Coal mill capacity expansion and efficiency improvement method and device based on numerical simulation coupling flow field optimization

Abstract

The application provides a coal mill capacity-increasing and efficiency-improving method and device based on numerical simulation coupling flow field optimization, and belongs to the field of computer simulation calculation. The method comprises the following steps: constructing a three-dimensional geometric model of the inside of a coal mill; obtaining real-time operation data of the coal mill; establishing a numerical simulation model according to the real-time operation data of the coal mill and the three-dimensional geometric model of the inside of the coal mill; setting the position of a flow guide plate, performing numerical simulation calculation by using the numerical simulation model, and obtaining a numerical simulation result; performing optimization adjustment according to the numerical simulation result, and obtaining a flow guide plate position scheme with the most uniform airflow distribution and the highest coal powder grinding efficiency; and automatically adjusting the position of the flow guide plate in the coal mill according to the flow guide plate position scheme by a control system. The numerical simulation calculation performed by setting the position of the flow guide plate can accurately analyze the influence of the angle and position of the flow guide plate on the airflow distribution and the movement track of the coal powder, and improve the accuracy of control and the optimization effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of computer simulation calculation, in particular to a coal mill capacity increasing and efficiency improving method based on numerical simulation coupled flow field optimization and a coal mill capacity increasing and efficiency improving device based on numerical simulation coupled flow field optimization. BACKGROUND

[0002] Coal mill: Coal mill is an important grinding equipment in industrial production such as power plants and cement plants. Traditional coal mill design relies on empirical formula and experimental data, which is difficult to fully consider the complex multiphase flow and particle breakage behavior in the grinding process, resulting in low grinding efficiency, high energy consumption, and serious equipment wear and tear.

[0003] Numerical simulation: also known as computer simulation method or numerical analysis method, is a technology that uses computers to perform numerical calculations to simulate and emulate certain physical processes or phenomena. This method is widely used in engineering, science, medicine and other fields, especially in the field of engineering. Numerical simulation method has been widely used in the field of fluid dynamics and particle dynamics, providing a new way for the optimization design and operation control of coal mill.

[0004] The existing coal mill guide vane design often relies on experience or trial and error method, which not only consumes time and effort, but also cannot guarantee the best guide vane configuration scheme. At the same time, due to the complexity of the internal flow field of the coal mill, it is difficult to accurately obtain the information of the air flow distribution by traditional experimental method, so that the angle and position of the guide vane cannot be accurately adjusted. These problems seriously restrict the improvement of coal mill performance and the improvement of coal processing efficiency. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a coal mill capacity increasing and efficiency improving method and device based on numerical simulation coupled flow field optimization, aiming to solve the technical problems of lack of scientific basis for the placement angle and strategy of the guide vane of the coal mill, uneven air flow distribution, and low coal powder grinding efficiency in the prior art.

[0006] In order to achieve the above-mentioned purpose, the first aspect of the present application provides a coal mill capacity increasing and efficiency improving method based on numerical simulation coupled flow field optimization, which comprises:

[0007] Constructing a three-dimensional geometric model of the internal part of the coal mill;

[0008] Obtaining real-time operation data of the coal mill;

[0009] Establishing a numerical simulation model according to the real-time operation data of the coal mill and the three-dimensional geometric model of the internal part of the coal mill;

[0010] The position of the guide plate is set, numerical simulation calculation is performed by using a numerical simulation model, and a numerical simulation result is obtained;

[0011] According to the numerical simulation result, optimization adjustment is performed, and a guide plate position scheme in which air flow distribution is most uniform and coal powder grinding efficiency is highest is obtained;

[0012] The control system automatically adjusts the position of the guide plate in the coal mill according to the guide plate position scheme.

[0013] According to the above technical means, the structure and fluid flow characteristics in the coal mill can be accurately simulated according to real-time operation data of the coal mill and a three-dimensional geometric model of the coal mill. Then, the position of the guide plate is set for numerical simulation calculation, so that the influence of the angle and position of the guide plate on air flow distribution and the trajectory of coal powder movement can be accurately analyzed, and the accuracy of control and optimization effect are improved.

