System and method for monitoring running state of steam soot blower of thermal power plant

Abstract

The invention discloses a thermal power plant steam soot blower operation state monitoring system and method, and aims to solve the problems of alarm failure and untimely alarm in the prior art. In the system, an image acquisition unit is used for acquiring a motion state image of a steam soot blower body in real time; the temperature sensor is used for detecting the working temperature of the steam soot blower in real time; the image processing unit is connected with the image acquisition unit and is used for analyzing and calculating the real-time turning rate of the steam soot blower according to the motion state image; the control unit is used for calculating the target turning rate of the steam soot blower according to the working temperature of the steam soot blower and judging the jamming state of the steam soot blower according to the real-time turning rate and the target turning rate; and the alarm unit executes alarm operation according to the jamming state. Through an image acquisition mode, the trial steering rate is calculated according to the motion state image, the jamming state of the steam soot blower is accurately judged, and alarm operation is executed in time.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power plant boiler equipment monitoring, and in particular to a thermal power plant steam soot blower operating status monitoring system and method. Background Art

[0002] At present, sootblowers in thermal power plants are important equipment for blowing soot and cleaning the heating surfaces of boilers. They provide regular sootblowing during normal operation of the boiler to ensure that uneven heating or local overheating caused by soot accumulation and coking on the heating surfaces is avoided.

[0003] Overheating of the heating surface tube wall can cause serious accidents such as tube bursts and leaks. Without considering the tube wall material and welding process, under normal boiler operation, the main causes of tube bursts are the following two: 1. Localized overheating of the heating surface; 2. Sootblower jamming, resulting from prolonged steam sootblowing on a specific heating surface.

[0004] To resolve sootblower jamming, thermal power plants currently employ two main fault diagnosis methods: one is current alarm, which quickly responds to excessive current after a jam and issues an alarm. The other is time alarm, which determines if the sootblower has timed out and then issues a jam alarm.

[0005] At present, these two methods have the problem of current alarm failure when the soot blower is stuck, and the alarm is delayed, resulting in overblowing of the heating surface, which causes damage to the heating surface. Summary of the Invention

[0006] (1) Purpose of the invention

[0007] The purpose of the present invention is to provide a system and method for monitoring the operating status of a steam soot blower in a thermal power plant, aiming to solve the problems of alarm failure and untimely alarm in the prior art.

[0008] (2) Technical solution

[0009] To solve the above problems, a first aspect of the present invention provides a thermal power plant steam soot blower operation status monitoring system, comprising an image acquisition unit, a steam soot blower, a temperature sensor, an image processing unit, a control unit and an alarm unit;

[0010] The image acquisition unit is used to obtain the motion state image of the steam sootblower body in real time;

[0011] The temperature sensor is used to detect the working temperature of the steam soot blower in real time;

[0012] The image processing unit is connected to the image acquisition unit and is used to calculate the real-time turning rate of the steam sootblower based on the motion state image analysis;

[0013] The control unit is configured to calculate a target turning rate of the steam soot blower according to the operating temperature of the steam soot blower, and determine a stuck state of the steam soot blower according to the real-time turning rate and the target turning rate;

[0014] The alarm unit performs an alarm operation according to the stuck state.

[0015] Preferably, the system further includes a vibration sensor, which is arranged on the steam soot blower and connected to the control unit. The vibration sensor is used to collect vibration spectrum characteristics of the steam soot blower, and the control unit verifies the stuck state of the steam soot blower based on the vibration spectrum characteristics.

[0016] Preferably, the system further includes a current sensor, which is electrically connected to the motor of the steam soot blower and connected to the control unit. The current sensor is used to collect current parameters of the steam soot blower, and the control unit verifies the stuck state of the steam soot blower based on the current parameters.

[0017] Preferably, the image acquisition unit is a 5G high-definition camera, the shooting area of ​​the 5G high-definition camera covers the movement trajectory of the steam soot blower, and a reflective mark is provided on the steam soot blower, and the reflective mark is used by the 5G high-definition camera to identify the real-time position of the steam soot blower.

