Fault early warning method and system for flue gas plasma reactor

Abstract

The invention relates to the technical field of flue gas filtration, and discloses a fault early warning method and system for a flue gas plasma reactor, and the method comprises the steps: collecting the electrical parameters and flue gas parameters of the flue gas plasma reactor; acquiring the voltage fluctuation condition of the discharge voltage of the cathode line within a first preset duration according to the discharge voltage of the cathode line, preliminarily judging whether the cathode line is abnormal or not according to the fluctuation condition, judging whether the cathode line is abnormal or not again according to the impedance change value of the cathode line, and calculating an electrical abnormal value according to the voltage fluctuation condition and the impedance change value of the cathode line; preliminarily judging whether the filter screen is abnormal or not according to the speed difference value, obtaining a pollutant outflow concentration change value within a third preset duration according to the pollutant outflow concentration, judging whether the filter screen is abnormal or not again, and calculating an abnormal value of the filter screen according to the speed difference value and the pollutant outflow concentration change value; and performing fault level early warning according to the comprehensive abnormal value. The operation reliability and safety of the flue gas plasma reactor are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas filtration, and in particular to a fault early warning method and system for a flue gas plasma reactor. Background Art

[0002] With increasingly stringent environmental protection requirements, flue gas purification technology has become a key component of industrial pollution control. Flue gas plasma reactors, as highly efficient gas pollutant treatment devices, are widely used in coal-fired power plants, metallurgy, chemical industry, and other industries to remove harmful substances from flue gas. This technology generates plasma through a high-voltage electric field, utilizing the redox reactions of high-energy electrons and free radicals to decompose pollutants. It offers advantages such as fast reaction speed and zero secondary pollution.

[0003] However, in actual operation, flue gas plasma reactors still face numerous technical challenges, particularly the issue of reduced processing efficiency due to equipment failure. Traditional fault monitoring methods primarily rely on single parameter threshold alarms, and most methods only issue alarms after the fault has significantly worsened, failing to provide early warnings. This leads to increased maintenance costs and the risk of excessive pollutant emissions. Furthermore, existing technologies lack the ability to collaboratively analyze electrical and flue gas parameters.

[0004] Therefore, it is necessary to provide a fault warning method and system for a flue gas plasma reactor to solve the problem that traditional monitoring methods cannot achieve early warning and lack coordinated analysis of electrical and flue gas parameters. Summary of the Invention

[0005] In view of this, the present invention proposes a fault warning method and system for a flue gas plasma reactor, aiming to solve the problem that traditional monitoring methods cannot achieve early warning and lack coordinated analysis of electrical and flue gas parameters.

[0006] In one aspect, the present invention provides a fault early warning method for a flue gas plasma reactor, comprising:

[0007] Collecting electrical parameters and flue gas parameters of the flue gas plasma reactor; wherein the electrical parameters include cathode line discharge voltage and cathode line impedance; and the flue gas parameters include flue gas inflow velocity, flue gas outflow velocity, and pollutant outflow concentration;

[0008] obtaining voltage fluctuations of the cathode line discharge voltage within a first preset time period based on the cathode line discharge voltage, preliminarily determining whether the cathode line is abnormal based on the fluctuations, and if the cathode line is determined to be abnormal, obtaining a cathode line impedance change value within a second preset time period based on the cathode line impedance, and again determining whether the cathode line is abnormal based on the cathode line impedance change value, and if the result of the second determination is that the cathode line is abnormal, calculating an electrical abnormality value based on the voltage fluctuations and the cathode line impedance change value;

[0009] Calculating a velocity difference between a flue gas inflow velocity and a flue gas outflow velocity, preliminarily determining whether the filter has an abnormality based on the velocity difference, and if the determination result is that an abnormality has occurred, obtaining a pollutant outflow concentration change value within a third preset time period based on the pollutant outflow concentration, and again determining whether the filter has an abnormality based on the pollutant outflow concentration change value, and if the determination result again is that the filter has an abnormality, calculating a filter abnormality value based on the velocity difference and the pollutant outflow concentration change value;

[0010] A comprehensive abnormal value is calculated by weighted summing of the electrical abnormal value and the filter abnormal value, and a fault level warning is performed based on the comprehensive abnormal value.