[0014] In the embodiment of the application, the three-dimensional geometric model of the coal mill is constructed, including:

[0015] Obtaining internal structure parameters of the coal mill;

[0016] Simulating and constructing a three-dimensional geometric model of the coal mill according to the structure parameters of the coal mill;

[0017] The three-dimensional geometric model of the coal mill includes a grinding disc, a damper, and a guide plate, and the position of the guide plate is adjustable.

[0018] According to the above technical means, the three-dimensional geometric model of the coal mill is simulated and constructed based on the internal structure parameters of the coal mill, which can accurately reflect the internal structure of the coal mill, so that subsequent air flow distribution analysis is completely based on the actual coal mill, and the accuracy is improved.

[0019] In the embodiment of the application, the real-time operation data of the coal mill is obtained, including:

[0020] The real-time operation data of the coal mill is read from the coal mill control system, and the real-time operation data of the coal mill includes rotational speed, actual wind speed of dynamic and static ring air speed, coal quantity, and coal quality characteristics.

[0021] According to the above technical means, the real-time operation data of the coal mill can be accurately obtained, which facilitates flexible determination of the angle and position of the guide plate according to the real-time operation data. The angle and position of the guide plate can be adaptively adjusted according to different coal types and different operating conditions.

[0022] In the embodiment of the application, a numerical simulation model is established according to the real-time operation data of the coal mill and the three-dimensional geometric model of the coal mill, including:

[0023] The real-time operation data of the coal mill is input into the CFD software;

[0024] Set the initial conditions and boundary conditions of the CFD calculation;

[0025] Based on the three-dimensional geometric model of the inside of the coal mill, a numerical simulation model is established.

[0026] According to the technical means, the numerical simulation model can be constructed according to the real-time operation data of the coal mill, and data basis is provided for subsequent numerical simulation calculation.

[0027] In the embodiment of the application, the position of the guide plate is set, numerical simulation calculation is performed by using the numerical simulation model, and numerical simulation results are obtained, including:

[0028] The adjustable range of different guide plates is equally divided according to a preset value, and a position array of different guide plates is obtained;

[0029] The position arrays of different guide plates are arranged and combined to obtain a plurality of guide plate installation position arrays;

[0030] The numerical simulation model is used to perform fluid dynamics numerical simulation calculation on each group of guide plate installation position arrays, and numerical simulation results corresponding to each group of guide plate installation positions are obtained.

[0031] According to the technical means, numerical simulation calculation can be performed on the positions of different guide plates, and the numerical simulation results corresponding to each group of guide plate installation positions are used for air flow distribution and coal powder grinding efficiency analysis.

[0032] In the embodiment of the application, the guide plate at least includes a first guide plate and a second guide plate vertically arranged on both sides of the air door and a third guide plate horizontally arranged between the first guide plate and the second guide plate.

[0033] The position array of different guide plates includes removal of the guide plate and deflection of the guide plate in different angles of the air inlet direction.

[0034] According to the technical means, adding a horizontally arranged guide plate upwardly inclined between two vertically arranged guide plates can realize different wind speeds, and the optimal control strategy can be explored.

[0035] In the embodiment of the application, according to the numerical simulation results, an optimal adjustment is performed to obtain a guide plate position scheme with the most uniform air flow distribution and the highest coal powder grinding efficiency, including:

[0036] According to the numerical simulation results, a genetic algorithm is used to optimize and adjust the positions of different guide plates, and a guide plate position scheme with the most uniform air flow distribution and the highest coal powder grinding efficiency is obtained.

[0037] According to the above technical means, the numerical simulation results can be further optimized and adjusted, the optimal control strategy can be obtained, the coal grinding efficiency and the equipment operation stability can be improved, the energy consumption and the equipment wear are reduced, and the service life of the equipment is prolonged.

