Waste heat boiler circulating pump cooperative control system based on multi-working-condition variable frequency adjustment

Abstract

The invention belongs to the technical field of waste heat boiler circulating pump management and control, and particularly relates to a waste heat boiler circulating pump cooperative control system based on multi-working-condition frequency conversion regulation, which comprises a working condition dynamic clustering recognition module, a cooperative decision control module, a working condition maintenance evaluation module, a health degree hindering output module and a remote supervision center, the operating condition of the waste heat boiler circulating pump is accurately judged through the working condition dynamic clustering recognition module, the collaborative decision control module generates a targeted control instruction according to the unstable working condition type so as to reasonably adjust the waste heat boiler circulating pump, and safe and stable operation of the waste heat boiler circulating pump can be guaranteed. The working condition maintenance evaluation module comprehensively evaluates the working condition maintenance performance through multi-dimensional indexes, operation fluctuation accumulation is avoided, the health degree hinders the output module from adopting two-dimensional evaluation logic, early warning can be triggered in advance, maintenance is involved, the equipment sudden failure and replacement cost is reduced, and full-process guarantee is provided for operation of the waste heat boiler circulating pump.

Description

Technical Field

[0001] This invention relates to the field of waste heat boiler circulating pump control technology, specifically a waste heat boiler circulating pump collaborative control system based on multi-condition variable frequency regulation. Background Technology

[0002] In industrial waste heat utilization systems, the waste heat boiler circulating pump is the core equipment for maintaining forced circulation of the working fluid. Its operating status directly affects the waste heat recovery efficiency, equipment operation safety, and energy consumption level. With the increasing dynamic fluctuations in industrial production load, waste heat boilers often face complex alternating operating conditions such as high load, low load, and start-up / shutdown transitions. Furthermore, key components such as economizers are prone to low-temperature corrosion risks due to sudden changes in operating conditions, which places stringent requirements on the operating condition adaptability and full-cycle management capabilities of the circulating pump control system.

[0003] In the existing technology, attempts have been made to optimize the operation of circulating pumps through monitoring and adjustment methods. For example, Chinese invention patent with publication number CN108253403A discloses a waste heat boiler system. The invention proposes to detect the temperature of the circulating pump motor by a temperature measuring element, and the waste heat boiler controller will issue a fault alarm based on the temperature signal. This solves the safety risk problem caused by incomplete information collection of the circulating pump in the traditional technology and improves the safety of equipment operation to a certain extent.

[0004] However, the aforementioned invention does not establish a classification and identification system for various typical operating conditions of the waste heat boiler circulation system, making it difficult to accurately capture the essential characteristics of the operating conditions. It is also unable to provide early warning of corrosion risks to the economizer under extreme low-temperature conditions, resulting in delayed corrosion prevention and control. Furthermore, the assessment system for the health and operating condition maintenance of the waste heat boiler circulation pump is incomplete, relying solely on single parameter anomalies to trigger alarms. Moreover, the maintenance and management of the waste heat boiler circulation pump are disconnected from the equipment status, lacking quantitative assessment standards for the quality of maintenance execution. This prevents the system from forming a linkage protection with the equipment health status, thus failing to meet the needs of efficient, stable, and long-term operation of the waste heat boiler circulation pump.

[0005] Therefore, a solution is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a collaborative control system for waste heat boiler circulating pumps based on multi-condition variable frequency regulation, so as to solve the technical defects mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a collaborative control system for waste heat boiler circulating pump based on multi-condition variable frequency regulation, including a condition dynamic clustering identification module, a collaborative decision control module, a condition maintenance assessment module, a health status obstacle output module, and a remote monitoring center.

[0008] The dynamic clustering identification module determines the current operating condition type through dynamic clustering identification analysis and outputs the operating condition type to the remote monitoring center and collaborative decision control module in real time. If the operating condition is not stable, the collaborative decision control module generates corresponding control commands to adjust and control the waste heat boiler circulating pump accordingly.

