A monitoring method and system for flue gas desulfurization and denitrification

Abstract

This application relates to a monitoring method and system for flue gas desulfurization and denitrification, specifically in the field of desulfurization towers. The method includes acquiring, at preset time intervals, the sulfur dioxide concentration of the flue gas collected by monitoring probes above each spray layer, the humidity of the monitoring probe surface above each spray layer, and the initial sulfur dioxide concentration of the flue gas entering the desulfurization tower. Based on the sulfur dioxide concentration of the flue gas above each spray layer, the humidity of the monitoring probe surface, and the initial sulfur dioxide concentration, the method determines the desulfurization efficiency value of each spray layer within each time interval. Based on the sulfur dioxide concentration of the flue gas above each spray layer within each time interval, the desulfurization efficiency value of each spray layer, and the initial sulfur dioxide concentration, the method determines the desulfurization quality value of the desulfurization tower within each time interval. Based on the desulfurization quality values ​​of the desulfurization tower across multiple time intervals, the method determines whether the desulfurization tower is operating abnormally. This application enables the determination of whether a desulfurization tower is malfunctioning based on the operating status of multiple spray layers within the desulfurization tower.

Description

Technical Field

[0001] This application relates to the field of desulfurization towers, and in particular to a monitoring method and system for flue gas desulfurization and denitrification. Background Technology

[0002] Desulfurization towers are important equipment in thermal power generation, used to remove pollutants such as sulfur dioxide from the flue gas produced by coal combustion, thereby reducing environmental pollution and ensuring that the emitted gases meet standards.

[0003] Desulfurization towers primarily desulfurize flue gas through multiple spray layers. Each spray layer has multiple nozzles for injecting desulfurizing agent. The sprayed desulfurizing agent combines with sulfur dioxide in the flue gas and settles, thereby reducing pollutants in the flue gas. Currently, sensors are installed at the outlet of the desulfurization tower to collect the sulfur dioxide concentration in the treated flue gas, thus determining whether desulfurization meets standards. However, this method cannot provide information on the operation of the multiple spray layers within the desulfurization tower, nor can it determine whether there are any abnormalities in the desulfurization tower based on the operation of these multiple spray layers. Therefore, determining whether there are any abnormalities in the desulfurization tower based on the operation of the multiple spray layers becomes a problem. Summary of the Invention

[0004] In order to determine whether there is an abnormality in the desulfurization tower based on the working status of multiple spray layers in the desulfurization tower, this application provides a monitoring method and system for flue gas desulfurization and denitrification.

[0005] Firstly, this application provides a monitoring method for flue gas desulfurization and denitrification, employing the following technical solution: A monitoring method for flue gas desulfurization and denitrification, comprising: The sulfur dioxide concentration of flue gas collected by the monitoring probe above each spray layer, the humidity of the monitoring probe surface above each spray layer, and the initial sulfur dioxide concentration of flue gas entering the desulfurization tower are obtained at preset time intervals. The desulfurization efficiency value of each spray layer in each time interval is determined based on the sulfur dioxide concentration of the flue gas above each spray layer, the humidity of the monitoring probe surface, and the initial sulfur dioxide concentration. The desulfurization quality value of the desulfurization tower in each time interval is determined based on the sulfur dioxide concentration of the flue gas above each spray layer in each time interval, the desulfurization efficiency value of each spray layer, and the initial sulfur dioxide concentration. The desulfurization quality values ​​of the desulfurization tower at multiple time intervals are used to determine whether the desulfurization tower is operating abnormally.

[0006] By adopting the above technical solution, the sulfur dioxide concentration collected by the monitoring probes above each spray layer, the humidity on the surface of the monitoring probes, and the initial sulfur dioxide concentration in the flue gas are obtained. This facilitates subsequent analysis of the working condition of each spray layer and the overall operation of the desulfurization tower. The sulfur dioxide concentration above each spray layer characterizes the specific performance of the spray layer in flue gas desulfurization. The humidity on the surface of the monitoring probes introduces errors in the collected sulfur dioxide concentration. Higher humidity means that sulfur dioxide is more soluble in water, leading to a lower sulfur dioxide concentration collected by the monitoring probes compared to the actual concentration. Therefore, the humidity on the surface of the monitoring probes is used to subsequently correct the sulfur dioxide concentration. Using the initial sulfur dioxide concentration as the initial input, combined with the sulfur dioxide concentration of the treated flue gas above each spray layer and the humidity of the monitoring probe surface, the desulfurization efficiency value of each spray layer in each time interval can be determined more accurately. After obtaining the desulfurization efficiency value of the flue gas above each spray layer in each time interval, the overall desulfurization quality value of the desulfurization tower in each time interval can be accurately analyzed by combining the sulfur dioxide concentration above each spray layer in each time interval and the initial sulfur dioxide concentration. Finally, based on the desulfurization quality values ​​of the desulfurization tower in multiple time intervals, it is possible to accurately analyze whether the desulfurization tower is operating abnormally during the operation of multiple time intervals.

[0007] In another possible implementation, determining the desulfurization efficiency value of each spray layer within each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer, the humidity of the monitoring probe surface, and the initial sulfur dioxide concentration includes: The compensation coefficient for the sulfur dioxide concentration above each spray layer is determined based on the humidity of the monitoring probe surface above each spray layer. The sulfur dioxide concentration above each spray layer is compensated based on the compensation coefficient to obtain the compensated sulfur dioxide concentration; Determine the concentration difference between the compensated sulfur dioxide concentration and the initial sulfur dioxide concentration at the same time point in each time interval; The concentration difference variation function for each spray layer is determined based on the concentration difference. The average concentration difference, minimum concentration difference, trend of concentration difference, and rate of change of concentration difference are determined from the concentration difference change function. The desulfurization efficiency value of each spray layer within each time interval is determined based on the average concentration difference, the minimum concentration difference, the trend of concentration difference change, and the rate of concentration difference change.

[0008] In another possible implementation, determining the desulfurization efficiency value of each spray layer within each time interval based on the average concentration difference, the minimum concentration difference, the concentration difference trend, and the concentration difference rate of change includes: The candidate desulfurization efficiency value for each spray layer is determined based on the average and minimum concentration difference values ​​of each spray layer. The efficiency correction value for each spray layer is determined based on the importance weight of each spray layer and the rate of change of the concentration difference; If there is a first spray layer where the rate of change of concentration difference is constant or increases, then the sum of the candidate desulfurization efficiency value and the efficiency correction value of each first spray layer is used to obtain the desulfurization efficiency value. If there is a second spray layer where the rate of change of concentration difference is decreasing, the desulfurization efficiency value is obtained by determining the difference between the candidate desulfurization efficiency value and the efficiency correction value of each second spray layer.

[0009] In another possible implementation, determining the desulfurization quality value of the desulfurization tower in each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer in each time interval, the desulfurization efficiency value of each spray layer, and the initial sulfur dioxide concentration includes: The target sulfur dioxide concentration above the uppermost spray layer is determined in each time interval, and the average value of all target sulfur dioxide concentrations in each time interval is calculated to obtain the first target average value. Determine a second concentration difference between the first target average value and the second target average value, wherein the second target average value is the average of all initial sulfur dioxide concentrations in each time interval; The desulfurization efficiency value of each spray layer within each time interval is subtracted from the preset efficiency value corresponding to each spray layer to obtain a target desulfurization efficiency value that is lower than the preset efficiency value. The preset efficiency value is the efficiency value when the desulfurization efficiency of each spray layer is qualified. Determine the total number of target desulfurization efficiency values, and determine the difference between each target desulfurization efficiency value and its corresponding preset efficiency value; Determine the average sulfur dioxide concentration of each spray layer in each time interval, and determine the concentration reduction of flue gas after passing through each spray layer based on the average sulfur dioxide concentration on both sides of each spray layer; The desulfurization sub-mass value of each spray layer is determined based on the concentration reduction value of each spray layer and the desulfurization efficiency value of each spray layer; The desulfurization quality value of the desulfurization tower in each time interval is determined based on the second concentration difference, the number of all target desulfurization efficiency values, the efficiency difference between each target desulfurization efficiency value and the corresponding preset efficiency value, and the desulfurization sub-quality value of each spray layer.