[0018] According to another aspect of the present invention, a method for monitoring the operating status of a steam soot blower in a thermal power plant is provided, comprising:

[0019] Collect the working temperature of steam soot blower;

[0020] Calculate the target turning rate of the steam sootblower based on the operating temperature;

[0021] Collect the motion state image of the steam soot blower and analyze the real-time turning rate of the steam soot blower based on the motion state image;

[0022] Determine the stuck state of the steam soot blower based on the target turning rate and the real-time turning rate;

[0023] Execute alarm operation according to the jam status.

[0024] Preferably, calculating the target turning rate of the steam sootblower according to the operating temperature includes:

[0025] When the operating temperature is less than T1, the target turning rate is calculated as V1;

[0026] When T1≤operating temperature<T2, the target turning rate is calculated as V2;

[0027] When T2≤operating temperature, the target turning rate is calculated as V3;

[0028] Wherein T1 and T2 are preset temperature thresholds, V1<V2<V3.

[0029] Preferably, collecting the motion state image of the steam soot blower and analyzing the real-time turning rate of the steam soot blower according to the motion state image includes:

[0030] Collect the motion state image of the steam soot blower, which is equipped with a reflective mark;

[0031] Perform inter-frame difference processing on the motion state image to identify the position change of the reflective mark and calculate the angular displacement of the reflective mark;

[0032] The real-time turning rate is calculated based on the angular displacement of the reflective mark and the time taken for the position change.

[0033] Preferably, determining the stuck state of the steam soot blower according to the target turning rate and the real-time turning rate includes:

[0034] Calculate the deviation rate between the target turning rate and the real-time turning rate;

[0035] When the deviation rate is less than 5%, the output is normal;

[0036] When 5%≤deviation rate<10%, the output is slightly stuck;

[0037] When 10%≤deviation rate<20%, ​​the output is in a moderate jam state;

[0038] When 20% ≤ deviation rate, the output is in a serious jam state.

[0039] Preferably, the performing of an alarm operation according to the stuck state includes:

[0040] When the output is slightly stuck, a level 1 alarm signal is triggered to prompt the operator to pay attention to monitoring;

[0041] When the output is in a moderate jam state, a secondary alarm signal is triggered to control the target turning rate of the steam soot blower and prompt the operator to pay attention to monitoring;

[0042] When the output is in a serious jam state, a level 3 alarm signal is triggered, the steam soot blower is stopped and the steam supply is cut off.

[0043] Preferably, the method further comprises:

[0044] Collect vibration spectrum characteristics and / or current parameters of the current steam sootblower;

[0045] Verify the stuck state of the steam soot blower based on the vibration spectrum characteristics and / or current parameters.

[0046] (3) Beneficial effects

[0047] The above technical solution of the present invention has the following beneficial technical effects:

[0048] 1. A temperature sensor is installed in the system. Based on the actual temperature of the steam sootblower's operating environment, the target turning rate is determined. This target turning rate serves as a reference for determining whether the steam sootblower is stuck. The image acquisition unit captures images of the steam sootblower's motion state, and the image processing unit analyzes and calculates the steam sootblower's real-time turning rate, thereby accurately determining whether the steam sootblower is stuck.

[0049] 2. The target turning rate is determined based on the real-time temperature. When the temperature is low, a low target turning rate can ensure the sootblowing effect of the steam sootblower. When the temperature is high, the steam sootblower increases the target turning rate to reduce the sootblowing time at local locations, avoiding significant local temperature differences on the boiler heating surface that may cause damage to the boiler. In addition, the target turning rate is automatically switched based on the real-time temperature to improve system operating efficiency without manual intervention, ensuring precise control of the system.