[0009] The operating condition maintenance assessment module is used to evaluate the operating condition maintenance performance. It generates an operating condition maintenance qualified signal or an operating condition maintenance abnormal signal through analysis and sends the operating condition maintenance qualified signal or operating condition maintenance abnormal signal to the remote monitoring center. When generating an operating condition maintenance qualified signal, the health status of the waste heat boiler circulating pump is analyzed by the health status obstacle output module. The analysis generates a health status qualified signal or a health status warning signal and sends the health status qualified signal or health status warning signal to the remote monitoring center.

[0010] Furthermore, the specific analysis process of dynamic clustering identification analysis under working conditions is as follows:

[0011] The system collects core operating parameters in real time to determine the operating status of the waste heat boiler circulating pump. The collected raw data is preprocessed, and the preprocessed parameters are matched with a standard parameter library of several typical operating conditions. The system calculates the membership degree of the current operating condition to the stable operating condition and determines the operating condition with the highest membership degree as the current actual operating condition.

[0012] Furthermore, the preset typical operating conditions include stable operation, high load, low load, and extreme low temperature corrosion risk. If the waste heat boiler circulating pump is in stable operation, no operating condition warning information will be generated; otherwise, an operating condition warning information will be generated and sent to the remote monitoring center and collaborative decision control module.

[0013] Furthermore, the specific analysis process of the operating condition maintenance assessment module includes:

[0014] The system acquires the total duration during which the waste heat boiler circulating pump is not in stable operating condition within the detection period and marks it as an out-of-time value of stable operating condition. This out-of-time value is then compared with a preset stable operating condition out-of-time threshold. If the out-of-time value exceeds the preset stable operating condition out-of-time threshold, an abnormal operating condition signal is generated. If the out-of-time value does not exceed the preset stable operating condition out-of-time threshold, a comprehensive operating condition maintenance assessment is conducted to obtain an operating condition maintenance decision value. This decision value is then compared with a preset operating condition maintenance decision threshold. If the decision value exceeds the preset operating condition maintenance decision threshold, an abnormal operating condition signal is generated. If the decision value does not exceed the preset operating condition maintenance decision threshold, a qualified operating condition signal is generated.

[0015] Furthermore, the specific analysis process for the comprehensive assessment and analysis of operating condition maintenance is as follows:

[0016] All initial moments when the waste heat boiler circulating pump is not in a stable operating condition, and the recorded moments when the waste heat boiler circulating pump recovers to a stable operating condition, are obtained. The time difference between the corresponding recorded moments and the initial moments is calculated to obtain the duration of stable operating condition. The duration of stable operating condition is compared with the preset threshold for the duration of stable operating condition. If the duration of stable operating condition exceeds the preset threshold for the duration of stable operating condition, the operating condition control anomaly symbol WP-1 is assigned.

[0017] The number of times the abnormal control symbol WP-1 is assigned during the detection period is obtained and marked as the abnormal control frequency value. The duration of the stable abnormal condition with the largest value during the detection period is marked as the stable abnormal condition amplitude value. The operating condition maintenance decision value is obtained by weighted summation of the stable operating condition time value, the stable abnormal condition amplitude value and the abnormal control frequency value.

[0018] Furthermore, the specific analysis process for the health-related obstacles to the output module includes:

[0019] The cumulative running time and design life of the waste heat boiler circulating pump are obtained. The ratio of the cumulative running time to the design life is calculated to obtain the initial health value. The initial health value is compared with the preset initial health threshold. If the initial health value exceeds the preset initial health threshold, a health warning signal is generated.

[0020] If the initial health value does not exceed the preset initial health threshold, the system will trace back to the current date for a set number of days, P1, and analyze the health obstacle value within the traceback period. The health obstacle value will be compared with the preset health obstacle threshold. If the health obstacle value exceeds the preset health obstacle threshold, a health warning signal will be generated; if the health obstacle value does not exceed the preset health obstacle threshold, a health pass signal will be generated.

[0021] Furthermore, the specific methods for obtaining the health obstacle value are as follows:

[0022] All faults that occurred in the waste heat boiler circulating pump during the retrospective period were obtained and classified. The occurrence frequency of each type of fault during the retrospective period was marked as the obstruction frequency. A set of preset weight values ​​were set for each type of fault in advance. The obstruction frequency of the corresponding type of fault was multiplied by the corresponding preset weight value to obtain the obstruction coefficient. The obstruction coefficients of all types of faults that occurred in the waste heat boiler circulating pump during the retrospective period were summed to calculate the health obstruction value.

