination calculation module determines the chlorine flow rate in the outlet water based on the outlet water flow rate at the outlet point at the second moment and the outlet water chlorine content; The pre-chlorination calculation module determines the input chlorine flow rate based on the target input flow rate and the chlorine concentration; The pre-chlorination calculation module determines an estimated chlorine flow rate in the influent based on the difference between the outlet flow rate and the target input flow rate and the influent chlorine content; The pre-chlorination calculation module subtracts the chlorine flow in the effluent from the sum of the estimated chlorine flow in the influent and the input chlorine flow to obtain the adjusted initial chlorine volatilization amount, so that the pre-chlorination PLC control module adjusts the initial chlorine volatilization amount.

5. The control method of the pre-chlorination control system according to claim 1, characterized in that: After obtaining the water flow rate and the chlorine content of the water at the water inlet point, the method further includes: The pre-chlorination calculation module obtains the flow rate change of the water inlet flow rate; The pre-chlorination calculation module performs the step of determining the target input flow rate of the chlorine-containing solution based on the inlet water flow rate, the inlet water chlorine content, the initial chlorine volatilization amount, the set outlet water chlorine content, and the chlorine concentration of the chlorine-containing solution to be input into the water inlet point when the flow rate change is less than or equal to the first preset change; When the flow rate change is greater than the first preset change, the pre-chlorination calculation module corrects the initial chlorine volatilization amount based on the flow rate change, and then, based on the corrected initial chlorine volatilization amount, executes the step of determining the target input flow rate of the chlorine-containing solution based on the inlet water flow rate, the inlet water chlorine content, the initial chlorine volatilization amount, the set outlet water chlorine content, and the chlorine concentration of the chlorine-containing solution to be input into the water inlet point, wherein the corrected initial chlorine volatilization amount is negatively correlated with the flow rate change.

6. The control method of the pre-chlorination control system according to claim 1, characterized in that: After obtaining the water flow rate and the chlorine content of the water at the water inlet point, the method further includes: The pre-chlorination calculation module obtains the chlorine content change of the influent chlorine content; The pre-chlorination calculation module performs the step of determining the target input flow rate of the chlorine-containing solution based on the inlet flow rate, the inlet chlorine content, the initial chlorine volatilization amount, the set outlet chlorine content, and the chlorine concentration of the chlorine-containing solution to be input into the water inlet point when the chlorine content change is less than or equal to the second preset change; When the change in the chlorine content is greater than the second preset change, the pre-chlorination calculation module corrects the initial chlorine volatilization amount based on the change in the chlorine content, and then, based on the corrected initial chlorine volatilization amount, executes the step of determining the target input flow rate of the chlorine-containing solution based on the inlet flow rate, the inlet chlorine content, the initial chlorine volatilization amount, the set outlet chlorine content, and the chlorine concentration of the chlorine-containing solution to be input into the water inlet point, wherein the corrected initial chlorine volatilization amount is positively correlated with the change in chlorine content.

7. The control method of the pre-chlorination control system according to claim 1, characterized in that: After obtaining the water flow rate and the chlorine content of the water at the water inlet point, the method further includes: The first data acquisition module obtains the inlet water temperature at the water inlet point; The pre-chlorination calculation module obtains the water temperature change of the inlet water temperature; When the water temperature change is less than or equal to a third preset change, the pre-chlorination calculation module executes the step of determining a target input flow rate of the chlorine-containing solution based on the inlet water flow rate, the inlet water chlorine content, the initial chlorine volatilization amount, the set outlet water chlorine content, and the chlorine concentration of the chlorine-containing solution to be input into the water inlet point; When the water temperature change is greater than the third preset change, the pre-chlorination calculation module corrects the initial chlorine volatilization amount based on the water temperature change, and then, based on the corrected initial chlorine volatilization amount, executes the step of determining the target input flow rate of the chlorine-containing solution based on the inlet water flow rate, the inlet water chlorine content, the initial chlorine volatilization amount, the set outlet water chlorine content, and the chlorine concentration of the chlorine-containing solution to be input into the water inlet point, wherein the corrected initial chlorine volatilization amount is positively correlated with the water temperature change.

8. A pre-chlorination control system, characterized in that: The pre-chlorination control system includes a first data acquisition module located at the water inlet of the water plant, a second data acquisition module located at the water outlet of the water plant, a pre-chlorination PLC control module, and a pre-chlorination calculation module. The first data acquisition module and the second data acquisition module are respectively connected to the pre-chlorination PLC control module for communication, and the pre-chlorination PLC control module is connected to the pre-chlorination calculation module for communication. The pre-chlorination PLC control module is used to obtain the set initial chlorine volatilization amount; The first data acquisition module is used to obtain the water flow rate and chlorine content of the water at the water inlet point; The pre-chlorination calculation module is used to determine the target input flow rate of the chlorine-containing solution based on the inlet water flow rate, the inlet water chlorine content, the initial chlorine volatilization amount, the set outlet water chlorine content, and the chlorine concentration of the chlorine-containing solution to be added to the water inlet point; The pre-chlorination PLC control module is used to control the chlorination equipment to inject the chlorine-containing solution at the water inlet point according to the target injection flow rate; The pre-chlorination calculation module is configured to use the moment when the inlet water flow rate and the inlet water chlorine content are obtained as the first moment, and obtain the estimated moment when the water at the water inlet point at the first moment flows to the water outlet point as the second moment; The second data acquisition module is used to obtain the chlorine content of the outlet water at the second moment; The pre-chlorination calculation module is used to determine the deviation between the chlorine content of the outlet water and the set chlorine content of the outlet water; The pre-chlorination PLC control module is used to adjust the initial chlorine volatilization amount based on the chlorine content of the outlet water when the deviation is greater than the preset deviation, and return to the step of obtaining the set initial chlorine volatilization amount.

9. An electronic device, characterized in that: The electronic device comprises: one or more processors; Memory; and One or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the control method of the pre-chlorination control system according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps of the control method of the pre-chlorination control system according to any one of claims 1 to 7.

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