Method and system for determining operating status of electrolytic cell

Abstract

The embodiments of the present application provide a method and system for determining the operating status of an electrolytic cell, the method comprising: obtaining operating parameters and a reference operating status of a target electrolytic cell, the reference operating status being the operating status of the target electrolytic cell as calculated by an electrolytic cell control system; determining a theoretical operating status of the target electrolytic cell based on the operating parameters; and verifying the theoretical operating status based on the reference operating status to obtain the current operating status of the target electrolytic cell. The technical solution provided by the embodiments of the present application can achieve timely, automatic, and accurate determination of the current operating status of each series of electrolytic cells, thereby reducing manual operations and improving the statistical accuracy of electrolytic cell operating status data.

Description

Technical Field

[0001] The present application relates to the field of industrial big data, and specifically, to a method and system for determining the operating status of an electrolytic cell. Background Art

[0002] The electrolytic cell is a key piece of equipment in electrolytic aluminum production, requiring uninterrupted and stable operation. Once a cell stops, restarting it is extremely expensive. Furthermore, unplanned cell stops can result in production plans being unfulfilled. Therefore, companies need to maintain daily statistics on the operating status of all cells. The current electrolytic cell control system consists of a cell control machine located at each cell site, a host interface machine located at a computer station, and workstations located in each work area. When the operating status of some electrolytic cells changes, on-site personnel are required to press buttons on the cell control machine to transmit the cell's operating status to the host interface machine for storage in the cell information table. For other electrolytic cells, the corresponding operating status must be modified on the host computer software and then stored in the cell information table. The information in the cell information table is then used by the cell control system to generate daily and shift reports.

[0003] However, since the current statistics on the operating status of the electrolytic cells rely on manual operation, if the manual touch on site is not timely, or the modification in the upper computer software is not timely, the statistical data of the electrolytic cell control system will be inaccurate, affecting the company's precise control of the current status of each electrolytic cell.

[0004] Based on this, how to provide a method for automatically and accurately determining the current operating status of each series of electrolytic cells is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] The embodiments of the present application provide a method and system for determining the operating status of an electrolytic cell. Based on the technical solution of the present application, the current operating status of each electrolytic cell can be automatically and accurately determined, thereby reducing manual operations and improving the statistical accuracy of the operating status of the electrolytic cell.

[0006] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by practice of the present application.

[0007] According to a first aspect of an embodiment of the present application, a method for determining the operating state of an electrolytic cell is provided, the method comprising: obtaining operating parameters and a reference operating state of a target electrolytic cell, the reference operating state being the operating state of the target electrolytic cell statistically calculated by an electrolytic cell control system; determining a theoretical operating state of the target electrolytic cell based on the operating parameters; and verifying the theoretical operating state based on the reference operating state to obtain the current operating state of the target electrolytic cell.

[0008] In some embodiments of the present application, based on the aforementioned scheme, obtaining the operating parameters of the target electrolytic cell includes: obtaining the operating current and operating voltage of the target electrolytic cell at preset time intervals within a set time to obtain multiple groups of operating voltages and multiple groups of operating currents; performing smoothing and filtering processing on the multiple groups of operating voltages and the multiple groups of operating currents respectively to obtain target voltages and target currents; and using the target voltages and the target currents as the operating parameters of the target electrolytic cell.

[0009] In some embodiments of the present application, based on the aforementioned scheme, the operating parameters include a first voltage, and the operating states of the electrolytic cell include stoppage, roasting, and operation. The determining of the theoretical operating state of the target electrolytic cell according to the operating parameters includes: obtaining a voltage correction coefficient of the target electrolytic cell, a reference stoppage voltage, and a reference operating voltage; correcting the reference stoppage voltage and the reference operating voltage based on the voltage correction coefficient to obtain a theoretical stoppage voltage and a theoretical operating voltage, wherein the theoretical stoppage voltage is less than the theoretical operating voltage; if the first voltage is less than or equal to the theoretical stoppage voltage, the stoppage is determined as the theoretical operating state of the target electrolytic cell; if the first voltage is greater than the theoretical operating voltage, the operation is determined as the theoretical operating state of the target electrolytic cell; if the first voltage is greater than the theoretical stoppage voltage and less than or equal to the theoretical operating voltage, the roasting is determined as the theoretical operating state of the target electrolytic cell.

[0010] In some embodiments of the present application, based on the aforementioned scheme, the operating parameters include a first current, and obtaining the voltage correction coefficient of the target electrolytic cell includes: obtaining a reference operating current of the target electrolytic cell; and using the ratio of the first current to the reference operating current as the voltage correction coefficient of the target electrolytic cell.

[0011] In some embodiments of the present application, based on the aforementioned scheme, the theoretical operating state is verified based on the reference operating state to obtain the current operating state of the target electrolytic cell, including: obtaining the change law of the electrolytic cell operating state; if the theoretical operating state is consistent with the reference operating state, the theoretical operating state is used as the current operating state of the target electrolytic cell; if the theoretical operating state is inconsistent with the reference operating state and conforms to the change law, the theoretical operating state is used as the current operating state of the target electrolytic cell; if the theoretical operating state is inconsistent with the reference operating state and does not conform to the change law, the reference operating state is used as the current operating state of the target electrolytic cell.

[0012] In some embodiments of the present application, based on the aforementioned scheme, the method further includes: obtaining and statistically analyzing the interval time between the reference operating state moment and the current moment; if the interval time is greater than a preset value, obtaining the first operating state of the target electrolytic cell, and replacing the reference operating state with the first operating state, the first operating state being the operating state determined last time for the target electrolytic cell.

