Pulverized coal injection control system of rotary kiln

Abstract

The invention relates to the field of pulverized coal injection control, and discloses a rotary kiln pulverized coal injection control system which comprises a flame image acquisition module, a data acquisition module, a feature extraction module, a data analysis module, a control analysis module, an injection control execution module, an effect evaluation module and a result feedback module. Data feature extraction is carried out on collected flame images through an image processing technology, feature extraction is carried out on collected information data related to pulverized coal injection, and then the combustion condition of pulverized coal, the atmosphere in a kiln and the stability of the pulverized coal injection state are analyzed and monitored; whether the pulverized coal injection parameters are controlled and adjusted or not is judged by calculating the control deviation coefficient, and whether the pulverized coal injection control effect reaches the expected target or not is evaluated by monitoring and analyzing the control adjustment result. And a pulverized coal injection control adjustment report is automatically generated according to the pulverized coal injection control adjustment and effect evaluation result and is fed back to management personnel.

Description

Technical Field

[0001] The invention relates to the technical field of coal powder injection control, and more specifically to a rotary kiln coal powder injection control system. Background Art

[0002] During the operation of the rotary kiln, pulverized coal needs to be sprayed into the kiln as fuel to provide heat. However, the pulverized coal injection process needs to be precisely controlled, otherwise it will affect the operating efficiency and product quality of the rotary kiln. Therefore, in order to achieve precise control of pulverized coal injection in the rotary kiln, an advanced control system is required. This control system usually includes sensors, controllers, and actuators, which can monitor the pulverized coal injection volume, injection speed, and injection pressure parameters in real time, and perform precise control based on these parameters to ensure the stable operation of the rotary kiln and the stability of product quality. However, the above process still has the following disadvantages: First, the existing rotary kiln coal powder injection control system cannot comprehensively evaluate the state of the rotary kiln coal powder injection by monitoring and collecting various parameters, and lacks the evaluation and monitoring of the effect of coal powder injection control adjustment to keep the state of the rotary kiln coal powder injection in a stable state, resulting in low reliability and control accuracy; Secondly, the existing rotary kiln coal powder injection control system usually lacks intelligent control functions and cannot be adaptively adjusted according to factors such as the operating status of the rotary kiln and the quality of the coal powder, resulting in unsatisfactory coal powder injection effects, affecting combustion efficiency and product quality. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a rotary kiln coal powder injection control system to solve the problems existing in the above-mentioned background technology.

[0004] The present invention provides the following technical solution: a rotary kiln coal powder injection control system, comprising: Flame image acquisition module: by installing a camera at the fire viewing hole position, the flame image is collected in real time, and the flame image information feature data is extracted from the collected flame image through image processing technology, including the flame shape change rate, flame center of mass position change, flame color change rate and flame brightness standard deviation, and the flame image information feature data is transmitted to the data analysis module; Data acquisition module: monitors and collects coal powder injection related information data in real time through sensors, including coal powder injection amount, kiln temperature, pipeline pressure and nitrogen flow rate, and transmits the collected coal powder injection related information data to the feature extraction module; Feature extraction module: by extracting features from the collected data related to pulverized coal injection, relevant feature parameters affecting the state of pulverized coal injection are extracted from the data related to pulverized coal injection, including the average value of pulverized coal injection rate, the average value of temperature change in the kiln, the average value of pressure change in the pipeline, and the average value of nitrogen flow rate change, and the pulverized coal injection related information data after feature extraction is transmitted to the data analysis module; Data analysis module: by analyzing the characteristic data of flame image information, the combustion state evaluation index is obtained, the combustion state of pulverized coal and the stability of the atmosphere in the kiln are monitored; by analyzing the pulverized coal injection related information data after feature extraction, the injection state evaluation index is obtained, the stability of the pulverized coal injection state is monitored, and the results of data analysis are transmitted to the control analysis module; Control analysis module: further analyzes the combustion stability evaluation index and the injection state stability evaluation index, and calculates the control deviation coefficient. The control deviation coefficient is used to determine whether to control and adjust the pulverized coal injection parameters; Injection control execution module: automatically executes the control adjustment operation of coal powder injection parameters based on the results of control analysis, and transmits the control adjustment results to the effect evaluation module in real time; Effect evaluation module: by monitoring and analyzing the control adjustment results, the control effect evaluation coefficient is obtained, and the control effect evaluation coefficient is used to evaluate whether the control effect of pulverized coal injection reaches the expected target; Result feedback module: automatically generates a pulverized coal injection control adjustment report based on the pulverized coal injection control adjustment and effect evaluation results to provide feedback to management personnel.