[0050] 3. Execute corresponding alarm operations according to the jamming status of the steam soot blower, maintain the continuous and stable operation of the system within the acceptable jamming range, and according to different alarm information, operation and maintenance personnel can respond and deal with measures in time to improve maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 This is a schematic diagram of a steam soot blower operating status monitoring system for a thermal power plant provided by the present invention;

[0052] Figure 2 is a schematic diagram of a system arrangement according to one embodiment of the present invention;

[0053] Figure 3 This is a flow chart of a method for monitoring the operating status of a steam soot blower in a thermal power plant provided by the present invention;

[0054] Figure 4 is a schematic flow chart of determining a real-time turning rate in a monitoring method provided by the present invention;

[0055] Figure 5 It is a schematic flow chart of verifying the stuck state in the monitoring method provided by the present invention. DETAILED DESCRIPTION

[0056] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0057] The accompanying drawings illustrate schematic diagrams of layer structures according to embodiments of the present invention. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes, relative sizes, and positional relationships of the various regions and layers shown in the figures are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions based on actual needs.

[0058] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0059] Combine Figure 1 and Figure 2 A first aspect of the present invention provides an operating status monitoring system for a steam soot blower in a thermal power plant, comprising an image acquisition unit, a steam soot blower, a temperature sensor, an image processing unit, a control unit and an alarm unit; the image acquisition unit is used to obtain a motion state image of the steam soot blower body in real time; the temperature sensor is used to detect the working temperature of the steam soot blower in real time; the image processing unit is connected to the image acquisition unit, and is used to calculate the real-time turning rate of the steam soot blower based on the motion state image analysis; the control unit is used to calculate the target turning rate of the steam soot blower according to the working temperature of the steam soot blower, and judge the stuck state of the steam soot blower according to the real-time turning rate and the target turning rate; the alarm unit performs an alarm operation according to the stuck state.

[0060] Specifically, a temperature sensor is set in the system to determine the target turning rate of the steam soot blower according to the real-time temperature of the actual working environment of the steam soot blower. The target turning rate can be used as a reference for judging whether the steam soot blower is stuck. During the operation of the system, the air outlet of the steam soot blower, that is, the air outlet, needs to rotate continuously to achieve uniform soot blowing on the heating surface of the boiler of the thermal power plant. During this period, when the steam soot blower is aimed at a local position of the heating surface, it will cause the temperature of the local position to drop. The temperature drop of the local position being blown is related to the current ambient temperature. If the ambient temperature is low, the temperature drop of the local position being blown is relatively small. At this time, the target turning rate of the steam soot blower can be reduced, that is, the steam soot blower is rotated slower. In one rotation cycle, the soot blowing time for the same local position can be appropriately longer; on the contrary, when the working environment temperature is high, the steam soot blower needs to rotate faster to avoid excessive local temperature differences that cause uneven heating of the boiler and damage.

[0061] The image acquisition unit obtains the motion state diagram of the steam soot blower, and the image processing unit analyzes and calculates the real-time steering rate of the steam soot blower, thereby accurately determining the stuck state of the steam soot blower. The target steering rate is determined according to the real-time temperature. When the temperature is low, the low target steering rate can ensure the soot blowing effect of the steam soot blower. When the temperature is high, the steam soot blower increases the target steering rate to reduce the soot blowing time at local locations, avoiding significant local temperature differences on the boiler heating surface, which may cause damage to the boiler. In addition, the target steering rate is automatically switched according to the real-time temperature to improve the system's operating efficiency without manual intervention, ensuring precise control of the system. According to the stuck state of the steam soot blower, the corresponding alarm operation is executed to maintain the continuous and stable operation of the system within the acceptable stuck range. According to different alarm information, the operation and maintenance personnel can respond and handle the measures in a timely manner to improve maintenance efficiency.

[0062] It should be noted that the specific installation location and method of each unit and component in the system near the boiler of the thermal power plant are not limited here. It is sufficient to meet the above functions and perform sootblowing on the boiler. Among them, the temperature detected by the temperature sensor can reflect the current sootblowing demand of the boiler. The temperature detected here can be the actual temperature of the collected boiler; it can also be used to determine the current temperature of the boiler through the detected temperature. For example, the temperature sensor is set on the steam sootblower. The steam sootblower maintains a certain distance from the boiler during operation. According to the temperature difference between the two, the temperature sensor can directly detect the temperature at the steam sootblower, establish the relationship between the real-time temperature at this time and the sootblowing demand of the boiler, and thus determine the target turning rate of the steam sootblower. The specific calculation method and steps for determining the target turning rate based on temperature are also not limited here. According to the actual situation of the power plant, the mapping relationship between the real-time temperature at different locations and the target turning rate of the steam sootblower can be verified through actual conditions. This mapping relationship can be input into the value control unit in advance. When the system is running, the control unit can determine the target turning rate of the steam sootblower under different temperature environments based on this mapping relationship.