[0013] In some embodiments of the present application, based on the aforementioned scheme, the operating status of the electrolytic cell includes stopping, roasting, and running. After obtaining the current operating status of the target electrolytic cell, the method further includes: obtaining the start-up time of the target electrolytic cell; if the current operating status is the roasting or the running, determining the current cell age of the target electrolytic cell based on the length of time between the start-up time and the current time; if the current operating status is stopping, obtaining the first cell age of the electrolytic cell, and using the first cell age as the current cell age of the target electrolytic cell, the first cell age being the cell age determined for the target electrolytic cell last time.

[0014] In some embodiments of the present application, based on the aforementioned scheme, after determining the current age of the target electrolytic cell, the method further includes: obtaining a set demarcation time, a first reference cell age, and a second reference cell age, the set demarcation time being before the current moment, and the first reference cell age being less than the second reference cell age; if the current operating state is the cell stop, and the start-up time is less than or equal to the set demarcation time, and the current cell age is less than the first reference cell age, then the cell stop is determined to be an unplanned cell stop; if the current operating state is the cell stop, and the start-up time is greater than the set demarcation time, and the current cell age is less than the second reference cell age, then the cell stop is determined to be an unplanned cell stop.

[0015] According to the second aspect of an embodiment of the present application, a system for determining the operating status of an electrolytic cell is provided, the system comprising: a data acquisition module for collecting operating parameters and a reference operating status of a target electrolytic cell, the reference operating status being the operating status of the target electrolytic cell counted by an electrolytic cell control system; a cell status determination module for determining a theoretical operating status of the target electrolytic cell based on the operating parameters; and a cell status verification module for verifying the theoretical operating status based on the reference operating status to obtain the current operating status of the target electrolytic cell.

[0016] In some embodiments of the present application, based on the aforementioned scheme, the operating status of the electrolytic cell includes a stop, and the system further includes: a data standardization module, connected to the data acquisition module and the cell status determination module, respectively, for standardizing the operating parameters and the reference operating status; a cell age generation module, for generating the current cell age of the target electrolytic cell based on the current operating status; a stop type determination module, for judging whether the stop is an unplanned stop based on the current cell age when the current operating status of the target electrolytic cell is the stop; and a data statistics module, for classifying and counting the data in the electrolytic cell operating status determination system.

[0017] The technical solution of the present application first obtains the operating parameters of the target electrolytic cell and the operating status of the target electrolytic cell statistically calculated by the electrolytic cell control system as a reference operating status; then determines the theoretical operating status of the target electrolytic cell based on the operating parameters; finally, verifies the theoretical operating status based on the reference operating status to obtain the current operating status of the target electrolytic cell. It can be seen that the technical solution of the present application can overcome the technical defects of inaccurate, untimely, and non-automatic statistical data caused by relying on manual operation to count the current operating status of each electrolytic cell. The technical solution of the present application can automatically and timely generate the current operating status of each electrolytic cell, thereby reducing manual operation, and by verifying the determined theoretical operating status based on the reference operating status, the accuracy of determining the current operating status of the electrolytic cell can be greatly improved, providing accurate data support for enterprises to grasp the current status of each electrolytic cell.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, explaining the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0020] Figure 1 A schematic flow chart of a method for determining the operating status of an electrolytic cell according to one embodiment of the present application is shown;

[0021] Figure 2 A detailed flow chart of obtaining operating parameters of a target electrolytic cell according to one embodiment of the present application is shown;

[0022] Figure 3The figure shows an overall flow chart of a method for determining the operating status of an electrolytic cell according to one embodiment of the present application;

[0023] Figure 4 The figure shows an architectural block diagram of a system for determining the operating status of an electrolytic cell according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0025] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps etc. can be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0026] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0027] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0028] It should be noted that the term "plurality" used in this document refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0029] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described.

[0030] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0031] The following will describe some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0032] According to a first aspect of an embodiment of the present application, a method for determining the operating status of an electrolytic cell is provided.

[0033] See also Figure 1 , specifically including steps 110 to 130.

[0034] Step 110: Acquire the operating parameters and reference operating state of the target electrolytic cell, where the reference operating state is the operating state of the target electrolytic cell calculated by the electrolytic cell control system.

[0035] In some embodiments, the reference operating state of the target electrolytic cell can be obtained from a cell shift report regularly generated by the electrolytic cell control system. The electrolytic cell control system typically generates a cell shift report for each electrolytic cell series every 6 / 8 hours, thereby recording the operating state of each electrolytic cell in the cell shift report. The statistical data in the cell shift report is generally obtained based on information recorded in an electrolytic cell information table stored in the electrolytic cell control system.

[0036] If the reference run status cannot be obtained from the slot shift report, the reference run status can be determined by following steps 1 to 4.

[0037] Step 1: Obtain the cell shift reporting voltage, cell shift reporting current, reference operating current, reference cell stop voltage, and reference operating voltage of the target electrolytic cell.

[0038] Step 2: Calculate the current ratio between the slot shift reporting current and the reference operating current.

[0039] Step 3: Based on the current ratio, the reference stop slot voltage and the reference operating voltage are corrected to obtain the shift reporting stop slot voltage and the shift reporting operating voltage. The shift reporting stop slot voltage is less than the shift reporting operating voltage.

[0040] Step 4: If the slot shift reporting voltage is less than or equal to the slot shift reporting stop voltage, the stop slot is determined as the reference operating state; if the slot shift reporting voltage is greater than the slot shift reporting operating voltage, the operation is determined as the reference operating state; if the slot shift reporting voltage is greater than the slot shift reporting stop voltage and less than or equal to the slot shift reporting operating voltage, the roasting is determined as the reference operating state.