[0011] Furthermore, the obtaining of voltage fluctuation of the cathode line discharge voltage within a first preset time period according to the cathode line discharge voltage includes:

[0012] setting a plurality of sampling points within a first preset time period, calculating absolute values ​​of cathode line discharge voltage fluctuation values ​​between adjacent sampling points, arranging the absolute values ​​of the cathode line discharge voltage fluctuation values ​​in descending order, and recording the maximum value among the absolute values ​​of the cathode line discharge voltage fluctuation values ​​as a first voltage fluctuation value;

[0013] The absolute value of the voltage fluctuation between the maximum value of the cathode line discharge voltage and the minimum value of the cathode line discharge voltage during the first preset time period is calculated and recorded as a second voltage fluctuation value.

[0014] Furthermore, the preliminary determination of whether the cathode line is abnormal based on the fluctuation includes:

[0015] Setting a voltage fluctuation threshold, and preliminarily determining that the cathode line is abnormal if the first voltage fluctuation value is greater than or equal to the voltage fluctuation threshold, and / or the second voltage fluctuation value is greater than or equal to the voltage fluctuation threshold;

[0016] Otherwise, it is preliminarily judged that there is no abnormality in the cathode line.

[0017] Furthermore, the determining whether the cathode line is abnormal again based on the cathode line impedance change value includes:

[0018] Calculate the cathode line impedance value at the start time of the second preset time and the cathode line impedance value at the end time of the second preset time;

[0019] Setting an impedance change threshold, and if the cathode line impedance change value is greater than or equal to the impedance change threshold, determining that the cathode line is abnormal again;

[0020] Otherwise, it is determined that there is no abnormality in the cathode line.

[0021] Furthermore, if the result of the second determination is that the cathode line is abnormal, the electrical abnormality value is calculated according to the voltage fluctuation and the cathode line impedance change value, including:

[0022] The electrical anomaly value is calculated by the following formula:

[0023]

[0024] In the above formula, Yd represents the electrical abnormality value, U1 represents the first voltage fluctuation value, U2 represents the second voltage fluctuation value, U0 represents the voltage fluctuation threshold, R represents the cathode line impedance change value, R0 represents the impedance change threshold, a, b and c are all weight coefficients, the value range of a, b and c are all [0, 1], and a+b+c=1.

[0025] Furthermore, the speed difference between the flue gas inflow speed and the flue gas outflow speed is calculated, and when the filter is initially judged to be abnormal based on the speed difference, the following steps are included:

[0026] Setting a speed difference threshold, if the speed difference is greater than or equal to the speed difference threshold, it is preliminarily determined that the filter is abnormal;

[0027] Otherwise, it is determined that there is no abnormality in the filter.

[0028] Furthermore, the step of obtaining a pollutant outflow concentration change value within a third preset time period based on the pollutant outflow concentration, and determining again whether the filter screen is abnormal based on the pollutant outflow concentration change value, includes:

[0029] Calculate the pollutant outflow concentration change value between the pollutant outflow concentration at the start time of the third preset time period and the pollutant outflow concentration at the end time of the third preset time period;

[0030] Setting a pollutant outflow concentration change threshold, if the pollutant outflow concentration change value is greater than or equal to the pollutant outflow concentration change threshold, then determining that the filter is abnormal again;

[0031] Otherwise, it is determined that the filter has no abnormality.

[0032] Furthermore, if the result of the second determination is that the filter is abnormal, the calculation of the filter abnormality value according to the velocity difference and the change in the pollutant outflow concentration includes:

[0033]

[0034] In the above formula, Yl represents the filter abnormal value, V1 represents the velocity difference, V0 represents the velocity difference threshold, N1 represents the pollutant outflow concentration change value, N0 represents the pollutant outflow concentration change threshold, d and e represent weight coefficients, and the value range of d and e are both [0, 1], and d + e = 1.

[0035] Furthermore, when performing a fault level warning based on the comprehensive abnormal value, the method includes:

[0036] Setting a first outlier value and a second outlier value, wherein the first outlier value is smaller than the second outlier value;

[0037] If the comprehensive abnormal value is smaller than the first abnormal value, a first-level fault warning is issued;

[0038] If the comprehensive abnormal value is greater than or equal to the first abnormal value and less than or equal to the second abnormal value, a secondary fault warning is performed;

[0039] If the comprehensive abnormal value is greater than the second abnormal value, a third-level fault warning is performed;

[0040] Among them, the fault warning levels from low to high are level one fault warning, level two fault warning and level three fault warning.