[0063] In a preferred case, the system also includes a vibration sensor, which is arranged on the steam soot blower and connected to the control unit. The vibration sensor is used to collect vibration spectrum characteristics of the steam soot blower, and the control unit verifies the stuck state of the steam soot blower based on the vibration spectrum characteristics.

[0064] Specifically, a vibration sensor can be installed on the motor housing of the steam sootblower. When the steam sootblower is operating normally, the motor vibration is relatively stable. When the steam sootblower is stuck, the vibration spectrum characteristics collected by the vibration sensor will vary depending on the degree of the sticking. The vibration spectrum characteristics of the steam sootblower collected by the vibration sensor can be used to determine the current stuck state of the steam sootblower. The stuck state obtained from the vibration spectrum characteristics can then be verified.

[0065] Through such a setting, the stuck state of the steam soot blower can be monitored simultaneously through the motion state image and vibration information. During the operation of the system, the image acquisition unit may miss or be blocked. For example, if the steam is too large, the image acquisition unit may be unable to obtain the motion state image of the steam soot blower for a short time. At this time, the steam soot blower may be mistakenly judged to be in a stuck state. The current stuck state can be verified by the vibration sensor, thereby improving the accuracy of the monitoring results.

[0066] In a preferred case, the system further includes a current sensor, which is electrically connected to the motor of the steam soot blower and connected to the control unit. The current sensor is used to collect current parameters of the steam soot blower, and the control unit verifies the stuck state of the steam soot blower based on the current parameters.

[0067] Specifically, a current sensor can be connected in series to the power supply circuit of the steam sootblower motor to monitor current parameters, such as the current fluctuation amplitude. When the steam sootblower is stuck, the motor torque increases, causing the current to rise. The current fluctuation amplitude can be used to determine the jam state of the steam sootblower. The jam state of the steam sootblower is determined by using three data sources as references: image, vibration, and current. During the judgment process, when any of the three data sources outputs a steam sootblower jam signal, a verification is triggered, and the remaining two data sources perform a jam state determination. When all three data sources simultaneously output a steam sootblower jam signal, an alarm operation is executed.

[0068] This setup further improves the accuracy of system monitoring results, reduces the probability of misjudgment, and ensures continuous and stable boiler operation. Furthermore, by configuring the results reported by three data sources, if one source consistently reports inconsistent results with the other two, it can be inferred that this source is abnormal, prompting maintenance personnel to inspect and repair the component, achieving a mutual detection effect, saving maintenance costs, and improving maintenance efficiency.

[0069] It should be noted that the specific method of obtaining the motion state image of the steam sootblower body by the image acquisition unit is not limited here. Figure 2 As shown, in a preferred case, the image acquisition unit is a 5G high-definition camera, the shooting area of ​​the 5G high-definition camera covers the movement trajectory of the steam soot blower, and a reflective mark is provided on the steam soot blower, and the reflective mark is used by the 5G high-definition camera to identify the real-time position of the steam soot blower.

[0070] Specifically, reflective markings are placed on the steam sootblower to enhance image recognition by reflecting light. A camera captures the reflective marking's displacement, and an image processing unit calculates the angle change to derive the real-time turning rate. The 5G high-definition camera captures the steam sootblower's motion trajectory, utilizing the 5G network to transmit high-definition images at high speed.

[0071] Through such a setting, the use of 5G high-definition cameras can monitor the actual operation of the steam soot blower in real time, promptly determine the jamming status of the steam soot blower, and execute the alarm operation at the first time, thereby improving the efficiency and authenticity of the monitoring results.