[0010] In another possible implementation, determining the desulfurization quality value of the desulfurization tower in each time interval based on the second concentration difference, the number of all target desulfurization efficiency values, the efficiency difference between each target desulfurization efficiency value and the corresponding preset efficiency value, and the desulfurization sub-quality value of each spray layer includes: The total desulfurization mass value of all spray layers is determined by the sum of the desulfurization mass values. The efficiency deviation value of the spray layer corresponding to each target desulfurization efficiency value is determined based on the weight of the spray layer corresponding to each target desulfurization efficiency value and the efficiency difference. Determine the sum of the efficiency deviations of all target desulfurization efficiency values ​​corresponding to the spray layer; The outliers of the desulfurization tower are determined based on the number of all target desulfurization efficiency values, the sum of efficiency deviations, and their respective weights. The desulfurization score of the desulfurization tower is determined based on the second concentration difference, the sum of the desulfurization sub-quality values, and their respective weights. The ratio of the desulfurization score to the outlier is then determined, and the ratio represents the desulfurization quality value of the desulfurization tower in each time interval.

[0011] In another possible implementation, the determination of whether the desulfurization tower is operating abnormally based on the desulfurization quality values ​​of the desulfurization tower at multiple time intervals includes: The trend and rate of change of desulfurization quality values ​​are determined based on the desulfurization quality values ​​of the desulfurization towers at the multiple time intervals. If the quality value changes in a downward trend and the rate of change of the quality value reaches a preset rate threshold, then the desulfurization tower is determined to be operating abnormally.

[0012] In another possible implementation, the method further includes: Determine the trend and rate of change of the desulfurization sub-mass value for each spray layer during the multiple time intervals; Determine a third target average value of the desulfurization sub-mass value for each spray layer during the plurality of time intervals; The trend of the desulfurization sub-mass value change was determined to be a decreasing target spray layer, and the pressure increase value of the target spray layer was determined based on the change rate of the target spray layer and the third target average value. The pressurization equipment controlling the target spray layer operates according to the pressure increase value.

[0013] Secondly, this application provides a monitoring system for flue gas desulfurization and denitrification, which adopts the following technical solution: A monitoring system for flue gas desulfurization and denitrification, comprising: The data acquisition module is used to acquire the sulfur dioxide concentration of flue gas collected by the monitoring probe above each spray layer, the humidity of the monitoring probe surface above each spray layer, and the initial sulfur dioxide concentration of flue gas entering the desulfurization tower at preset time intervals. The desulfurization efficiency determination module is used to determine the desulfurization efficiency value of each spray layer in each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer, the humidity of the monitoring probe surface, and the initial sulfur dioxide concentration. The desulfurization quality determination module is used to determine the desulfurization quality value of the desulfurization tower in each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer in each time interval, the desulfurization efficiency value of each spray layer, and the initial sulfur dioxide concentration. The anomaly detection module is used to determine whether the desulfurization tower is operating abnormally based on the desulfurization quality values ​​of the desulfurization tower at multiple time intervals.

[0014] By adopting the above technical solution, the data acquisition module obtains the sulfur dioxide concentration, humidity of the probe surface, and initial sulfur dioxide concentration of the flue gas collected by the monitoring probes above each spray layer. This facilitates subsequent analysis of the working condition of each spray layer and the overall operation of the desulfurization tower. The sulfur dioxide concentration above each spray layer characterizes the specific performance of the spray layer in flue gas desulfurization. The humidity of the probe surface causes errors in the collected sulfur dioxide concentration; higher humidity means more soluble sulfur dioxide in water, leading to a lower sulfur dioxide concentration collected by the probes compared to the actual concentration. Therefore, the humidity of the probe surface is used to correct the sulfur dioxide concentration in subsequent steps, thus improving the desulfurization efficiency. The efficiency determination module combines the initial sulfur dioxide concentration, the sulfur dioxide concentration of the treated flue gas above each spray layer, and the humidity of the monitoring probe surface to determine the desulfurization efficiency value of each spray layer in each time interval more accurately. After obtaining the desulfurization efficiency value of the flue gas above each spray layer in each time interval, the desulfurization quality determination module can accurately analyze the overall desulfurization quality value of the desulfurization tower in each time interval by combining the sulfur dioxide concentration above each spray layer in each time interval and the initial sulfur dioxide concentration. Finally, the anomaly judgment module can accurately analyze whether the desulfurization tower is operating abnormally during the operation of the desulfurization tower in multiple time intervals based on the desulfurization quality value of the desulfurization tower in multiple time intervals.

[0015] In another possible implementation, when the desulfurization efficiency determination module determines the desulfurization efficiency value of each spray layer within each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer, the humidity of the monitoring probe surface, and the initial sulfur dioxide concentration, it is specifically used for: The compensation coefficient for the sulfur dioxide concentration above each spray layer is determined based on the humidity of the monitoring probe surface above each spray layer. The sulfur dioxide concentration above each spray layer is compensated based on the compensation coefficient to obtain the compensated sulfur dioxide concentration; Determine the concentration difference between the compensated sulfur dioxide concentration and the initial sulfur dioxide concentration at the same time point in each time interval; The concentration difference variation function for each spray layer is determined based on the concentration difference. The average concentration difference, minimum concentration difference, trend of concentration difference, and rate of change of concentration difference are determined from the concentration difference change function. The desulfurization efficiency value of each spray layer within each time interval is determined based on the average concentration difference, the minimum concentration difference, the trend of concentration difference change, and the rate of concentration difference change.

[0016] In another possible implementation, when the desulfurization efficiency determination module determines the desulfurization efficiency value of each spray layer within each time interval based on the average concentration difference, the minimum concentration difference, the concentration difference trend, and the concentration difference rate of change, it is specifically used for: The candidate desulfurization efficiency value for each spray layer is determined based on the average and minimum concentration difference values ​​of each spray layer. The efficiency correction value for each spray layer is determined based on the importance weight of each spray layer and the rate of change of the concentration difference; If there is a first spray layer where the rate of change of concentration difference is constant or increases, then the sum of the candidate desulfurization efficiency value and the efficiency correction value of each first spray layer is used to obtain the desulfurization efficiency value. If there is a second spray layer where the rate of change of concentration difference is decreasing, the desulfurization efficiency value is obtained by determining the difference between the candidate desulfurization efficiency value and the efficiency correction value of each second spray layer.

[0017] In another possible implementation, when the desulfurization quality determination module determines the desulfurization quality value of the desulfurization tower in each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer in each time interval, the desulfurization efficiency value of each spray layer, and the initial sulfur dioxide concentration, it is specifically used for: The target sulfur dioxide concentration above the uppermost spray layer is determined in each time interval, and the average value of all target sulfur dioxide concentrations in each time interval is calculated to obtain the first target average value. Determine a second concentration difference between the first target average value and the second target average value, wherein the second target average value is the average of all initial sulfur dioxide concentrations in each time interval; The desulfurization efficiency value of each spray layer within each time interval is subtracted from the preset efficiency value corresponding to each spray layer to obtain a target desulfurization efficiency value that is lower than the preset efficiency value. The preset efficiency value is the efficiency value when the desulfurization efficiency of each spray layer is qualified. Determine the total number of target desulfurization efficiency values, and determine the difference between each target desulfurization efficiency value and its corresponding preset efficiency value; Determine the average sulfur dioxide concentration of each spray layer in each time interval, and determine the concentration reduction of flue gas after passing through each spray layer based on the average sulfur dioxide concentration on both sides of each spray layer; The desulfurization sub-mass value of each spray layer is determined based on the concentration reduction value of each spray layer and the desulfurization efficiency value of each spray layer; The desulfurization quality value of the desulfurization tower in each time interval is determined based on the second concentration difference, the number of all target desulfurization efficiency values, the efficiency difference between each target desulfurization efficiency value and the corresponding preset efficiency value, and the desulfurization sub-quality value of each spray layer.

[0018] In another possible implementation, when the desulfurization quality determination module determines the desulfurization quality value of the desulfurization tower in each time interval based on the second concentration difference, the number of all target desulfurization efficiency values, the efficiency difference between each target desulfurization efficiency value and the corresponding preset efficiency value, and the desulfurization sub-quality value of each spray layer, it is specifically used for: The total desulfurization mass value of all spray layers is determined by the sum of the desulfurization mass values. The efficiency deviation value of the spray layer corresponding to each target desulfurization efficiency value is determined based on the weight of the spray layer corresponding to each target desulfurization efficiency value and the efficiency difference. Determine the sum of the efficiency deviations of all target desulfurization efficiency values ​​corresponding to the spray layer; The outliers of the desulfurization tower are determined based on the number of all target desulfurization efficiency values, the sum of efficiency deviations, and their respective weights. The desulfurization score of the desulfurization tower is determined based on the second concentration difference, the sum of the desulfurization sub-quality values, and their respective weights. The ratio of the desulfurization score to the outlier is then determined, and the ratio represents the desulfurization quality value of the desulfurization tower in each time interval.

