Air pre-heater safety monitoring method and device, electronic equipment and medium

Abstract

The invention provides an air pre-heater safety monitoring method and device, electronic equipment and a medium, and relates to the technical field of electric power engineering. The air pre-heater safety monitoring method comprises the steps that the first temperature of a smoke side outlet and the second temperature of a secondary air side outlet of an air pre-heater are collected; according to the first temperature, the second temperature and the temperature difference between the first temperature and the second temperature, whether the air pre-heater is in an overheating state or not is judged; and if the air pre-heater is in the overheating state, an emergency protection mechanism is triggered. Through the technical scheme provided by the invention, the problem of low safety monitoring accuracy of the air pre-heater in related technologies is solved, the safety monitoring accuracy of the air pre-heater is improved, and reliable guarantee is provided for safe operation of the air pre-heater.

Description

Technical Field

[0001] The present disclosure relates to the field of electric power engineering, and in particular to an air preheater safety monitoring method, device, electronic equipment and medium. Background Art

[0002] In thermal power plants, fires often occur inside the air preheater of the power station boiler during cold start or startup after hot standby due to the deposition of fuel oil contaminants. In order to detect the hot spots of the air preheater where the temperature increases, a large number of temperature sensors are deployed for detection. When the temperature is too high, an alarm is issued. However, due to the harsh environment inside the air preheater, the hot spots are difficult to detect, and there is a problem of low accuracy in the safety monitoring of the air preheater. Summary of the invention

[0003] The present disclosure provides an air preheater safety monitoring method, device, electronic device and medium to solve the problem of low accuracy of air preheater safety monitoring in related technologies. By collecting the temperature of the flue gas outlet and the wind outlet of the air preheater, multiple conditions of temperature abnormality are used to judge whether the air preheater is overheated. The accuracy of the air preheater safety monitoring is improved, providing reliable guarantee for the safe operation of the air preheater.

[0004] A first aspect of the present disclosure provides an air preheater safety monitoring method, the method comprising:

[0005] Collect the first temperature of the flue gas outlet and the second temperature of the secondary air outlet of the air preheater;

[0006] Judging whether the air preheater is in an overheating state according to the first temperature, the second temperature and the temperature difference between the first temperature and the second temperature;

[0007] If the air preheater is overheated, the emergency protection mechanism will be triggered.

[0008] In one embodiment of the present disclosure, collecting a first temperature of a flue gas outlet and a second temperature of a secondary air outlet of an air preheater includes:

[0009] At a first moment, a first temperature set of the flue gas outlet is collected, and a maximum value in the first temperature set is taken as the first temperature;

[0010] At the second moment, the second temperature set of the secondary air side outlet is collected, and the maximum value in the second temperature set is taken as the second temperature, wherein the time from the first moment to the second moment is the time for the rotor of the air preheater to rotate from the flue gas side outlet to the secondary air side outlet at a preset speed.

[0011] In one embodiment of the present disclosure, judging whether the air preheater is in an overheating state according to the first temperature, the second temperature, and the temperature difference between the second temperature and the second temperature includes:

[0012] Setting a first temperature greater than or equal to a first threshold as a first condition;

[0013] Setting the second temperature greater than or equal to the second threshold as a second condition;

[0014] Setting the temperature difference to be less than or equal to a third threshold as a third condition;

[0015] Calculating temperature confidence based on a first acquisition position of a first temperature and a second acquisition position of a second temperature;

[0016] Setting the temperature confidence level greater than a fourth threshold as a fourth condition;

[0017] It is determined whether the first temperature, the second temperature and the temperature difference simultaneously satisfy the first condition, the second condition, the third condition and the fourth condition. If so, the air preheater is in an overheated state.

[0018] In one embodiment of the present disclosure, calculating temperature confidence based on a first acquisition position of a first temperature and a second acquisition position of a second temperature includes:

[0019] Acquire a first acquisition position of a first temperature;

[0020] Acquire a second acquisition position of a second temperature;

[0021] Calculating the relative distance between the first acquisition position and the second acquisition position;

[0022] The temperature confidence level is determined based on the inverse of the relative distance.