[0005] Preferably, the flame image acquisition module selects a high temperature resistant and smoke resistant camera, installs the camera at the fire viewing hole position of the boiler and the burner, makes the camera lens face the flame, and adjusts the camera parameters, including exposure time and focal length, until a clear flame image is obtained to acquire the flame image, and then preprocesses the flame image through image processing technology, the flame image preprocessing process includes grayscale conversion, noise removal, contrast enhancement and image segmentation, and extracts and calculates the flame shape change rate, flame centroid position change, flame color change rate and flame brightness standard deviation from the preprocessed flame image; The calculation formula of the flame shape change rate is: , Indicates the area of ​​the flame in the current frame, Indicates the area of ​​the flame in the previous frame; The calculation formula for the change in the flame center of mass position is: , Indicates the coordinates of the flame center of mass in the current frame, Indicates the coordinates of the center of mass of the flame in the previous frame; The calculation formula of the flame color change rate is: , Represents the color component value of the current frame, Represents the color component value of the previous frame; The calculation formula for the flame brightness standard deviation is: , Indicates that the image is at position The brightness value, represents the average brightness of the flame image, M represents the number of rows in the image, and N represents the number of columns in the image.

[0006] Preferably, the specific collection method of the data collection module is: The temperature value in the kiln can be monitored and collected in real time by installing temperature sensors at the kiln head, kiln tail and decomposition furnace outlet of the rotary kiln; The pulverized coal flow sensor is installed on the pulverized coal conveying pipeline to measure and collect the pulverized coal injection volume in real time; By installing the pressure sensor at the outlet of the pulverized coal conveying pipeline and the injection tank, it is used to monitor and collect the pressure value in the pipeline in real time; The nitrogen flow sensor is installed on the nitrogen delivery pipeline to measure and collect the nitrogen flow value in real time.

[0007] Preferably, the feature extraction module performs feature change analysis by recording the coal pulverized injection related information data collected continuously over a period of time, extracting and calculating the average value of the coal pulverized injection rate, the average value of the temperature change in the kiln, the average value of the pressure change in the pipeline, and the average value of the nitrogen flow rate change; The calculation formula for the average value of the pulverized coal injection rate is: , represents the coal powder injection value collected for the mth time, S represents the cross-sectional area of ​​the spray gun orifice, and n represents the number of collection times; The calculation formula for the average value of the temperature change in the kiln is: , represents the temperature value in the kiln collected for the mth time, Indicates the temperature value in the kiln collected at the m-1th time; The calculation formula for the average value of the pressure change in the pipeline is: , It represents the pressure value in the pipeline collected for the mth time. Indicates the pressure value in the pipeline collected at the m-1th time; The calculation formula for the average value of the nitrogen flow rate change is: , Indicates the nitrogen flow value collected for the mth time, Indicates the nitrogen flow value collected for the m-1th time.

[0008] Preferably, the data analysis module calculates the combustion state evaluation index by analyzing the flame image information feature data extracted from continuous features within a period of time. , represents the flame shape change rate at time t, represents the change of the flame center of mass position at time t, represents the flame color change rate at time t, represents the standard deviation of flame brightness at time t, Indicates the maximum value of the flame shape change rate within a period of time. Indicates the maximum value of the change in the center of mass position of the flame within a period of time. Indicates the maximum value of the flame color change rate within a period of time. represents the maximum value of the standard deviation of flame brightness within a period of time, K represents the total time, is the weight coefficient; The calculation formula for the injection state evaluation index is calculated by analyzing the continuous coal powder injection related information data over a period of time: , represents the average value of pulverized coal injection rate, Indicates the average value of temperature change in the kiln. Indicates the average value of the pressure change in the pipeline. Indicates the average value of nitrogen flow rate change.

