Automatic switching control method and system for liquid chlorine storage tank feeding and discharging

Abstract

The application discloses a kind of liquid chlorine storage tank inlet and outlet material automatic switching control method and system, existing switching is not timely, cause pipeline pressure to be kept up or downstream material to be cut off, thereby causing leakage or fire problem that liquid chlorine storage tank switching relies on manual table mode.The method comprises collecting parameter information in each storage tank;According to the selection parameter information, the selection probability of each standby storage tank in the current selection period is calculated, and the optimal standby storage tank to be switched is selected out;When the storage tank meets the slotting condition, control is carried out to switch.The application accurately tracks and calculates the liquid level, pressure and valve state of each part of the multiple liquid chlorine storage tanks, thereby greatly reducing the difficulty of frequent switching of the multiple liquid chlorine storage tanks, and finally realizing the full-automatic switching of the entire liquid chlorine storage tank system in a precise and orderly manner and intelligently.Improving the work efficiency of operators, precise alignment, intelligent error prevention and fully-automatic process switching are realized.

Description

Technical Field

[0001] This invention relates to the field of chemical production technology, and in particular to an automatic switching control method and system for the inlet and outlet of a liquid chlorine storage tank. Background Technology

[0002] In current continuous chlor-alkali production plants, liquid chlorine storage and transportation processes typically involve high / low level alarm interlocks in the storage tanks. These interlocks are triggered by shutting off the inlet / outlet valves before the storage tank, ensuring the current tank level does not exceed the limit. Simultaneously, to prevent upstream compressor overpressure or downstream pump cavitation and thus avoid exceeding storage tank level limits, the liquid chlorine storage tank is usually switched to another tank with inlet or outlet capabilities once the target level is reached within an operating cycle. Furthermore, the inlet / outlet valves of these tanks are generally operated by personnel in the control room or on-site. Therefore, if the high / low level alarm interlock automatically shuts off the inlet / outlet valve of the tank, and the inlet valves of other tanks are not opened manually in time, it can easily lead to pipeline pressure buildup or downstream material interruption, causing pipeline damage, compressor shutdown, pump cavitation wear, and in severe cases, leaks or even fires. Furthermore, the need for manual periodic inspection and switching of multiple liquid chlorine storage tanks increases the frequency of manual operation and human negligence, which can lead to alarms and interlocks. Summary of the Invention

[0003] This invention primarily addresses the problem that existing liquid chlorine storage tank switching relies on manual monitoring, which can lead to untimely switching, causing pipeline pressure buildup or downstream material interruption, resulting in leaks or fires. It provides an automatic switching control method and system for liquid chlorine storage tank inlet and outlet.

[0004] The above-mentioned technical problem of the present invention is mainly solved by the following technical solution: an automatic switching control method for the inlet and outlet of a liquid chlorine storage tank, comprising the following steps:

[0005] Collect parameter information from each storage tank;

[0006] The selection probability of each backup storage tank within the current selection period is calculated based on the selection parameter information, and the optimal backup storage tank to be switched is selected.

[0007] When the storage tank meets the slotting conditions, the control switches.

[0008] This invention significantly reduces the difficulty of frequent switching between multiple liquid chlorine storage tanks by accurately and in real-time tracking and calculating the liquid level, pressure, and valve status of various parts of the tanks. Ultimately, it enables the entire liquid chlorine storage system to achieve precise, orderly, and intelligent fully automatic switching. This improves operator efficiency and achieves precise alignment, intelligent error prevention, and fully automated process switching.

[0009] This invention intelligently selects backup storage tanks. During the switching process between multiple liquid chlorine storage tanks, it employs a roulette wheel algorithm to select the backup tank with the highest cumulative probability. This selection is recalculated in each cycle, achieving rolling optimization. This invention significantly reduces the risks associated with manual tank switching in the entire liquid chlorine storage system and improves operator efficiency. When a storage tank meets the switching conditions, the invention automatically opens or closes the corresponding valves of the backup storage tanks sequentially according to the algorithm, achieving automatic tank switching and automated control.

[0010] As a preferred embodiment, the collected parameter information includes the storage tank level, pressure, temperature, and status information of the pressure balancing valve, waste chlorine valve, connecting valve, inlet valve, and outlet valve.

