Method and system for pre-judging state of grinding roller of bowl type coal mill

Abstract

The invention relates to the technical field of state real-time pre-judgment of a grinding roller of a coal mill, and provides a bowl type coal mill grinding roller state pre-judgment method and system, and the method comprises the steps: obtaining key factors affecting the motor current of a coal mill; establishing a coal mill current mathematical model based on each key factor; the ideal state current value of the coal mill is obtained through regression calculation through the mathematical model of the current of the coal mill; calculating a grinding roller performance factor based on the ideal state current value of the coal mill; according to the coal making quantity factor of the bowl type coal mill, obtaining a milling roller coal making quantity factor of the bowl type coal mill; obtaining a grinding roller production time factor of the bowl type coal mill according to the grinding roller production time factor of the bowl type coal mill; and according to the grinding roller performance factor, the grinding roller coal production quantity factor and the grinding roller production time factor, grinding roller state value data reflecting the grinding roller state of the bowl type coal mill is obtained through calculation. The method can realize real-time pre-judgment of the state of the grinding roller of the coal mill, and is suitable for overhauling and maintaining the grinding roller equipment of the bowl-type coal mill.

Description

Technical Field

[0001] The invention relates to the technical field of real-time prediction of the state of a coal mill roller, and in particular to a method and system for predicting the state of a bowl-type coal mill roller. Background Art

[0002] The gap between the grinding roller and the grinding bowl and the wear of the grinding roller during the operation of the coal mill directly affect the output and safe operation of the coal mill. At present, the status of the grinding roller of the coal mill is usually checked in the following ways:

[0003] First, the coal mill is stopped to measure and inspect the gap between the internal rollers of the coal mill.

[0004] The second is to use the unit maintenance opportunity to inspect or replace the coal mill rollers;

[0005] Third, the grinding roller of the coal mill is abnormal during operation and needs emergency replacement and maintenance;

[0006] At present, the inspection, examination and maintenance of the mill rollers are carried out in accordance with the above three traditional methods, especially the first method. Regardless of whether the mill rollers need to be inspected and maintained, the mill must be shut down for inspection and maintenance, which consumes a lot of manpower and material resources and maintenance costs. The operating personnel frequently isolate the system, the operation is frequent and complicated, and the safety is reduced. The second method of the mill roller inspection cannot achieve accurate inspection, and the state of the roller can only be found after disassembly; the third method is easy to cause the maintenance of the roller to be delayed and damaged, and the maintenance cost is increased. Summary of the invention

[0007] The purpose of the present invention is to solve at least one technical problem in the background technology and to provide a method and system for predicting the state of a bowl-type coal mill roller.

[0008] To achieve the above object, the present invention provides a method for predicting the state of a bowl-type coal mill roller, comprising:

[0009] Obtain the key factors affecting the motor current of coal mill;

[0010] Based on the key factors, a mathematical model of the coal mill current after the coal mill roller is replaced, before the replacement, and during normal production is established;

[0011] The ideal current value of the coal mill is obtained by regression calculation using the coal mill current mathematical model;

[0012] The roller performance factor is calculated based on the ideal current value of the coal mill;

[0013] According to the coal production factor of the bowl-type coal mill, the coal production factor of the bowl-type coal mill roller is obtained;

[0014] Obtain the production time factor of the bowl-type coal mill roller according to the production time factor of the bowl-type coal mill roller;

[0015] The grinding roller status value data reflecting the status of the bowl-type coal mill grinding roller is calculated based on the grinding roller performance factor, the grinding roller coal production amount factor and the grinding roller production time factor.

[0016] According to one aspect of the present invention, the key factors affecting the motor current of the coal mill include: roller loading pressure, separator speed, grinding coal quantity, outlet temperature, inlet and outlet differential pressure, and air volume.

[0017] According to one aspect of the present invention, the mathematical model of coal mill current after, before and after replacement of coal mill rollers and during normal production is established based on the key factors as follows:

[0018] y=f(x1, x2, x3, x4, x5, x6...), where y is the ideal current of the coal mill; x1 is the roller loading pressure, x2 is the separator speed, x3 is the amount of ground coal, x4 is the outlet temperature, x5 is the inlet and outlet differential pressure, and x6 is the air volume.