[0009] Preferably, the control analysis module realizes precise adjustment of the coal powder injection amount by controlling the deviation coefficient, and its calculation formula is: , W represents the combustion state evaluation index, w represents the preset combustion state threshold, Z represents the injection state evaluation index, z represents the preset injection state threshold, is the weight coefficient; By dividing the control deviation coefficient X by the control deviation threshold For comparison, if the control deviation coefficient X Control Deviation Threshold , it indicates that the pulverized coal injection deviation state is stable within the set target value range, and there is no need to adjust the pulverized coal injection parameters. If the control deviation coefficient X Control Deviation Threshold , it indicates that the pulverized coal injection deviation state has a large degree of deviation, and the pulverized coal injection parameters need to be adjusted, and the control execution instructions are transmitted to the injection control execution module.

[0010] Preferably, the control adjustment operation process of the injection control execution module includes: adjusting the coal powder injection amount, changing the nitrogen flow rate and adjusting the injection pressure. The precise control of the coal powder injection is achieved by executing the control adjustment operation, and the changes of the parameters in the control process are monitored in real time.

[0011] Preferably, the effect evaluation module performs real-time analysis based on the received control adjustment results, and calculates the control effect evaluation coefficient using the following formula: , if the control effect evaluation coefficient 0, the control effect of pulverized coal injection reaches the expected target. If the control effect evaluation coefficient If the control effect of pulverized coal injection is not fully achieved, the pulverized coal injection parameters need to be fine-tuned continuously, and the control effect evaluation coefficient value should be monitored in real time until it is maintained at Within the range, stop adjusting the pulverized coal injection parameters.

[0012] Technical effects and advantages of the present invention: The present invention uses image processing technology to extract data features from collected flame images, uses sensors to monitor and collect coal powder injection related information data in real time, and extracts features from the collected coal powder injection related information data, analyzes the flame image information feature data and the coal powder injection related information data after feature extraction, monitors the combustion of coal powder, the atmosphere in the kiln, and the stability of the coal powder injection state, and determines whether to control and adjust the coal powder injection parameters by calculating the control deviation coefficient. According to the result of control analysis, the control and adjustment operation of the coal powder injection parameters is automatically executed, and the control and adjustment results are monitored and Through analysis, the control effect evaluation coefficient is obtained, and the control effect evaluation coefficient is used to evaluate whether the control effect of pulverized coal injection reaches the expected goal. Then, according to the pulverized coal injection control adjustment and effect evaluation results, a pulverized coal injection control adjustment report is automatically generated to provide feedback to the management personnel. This is beneficial to monitor and collect parameters from multiple aspects to comprehensively evaluate the status of pulverized coal injection in the rotary kiln, and to evaluate and monitor the effect of pulverized coal injection control adjustment, thereby improving the reliability and control accuracy of pulverized coal injection control. At the same time, through intelligent control execution operations, adaptive adjustment of factors such as the operating status of the rotary kiln and pulverized coal quality is achieved, thereby improving the pulverized coal injection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the overall structural block diagram of the present invention.

[0014] Figure 2 The figure is a flow chart of the method steps of the present invention. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The rotary kiln pulverized coal injection control system involved in the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0016] The present invention provides a rotary kiln coal powder injection control system, comprising: Flame image acquisition module: By installing a camera at the fire viewing hole, flame images are collected in real time. The flame image information feature data is extracted from the collected flame images through image processing technology, including the flame shape change rate, flame center of mass position change, flame color change rate and flame brightness standard deviation, and the flame image information feature data is transmitted to the data analysis module.