[0038] In the embodiment of the application, the control system automatically adjusts the position of the guide vane in the coal mill according to the guide vane position scheme, including:

[0039] obtaining the current guide vane position;

[0040] determining the guide vane adjustment scheme according to the guide vane position scheme and the current guide vane position;

[0041] The control system automatically adjusts the position of the guide vane in the coal mill according to the guide vane adjustment scheme.

[0042] According to the above technical means, the position of the guide vane can be automatically adjusted without shutdown operation.

[0043] The second aspect of the application provides a coal mill capacity increasing and efficiency improving device based on numerical simulation coupled flow field optimization, including:

[0044] The controller is configured to:

[0045] constructing a three-dimensional geometric model of the inside of the coal mill;

[0046] obtaining real-time operation data of the coal mill;

[0047] establishing a numerical simulation model according to the real-time operation data of the coal mill and the three-dimensional geometric model of the inside of the coal mill;

[0048] setting the position of the guide vane, performing numerical simulation calculation by using the numerical simulation model, and obtaining numerical simulation results;

[0049] optimizing and adjusting according to the numerical simulation results, and obtaining a guide vane position scheme with the most uniform air flow distribution and the highest coal powder grinding efficiency;

[0050] The control system automatically adjusts the position of the guide vane in the coal mill according to the guide vane position scheme.

[0051] According to the above technical means, the structure and fluid flow characteristics inside the coal mill can be accurately simulated according to the real-time operation data of the coal mill and the three-dimensional geometric model of the inside of the coal mill, and then the position of the guide vane is set for numerical simulation calculation, so that the influence of the guide vane angle and position on the air flow distribution and the coal powder movement trajectory can be accurately analyzed, and the control accuracy and optimization effect are improved.

[0052] The third aspect of the present application provides a machine readable storage medium, which stores instructions for causing a machine to execute the coal mill capacity increasing and efficiency improving method based on numerical simulation coupled flow field optimization.

[0053] By the above technical solution, the present application can achieve the following beneficial effects:

[0054] 1. By numerical simulation technology, the influence of the angle and position of the guide plate on the airflow distribution and the coal powder movement trajectory can be accurately analyzed, improving the accuracy of control and optimization effect;

[0055] 2. The placement position of the guide plate is different from the conventional vertical placement. The addition of a horizontally placed guide plate upwardly inclined between two vertically placed guide plates can realize different wind speeds, and the optimal control strategy can be explored.

[0056] 3. The automatic adjustment function of the guide plate is realized, which can flexibly adjust the angle and position of the guide plate according to real-time operation data, and adapt to the changes of different coal types and operating conditions;

[0057] 4. The coal grinding efficiency and equipment operation stability are improved, the energy consumption and equipment wear are reduced, and the service life of the equipment is prolonged.

[0058] Other features and advantages of the embodiments of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0059] The accompanying drawings are included to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. In the drawings:

[0060] Figure 1 is a flow chart of the coal mill capacity increasing and efficiency improving method based on numerical simulation coupled flow field optimization provided by an embodiment of the present application. DETAILED DESCRIPTION

[0061] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0062] Figure 1 is a flow chart of the coal mill capacity increasing and efficiency improving method based on numerical simulation coupled flow field optimization provided by an embodiment of the present application. As shown in Figure 1 , the coal mill capacity increasing and efficiency improving method based on numerical simulation coupled flow field optimization comprises:

[0063] S1: Constructing a three-dimensional geometric model of the inside of the coal mill.

[0064] In the embodiment of the present application, a three-dimensional geometric model of the inside of the coal mill is constructed, including:

[0065] The internal structure parameters of the coal mill are obtained, and in the embodiment of the present application, the internal structure parameters of the coal mill can be obtained from the design parameters of the coal mill.

[0066] The three-dimensional geometric model of the inside of the coal mill is simulated and constructed according to the structure parameters of the coal mill.

[0067] The three-dimensional geometric model of the inside of the coal mill includes key components such as the grinding disc, the air door and the guide plate, to ensure the accuracy and precision of the model, and the position of the guide plate is adjustable.