[0041] Compared with existing technologies, the present invention offers the advantage of enabling real-time monitoring of the reactor's operating status and fault prediction by collecting and analyzing key parameters. First, by collecting electrical and flue gas parameters, a preliminary assessment of the reactor's operating status can be performed. By analyzing the fluctuations in the cathode line discharge voltage, a preliminary determination can be made as to whether the cathode line is experiencing an anomaly. If this is initially determined to be an anomaly, further analysis of changes in the cathode line impedance can more accurately confirm the line's condition. Similarly, by calculating the difference between the flue gas inflow and outflow velocities, a preliminary determination can be made as to whether the filter is experiencing an anomaly. Combined with changes in the pollutant outflow concentration, the filter's condition can be further confirmed. A weighted summation of the electrical and filter anomaly values ​​yields a comprehensive anomaly value, which can be used as a basis for fault level warnings. This method offers the advantage of timely detection of potential faults, avoiding unplanned reactor downtime, reducing maintenance costs, and improving the overall system's operating efficiency and safety. This comprehensive monitoring and early warning mechanism enables precise health management of the flue gas plasma reactor, ensuring its long-term stable operation.

[0042] On the other hand, the present application also provides a fault warning system for a flue gas plasma reactor, comprising:

[0043] a collection module configured to collect electrical parameters and flue gas parameters of the flue gas plasma reactor; wherein the electrical parameters include cathode line discharge voltage and cathode line impedance; and the flue gas parameters include flue gas inflow velocity, flue gas outflow velocity, and pollutant outflow concentration;

[0044] an electrical anomaly determination module configured to obtain voltage fluctuations of the cathode line discharge voltage within a first preset time period based on the cathode line discharge voltage, preliminarily determine whether the cathode line is abnormal based on the fluctuations, and if the cathode line is determined to be abnormal, obtain a cathode line impedance change value within a second preset time period based on the cathode line impedance, and again determine whether the cathode line is abnormal based on the cathode line impedance change value; and if the result of the second determination is that the cathode line is abnormal, calculate an electrical anomaly value based on the voltage fluctuations and the cathode line impedance change value;

[0045] a filter abnormality judgment module configured to calculate a speed difference between a flue gas inflow speed and a flue gas outflow speed, preliminarily judge whether the filter has an abnormality based on the speed difference, and if the judgment result is that the filter has an abnormality, obtain a pollutant outflow concentration change value within a third preset time period based on the pollutant outflow concentration, and again judge whether the filter has an abnormality based on the pollutant outflow concentration change value; if the result of the second judgment is that the filter has an abnormality, calculate a filter abnormality value based on the speed difference and the pollutant outflow concentration change value;

[0046] The early warning module is configured to calculate a comprehensive abnormal value by weighted summing of the electrical abnormal value and the filter abnormal value, and to issue a fault level early warning according to the comprehensive abnormal value.

[0047] It is understandable that the fault warning method and system for the flue gas plasma reactor provided in this application have the same beneficial effects and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0049] Figure 1 A flow chart of a fault warning method for a flue gas plasma reactor provided by an embodiment of the present invention;

[0050] Figure 2 This is a functional block diagram of a fault warning system for a flue gas plasma reactor provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0051] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0052] In some embodiments of this application, see Figure 1 As shown, this embodiment provides a fault warning method for a flue gas plasma reactor, comprising the following steps:

[0053] S100, collecting electrical parameters and flue gas parameters of the flue gas plasma reactor; wherein the electrical parameters include cathode line discharge voltage and cathode line impedance; and the flue gas parameters include flue gas inflow velocity, flue gas outflow velocity, and pollutant outflow concentration;

[0054] S200, obtaining voltage fluctuations of the cathode line discharge voltage within a first preset time period based on the cathode line discharge voltage, preliminarily determining whether the cathode line is abnormal based on the fluctuations, and if the cathode line is determined to be abnormal, obtaining a cathode line impedance change value within a second preset time period based on the cathode line impedance, and again determining whether the cathode line is abnormal based on the cathode line impedance change value. If the result of the second determination is that the cathode line is abnormal, calculating an electrical abnormality value based on the voltage fluctuations and the cathode line impedance change value;

[0055] S300, calculating the velocity difference between the flue gas inflow velocity and the flue gas outflow velocity, and preliminarily determining whether the filter has an abnormality based on the velocity difference. If the determination result is that an abnormality has occurred, obtaining a change value of the pollutant outflow concentration within a third preset time period based on the pollutant outflow concentration, and again determining whether the filter has an abnormality based on the change value of the pollutant outflow concentration. If the determination result again is that the filter has an abnormality, calculating a filter abnormality value based on the velocity difference and the change value of the pollutant outflow concentration.