[0023] Furthermore, the health status obstacle output module is connected to the circulating pump management auxiliary analysis module. The health status obstacle output module sends the health status qualified signal to the circulating pump management auxiliary analysis module. When the circulating pump management auxiliary analysis module receives the health status qualified signal, it analyzes the performance of the inspection and maintenance of the waste heat boiler circulating pump within the retrospective period. Through the analysis, it obtains the auxiliary control qualified signal or the auxiliary control abnormal signal, and sends the auxiliary control qualified signal or the auxiliary control abnormal signal to the remote monitoring center.

[0024] Furthermore, the specific analysis process of the circulating pump management auxiliary analysis module includes:

[0025] The system obtains the total number of inspections and maintenance performed on the waste heat boiler circulating pump within the traceback period and marks it as the total inspection and maintenance frequency value. It also marks the number of times the interval between inspections and maintenance performed on the waste heat boiler circulating pump exceeds the corresponding preset interval threshold as the inspection and maintenance delay value. The system compares the total inspection and maintenance frequency value and the inspection and maintenance delay value with the preset total inspection and maintenance frequency threshold and the preset inspection and maintenance delay threshold, respectively. If the total inspection and maintenance frequency value does not exceed the preset total inspection and maintenance frequency threshold or the inspection and maintenance delay value exceeds the preset inspection and maintenance delay threshold, an auxiliary control abnormality signal is generated.

[0026] Furthermore, if the total frequency of inspection and maintenance exceeds the preset total frequency threshold and the delayed inspection and maintenance value does not exceed the preset delayed inspection and maintenance threshold, then all inspection items for the waste heat boiler circulating pump are obtained, the inspection time for the corresponding inspection item is collected during the inspection and maintenance process, and the inspection time is compared with the corresponding preset inspection time threshold. If the inspection time does not exceed the corresponding preset inspection time threshold, then the corresponding inspection item is marked as an abnormal inspection item.

[0027] The number of abnormal inspection items in the corresponding inspection and maintenance process is obtained and marked as abnormal inspection measurement value. The abnormal inspection measurement value is compared with the preset abnormal inspection measurement threshold. If the abnormal inspection measurement value exceeds the preset abnormal inspection measurement threshold, the abnormal inspection symbol XP-1 is assigned to the corresponding inspection and maintenance process.

[0028] The number of times the detection symbol XP-1 is assigned within the traceback period is obtained and the ratio is calculated with the total frequency value of inspection and maintenance to obtain the detection ratio value. The detection ratio value is compared with the preset detection ratio threshold. If the detection ratio value exceeds the preset detection ratio threshold, an auxiliary control abnormal signal is generated; if the detection ratio value does not exceed the preset detection ratio threshold, an auxiliary control qualified signal is generated.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1. In this invention, the operating conditions of the waste heat boiler circulating pump are accurately determined by the dynamic clustering identification module. The collaborative decision control module generates targeted control commands based on the unstable operating condition type to reasonably adjust the waste heat boiler circulating pump. The operating condition maintenance assessment module comprehensively evaluates the operating condition maintenance performance through multi-dimensional indicators. The health obstacle output module adopts a two-dimensional assessment logic to trigger early warning and intervene in maintenance in advance, providing full-process protection for the operation of the waste heat boiler circulating pump.

[0031] 2. In this invention, the circulating pump management auxiliary analysis module can perform multi-dimensional evaluation of maintenance performance, so as to promptly urge maintenance personnel to optimize maintenance processes and improve maintenance quality. In addition, it forms a dual protection of equipment health status and maintenance performance quality with the health obstacle output module, further reducing the operating risk and supervision difficulty of the circulating pump, and significantly improving the management effect of the waste heat boiler circulating pump. Attached Figure Description

[0032] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings;

[0033] Figure 1 This is an overall system block diagram of the present invention;

[0034] Figure 2 This is a flowchart illustrating the overall operation of the present invention. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: As Figure 1-2 As shown, the waste heat boiler circulating pump collaborative control system based on multi-condition variable frequency regulation proposed in this invention includes a condition dynamic clustering identification module, a collaborative decision control module, a condition maintenance assessment module, a health status obstacle output module, and a remote monitoring center.