[0011] As a preferred embodiment, the calculation of the selection probability of each spare storage tank within the current selection period based on the selection parameter information includes:

[0012] The suitability f(x) of the spare storage tank is obtained based on the selected parameter information. i );

[0013] The probability of selecting a backup storage tank, p(x), is calculated based on its suitability. i ),

[0014]

[0015] Where N is the number of selection cycles, f j The probability of selecting the backup storage tank in each selection cycle;

[0016] Calculate the cumulative probability q(x) based on the probability of selecting the backup storage tank. i ),

[0017]

[0018] The cumulative probability is used as the selection probability of the backup storage tank in the current selection period.

[0019] This scheme uses cumulative probability as the selection probability of the backup storage tank. The cumulative probability represents the sum of the selection probabilities of each backup storage tank in all previous selection cycles, which is equivalent to the span on a turntable. The larger the span, the easier it is to select. If a backup storage tank is not selected, it is the optimal backup storage tank. After each judgment cycle, the higher its cumulative probability, the higher its probability of being selected. This can effectively avoid backup storage tanks not being selected for a long time, so that each backup storage tank can be selected in turn.

[0020] As a preferred embodiment, obtaining the suitability of the backup storage tank based on the selected parameter information includes:

[0021] The selected parameter information includes storage tank pressure and temperature information, as well as the status information of the balancing valve, waste chlorine valve, and connecting valve.

[0022] Divide the range of each selected parameter information, set a corresponding sub-applicability sub-value for each range, and construct an applicability reference table;

[0023] Obtain the selection parameter information, obtain the sub-application value corresponding to the selection parameter information according to the application reference table, and sum the obtained sub-application values ​​to obtain the application.

[0024] This scheme first establishes a suitability reference table based on the storage tank pressure and temperature information, and the status information of the balancing valve, waste chlorine valve, and connecting valve. The pressure and temperature are divided into several intervals, and the balancing valve, waste chlorine valve, and connecting valve are divided into open and closed states. For each selection parameter of the standby storage tank, a corresponding sub-suitability value can be obtained from the suitability reference table. The suitability values ​​of all selection parameters are summed to obtain the suitability of the standby storage tank. The suitability is a dynamically changing value; generally, the suitability of each standby storage tank is calculated at the beginning of the selection cycle and used as the suitability for the entire selection cycle.

[0025] As a preferred approach, the selection probability of all standby storage tanks is recalculated for each selection cycle.

[0026] The selection probability of the backup storage tank is optimized through rolling optimization to achieve intelligent selection. Once a backup storage tank is selected, it is removed from the backup storage tank set and is no longer considered for selection.

[0027] As a preferred embodiment, the selection of the optimal backup storage tank to be switched over includes:

[0028] Each spare storage tank is classified according to its feeding and discharging functions;

[0029] Based on the material inlet and outlet status of the storage tank to be switched, the optimal backup storage tank to be switched is selected from the corresponding backup storage tank inlet and outlet categories. The selection method adopts the roulette wheel algorithm.

[0030] In this scheme, when the liquid level in the feeding tank reaches the tank-cutting condition, the optimal backup tank is selected from the backup tanks in the feeding category. Similarly, when the liquid level in the discharging tank reaches the tank-cutting condition, the optimal backup tank is selected from the backup tanks in the discharging category. The backup tanks in the feeding and discharging categories must meet certain settings. The liquid level in the feeding category backup tank must be below the lower limit of the tank level, and the tank pressure must be within the set pressure range for the feeding tank. Likewise, the liquid level in the discharging category backup tank must be above the upper limit of the tank level, and the tank pressure must be within the set pressure range for the discharging tank. The upper and lower limits of the tank level and the pressures of the feeding and discharging tanks are set parameters, input by the operator on the control module. Within a selection cycle, the selected optimal backup tank is deleted from the backup tank set, and a new optimal backup tank to be switched to must be selected. This selection is made from the remaining backup tanks in the feeding and discharging categories using a roulette wheel selection algorithm.

[0031] As a preferred option, the selection of the optimal backup storage tank also includes assessing the condition of the backup storage tank, including:

[0032] Determine if the selection probability is zero. If it is, determine that there is no alternative storage tank and output an alarm. If not, proceed to the step of selecting the optimal alternative storage tank.