[0056] S400 , calculating a comprehensive abnormal value by weighted summation of the electrical abnormal value and the filter abnormal value, and issuing a fault level warning based on the comprehensive abnormal value.

[0057] As can be understood, real-time monitoring of the reactor's operating status and fault prediction are achieved by collecting and analyzing key parameters. First, by collecting electrical and flue gas parameters, a preliminary assessment of the reactor's operating status can be made. By analyzing the fluctuations in the cathode discharge voltage, a preliminary determination can be made whether the cathode line is abnormal. If this is initially determined to be abnormal, further analysis of changes in the cathode line impedance can more accurately confirm the line's condition. Similarly, by calculating the difference between the flue gas inflow and outflow velocities, a preliminary determination can be made whether the filter is abnormal. Combined with changes in the pollutant outflow concentration, the filter's condition can be further confirmed. A weighted summation of the electrical and filter anomaly values ​​yields a comprehensive anomaly value, which serves as the basis for fault level warnings. The advantage of this approach is that it can promptly detect potential faults, avoid unplanned reactor downtime, reduce maintenance costs, and improve the overall system's operational efficiency and safety. This comprehensive monitoring and early warning mechanism enables precise health management of the flue gas plasma reactor, ensuring its long-term stable operation.

[0058] Preferably, the flue gas plasma reactor is the flue gas plasma reactor with publication number CN107376606A. The pollutant outflow concentration refers to the sum of all pollutant concentrations of the flue gas flowing out of the plasma reactor after being treated.

[0059] In some embodiments of the present application, obtaining voltage fluctuation of the cathode line discharge voltage within a first preset time period according to the cathode line discharge voltage includes:

[0060] Setting a plurality of sampling points within a first preset time period, calculating the absolute values ​​of cathode line discharge voltage fluctuation values ​​between adjacent sampling points, arranging the absolute values ​​of the cathode line discharge voltage fluctuation values ​​in descending order, and recording the maximum value among the absolute values ​​of the cathode line discharge voltage fluctuation values ​​as a first voltage fluctuation value;

[0061] The absolute value of the voltage fluctuation between the maximum value of the cathode line discharge voltage and the minimum value of the cathode line discharge voltage during the first preset time period is calculated and recorded as a second voltage fluctuation value.

[0062] In some embodiments of the present application, the preliminary determination of whether the cathode line is abnormal based on the fluctuation includes:

[0063] Setting a voltage fluctuation threshold, if the first voltage fluctuation value is greater than or equal to the voltage fluctuation threshold, and / or the second voltage fluctuation value is greater than or equal to the voltage fluctuation threshold, preliminarily determining that the cathode line is abnormal;

[0064] Otherwise, it is preliminarily judged that there is no abnormality in the cathode line.

[0065] It is understandable that by setting a number of acquisition points and calculating the fluctuations in the cathode line discharge voltage over a first preset time period, the operating status of the cathode line can be effectively monitored. Specifically, by calculating the absolute values ​​of the voltage fluctuation values ​​between adjacent sampling points and arranging them in descending order, the largest voltage fluctuation value, i.e., the first voltage fluctuation value, can be identified. In addition, the voltage fluctuation value between the maximum and minimum values ​​of the cathode line discharge voltage, i.e., the second voltage fluctuation value, is also calculated. By setting a voltage fluctuation threshold, if the first or second voltage fluctuation value is greater than or equal to the threshold, it is preliminarily determined that the cathode line is abnormal; otherwise, the cathode line is considered to be operating normally. This method helps to promptly identify potential problems with the cathode line, so that appropriate maintenance measures can be taken to ensure stable operation of the equipment and extend its service life.