[0019] In another possible implementation, when the anomaly detection module determines whether the desulfurization tower is malfunctioning based on the desulfurization quality values ​​of the desulfurization tower at multiple time intervals, it is specifically used for: The trend and rate of change of desulfurization quality values ​​are determined based on the desulfurization quality values ​​of the desulfurization towers at the multiple time intervals. If the quality value changes in a downward trend and the rate of change of the quality value reaches a preset rate threshold, then the desulfurization tower is determined to be operating abnormally.

[0020] In another possible implementation, the monitoring system for flue gas desulfurization and denitrification further includes: A trend and rate determination module is used to determine the trend and rate of change of the desulfurization sub-mass value of each spray layer in the multiple time intervals. An average value determination module is used to determine a third target average value of the desulfurization sub-mass value for each spray layer in the plurality of time intervals; The pressure value determination module is used to determine the target spray layer whose desulfurization sub-mass value changes with a decreasing trend, and to determine the pressure increase value of the target spray layer based on the rate of change of the target spray layer and the third target average value. The control module is used to control the pressurization equipment of the target spray layer to operate according to the pressure increase value.

[0021] Thirdly, this application provides an electronic device that adopts the following technical solution: An electronic device comprising: At least one processor; Memory; At least one application, wherein the application is stored in memory and configured to be executed by at least one processor, the at least one configuration being for: executing a flue gas desulfurization and denitrification monitoring method as shown in any possible implementation of the first aspect.

[0022] Fourthly, this application provides a computer-readable storage medium, which adopts the following technical solution: A computer-readable storage medium, when the computer program is executed in a computer, causes the computer to perform a monitoring method for flue gas desulfurization and denitrification as described in any one of the first aspects.

[0023] In summary, this application includes at least one of the following beneficial technical effects: Obtaining the sulfur dioxide concentration, probe surface humidity, and initial sulfur dioxide concentration in the flue gas from the monitoring probes above each spray layer facilitates subsequent analysis of the operation of each spray layer and the overall operation of the desulfurization tower. The sulfur dioxide concentration above each spray layer characterizes the specific performance of the spray layer in flue gas desulfurization. The humidity on the probe surface introduces errors in the collected sulfur dioxide concentration; higher humidity indicates greater sulfur dioxide solubility in water, leading to a lower sulfur dioxide concentration recorded by the probes compared to the actual concentration. Therefore, the humidity on the probe surface is used to correct the sulfur dioxide concentration in subsequent measurements. Using sulfur dioxide concentration as the initial input, combined with the sulfur dioxide concentration of the treated flue gas above each spray layer and the humidity of the monitoring probe surface, the desulfurization efficiency value of each spray layer in each time interval is determined more accurately. After obtaining the desulfurization efficiency value of the flue gas above each spray layer in each time interval, the overall desulfurization quality value of the desulfurization tower in each time interval can be accurately analyzed by combining the sulfur dioxide concentration above each spray layer in each time interval and the initial sulfur dioxide concentration. Finally, based on the desulfurization quality value of the desulfurization tower in multiple time intervals, it is possible to accurately analyze whether the desulfurization tower is operating abnormally during the operation of multiple time intervals. Attached Figure Description

[0024] Figure 1 This is a schematic flowchart of a monitoring method for flue gas desulfurization and denitrification according to an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the structure of a flue gas desulfurization and denitrification monitoring system according to an embodiment of this application.

[0026] Figure 3This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0027] The present application will be further described in detail below with reference to the accompanying drawings.

[0028] After reading this specification, those skilled in the art may make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article, unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.

[0031] The embodiments of this application will now be described in further detail with reference to the accompanying drawings.

[0032] This application provides a method for monitoring flue gas desulfurization and denitrification, executed by an electronic device. This electronic device can be a server or a terminal device. The server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services. The terminal device can be a smartphone, tablet, laptop, desktop computer, etc., but is not limited to these. The terminal device and the server can be directly or indirectly connected via wired or wireless communication. This application does not impose any limitations on this. Figure 1 As shown, the method includes steps S101, S102, S103, and S104, wherein, S101, according to a preset time interval, acquire the sulfur dioxide concentration of flue gas collected by the monitoring probe above each spray layer, the humidity of the monitoring probe surface above each spray layer, and the initial sulfur dioxide concentration of flue gas entering the desulfurization tower.

[0033] In this embodiment, the preset time interval can be set by the operator according to requirements. For example, the preset time interval can be 1 hour, meaning the electronic device acquires data every hour, specifically data from the past hour. The number of spray layers inside the desulfurization tower can be three, four, five, or other layers. An instrument-shaped probe for collecting sulfur dioxide concentration is installed above each spray layer. To avoid monitoring dead zones, the probe is inserted perpendicular to the side wall of the desulfurization tower, reaching about one-third of the tower's diameter. Furthermore, to prevent the desulfurizing agent from adhering to the probe, a baffle is installed above it to separate it from the sprayed desulfurizing agent, preventing data acquisition errors caused by the agent adhering to the probe.

[0034] The sulfur dioxide concentration collected by the monitoring probes above each spray layer characterizes the treatment effect of the flue gas after passing through the spray layer. Due to the high humidity inside the desulfurization tower, humidity sensors are installed on the surface of the monitoring probes to collect the humidity of the microenvironment near the probe surface. Higher humidity means more soluble sulfur dioxide in water, leading to a lower sulfur dioxide concentration near the monitoring probe compared to the actual value, causing data acquisition errors. Therefore, obtaining the humidity on the surface of the monitoring probes facilitates subsequent correction of the data collected. Monitoring probes are also installed at the flue gas inlet of the desulfurization tower to collect the sulfur dioxide concentration in the flue gas immediately entering the tower, i.e., the initial sulfur dioxide concentration. This initial sulfur dioxide concentration serves as an initial condition for subsequent analysis of the operation of each spray layer and the entire desulfurization tower.

[0035] S102, based on the sulfur dioxide concentration of the flue gas above each spray layer, the humidity of the monitoring probe surface, and the initial sulfur dioxide concentration, determine the desulfurization efficiency value of each spray layer in each time interval.

[0036] In this embodiment, the sulfur dioxide concentration of the flue gas above each spray layer characterizes the desulfurization effect of each spray layer on the flue gas. The humidity on the surface of the monitoring probe is used to compensate and correct the sulfur dioxide concentration collected by the monitoring probe, making the sulfur dioxide concentration more accurate. The initial sulfur dioxide concentration is used as the initial state of the flue gas. Combining the sulfur dioxide concentration and humidity of the flue gas above each spray layer makes it easy to know the desulfurization efficiency of each spray layer compared to the initial sulfur dioxide concentration, thereby accurately determining the desulfurization efficiency value characterizing the desulfurization efficiency of each spray layer.

[0037] S103, the desulfurization quality value of the desulfurization tower in each time interval is determined based on the sulfur dioxide concentration of the flue gas above each spray layer in each time interval, the desulfurization efficiency value of each spray layer, and the initial sulfur dioxide concentration.

[0038] In the embodiments of this application, the sulfur dioxide concentration, desulfurization efficiency value, and initial sulfur dioxide concentration of each spray layer within each time interval are key factors affecting the overall operating quality of the desulfurization tower within each time interval. Therefore, after the electronic equipment obtains the sulfur dioxide concentration and desulfurization efficiency value of the flue gas above each spray layer within each time interval, it can accurately determine the overall desulfurization quality of the desulfurization tower in each time interval by combining it with the initial sulfur dioxide concentration of the flue gas within each time interval.

[0039] S104, determine whether the desulfurization tower is operating abnormally based on the desulfurization quality values ​​of the desulfurization tower at multiple time intervals.