[0017] In this embodiment, the flame image acquisition module selects a high temperature resistant and smoke resistant camera, installs the camera at the fire viewing hole position of the boiler and the burner, makes the camera lens face the flame, and adjusts the camera parameters, including exposure time and focal length, until a clear flame image is obtained to acquire the flame image, and then pre-processes the flame image through image processing technology. The flame image pre-processing process includes grayscale conversion, noise removal, contrast enhancement and image segmentation, and extracts and calculates the flame shape change rate, flame centroid position change, flame color change rate and flame brightness standard deviation from the pre-processed flame image; The calculation formula of the flame shape change rate is: , Indicates the area of ​​the flame in the current frame, Indicates the area of ​​the flame in the previous frame; The calculation formula for the change in the flame center of mass position is: , Indicates the coordinates of the flame center of mass in the current frame, Indicates the coordinates of the center of mass of the flame in the previous frame; The calculation formula of the flame color change rate is: , Represents the color component value of the current frame, Represents the color component value of the previous frame; The calculation formula for the flame brightness standard deviation is: , Indicates that the image is at position The brightness value, represents the average brightness of the flame image, M represents the number of rows in the image, and N represents the number of columns in the image.

[0018] Data acquisition module: monitors and collects coal powder injection related information data in real time through sensors, including coal powder injection amount, kiln temperature, pipeline pressure and nitrogen flow rate, and transmits the collected coal powder injection related information data to the feature extraction module.

[0019] In this embodiment, the specific collection method of the data collection module is: The temperature value in the kiln can be monitored and collected in real time by installing temperature sensors at the kiln head, kiln tail and decomposition furnace outlet of the rotary kiln; The pulverized coal flow sensor is installed on the pulverized coal conveying pipeline to measure and collect the pulverized coal injection volume in real time; By installing the pressure sensor at the outlet of the pulverized coal conveying pipeline and the injection tank, it is used to monitor and collect the pressure value in the pipeline in real time; The nitrogen flow sensor is installed on the nitrogen delivery pipeline to measure and collect the nitrogen flow value in real time.

[0020] Feature extraction module: By performing feature extraction on the collected data related to coal powder injection, relevant characteristic parameters affecting the state of coal powder injection are extracted from the data related to coal powder injection, including the average value of coal powder injection rate, the average value of temperature change in the kiln, the average value of pressure change in the pipeline, and the average value of nitrogen flow change, and the data related to coal powder injection after feature extraction is transmitted to the data analysis module.

[0021] In this embodiment, the feature extraction module performs feature change analysis by recording the coal pulverized injection related information data collected continuously over a period of time, extracting and calculating the average value of the coal pulverized injection rate, the average value of the temperature change in the kiln, the average value of the pressure change in the pipeline, and the average value of the nitrogen flow rate change; The calculation formula for the average value of the pulverized coal injection rate is: , represents the coal powder injection value collected for the mth time, S represents the cross-sectional area of ​​the spray gun orifice, and n represents the number of collection times; The calculation formula for the average value of the temperature change in the kiln is: , represents the temperature value in the kiln collected for the mth time, Indicates the temperature value in the kiln collected at the m-1th time; The calculation formula for the average value of the pressure change in the pipeline is: , It represents the pressure value in the pipeline collected for the mth time. Indicates the pressure value in the pipeline collected at the m-1th time; The calculation formula for the average value of the nitrogen flow rate change is: , Indicates the nitrogen flow value collected for the mth time, Indicates the nitrogen flow value collected for the m-1th time.

[0022] Data analysis module: by analyzing the characteristic data of flame image information, the combustion state evaluation index is obtained to monitor the combustion condition of coal powder and the stability of the atmosphere in the kiln; by analyzing the coal powder injection related information data after feature extraction, the injection state evaluation index is obtained to monitor the stability of coal powder injection state, and the results of data analysis are transmitted to the control analysis module.

[0023] In this embodiment, the data analysis module calculates the combustion state evaluation index by analyzing the flame image information feature data extracted from continuous features within a period of time. , represents the flame shape change rate at time t, represents the change of the flame center of mass position at time t, represents the flame color change rate at time t, represents the standard deviation of flame brightness at time t, Indicates the maximum value of the flame shape change rate within a period of time. Indicates the maximum value of the change in the center of mass position of the flame within a period of time. Indicates the maximum value of the flame color change rate within a period of time. represents the maximum value of the standard deviation of flame brightness within a period of time, K represents the total time, is the weight coefficient; The calculation formula for the injection state evaluation index is calculated by analyzing the continuous coal powder injection related information data over a period of time: , represents the average value of pulverized coal injection rate, Indicates the average value of temperature change in the kiln. Indicates the average value of the pressure change in the pipeline. Indicates the average value of nitrogen flow rate change.