[0066] In some embodiments of the present application, determining again whether the cathode line is abnormal based on the cathode line impedance change value includes:

[0067] Calculate the cathode line impedance value at the start time of the second preset time and the cathode line impedance value at the end time of the second preset time;

[0068] Set the impedance change threshold. If the cathode line impedance change value is greater than or equal to the impedance change threshold, the cathode line is judged to be abnormal again.

[0069] Otherwise, it is judged that there is no abnormality in the cathode line.

[0070] It is understood that by calculating the cathode line impedance change value at the start and end of the second preset duration and setting an impedance change threshold, it is possible to effectively determine again whether the cathode line has an abnormality. If the impedance change value is greater than or equal to the threshold, the cathode line will be determined to be abnormal again, thereby triggering appropriate treatment measures. Conversely, if the impedance change value is less than the threshold, the cathode line is determined to be normal, ensuring the normal operation of the flue gas plasma reactor. The present invention helps to promptly detect and address potential faults, thereby improving the stability and reliability of the flue gas plasma reactor.

[0071] In some embodiments of the present application, if the result of the second determination is that the cathode line is abnormal, the electrical abnormality value is calculated based on the voltage fluctuation and the cathode line impedance change value, including:

[0072] The electrical anomaly value is calculated using the following formula:

[0073]

[0074] In the above formula, Yd represents the electrical abnormality value, U1 represents the first voltage fluctuation value, U2 represents the second voltage fluctuation value, U0 represents the voltage fluctuation threshold, R represents the cathode line impedance change value, R0 represents the impedance change threshold, a, b and c are all weight coefficients, the value range of a, b and c are all [0, 1], and a+b+c=1.

[0075] It's understandable that when the cathode line is again determined to be abnormal, the electrical anomaly value, calculated by combining voltage fluctuations and cathode line impedance changes, can more accurately assess the health of the electrical system. Specifically, the formula used to calculate the electrical anomaly value comprehensively considers the impact of multiple factors on the electrical system. By assigning appropriate weights to different factors, it can more accurately reflect the actual electrical anomaly, providing a more precise basis for maintenance and fault diagnosis.

[0076] In some embodiments of the present application, calculating the speed difference between the smoke inflow speed and the smoke outflow speed, and preliminarily determining whether the filter screen is abnormal based on the speed difference, includes:

[0077] Set the speed difference threshold. If the speed difference is greater than or equal to the speed difference threshold, it is preliminarily determined that the filter is abnormal.

[0078] Otherwise, it is determined that there is no abnormality in the filter.

[0079] In some embodiments of the present application, obtaining a pollutant outflow concentration change value within a third preset time period based on the pollutant outflow concentration, and determining again whether the filter screen is abnormal based on the pollutant outflow concentration change value includes:

[0080] Calculate the pollutant outflow concentration change value between the pollutant outflow concentration at the start time of the third preset time period and the pollutant outflow concentration at the end time of the third preset time period;

[0081] Set the pollutant outflow concentration change threshold. If the pollutant outflow concentration change value is greater than or equal to the pollutant outflow concentration change threshold, the filter will be judged as abnormal again;

[0082] Otherwise, it is determined that there is no abnormality in the filter.

[0083] In some embodiments of the present application, if the result of the second determination is that the filter is abnormal, the calculation of the filter abnormality value based on the velocity difference and the change in the pollutant outflow concentration includes:

[0084]

[0085] In the above formula, Yl represents the filter abnormal value, V1 represents the velocity difference, V0 represents the velocity difference threshold, N1 represents the pollutant outflow concentration change value, N0 represents the pollutant outflow concentration change threshold, d and e represent weight coefficients, and the value range of d and e are both [0, 1], and d + e = 1.

[0086] It is understandable that by calculating the difference between the flue gas inflow velocity and the outflow velocity to preliminarily determine whether the filter is abnormal, this method can quickly identify the initial signs of deterioration in filter performance. A velocity difference threshold is set. When the actual measured velocity difference exceeds this threshold, it can be preliminarily determined that there may be a problem with the filter. In addition, by monitoring the changes in the pollutant outflow concentration, the abnormal state of the filter can be further confirmed. If the change in the pollutant outflow concentration exceeds the set concentration change threshold within the third preset time period, the possibility of filter abnormality is further increased. In order to quantify the degree of abnormality of the filter, the present application also provides a method for calculating the filter abnormality value. By combining the velocity difference and the pollutant outflow concentration change value and assigning them different weight coefficients, a comprehensive filter abnormality value Yl can be obtained. This method not only improves the accuracy of abnormality detection, but also can flexibly adapt to the detection needs in different situations by adjusting the weight coefficient, thereby providing a scientific basis for maintaining and replacing the filter.