[0072] It should be noted that there is no limit on the number of steam sootblowers. Multiple steam sootblowers can be installed based on the needs of the thermal power plant boiler. When multiple steam sootblowers are installed, a single high-definition camera can be used to simultaneously monitor all of them. Optionally, a backup steam sootblower can be installed. If the current steam sootblower fails, the control unit can promptly activate the backup steam sootblower to ensure effective sootblowing on the boiler heating surface and maintain continuous and stable operation of the boiler.

[0073] Combine Figures 3 to 5 According to another aspect of the present invention, a method for monitoring the operating status of a steam soot blower in a thermal power plant is provided, comprising:

[0074] Collect the working temperature of steam soot blower;

[0075] Calculate the target turning rate of the steam sootblower based on the operating temperature;

[0076] Collect the motion state image of the steam soot blower and analyze the real-time turning rate of the steam soot blower based on the motion state image;

[0077] Determine the stuck state of the steam soot blower based on the target turning rate and the real-time turning rate;

[0078] Execute alarm operation according to the jam status.

[0079] This control method allows for more accurate judgment of steam sootblower jam conditions based on the target and real-time steering rates. By correlating the target steering rate with the sootblower's operating temperature and controlling the target steering rate based on different operating environments, it ensures effective sootblowing and prevents uneven boiler heating. It also prevents unnecessary rapid rotation of the sootblower, saving energy. By analyzing the sootblower's real-time steering rate using images of its motion, the actual rotation of the sootblower can be accurately and timely determined, providing precise data support for jam detection.

[0080] It should be noted that the specific relationship between the operating temperature and the target turning rate of the steam soot blower is not limited here. It can be a linear dynamic relationship, with the control unit dynamically controlling the target turning rate in combination with changes in the operating temperature. Alternatively, a temperature threshold can be set to determine the target turning rate based on different operating temperature ranges. In a preferred embodiment, calculating the target turning rate of the steam soot blower based on the operating temperature includes:

[0081] When the operating temperature is less than T1, the target turning rate is calculated as V1;

[0082] When T1≤operating temperature<T2, the target turning rate is calculated as V2;

[0083] When T2≤operating temperature, the target turning rate is calculated as V3;

[0084] Wherein T1 and T2 are preset temperature thresholds, V1<V2<V3.

[0085] Specifically, temperature thresholds T1 and T2 are preset in the system, and the target turning rate of the steam soot blower is determined according to the current operating temperature range, so that the soot blowing effect of the steam soot blower meets the soot blowing requirements of the boiler at the current temperature, while avoiding obvious temperature differences on the heating surface of the boiler, which may cause damage to the boiler structure.

[0086] Through this control method, the temperature threshold is preset, and the target steering rate of the steam sootblower matches different temperature ranges. Under the condition of meeting the sootblowing requirements of the boiler, the control process is simplified and the system response speed is improved, thereby ensuring the sootblowing effect and the continuous and stable operation of the system.

[0087] It should be noted that the specific values ​​of T1, T2, V1, V2 and V3 are not limited here. T1 and T2 are set according to the location of the temperature sensor and the specific parameters of the thermal power plant. V1, V2 and V3 are set according to the parameters of the steam soot blower itself and the soot blowing requirements of the thermal power plant. V1, V2 and V3 can be the linear displacement speed or angular displacement speed calculated according to the specific rotation of the steam soot blower, which can correspond to the collected motion state image and set the corresponding calculation method. In one embodiment, the temperature sensor is set on the steam soot blower, T1 = 100 ° C, T2 = 200 ° C, V1, V2 and V3 are angular displacement speeds, where V1 = 10 ° / s, V2 = 20 ° / s, V3 = 40 ° / s. When the working temperature detected by the temperature sensor is lower than 100℃, it means that the heating surface of the boiler is in a low-temperature working state. At this time, the target turning rate of the steam soot blower is determined to be a low-speed deflection of 10° / s. The soot blowing time of the steam soot blower on the same local position of the boiler heating surface is relatively long. However, due to the low temperature of the heating surface, there will be no problem of excessive temperature difference on the local heating surface of the boiler, thereby ensuring the soot blowing effect while reducing the working pressure of the steam soot blower. When the working temperature detected by the temperature sensor is between 100℃ and 200℃, it means that the boiler is The heating surface is in a medium-temperature working state. At this time, the target turning rate of the steam soot blower is determined to be a medium-speed deflection of 20° / s, which reduces the time of continuous soot blowing by the steam soot blower on the local heating surface of the boiler and avoids excessive temperature difference on the heating surface. When the operating temperature detected by the temperature sensor is above 200°C, it means that the heating surface of the boiler is in a high-temperature working state. At this time, the target turning rate of the steam soot blower is determined to be a high-speed deflection of 40° / s, which further reduces the time of continuous soot blowing by the steam soot blower on the local heating surface of the boiler and avoids excessive temperature difference on the heating surface.