[0024] Control analysis module: further analysis is performed through the combustion stability evaluation index and the injection state stability evaluation index, and the control deviation coefficient is calculated. The control deviation coefficient is used to determine whether to control and adjust the pulverized coal injection parameters.

[0025] In this embodiment, the control analysis module realizes accurate adjustment of the coal powder injection amount by controlling the deviation coefficient, and its calculation formula is: , W represents the combustion state evaluation index, w represents the preset combustion state threshold, Z represents the injection state evaluation index, z represents the preset injection state threshold, is the weight coefficient; By dividing the control deviation coefficient X by the control deviation threshold For comparison, if the control deviation coefficient X Control Deviation Threshold , it indicates that the pulverized coal injection deviation state is stable within the set target value range, and there is no need to adjust the pulverized coal injection parameters. If the control deviation coefficient X Control Deviation Threshold , it indicates that the pulverized coal injection deviation state has a large degree of deviation, and the pulverized coal injection parameters need to be adjusted, and the control execution instructions are transmitted to the injection control execution module.

[0026] Injection control execution module: automatically executes the control adjustment operation of coal powder injection parameters through the results of control analysis, and transmits the control adjustment results to the effect evaluation module in real time.

[0027] In this embodiment, the control adjustment operation process of the injection control execution module includes: adjusting the coal powder injection amount, changing the nitrogen flow rate and adjusting the injection pressure. By executing the control adjustment operation, precise control of coal powder injection is achieved, and the changes in parameters during the control process are monitored in real time.

[0028] Effect evaluation module: By monitoring and analyzing the control adjustment results, the control effect evaluation coefficient is obtained, and the control effect evaluation coefficient is used to evaluate whether the control effect of pulverized coal injection reaches the expected target. In this embodiment, the effect evaluation module performs real-time analysis based on the received control adjustment results, and calculates the control effect evaluation coefficient using the following formula: , if the control effect evaluation coefficient 0, the control effect of pulverized coal injection reaches the expected target. If the control effect evaluation coefficient If the control effect of pulverized coal injection is not fully achieved, the pulverized coal injection parameters need to be fine-tuned continuously, and the control effect evaluation coefficient value should be monitored in real time until it is maintained at Within the range, stop adjusting the pulverized coal injection parameters.

[0029] Result feedback module: automatically generates a pulverized coal injection control adjustment report based on the pulverized coal injection control adjustment and effect evaluation results to provide feedback to management personnel.

[0030] See also Figure 2 As shown, the rotary kiln coal powder injection control system includes the following steps: S1: A camera is installed at the fire viewing hole to collect flame images in real time. The flame image information feature data is extracted from the collected flame images through image processing technology, including the flame shape change rate, flame centroid position change, flame color change rate and flame brightness standard deviation; S2: Real-time monitoring and collection of coal powder injection related information data through sensors, including coal powder injection amount, kiln temperature, pipeline pressure and nitrogen flow rate; S3: by performing feature extraction on the collected data related to pulverized coal injection, relevant feature parameters affecting the state of pulverized coal injection are extracted from the data related to pulverized coal injection, including the average value of pulverized coal injection rate, the average value of temperature change in the kiln, the average value of pressure change in the pipeline, and the average value of nitrogen flow rate change; S4: by analyzing the characteristic data of the flame image information, a combustion state evaluation index is obtained to monitor the combustion of the pulverized coal and the stability of the atmosphere in the kiln; by analyzing the pulverized coal injection related information data after feature extraction, an injection state evaluation index is obtained to monitor the stability of the pulverized coal injection state; S5: further analyze the combustion stability evaluation index and the injection state stability evaluation index, and calculate the control deviation coefficient, and judge whether to control and adjust the pulverized coal injection parameters according to the control deviation coefficient; S6: Automatically perform the control and adjustment operation of the pulverized coal injection parameters based on the results of the control analysis; S7: by monitoring and analyzing the control adjustment results, a control effect evaluation coefficient is obtained, and the control effect evaluation coefficient is used to evaluate whether the control effect of the pulverized coal injection reaches the expected target; S8: Automatically generate a pulverized coal injection control adjustment report based on the pulverized coal injection control adjustment and effect evaluation results to provide feedback to management personnel.