[0087] In some embodiments of the present application, when a fault level warning is performed based on the comprehensive abnormal value, it includes:

[0088] Set a first outlier value and a second outlier value, wherein the first outlier value is smaller than the second outlier value;

[0089] If the comprehensive abnormal value is less than the first abnormal value, a first-level fault warning is issued;

[0090] If the comprehensive abnormal value is greater than or equal to the first abnormal value and less than or equal to the second abnormal value, a secondary fault warning is issued;

[0091] If the comprehensive abnormal value is greater than the second abnormal value, a third-level fault warning is issued;

[0092] Among them, the fault warning levels from low to high are level one fault warning, level two fault warning and level three fault warning.

[0093] It can be understood that, first of all, by setting two thresholds, it is possible to provide graded warnings for different degrees of abnormalities, thereby providing more refined fault management. When the comprehensive abnormality value is less than the first abnormality value, a first-level fault warning is issued, which indicates that the degree of abnormality is low and may only require routine monitoring or minor intervention. If the comprehensive abnormality value is between the first and second abnormality values, a second-level fault warning is issued, which indicates that the degree of abnormality is moderate and further inspection or measures are required. When the comprehensive abnormality value exceeds the second abnormality value, a third-level fault warning is issued, which indicates that the degree of abnormality is high and emergency measures need to be taken immediately to prevent potential serious faults. Through this graded warning mechanism, maintenance personnel can be effectively guided to take appropriate countermeasures according to the severity of the fault, thereby improving the stability and reliability of the flue gas plasma reactor, reducing downtime caused by faults, and ultimately improving overall operational efficiency and economic benefits.

[0094] On the other hand, see Figure 2 As shown, the present application also provides a fault warning system for a flue gas plasma reactor, which is used to apply the above-mentioned fault warning method for a flue gas plasma reactor, including:

[0095] a collection module configured to collect electrical parameters and flue gas parameters of the flue gas plasma reactor; wherein the electrical parameters include cathode line discharge voltage and cathode line impedance; and the flue gas parameters include flue gas inflow velocity, flue gas outflow velocity, and pollutant outflow concentration;

[0096] an electrical anomaly determination module configured to obtain voltage fluctuations of the cathode line discharge voltage within a first preset time period based on the cathode line discharge voltage, preliminarily determine whether the cathode line is abnormal based on the fluctuations, and if the cathode line is determined to be abnormal, obtain a cathode line impedance change value within a second preset time period based on the cathode line impedance, and again determine whether the cathode line is abnormal based on the cathode line impedance change value; and if the result of the second determination is that the cathode line is abnormal, calculate an electrical anomaly value based on the voltage fluctuations and the cathode line impedance change value;

[0097] a filter abnormality judgment module configured to calculate a velocity difference between a flue gas inflow velocity and a flue gas outflow velocity, preliminarily judge whether the filter has an abnormality based on the velocity difference, and if the judgment result is that the filter has an abnormality, obtain a pollutant outflow concentration change value within a third preset time period based on the pollutant outflow concentration, and again judge whether the filter has an abnormality based on the pollutant outflow concentration change value; if the result of the second judgment is that the filter has an abnormality, calculate the filter abnormality value based on the velocity difference and the pollutant outflow concentration change value;

[0098] The early warning module is configured to calculate a comprehensive abnormal value by weighted summing of the electrical abnormal value and the filter abnormal value, and to issue a fault level early warning based on the comprehensive abnormal value.

[0099] As can be seen, by using the acquisition module to monitor the reactor's electrical and flue gas parameters in real time, the system can promptly detect changes in key data, such as cathode discharge voltage and impedance, flue gas flow rate, and pollutant outflow concentration. These parameters can reveal early signs of equipment operating status. The addition of an electrical anomaly detection module and a filter anomaly detection module further enhances the system's early warning capabilities. The electrical anomaly detection module analyzes voltage fluctuations and impedance changes to determine whether the cathode line is experiencing an anomaly, while the filter anomaly detection module assesses filter status by comparing the difference between flue gas inflow and outflow velocities and changes in pollutant outflow concentration. This hierarchical detection mechanism ensures accurate identification of anomalies, thereby avoiding potential equipment failures. The early warning module weights and sums the electrical and filter anomaly values ​​to calculate a comprehensive anomaly value, which is then used to issue a fault level warning. This comprehensive assessment ensures accurate and timely warnings, allowing operators to take necessary preventive measures, reducing downtime, improving production efficiency, and ensuring environmental safety. Overall, this system significantly improves the operational reliability and safety of the flue gas plasma reactor by providing a comprehensive monitoring and early warning mechanism.