[0040] In this embodiment, the multiple time intervals can be two, three, four, or other numbers, set by the staff according to their needs. The electronic equipment analyzes the desulfurization quality values ​​of the desulfurization tower across these multiple time intervals to accurately determine whether the desulfurization tower is operating abnormally within that time span. Furthermore, if the desulfurization tower is operating abnormally, the electronic equipment can control a buzzer, indicator light, or the host computer in the staff monitoring center to issue an alarm, allowing staff to promptly and intuitively learn about the abnormal operation of the desulfurization tower.

[0041] One possible implementation of this application embodiment is that step S102 determines the desulfurization efficiency value of each spray layer within each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer, the humidity of the monitoring probe surface, and the initial sulfur dioxide concentration. Specifically, this includes steps S1021 (not shown in the figure), S1022 (not shown in the figure), S1023 (not shown in the figure), S1024 (not shown in the figure), S1025 (not shown in the figure), and S1026 (not shown in the figure). S1021, determine the compensation coefficient for the sulfur dioxide concentration above each spray layer based on the humidity of the monitoring probe surface above each spray layer.

[0042] In this embodiment, the compensation coefficient varies depending on the humidity level of the monitoring probe surface. Operators can pre-determine the compensation coefficient for different humidity levels; for example, the compensation coefficient could be 1.2 or other values ​​greater than 1. The correlation between different humidity levels and the corresponding compensation coefficient is determined and stored in the electronic device, allowing the device to find the corresponding compensation coefficient based on the humidity of the monitoring probe surface. Furthermore, operators can also install a heating wire on the monitoring probe surface to increase its temperature, thereby improving the evaporation of moisture and reducing the impact of excessively high humidity.

[0043] S1022, the sulfur dioxide concentration above each spray layer is compensated based on the compensation coefficient to obtain the compensated sulfur dioxide concentration.

[0044] In the embodiments of this application, after the electronic device finds the compensation coefficient corresponding to each monitoring probe, it multiplies the sulfur dioxide concentration collected by the monitoring probe above each spray layer by the corresponding compensation coefficient to obtain the compensated sulfur dioxide concentration, thereby making the sulfur dioxide concentration more accurate.

[0045] S1023, determine the concentration difference between the compensated sulfur dioxide concentration and the initial sulfur dioxide concentration at the same time point in each time interval.

[0046] In this embodiment, each spray layer within each time interval includes multiple collections of sulfur dioxide concentration. The initial sulfur dioxide concentration is also collected multiple times within each time interval, and the collection frequency of the initial sulfur dioxide concentration is consistent with that of the sulfur dioxide concentration corresponding to the spray layer. The electronic device subtracts the compensated sulfur dioxide concentration corresponding to each spray layer at the same time point from the initial sulfur dioxide concentration at the same time point to obtain the concentration difference value of each spray layer at the same time point. A larger concentration difference indicates a better desulfurization effect and higher desulfurization efficiency.

[0047] S1024, Determine the concentration difference variation function for each spray layer based on the concentration difference.

[0048] In this embodiment of the application, the electronic device maps the concentration difference of each spray layer in each time interval to a preset rectangular coordinate system and performs linear fitting to obtain the concentration difference change function of each spray layer in each time interval. The horizontal axis of the preset rectangular coordinate system is time, and the vertical axis is the concentration difference. The concentration difference change function characterizes the change in the desulfurization effect of each spray layer in each time interval.

[0049] S1025, determine the average concentration difference, minimum concentration difference, trend of concentration difference, and rate of change of concentration difference from the concentration difference change function.

[0050] In this embodiment, after determining the concentration difference variation function of each spray layer in each time interval, the electronic device can obtain the slope of the function. The sign of the slope represents the trend of concentration difference variation, and the magnitude of the slope represents the rate of concentration difference variation. The electronic device determines the average concentration difference in each time interval based on the concentration difference variation function of each spray layer, or it can calculate the average concentration difference based on the concentration difference of each spray layer in each time interval. The average concentration difference represents the overall desulfurization efficiency level of each spray layer in each time interval. The minimum concentration difference represents the difference between the worst desulfurization effect of each spray layer and the initial concentration.

[0051] S1026, the desulfurization efficiency value of each spray layer in each time interval is determined based on the average value of the concentration difference, the minimum value of the concentration difference, the trend of the concentration difference, and the rate of change of the concentration difference.

[0052] In the embodiments of this application, a larger average concentration difference indicates a higher desulfurization efficiency of the spray layer, and a larger minimum concentration difference also indicates a higher desulfurization efficiency. The trend and rate of change of the concentration difference also affect the desulfurization efficiency of each spray layer in each time interval. Therefore, the electronic device can accurately analyze the desulfurization efficiency value of each spray layer in each time interval by comprehensively analyzing the above four factors, including the average concentration difference.

[0053] One possible implementation of this application embodiment involves determining the desulfurization efficiency value of each spray layer within each time interval in step S1026 based on the average concentration difference, the minimum concentration difference, the concentration difference change trend, and the concentration difference change rate. This specifically includes steps one, two, three, and four. Step 1: Determine the candidate desulfurization efficiency value for each spray layer based on the average and minimum concentration difference values ​​of each spray layer.

[0054] In this embodiment, the operator can assign corresponding weights to the average and minimum concentration differences. For example, the weight of the average concentration difference is 0.7, and the weight of the minimum concentration difference is 0.3. The operator stores the assigned weights in the electronic device. The electronic device normalizes the average and minimum concentration differences of each spray layer in each time interval to obtain the corresponding normalized data. The electronic device then uses the corresponding weights to perform a weighted calculation on these normalized data to obtain the candidate desulfurization efficiency value for each spray layer in each time interval.

[0055] Step 2: Determine the efficiency correction value for each spray layer based on the importance weight of each spray layer and the rate of change of concentration difference.

[0056] In this embodiment, the importance of spray layers varies depending on their location. For example, lower spray layers require more sulfur dioxide removal from the flue gas, thus their importance is higher. The weight assigned to each spray layer to represent its importance decreases sequentially from bottom to top. The efficiency correction value for each spray layer is obtained by multiplying its corresponding weight by the rate of change of the concentration difference. This efficiency correction value is used to correct the candidate desulfurization efficiency value in step one.

[0057] Step 3: If there is a first spray layer where the rate of change of concentration difference is constant or increasing, then the sum of the candidate desulfurization efficiency value and the efficiency correction value of each first spray layer is used to obtain the desulfurization efficiency value.

[0058] In the embodiments of this application, if the rate of change of concentration difference is constant or increases, it indicates that the desulfurization efficiency of the spray layer is good. Therefore, the candidate desulfurization efficiency value of the first spray layer with a constant or increasing rate of change of concentration difference is added to the efficiency correction value to obtain a sum. This sum is the desulfurization efficiency value of each first spray layer in each time interval.

[0059] Step 4: If there is a second spray layer with a decreasing rate of change in concentration difference, the desulfurization efficiency value is obtained by determining the difference between the candidate desulfurization efficiency value and the efficiency correction value of each second spray layer.

[0060] In the embodiments of this application, a decreasing rate of change of concentration difference indicates that the desulfurization efficiency of the spray layer is poor and it cannot achieve good desulfurization of flue gas. Therefore, the difference is obtained by subtracting the efficiency correction value from the candidate desulfurization efficiency value of the second spray layer with a decreasing rate of change of concentration difference. This difference is the desulfurization efficiency value of each second spray layer in each time interval.

[0061] One possible implementation of this application embodiment is that, in step S103, the desulfurization quality value of the desulfurization tower in each time interval is determined based on the sulfur dioxide concentration of the flue gas above each spray layer in each time interval, the desulfurization efficiency value of each spray layer, and the initial sulfur dioxide concentration. Specifically, this includes steps S1031 (not shown in the figure), S1032 (not shown in the figure), S1033 (not shown in the figure), S1034 (not shown in the figure), S1035 (not shown in the figure), S1036 (not shown in the figure), and S1037 (not shown in the figure). S1031, determine the target sulfur dioxide concentration above the uppermost spray layer in each time interval, and calculate the average value of all target sulfur dioxide concentrations in each time interval to obtain the first target average value.

[0062] In this embodiment, the sulfur dioxide concentration above the uppermost spray layer is the final concentration of the flue gas after desulfurization treatment through all spray layers, i.e., the target sulfur dioxide concentration. This concentration characterizes the desulfurization quality of all spray layers, i.e., the entire desulfurization tower. The electronic equipment calculates the average value of all target sulfur dioxide concentrations in each time interval to obtain the first target average value. The first target average value characterizes the overall desulfurization effect of each time interval on the flue gas.