[0031] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0032] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. Rotary kiln coal powder injection control system, characterized by: include: Flame image acquisition module: by installing a camera at the fire viewing hole position, the flame image is collected in real time, and the flame image information feature data is extracted from the collected flame image through image processing technology, including the flame shape change rate, flame center of mass position change, flame color change rate and flame brightness standard deviation, and the flame image information feature data is transmitted to the data analysis module; Data acquisition module: monitors and collects coal powder injection related information data in real time through sensors, including coal powder injection amount, kiln temperature, pipeline pressure and nitrogen flow rate, and transmits the collected coal powder injection related information data to the feature extraction module; Feature extraction module: by extracting features from the collected data related to pulverized coal injection, relevant feature parameters affecting the state of pulverized coal injection are extracted from the data related to pulverized coal injection, including the average value of pulverized coal injection rate, the average value of temperature change in the kiln, the average value of pressure change in the pipeline, and the average value of nitrogen flow rate change, and the pulverized coal injection related information data after feature extraction is transmitted to the data analysis module; Data analysis module: by analyzing the characteristic data of flame image information, the combustion state evaluation index is obtained, the combustion state of pulverized coal and the stability of the atmosphere in the kiln are monitored; by analyzing the pulverized coal injection related information data after feature extraction, the injection state evaluation index is obtained, the stability of the pulverized coal injection state is monitored, and the results of data analysis are transmitted to the control analysis module; Control analysis module: further analyzes the combustion stability evaluation index and the injection state stability evaluation index, and calculates the control deviation coefficient. The control deviation coefficient is used to determine whether to control and adjust the pulverized coal injection parameters; Injection control execution module: automatically executes the control adjustment operation of coal powder injection parameters based on the results of control analysis, and transmits the control adjustment results to the effect evaluation module in real time; Effect evaluation module: by monitoring and analyzing the control adjustment results, the control effect evaluation coefficient is obtained, and the control effect evaluation coefficient is used to evaluate whether the control effect of pulverized coal injection reaches the expected target; Result feedback module: automatically generates a pulverized coal injection control adjustment report based on the pulverized coal injection control adjustment and effect evaluation results to provide feedback to management personnel.

2. The rotary kiln coal powder injection control system according to claim 1 is characterized in that: The flame image acquisition module selects a high temperature resistant and smoke resistant camera, installs the camera at the fire viewing hole position of the boiler and the burner, makes the camera lens face the flame, and adjusts the camera parameters, including exposure time and focal length, until a clear flame image is obtained to acquire the flame image, and then pre-processes the flame image through image processing technology. The flame image pre-processing process includes grayscale conversion, noise removal, contrast enhancement and image segmentation, and extracts and calculates the flame shape change rate, flame centroid position change, flame color change rate and flame brightness standard deviation from the pre-processed flame image; The calculation formula of the flame shape change rate is: , Indicates the area of ​​the flame in the current frame, Indicates the area of ​​the flame in the previous frame; The calculation formula for the change in the flame center of mass position is: , Indicates the coordinates of the center of mass of the flame in the current frame, Indicates the coordinates of the center of mass of the flame in the previous frame; The calculation formula of the flame color change rate is: , Represents the color component value of the current frame, Represents the color component value of the previous frame; The calculation formula for the flame brightness standard deviation is: , Indicates that the image is at position The brightness value, represents the average brightness of the flame image, M represents the number of rows in the image, and N represents the number of columns in the image.

3. The rotary kiln coal powder injection control system according to claim 1 is characterized in that: The specific collection method of the data collection module is: The temperature value in the kiln can be monitored and collected in real time by installing temperature sensors at the kiln head, kiln tail and decomposition furnace outlet of the rotary kiln; The pulverized coal flow sensor is installed on the pulverized coal conveying pipeline to measure and collect the pulverized coal injection volume in real time; By installing the pressure sensor at the outlet of the pulverized coal conveying pipeline and the injection tank, it is used to monitor and collect the pressure value in the pipeline in real time; The nitrogen flow sensor is installed on the nitrogen delivery pipeline to measure and collect the nitrogen flow value in real time.