[0023] In one embodiment of the present disclosure, before collecting the first temperature of the flue gas outlet and the second temperature of the secondary air outlet of the air preheater, the method further includes:

[0024] A first thermocouple array is arranged at the flue gas outlet side, and a first temperature set is collected by the first thermocouple array;

[0025] A second thermocouple array is arranged on the secondary air outlet side, and the second temperature set is collected by the second thermocouple array, wherein the first thermocouple array and the second thermocouple array are radially distributed from the rotor center of the air preheater to the grille edge.

[0026] In one embodiment of the present disclosure, if the air preheater is in an overheating state, an emergency protection mechanism is triggered, including:

[0027] Control the air preheater to close the inlet and outlet smoke and wind damper doors and stop the operation of the supply and exhaust fans;

[0028] The display screen that controls the air preheater displays the system fault corresponding to the overheating state and alarms.

[0029] The second aspect of the present disclosure provides an air preheater safety monitoring device, the device comprising:

[0030] A collection module, used for collecting a first temperature of a flue gas outlet and a second temperature of a secondary air outlet of an air preheater;

[0031] A judgment module, used for judging whether the air preheater is in an overheating state according to the first temperature, the second temperature and the temperature difference between the first temperature and the second temperature;

[0032] The protection module is used to trigger the emergency protection mechanism if the air preheater is in an overheating state.

[0033] The third aspect embodiment of the present disclosure proposes an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute any one of the methods in the first aspect embodiment of the present disclosure.

[0034] The fourth aspect embodiment of the present disclosure proposes a non-transitory computer-readable storage medium storing computer instructions, characterized in that the computer instructions are used to enable a computer to execute the method in the first aspect embodiment of the present disclosure.

[0035] The fifth aspect embodiment of the present disclosure proposes a computer program product, characterized in that it includes a computer program, and when the computer program is executed by a processor, it implements any method in the first aspect embodiment of the present disclosure.

[0036] In summary, according to the air preheater safety monitoring method proposed in the present disclosure, the first temperature of the flue gas side outlet of the air preheater and the second temperature of the secondary air side outlet are collected, providing temperature data that can be used to judge the safety status of the air preheater; according to the first temperature, the second temperature and the temperature difference between the first temperature and the second temperature, it is judged whether the air preheater is in an overheating state, and the working state of the air preheater is judged; if the air preheater is in an overheating state, the emergency protection mechanism is triggered, and the monitoring and protection of the overheating state of the air preheater are realized. The accuracy of the safety monitoring of the air preheater is improved, and a reliable guarantee is provided for the safe operation of the air preheater.

[0037] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description are used to explain the principles of the present disclosure, and do not constitute improper limitations on the present disclosure.

[0039] Figure 1A flow chart of an air preheater safety monitoring method according to an embodiment of the present disclosure;

[0040] Figure 2 This is a flow chart of collecting a first temperature at a flue gas outlet and a second temperature at a secondary air outlet of an air preheater according to an embodiment of the present disclosure;

[0041] Figure 3 It is a flow chart of an embodiment of the present disclosure for judging whether an air preheater is in an overheating state according to a first temperature, a second temperature, and a temperature difference between the second temperature and the second temperature;

[0042] Figure 4 A flowchart of calculating temperature confidence based on a first acquisition position of a first temperature and a second acquisition position of a second temperature according to an embodiment of the present disclosure;

[0043] Figure 5 A flowchart of setting a thermocouple array for collecting a first temperature set and a second temperature set according to an embodiment of the present disclosure;

[0044] Figure 6 This is a flow chart of an air preheater in an embodiment of the present disclosure that triggers an emergency protection mechanism when the air preheater is in an overheating state;

[0045] Figure 7 It is a structural schematic diagram of an air preheater safety monitoring device according to an embodiment of the present disclosure;

[0046] Figure 8 is a block diagram of an electronic device for implementing the air preheater safety monitoring method disclosed in the present invention according to an exemplary embodiment;

[0047] Fig. 9 It is a schematic diagram of the structure of the chip of the embodiment of the present disclosure. DETAILED DESCRIPTION

[0048] Embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout identify the same or similar originals or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0049] First, a brief introduction to the relevant terms in this disclosure is given:

[0050] Air preheater: In this disclosure, it refers to an air preheater, a device used to improve the heat exchange performance of the boiler and reduce heat loss. It is mainly divided into tubular air preheaters, rotary air preheaters, and plate air preheaters. The air preheater in this disclosure is a rotary air preheater. Its main function is to transfer the heat carried by the flue gas discharged from the tail flue of the boiler to the air before entering the boiler, thereby preheating the air and improving the combustion efficiency.