[0068] According to the above technical means, the three-dimensional geometric model of the inside of the coal mill is simulated and constructed based on the internal structure parameters of the coal mill, which can accurately reflect the internal structure of the coal mill, so that the subsequent airflow distribution analysis is completely based on the actual coal mill, and the accuracy is improved.

[0069] S2: Obtain real-time running data of the coal mill.

[0070] In the embodiment of the present application, the real-time running data of the coal mill is obtained, including:

[0071] The real-time running data of the coal mill is read from the control system of the coal mill, and the real-time running data of the coal mill includes the rotating speed, the actual air speed of the dynamic and static ring air speed, the coal quantity and the coal quality characteristics, etc.

[0072] According to the above technical means, the real-time running data of the coal mill can be accurately obtained, which is convenient for flexibly determining the angle and position of the guide plate according to the real-time running data, and the angle and position of the guide plate can be adaptively adjusted according to different coal types and different operating conditions.

[0073] S3: Establish a numerical simulation model according to the real-time running data of the coal mill and the three-dimensional geometric model of the inside of the coal mill.

[0074] In the embodiment of the present application, a numerical simulation model is established according to the real-time running data of the coal mill and the three-dimensional geometric model of the inside of the coal mill, including:

[0075] The real-time running data of the coal mill is input into the CFD software;

[0076] The initial conditions and boundary conditions of the CFD calculation are set;

[0077] Based on the three-dimensional geometric model of the inside of the coal mill, a numerical simulation model is established. In the present application, the computational fluid dynamics (CFD) numerical simulation technology is used to simulate and analyze the airflow distribution inside the coal mill, and a numerical simulation model is established.

[0078] According to the above technical means, the numerical simulation model can be constructed according to the real-time operation data of the coal mill, thereby providing a data basis for subsequent numerical simulation calculation.

[0079] S4: setting a position of a guide plate, performing numerical simulation calculation by using the numerical simulation model, and obtaining a numerical simulation result.

[0080] In the embodiment of the present application, the position of the guide plate is set, numerical simulation calculation is performed by using the numerical simulation model, and the numerical simulation result is obtained, including:

[0081] The adjustable range of different guide plates is equally divided according to preset values, and a position array of different guide plates is obtained.

[0082] The position arrays of different guide plates are arranged and combined, and a plurality of groups of guide plate installation position arrays are obtained.

[0083] The numerical simulation model is used to perform fluid dynamics numerical simulation calculation on each group of guide plate installation position arrays, and the numerical simulation result corresponding to each group of guide plate installation positions is obtained. In the embodiment of the present application, after the guide plate installation position array is set, different positions of the guide plate are simulated in the three-dimensional geometric model according to different guide plate installation position arrays, including whether to be installed and the included angle with the damper when installed, such as vertically placing two guide plates, and placing a guide plate obliquely upward in the middle of the two vertically placed guide plates, etc., and numerical simulation calculation is performed according to the guide plate at different positions. By solving the fluid dynamics equation, the distribution of the air flow velocity, pressure and other parameters is obtained to evaluate the uniformity of the air flow distribution and the grinding efficiency of the coal powder.

[0084] According to the above technical means, the numerical simulation calculation can be performed on the positions of different guide plates, and the numerical simulation result corresponding to each group of guide plate installation positions is obtained for air flow distribution and coal powder grinding efficiency analysis.

[0085] In the embodiment of the present application, the guide plate at least includes a first guide plate and a second guide plate vertically arranged on both sides of the damper, and a third guide plate horizontally arranged between the first guide plate and the second guide plate.

[0086] The position array of different guide plates includes removal of the guide plate and different angles of the guide plate inclined into the wind direction. For example, the position array can be: no guide plate is installed, no first guide plate and second guide plate is installed, and the third guide plate is equally divided according to preset values, etc. Assuming that the adjustable range of each guide plate can be equally divided into 10 values, the position data of each guide plate is 10+1=11, and the number of guide plate position data is 11*11*11=1331 groups.

