A coal mill abnormal condition self-healing processing method and system

Abstract

The application relates to a coal mill abnormal condition self-healing processing method and system, wherein the method comprises the following steps: acquiring coal mill data in a thermal power generating unit; detecting whether a coal feeding amount fault occurs in the thermal power generating unit by an artificial intelligence calculation model based on the coal mill data; if the coal feeding amount fault occurs, closing the coal feeder involved in the coal feeding amount fault, stopping the coal milling step sequence of the corresponding coal mill and ensuring the safety of the outlet temperature of the coal mill; starting a standby coal mill and starting the coal feeder under the condition of ensuring the safety of the standby coal mill. Through the application, the artificial intelligence calculation model is used to detect the coal feeding amount fault of the thermal power generating unit, the fault coal mill is closed in time in the case of the fault, the coal mill is quickly restored to normal operation, the downtime caused by the fault is reduced, the overall operation efficiency and reliability of the equipment are improved, and the problem of how to reduce the influence of the coal mill fault on the production progress of the thermal power generating unit is solved.

Description

Technical Field

[0001] This application relates to the field of industrial production technology, and in particular to a method and system for self-healing abnormal operating conditions of a coal mill. Background Technology

[0002] In modern industrial production, the stable operation of equipment is crucial to ensuring production efficiency and product quality. However, as equipment is used for longer periods, various malfunctions and abnormal operating conditions are unavoidable.

[0003] Traditional equipment maintenance methods rely primarily on periodic inspections and reactive maintenance, which often fail to detect potential faults in a timely manner. This can easily lead to sudden equipment failures, disrupting production schedules and potentially causing safety accidents. Therefore, how to effectively monitor equipment condition and provide early warning of faults has become a key focus in the industry.

[0004] Currently, no effective solution has been proposed for reducing the impact of coal mill failures on the production schedule of thermal power units. Summary of the Invention

[0005] This application provides a method and system for handling abnormal operating conditions of a coal mill, so as to at least solve the problem in the related art of how to reduce the impact of coal mill failures on the production progress of thermal power units.

[0006] In a first aspect, embodiments of this application provide a self-healing method for handling abnormal operating conditions of a coal mill, the method comprising:

[0007] Obtain data from the coal mills in thermal power generating units;

[0008] Based on the coal mill data, an artificial intelligence calculation model is used to detect whether the coal feed rate of the thermal power generating unit has failed.

[0009] If the coal feed rate failure occurs, the coal feeder involved in the coal feed rate failure shall be shut down, the grinding sequence of the corresponding coal mill shall be stopped, and the outlet temperature of the coal mill shall be kept safe.

[0010] Start the standby coal mill, and then start the coal feeder while ensuring the safety of the standby coal mill.

[0011] In some embodiments, detecting whether the coal feed rate of the thermal power generating unit has failed, based on the coal mill data and using an artificial intelligence calculation model, includes:

[0012] Based on the coal mill data, the coal-fired power generating unit is detected for coal shortage faults using an artificial intelligence calculation model, and the coal blockage faults are also detected using an artificial intelligence calculation model.

[0013] If the thermal power generating unit experiences the coal shortage fault and / or the coal blockage fault, then it is determined that the thermal power generating unit has experienced a coal feed rate fault.

[0014] In some embodiments, based on the coal mill data, detecting coal shortage faults in the thermal power generating unit using an artificial intelligence calculation model includes:

[0015] Based on the coal mill data, the coal feed rate of the thermal power generating unit is detected by an artificial intelligence calculation model. If the detected decrease in the coal feed rate is greater than a preset threshold, the thermal power generating unit will experience a coal shortage fault.

[0016] In some embodiments, based on the coal mill data, detecting coal blockage faults in the thermal power generating unit using an artificial intelligence calculation model includes:

[0017] Based on the coal mill data, the thermal power generating unit is tested for coal blockage faults using an artificial intelligence calculation model. If any abnormal fluctuation is detected in at least one of the following: coal mill inlet and outlet air volume, coal mill current, coal mill outlet temperature, and coal mill ventilation resistance, then the thermal power generating unit has experienced a coal blockage fault.