[0051] Thermocouple: In this disclosure, it refers to a temperature sensor, which is mainly used to measure temperature and convert it into electromotive force, and is widely used in fields such as temperature monitoring and control systems.

[0052] The hot spot monitoring system of the air preheater of the power station boiler is an indispensable device for monitoring whether there are fire hazards inside the air preheater and ensuring the safe, economical and reliable operation of the unit. A large number of simulation experiments and fire scene data show that most air preheater fires often occur during cold start-up and start-up after hot standby. These fires are caused by incomplete combustion of fuel oil, which results in the condensation and accumulation of incompletely burned fuel oil on the parts of the air preheater. When the temperature of the flue gas entering the air preheater increases, the deposited fuel oil contaminants are baked and hardened. When a certain temperature condition is reached, these fuel oil contaminants can be ignited, causing a fire.

[0053] The method proposed in the present disclosure is applied to the task of air preheater safety monitoring and can be widely used in multiple fields and scenarios, mainly including thermal power plants, industrial boilers, chemical production, aerospace, and energy management systems. In thermal power plants and industrial boilers, by monitoring the temperature of the flue gas side outlet and the secondary air side outlet, it is possible to effectively determine whether the equipment is in an overheating state, thereby ensuring safe operation. In chemical production, temperature monitoring helps prevent equipment from overheating and improves production safety. In the aerospace field, similar monitoring methods can be used for temperature control of engines and other key components to ensure flight safety. In addition, in intelligent energy management systems, real-time monitoring of equipment temperature can optimize energy efficiency and respond to potential safety hazards in a timely manner. Its application has a wealth of scenarios, and the application scenarios are not limited in the embodiments of the present disclosure.

[0054] The air preheater safety monitoring method provided by the present invention is introduced in detail below with reference to the accompanying drawings.

[0055] Figure 1 Flow chart of a method for monitoring air preheater safety according to an embodiment of the present disclosure. This method can be executed in a controller of an air preheater monitoring device. Figure 1 In the embodiment shown, the air preheater safety monitoring method includes:

[0056] Step 101, collecting a first temperature of a flue gas outlet and a second temperature of a secondary air outlet of an air preheater.

[0057] In this embodiment, the flue gas side outlet refers to the outlet where the flue gas releases heat and reduces its temperature after passing through the air preheater. The flue gas carries a large amount of heat when entering the air preheater, and transfers the heat to the air entering the boiler through the heat exchange element. The secondary air side outlet refers to the outlet of preheated air, which is usually used for secondary air in the combustion process. Secondary air refers to the additional air introduced in addition to the main fuel and primary air during the combustion process to ensure full combustion of the fuel and improve combustion efficiency. The first temperature is the temperature value collected at the flue gas side outlet of the air preheater, and the second temperature is the temperature value collected at the secondary air side outlet of the air preheater. In order to achieve safety monitoring of the air preheater, first, it is necessary to collect the first temperature of the flue gas side outlet of the air preheater and the second temperature of the secondary air side outlet as temperature data for judging the safety status of the air preheater.

[0058] Step 102: Determine whether the air preheater is in an overheating state according to the first temperature, the second temperature and the temperature difference between the first temperature and the second temperature.

[0059] In this embodiment, based on the first temperature, the second temperature and the temperature difference between the first temperature and the second temperature as the data to be processed, by judging whether it meets the overheating abnormality of the air preheater working state, an assessment of the safety state of the air preheater is provided.

[0060] Step 103: If the air preheater is in an overheating state, the emergency protection mechanism is triggered.

[0061] In this embodiment, if the air preheater is overheated, it means that there are one or more hot spots in the air preheater and combustion may have occurred. In this way, the emergency protection mechanism is triggered, the air preheater is controlled to stop working, and safety measures such as fire extinguishing are implemented.

[0062] In summary, according to the air preheater safety monitoring method proposed in the present disclosure, the first temperature of the flue gas side outlet of the air preheater and the second temperature of the secondary air side outlet are collected, providing temperature data that can be used to judge the safety status of the air preheater; according to the first temperature, the second temperature and the temperature difference between the first temperature and the second temperature, it is judged whether the air preheater is in an overheating state, and the working state of the air preheater is judged; if the air preheater is in an overheating state, the emergency protection mechanism is triggered, and the monitoring and protection of the overheating state of the air preheater are realized. The accuracy of the safety monitoring of the air preheater is improved, and a reliable guarantee is provided for the safe operation of the air preheater.