[0019] According to one aspect of the present invention, the ideal current value of the coal mill is obtained by regression calculation using the coal mill current mathematical model:

[0020] The ideal current value of the coal mill is obtained by regression calculation based on the current mathematical model after the coal mill roller is replaced.

[0021] According to one aspect of the present invention, the grinding roller performance factor is the ratio of the ideal current value of the coal mill during production to the actual current value of the coal mill during production.

[0022] According to one aspect of the present invention, the grinding roller coal production factor is the ratio of the warning coal production during the production period to the actual cumulative coal production during the production period;

[0023] Among them, the warning coal production volume is equal to the maximum cumulative limit value of the production coal production volume during the entire grinding roller value period.

[0024] According to one aspect of the present invention, the grinding roller production time factor is the ratio of the cumulative warning time during production to the actual cumulative time during production;

[0025] Among them, the cumulative warning time is equal to the maximum cumulative limit value of production time during the entire grinding roller value period.

[0026] According to one aspect of the present invention, the roller status value data reflecting the status of the bowl-type coal mill roller is calculated based on the roller performance factor, the roller coal production factor and the roller production time factor as follows:

[0027] Grinding roller status value data = ((100-grinding roller coal production factor*20)+(100-grinding roller operation time factor*20)+grinding roller current performance factor*100) / 3.

[0028] To achieve the above object, the present invention also provides a bowl-type coal mill roller state prediction system, comprising:

[0029] Key factor acquisition module, to acquire key factors affecting coal mill motor current;

[0030] A coal mill current mathematical model building module is used to build a coal mill current mathematical model after the coal mill roller is replaced, before the replacement, and during normal production based on the key factors;

[0031] A coal mill ideal state current value calculation module, which obtains the coal mill ideal state current value by regression calculation using the coal mill current mathematical model;

[0032] A roller performance factor calculation module is used to calculate the roller performance factor based on the ideal current value of the coal mill;

[0033] The roller coal production factor calculation module obtains the roller coal production factor of the bowl-type coal mill according to the coal production factor of the bowl-type coal mill;

[0034] A roller production time factor calculation module is used to obtain the roller production time factor of the bowl-type coal mill according to the roller production time factor of the bowl-type coal mill;

[0035] The roller state value calculation module calculates the roller state value data reflecting the roller state of the bowl coal mill according to the roller performance factor, the roller coal production amount factor and the roller production time factor.

[0036] To achieve the above objectives, the present invention also provides an electronic device, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the method for predicting the state of a bowl mill roller as described above.

[0037] To achieve the above object, the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the method for predicting the state of a bowl mill roller is implemented as described above.

[0038] According to the scheme of the present invention, the comprehensive valuation bowl-type coal mill roller state prediction method provided by the present invention can realize the value supervision of the coal mill roller state in the whole production process, and can timely reflect the dynamic reflection value of the internal roller state of the coal mill. When the value reaches the critical value, the roller needs to be maintained or replaced. The present invention solves the problems of real-time state value supervision, management, and maintenance of the roller in production, makes the inspection and maintenance of the coal mill roller clear, avoids disorderly inspection and maintenance, reduces production costs, and ensures the reliability of the coal mill roller in the economic operation range and production.

[0039] According to the scheme of the present invention, by estimating the status value of the grinding roller, an important component of the coal mill, the performance, wear degree, and gap between the grinding roller and the disc shoe of the coal mill are grasped in real time, thereby ensuring the reliable and economical operation of the coal mill.

[0040] The present invention can realize the value status maintenance and overhaul of the coal mill roller, monitor the internal operation of the coal mill in real time, effectively avoid the frequent start and stop and ineffective shutdown and overhaul of the coal mill, and ensure the mode optimization flexibility and reliability of the coal mill.

[0041] The present invention is beneficial for accurately selecting the coal mill that needs to be maintained and repaired during the planned maintenance of the unit, and realizing accurate overhaul and maintenance of the grinding roller of the coal mill.

[0042] The present invention can establish a coal mill roller accurate maintenance database and ledger, which is conducive to rapid query and event tracing.

[0043] The present invention can realize the status maintenance of the coal mill roller, save maintenance expenses and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 The flowchart schematically shows a method for predicting the state of a bowl coal mill roller according to an embodiment of the present invention. DETAILED DESCRIPTION

[0045] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only to enable those skilled in the art to better understand and thus implement the present invention, rather than implying any limitation on the scope of the present invention.