[0018] In some embodiments, the coal feeder involved in shutting down the coal feed rate failure includes:

[0019] Turn off the ACC control of the coal feeder involved in the coal feeder failure, and gradually reduce the coal feeder's feed rate until the coal feeder is shut down.

[0020] In some embodiments, stopping the grinding step of the corresponding coal mill includes:

[0021] The separator speed of the corresponding coal mill is gradually reduced until the separator is shut off. When the current of the coal mill is less than the preset current threshold, the grinding roller of the coal mill is raised, the hot air damper opening is gradually reduced to the first opening, and the cold air damper opening is gradually increased to the second opening.

[0022] In some embodiments, ensuring the safety of the coal mill outlet temperature includes:

[0023] If the outlet temperature of the coal mill is greater than the preset temperature threshold, the fire extinguishing steam shut-off valve of the coal mill is opened and held for a preset time, and then the fire extinguishing steam shut-off valve is closed.

[0024] If the outlet temperature of the coal mill is decreasing, adjust the hot air pneumatic isolation door and the cold air pneumatic isolation door to shut down the coal mill, lower the grinding rollers of the coal mill, and open the hydraulic reversing valve.

[0025] In some embodiments, starting up a standby coal mill includes:

[0026] Start the low-speed oil pump, loading oil pump and separator of the standby coal mill, open the sealing damper, hydraulic station variable loading solenoid valve and stone coal hopper pneumatic gate valve of the standby coal mill, and close the stone coal hopper sealing chamber.

[0027] Adjust the opening of the hot air damper and the cold air damper of the standby coal mill to enter the ignition mode.

[0028] In some embodiments, starting the coal feeder while ensuring the safety of the standby coal mill includes:

[0029] Close the hydraulic directional valve of the standby coal mill and raise the grinding rollers of the standby coal mill to start the standby coal mill and the coal feeder.

[0030] Secondly, embodiments of this application provide a self-healing system for abnormal operating conditions of a coal mill. The system is used to execute the method described in any of the first aspects above. The system includes a data acquisition module, a fault detection module, and a self-healing module.

[0031] The data acquisition module is used to acquire data from the coal mill in the thermal power generating unit;

[0032] The fault detection module is used to detect whether the coal feed rate of the thermal power generating unit has failed based on the coal mill data and an artificial intelligence calculation model.

[0033] The self-healing module is used to shut down the coal feeder involved in the coal feeder failure, stop the grinding sequence of the corresponding coal mill, and ensure the safety of the coal mill outlet temperature if the coal feeder failure occurs.

[0034] The self-healing module is used to start the backup coal mill and, while ensuring the safety of the backup coal mill, to start the coal feeder.

[0035] Compared to related technologies, the present application provides a self-healing method and system for abnormal operating conditions of coal mills. This method acquires coal mill data from a thermal power generating unit; based on the coal mill data, it uses an artificial intelligence calculation model to detect whether a coal feed rate fault has occurred in the thermal power generating unit; if a coal feed rate fault occurs, it shuts down the coal feeder involved in the fault, stops the corresponding coal mill's grinding sequence, and ensures the safety of the coal mill's outlet temperature; it starts a standby coal mill, and, while ensuring the safety of the standby coal mill, starts the coal feeder. This achieves the use of an artificial intelligence calculation model to detect coal feed rate faults in thermal power generating units, promptly shuts down the faulty coal mill in the event of a fault, and quickly restores the coal mill to normal operation. This improves the automated response capability of the coal mill under abnormal conditions, reduces downtime caused by faults, improves the overall operating efficiency and reliability of the equipment, and solves the problem of how to reduce the impact of coal mill faults on the production progress of thermal power generating units. Attached Figure Description

[0036] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0037] Figure 1 This is a flowchart of the steps of the self-healing method for abnormal operating conditions of a coal mill according to an embodiment of this application;