[0063] S1032, determine the second concentration difference between the average value of the first target and the average value of the second target.

[0064] The second target average value is the average value of all initial sulfur dioxide concentrations in each time interval.

[0065] In the embodiments of this application, the electronic device subtracts the first target average value from the second target average value for each time interval to obtain the second concentration difference value. The second concentration difference value characterizes the difference between the final sulfur dioxide concentration of the flue gas after desulfurization and the initial concentration in each time interval. The larger the second concentration difference value, the higher the overall desulfurization effect of the desulfurization tower.

[0066] S1033, the desulfurization efficiency value of each spray layer in each time interval is subtracted from the preset efficiency value corresponding to each spray layer to obtain a target desulfurization efficiency value that is lower than the preset efficiency value.

[0067] The preset efficiency value is the efficiency value when the desulfurization efficiency of each spray layer is qualified.

[0068] In this embodiment of the application, the minimum desulfurization efficiency required for each spray layer is different, and therefore the corresponding preset efficiency values ​​are different. The electronic device subtracts the corresponding preset efficiency value from the desulfurization efficiency value of each spray layer in each time interval, thereby determining the target desulfurization efficiency value when the desulfurization efficiency fails to meet the requirements in each time interval, that is, the spray layer corresponding to the target desulfurization efficiency value.

[0069] S1034, determine the total number of target desulfurization efficiency values, and determine the difference between each target desulfurization efficiency value and the corresponding preset efficiency value.

[0070] In this embodiment, the electronic device counts all target desulfurization efficiency values ​​to obtain the total number of target desulfurization efficiency values ​​in each time interval. A higher number indicates more spray layers with lower desulfurization efficiency, thus indicating a poorer overall desulfurization effect of the desulfurization tower. The electronic device subtracts the target desulfurization efficiency value from the preset efficiency value of the spray layers with low desulfurization efficiency to obtain a difference. This difference represents the gap between the spray layer and the acceptable desulfurization efficiency. A larger difference indicates a greater gap from the acceptable desulfurization level, thus indicating lower desulfurization quality.

[0071] S1035, determine the average sulfur dioxide concentration of each spray layer in each time interval, and determine the concentration reduction value of flue gas after passing through each spray layer based on the average sulfur dioxide concentration on both sides of each spray layer.

[0072] In this embodiment, the electronic device averages the sulfur dioxide concentration of each spray layer in each time interval to obtain an average sulfur dioxide concentration. This average value is used to characterize the overall sulfur dioxide concentration level of the flue gas after treatment by each spray layer in each time interval. Then, the electronic device subtracts the average sulfur dioxide concentration above each spray layer from the average sulfur dioxide concentration below each spray layer to obtain the concentration reduction value of the flue gas after passing through each spray layer. The larger the concentration reduction value, the better the desulfurization effect of the spray layer.

[0073] S1036, the desulfurization sub-mass value of each spray layer is determined based on the concentration reduction value of each spray layer and the desulfurization efficiency value of each spray layer.

[0074] In summary, for the embodiments of this application, the concentration reduction value and desulfurization efficiency value of each spray layer are key factors affecting the desulfurization quality of each spray layer. Therefore, the staff sets corresponding weights for the concentration reduction value and desulfurization efficiency value and stores them in the electronic device. The electronic device normalizes the concentration reduction value and desulfurization efficiency value of each spray layer to obtain normalized values. The electronic device calls the corresponding weights to perform weighted calculations on these two normalized values ​​to obtain the desulfurization sub-quality value of each spray layer.

[0075] S1037, based on the second concentration difference, the number of all target desulfurization efficiency values, the efficiency difference between each target desulfurization efficiency value and the corresponding preset efficiency value, and the desulfurization sub-mass value of each spray layer, determine the desulfurization quality value of the desulfurization tower in each time interval.

[0076] In summary, for the embodiments of this application, the above four factors, such as the second concentration difference and the number of all target desulfurization efficiency values, are key factors characterizing the overall desulfurization quality of the desulfurization tower in each time interval. Therefore, the electronic device can accurately determine the desulfurization quality value of the desulfurization tower in each time interval by comprehensively analyzing the above four factors.

[0077] One possible implementation of this application embodiment is that, in step S1037, the desulfurization quality value of the desulfurization tower in each time interval is determined based on the second concentration difference, the number of all target desulfurization efficiency values, the efficiency difference between each target desulfurization efficiency value and the corresponding preset efficiency value, and the desulfurization sub-quality value of each spray layer. Specifically, this includes steps Sa (not shown in the figure), Sb (not shown in the figure), Sc (not shown in the figure), Sd (not shown in the figure), and Se (not shown in the figure). Sa is the sum of the desulfurization sub-mass values ​​of all spray layers.

[0078] In the embodiments of this application, the electronic device sums the desulfurization sub-mass values ​​of all spray layers in each time interval to obtain the total desulfurization sub-mass value. This total value, to a certain extent, characterizes the overall desulfurization quality of all spray layers in each time interval. The larger the total desulfurization sub-mass value, the higher the desulfurization quality of the desulfurization tower.

[0079] Sb determines the efficiency deviation value of the spray layer corresponding to each target desulfurization efficiency value based on the weight of the spray layer corresponding to each target desulfurization efficiency value and the efficiency difference.

[0080] In this embodiment of the application, the electronic device multiplies the efficiency difference corresponding to each target desulfurization efficiency value by the weight of the spray layer corresponding to each target desulfurization efficiency value in step two to obtain the efficiency deviation value of the spray layer corresponding to each target desulfurization efficiency value. The larger the efficiency deviation value, the lower the desulfurization quality of the spray layer corresponding to the target desulfurization efficiency value.

[0081] Sc determines the sum of efficiency deviations of all target desulfurization efficiency values ​​corresponding to the spray layer.

[0082] In the embodiments of this application, the electronic device sums the efficiency deviations of the spray layer corresponding to all target desulfurization efficiency values ​​to obtain the total efficiency deviation. The larger the total efficiency deviation, the lower the overall desulfurization quality of the desulfurization tower.

[0083] Sd determines the outlier of the desulfurization tower based on the number of all target desulfurization efficiency values, the sum of efficiency deviations, and their respective weights.

[0084] In this embodiment, the number of all target desulfurization efficiency values ​​and the sum of efficiency deviations are key factors characterizing overall desulfurization anomalies in the desulfurization tower. Therefore, the staff assigns corresponding weights to the number of all target desulfurization efficiency values ​​and the sum of efficiency deviations, storing these weights in an electronic device. The electronic device normalizes both the number of all target desulfurization efficiency values ​​and the sum of efficiency deviations, and then uses the corresponding weights to perform a weighted calculation on the normalized data to obtain the desulfurization tower's anomaly value. A larger anomaly value indicates lower desulfurization quality in the desulfurization tower.

[0085] Se, based on the second concentration difference, the sum of desulfurization sub-mass values ​​and their respective weights, determines the desulfurization score of the desulfurization tower, and determines the ratio of the desulfurization score to the outlier.

[0086] The ratio represents the desulfurization quality value of the desulfurization tower in each time interval.

[0087] In this embodiment, the second concentration difference and the sum of desulfurization sub-mass values ​​are key factors characterizing the overall desulfurization quality of the desulfurization tower. Therefore, the operator assigns corresponding weights to the second concentration difference and the sum of desulfurization sub-mass values ​​and stores them in the electronic device. The electronic device normalizes the second concentration difference and the sum of desulfurization sub-mass values ​​respectively, and then uses the corresponding weights to perform a weighted calculation to obtain the desulfurization score of the desulfurization tower. A higher desulfurization score indicates higher desulfurization quality. Therefore, the electronic device divides the desulfurization score by the outlier values ​​in step Sd to obtain a ratio, with the desulfurization score as the numerator and the outlier values ​​as the denominator. A higher ratio indicates higher desulfurization quality in each time interval, thus representing the desulfurization quality value of the desulfurization tower in each time interval.

[0088] One possible implementation of this application embodiment is that step S104, which determines whether the desulfurization tower is operating abnormally based on the desulfurization quality values ​​of the desulfurization tower at multiple time intervals, specifically includes steps S1041 (not shown in the figure) and S1042 (not shown in the figure), wherein... S1041, Determine the trend and rate of change of desulfurization quality values ​​based on the desulfurization quality values ​​of the desulfurization tower at multiple time intervals.