[0037] The dynamic clustering identification module determines the current operating condition type through dynamic clustering identification and analysis, and outputs the operating condition type to the remote monitoring center and collaborative decision control module in real time. This avoids the problem of misjudgment of operating conditions that is prone to occur in the traditional single parameter judgment method. It can not only generate early warning information in a timely manner and output it synchronously under unstable operating conditions, but also identify operating conditions with extreme low temperature corrosion risk. This provides accurate operating condition basis for subsequent prevention of low temperature corrosion of economizer, ensuring the timeliness and accuracy of operating condition judgment, and laying a reliable data foundation for subsequent regulation and control.

[0038] The specific analysis process for dynamic clustering identification analysis under working conditions is as follows:

[0039] The system collects core operating parameters (such as economizer inlet temperature, economizer outlet temperature, circulating pump outlet pressure, actual motor current, unit load, and pump vibration value) in real time to determine the operating status of the waste heat boiler circulating pump. The collected raw data is preprocessed, and the preprocessed parameters are matched against a pre-defined standard parameter library of several typical operating conditions. The membership degree of the current operating condition to the stable operating condition is calculated, and the operating condition with the highest membership degree is determined as the current actual operating condition. The membership degree calculation formula is as follows:

[0040] ;

[0041] Where μi is the membership degree of the current working condition to the i-th type of typical working condition, and the value ranges from 0 to 1. The closer it is to 1, the higher the matching degree.

[0042] m represents the number of core operating parameters to be collected;

[0043] Xij is the current value of the j-th running parameter;

[0044] Xoj is the standard value of the j-th parameter under the i-th typical working condition;

[0045] ej is the standard deviation of the j-th parameter in the historical stable operating data.

[0046] Furthermore, the preset typical operating conditions include stable operation, high load, low load, and extreme low temperature corrosion risk conditions. If the waste heat boiler circulating pump is in stable operation, no operating condition warning information will be generated; otherwise, an operating condition warning information will be generated and sent to the remote monitoring center and collaborative decision control module so that corresponding adjustment measures can be taken in a timely manner.

[0047] If the system is not in a stable operating condition, the collaborative decision control module generates corresponding control commands to adjust and control the waste heat boiler circulating pump accordingly (such as frequency conversion adjustment). It can formulate appropriate adjustment strategies according to the characteristics of different unstable operating conditions (such as high load, low load, and extreme low temperature corrosion risk conditions), avoid energy waste, equipment overload or low temperature corrosion risk caused by untimely or improper adjustment, and ensure that the waste heat boiler circulating pump can maintain a reasonable operating state under various unstable operating conditions, thus maintaining the stability of the waste heat boiler circulation system.

[0048] The operating condition maintenance assessment module is used to evaluate the operating condition maintenance performance. It generates qualified or abnormal operating condition maintenance signals by analyzing the data and sends these signals to the remote monitoring center. This enables a comprehensive evaluation of the operating condition maintenance performance, overcoming the one-sidedness of judging the operating condition maintenance effect solely by the total duration of abnormalities. It generates abnormal operating condition maintenance signals in a timely and accurate manner, allowing the remote monitoring center to accurately grasp the true status of the circulating pump's operating condition maintenance, identify potential defects in regulation and control, avoid the accumulation of operational fluctuations caused by poor operating condition maintenance, and ensure the long-term stable and efficient operation of the waste heat boiler circulating pump.

[0049] The specific analysis process of the operating condition maintenance assessment module includes:

[0050] The total duration during which the waste heat boiler circulating pump is not in a stable operating condition during the detection period is obtained and marked as a stable operating condition time difference value. The stable operating condition time difference value is compared with the preset stable operating condition time difference threshold. If the stable operating condition time difference value exceeds the preset stable operating condition time difference threshold, it indicates that the stable operating condition maintenance control performance of the waste heat boiler circulating pump is poor during the detection period, and an abnormal operating condition maintenance signal is generated.