[0046] As used herein, the term “including” and variations thereof are to be interpreted as open-ended terms meaning “including, but not limited to.” The term “based on” is to be interpreted as “based, at least in part, on.” The terms “one embodiment” and “an embodiment” are to be interpreted as “at least one embodiment.”

[0047] Figure 1 The flowchart schematically shows a method for predicting the state of a bowl-type coal mill roller according to an embodiment of the present invention. Figure 1As shown, in this embodiment, the method for predicting the state of a bowl-type coal mill roller includes:

[0048] Obtain the key factors affecting the motor current of coal mill;

[0049] Based on the key factors, a mathematical model of the coal mill current after the coal mill roller is replaced, before the replacement, and during normal production is established;

[0050] The ideal current value of the coal mill is obtained by regression calculation using the coal mill current mathematical model;

[0051] The roller performance factor is calculated based on the ideal current value of the coal mill;

[0052] According to the coal production factor of the bowl-type coal mill, the coal production factor of the bowl-type coal mill roller is obtained;

[0053] Obtain the production time factor of the bowl-type coal mill roller according to the production time factor of the bowl-type coal mill roller;

[0054] The roller status value data reflecting the status of the bowl-type coal mill roller is calculated based on the roller performance factor, the roller coal production factor and the roller production time factor. Such a scheme can realize the real-time prediction of the status of the coal mill roller, which is suitable for the inspection and maintenance of the bowl-type coal mill roller equipment, and the real-time prediction of the status of the coal mill roller can realize the status inspection and maintenance of the coal mill roller.

[0055] Further, according to an embodiment of the present invention, the key factors affecting the motor current of the coal mill include: roller loading pressure, separator speed, grinding coal quantity, outlet temperature, inlet and outlet differential pressure, and air volume.

[0056] Further, according to an embodiment of the present invention, a mathematical model of coal mill current after, before and after replacement of coal mill rollers and during normal production is established based on the key factors as follows:

[0057] y=f(x1, x2, x3, x4, x5, x6...), where y is the ideal current of the coal mill; x1 is the roller loading pressure, x2 is the separator speed, x3 is the amount of ground coal, x4 is the outlet temperature, x5 is the inlet and outlet differential pressure, and x6 is the air volume.

[0058] In this embodiment, under the conditions of the same coal quantity and other key factors, the current changes of the coal mill after and before replacing the grinding roller can be statistically analyzed to obtain the performance parameter value of the coal mill current, that is, the current ratio change within a cycle, which is used for coal mill performance monitoring.

[0059] In this embodiment, based on the above-mentioned current mathematical model after the coal mill roller is replaced, the ideal current value of the coal mill can be obtained through regression calculation.

[0060] Further, according to an embodiment of the present invention, the grinding roller performance factor is the ratio of the ideal current value of the coal mill during production to the actual current value of the coal mill during production.

[0061] Further, according to an embodiment of the present invention, the roller coal production factor is the ratio of the warning coal production during the production period to the actual cumulative coal production during the production period;

[0062] Among them, the warning coal production volume is equal to the maximum cumulative limit value of the production coal production volume during the entire grinding roller value period.

[0063] In this embodiment, the warning coal production volume is the cumulative value of the maximum coal production volume during the grinding roller value period, that is, the cumulative coal volume from the time the grinding rollers and grinding discs of the coal mill were replaced and put into operation to the time they were replaced again is averaged to obtain the maximum cumulative limit value of the production coal production during the entire grinding roller value period.

[0064] Further, according to one embodiment of the present invention, the grinding roller production time factor is the ratio of the cumulative warning time during the production period to the actual cumulative time during the production period;

[0065] Among them, the cumulative warning time is equal to the maximum cumulative limit value of production time during the entire grinding roller value period.

[0066] In this embodiment, the accumulated warning time is the longest production time value of the grinding roller value period, that is, the accumulated production time from the replacement and commissioning of the grinding rollers and grinding discs of the coal mill to their replacement is averaged to obtain the maximum accumulated limit value of the production time within the entire grinding roller value period.

[0067] Further, according to an embodiment of the present invention, the roller status value data reflecting the status of the bowl-type coal mill roller is calculated based on the roller performance factor, the roller coal production factor and the roller production time factor as follows:

[0068] Grinding roller status value data = ((100-grinding roller coal production factor*20)+(100-grinding roller operation time factor*20)+grinding roller current performance factor*100) / 3.