[0033] As a preferred embodiment, after switching the storage tank to the optimal backup storage tank, the method also includes determining the post-switching status, including:

[0034] Determine if the pressure information fed back from the storage tank is normal. If yes, proceed to the next step; otherwise, output an alarm.

[0035] Determine if the liquid level in the storage tank has changed. If yes, proceed to the next step; otherwise, output an alarm. Determine if the material has changed based on the liquid level change information after switching.

[0036] If the pressure information is normal and the liquid level changes, it is determined that the standby storage tank is in normal operation. The inlet and outlet valves of the previously operating storage tank are closed to complete the switching.

[0037] This plan allows the inlet and outlet valves of the operating storage tank to be closed only after the backup storage tank is in normal operation, in order to avoid upstream pressure buildup and downstream material shortage.

[0038] An automatic switching control system for the inlet and outlet of a liquid chlorine storage tank includes,

[0039] The sensor module collects various parameter information within the storage tank;

[0040] Inlet and outlet valves, including inlet valves and outlet valves, are installed at the inlet and outlet of the storage tank respectively, and the storage tank is switched according to the control signal;

[0041] The control module calculates the optimal backup storage tank based on parameter information and outputs a control signal to perform the switching operation when the current storage tank meets the tank switching conditions.

[0042] As a preferred option, it also includes an intelligent graphical design platform and a server, with the intelligent graphical design platform connected to the server and the server connected to the control module.

[0043] The server and control module are connected to the Ethernet, establishing a physical data communication link between them. The intelligent graphical design platform achieves this physical link through the server and control module. The control system program and set parameters are written on the intelligent graphical design platform, and then sent to the control module via the server. The control module is configured with a data input port, which displays a user-friendly parameter setting interface for easy parameter input by operators. The parameter setting interface includes upper and lower limits for liquid level and pressure, as well as settings for the switches of each storage tank. The intelligent graphical design platform uses the ZKTeco APC-Suite graphical 3.0 platform, and the server is an OPC server. This solution simplifies deployment; data acquisition for the entire system can be completed using OPC, and the intelligent graphical design platform facilitates the construction of the entire control framework without requiring additional hardware. Different control methods for different operating conditions can be programmed using scripting languages. The operation screen is intuitive and clean, allowing operators to easily achieve automatic control of liquid chlorine storage tank switching without manual intervention.

[0044] Therefore, the advantages of the present invention are:

[0045] 1. By accurately and in real-time tracking and calculating the liquid level, pressure, and valve status of multiple liquid chlorine storage tanks, the difficulty of frequently switching between multiple liquid chlorine storage tanks is greatly reduced, ultimately enabling the entire liquid chlorine storage tank system to achieve fully automatic switching in a precise, orderly, and intelligent manner.

[0046] 2. Improves operator efficiency by enabling precise alignment, intelligent error prevention, and fully automated process switching.

[0047] 3. Intelligent selection of backup storage tank: During the switching process of multiple liquid chlorine storage tanks, the backup storage tank is selected by using a roulette wheel algorithm to extract the backup storage tank with the highest cumulative probability. The selection is recalculated in each selection cycle to achieve rolling optimization. Attached Figure Description

[0048] Figure 1 This is a flowchart illustrating the method of the present invention;

[0049] Figure 2 This is a graph showing the change in liquid chlorine storage tank level before the system of this invention is put into operation;

[0050] Figure 3 This is a graph showing the change in liquid chlorine storage tank level after the system of this invention has been put into operation.

[0051] Figure 4 This is a structural block diagram of the system of the present invention.

[0052] 1-Sensor module 2-Control module 3-Inlet / outlet valve 4-Server 5-Intelligent image-based design platform. Detailed Implementation

[0053] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0054] Example:

[0055] This embodiment describes an automatic switching control system for the inlet and outlet of a liquid chlorine storage tank, such as... Figure 4 As shown, it includes a sensor module 1, a control module 2, inlet and outlet valves 3, a server 4, and an intelligent image design platform 5.

[0056] The inlet and outlet valves are specifically the inlet and outlet valves installed at the inlet and outlet of each liquid chlorine storage tank. The inlet and outlet valves are dual valves consisting of two valve bodies connected in series. The liquid chlorine storage tanks are also equipped with pressure balancing valves, waste chlorine valves, and connecting valves. Each valve is connected to the control module via cables and is remotely controlled by the control module.