[0051] If the stable operating condition time difference value does not exceed the preset stable operating condition time difference threshold, then all initial moments when the waste heat boiler circulating pump is not in a stable operating condition, as well as the recorded moments when the waste heat boiler circulating pump recovers to a stable operating condition, are obtained; the time difference between the corresponding recorded moments and the initial moments is calculated to obtain the duration of stable operating condition time difference, and the duration of stable operating condition time difference is compared with the preset threshold for the duration of stable operating condition time difference.

[0052] If the duration of stable operation exceeds the preset threshold, it indicates that the adjustment and recovery efficiency for the corresponding abnormal operation is slow. In this case, the operating condition control abnormality symbol WP-1 is assigned. The number of times the operating condition control abnormality symbol WP-1 is assigned during the detection period is obtained and marked as the operating condition control abnormality frequency value. The duration of stable operation with the largest value during the detection period is marked as the operating condition stable amplitude value.

[0053] The operating condition maintenance decision value is obtained by weighted summation of the stable operating condition time-varying value, the stable operating condition amplitude value, and the operating condition control frequency value. Specifically, the stable operating condition time-varying value, the stable operating condition amplitude value, and the operating condition control frequency value are each assigned a corresponding preset weight coefficient. The stable operating condition time-varying value, the stable operating condition amplitude value, and the operating condition control frequency value are then multiplied by their respective preset weight coefficients, and the sum of the three product results is marked as the operating condition maintenance decision value.

[0054] It should be noted that the larger the value of the operating condition maintenance decision value, the worse the overall performance of the stable operating condition maintenance control for the waste heat boiler circulating pump during the testing period. The operating condition maintenance decision value is compared with the preset operating condition maintenance decision threshold. If the operating condition maintenance decision value exceeds the preset operating condition maintenance decision threshold, it indicates that the overall performance of the stable operating condition maintenance control for the waste heat boiler circulating pump during the testing period is poor, and an abnormal operating condition maintenance signal is generated. If the operating condition maintenance decision value does not exceed the preset operating condition maintenance decision threshold, it indicates that the overall performance of the stable operating condition maintenance control for the waste heat boiler circulating pump during the testing period is good, and a qualified operating condition maintenance signal is generated.

[0055] When generating a signal indicating that the operating condition is maintained within acceptable limits, the health status of the waste heat boiler circulating pump is analyzed by the health status barrier output module. This analysis generates either a health status acceptable signal or a health status warning signal, which is then sent to the remote monitoring center. This overcomes the limitations of traditional methods that rely solely on equipment runtime to determine health status. It accurately identifies potential health hazards and generates timely health status warning signals, preventing sudden pump failures due to misjudgments. Furthermore, it provides a basis for maintenance personnel to develop targeted maintenance plans, helping to extend the service life of the circulating pump and ensuring its safe and efficient operation. The specific analysis process of the health status barrier output module is as follows:

[0056] The cumulative running time and design life of the waste heat boiler circulating pump are obtained. The ratio of the cumulative running time to the design life is calculated to obtain the initial health value. The initial health value is compared with the preset initial health threshold. If the initial health value exceeds the preset initial health threshold, it indicates that the health status of the waste heat boiler circulating pump is poor, and a health warning signal is generated.

[0057] If the initial health value does not exceed the preset initial health threshold, then the current date is used as the end date and the backtracking period is traced back to a set number of days, P1. Preferably, P1 is thirty-five days. All faults that occur in the waste heat boiler circulating pump during the backtracking period are obtained and classified. The occurrence frequency of the corresponding type of fault during the backtracking period is marked as the obstruction frequency. Each type of fault is pre-set with a set of preset weight values. The preset weight values ​​are all positive numbers, and the more serious the harm caused by the corresponding type of fault to the waste heat boiler circulating pump, the larger the value of the preset weight value.

[0058] The obstruction frequency of the corresponding type of fault is multiplied by the corresponding preset weight value to obtain the obstruction coefficient. The obstruction coefficients of all types of faults that occurred in the waste heat boiler circulating pump during the retrospective period are summed to obtain the health obstruction value. It should be noted that the larger the health obstruction value, the higher the potential operation risk of the waste heat boiler circulating pump.