[0041] It should be noted that the above method for obtaining the reference operating state is only an example. The reference operating state can also be obtained from the electrolyzer control system through other means, and this application does not limit this.

[0042] Among them, for the operating parameters of the target electrolytic cell, in some embodiments, the cell voltage and / or cell current of the target electrolytic cell POTi real-time data can be read as the operating parameters.

[0043] In some embodiments, the operating parameters of the target electrolytic cell can also be obtained as follows: Figure 2 The steps shown in the figure specifically include steps 111 to 112.

[0044] Step 111 : obtaining the operating current and operating voltage of the target electrolytic cell at preset time intervals within a set time, and obtaining multiple sets of operating voltages and multiple sets of operating currents.

[0045] The set time may be the time period between the last reference operating time and the current time; or a time period designed according to actual needs as the set time, which is not limited in this application.

[0046] For example, if the design is to obtain the reference operating state of the target electrolytic cell every 20 minutes, it means that the current operating state of the target electrolytic cell will be determined every 20 minutes, and the 20 minutes can be used as the set time.

[0047] The preset time interval may be set to 30 seconds, 1 minute, 2 minutes, etc. Specifically, it may be designed according to actual conditions, and this application does not limit this.

[0048] It should be noted that, in this embodiment, the preset time interval is shorter than the set time, so multiple sets of operating voltages and multiple sets of operating currents can be obtained within the set time.

[0049] In some embodiments, the cell voltage and cell current of the target electrolytic cell POTi real-time data (real-time data table of the target electrolytic cell) may be read as the operating voltage and operating current.

[0050] Continue to see Figure 2 In step 112, smoothing and filtering are performed on the multiple groups of operating voltages and the multiple groups of operating currents to obtain target voltages and target currents.

[0051] It should be noted that the smoothing filter process can be designed for the purpose of smoothing voltage and current according to actual conditions, and this application does not limit this. For example, a weighted average can be performed on multiple sets of operating voltages and multiple sets of currents, and the weighted average results can be used as the target voltage and target current, respectively; and the intermediate values ​​of the multiple sets of operating voltages and multiple sets of operating currents can be used as the target voltage and target current, respectively.

[0052] Continue to see Figure 2 , step 113, using the target voltage and the target current as operating parameters of the target electrolytic cell.

[0053] In this embodiment, by obtaining multiple sets of operating voltages and multiple sets of operating currents at set times and then performing smoothing filtering on them, the operating parameters of the target electrolytic cell finally obtained can be more accurate, making the subsequent determination of the current operating status of the target electrolytic cell more precise.

[0054] Continue to see Figure 1 , step 120, determining the theoretical operating state of the target electrolytic cell according to the operating parameters.

[0055] The specific implementation of determining the theoretical operating state of the target electrolytic cell according to the operating parameters includes the following steps 121 to 125.

[0056] In this embodiment, the operating parameters include a first voltage, which can be obtained by reading the real-time data of the target electrolytic cell POTi, preferably obtained according to the above steps 111 to 113, that is, the obtained target voltage can be used as the first voltage; the operating status of the electrolytic cell includes stopping, roasting, and running.

[0057] Step 121: Obtain the voltage correction coefficient, reference stop voltage, and reference operating voltage of the target electrolytic cell.

[0058] It should be noted that the reference stop voltage and reference operating voltage are determined by the process characteristics of the target electrolytic cell. The voltage of the target electrolytic cell when it is stopped is determined based on the process structure of the target electrolytic cell and serves as the reference stop voltage. The voltage of the target electrolytic cell when it is operating is determined based on the process structure of the target electrolytic cell and serves as the reference operating voltage. The reference stop voltage ranges from 150mV to 350mV, and the reference operating voltage ranges from 3600mV to 3800mV. For example, the reference stop voltage of a cell in a 400KA electrolytic cell series is 200mV, and the reference operating voltage is 3600mV.

[0059] Among them, the voltage correction coefficient is obtained according to the following steps 1211 to 1212. In this embodiment, the operating parameters also include a first current. The first current can be obtained by reading the real-time data of the target electrolytic cell POTi. It is preferably obtained according to the above steps 111 to 113, that is, the target current is used as the first current.

[0060] Step 1211: Obtain the reference operating current of the target electrolytic cell.

[0061] The reference operating current is determined according to the process structure of the target electrolytic cell. For example, the reference operating current of an electrolytic cell in a 400KA electrolytic cell series is 400KA.

[0062] Step 1212: Using the ratio of the first current to the reference operating current as the voltage correction coefficient of the target electrolytic cell.

[0063] For example, assuming that the first current of the target electrolytic cell is 410 kA and the reference operating current is 400 kA, 41 / 40 is used as the voltage correction coefficient.

[0064] After step 121, in step 122, the reference standstill voltage and the reference operating voltage are respectively corrected based on the voltage correction coefficient to obtain a theoretical standstill voltage and a theoretical operating voltage, wherein the theoretical standstill voltage is less than the theoretical operating voltage.

[0065] Step 123: If the first voltage is less than or equal to the theoretical cell-stopping voltage, the cell-stopping state is determined as the theoretical operating state of the target electrolytic cell.

[0066] Step 124: If the first voltage is greater than the theoretical operating voltage, the operation is determined as the theoretical operating state of the target electrolytic cell.

[0067] Step 125: If the first voltage is greater than the theoretical stop voltage and less than or equal to the theoretical operating voltage, the roasting is determined as the theoretical operating state of the target electrolytic cell.