[0089] In this embodiment, the electronic device maps the desulfurization quality values ​​of the desulfurization tower at multiple time intervals to a preset rectangular coordinate system. The horizontal axis of this preset rectangular coordinate system is each time interval, and the vertical axis is the desulfurization quality value. The electronic device then performs a linear fit on these scattered points to obtain a linear function. The electronic device determines the sign and magnitude of the slope of the linear function: a positive slope indicates that the desulfurization quality value gradually increases; a slope of 0 indicates that the desulfurization quality value remains unchanged; and a negative slope indicates that the desulfurization quality value gradually decreases. The magnitude of the slope characterizes the rate of change of the quality value.

[0090] S1042, if the quality value changes in a downward trend and the rate of change of the quality value reaches the preset rate threshold, then the desulfurization tower is determined to be operating abnormally.

[0091] In the embodiments of this application, if the electronic device determines that the quality value of the desulfurization tower is decreasing and the rate of change of the quality value reaches a preset rate threshold, it indicates that the desulfurization quality of the desulfurization tower is gradually declining and the rate of decline is too fast, thus indicating that the desulfurization tower is operating abnormally.

[0092] In one possible implementation of this application embodiment, after step S1036, steps S105 (not shown in the figure), S106 (not shown in the figure), S107 (not shown in the figure), and S108 (not shown in the figure) are further included, wherein, S105, determine the trend and rate of change of the desulfurization sub-mass value of each spray layer in multiple time intervals.

[0093] In the embodiments of this application, the electronic device can determine the desulfurization sub-mass value of each spray layer in multiple time intervals as described in step S1041, thereby obtaining the trend and rate of change of the desulfurization sub-mass value of each spray layer in the time span of multiple time intervals.

[0094] S106, determine the third target average value of the desulfurization sub-mass value for each spray layer over multiple time intervals.

[0095] In this embodiment of the application, the electronic device averages the desulfurization sub-mass values ​​of each spray layer over multiple time intervals to obtain a third target average value. The target average value characterizes the overall desulfurization quality level of each spray layer over multiple time intervals.

[0096] S107, the trend of the desulfurization sub-mass value change is determined to be a decreasing target spray layer, and the pressure increase value of the target spray layer is determined based on the change rate of the target spray layer and the third target average value.

[0097] In this embodiment, the electronic device selects the target spray layer from all spray layers whose desulfurization agent mass value shows a decreasing trend. This decreasing trend indicates that the desulfurization effect of the target spray layer is gradually deteriorating, thus requiring modification of its desulfurization performance. Each spray layer receives desulfurizing agent via a separate pressurization device such as a water pump. Therefore, increasing the pump pressure increases the amount of desulfurizing agent sprayed. Furthermore, if there are clogged nozzles, increasing the pump pressure can attempt to clear the blockage, thereby improving the desulfurization effect of the target spray layer. The rate of change of the target spray layer and the average value of the third target are both key factors affecting the water pump pressure regulation. Therefore, the staff can set corresponding weights for the rate of change and the average value of the third target and store them in the electronic device. The electronic device normalizes the rate of change and the average value of the third target respectively, and calls the corresponding weights to perform weighted calculation on the normalized data to obtain a value for calculating the pressure increase. The staff can preset a function to calculate the pressure increase value by obtaining the weighted value through experiments and calculations and store it in the electronic device. The electronic device can then input the weighted value into the function to obtain the pressure increase value for each target spray layer.

[0098] S108, control the pressurization equipment of the target spray layer to operate according to the pressure increase value.

[0099] In the embodiments of this application, the electronic device is connected to the pressurizing equipment such as the water pump of each spray layer via wires. After the electronic device determines the pressure increase value of each target spray layer, it outputs a control signal to the water pump of each target spray layer according to the corresponding pressure increase value, thereby causing the water pump of each target spray layer to operate according to the pressure increase value, thereby strengthening the output pressure and output amount of the desulfurizing agent and improving the desulfurization effect of the target spray layer.

[0100] The above embodiments describe a monitoring method for flue gas desulfurization and denitrification from the perspective of process flow. The following embodiments describe a monitoring system 20 for flue gas desulfurization and denitrification from the perspective of virtual modules or virtual units. For details, please refer to the following embodiments.

[0101] This application provides a monitoring system 20 for flue gas desulfurization and denitrification, such as... Figure 2 As shown, a monitoring system 20 for flue gas desulfurization and denitrification may specifically include: The data acquisition module 201 is used to acquire the sulfur dioxide concentration of flue gas collected by the monitoring probe above each spray layer, the humidity of the monitoring probe surface above each spray layer, and the initial sulfur dioxide concentration of flue gas entering the desulfurization tower at preset time intervals. The desulfurization efficiency determination module 202 is used to determine the desulfurization efficiency value of each spray layer in each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer, the humidity of the monitoring probe surface and the initial sulfur dioxide concentration. The desulfurization quality determination module 203 is used to determine the desulfurization quality value of the desulfurization tower in each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer in each time interval, the desulfurization efficiency value of each spray layer, and the initial sulfur dioxide concentration. The anomaly detection module 204 is used to determine whether the desulfurization tower is operating abnormally based on the desulfurization quality values ​​of the desulfurization tower at multiple time intervals.

[0102] This application discloses a flue gas desulfurization and denitrification monitoring system 20. The data acquisition module 201 acquires the sulfur dioxide concentration, humidity of the probe surface, and initial sulfur dioxide concentration of the flue gas collected by the monitoring probes above each spray layer. This facilitates subsequent analysis of the operation of each spray layer and the overall operation of the desulfurization tower. The sulfur dioxide concentration above each spray layer characterizes the specific performance of the spray layer in flue gas desulfurization. The humidity of the probe surface causes errors in the collected sulfur dioxide concentration; higher humidity means more soluble sulfur dioxide in water, leading to a lower sulfur dioxide concentration collected by the probes compared to the actual concentration. Therefore, the humidity of the probe surface is used to correct for sulfur dioxide levels later. The concentration and desulfurization efficiency determination module 202 combines the initial sulfur dioxide concentration, the sulfur dioxide concentration of the treated flue gas above each spray layer, and the humidity of the monitoring probe surface to determine the desulfurization efficiency value of each spray layer in each time interval more accurately. After obtaining the desulfurization efficiency value of the flue gas above each spray layer in each time interval, the desulfurization quality determination module 203 can accurately analyze the overall desulfurization quality value of the desulfurization tower in each time interval by combining the sulfur dioxide concentration above each spray layer in each time interval and the initial sulfur dioxide concentration. Finally, the anomaly judgment module 204 can accurately analyze whether the desulfurization tower is operating abnormally during the operation of the desulfurization tower in multiple time intervals based on the desulfurization quality value of the desulfurization tower in multiple time intervals.

[0103] In one possible implementation of this application embodiment, when the desulfurization efficiency determination module 202 determines the desulfurization efficiency value of each spray layer within each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer, the humidity of the monitoring probe surface, and the initial sulfur dioxide concentration, it is specifically used for: The compensation coefficient for the sulfur dioxide concentration above each spray layer is determined based on the humidity of the monitoring probe surface above each spray layer. The sulfur dioxide concentration above each spray layer is compensated based on the compensation coefficient to obtain the compensated sulfur dioxide concentration. Determine the concentration difference between the compensated sulfur dioxide concentration and the initial sulfur dioxide concentration at the same time point in each time interval; The concentration difference variation function for each spray layer is determined based on the concentration difference. The average concentration difference, minimum concentration difference, trend of concentration difference, and rate of change of concentration difference are determined from the concentration difference change function. The desulfurization efficiency value of each spray layer in each time interval is determined based on the average concentration difference, the minimum concentration difference, the trend of concentration difference, and the rate of change of concentration difference.

[0104] In one possible implementation of this application embodiment, when the desulfurization efficiency determination module 202 determines the desulfurization efficiency value of each spray layer within each time interval based on the average concentration difference, the minimum concentration difference, the concentration difference change trend, and the concentration difference change rate, it is specifically used for: The candidate desulfurization efficiency value for each spray layer is determined based on the average and minimum concentration difference values ​​of each spray layer. The efficiency correction value for each spray layer is determined based on the importance weight of each spray layer and the rate of change of the concentration difference; If there is a first spray layer where the rate of change of concentration difference is constant or increases, then the sum of the candidate desulfurization efficiency value and the efficiency correction value of each first spray layer is used to obtain the desulfurization efficiency value. If there is a second spray layer where the rate of change of concentration difference is decreasing, the desulfurization efficiency value is obtained by determining the difference between the candidate desulfurization efficiency value and the efficiency correction value of each second spray layer.