[0059] The health obstacle value is compared with the preset health obstacle threshold. If the health obstacle value exceeds the preset health obstacle threshold, it indicates that the operation of the waste heat boiler circulating pump has a high risk, which is not conducive to its safe, stable and efficient operation, and a health warning signal is generated. If the health obstacle value does not exceed the preset health obstacle threshold, it indicates that the health status of the waste heat boiler circulating pump is good, which is conducive to its safe, stable and efficient operation, and a health qualified signal is generated.

[0060] Example 2: Figure 1-2 As shown, the difference between this embodiment and Embodiment 1 is that the health status obstacle output module is communicatively connected to the circulating pump management auxiliary analysis module. The health status obstacle output module sends the health status qualified signal to the circulating pump management auxiliary analysis module. When the circulating pump management auxiliary analysis module receives the health status qualified signal, it analyzes the performance of the inspection and maintenance of the waste heat boiler circulating pump within the retrospective period, obtains the auxiliary control qualified signal or the auxiliary control abnormal signal through analysis, and sends the auxiliary control qualified signal or the auxiliary control abnormal signal to the remote monitoring center.

[0061] When the remote monitoring center receives an abnormal signal from the auxiliary control system, it issues a corresponding warning, which can urge maintenance personnel to optimize maintenance processes and improve maintenance quality. This provides a management-level guarantee for the healthy operation of the circulating pump, forming a dual protection of "equipment health status + maintenance execution quality" with the health obstacle output module. This further reduces the operational risks of the circulating pump and ensures the long-term stable and reliable operation of the system. The specific analysis process of the circulating pump management auxiliary analysis module is as follows:

[0062] The total number of inspections and maintenance performed on the waste heat boiler circulating pump within the retrospective period is obtained and marked as the total inspection and maintenance frequency value. The number of times the interval between inspections and maintenance performed on the waste heat boiler circulating pump within the retrospective period exceeds the corresponding preset interval threshold is marked as the inspection and maintenance delay value. The total inspection and maintenance frequency value and the inspection and maintenance delay value are compared with the preset total inspection and maintenance frequency threshold and the preset inspection and maintenance delay threshold, respectively. If the total inspection and maintenance frequency value does not exceed the preset total inspection and maintenance frequency threshold or the inspection and maintenance delay value exceeds the preset inspection and maintenance delay threshold, it indicates that the performance of inspection and maintenance of the waste heat boiler circulating pump within the retrospective period is poor, and an auxiliary control abnormality signal is generated.

[0063] Furthermore, if the total frequency of inspections and maintenance exceeds the preset total frequency threshold and the delayed inspection and maintenance value does not exceed the preset delayed inspection and maintenance threshold, then all inspection items for the waste heat boiler circulating pump are obtained, the inspection time for the corresponding inspection items during the inspection and maintenance process is collected, and the inspection time is compared with the corresponding preset inspection time threshold. If the inspection time does not exceed the corresponding preset inspection time threshold, it indicates that the corresponding inspection item is handled carelessly during the inspection and maintenance process, and the corresponding inspection item is marked as an abnormal inspection item.

[0064] The number of abnormal inspection items in the corresponding inspection and maintenance process is obtained and marked as abnormal inspection measurement value. The abnormal inspection measurement value is compared with the preset abnormal inspection measurement threshold. If the abnormal inspection measurement value exceeds the preset abnormal inspection measurement threshold, it indicates that the execution status of the corresponding inspection and maintenance process is not good. Then, an abnormal inspection symbol XP-1 is assigned to the corresponding inspection and maintenance process.

[0065] The number of times the anomaly detection symbol XP-1 is assigned within the retrospective period is obtained and the ratio is calculated with the total frequency value of inspection and maintenance to obtain the anomaly detection ratio value. The anomaly detection ratio value is compared with the preset anomaly detection ratio threshold. If the anomaly detection ratio value exceeds the preset anomaly detection ratio threshold, it indicates that the overall performance of inspection and maintenance of the waste heat boiler circulating pump within the retrospective period is poor, and an auxiliary control anomaly signal is generated. If the anomaly detection ratio value does not exceed the preset anomaly detection ratio threshold, it indicates that the overall performance of inspection and maintenance of the waste heat boiler circulating pump within the retrospective period is good, and an auxiliary control qualified signal is generated.