[0087] According to the above technical means, a new obliquely upward horizontal guide plate is added between the two vertically placed guide plates to achieve different wind speeds and explore the optimal control strategy.

[0088] S5: According to the numerical simulation results, the position scheme of the guide plate with the most uniform air flow distribution and the highest coal powder grinding efficiency is obtained through optimization adjustment.

[0089] In the embodiments of the present application, according to the numerical simulation results, the position scheme of the guide plate with the most uniform air flow distribution and the highest coal powder grinding efficiency is obtained through optimization adjustment, including:

[0090] According to the numerical simulation results, the position of the different guide plates is optimized and adjusted by using genetic algorithm, and the position scheme of the guide plate with the most uniform air flow distribution and the highest coal powder grinding efficiency is obtained. The optimization algorithm can be selected and adjusted according to actual needs to improve the optimization effect and calculation efficiency.

[0091] According to the above technical means, further optimization adjustment can be made based on the numerical simulation results to explore the optimal control strategy, improve the grinding efficiency and equipment operation stability, reduce the energy consumption and equipment wear, and prolong the service life of the equipment.

[0092] In one embodiment, the specific optimal placement position of the guide plate can be selected as:

[0093] (1) Two guide plates are placed vertically, the left guide plate is inclined by 15°, the right guide plate is inclined by 30°, and the system resistance increases by about 100 Pa compared with the original structure.

[0094] (2) Two guide plates are placed vertically, the left guide plate is inclined by 15°, the right guide plate is inclined by 30°, and a new guide plate is added between the two guide plates, which is inclined upward at an angle of 10°, and the system resistance increases by about 121 Pa compared with the original structure.

[0095] (3) Two guide plates are placed vertically, the left guide plate is inclined by 15°, the right guide plate is inclined by 15°, and the system resistance increases by about 101 Pa compared with the original structure.

[0096] (4) The left guide plate is inclined by 15°, the right guide plate is inclined by 15°, and a new guide plate is added between the two vertical guide plates, which is inclined upward at an angle of 10°, and the system resistance increases by about 160 Pa compared with the original structure. Then the coal powder grinding efficiency is calculated based on the system resistance.

[0097] S6: The control system automatically adjusts the position of the guide plate in the coal mill according to the guide plate position scheme.

[0098] In the embodiments of the present application, the control system automatically adjusts the position of the guide plate in the coal mill according to the guide plate position scheme, including:

[0099] acquire the current position of the guide vane;

[0100] determine a guide vane adjustment scheme according to the guide vane position scheme and the current position of the guide vane;

[0101] the control system automatically adjusts the position of the guide vane in the coal mill according to the guide vane adjustment scheme.

[0102] According to the above technical means, the position adjustment of the guide vane can be automatically realized without shutdown operation.

[0103] According to the above technical means, according to the real-time running data of the coal mill and the three-dimensional geometric model inside the coal mill, the structure and fluid flow characteristics inside the coal mill can be accurately simulated, and then the position of the guide vane is set for numerical simulation calculation, which can accurately analyze the influence of the angle and position of the guide vane on the airflow distribution and the trajectory of the coal powder movement, and improve the accuracy of control and optimization effect.

[0104] The second aspect of the present application provides a coal mill capacity increasing and efficiency improving device based on numerical simulation coupled flow field optimization, which comprises:

[0105] a controller configured to:

[0106] construct a three-dimensional geometric model inside the coal mill;

[0107] acquire real-time running data of the coal mill;

[0108] establish a numerical simulation model according to the real-time running data of the coal mill and the three-dimensional geometric model inside the coal mill;

[0109] set the position of the guide vane, use the numerical simulation model for numerical simulation calculation, and obtain the numerical simulation result;

[0110] optimally adjust according to the numerical simulation result, and obtain the guide vane position scheme with the most uniform airflow distribution and the highest coal powder grinding efficiency;

[0111] the control system automatically adjusts the position of the guide vane in the coal mill according to the guide vane position scheme.