[0068] In order to enable those skilled in the art to better understand this embodiment, some implementation methods of this embodiment will be described below with reference to formulas.

[0069] KP1=P1×I0 / CI;

[0070] KP2=P2×I0 / CI;

[0071] KP1 represents the theoretical stop voltage; P1 represents the reference stop voltage; I0 represents the first current; CI represents the reference operating current; KP2 represents the theoretical operating voltage; P2 represents the reference operating voltage.

[0072] If the first voltage ≤ KP1, the theoretical operating state of the target electrolytic cell is shutdown;

[0073] If the first voltage > KP2, the theoretical operating state of the target electrolytic cell is operation;

[0074] If KP1<first voltage≤KP2, the theoretical operating state of the target electrolytic cell is roasting.

[0075] Continue to see Figure 1 , step 130, verifying the theoretical operating state based on the reference operating state to obtain the current operating state of the target electrolytic cell, including the following two implementation methods.

[0076] The first embodiment includes steps 131 to 134 .

[0077] Step 131: Obtain the changing pattern of the electrolytic cell operating state.

[0078] For example, if the operating states of the electrolytic cell include shutdown, roasting, and operation, then the changing pattern of the operating state of the electrolytic cell is shutdown-roasting-operation-shutdown, which is the life cycle of the electrolytic cell.

[0079] It can be understood that if the current operating state of the target electrolytic cell is roasting, then after a period of time, the operating state of the target electrolytic cell will change to running.

[0080] It should be noted that the statistical time of the reference operating state is earlier than the theoretical operating state. Therefore, if the target electrolytic cell is in a normal state, the theoretical operating state of the target electrolytic cell should be consistent with the reference operating state or follow the change rule to become the next operating state of the reference operating state. For example, if the reference operating state is roasting, the theoretical operating state can only be roasting or running.

[0081] Step 132: If the theoretical operating state is consistent with the reference operating state, the theoretical operating state is used as the current operating state of the target electrolytic cell.

[0082] Step 133: If the theoretical operating state is inconsistent with the reference operating state and conforms to the variation rule, the theoretical operating state is used as the current operating state of the target electrolytic cell.

[0083] For example, if the reference operating state is running and the theoretical operating state is stopped, it means that the variation law is met.

[0084] Step 134: If the theoretical operating state is inconsistent with the reference operating state and does not conform to the change rule, the reference operating state is used as the current operating state of the target electrolytic cell.

[0085] For example, if the reference operating state is running and the theoretical operating state is baking, it means that the change rule is not met.

[0086] In order to enable those skilled in the art to better understand this embodiment, the following specific operating states will be used as examples for illustration.

[0087] Assume that the operating states of the electrolytic cell include shutdown, roasting, and operation. The changing pattern is shutdown-roasting-operation-shutdown. ST represents the theoretical operating state, and STlast represents the reference operating state.

[0088] If ST=STlast, the current operating state of the target electrolytic cell is ST or STlast.

[0089] If STlast=running and ST=stop, the current operating state of the target electrolytic cell is stop.

[0090] If STlast=baking and ST=stop, the current operating state of the target electrolytic cell is baking.

[0091] If STlast=stop and ST=calcination, the current operating state of the target electrolytic cell is calcination.

[0092] If STlast=Run and ST=Baking, then the current operating state of the target electrolyzer is Run.

[0093] If STlast=baking and ST=running, then the current operating state of the target electrolyzer is running.

[0094] If STlast=stop and ST=run, the current operating state of the target electrolytic cell is stop.

[0095] It should be noted that if the theoretical operating state is inconsistent with the reference operating state and does not conform to the law of change, it means that the human operator may not touch the button to change the operating state on the cell control machine in time, or the human operator may not modify the operating state of the target electrolytic cell in the upper computer software in time; it may also be that the target electrolytic cell has a fault, etc. Therefore, in this case, an alarm message needs to be issued to notify relevant personnel to handle it.

[0096] Continuing with step 130 , the theoretical operating state is verified based on the reference operating state to obtain a second implementation of the current operating state of the target electrolytic cell.

[0097] The second implementation includes the following steps 1311 to 1312 .

[0098] Step 1311: Obtain and count the interval time between the reference operating state moment and the current moment.

[0099] For example, if the current time is 12:00 today, and the reference operating state time of the target electrolytic cell counted by the electrolytic cell control system is 8:00 today (which can be understood as the generation time of the cell shift report), then the interval time is 4 hours.

[0100] Step 1312: If the interval time is greater than a preset value, obtain the first operating state of the target electrolytic cell and replace the reference operating state with the first operating state, where the first operating state is the operating state determined for the target electrolytic cell last time.

[0101] The preset value may be set to 1 hour, 2 hours, etc. Specifically, it may be designed according to actual conditions, and this application does not limit this.

[0102] Among them, the first operating state is the operating state of the target electrolytic cell determined by obtaining the reference operating state and operating parameters of the target electrolytic cell last time and then using the technical solution of the present application.

[0103] For example, if the interval time is determined to be 4h, the preset value is 1h, the operating state of the target electrolytic cell determined last time is roasting, and the reference operating state obtained at the current moment is parking, then because the interval time 4h is greater than the preset value 1h, roasting is used as the reference operating state, and the theoretical operating state of the target electrolytic cell is verified based on roasting to obtain the current operating state of the target electrolytic cell at the current moment.

[0104] It can be understood that by verifying the theoretical operating state of the target electrolytic cell in the manner of steps 1311 to 1312, a more accurate current operating state of the target electrolytic cell can be determined.