[0100] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or a combination of software and hardware embodiments. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0101] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0102] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0103] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A fault warning method for a flue gas plasma reactor, characterized in that: include: Collecting electrical parameters and flue gas parameters of the flue gas plasma reactor; wherein the electrical parameters include cathode line discharge voltage and cathode line impedance; and the flue gas parameters include flue gas inflow velocity, flue gas outflow velocity, and pollutant outflow concentration; obtaining voltage fluctuations of the cathode line discharge voltage within a first preset time period based on the cathode line discharge voltage, preliminarily determining whether the cathode line is abnormal based on the fluctuations, and if the cathode line is determined to be abnormal, obtaining a cathode line impedance change value within a second preset time period based on the cathode line impedance, and again determining whether the cathode line is abnormal based on the cathode line impedance change value, and if the result of the second determination is that the cathode line is abnormal, calculating an electrical abnormality value based on the voltage fluctuations and the cathode line impedance change value; Calculating a velocity difference between a flue gas inflow velocity and a flue gas outflow velocity, preliminarily determining whether the filter has an abnormality based on the velocity difference, and if the determination result is that an abnormality has occurred, obtaining a pollutant outflow concentration change value within a third preset time period based on the pollutant outflow concentration, and again determining whether the filter has an abnormality based on the pollutant outflow concentration change value, and if the determination result again is that the filter has an abnormality, calculating a filter abnormality value based on the velocity difference and the pollutant outflow concentration change value; A comprehensive abnormal value is calculated by weighted summing of the electrical abnormal value and the filter abnormal value, and a fault level warning is performed based on the comprehensive abnormal value.

2. The fault warning method for a flue gas plasma reactor according to claim 1, characterized in that: The step of obtaining voltage fluctuation of the cathode line discharge voltage within a first preset time period according to the cathode line discharge voltage includes: setting a plurality of sampling points within a first preset time period, calculating absolute values ​​of cathode line discharge voltage fluctuation values ​​between adjacent sampling points, arranging the absolute values ​​of the cathode line discharge voltage fluctuation values ​​in descending order, and recording the maximum value among the absolute values ​​of the cathode line discharge voltage fluctuation values ​​as a first voltage fluctuation value; The absolute value of the voltage fluctuation between the maximum value of the cathode line discharge voltage and the minimum value of the cathode line discharge voltage during the first preset time period is calculated and recorded as a second voltage fluctuation value.

3. The fault warning method for a flue gas plasma reactor according to claim 2, characterized in that: The preliminary determination of whether the cathode line is abnormal based on the fluctuation includes: Setting a voltage fluctuation threshold, and preliminarily determining that the cathode line is abnormal if the first voltage fluctuation value is greater than or equal to the voltage fluctuation threshold, and / or the second voltage fluctuation value is greater than or equal to the voltage fluctuation threshold; Otherwise, it is preliminarily judged that there is no abnormality in the cathode line.

4. The fault warning method for a flue gas plasma reactor according to claim 3, characterized in that: The step of determining again whether the cathode line is abnormal based on the cathode line impedance change value includes: Calculate the cathode line impedance value at the start time of the second preset time and the cathode line impedance value at the end time of the second preset time; Setting an impedance change threshold, and if the cathode line impedance change value is greater than or equal to the impedance change threshold, determining that the cathode line is abnormal again; Otherwise, it is determined that there is no abnormality in the cathode line.

5. The fault warning method for a flue gas plasma reactor according to claim 4, characterized in that: If the result of the second determination is that the cathode line is abnormal, then calculating the electrical abnormality value based on the voltage fluctuation and the cathode line impedance change value includes: The electrical anomaly value is calculated by the following formula: In the above formula, Yd represents the electrical abnormality value, U1 represents the first voltage fluctuation value, U2 represents the second voltage fluctuation value, U0 represents the voltage fluctuation threshold, R represents the cathode line impedance change value, R0 represents the impedance change threshold, a, b and c are all weight coefficients, the value range of a, b and c are all [0, 1], and a+b+c=1.