[0038] Figure 2 This is a structural block diagram of a coal mill abnormal operating condition self-healing system according to an embodiment of this application;

[0039] Figure 3 This is a schematic diagram of the internal structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0041] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0042] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0043] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0044] This application provides a self-healing method for handling abnormal operating conditions of a coal mill. Figure 1 This is a flowchart illustrating the steps of the self-healing method for abnormal operating conditions of a coal mill according to an embodiment of this application, as follows: Figure 1As shown, the method includes the following steps:

[0045] Step S102: Obtain coal mill data from the thermal power generating unit;

[0046] Step S104: Based on the coal mill data, detect whether the coal feeding failure of the thermal power generating unit has occurred through an artificial intelligence calculation model;

[0047] Step S104 specifically includes the following steps:

[0048] Step S1041: Based on the coal mill data, the coal-fired power generating unit is detected for coal shortage faults and coal blockage faults through an artificial intelligence calculation model.

[0049] Step S1042: If the thermal power generating unit has a coal shortage fault and / or a coal blockage fault, then it is determined that the thermal power generating unit has a coal feed rate fault.

[0050] Specifically, step S1042 involves: ① Detecting the coal feed rate of the thermal power generating unit using an artificial intelligence calculation model based on coal mill data. If the detected decrease in coal feed rate exceeds a preset threshold, a coal supply interruption fault occurs in the thermal power generating unit. ② Detecting coal blockage faults in the thermal power generating unit using an artificial intelligence calculation model based on coal mill data. If abnormal fluctuations are detected in at least one of the following: coal mill inlet / outlet air volume, coal mill current, coal mill outlet temperature, and coal mill ventilation resistance, a coal blockage fault occurs in the thermal power generating unit.

[0051] It should be noted that the function of the coal feeder (also known as a coal feeder or coal feeder) in a thermal power generating unit is to uniformly transport coal from the coal storage area to the coal mill. The purpose of the coal feeder is to ensure that coal is supplied to the next process, namely the coal grinding process, at a stable rate and quantity. Coal feeders can take various forms (such as belt feeders, vibrating feeders, etc.). The function of the coal mill is to grind the coal into powder for easier combustion. Coal mills also come in various types (such as ball mills, medium-speed mills, high-speed mills, etc.). The ground coal powder mixes more easily with air, thereby improving combustion efficiency and reducing pollutant emissions.

[0052] Workflow: In actual operation, coal first enters the coal mill via a coal feeder, where it is ground into fine particles. These fine coal particles are then carried away by hot air and transported through pipelines to the burner for combustion. This entire process is monitored and adjusted by a control system to ensure the stability of the coal supply and the quality of the pulverized coal.

[0053] Step S106: If a coal feed rate failure occurs, shut down the coal feeder involved in the coal feed rate failure, stop the coal milling sequence of the corresponding coal mill, and ensure the safety of the coal mill outlet temperature.

[0054] Step S106 specifically includes the following steps:

[0055] Step S1061: Close the ACC control of the coal feeder involved in the coal feeder fault, and gradually reduce the coal feeder's coal feed rate until the coal feeder is shut down.

[0056] Preferably, in step S1061, the ACC control of the coal feeder involved in the coal feeder failure is turned off, and the load command of the thermal power unit is automatically reduced to 80% of the current load command to prevent other coal mills from operating beyond their capacity; the coal feeder's coal feed rate is reduced to below 20t / h at a rate of 10t / h per minute based on the current coal feed rate, and the coal feeder inlet gate is closed to stop the coal feeder.

[0057] It should be noted that ACC control refers to Automatic Combustion Control. In thermal power plants, the automatic combustion control system is part of the process used to optimize the boiler combustion process, ensuring optimal fuel utilization and reducing pollutant emissions. The coal feeder and coal mill, as key equipment for supplying pulverized coal, directly affect the combustion effect through their operating status.