[0063] Figure 2 This is a flow chart of collecting the first temperature of the flue gas side outlet and the second temperature of the secondary air side outlet of an air preheater according to an embodiment of the present disclosure. Figure 2 Yes Figure 1 Further explanation of step 101 is based on Figure 2 The embodiment shown comprises the following steps:

[0064] Step 201 , at a first moment, a first temperature set at a smoke side outlet is collected, and a maximum value in the first temperature set is taken as a first temperature.

[0065] In this embodiment, the first moment is a time value, representing the moment when the first temperature of the flue gas outlet of the preheater is collected. The first temperature is the temperature of the suspected hot spot at the flue gas outlet. At the first moment, a first temperature set formed by several temperatures of the flue gas outlet is collected, and the highest temperature value in the first temperature set is taken as the first temperature.

[0066] Step 202, at the second moment, collect the second temperature set of the secondary air side outlet, and take the maximum value in the second temperature set as the second temperature, wherein the time from the first moment to the second moment is the time it takes for the rotor of the air preheater to rotate from the flue gas side outlet to the secondary air side outlet at a preset speed.

[0067] In this embodiment, the second moment is similar to the first moment, and is also a time value, representing the moment when the second temperature of the secondary air side outlet of the preheater is collected. The second temperature is the temperature of the suspected hot spot at the secondary air side outlet. At the second moment, a second temperature set formed by several temperatures of the secondary air side outlet is collected, and the highest temperature value in the second temperature set is used as the second temperature. In the air preheater, the rotor rotates continuously at a preset speed to ensure that the high-temperature flue gas passes through the grille of the air preheater and preheats the air. The second moment is the moment when the rotor rotates from the flue gas side outlet to the secondary air side outlet at a preset speed from the first moment. Thereby ensuring that the measured temperature is the temperature of the heat of the same part of the air at the top and bottom of the air preheater.

[0068] In this embodiment, the maximum temperature of the flue gas side outlet is used as the first temperature, and the maximum temperature of the secondary air side outlet is used as the second temperature, which ensures the reliability of the collected temperature data. At the same time, the reliability of the temperature data is further improved through the time length from the first moment to the second moment, providing a reliable data source for judging the working status of the air preheater.

[0069] Figure 3 This is a flow chart of an embodiment of the present disclosure for determining whether an air preheater is in an overheating state based on a first temperature, a second temperature, and a temperature difference between the second temperature and the second temperature. Figure 3 Yes Figure 1 Further explanation of step 102 is based on Figure 3 The embodiment shown comprises the following steps:

[0070] Step 301: setting a first temperature greater than or equal to a first threshold as a first condition.

[0071] In this embodiment, the first threshold is a temperature value used to measure the first temperature. The first condition refers to the first judgment condition for judging whether the air preheater is in an overheated state. The first condition is that the first temperature is greater than or equal to the first threshold, indicating that the temperature of the flue gas side outlet is overheated.

[0072] Step 302: setting the second temperature being greater than or equal to the second threshold as a second condition.

[0073] In this embodiment, the second threshold is a temperature value used to measure the second temperature. The second condition refers to the second judgment condition for judging whether the air preheater is in an overheated state. The second condition is that the second temperature is greater than or equal to the second threshold, indicating that the temperature of the secondary air side outlet is overheated.

[0074] Step 303: setting the temperature difference being less than or equal to a third threshold as a third condition.

[0075] In this embodiment, the third threshold is a temperature value used to measure the temperature difference between the first temperature and the second temperature. The third condition refers to the third judgment condition for judging whether the air preheater is in an overheated state. The third condition is that the temperature difference is greater than or equal to the third threshold, indicating that the temperature difference between the flue gas side outlet and the secondary air side outlet is large.

[0076] Step 304 : Calculate the temperature confidence based on the first acquisition position of the first temperature and the second acquisition position of the second temperature.