4. The rotary kiln coal powder injection control system according to claim 1, characterized in that: The feature extraction module performs feature change analysis by recording the coal pulverized injection related information data collected continuously over a period of time, extracting and calculating the average value of the coal pulverized injection rate, the average value of the temperature change in the kiln, the average value of the pressure change in the pipeline, and the average value of the nitrogen flow rate change; The calculation formula for the average value of the pulverized coal injection rate is: , represents the coal powder injection value collected for the mth time, S represents the cross-sectional area of ​​the spray gun mouth, and n represents the number of collection times; The calculation formula for the average value of the temperature change in the kiln is: , represents the temperature value in the kiln collected for the mth time, Indicates the temperature value in the kiln collected at the m-1th time; The calculation formula for the average value of the pressure change in the pipeline is: , It represents the pressure value in the pipeline collected for the mth time. Indicates the pressure value in the pipeline collected at the m-1th time; The calculation formula for the average value of the nitrogen flow rate change is: , Indicates the nitrogen flow value collected for the mth time, Indicates the nitrogen flow value collected for the m-1th time.

5. The rotary kiln coal powder injection control system according to claim 1, characterized in that: The data analysis module calculates the combustion state evaluation index by analyzing the flame image information feature data extracted from continuous features within a period of time. The calculation formula is: , represents the flame shape change rate at time t, represents the change of the flame center of mass position at time t, represents the flame color change rate at time t, represents the standard deviation of flame brightness at time t, Indicates the maximum value of the flame shape change rate within a period of time. Indicates the maximum value of the change in the center of mass position of the flame within a period of time. Indicates the maximum value of the flame color change rate within a period of time. represents the maximum value of the standard deviation of flame brightness within a period of time, K represents the total time, is the weight coefficient; The calculation formula for calculating the injection state evaluation index by analyzing the continuous coal powder injection related information data over a period of time is: , represents the average value of pulverized coal injection rate, Indicates the average value of temperature change in the kiln. Indicates the average value of the pressure change in the pipeline. Indicates the average value of nitrogen flow rate change.

6. The rotary kiln coal powder injection control system according to claim 1, characterized in that: The control analysis module achieves precise adjustment of the coal powder injection amount by controlling the deviation coefficient, and its calculation formula is: , W represents the combustion state evaluation index, w represents the preset combustion state threshold, Z represents the injection state evaluation index, z represents the preset injection state threshold, is the weight coefficient; By dividing the control deviation coefficient X by the control deviation threshold For comparison, if the control deviation coefficient X Control Deviation Threshold , it indicates that the pulverized coal injection deviation state is stable within the set target value range, and there is no need to adjust the pulverized coal injection parameters. If the control deviation coefficient X Control Deviation Threshold , it indicates that the pulverized coal injection deviation state has a large degree of deviation, and the pulverized coal injection parameters need to be adjusted, and the control execution instructions are transmitted to the injection control execution module.

7. The rotary kiln coal powder injection control system according to claim 1, characterized in that: The control adjustment operation process of the injection control execution module includes: adjusting the coal powder injection amount, changing the nitrogen flow rate and adjusting the injection pressure. By executing the control adjustment operation, precise control of coal powder injection is achieved, and changes in parameters during the control process are monitored in real time.

8. The rotary kiln coal powder injection control system according to claim 1, characterized in that: The effect evaluation module performs real-time analysis based on the received control adjustment results and calculates the control effect evaluation coefficient using the following formula: , if the control effect evaluation coefficient 0, the control effect of pulverized coal injection reaches the expected target. If the control effect evaluation coefficient If the control effect of pulverized coal injection is not fully achieved, the pulverized coal injection parameters need to be fine-tuned continuously, and the control effect evaluation coefficient value should be monitored in real time until it is maintained at Within the range, stop adjusting the pulverized coal injection parameters.

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