[0058] Step S1062: Gradually reduce the separator speed of the corresponding coal mill until the separator is closed. When the current of the coal mill is less than the preset current threshold, raise the grinding roller of the coal mill, gradually reduce the opening of the hot air damper to the first opening, and gradually increase the opening of the cold air damper to the second opening.

[0059] In step S1062, preferably, the separator speed of the corresponding coal mill is gradually reduced to 100 r / min, and the separator is stopped after the speed decreases; when the current of the coal mill is less than 40A, the grinding roller of the coal mill is raised; the opening of the hot air damper is gradually reduced to 4% at a rate of 10% / min, and the opening of the cold air damper is gradually increased to 100% at a rate of 25% / min.

[0060] Step S1063: If the outlet temperature of the coal mill is greater than the preset temperature threshold, the fire extinguishing steam shut-off valve of the coal mill is opened and closed after a preset time; if the outlet temperature of the coal mill is decreasing, the hot air pneumatic isolation door and the cold air pneumatic isolation door are adjusted to shut down the coal mill, the grinding rollers of the coal mill are lowered and the hydraulic reversing valve is opened.

[0061] In step S1063, preferably, it is determined whether the outlet temperature of the coal mill is greater than 90°C. If the outlet temperature of the coal mill is greater than 90°C, the fire extinguishing steam shut-off valve of the coal mill is opened and delayed for 1 minute, and then the fire extinguishing steam shut-off valve of the coal mill is closed. If the outlet temperature of the coal mill is decreasing, the hot air pneumatic isolation door is closed, the cold air pneumatic isolation door is set to 40% to shut down the coal mill and delay for 30 seconds, the grinding roller of the coal mill is lowered and delayed for 60 seconds, and the hydraulic reversing valve is opened.

[0062] Step S108: Start the standby coal mill. If the safety of the standby coal mill is ensured, start the coal feeder.

[0063] Step S108 specifically includes the following steps:

[0064] Step S1081: Start the low-speed oil pump, loading oil pump and separator of the standby coal mill; open the sealing damper, hydraulic station variable loading solenoid valve and stone coal hopper pneumatic gate valve of the standby coal mill; close the stone coal hopper sealing chamber; adjust the opening of the hot air damper and cold air damper of the standby coal mill to enter the ignition mode.

[0065] Preferably, in step S1081, the low-speed oil pump of the standby coal mill is started, the loading oil pump of the standby coal mill is started, the sealing damper of the standby coal mill is opened, the separator of the standby coal mill is started and the frequency converter is set to 250r / min, and the loading solenoid valve of the hydraulic station of the standby coal mill is opened; the first and second stage pneumatic gate valves of the stone and coal hopper of the standby coal mill are opened, the sealing chamber of the stone and coal hopper is closed, and the outlet door of the standby coal mill is opened sequentially at 2s intervals; the cold and hot air pneumatic isolation doors of the standby coal mill are opened, the cold air regulating damper is set to 40% and the hot air regulating damper is set to 2%, the secondary air damper of the standby coal mill is set to the ignition position, the plasma ignition mode is entered, the inlet air volume is greater than 50t / h, and the arc is started at 5s intervals.

[0066] Step S1082: Close the hydraulic reversing valve of the standby coal mill and raise the grinding rollers of the standby coal mill to start the standby coal mill and the coal feeder.

[0067] Preferably, in step S1082, the hydraulic reversing valve of the standby coal mill is closed, the grinding rollers of the standby coal mill are raised, and the standby coal mill is started when the start-up conditions are met. The corresponding coal feeder of the standby coal mill is started and set to 15t / h. The inlet and outlet gates of the coal feeder are opened and the grinding rollers are lowered after a delay of 120s. The relevant secondary air dampers of the standby coal mill are put into automatic mode.