[0077] In this embodiment, the first acquisition position is the detection position a of the sensor for collecting the first temperature, and the second acquisition position is the detection position b of the sensor for collecting the second temperature. Temperature confidence refers to the credibility of the position with high temperature detected in the preheater. With the rotating shaft of the preheater as the center, the coordinates of the first acquisition position are a(x1, y1). When the grid position of the preheater corresponding to the first acquisition position rotates from the first moment t1 to the second moment t2 through the preset speed v, the detection position of the temperature sensor at the grid position of the preheater is b(x2, y2). The temperature confidence is:

[0078]

[0079] Here, 1e-6 is a parameter set to avoid division by 0.

[0080] Step 305: setting the temperature confidence level being greater than a fourth threshold as a fourth condition.

[0081] In this embodiment, the fourth threshold is a numerical value used to measure the temperature confidence. The fourth condition is that the temperature confidence is greater than the fourth threshold, indicating that after the first temperature collection point of the preheater rotates from t1 to t2, the distance between the collection point and the temperature collection point of the highest temperature at the other end of the preheater is close. The closer the position on the opposite side corresponding to the first collection position after rotation is to the second collection position, the higher the temperature confidence. Otherwise, the lower the temperature confidence.

[0082] Step 306, determining whether the first temperature, the second temperature and the temperature difference satisfy the first condition, the second condition, the third condition and the fourth condition at the same time, if so, the air preheater is in an overheating state.

[0083] In this embodiment, the first condition, the second condition, the third condition and the fourth condition are combined as the overall judgment condition. The first temperature, the second temperature and the temperature difference between the two are used as the input of the overall judgment condition to determine whether the four conditions are met at the same time. If they are met at the same time, it indicates that the air preheater is in an overheated state.

[0084] In this embodiment, through the construction of the four judgment conditions, the overheating condition of the air preheater is accurately evaluated, which helps to timely warn and handle the overheating condition, thereby improving the accuracy and reliability of air preheater safety monitoring.

[0085] Figure 4 The present invention is a flowchart of calculating temperature confidence based on a first acquisition position of a first temperature and a second acquisition position of a second temperature according to an embodiment of the present invention. Figure 4 Yes Figure 3 The specific description of step 304 is based on Figure 4 The embodiment shown comprises the following steps:

[0086] Step 401: Acquire a first acquisition position of a first temperature.

[0087] In this embodiment, the collection point of the first temperature, that is, the first collection position, is obtained from the monitoring and control system of the air preheater.

[0088] Step 402: Acquire a second acquisition position of a second temperature.

[0089] In this embodiment, the collection point of the second temperature, that is, the second collection position, is obtained from the monitoring and control system of the air preheater.

[0090] Step 403: Calculate the relative distance between the first acquisition position and the second acquisition position.

[0091] In this embodiment, the relative distance between the first acquisition position and the second acquisition position is calculated. For example, the first acquisition position is a(x1, y1), the second acquisition position is b(x2, y2), and the relative distance is

[0092] Step 404, determining the temperature confidence level according to the inverse of the relative distance.

[0093] In this embodiment, based on the relative distance d, the temperature confidence can be constructed according to the inverse of the relative distance. For example, the temperature confidence is:

[0094]

[0095] In this embodiment, by comparing the positions of the first temperature collection point and the second temperature collection point, it is reflected whether the positions of over-high temperature are concentrated in the same area, which provides information reflecting the reliability of data for the alarm of the overheating area or fire area of ​​the air preheater.

[0096] Figure 5 The present invention provides a flowchart of setting up a thermocouple array for collecting a first temperature set and a second temperature set according to an embodiment of the present disclosure. Figure 5 Yes Figure 1 The specific instructions before step 101 are based on Figure 5 The embodiment shown comprises the following steps:

[0097] Step 501: a first thermocouple array is arranged at the flue gas outlet side, and a first temperature set is collected by the first thermocouple array.

[0098] In this embodiment, the first thermocouple array refers to a plurality of thermocouple sensors that collect the first temperature set. The first thermocouple array is radially deployed along the center of the rotor toward the edge of the grille at the flue gas outlet.

[0099] Step 502, a second thermocouple array is set at the secondary air outlet, and the second temperature set is collected by the second thermocouple array, wherein the first thermocouple array and the second thermocouple array are radially distributed from the rotor center of the air preheater to the grille edge.