[0069] In this embodiment, the maximum value of the roller status value data in production is 100. When it is lower than 80, inspection or maintenance should be carried out to improve the roller status value of the coal mill and realize efficient and economical production of the coal mill.

[0070] According to the above scheme of the present invention, the comprehensive valuation bowl-type coal mill roller state prediction method provided by the present invention can realize the value supervision of the coal mill roller state in the whole production process, and can timely reflect the dynamic reflection value of the internal roller state of the coal mill. When the value reaches the critical value, the roller needs to be maintained or replaced. The present invention solves the problems of real-time state value supervision, management, and maintenance of the roller in production, makes the inspection and maintenance of the coal mill roller clear, avoids disorderly inspection and maintenance, reduces production costs, and ensures the reliability of the coal mill roller in the economic operation range and production.

[0071] According to the above scheme of the present invention, by estimating the status value of the grinding roller, an important component of the coal mill, the performance, wear degree, and gap between the grinding roller and the disc shoe of the coal mill are grasped in real time, thereby ensuring the reliable and economical operation of the coal mill.

[0072] The present invention can realize the value status maintenance and overhaul of the coal mill roller, monitor the internal operation of the coal mill in real time, effectively avoid the frequent start and stop and ineffective shutdown and overhaul of the coal mill, and ensure the mode optimization flexibility and reliability of the coal mill.

[0073] The present invention is beneficial for accurately selecting the coal mill that needs to be maintained and repaired during the planned maintenance of the unit, and realizing accurate overhaul and maintenance of the grinding roller of the coal mill.

[0074] The present invention can establish a coal mill roller accurate maintenance database and ledger, which is conducive to rapid query and event tracing.

[0075] The present invention can realize the status maintenance of the coal mill roller, save maintenance expenses and reduce production costs.

[0076] Furthermore, in order to achieve the above-mentioned purpose, the present invention also provides a bowl-type coal mill roller state prediction system, comprising:

[0077] Key factor acquisition module, to acquire key factors affecting coal mill motor current;

[0078] A coal mill current mathematical model building module is used to build a coal mill current mathematical model after the coal mill roller is replaced, before the replacement, and during normal production based on the key factors;

[0079] A coal mill ideal state current value calculation module, which obtains the coal mill ideal state current value by regression calculation using the coal mill current mathematical model;

[0080] A roller performance factor calculation module is used to calculate the roller performance factor based on the ideal current value of the coal mill;

[0081] The roller coal production factor calculation module obtains the roller coal production factor of the bowl-type coal mill according to the coal production factor of the bowl-type coal mill;

[0082] A roller production time factor calculation module is used to obtain the roller production time factor of the bowl-type coal mill according to the roller production time factor of the bowl-type coal mill;

[0083] The roller status value calculation module calculates the roller status value data reflecting the status of the bowl-type coal mill roller according to the roller performance factor, the roller coal production factor and the roller production time factor. Such a scheme can realize the real-time prejudgment processing of the status of the coal mill roller, which is suitable for the inspection and maintenance of the bowl-type coal mill roller equipment, and the real-time prejudgment processing of the status of the coal mill roller can realize the status inspection and maintenance of the coal mill roller.

[0084] Further, according to an embodiment of the present invention, the key factors affecting the motor current of the coal mill include: roller loading pressure, separator speed, grinding coal quantity, outlet temperature, inlet and outlet differential pressure, and air volume.

[0085] Further, according to an embodiment of the present invention, a mathematical model of coal mill current after, before and after replacement of coal mill rollers and during normal production is established based on the key factors as follows:

[0086] y=f(x1, x2, x3, x4, x5, x6...), where y is the ideal current of the coal mill; x1 is the roller loading pressure, x2 is the separator speed, x3 is the amount of ground coal, x4 is the outlet temperature, x5 is the inlet and outlet differential pressure, and x6 is the air volume.

[0087] In this embodiment, under the conditions of the same coal quantity and other key factors, the current changes of the coal mill after and before replacing the grinding roller can be statistically analyzed to obtain the performance parameter value of the coal mill current, that is, the current ratio change within a cycle, which is used for coal mill performance monitoring.

[0088] In this embodiment, the ideal current value of the coal mill can be obtained by regression calculation using the current mathematical model after the coal mill roller is replaced.