[0088] In a preferred case, the target turning rate and the real-time turning rate are both angular velocities, and collecting a motion state image of the steam soot blower and analyzing the real-time turning rate of the steam soot blower according to the motion state image include:

[0089] Collect the motion state image of the steam soot blower, which is equipped with a reflective mark;

[0090] Perform inter-frame difference processing on the motion state image to identify the position change of the reflective mark and calculate the angular displacement of the reflective mark;

[0091] The real-time turning rate is calculated based on the angular displacement of the reflective mark and the time taken for the position change.

[0092] Specifically, the frame rate P of the image acquisition unit is set to, for example, 30 fps. The image processing unit selects two motion images, calculates the position change of the reflective marker based on the two motion images, and then calculates the angular displacement of the reflective marker based on the position change. The real-time steering rate of the steam sootblower is calculated by combining the angular displacement and the time difference between the two motion images. The time difference here is related to the interval between the two motion images. Taking the frame rate P = 30 fps as an example, the time difference between two adjacent motion images can be 1 / 30 s. Assuming that the calculated angular displacement of the reflective marker during this period is ω1 in degrees, the real-time steering rate of the steam sootblower is ω1*1 / 30 in degrees per second. Alternatively, the time difference between two spaced motion images can be n / 30 s, where n is the number of images between the two motion images. This can be adaptively set based on system operating requirements. Assuming that the calculated angular displacement of the reflective marker during this period is ω2 in degrees, the real-time steering rate of the steam sootblower is ω2*n / 30 in degrees per second.

[0093] Through this control method, a fixed frame rate is set to capture motion state images, and the interval time between motion state images is precisely controlled. Through the 5G high-definition camera, the position changes of reflective signs can be clearly and accurately identified, thereby ensuring the accuracy of calculating the real-time turning rate.

[0094] In a preferred embodiment, determining the stuck state of the steam sootblower according to the target turning rate and the real-time turning rate includes:

[0095] Calculate the deviation rate between the target turning rate and the real-time turning rate;

[0096] When the deviation rate is less than 5%, the output is normal;

[0097] When 5%≤deviation rate<10%, the output is slightly stuck;

[0098] When 10%≤deviation rate<20%, ​​the output is in a moderate jam state;

[0099] When 20% ≤ deviation rate, the output is in a serious jam state.

[0100] Specifically, the deviation rate = (target steering rate - real-time steering rate) / target steering rate × 100%. Based on the range of the deviation rate, whether the current steam sootblower operating status is normal is determined. When a jam occurs, that is, when the real-time steering rate is less than the target steering rate, the degree of jam is determined.

[0101] Through this control method, refined operation and maintenance can be achieved. According to the different degrees of jamming of the steam soot blower, the actual operation status of the steam soot blower can be accurately judged, and different response measures can be taken to improve operation and maintenance efficiency.

[0102] In a preferred embodiment, performing an alarm operation according to a stuck state includes:

[0103] When the output is slightly stuck, a level 1 alarm signal is triggered to prompt the operator to pay attention to monitoring;

[0104] When the output is in a moderate jam state, a secondary alarm signal is triggered to control the target turning rate of the steam soot blower and prompt the operator to pay attention to monitoring;

[0105] When the output is in a serious jam state, a level 3 alarm signal is triggered, the steam soot blower is stopped and the steam supply is cut off.