[0100] In this embodiment, the second thermocouple array refers to a plurality of thermocouple sensors that collect the second temperature set. A second thermocouple array is set at the secondary air outlet. The second thermocouple array is arranged similarly to the second thermocouple array. The second thermocouple array is radially deployed from the secondary air outlet along the rotor center to the grille edge. It ensures that a large amount of temperature data is collected, provides more data for temperature data judgment, and helps to improve the reliability of the data source.

[0101] Figure 6 This is a flow chart of an emergency protection mechanism triggered when an air preheater is in an overheating state according to an embodiment of the present disclosure. Figure 6 Yes Figure 1 The specific description of step 103 is based on Figure 6The embodiment shown comprises the following steps:

[0102] Step 601, control the air preheater to close the inlet and outlet smoke and wind damper doors and stop the operation of the supply and exhaust fans.

[0103] In this embodiment, after the monitoring and control module of the air preheater detects an overheating state, the emergency protection mechanism is triggered to control the air preheater to close the inlet and outlet smoke and wind baffle doors and stop the operation of the supply and exhaust fans to minimize economic losses.

[0104] Step 602, controlling the display screen of the air preheater to display the system fault corresponding to the overheating state and alarm.

[0105] In this embodiment, the display screen of the monitoring device that controls the air preheater displays that the air preheater has detected an overheating state. At the same time, the system fault corresponding to the overheating state is displayed and an alarm is issued to alert the staff, so that the power plant staff can promptly identify the fault area and handle it.

[0106] The present disclosure proposes a method for monitoring the safety of an air preheater. By collecting the first temperature of the flue gas outlet and the second temperature of the secondary air outlet of the air preheater, temperature data that can be used to judge the safety status of the air preheater are provided. According to the first temperature, the second temperature and the temperature difference between the first temperature and the second temperature, it is judged whether the air preheater is in an overheating state, and the working state of the air preheater is judged. If the air preheater is in an overheating state, the emergency protection mechanism is triggered, and the monitoring and protection of the overheating state of the air preheater are realized. The accuracy of the safety monitoring of the air preheater is improved, and a reliable guarantee is provided for the safe operation of the air preheater.

[0107] Corresponding to the methods provided in the above-mentioned embodiments, the present disclosure also provides an air preheater safety monitoring device. Since the device provided in the embodiments of the present disclosure corresponds to the methods provided in the above-mentioned embodiments, the implementation method of the method is also applicable to the device provided in this embodiment and will not be described in detail in this embodiment.

[0108] Figure 7 FIG. 7 is a schematic diagram of the structure of an air preheater safety monitoring device 700 according to an embodiment of the present disclosure. Figure 7 As shown, the air preheater safety monitoring device includes:

[0109] A collection module 710 is used to collect a first temperature of a flue gas outlet and a second temperature of a secondary air outlet of an air preheater;

[0110] A judgment module 720, configured to judge whether the air preheater is in an overheating state according to the first temperature, the second temperature and the temperature difference between the first temperature and the second temperature;

[0111] The protection module 730 is used to trigger the emergency protection mechanism if the air preheater is in an overheating state.

[0112] In some embodiments, the acquisition module 710 is used to:

[0113] At a first moment, a first temperature set of the flue gas outlet is collected, and a maximum value in the first temperature set is taken as the first temperature;

[0114] At the second moment, the second temperature set of the secondary air side outlet is collected, and the maximum value in the second temperature set is taken as the second temperature, wherein the time from the first moment to the second moment is the time for the rotor of the air preheater to rotate from the flue gas side outlet to the secondary air side outlet at a preset speed.

[0115] In some embodiments, the determination module 720 is used to:

[0116] Setting a first temperature greater than or equal to a first threshold as a first condition;

[0117] Setting the second temperature greater than or equal to the second threshold as a second condition;

[0118] Setting the temperature difference to be less than or equal to a third threshold as a third condition;

[0119] Calculating temperature confidence based on a first acquisition position of a first temperature and a second acquisition position of a second temperature;

[0120] Setting the temperature confidence level greater than a fourth threshold as a fourth condition;

[0121] It is determined whether the first temperature, the second temperature and the temperature difference simultaneously satisfy the first condition, the second condition, the third condition and the fourth condition. If so, the air preheater is in an overheated state.