[0089] Further, according to an embodiment of the present invention, the grinding roller performance factor is the ratio of the ideal current value of the coal mill during production to the actual current value of the coal mill during production.

[0090] Further, according to an embodiment of the present invention, the roller coal production factor is the ratio of the warning coal production during the production period to the actual cumulative coal production during the production period;

[0091] Among them, the warning coal production volume is equal to the maximum cumulative limit value of the production coal production volume during the entire grinding roller value period.

[0092] In this embodiment, the warning coal production volume is the cumulative value of the maximum coal production volume during the grinding roller value period, that is, the cumulative coal volume from the time the grinding rollers and grinding discs of the coal mill were replaced and put into operation to the time they were replaced again is averaged to obtain the maximum cumulative limit value of the production coal production during the entire grinding roller value period.

[0093] Further, according to one embodiment of the present invention, the grinding roller production time factor is the ratio of the cumulative warning time during the production period to the actual cumulative time during the production period;

[0094] Among them, the cumulative warning time is equal to the maximum cumulative limit value of production time during the entire grinding roller value period.

[0095] In this embodiment, the accumulated warning time is the longest production time value of the grinding roller value period, that is, the accumulated production time from the replacement and commissioning of the grinding rollers and grinding discs of the coal mill to their replacement is averaged to obtain the maximum accumulated limit value of the production time within the entire grinding roller value period.

[0096] Further, according to an embodiment of the present invention, the roller status value data reflecting the status of the bowl-type coal mill roller is calculated based on the roller performance factor, the roller coal production factor and the roller production time factor as follows:

[0097] Grinding roller status value data = ((100-grinding roller coal production factor*20)+(100-grinding roller operation time factor*20)+grinding roller current performance factor*100) / 3.

[0098] In this embodiment, the maximum value of the roller status value data in production is 100. When it is lower than 80, inspection or maintenance should be carried out to improve the roller status value of the coal mill and realize efficient and economical production of the coal mill.

[0099] According to the above scheme of the present invention, the comprehensive valuation bowl-type coal mill roller state prediction method provided by the present invention can realize the value supervision of the coal mill roller state in the whole production process, and can timely reflect the dynamic reflection value of the internal roller state of the coal mill. When the value reaches the critical value, the roller needs to be maintained or replaced. The present invention solves the problems of real-time state value supervision, management, and maintenance of the roller in production, makes the inspection and maintenance of the coal mill roller clear, avoids disorderly inspection and maintenance, reduces production costs, and ensures the reliability of the coal mill roller in the economic operation range and production.

[0100] According to the above scheme of the present invention, by estimating the status value of the grinding roller, an important component of the coal mill, the performance, wear degree, and gap between the grinding roller and the disc shoe of the coal mill are grasped in real time, thereby ensuring the reliable and economical operation of the coal mill.

[0101] The present invention can realize the value status maintenance and overhaul of the coal mill roller, monitor the internal operation of the coal mill in real time, effectively avoid the frequent start and stop and ineffective shutdown and overhaul of the coal mill, and ensure the mode optimization flexibility and reliability of the coal mill.

[0102] The present invention is beneficial for accurately selecting the coal mill that needs to be maintained and repaired during the planned maintenance of the unit, and realizing accurate overhaul and maintenance of the grinding roller of the coal mill.

[0103] The present invention can establish a coal mill roller accurate maintenance database and ledger, which is conducive to rapid query and event tracing.

[0104] The present invention can realize the status maintenance of the coal mill roller, save maintenance expenses and reduce production costs.

[0105] Furthermore, to achieve the above-mentioned purpose, the present invention also provides an electronic device, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the method for predicting the state of a bowl mill roller is implemented as described above.

[0106] Furthermore, to achieve the above-mentioned purpose, the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method for predicting the state of a bowl mill roller as described above is implemented.

[0107] Those skilled in the art will appreciate that the modules and algorithm steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0108] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and equipment can refer to the corresponding processes in the aforementioned method implementation methods, and will not be repeated here.

[0109] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0110] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiments of the present invention.

[0111] In addition, each functional module in the embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module.

[0112] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the energy-saving signal sending / receiving method of each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical disks.

[0113] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

[0114] It should be understood that the size of the serial numbers of each step in the content of the invention and the implementation methods of the present invention does not absolutely mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the implementation methods of the present invention.