[0057] The sensor module specifically includes a remote-type level gauge, pressure gauge, thermometer, and various valves. The sensor module collects information on the liquid level, pressure, and temperature of the storage tank, as well as the opening and closing status information of the pressure balancing valve, waste chlorine valve, connecting valve, inlet valve, and outlet valve. The information is transmitted to the control module via cable.

[0058] The control module employs a DCS controller, and the entire system control is implemented on the DCS controller using a host computer approach. A physical data communication link is established between the server and the control module. The intelligent graphical design platform also achieves this physical data communication link through the server. The DCS controller features a user-friendly HMI interface, allowing input of control parameters and display of the desired control objectives. The control module connects to the intelligent graphical design platform via an OPC server. The intelligent graphical design platform utilizes the ZKTeco APC-Suite graphical 3.0 platform. The control system program and parameter settings are written on this platform, and the control program is then sent to the control module via the server.

[0059] The settings interface includes upper and lower limits for liquid level and pressure, as well as settings for the switches of each storage tank. Parameter settings are shown in Table 1.

[0060] Feeding Discharge Upper limit of storage tank liquid level Upper limit of storage tank liquid level Lower limit of storage tank level Lower limit of storage tank level Storage tank pressure Storage tank pressure Storage tank control switch Storage tank control switch

[0061] Table 1

[0062] Feeding:

[0063] Upper limit of storage tank level: When the feed reaches this set value, the tank cutting will begin.

[0064] Lower limit of storage tank level: The level of the standby storage tank must be lower than this set value.

[0065] Storage tank pressure: The pressure of the standby storage tank must meet the set value range.

[0066] Storage tank control switch: Sets whether the storage tank is in use and participates in feeding / discharging.

[0067] Output:

[0068] Upper limit of liquid level in the storage tank: The liquid level in the standby storage tank must be higher than this set value.

[0069] Lower limit of storage tank level: When the feed reaches this set value, the tank cutting begins.

[0070] Storage tank pressure: The pressure of the standby storage tank must meet the set value range.

[0071] Storage tank control switch: Sets whether the storage tank is in use and participates in feeding / discharging.

[0072] The system corresponding to this embodiment also includes an automatic switching control method for the inlet and outlet of a liquid chlorine storage tank, such as... Figure 1 As shown, it includes the following steps:

[0073] Step 1: Collect parameter information from each storage tank, including tank level, pressure, temperature, and status information of pressure balancing valve, waste chlorine valve, connecting valve, inlet valve, and outlet valve.

[0074] Step 2: Determine if there is a storage tank that is currently feeding / discharging. If not, repeat the current determination. If yes, proceed to the next step.

[0075] Step 3: Obtain all spare storage tanks and calculate the availability of spare storage tanks for the currently selected period. The process includes:

[0076] The selected parameter information includes storage tank pressure and temperature information, as well as the status information of the balancing valve, waste chlorine valve, and connecting valve.

[0077] The selection parameter information is divided into ranges, and a corresponding sub-application value is set for each range. An application reference table is constructed, as shown in Table 2.

[0078]

[0079] Table 2

[0080] Obtain the selection parameter information, and according to the suitability reference table, obtain the corresponding sub-suitability values ​​for the selection parameter information. Summate the obtained sub-suitability values ​​to obtain the suitability score. For example, for a certain inlet / outlet standby storage tank, the pressure is 0.08, the temperature is 130, the balance valve is ON, the waste chlorine valve is OFF, and the connecting valve is OFF. Then the suitability score f(x) is... i = 1 + 2 + 1 + 0 + 0 = 4. Since the selection parameter information changes constantly, the suitability is a dynamically changing value. Each spare storage tank generally calculates its suitability at the beginning of the selection cycle, which is then used as the suitability for the entire selection cycle.

[0081] The probability of selecting a backup storage tank, p(x), is calculated based on its suitability. i ),

[0082]

[0083] Where N is the number of selection cycles, f j The probability of selecting the backup storage tank in each selection cycle;

[0084] Calculate the cumulative probability q(x) based on the probability of selecting the backup storage tank. i ),

[0085]

[0086] The cumulative probability is used as the selection probability of the backup storage tank in the current selection period.