[0122] In some embodiments, the determination module 720 calculates the temperature confidence based on the first acquisition position of the first temperature and the second acquisition position of the second temperature in the following manner:

[0123] Acquire a first acquisition position of a first temperature;

[0124] Acquire a second acquisition position of a second temperature;

[0125] Calculating the relative distance between the first acquisition position and the second acquisition position;

[0126] The temperature confidence level is determined based on the inverse of the relative distance.

[0127] In some embodiments, before collecting the first temperature of the flue gas outlet and the second temperature of the secondary air outlet of the air preheater, the collection module 710 is further used to:

[0128] A first thermocouple array is arranged at the flue gas outlet side, and a first temperature set is collected by the first thermocouple array;

[0129] A second thermocouple array is arranged on the secondary air outlet side, and the second temperature set is collected by the second thermocouple array, wherein the first thermocouple array and the second thermocouple array are radially distributed from the rotor center of the air preheater to the grille edge.

[0130] In some embodiments, the protection module 730 is used to:

[0131] Control the air preheater to close the inlet and outlet smoke and wind damper doors and stop the operation of the supply and exhaust fans;

[0132] The display screen that controls the air preheater displays the system fault corresponding to the overheating state and alarms.

[0133] In summary, the air preheater safety monitoring device collects the first temperature of the flue gas outlet and the second temperature of the secondary air outlet of the air preheater; based on the first temperature, the second temperature and the temperature difference between the first temperature and the second temperature, it is determined whether the air preheater is in an overheating state; if the air preheater is in an overheating state, the emergency protection mechanism is triggered. This device solves the problem of low accuracy of air preheater safety monitoring in related technologies, improves the accuracy of air preheater safety monitoring, and provides reliable guarantee for the safe operation of the air preheater.

[0134] In the above embodiments provided by the present disclosure, the methods and devices provided by the embodiments of the present disclosure are introduced. In order to implement the functions in the methods provided by the above embodiments of the present disclosure, the electronic device may include a hardware structure and a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. One of the above functions may be executed in the form of a hardware structure, a software module, or a hardware structure plus a software module.

[0135] Figure 8 It is a block diagram of an electronic device 800 for implementing the above-mentioned air preheater safety monitoring method according to an exemplary embodiment.

[0136] For example, the electronic device 800 may be a mobile phone, a computer, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0137] Reference Figure 8 , the electronic device 800 may include one or more of the following components: a processing component 802 , a memory 804 , a power component 806 , a multimedia component 808 , an audio component 810 , an input / output (I / O) interface 812 , a sensor component 814 , and a communication component 816 .

[0138] The processing component 802 generally controls the overall operation of the electronic device 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.

[0139] The memory 804 is configured to store various types of data to support operations on the electronic device 600. Examples of such data include instructions for any application or method operating on the electronic device 800, contact data, phone book data, messages, pictures, videos, etc. The memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0140] The power supply component 806 provides power to the various components of the electronic device 800. The power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 800.

[0141] The multimedia component 808 includes a screen that provides an output interface between the electronic device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and / or a rear camera. When the electronic device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0142] The audio component 810 is configured to output and / or input audio signals. For example, the audio component 810 includes a microphone (MIC), and when the electronic device 800 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 804 or sent via the communication component 816. In some embodiments, the audio component 810 also includes a speaker for outputting audio signals.

[0143] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0144] The sensor assembly 814 includes one or more sensors for providing various aspects of status assessment for the electronic device 800. For example, the sensor assembly 814 can detect the open / closed state of the electronic device 800, the relative positioning of components, such as the display and keypad of the electronic device 800, and the sensor assembly 814 can also detect the position change of the electronic device 800 or a component of the electronic device 800, the presence or absence of contact between the user and the electronic device 800, the orientation or acceleration / deceleration of the electronic device 800, and the temperature change of the electronic device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 814 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0145] The communication component 816 is configured to facilitate wired or wireless communication between the electronic device 800 and other devices. The electronic device 800 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, 4G LTE, 5G NR (NewRadio) or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0146] In an exemplary embodiment, the electronic device 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above methods.

[0147] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, and the above instructions can be executed by the processor 820 of the electronic device 800 to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0148] An embodiment of the present disclosure further proposes a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable a computer to execute the air preheater safety monitoring method described in the above embodiment of the present disclosure.

[0149] An embodiment of the present disclosure further provides a computer program product, including a computer program, which executes the air preheater safety monitoring method described in the above embodiment of the present disclosure when a processor executes the computer program.