[0112] According to the above technical means, according to the real-time running data of the coal mill and the three-dimensional geometric model inside the coal mill, the structure and fluid flow characteristics inside the coal mill can be accurately simulated, and then the position of the guide vane is set for numerical simulation calculation, which can accurately analyze the influence of the angle and position of the guide vane on the airflow distribution and the trajectory of the coal powder movement, and improve the accuracy of control and optimization effect.

[0113] The third aspect of the present application provides a machine readable storage medium, which stores instructions for causing a machine to execute the coal mill capacity-increasing and efficiency-improving method based on coupling flow field optimization of numerical simulation.

[0114] Through the above technical solution, the present application can achieve the following beneficial effects:

[0115] 1. Through the numerical simulation technology, the influence of the angle and position of the flow guide plate on the air flow distribution and the coal powder movement trajectory can be accurately analyzed, and the control accuracy and optimization effect are improved.

[0116] 2. The placement position of the flow guide plate is different from the conventional vertical placement. The newly added inclined upward transverse flow guide plate between the two vertically placed flow guide plates can realize different wind speeds, and the optimal control strategy can be explored.

[0117] 3. The automatic adjustment function of the flow guide plate is realized, and the angle and position of the flow guide plate can be flexibly adjusted according to real-time operation data to adapt to the changes of different coal types and operating conditions.

[0118] 4. The grinding efficiency and equipment operation stability are improved, the energy consumption and equipment wear are reduced, and the service life of the equipment is prolonged.

[0119] Those skilled in the art can understand that all or part of the steps in the method for implementing the above embodiments can be completed by programs instructing related hardware, the programs are stored in a storage medium, and the programs include a plurality of instructions for causing a single-chip microcomputer, a chip or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0120] The optional embodiments of the present application are described in detail above in combination with the drawings, but the embodiments of the present application are not limited to the specific details in the above embodiments. Within the technical concept range of the embodiments of the present application, the technical solutions of the embodiments of the present application can be subjected to various simple modifications, and these simple modifications all belong to the protection range of the embodiments of the present application. In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present application will not further describe various possible combination manners.

[0121] Besides, the various embodiments of the present application can be combined arbitrarily, as long as it does not violate the idea of the embodiments of the present application, which should be considered as the disclosed content of the embodiments of the present application.

Claims

1. A method for increasing capacity and efficiency of a coal mill based on numerical simulation coupled with flow field optimization, characterized in that, The coal mill capacity increasing and efficiency improving method based on numerical simulation coupled flow field optimization comprises: a three-dimensional geometric model of the inside of the coal mill is constructed; real-time operation data of the coal mill is obtained, which comprises rotational speed, actual wind speed of the dynamic and static ring, coal quantity and coal quality characteristics; a numerical simulation model is established according to the real-time operation data of the coal mill and the three-dimensional geometric model of the inside of the coal mill; a guide vane position is set, numerical simulation calculation is performed by using the numerical simulation model, and numerical simulation results are obtained, which comprise: different guide vane position arrays are obtained by equally spacing dividing the adjustable range of different guide vanes according to preset values; a plurality of guide vane installation position arrays are obtained by arranging and combining the different guide vane position arrays; fluid dynamics numerical simulation calculation is performed on each group of guide vane installation position arrays by using the numerical simulation model, and numerical simulation results corresponding to each group of guide vane installation position arrays are obtained, wherein the guide vanes at least comprise first and second guide vanes vertically arranged on both sides of the air door and a third guide vane horizontally arranged between the first and second guide vanes; optimization adjustment is performed according to the numerical simulation results, and a guide vane position scheme with the most uniform air flow distribution and the highest coal powder grinding efficiency is obtained, which comprises: optimization adjustment is performed on the positions of different guide vanes by using a genetic algorithm according to the numerical simulation results, and a guide vane position scheme with the most uniform air flow distribution and the highest coal powder grinding efficiency is obtained; a control system automatically adjusts the guide vane positions in the coal mill according to the guide vane position scheme.