[0087] The cumulative probability is used as the selection probability of the backup storage tank. The cumulative probability is the sum of the selection probabilities of each backup storage tank in all previous selection cycles, which is equivalent to the span on a turntable. The larger the span, the easier it is to select. Moreover, the selection probabilities of all backup storage tanks are recalculated after each selection cycle, and the selection probabilities of backup storage tanks are optimized in a rolling manner to achieve the purpose of intelligent selection.

[0088] Step 4: Assess the status of the backup storage tank, including:

[0089] Determine if the selection probability is zero. If yes, determine that there is no alternative backup storage tank and output an alarm. If no, proceed to the next step.

[0090] Step 5: Select the optimal backup storage tank to be switched over, including:

[0091] Each spare storage tank is classified according to its feeding and discharging functions;

[0092] Based on the material inlet and outlet status of the storage tank to be switched, the optimal backup storage tank to be switched is selected from the corresponding backup storage tank inlet and outlet categories. The selection method adopts the roulette wheel algorithm.

[0093] The standby storage tanks for inlet and outlet sorting must meet the following settings: The liquid level in the inlet sorting standby storage tank must be below the lower limit, and the tank pressure must be within the set pressure range for the inlet storage tank. Similarly, the liquid level in the outlet sorting standby storage tank must be above the upper limit, and the tank pressure must be within the set pressure range for the outlet storage tank. The upper and lower limits of the storage tank liquid level, and the inlet and outlet storage tank pressures are set parameters, input by the operator on the control module. Once a standby storage tank is selected, it is removed from the standby storage tank set and will no longer be considered for selection until it is set as a standby storage tank again.

[0094] Step Six: Once the storage tank reaches the cutting condition, switch to selecting the storage tank;

[0095] If the liquid level in a discharging tank reaches the tank-cutting condition (i.e., the liquid level reaches the lower limit of the tank level), the discharging process will be switched to the selected optimal backup tank. If the liquid level in a feeding tank reaches the tank-cutting condition (i.e., the liquid level reaches the upper limit of the tank level), the feeding process will be switched to the selected optimal backup tank.

[0096] Step 7: After switching storage tanks, determine whether the pressure information fed back by the storage tank is normal. If yes, proceed to the next judgment; otherwise, output an alarm and end the current process.

[0097] Determine if the liquid level in the storage tank has changed. If yes, proceed to the next step. If no, output an alarm and end the current process.

[0098] If the pressure information is normal and the liquid level changes, it is determined that the standby storage tank is in normal operation. The inlet and outlet valves of the previously operating storage tank are closed, the switching is completed, and the current process ends. The entire automatic switching control for the inlet and outlet of the liquid chlorine storage tank enters the next operating cycle.

[0099] This embodiment achieves precise, orderly, and intelligent fully automatic switching of the entire liquid chlorine storage system, significantly reducing the difficulty of frequent switching between multiple liquid chlorine storage tanks. The following explanation uses a comparison of liquid level changes before and after the system's commissioning as an example. Figure 2 and Figure 3 As shown in the figure, the four lines represent the liquid levels of the four storage tanks. Figure 2 To illustrate the liquid chlorine storage tank level changes before commissioning, from... Figure 2 It can be seen that before commissioning, the liquid chlorine storage tank level control operation was frequent, and the overall material control was extremely uncoordinated, with frequent high and low level alarms. This not only affected the work efficiency of the operators but also led to the risk of tank overflow or empty tanks. After the system was put into operation, from Figure 3 It can be seen that the liquid chlorine in the storage tank will be switched regularly within a certain liquid level range, which improves the automatic control rate and greatly reduces the risk of overflow or empty tank.

[0100] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0101] Although this paper uses terms such as sensor module, control module, inlet and outlet valves, server, and intelligent image design platform frequently, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A method for automatic switching control of inlet and outlet of a liquid chlorine storage tank, characterized in that: Includes the following steps: Collect parameter information from each storage tank; The probability of selecting each spare storage tank within the current selection period is calculated based on the selection parameter information, including: Based on the storage tank pressure and temperature information, and the status information of the balancing valve, waste chlorine valve, and connecting valve, an applicability reference table is established. Each selected parameter information can obtain a sub-applicability value according to the applicability reference table, and the applicability is obtained by summing the sub-applicability values. The probability of selecting a spare storage tank is calculated based on its suitability, including: The suitability of the backup storage tank is obtained based on the selected parameter information. The selection probability of the backup storage tank is obtained by the ratio of the suitability of the backup storage tank to the sum of the selection probabilities of the backup storage tank in N selection periods. The cumulative probability is calculated based on the selection probability, and the cumulative probability is used as the selection probability. The optimal backup storage tank to be switched is selected using a roulette wheel algorithm. When the storage tank meets the slotting conditions, the control switches.