[0105] In some embodiments of the present application, the operating status of the electrolytic cell includes stopping, roasting, and running. After step 130, that is, after obtaining the current operating status of the target electrolytic cell, the method further includes the following steps 140 to 160.

[0106] Step 140: Obtain the start-up time of the target electrolytic cell.

[0107] In some embodiments, the start time of the target electrolytic cell can be obtained from the electrolytic cell information table stored in the electrolytic cell control system. For example, if the start date of the target electrolytic cell recorded in the electrolytic cell information table is 2013-08-06, then 2013-08-06 is the start time.

[0108] Step 150: If the current operating state is the roasting or the operation, determine the current cell age of the target electrolytic cell according to the length of time between the start time and the current time.

[0109] In some embodiments, the time length between the startup time and the current time can be used as the current cell age of the target electrolytic cell. For example, if the startup time is 00:00 on August 6, 2013, and the current time is 09:00:00 on February 20, 2023, then the time length between the startup time and the current time can be determined to be 3485 days + 9 hours. 3485 days + 9 hours can be used as the current cell age of the target electrolytic cell.

[0110] In some embodiments, the number of days between the start-up time and the current time can be used as the current age of the target electrolytic cell. For example, in the above example, 3485 days is used as the current age of the target electrolytic cell.

[0111] Step 160: If the current operating state is the stop state, obtain the first cell age of the electrolytic cell and use the first cell age as the current cell age of the target electrolytic cell. The first cell age is the cell age determined last time for the target electrolytic cell.

[0112] Among them, the first cell age is the cell age of the target electrolytic cell obtained by obtaining the operating parameters and reference operating status of the target electrolytic cell last time, and then determining it through the technical solution of this application.

[0113] It is understood that when the electrolytic cell is in a stopped state, no cell age is accumulated because it is not in operation. Therefore, if the current operating state of the target electrolytic cell is stopped, the last determined cell age is used as its current cell age.

[0114] In this embodiment, by determining the current cell age of the target electrolytic cell according to its current operating status, a data source can be provided for the enterprise to monitor the current status of each electrolytic cell in real time.

[0115] In some embodiments of the present application, after determining the current cell age of the target electrolytic cell, the method further includes the following steps 170 to 190 .

[0116] Step 170: Obtain a set demarcation time, a first reference tank age, and a second reference tank age, wherein the set demarcation time is before the current moment, and the first reference tank age is less than the second reference tank age.

[0117] It should be noted that the set demarcation time is determined by management based on the development characteristics of electrolytic cell technology in order to better determine the type of electrolytic cell shutdown (including planned and unplanned shutdowns). For example, if January 1, 2017 is confirmed to be the date of significant improvement in electrolytic cell technology, and electrolytic cells commissioned before January 1, 2017 are technologically backward, while electrolytic cells commissioned after January 1, 2017 are technologically advanced, then January 1, 2017 is determined as the set demarcation time.

[0118] It should also be noted that the first reference cell age is mainly set for the benchmark cell age of the electrolytic cell put into use before the set demarcation time, and the second reference cell age is mainly set for the benchmark cell age of the electrolytic cell put into use after the set demarcation time.

[0119] Step 180: If the current operating state is the stoppage, the start time is less than or equal to the set demarcation time, and the current tank age is less than the first reference tank age, the stoppage is determined to be an unplanned stoppage.

[0120] Step 190: If the current operating state is the stoppage, the start time is greater than the set boundary time, and the current tank age is less than the second reference tank age, the stoppage is determined to be an unplanned stoppage.

[0121] In order to enable those skilled in the art to better understand this example, it will be described in detail below with reference to relevant formulas.

[0122] When BD≤Y and PotAge<PA1, the stop type is determined to be "unplanned stop";

[0123] When BD>Y and PotAge<PA2, the stop type is determined to be "unplanned stop";

[0124] When the target electrolytic cell is stopped, the corresponding other situations determine the stop type = "planned stop".

[0125] Among them, BD represents the set demarcation time; PotAge represents the current age of the target electrolytic cell; PA1 represents the first reference cell age; PA2 represents the second reference cell age.

[0126] It can be understood that in order to finely distinguish the types of electrolytic cells stopped after being put into use in different time periods, the set demarcation time and its corresponding two reference cell ages can be expanded to N set demarcation times and their corresponding N+1 reference cell ages, which should also be within the scope of this application and will not be described in detail here.

[0127] It will be appreciated that in this embodiment, since the electrolytic aluminum production process generally requires uninterrupted, long-term, stable operation of the electrolytic cell, an unplanned shutdown of the electrolytic cell will seriously impact the completion of the production plan. Therefore, if the current operating status of the target electrolytic cell is determined to be shutdown, the shutdown type needs to be determined to confirm whether it is planned or unplanned. If it is unplanned, relevant personnel can be promptly notified to diagnose the cause of the unplanned shutdown.

[0128] In order to make those skilled in the art better understand some embodiments of the present application, it can be combined with Figure 3 The overall flow chart shown can be understood, wherein V1 represents the first voltage; KP1 represents the theoretical stop voltage; P1 represents the reference stop voltage; I0 represents the first current; CI represents the reference operating current; KP2 represents the theoretical operating voltage; P2 represents the reference operating voltage; ST represents the theoretical operating state, STlast represents the reference operating state; MT represents the current operating state.

[0129] According to a second aspect of the embodiment of the present application, a system for determining the operating status of an electrolytic cell is provided. Figure 4 , shows an architectural block diagram of a system for determining an electrolytic cell operating status in some embodiments.