2. The method for capacity enhancement and efficiency improvement of coal pulverizer based on coupling flow field optimization of numerical simulation according to claim 1, characterized in that, The three-dimensional geometric model of the inside of the coal mill comprises: internal structure parameters of the coal mill are obtained; the three-dimensional geometric model of the inside of the coal mill is simulated and constructed according to the structure parameters of the coal mill; the three-dimensional geometric model of the inside of the coal mill comprises a grinding disc, an air door and guide vanes, and the positions of the guide vanes are adjustable.

3. The method for capacity enhancement and efficiency improvement of coal pulverizer based on coupling flow field optimization of numerical simulation according to claim 1, characterized in that, The real-time operation data of the coal mill is obtained, which comprises: the real-time operation data of the coal mill is read from a control system of the coal mill.

4. The method for capacity enhancement and efficiency improvement of coal pulverizer based on coupling flow field optimization of numerical simulation according to claim 1, characterized in that, The numerical simulation model is established according to the real-time operation data of the coal mill and the three-dimensional geometric model of the inside of the coal mill, which comprises: the real-time operation data of the coal mill is input into a CFD software; initial conditions and boundary conditions for CFD calculation are set; the numerical simulation model is established based on the three-dimensional geometric model of the inside of the coal mill.

5. The method for capacity enhancement and efficiency improvement of coal pulverizer based on coupling flow field optimization of numerical simulation according to claim 1, characterized in that, The position arrays of different guide vanes all comprise guide vane removal and guide vane deflection in different angles in the air inlet direction.

6. The method for capacity enhancement and efficiency improvement of coal pulverizer based on coupling flow field optimization of numerical simulation according to claim 1, characterized in that, The control system automatically adjusts the guide vane positions in the coal mill according to the guide vane position scheme, which comprises: a current guide vane position is obtained; a guide vane adjustment scheme is determined according to the guide vane position scheme and the current guide vane position; the control system automatically adjusts the guide vane positions in the coal mill according to the guide vane adjustment scheme.

7. A coal mill capacity increasing and efficiency improving device based on numerical simulation coupled flow field optimization, characterized in that, The coal mill capacity increasing and efficiency improving device based on numerical simulation coupled flow field optimization comprises: a controller configured to: construct a three-dimensional geometric model of the inside of the coal mill; obtain real-time operation data of the coal mill, which comprises rotational speed, actual wind speed of the dynamic and static ring, coal quantity and coal quality characteristics; establish a numerical simulation model according to the real-time operation data of the coal mill and the three-dimensional geometric model of the inside of the coal mill; set a guide vane position, perform numerical simulation calculation by using the numerical simulation model, and obtain numerical simulation results, which comprise: The adjustable range of different guide vanes is equally spaced according to preset values to obtain a position array of different guide vanes; The position arrays of different guide vanes are arranged and combined to obtain a plurality of groups of guide vane installation position arrays; Numerical simulation model is used to perform fluid dynamics numerical simulation calculation on each group of guide vane installation position arrays to obtain numerical simulation results corresponding to each group of guide vane installation positions, wherein the guide vanes at least include first and second guide vanes vertically arranged on both sides of the air door and a third guide vane horizontally arranged between the first and second guide vanes; According to the numerical simulation results, a guide vane position scheme with the most uniform airflow distribution and the highest coal powder grinding efficiency is obtained by optimizing and adjusting the positions of different guide vanes using a genetic algorithm, including: according to the numerical simulation results, a guide vane position scheme with the most uniform airflow distribution and the highest coal powder grinding efficiency is obtained by optimizing and adjusting the positions of different guide vanes using a genetic algorithm; The control system automatically adjusts the positions of the guide vanes in the coal mill according to the guide vane position scheme. 8.A machine readable storage medium, having stored thereon instructions for causing a machine to perform the method for capacity expansion and efficiency improvement of a coal mill based on numerical simulation coupled flow field optimization according to any one of claims 1-6.

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