2. The automatic switching control method for the inlet and outlet of a liquid chlorine storage tank according to claim 1, characterized in that: The collected parameter information includes the storage tank level, pressure, temperature, and status information of the pressure balancing valve, waste chlorine valve, connecting valve, inlet valve, and outlet valve.

3. The automatic switching control method for inlet and outlet of a liquid chlorine storage tank according to claim 1, characterized in that: The calculation of the selection probability of each spare storage tank within the current selection period based on the selection parameter information includes: The suitability f(x) of the spare storage tank is obtained based on the selected parameter information. i ); The probability of selecting a backup storage tank, p(x), is calculated based on its suitability. i ), ， Where N is the number of selection cycles, f j The probability of selecting the backup storage tank in each selection cycle; Calculate the cumulative probability q(x) based on the probability of selecting the backup storage tank. i ), ， The cumulative probability is used as the selection probability of the backup storage tank in the current selection period.

4. The automatic switching control method for the inlet and outlet of a liquid chlorine storage tank according to claim 3, characterized in that: The method of obtaining the suitability of the backup storage tank based on the selected parameter information includes: The selected parameter information includes storage tank pressure and temperature information, as well as the status information of the balancing valve, waste chlorine valve, and connecting valve. Divide the range of each selected parameter information, set a corresponding sub-applicability sub-value for each range, and construct an applicability reference table; Obtain the selection parameter information, obtain the sub-application value corresponding to the selection parameter information according to the application reference table, and sum the obtained sub-application values ​​to obtain the application.

5. The automatic switching control method for inlet and outlet of a liquid chlorine storage tank according to claim 3, characterized in that: The selection probability of all standby storage tanks is recalculated for each selection cycle.

6. The automatic switching control method for inlet and outlet of a liquid chlorine storage tank according to claim 1, characterized in that: The process of selecting the optimal backup storage tank to be switched over includes: Each spare storage tank is classified according to its feeding and discharging functions; Based on the material inlet / outlet status of the storage tank to be switched, select the optimal backup storage tank to be switched from the corresponding backup storage tank inlet / outlet classification.

7. The automatic switching control method for the inlet and outlet of a liquid chlorine storage tank according to any one of claims 1-6, characterized in that... Before selecting the optimal backup storage tank, it is also necessary to assess the condition of the backup storage tank, including: Determine if the selection probability is zero. If it is, determine that there is no alternative storage tank and output an alarm. If not, proceed to the step of selecting the optimal alternative storage tank.

8. The automatic switching control method for the inlet and outlet of a liquid chlorine storage tank according to any one of claims 1-6, characterized in that... After switching the storage tank to the optimal backup storage tank, the process also includes determining the post-switching status, including: Determine if the pressure information fed back from the storage tank is normal. If yes, proceed to the next step; otherwise, output an alarm. Determine if the liquid level in the storage tank has changed. If it has, proceed to the next step; otherwise, output an alarm. If the pressure information is normal and the liquid level changes, it is determined that the standby storage tank is in normal operation. The inlet and outlet valves of the previously operating storage tank are closed to complete the switching.

9. An automatic switching control system for the inlet and outlet of a liquid chlorine storage tank, used to implement the method described in any one of claims 1-8, characterized in that: include, The sensor module collects various parameter information within the storage tank; Inlet and outlet valves are installed at the inlet and outlet of the storage tank to switch the storage tank according to the control signal; The control module calculates the optimal backup storage tank based on parameter information and outputs a control signal to perform the switching operation when the current storage tank meets the tank switching conditions.

10. The automatic switching control system for inlet and outlet of a liquid chlorine storage tank according to claim 9, characterized in that: It also includes an intelligent graphical design platform and a server. The intelligent graphical design platform is connected to the server, and the server is connected to the control module.

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