[0130] In some embodiments, the system for determining the electrolytic cell operating status includes a data acquisition module 100, a cell status determination module 300, a cell status verification module, a data standardization module 200, a cell age generation module, a cell stop type determination module 600, and a data statistics module 700.

[0131] The data acquisition module 100 is used to collect the operating parameters and reference operating status of the target electrolytic cell. The reference operating status is the operating status of the target electrolytic cell calculated by the electrolytic cell control system.

[0132] In some embodiments, the data acquisition module 100 connects to various branches and subsidiaries via an enterprise wide area network, and uses the JDBC / ODBC protocol to access the electrolytic cell control system, and obtains data according to the preset correspondence between data fields and data items, and saves the obtained data in a related storage structure.

[0133] In some embodiments, the data that the data acquisition module 100 can collect includes but is not limited to the operating parameters of the target electrolytic cell, relevant data counted in the cell shift report (such as reference operating status, cell shift report voltage, cell shift report current, etc.), the start-up time of the target electrolytic cell recorded in the electrolytic cell information table, the operating status of the target electrolytic cell recorded in the electrolytic cell information table, etc.

[0134] Continue to see Figure 4 , wherein the data standardization module 200 is connected to the data acquisition module 100 and the slot state determination module 300, and is used to standardize the operating parameters and the reference operating state.

[0135] Specifically, the data standardization module 200 standardizes the relevant data collected by the data acquisition module 100, and according to the preset configuration information, unifies the range units of process data such as voltage and current in different slot control systems of each enterprise, unifies the reference operation status codes, and unifies the data formats such as slot numbers and start times, so that the slot numbers are unique.

[0136] For example, if the operating parameters collected by the data acquisition module 100 include a first current and a first voltage, the unit of the first current is A, and the unit of the first voltage is V, then the unit of the first current can be converted into KA and the unit of the first voltage can be converted into mV through the data standardization module 200.

[0137] For example, if the reference operation status code collected by the data collection module 100 is a character, it can be uniformly converted into numbers 0, 1, and 2 by the data standardization module 200, where 0 represents operation, 1 represents stop, and 2 represents roasting.

[0138] For example, the two-digit company number can be added before the cell number of the target electrolytic cell to make the cell number of the target electrolytic cell unique. For example, if the target electrolytic cell is cell 2101, the company number 21 is added to change the cell number of the target electrolytic cell to 212101. This allows the data statistics module 700 to generate a summary report by statistically analyzing the associated data of each electrolytic cell, and to distinguish each electrolytic cell with a corresponding identifier.

[0139] Exemplarily, the character status of the acquired startup time of the target electrolytic cell may be converted into a date format.

[0140] Continue to see Figure 4, wherein the tank state determination module 300 is used to determine the theoretical operating state of the target electrolytic tank according to the operating parameters.

[0141] Specifically, the specific implementation method of determining the theoretical operating state of the target electrolytic cell according to the operating parameters in the cell state determination module 300 can be performed with reference to the specific implementation method in step 120 in the first aspect of the above-mentioned embodiment of the present application, and this application will not repeat it here.

[0142] Continue to see Figure 4 , wherein the tank state verification module is used to verify the theoretical operating state based on the reference operating state to obtain the current operating state of the target electrolytic cell.

[0143] Specifically, the tank state verification module verifies the theoretical operating state based on the reference operating state to obtain the specific implementation method of the current operating state of the target electrolytic cell. It can be executed with reference to the specific implementation method in step 130 of the first aspect of the above-mentioned embodiment of the present application, and this application will not repeat it here.

[0144] Continue to see Figure 4 In some embodiments, the system for determining the operating status of the electrolytic cell further includes a cell age generation module for generating the current cell age of the target electrolytic cell based on the current operating status.

[0145] It can be understood that the tank age generation module is connected to the data acquisition module 100 and the tank status verification module.

[0146] Specifically, the specific implementation method of generating the current cell age of the target electrolytic cell based on the current operating status in the cell age generation module can be performed with reference to the specific implementation methods in steps 140 to 160 in the first aspect of the above-mentioned embodiment of the present application, and this application will not repeat them here.

[0147] Continue to see Figure 4 In some embodiments, the system for determining the operating status of the electrolytic cell further includes a stop type determination module 600, which is used to determine whether the stop is an unplanned stop based on the current cell age when the current operating status of the target electrolytic cell is the stop.

[0148] It can be understood that the tank stop type determination module 600 is connected to the data acquisition module 100, the tank age generation module, and the tank status verification module.

[0149] Specifically, in the stop type determination module 600, when the current operating state of the target electrolytic cell is the stop, the specific implementation method of judging whether the stop is an unplanned stop based on the current cell age can be performed with reference to the specific implementation methods in steps 170 to 190 in the first aspect of the above-mentioned embodiment of the present application, and will not be repeated here in this application.

[0150] Continue to see Figure 4 In some embodiments, the system for determining the operating status of the electrolytic cell further includes a data statistics module 700 for classifying and counting the data in the system for determining the operating status of the electrolytic cell.

[0151] It can be understood that the data statistics module 700 is connected to each module so as to classify and count the data of each electrolytic cell based on the associated data in each module.

[0152] In some embodiments, the data statistics module 700 can count data including but not limited to the number of stopped cells in each electrolytic cell, the number of operations in each electrolytic cell, the number of roastings in each electrolytic cell, the number of unplanned stopped cells in each electrolytic cell; the number of planned stopped cells in each electrolytic cell; statistics on the current cell age status in each electrolytic cell, etc.