[0105] In one possible implementation of this application embodiment, when the desulfurization quality determination module 203 determines the desulfurization quality value of the desulfurization tower in each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer in each time interval, the desulfurization efficiency value of each spray layer, and the initial sulfur dioxide concentration, it is specifically used for: The target sulfur dioxide concentration above the uppermost spray layer is determined in each time interval, and the average value of all target sulfur dioxide concentrations in each time interval is calculated to obtain the first target average value. Determine a second concentration difference between the first target average value and the second target average value, where the second target average value is the average of all initial sulfur dioxide concentrations in each time interval; The desulfurization efficiency value of each spray layer in each time interval is subtracted from the preset efficiency value corresponding to each spray layer to obtain the target desulfurization efficiency value that is lower than the preset efficiency value. The preset efficiency value is the efficiency value when the desulfurization efficiency of each spray layer is qualified. Determine the total number of target desulfurization efficiency values, and determine the difference between each target desulfurization efficiency value and its corresponding preset efficiency value; Determine the average sulfur dioxide concentration of each spray layer in each time interval, and determine the concentration reduction of flue gas after passing through each spray layer based on the average sulfur dioxide concentration on both sides of each spray layer; The desulfurization sub-mass value of each spray layer is determined based on the concentration reduction value of each spray layer and the desulfurization efficiency value of each spray layer; The desulfurization quality value of the desulfurization tower in each time interval is determined based on the second concentration difference, the number of all target desulfurization efficiency values, the efficiency difference between each target desulfurization efficiency value and the corresponding preset efficiency value, and the desulfurization sub-quality value of each spray layer.

[0106] In one possible implementation of this application embodiment, when the desulfurization quality determination module 203 determines the desulfurization quality value of the desulfurization tower in each time interval based on the second concentration difference, the number of all target desulfurization efficiency values, the efficiency difference between each target desulfurization efficiency value and the corresponding preset efficiency value, and the desulfurization sub-quality value of each spray layer, it is specifically used for: The total desulfurization mass value of all spray layers is determined by the sum of the desulfurization mass values. The efficiency deviation value of the spray layer corresponding to each target desulfurization efficiency value is determined based on the weight of the spray layer corresponding to each target desulfurization efficiency value and the efficiency difference. Determine the sum of the efficiency deviations of all target desulfurization efficiency values ​​corresponding to the spray layer; The outliers of the desulfurization tower are determined based on the number of all target desulfurization efficiency values, the sum of efficiency deviations, and their respective weights. The desulfurization score of the desulfurization tower is determined based on the second concentration difference, the sum of the desulfurization sub-quality values, and their respective weights. The ratio of the desulfurization score to the outlier is determined, and the ratio represents the desulfurization quality value of the desulfurization tower in each time interval.

[0107] In one possible implementation of this application embodiment, when the anomaly judgment module 204 determines whether the desulfurization tower is operating abnormally based on the desulfurization quality values ​​of the desulfurization tower at multiple time intervals, it is specifically used for: The trend and rate of change of desulfurization quality values ​​are determined based on the desulfurization quality values ​​of the desulfurization tower at multiple time intervals. If the quality value changes in a downward trend and the rate of change reaches a preset threshold, then the desulfurization tower is considered to be operating abnormally.

[0108] In one possible implementation of this application, a flue gas desulfurization and denitrification monitoring system 20 further includes: The trend and rate determination module is used to determine the trend and rate of change of the desulfurization sub-mass value of each spray layer in multiple time intervals. The average value determination module is used to determine a third target average value of the desulfurization sub-mass value for each spray layer over multiple time intervals; The pressure value determination module is used to determine the target spray layer whose desulfurization sub-mass value changes with a decreasing trend, and to determine the pressure increase value of the target spray layer based on the rate of change of the target spray layer and the third target average value. The control module is used to control the pressurization equipment of the target spray layer to operate according to the pressure increase value.

[0109] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the flue gas desulfurization and denitrification monitoring system 20 described above can be referred to the corresponding process in the aforementioned method embodiments, and will not be repeated here.

[0110] This application provides an electronic device, such as... Figure 3 As shown, Figure 3 The illustrated electronic device 30 includes a processor 301 and a memory 303. The processor 301 and the memory 303 are connected, for example, via a bus 302. Optionally, the electronic device 30 may also include a transceiver 304. It should be noted that in practical applications, the transceiver 304 is not limited to one type, and the structure of this electronic device 30 does not constitute a limitation on the embodiments of this application.

[0111] Processor 301 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. Processor 301 may also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0112] Bus 302 may include a pathway for transmitting information between the aforementioned components. Bus 302 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Bus 302 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 3 The symbol is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0113] The memory 303 may be a ROM (Read Only Memory) or other type of static storage device capable of storing static information and instructions, RAM (Random Access Memory) or other type of dynamic storage device capable of storing information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), CD-ROM (Compact Disc Read Only Memory) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto.

[0114] The memory 303 is used to store application code that executes the solution of this application, and its execution is controlled by the processor 301. The processor 301 is used to execute the application code stored in the memory 303 to implement the content shown in the foregoing method embodiments.

[0115] Electronic devices include, but are not limited to: mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), and in-vehicle terminals (such as in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Servers can also be included. Figure 3 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0116] This application provides a computer-readable storage medium storing a computer program that, when run on a computer, enables the computer to execute the corresponding content in the aforementioned method embodiments. Compared with related technologies, the sulfur dioxide concentration collected by the monitoring probes above each spray layer, the humidity on the surface of the monitoring probes, and the initial sulfur dioxide concentration of the flue gas in this application embodiment facilitate subsequent analysis of the working status of each spray layer and the overall operation of the desulfurization tower. The sulfur dioxide concentration above each spray layer characterizes the specific performance of the spray layer in flue gas desulfurization. The humidity on the surface of the monitoring probes causes errors in the collected sulfur dioxide concentration; the higher the humidity, the more soluble sulfur dioxide is in water, resulting in the sulfur dioxide concentration collected by the monitoring probes being lower than the actual sulfur dioxide concentration. Therefore, the humidity on the surface of the monitoring probes is used to subsequently correct the sulfur dioxide concentration. Using sulfur concentration and initial sulfur dioxide concentration as initial inputs, combined with the sulfur dioxide concentration of the treated flue gas above each spray layer and the humidity of the monitoring probe surface, the desulfurization efficiency value of each spray layer in each time interval can be determined more accurately. After obtaining the desulfurization efficiency value of the flue gas above each spray layer in each time interval, the overall desulfurization quality value of the desulfurization tower in each time interval can be accurately analyzed by combining the sulfur dioxide concentration above each spray layer in each time interval and the initial sulfur dioxide concentration. Finally, based on the desulfurization quality values ​​of the desulfurization tower in multiple time intervals, it is possible to accurately analyze whether the desulfurization tower is operating abnormally during the operation of multiple time intervals.

[0117] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0118] The above are only some embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for monitoring flue gas desulfurization and denitrification, characterized in that, include: The sulfur dioxide concentration of flue gas collected by the monitoring probe above each spray layer, the humidity of the monitoring probe surface above each spray layer, and the initial sulfur dioxide concentration of flue gas entering the desulfurization tower are obtained at preset time intervals. The desulfurization efficiency value of each spray layer in each time interval is determined based on the sulfur dioxide concentration of the flue gas above each spray layer, the humidity of the monitoring probe surface, and the initial sulfur dioxide concentration. The desulfurization quality value of the desulfurization tower in each time interval is determined based on the sulfur dioxide concentration of the flue gas above each spray layer in each time interval, the desulfurization efficiency value of each spray layer, and the initial sulfur dioxide concentration. The desulfurization quality values ​​of the desulfurization tower at multiple time intervals are used to determine whether the desulfurization tower is operating abnormally.