[0066] The working principle of this invention is as follows: During use, the dynamic clustering and identification module accurately determines the operating condition of the waste heat boiler circulating pump, avoiding the misjudgment problem caused by traditional single-parameter judgment. It can also generate early warning information in a timely manner for unstable operating conditions, providing an accurate basis for subsequent regulation. The collaborative decision control module generates targeted control commands based on the type of unstable operating condition, which helps to ensure the safe and stable operation of the waste heat boiler circulating pump and reduce energy waste and equipment overload risks caused by improper adjustment. The operating condition maintenance assessment module comprehensively evaluates the operating condition maintenance performance through multi-dimensional indicators, avoiding the accumulation of operating fluctuations, significantly improving the long-term stable operation capability of the waste heat boiler circulating pump, reducing the probability of cascading failures, and using a dual-dimensional evaluation logic through the health obstacle output module, which considers both the long-term life consumption of the equipment and the impact of recent failures on health, can trigger early warnings and intervene in maintenance in advance, effectively extending the service life of the waste heat boiler circulating pump and reducing sudden equipment failures and replacement costs.

[0067] In the technical solution of this invention, the threshold, preset value, preset range, etc., are set for result comparison and analysis to determine whether it is good or bad. The magnitude of these values ​​is set and stored based on a combination of large-scale model analysis of sample data and human experience. It can also be appropriately adjusted based on seasonal or common-sense influence conditions. Similarly, the preset weight coefficients, influence factors, etc., are set based on the magnitude of the influence of each parameter on the result, and the specific values ​​are allocated to ultimately reflect the influence on the result. This is also set and stored based on a combination of large-scale model analysis of sample data and human experience. It can also be appropriately adjusted based on seasonal or common-sense influence conditions.

[0068] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, enabling those skilled in the art to better understand and utilize it. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A waste heat boiler circulating pump collaborative control system based on multi-condition variable frequency regulation, characterized in that, It includes a dynamic clustering and identification module for operating conditions, a collaborative decision-making and control module, an operating condition maintenance assessment module, a health status obstacle output module, and a remote monitoring center; The dynamic clustering identification module determines the current operating condition type through dynamic clustering identification analysis and outputs the operating condition type to the remote monitoring center and collaborative decision control module in real time. If the operating condition is not stable, the collaborative decision control module generates corresponding control commands to adjust and control the waste heat boiler circulating pump accordingly. The operating condition maintenance assessment module is used to evaluate the operating condition maintenance performance. It generates an operating condition maintenance qualified signal or an operating condition maintenance abnormal signal through analysis and sends the operating condition maintenance qualified signal or operating condition maintenance abnormal signal to the remote monitoring center. When generating an operating condition maintenance qualified signal, the health status of the waste heat boiler circulating pump is analyzed by the health status obstacle output module. The analysis generates a health status qualified signal or a health status warning signal and sends the health status qualified signal or health status warning signal to the remote monitoring center.

2. The waste heat boiler circulating pump coordinated control system based on multi-condition variable frequency regulation according to claim 1, characterized in that, The specific analysis process of dynamic clustering identification analysis of operating conditions is as follows: real-time acquisition of core operating parameters used to determine the operating conditions of the waste heat boiler circulating pump; preprocessing of the acquired raw data; matching of the preprocessed parameters with a standard parameter library of several typical operating conditions; calculation of the membership degree of the current operating condition to the stable operating condition; and determination of the operating condition with the highest membership degree as the current actual operating condition.

3. The waste heat boiler circulating pump coordinated control system based on multi-condition variable frequency regulation according to claim 2, characterized in that, The preset typical operating conditions include stable operation, high load, low load, and extreme low temperature corrosion risk. If the waste heat boiler circulating pump is in stable operation, no operating condition warning information will be generated; otherwise, an operating condition warning information will be generated.