[0150] Fig. 9 It is a schematic structural diagram of a chip 900 for implementing the above-mentioned air preheater safety monitoring method according to an exemplary embodiment.

[0151] Reference Fig. 9 The chip 900 includes at least one communication interface 901 and a processor 902; the communication interface 901 is used to receive a signal input to the chip 900 or a signal output from the chip 900, and the processor 902 communicates with the communication interface 901 and implements the air preheater safety monitoring method described in the above embodiment through a logic circuit or executing code instructions.

[0152] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0153] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0154] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0155] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processing module, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (control method), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or otherwise processing in a suitable manner if necessary, and then stored in a computer memory.

[0156] It should be understood that the various parts of the embodiments of the present disclosure can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0157] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0158] In addition, each functional unit in each embodiment of the present disclosure may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium. The above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0159] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present disclosure. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A method for monitoring air preheater safety, characterized in that: The method comprises: Collect the first temperature of the flue gas outlet and the second temperature of the secondary air outlet of the air preheater; determining whether the air preheater is in an overheating state according to the first temperature, the second temperature, and the temperature difference between the first temperature and the second temperature; If the air preheater is in the overheating state, the emergency protection mechanism is triggered.

2. The method according to claim 1, characterized in that The collecting of the first temperature of the flue gas outlet and the second temperature of the secondary air outlet of the air preheater comprises: At a first moment, collecting a first temperature set of the flue gas outlet, and taking a maximum value of the first temperature set as the first temperature; At the second moment, the second temperature set of the secondary air side outlet is collected, and the maximum value in the second temperature set is taken as the second temperature, wherein the time from the first moment to the second moment is the time for the rotor of the air preheater to rotate from the flue gas side outlet to the secondary air side outlet at a preset speed.

3. The method according to claim 1, characterized in that The determining whether the air preheater is in an overheat state according to the first temperature, the second temperature, and the temperature difference between the second temperature and the second temperature includes: Setting the first temperature greater than or equal to a first threshold as a first condition; Setting the second temperature greater than or equal to a second threshold as a second condition; Setting the temperature difference less than or equal to a third threshold as a third condition; Calculating a temperature confidence level based on a first acquisition position of the first temperature and a second acquisition position of the second temperature; Setting the temperature confidence level being greater than a fourth threshold as a fourth condition; Determine whether the first temperature, the second temperature and the temperature difference simultaneously satisfy the first condition, the second condition, the third condition and the fourth condition; if so, the air preheater is in an overheated state.

4. The method according to claim 3, characterized in that The calculating the temperature confidence based on the first acquisition position of the first temperature and the second acquisition position of the second temperature includes: Acquire a first acquisition position of the first temperature; Acquire a second collection position of the second temperature; Calculating a relative distance between the first acquisition position and the second acquisition position; The temperature confidence is determined according to the inverse of the relative distance.

5. The method according to claim 2, characterized in that: Before collecting the first temperature of the flue gas outlet and the second temperature of the secondary air outlet of the air preheater, the method further comprises: A first thermocouple array is arranged at the flue gas outlet side, and the first temperature set is collected by the first thermocouple array; A second thermocouple array is arranged on the secondary air outlet side, and the second temperature set is collected by the second thermocouple array, wherein the first thermocouple array and the second thermocouple array are both radially distributed from the rotor center of the air preheater to the grille edge.

6. The method according to claim 1, characterized in that If the air preheater is in the overheating state, triggering the emergency protection mechanism includes: Control the air preheater to close the inlet and outlet smoke and wind damper doors and stop the operation of the supply and exhaust fans; The display screen controlling the air preheater displays the system fault corresponding to the overheating state and issues an alarm.

7. An air preheater safety monitoring device, characterized in that: The device comprises: A collection module, used for collecting a first temperature of a flue gas outlet and a second temperature of a secondary air outlet of an air preheater; a judging module, configured to judge whether the air preheater is in an overheating state according to the first temperature, the second temperature and the temperature difference between the first temperature and the second temperature; The protection module is used to trigger an emergency protection mechanism if the air preheater is in the overheating state.

8. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to cause the computer to execute the method according to any one of claims 1-6.

10. A computer program product, characterized in that The invention comprises a computer program which, when executed by a processor, implements the method according to any one of claims 1 to 6.

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