2. The monitoring method for flue gas desulfurization and denitrification according to claim 1, characterized in that, The determination of the desulfurization efficiency value of each spray layer within each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer, the humidity of the monitoring probe surface, and the initial sulfur dioxide concentration includes: The compensation coefficient for the sulfur dioxide concentration above each spray layer is determined based on the humidity of the monitoring probe surface above each spray layer. The sulfur dioxide concentration above each spray layer is compensated based on the compensation coefficient to obtain the compensated sulfur dioxide concentration; Determine the concentration difference between the compensated sulfur dioxide concentration and the initial sulfur dioxide concentration at the same time point in each time interval; The concentration difference variation function for each spray layer is determined based on the concentration difference. The average concentration difference, minimum concentration difference, trend of concentration difference, and rate of change of concentration difference are determined from the concentration difference change function. The desulfurization efficiency value of each spray layer within each time interval is determined based on the average concentration difference, the minimum concentration difference, the trend of concentration difference change, and the rate of concentration difference change.

3. The monitoring method for flue gas desulfurization and denitrification according to claim 2, characterized in that, The determination of the desulfurization efficiency value of each spray layer within each time interval based on the average concentration difference, minimum concentration difference, concentration difference trend, and concentration difference rate of change includes: The candidate desulfurization efficiency value for each spray layer is determined based on the average and minimum concentration difference values ​​of each spray layer. The efficiency correction value for each spray layer is determined based on the importance weight of each spray layer and the rate of change of the concentration difference; If there is a first spray layer where the rate of change of concentration difference is constant or increases, then the sum of the candidate desulfurization efficiency value and the efficiency correction value of each first spray layer is used to obtain the desulfurization efficiency value. If there is a second spray layer where the rate of change of concentration difference is decreasing, the desulfurization efficiency value is obtained by determining the difference between the candidate desulfurization efficiency value and the efficiency correction value of each second spray layer.

4. The monitoring method for flue gas desulfurization and denitrification according to claim 1, characterized in that, The determination of the desulfurization quality value of the desulfurization tower in each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer in each time interval, the desulfurization efficiency value of each spray layer, and the initial sulfur dioxide concentration includes: The target sulfur dioxide concentration above the uppermost spray layer is determined in each time interval, and the average value of all target sulfur dioxide concentrations in each time interval is calculated to obtain the first target average value. Determine a second concentration difference between the first target average value and the second target average value, wherein the second target average value is the average of all initial sulfur dioxide concentrations in each time interval; The desulfurization efficiency value of each spray layer within each time interval is subtracted from the preset efficiency value corresponding to each spray layer to obtain a target desulfurization efficiency value that is lower than the preset efficiency value. The preset efficiency value is the efficiency value when the desulfurization efficiency of each spray layer is qualified. Determine the total number of target desulfurization efficiency values, and determine the difference between each target desulfurization efficiency value and its corresponding preset efficiency value; Determine the average sulfur dioxide concentration of each spray layer in each time interval, and determine the concentration reduction of flue gas after passing through each spray layer based on the average sulfur dioxide concentration on both sides of each spray layer; The desulfurization sub-mass value of each spray layer is determined based on the concentration reduction value of each spray layer and the desulfurization efficiency value of each spray layer; The desulfurization quality value of the desulfurization tower in each time interval is determined based on the second concentration difference, the number of all target desulfurization efficiency values, the efficiency difference between each target desulfurization efficiency value and the corresponding preset efficiency value, and the desulfurization sub-quality value of each spray layer.

5. The monitoring method for flue gas desulfurization and denitrification according to claim 4, characterized in that, The determination of the desulfurization quality value of the desulfurization tower in each time interval based on the second concentration difference, the number of all target desulfurization efficiency values, the efficiency difference between each target desulfurization efficiency value and the corresponding preset efficiency value, and the desulfurization sub-quality value of each spray layer includes: The total desulfurization mass value of all spray layers is determined by the sum of the desulfurization mass values. The efficiency deviation value of the spray layer corresponding to each target desulfurization efficiency value is determined based on the weight of the spray layer corresponding to each target desulfurization efficiency value and the efficiency difference. Determine the sum of the efficiency deviations of all target desulfurization efficiency values ​​corresponding to the spray layer; The outliers of the desulfurization tower are determined based on the number of all target desulfurization efficiency values, the sum of efficiency deviations, and their respective weights. The desulfurization score of the desulfurization tower is determined based on the second concentration difference, the sum of the desulfurization sub-quality values, and their respective weights. The ratio of the desulfurization score to the outlier is then determined, and the ratio represents the desulfurization quality value of the desulfurization tower in each time interval.

6. The monitoring method for flue gas desulfurization and denitrification according to claim 1, characterized in that, The method of determining whether the desulfurization tower is operating abnormally based on the desulfurization quality values ​​of the desulfurization tower at multiple time intervals includes: The trend and rate of change of desulfurization quality values ​​are determined based on the desulfurization quality values ​​of the desulfurization towers at the multiple time intervals. If the quality value changes in a downward trend and the rate of change of the quality value reaches a preset rate threshold, then the desulfurization tower is determined to be operating abnormally.

7. The monitoring method for flue gas desulfurization and denitrification according to claim 1, characterized in that, The method further includes: Determine the trend and rate of change of the desulfurization sub-mass value for each spray layer during the multiple time intervals; Determine a third target average value of the desulfurization sub-mass value for each spray layer during the plurality of time intervals; The trend of the desulfurization sub-mass value change was determined to be a decreasing target spray layer, and the pressure increase value of the target spray layer was determined based on the change rate of the target spray layer and the third target average value. The pressurization equipment controlling the target spray layer operates according to the pressure increase value.

8. A monitoring system for flue gas desulfurization and denitrification, characterized in that, include: The data acquisition module is used to acquire the sulfur dioxide concentration of flue gas collected by the monitoring probe above each spray layer, the humidity of the monitoring probe surface above each spray layer, and the initial sulfur dioxide concentration of flue gas entering the desulfurization tower at preset time intervals. The desulfurization efficiency determination module is used to determine the desulfurization efficiency value of each spray layer in each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer, the humidity of the monitoring probe surface, and the initial sulfur dioxide concentration. The desulfurization quality determination module is used to determine the desulfurization quality value of the desulfurization tower in each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer in each time interval, the desulfurization efficiency value of each spray layer, and the initial sulfur dioxide concentration. The anomaly detection module is used to determine whether the desulfurization tower is operating abnormally based on the desulfurization quality values ​​of the desulfurization tower at multiple time intervals.

9. A monitoring system for flue gas desulfurization and denitrification according to claim 8, characterized in that, The desulfurization efficiency determination module, when determining the desulfurization efficiency value of each spray layer within each time interval based on the sulfur dioxide concentration of the flue gas above each spray layer, the humidity on the surface of the monitoring probe, and the initial sulfur dioxide concentration, is specifically used for: The compensation coefficient for the sulfur dioxide concentration above each spray layer is determined based on the humidity of the monitoring probe surface above each spray layer. The sulfur dioxide concentration above each spray layer is compensated based on the compensation coefficient to obtain the compensated sulfur dioxide concentration; Determine the concentration difference between the compensated sulfur dioxide concentration and the initial sulfur dioxide concentration at the same time point in each time interval; The concentration difference variation function for each spray layer is determined based on the concentration difference. The average concentration difference, minimum concentration difference, trend of concentration difference, and rate of change of concentration difference are determined from the concentration difference change function. The desulfurization efficiency value of each spray layer within each time interval is determined based on the average concentration difference, the minimum concentration difference, the trend of concentration difference change, and the rate of concentration difference change.

10. A monitoring system for flue gas desulfurization and denitrification according to claim 9, characterized in that, When determining the desulfurization efficiency value of each spray layer within each time interval based on the average concentration difference, minimum concentration difference, concentration difference trend, and concentration difference rate of change, the desulfurization efficiency determination module is specifically used for: The candidate desulfurization efficiency value for each spray layer is determined based on the average and minimum concentration difference values ​​of each spray layer. The efficiency correction value for each spray layer is determined based on the importance weight of each spray layer and the rate of change of the concentration difference; If there is a first spray layer where the rate of change of concentration difference is constant or increases, then the sum of the candidate desulfurization efficiency value and the efficiency correction value of each first spray layer is used to obtain the desulfurization efficiency value. If there is a second spray layer where the rate of change of concentration difference is decreasing, the desulfurization efficiency value is obtained by determining the difference between the candidate desulfurization efficiency value and the efficiency correction value of each second spray layer.

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