Claims

1. A method for predicting the state of a bowl-type coal mill roller, characterized in that: include: Obtain the key factors affecting the motor current of coal mill; Based on the key factors, a mathematical model of the coal mill current after the coal mill roller is replaced, before the replacement, and during normal production is established; The ideal current value of the coal mill is obtained by regression calculation using the coal mill current mathematical model; The roller performance factor is calculated based on the ideal current value of the coal mill; According to the coal production factor of the bowl-type coal mill, the coal production factor of the bowl-type coal mill roller is obtained; Obtain the production time factor of the bowl-type coal mill roller according to the production time factor of the bowl-type coal mill roller; The grinding roller status value data reflecting the status of the bowl-type coal mill grinding roller is calculated based on the grinding roller performance factor, the grinding roller coal production amount factor and the grinding roller production time factor.

2. The method for predicting the state of a bowl-type coal mill roller according to claim 1, characterized in that: The key factors affecting the motor current of the coal mill include: roller loading pressure, separator speed, grinding coal quantity, outlet temperature, inlet and outlet differential pressure, and air volume.

3. The method for predicting the state of a bowl-type coal mill roller according to claim 2, characterized in that: The mathematical model of coal mill current established based on the key factors after the coal mill roller is replaced, before the replacement, and during normal production is: y=f(x1, x2, x3, x4, x5, x6...), where y is the ideal current of the coal mill; x1 is the roller loading pressure, x2 is the separator speed, x3 is the amount of ground coal, x4 is the outlet temperature, x5 is the inlet and outlet differential pressure, and x6 is the air volume.

4. The method for predicting the state of a bowl-type coal mill roller according to claim 3, characterized in that: The ideal current value of the coal mill is obtained by regression calculation using the coal mill current mathematical model: The ideal current value of the coal mill is obtained by regression calculation based on the current mathematical model after the coal mill roller is replaced.

5. The method for predicting the state of a bowl-type coal mill roller according to claim 1, characterized in that: The grinding roller performance factor is the ratio of the ideal current value of the coal mill during production to the actual current value of the coal mill during production.

6. The method for predicting the state of a bowl-type coal mill roller according to claim 1, characterized in that: The roller coal production factor is the ratio of the warning coal production during the production period to the actual cumulative coal production during the production period; Among them, the warning coal production volume is equal to the maximum cumulative limit value of the production coal production volume during the entire grinding roller value period.

7. The method for predicting the state of a bowl-type coal mill roller according to claim 1, characterized in that: The grinding roller production time factor is the ratio of the cumulative warning time during the production period to the actual cumulative time during the production period; Among them, the cumulative warning time is equal to the maximum cumulative limit value of production time during the entire grinding roller value period.

8. The method for predicting the state of a bowl-type coal mill roller according to any one of claims 1 to 7, characterized in that: The roller status value data reflecting the status of the bowl-type coal mill roller is calculated based on the roller performance factor, the roller coal production factor and the roller production time factor as follows: Grinding roller status value data = ((100-grinding roller coal production factor*20)+(100-grinding roller operation time factor*20)+grinding roller current performance factor*100) / 3.

9. Bowl mill roller state prediction system, characterized by: include: A key factor acquisition module is used to acquire key factors affecting the motor current of the coal mill; A coal mill current mathematical model building module is used to build a coal mill current mathematical model after the coal mill roller is replaced, before the replacement, and during normal production based on the key factors; A coal mill ideal state current value calculation module, which obtains the coal mill ideal state current value by regression calculation using the coal mill current mathematical model; A roller performance factor calculation module is used to calculate the roller performance factor based on the ideal current value of the coal mill; The roller coal production factor calculation module obtains the roller coal production factor of the bowl-type coal mill according to the coal production factor of the bowl-type coal mill; A roller production time factor calculation module is used to obtain the roller production time factor of the bowl-type coal mill according to the roller production time factor of the bowl-type coal mill; The roller state value calculation module calculates the roller state value data reflecting the roller state of the bowl coal mill according to the roller performance factor, the roller coal production amount factor and the roller production time factor.

10. An electronic device, characterized in that The method comprises a processor, a memory and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the method for predicting the state of a bowl-type coal mill roller as described in any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for predicting the state of a bowl mill roller according to any one of claims 1 to 8 is implemented.

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