[0068] By employing the steps described above in this application embodiment, combined with advanced sensing technology, data analysis technology, and artificial intelligence algorithms, the operating status of thermal power units can be detected in real time, potential fault hazards (such as coal feed rate faults) can be identified, and early warnings can be issued before a fault occurs. In the event of a fault, the faulty coal mill can be shut down in a timely manner, while the coal mill can be quickly restored to normal operation. This improves the automated response capability of the coal mill in abnormal situations, reduces downtime caused by faults, minimizes the impact of faults on production, and improves the overall operating efficiency and reliability of the equipment. This solves the problem of how to reduce the impact of coal mill faults on the production progress of thermal power units.

[0069] It should be noted that the steps shown in the above process or in the flowchart of the accompanying figures can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0070] This application provides a self-healing system for handling abnormal operating conditions of a coal mill. Figure 2 This is a structural block diagram of a coal mill abnormal operating condition self-healing system according to an embodiment of this application, as shown below. Figure 2 As shown, the system includes a data acquisition module, a fault detection module, and a self-healing module;

[0071] The data acquisition module is used to acquire data from the coal mills in thermal power generating units;

[0072] The fault detection module is used to detect whether a coal feeding failure has occurred in the thermal power generating unit based on coal mill data and an artificial intelligence calculation model.

[0073] The self-healing module is used to shut down the coal feeder involved in the coal feeder failure, stop the grinding sequence of the corresponding coal mill, and ensure the safety of the coal mill outlet temperature if a coal feeder failure occurs.

[0074] The self-healing module is used to start the standby coal mill and, while ensuring the safety of the standby coal mill, to start the coal feeder.

[0075] Through the data acquisition module, fault detection module, and self-healing module in this application embodiment, combined with advanced sensing technology, data analysis technology, and artificial intelligence algorithms, the operating status of thermal power units can be detected in real time, potential fault hazards (such as coal feed rate faults) can be identified, and warnings can be issued before a fault occurs. In the event of a fault, the faulty coal mill can be shut down in a timely manner, while the coal mill can be quickly restored to normal operation. This improves the automatic response capability of the coal mill in abnormal situations, reduces downtime caused by faults, minimizes the impact of faults on production, improves the overall operating efficiency and reliability of the equipment, and solves the problem of how to reduce the impact of coal mill faults on the production progress of thermal power units.

[0076] It should be noted that the above modules can be functional modules or program modules, and can be implemented through software or hardware. For modules implemented through hardware, the above modules can reside in the same processor; or the above modules can be located in different processors in any combination.

[0077] This embodiment also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.

[0078] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor and the input / output device is connected to the processor.

[0079] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0080] Furthermore, in conjunction with the coal mill abnormal operating condition self-healing method in the above embodiments, this application embodiment can provide a storage medium for implementation. This storage medium stores a computer program; when executed by a processor, the computer program implements any of the coal mill abnormal operating condition self-healing methods in the above embodiments.

[0081] In one embodiment, a computer device is provided, which may be a terminal. The computer device includes a processor, memory, a network interface, a display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, it implements a self-healing method for abnormal operating conditions of a coal mill. The display screen may be a liquid crystal display (LCD) or an e-ink display. The input devices may be a touch layer covering the display screen, buttons, a trackball, or a touchpad mounted on the computer device casing, or an external keyboard, touchpad, or mouse.

[0082] In one embodiment, Figure 3 This is a schematic diagram of the internal structure of an electronic device according to an embodiment of this application, such as... Figure 3As shown, an electronic device is provided, which can be a server, and its internal structure diagram can be as follows. Figure 3 As shown, the electronic device includes a processor, a network interface, internal memory, and non-volatile memory connected via an internal bus. The non-volatile memory stores the operating system, computer programs, and a database. The processor provides computing and control capabilities, the network interface communicates with external terminals via a network connection, the internal memory provides an environment for the operation of the operating system and computer programs, the computer programs are executed by the processor to implement a self-healing method for abnormal operating conditions of a coal mill, and the database stores data.