[0106] Specifically, when the steam soot blower is slightly stuck, the control unit controls the alarm unit to trigger a first-level alarm signal, such as lighting a light or popping up a window on the operation interface to alert the operator to the current slight jam. When the steam soot blower is moderately stuck, a second-level alarm signal is triggered, such as flashing a light or popping up an operation interface, requesting manual access. At this time, the control unit increases the target turning rate of the steam soot blower, thereby accelerating the real-time turning rate of the steam soot blower. According to the above judgment method, the adjusted deviation rate is dynamically observed. When the deviation rate decreases, it indicates that the adjusted target turning rate can meet the current working requirements and maintain the system operation. When the deviation rate does not decrease or even increases, it is determined that the steam soot blower is stuck and cannot meet the current working requirements. At this time, the control unit automatically stops operation and prompts the operator to intervene for maintenance, or starts a backup steam soot blower to maintain operation. When the steam soot blower is seriously stuck, a third-level alarm signal is triggered. At this time, a third-level alarm signal is triggered, such as a ringing alarm, a flashing section, and other warning information. The control unit stops the scale soot blower operation and cuts off the steam supply.

[0107] Through this control method, when the steam soot blower is in a normal or slightly stuck state, the stable operation of the system will not be affected, and the overall work efficiency of the thermal power plant will be improved; in a moderately stuck state, by adjusting the target turning rate, a self-cleaning effect will be achieved. Increasing the turning rate can alleviate the stuck state under certain circumstances, which is conducive to the continuous operation of the system. Combined with dynamic judgment, it can further ensure whether the steam soot blower can meet the current work requirements; in a serious stuck state, the operation will be directly cut off to prevent poor soot blowing effect from affecting the overall operation of the thermal power plant and avoid damage to the boiler heating surface.

[0108] In optional scenarios, the system can further determine whether the deviation rate is less than zero, thereby determining the steam sootblower's operating condition. This can also trigger a general warning signal, prompting maintenance personnel to inspect the steam sootblower. For example, if the deviation rate is less than zero, the steam sootblower may have an internal short circuit or loose mechanical connections, which are detrimental to long-term, efficient operation. Timely inspection of the steam sootblower's operating condition is necessary to eliminate adverse factors and improve system safety.

[0109] In a preferred embodiment, the method further comprises:

[0110] Collect vibration spectrum characteristics and / or current parameters of the current steam sootblower;

[0111] Verify the stuck state of the steam soot blower based on the vibration spectrum characteristics and / or current parameters.

[0112] Specifically, the steering of the steam soot blower requires a motor and current to drive it. There is a mapping relationship between its different steering rates and the vibration spectrum characteristics and current parameters. The mapping relationship is preset in the control unit. When the steam soot blower is running, the vibration spectrum characteristics and current parameters are used to verify whether the stuck state of the steam soot blower is accurate.

[0113] It should be noted that the conditions for triggering the alarm signal are not limited to verification conditions. The alarm signal can be triggered when one or two of the deviation rate, vibration spectrum characteristics, and current parameters are abnormal. Alternatively, the alarm signal can be triggered when all three of them are abnormal after mutual verification. In a preferred embodiment, when the deviation rate, vibration spectrum characteristics, and current parameters all indicate that the steam sootblowers are stuck in the current state after verification, the alarm signal corresponding to the stuck state is triggered.

[0114] Through such a control method, during the judgment process, when any of the three data sources outputs a steam soot blower jam signal, it is possible that the data source has failed. For example, the camera is blocked by steam, resulting in the loss of a short-term motion state image and a misjudgment; or the steam soot blower is loose, resulting in inaccurate vibration spectrum characteristics collected by the vibration sensor. At this time, the data source is triggered to be verified, such as increasing the time interval between the two collected motion state images for verification. If the data source is always inconsistent with the judgment results of the other two data sources, an inaccurate prompt for the data source is output. The remaining two data sources make a jam state judgment and prompt the operation and maintenance personnel to perform maintenance during the operation interval of the thermal power plant. When the three data sources synchronously output a steam soot blower jam signal, the current jam state is verified and the corresponding alarm operation is executed.