6. The fault warning method for a flue gas plasma reactor according to claim 5, characterized in that: Calculating the speed difference between the flue gas inflow speed and the flue gas outflow speed, and preliminarily determining whether the filter is abnormal based on the speed difference, including: Setting a speed difference threshold, if the speed difference is greater than or equal to the speed difference threshold, it is preliminarily determined that the filter is abnormal; Otherwise, it is determined that there is no abnormality in the filter.

7. The fault warning method for a flue gas plasma reactor according to claim 6, characterized in that: The step of obtaining a pollutant outflow concentration change value within a third preset time period based on the pollutant outflow concentration, and determining again whether the filter screen is abnormal based on the pollutant outflow concentration change value, includes: Calculate the pollutant outflow concentration change value between the pollutant outflow concentration at the start time of the third preset time period and the pollutant outflow concentration at the end time of the third preset time period; Setting a pollutant outflow concentration change threshold, if the pollutant outflow concentration change value is greater than or equal to the pollutant outflow concentration change threshold, then determining that the filter is abnormal again; Otherwise, it is determined that the filter has no abnormality.

8. The fault warning method for a flue gas plasma reactor according to claim 7, characterized in that: If the result of the second determination is that the filter is abnormal, the filter abnormality value is calculated according to the velocity difference and the change in the pollutant outflow concentration, including: In the above formula, Yl represents the filter abnormal value, V1 represents the velocity difference, V0 represents the velocity difference threshold, N1 represents the pollutant outflow concentration change value, N0 represents the pollutant outflow concentration change threshold, d and e represent weight coefficients, and the value range of d and e are both [0, 1], and d + e = 1.

9. The fault warning method for a flue gas plasma reactor according to claim 8, characterized in that: The fault level warning is performed according to the comprehensive abnormal value, including: Setting a first outlier value and a second outlier value, wherein the first outlier value is smaller than the second outlier value; If the comprehensive abnormal value is less than the first abnormal value, a first-level fault warning is issued; If the comprehensive abnormal value is greater than or equal to the first abnormal value and less than or equal to the second abnormal value, a secondary fault warning is performed; If the comprehensive abnormal value is greater than the second abnormal value, a third-level fault warning is performed; Among them, the fault warning levels from low to high are level one fault warning, level two fault warning and level three fault warning.

10. A fault warning system for a flue gas plasma reactor, used for applying the fault warning method for a flue gas plasma reactor according to any one of claims 1 to 9, characterized in that: include: a collection module configured to collect electrical parameters and flue gas parameters of the flue gas plasma reactor; wherein the electrical parameters include cathode line discharge voltage and cathode line impedance; and the flue gas parameters include flue gas inflow velocity, flue gas outflow velocity, and pollutant outflow concentration; an electrical anomaly determination module configured to obtain voltage fluctuations of the cathode line discharge voltage within a first preset time period based on the cathode line discharge voltage, preliminarily determine whether the cathode line is abnormal based on the fluctuations, and if the cathode line is determined to be abnormal, obtain a cathode line impedance change value within a second preset time period based on the cathode line impedance, and again determine whether the cathode line is abnormal based on the cathode line impedance change value; and if the result of the second determination is that the cathode line is abnormal, calculate an electrical anomaly value based on the voltage fluctuations and the cathode line impedance change value; a filter abnormality judgment module configured to calculate a speed difference between a flue gas inflow speed and a flue gas outflow speed, preliminarily judge whether the filter has an abnormality based on the speed difference, and if the judgment result is that the filter has an abnormality, obtain a pollutant outflow concentration change value within a third preset time period based on the pollutant outflow concentration, and again judge whether the filter has an abnormality based on the pollutant outflow concentration change value; if the result of the second judgment is that the filter has an abnormality, calculate a filter abnormality value based on the speed difference and the pollutant outflow concentration change value; The early warning module is configured to calculate a comprehensive abnormal value by weighted summing of the electrical abnormal value and the filter abnormal value, and to issue a fault level early warning according to the comprehensive abnormal value.

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