[0153] In order to enable those skilled in the art to better understand the technical solution of the present application, the following example 1 will be used as an example to illustrate the technical solution of the present application.

[0154] At 09:00:00 on February 20, 2023, a subsidiary of Company A wishes to determine the current operating status and related statistical data of cell 2101# in the 300KA electrolytic cell series, which consists of 300 electrolytic cells.

[0155] First, the data acquisition module 100 obtains the first voltage of slot 2101# = 3.928V, the first current = 305kA, the statistical time ShiftDate of the slot shift report = February 20, 2023 08:00:00 (that is, the statistical reference operating state time), the start time BD = 2019-03-26; the reference operating state STlast = running, the slot shift report voltage V0 = 3.901V, and all the collected data are transmitted to the data center deployed at the group company headquarters via the wide area network.

[0156] The data standardization module 200 reads the conversion rules configured by Company A. These conversion rules correspond to voltage data in mV and current data in kA. Because the original voltage unit for Company A's 300KA slot control system is V, it must be multiplied by 1000 during standardization, and the current data is not processed. The reference operation status code is a character code, which is uniformly converted into the numbers 0, 1, and 2, where 0 represents operation, 1 represents shutdown, and 2 represents roasting. The two-digit company code, 21, is prepended to the slot number. Therefore, slot number 2101 of Company A becomes 212101. The original character-type startup time is converted into a date type.

[0157] After normalization:

[0158] The first voltage = 3928mV, the first current = 305kA, the reference operating state STlast = 0, the slot shift report voltage V0 = 3901mV, the current collection time = 2023-02-20 09:00:00, the statistical time of the slot shift report ShiftDate = 2023-02-20 08:00:00, and the start time BD = 2019-03-26.

[0159] Furthermore, the slot state determination module 300 determines the slot state of slot 212101#, reads the reference stop voltage P1=320, the reference operating voltage P2=3700, and the 300KA series reference operating current CI=300, and calculates them respectively using the formula:

[0160] Theoretical stop voltage KP1=P1×I0 / CI

[0161] Theoretical operating voltage KP2=P2×I0 / CI

[0162] The theoretical stop voltage KP1=325.3 and the theoretical operating voltage KP2=3761.7 are obtained. Since the first voltage (3928)>KP1(3761.7), the theoretical operating state ST of electrolytic cell 212101# is determined to be operating, and the theoretical operating state ST=0.

[0163] Furthermore, the cell status verification module verifies the theoretical operating state using the electrolytic cell's cycle from shutdown, roasting, operation, and shutdown, outputting alarms for any anomalies. The default value is 120 minutes. If the interval between the statistical reference operating state moment and the current moment is 60 minutes, which is less than the default value of 120 minutes, the reference operating state STlast remains unchanged at 0. Since ST = STlast = 0, the current operating state of cell 212101 is "operating."

[0164] Furthermore, the current slot age of slot 212101# is generated according to the slot age generation module:

[0165] Current pot age PotAge = day('2023-02-20' - '2019-03-26') = 1427 days, where day() is a function that calculates the interval between dates.

[0166] Furthermore, according to the stop type determination module 600, the start time BD = 2013-08-06 is read, the boundary time Y = 2017-01-01 is set, the first reference tank age PA1 = 2500, the second reference tank age PA2 = 2800, the current tank age PotAge = 1427; the current operating state = 0, because the current operating state is running, not stop, and the stop type judgment is not performed.

[0167] Furthermore, the next electrolytic cell is processed until the statistics of the 300 electrolytic cells included in the 300KA electrolytic cell series are completed. Based on the statistical results, the data statistics module 700 can summarize and display various data according to the electrolytic series, branches, subsidiaries, etc.

[0168] In the technical solutions provided in some embodiments of the present application, the operating parameters of the target electrolytic cell and the operating status of the target electrolytic cell statistically calculated by the electrolytic cell control system are first obtained as a reference operating status; then the theoretical operating status of the target electrolytic cell is determined based on the operating parameters; finally, the theoretical operating status is verified based on the reference operating status to obtain the current operating status of the target electrolytic cell. It can be seen that the technical solution of the present application can overcome the technical defects of inaccurate, untimely, and non-automatic statistical data caused by relying on manual operation to calculate the current operating status of each electrolytic cell. The technical solution of the present application can automatically and timely generate the current operating status of each electrolytic cell, thereby reducing manual operation, and by verifying the determined theoretical operating status based on the reference operating status, the accuracy of determining the current operating status of the electrolytic cell can be greatly improved, providing accurate data support for enterprises to grasp the current status of each electrolytic cell.

[0169] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in this application. It should be understood that this application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of this application is limited only by the appended claims.