[0115] It should be understood that the above-described specific embodiments of the present invention are merely illustrative or illustrative of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the scope of protection of the present invention. In addition, the appended claims are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A thermal power plant steam soot blower operating status monitoring system, characterized in that: The system includes an image acquisition unit, a steam soot blower, a temperature sensor, an image processing unit, a control unit and an alarm unit; The image acquisition unit is used to obtain the motion state image of the steam sootblower body in real time; The temperature sensor is used to detect the working temperature of the steam soot blower in real time; The image processing unit is connected to the image acquisition unit and is used to calculate the real-time turning rate of the steam sootblower based on the motion state image analysis; The control unit is configured to calculate a target turning rate of the steam soot blower according to the operating temperature of the steam soot blower, and determine a stuck state of the steam soot blower according to the real-time turning rate and the target turning rate; The alarm unit performs an alarm operation according to the stuck state.

2. The system according to claim 1, wherein: The system further includes a vibration sensor, which is disposed on the steam soot blower and connected to the control unit. The vibration sensor is used to collect vibration spectrum characteristics of the steam soot blower, and the control unit verifies the stuck state of the steam soot blower based on the vibration spectrum characteristics.

3. The system according to claim 2, characterized in that The system further includes a current sensor, which is electrically connected to the motor of the steam soot blower and connected to the control unit. The current sensor is used to collect current parameters of the steam soot blower, and the control unit verifies the stuck state of the steam soot blower based on the current parameters.

4. The system according to claim 1, wherein: The image acquisition unit is a 5G high-definition camera, the shooting area of ​​the 5G high-definition camera covers the movement trajectory of the steam soot blower, and a reflective mark is provided on the steam soot blower, and the reflective mark is used by the 5G high-definition camera to identify the real-time position of the steam soot blower.

5. A method for monitoring the operating status of a steam soot blower in a thermal power plant, characterized in that: The method comprises: Collect the working temperature of steam soot blower; Calculate the target turning rate of the steam sootblower based on the operating temperature; Collect the motion state image of the steam soot blower and analyze the real-time turning rate of the steam soot blower based on the motion state image; Determine the stuck state of the steam soot blower based on the target turning rate and the real-time turning rate; Execute alarm operation according to the jam status.

6. The method according to claim 5, characterized in that Calculating the target turning rate of the steam sootblower according to the operating temperature includes: When the operating temperature is less than T1, the target turning rate is calculated as V1; When T1≤operating temperature<T2, the target turning rate is calculated as V2; When T2≤operating temperature, the target turning rate is calculated as V3; Wherein T1 and T2 are preset temperature thresholds, V1<V2<V3.

7. The method according to claim 6, characterized in that The collecting of the motion state image of the steam soot blower and analyzing the real-time turning rate of the steam soot blower according to the motion state image comprises: Collect the motion state image of the steam soot blower, which is equipped with a reflective mark; Perform inter-frame difference processing on the motion state image to identify the position change of the reflective mark and calculate the angular displacement of the reflective mark; The real-time turning rate is calculated based on the angular displacement of the reflective mark and the time taken for the position change.

8. The method according to claim 7, characterized in that Determining the stuck state of the steam sootblower according to the target turning rate and the real-time turning rate includes: Calculate the deviation rate between the target turning rate and the real-time turning rate; When the deviation rate is less than 5%, the output is normal; When 5%≤deviation rate<10%, the output is slightly stuck; When 10%≤deviation rate<20%, ​​the output is in a moderate jam state; When 20% ≤ deviation rate, the output is in serious jam state.

9. The method according to claim 8, characterized in that The alarm operation according to the stuck state includes: When the output is slightly stuck, a level 1 alarm signal is triggered to prompt the operator to pay attention to monitoring; When the output is in a moderate jam state, a secondary alarm signal is triggered to control the target turning rate of the steam soot blower and prompt the operator to pay attention to monitoring; When the output is in a serious jam state, a level 3 alarm signal is triggered, the steam soot blower is stopped and the steam supply is cut off.

10. The method according to claim 5, characterized in that The method further comprises: Collect vibration spectrum characteristics and / or current parameters of the current steam sootblower; Verify the stuck state of the steam soot blower based on the vibration spectrum characteristics and / or current parameters.

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