[0083] Those skilled in the art will understand that Figure 3 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the electronic device to which the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0084] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0085] Those skilled in the art should understand that the technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A self-healing method for handling abnormal operating conditions of a coal mill, characterized in that, The method includes: Obtain data from the coal mills in thermal power generating units; Based on the coal mill data, the coal-fired power generating unit is detected for coal shortage faults using an artificial intelligence calculation model, and the coal blockage faults are also detected using an artificial intelligence calculation model. If the thermal power generating unit has the coal shortage fault and / or the coal blockage fault, then it is determined that the thermal power generating unit has a coal feed rate fault. If the coal feed rate failure occurs, shutting down the coal feeder involved in the coal feed rate failure includes: shutting down the ACC control of the coal feeder involved in the coal feed rate failure, gradually reducing the coal feed rate of the coal feeder until the coal feeder is shut down; The coal milling sequence for stopping the corresponding coal mill includes: gradually reducing the separator speed of the corresponding coal mill until the separator is closed; when the current of the coal mill is less than a preset current threshold, raising the grinding rollers of the coal mill; gradually closing the hot air damper to the first opening; and gradually opening the cold air damper to the second opening. Ensuring the safety of the coal mill's outlet temperature includes: if the coal mill's outlet temperature is greater than a preset temperature threshold, opening the coal mill's fire extinguishing steam shut-off valve and maintaining it for a preset time before closing the fire extinguishing steam shut-off valve; if the coal mill's outlet temperature is trending downwards, adjusting the hot air pneumatic isolation door and the cold air pneumatic isolation door to shut down the coal mill, lowering the coal mill's grinding rollers, and opening the hydraulic reversing valve. Start the standby coal mill, and then start the coal feeder while ensuring the safety of the standby coal mill.

2. The method according to claim 1, characterized in that, Based on the coal mill data, the detection of coal shortage faults in the thermal power generating unit using an artificial intelligence calculation model includes: Based on the coal mill data, the coal feed rate of the thermal power generating unit is detected by an artificial intelligence calculation model. If the detected decrease in the coal feed rate is greater than a preset threshold, the thermal power generating unit will experience a coal shortage fault.

3. The method according to claim 1, characterized in that, Based on the coal mill data, the detection of coal blockage faults in the thermal power generating unit using an artificial intelligence calculation model includes: Based on the coal mill data, the thermal power generating unit is tested for coal blockage faults using an artificial intelligence calculation model. If any abnormal fluctuation is detected in at least one of the following: coal mill inlet and outlet air volume, coal mill current, coal mill outlet temperature, and coal mill ventilation resistance, then the thermal power generating unit has experienced a coal blockage fault.

4. The method according to claim 1, characterized in that, Starting up the standby coal mill includes: Start the low-speed oil pump, loading oil pump and separator of the standby coal mill, open the sealing damper, hydraulic station variable loading solenoid valve and stone coal hopper pneumatic gate valve of the standby coal mill, and close the stone coal hopper sealing chamber. Adjust the opening of the hot air damper and the cold air damper of the standby coal mill to enter the ignition mode.

5. The method according to claim 4, characterized in that, Starting the coal feeder, while ensuring the safety of the standby coal mill, includes: Close the hydraulic directional valve of the standby coal mill and raise the grinding rollers of the standby coal mill to start the standby coal mill and the coal feeder.

6. A self-healing system for abnormal operating conditions of a coal mill, characterized in that, The system is used to perform the method according to any one of claims 1 to 5, and the system includes a data acquisition module, a fault detection module, and a self-healing processing module; The data acquisition module is used to acquire data from the coal mill in the thermal power generating unit; The fault detection module is used to detect whether the coal feed rate of the thermal power generating unit has failed based on the coal mill data and an artificial intelligence calculation model. The self-healing module is used to shut down the coal feeder involved in the coal feeder failure, stop the grinding sequence of the corresponding coal mill, and ensure the safety of the coal mill outlet temperature if the coal feeder failure occurs. The self-healing module is used to start the standby coal mill and, while ensuring the safety of the standby coal mill, to start the coal feeder.

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