Claims

1. A method for determining the operating state of an electrolytic cell, characterized in that: The method comprises: Acquiring operating parameters and a reference operating state of a target electrolytic cell, where the reference operating state is the operating state of the target electrolytic cell as calculated by an electrolytic cell control system; determining a theoretical operating state of the target electrolytic cell according to the operating parameters; The operating parameters include a first voltage, and the operating states of the electrolytic cell include shutdown, roasting, and operation. Determining the theoretical operating state of the target electrolytic cell according to the operating parameters includes: Obtaining a voltage correction coefficient, a reference stop voltage, and a reference operating voltage of the target electrolytic cell; Correcting the reference standstill voltage and the reference operating voltage based on the voltage correction coefficient to obtain a theoretical standstill voltage and a theoretical operating voltage, wherein the theoretical standstill voltage is less than the theoretical operating voltage; If the first voltage is less than or equal to the theoretical stop voltage, determining the stop voltage as the theoretical operating state of the target electrolytic cell; If the first voltage is greater than the theoretical operating voltage, determining the operation as the theoretical operating state of the target electrolytic cell; If the first voltage is greater than the theoretical stop voltage and less than or equal to the theoretical operating voltage, determining the roasting as the theoretical operating state of the target electrolytic cell; Verifying the theoretical operating state based on the reference operating state to obtain the current operating state of the target electrolytic cell; The verifying the theoretical operating state based on the reference operating state to obtain the current operating state of the target electrolytic cell includes: Obtain the changing rules of the electrolytic cell's operating status; If the theoretical operating state is consistent with the reference operating state, taking the theoretical operating state as the current operating state of the target electrolytic cell; If the theoretical operating state is inconsistent with the reference operating state and conforms to the variation rule, the theoretical operating state is used as the current operating state of the target electrolytic cell; If the theoretical operating state is inconsistent with the reference operating state and does not conform to the change rule, the reference operating state is used as the current operating state of the target electrolytic cell.

2. The method according to claim 1, characterized in that The obtaining of the operating parameters of the target electrolytic cell includes: Within a set time, obtaining the operating current and operating voltage of the target electrolytic cell at preset time intervals to obtain multiple sets of operating voltages and multiple sets of operating currents; Performing smoothing and filtering processing on the multiple groups of operating voltages and the multiple groups of operating currents respectively to obtain target voltages and target currents; The target voltage and the target current are used as operating parameters of the target electrolytic cell.

3. The method according to claim 1, characterized in that The operating parameter includes a first current, and obtaining a voltage correction coefficient of the target electrolytic cell includes: Obtaining a reference operating current of the target electrolytic cell; The ratio of the first current to the reference operating current is used as a voltage correction coefficient of the target electrolytic cell.

4. The method according to claim 1, wherein The method further comprises: Obtaining and counting the interval time between the reference operating state moment and the current moment; If the interval time is greater than a preset value, a first operating state of the target electrolytic cell is acquired, and the reference operating state is replaced by the first operating state, where the first operating state is the operating state determined last time for the target electrolytic cell.

5. The method according to claim 1, wherein The operating status of the electrolytic cell includes stopping, roasting, and running. After obtaining the current operating status of the target electrolytic cell, the method further includes: Obtaining a start-up time of the target electrolytic cell; If the current operating state is the roasting or the operation, determining the current cell age of the target electrolytic cell according to the length of time between the start time and the current time; If the current operating state is the stop state, a first cell age of the electrolytic cell is obtained, and the first cell age is used as the current cell age of the target electrolytic cell, where the first cell age is the cell age determined last time for the target electrolytic cell.

6. The method according to claim 5, characterized in that After determining the current cell age of the target electrolytic cell, the method further includes: Obtaining a set demarcation time, a first reference tank age, and a second reference tank age, wherein the set demarcation time is before the current time, and the first reference tank age is less than the second reference tank age; If the current operating state is the tank stop, the start time is less than or equal to the set demarcation time, and the current tank age is less than the first reference tank age, the tank stop is determined to be an unplanned tank stop; If the current operating state is the stop, the start time is greater than the set boundary time, and the current tank age is less than the second reference tank age, the stop is determined to be an unplanned stop.

7. A system for determining the operating status of an electrolytic cell, characterized in that: The system comprises: A data acquisition module, configured to acquire operating parameters and a reference operating state of a target electrolytic cell, wherein the reference operating state is the operating state of the target electrolytic cell as determined by the electrolytic cell control system; a cell state determination module, configured to determine a theoretical operating state of the target electrolytic cell according to the operating parameters; The operating parameters include a first voltage, and the operating states of the electrolytic cell include stop, roast, and run. The cell state determination module is specifically used to obtain a voltage correction coefficient, a reference stop voltage, and a reference run voltage of the target electrolytic cell; based on the voltage correction coefficient, the reference stop voltage and the reference run voltage are respectively corrected to obtain a theoretical stop voltage and a theoretical run voltage, wherein the theoretical stop voltage is less than the theoretical run voltage; if the first voltage is less than or equal to the theoretical stop voltage, the stop is determined as the theoretical run state of the target electrolytic cell; if the first voltage is greater than the theoretical run voltage, the run is determined as the theoretical run state of the target electrolytic cell; if the first voltage is greater than the theoretical stop voltage and less than or equal to the theoretical run voltage, the roast is determined as the theoretical run state of the target electrolytic cell; a cell state verification module, configured to verify the theoretical operating state based on the reference operating state to obtain the current operating state of the target electrolytic cell; The tank state verification module is specifically used to obtain the changing law of the operating state of the electrolytic tank; if the theoretical operating state is consistent with the reference operating state, the theoretical operating state is used as the current operating state of the target electrolytic tank; if the theoretical operating state is inconsistent with the reference operating state and conforms to the changing law, the theoretical operating state is used as the current operating state of the target electrolytic tank; if the theoretical operating state is inconsistent with the reference operating state and does not conform to the changing law, the reference operating state is used as the current operating state of the target electrolytic tank.

8. The system according to claim 7, characterized in that The system further comprises: a data standardization module, connected to the data acquisition module and the tank state determination module, for performing standardization processing on the operating parameters and the reference operating state; A cell age generation module, configured to generate a current cell age of the target electrolytic cell based on the current operating state; a stop type determination module, configured to, when the current operating state of the target electrolytic cell is the stop state, determine whether the stop state is unplanned based on the current cell age; The data statistics module is used to classify and count the data in the system for determining the operating status of the electrolytic cell.

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