4. The waste heat boiler circulating pump coordinated control system based on multi-condition variable frequency regulation according to claim 1, characterized in that, The specific analysis process of the operating condition maintenance assessment module includes: The total duration during which the waste heat boiler circulating pump is not in a stable operating condition during the detection period is obtained and marked as a stable operating condition time-out value. If the stable operating condition time-out value exceeds the preset stable operating condition time-out threshold, an operating condition maintenance abnormal signal is generated; if the stable operating condition time-out value does not exceed the preset stable operating condition time-out threshold, an operating condition maintenance decision value is obtained through comprehensive evaluation and analysis of operating condition maintenance. If the operating condition maintenance decision value exceeds the preset operating condition maintenance decision threshold, an operating condition maintenance abnormal signal is generated; otherwise, an operating condition maintenance qualified signal is generated.

5. The waste heat boiler circulating pump coordinated control system based on multi-condition variable frequency regulation according to claim 4, characterized in that, The specific analysis process for the comprehensive assessment and analysis of operating condition maintenance is as follows: The number of times the abnormal control symbol WP-1 is assigned during the detection period is obtained and marked as the abnormal control frequency value. The duration of the stable abnormal condition with the largest value during the detection period is marked as the stable abnormal condition amplitude value. The operating condition maintenance decision value is obtained by weighted summation of the stable operating condition time value, the stable abnormal condition amplitude value and the abnormal control frequency value.

6. The waste heat boiler circulating pump collaborative control system based on multi-condition variable frequency regulation according to claim 1, characterized in that, The specific analysis process for the health status hindering the output module includes: If the initial health value exceeds the preset initial health threshold, a health warning signal is generated; if the initial health value does not exceed the preset initial health threshold, the health obstacle value within the backtracking period is obtained through analysis. If the health obstacle value exceeds the preset health obstacle threshold, a health warning signal is generated; if the health obstacle value does not exceed the preset health obstacle threshold, a health qualified signal is generated.

7. The waste heat boiler circulating pump coordinated control system based on multi-condition variable frequency regulation according to claim 6, characterized in that, The specific method for analyzing and obtaining health obstacle values ​​is as follows: All faults that occurred in the waste heat boiler circulating pump during the retrospective period were obtained and classified. The occurrence frequency of the corresponding type of fault during the retrospective period was marked as the obstruction frequency. The obstruction frequency of the corresponding type of fault was multiplied by the corresponding preset weight value to obtain the obstruction coefficient. The obstruction coefficients of all types of faults that occurred in the waste heat boiler circulating pump during the retrospective period were summed to calculate the health obstruction value.

8. The waste heat boiler circulating pump collaborative control system based on multi-condition variable frequency regulation according to claim 1, characterized in that, The health status hinders the communication connection of the output module with the circulating pump management auxiliary analysis module. When the circulating pump management auxiliary analysis module receives a health status qualified signal, it will analyze the performance of the inspection and maintenance of the waste heat boiler circulating pump within the retrospective period, and send the auxiliary control qualified signal or auxiliary control abnormal signal to the remote monitoring center.

9. The waste heat boiler circulating pump coordinated control system based on multi-condition variable frequency regulation according to claim 8, characterized in that, The specific analysis process of the circulating pump management auxiliary analysis module includes: The total number of inspections and maintenance performed on the waste heat boiler circulating pump within the traceback period is obtained and marked as the total inspection and maintenance frequency value. The number of times the interval between inspections and maintenance performed on the waste heat boiler circulating pump within the traceback period exceeds the corresponding preset interval threshold is marked as the inspection and maintenance delay value. If the total inspection and maintenance frequency value does not exceed the preset total inspection and maintenance frequency threshold or the inspection and maintenance delay value exceeds the preset inspection and maintenance delay threshold, an auxiliary control abnormal signal is generated.

10. The waste heat boiler circulating pump coordinated control system based on multi-condition variable frequency regulation according to claim 9, characterized in that, If the total frequency of inspection and maintenance exceeds the preset total frequency threshold and the delayed inspection and maintenance value does not exceed the preset delayed inspection and maintenance threshold, the number of times the abnormality symbol XP-1 is assigned within the traceback period is obtained and the ratio is calculated with the total frequency of inspection and maintenance to obtain the abnormality ratio value. If the abnormality ratio value exceeds the preset abnormality ratio threshold, an auxiliary control abnormality signal is generated; otherwise, an auxiliary control qualified signal is generated.

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