Coal combustion efficiency monitoring method and equipment

Abstract

The invention is suitable for the technical field of coal combustion, and particularly relates to a coal combustion efficiency monitoring method and equipment, and the method comprises the steps: obtaining the first combustion efficiency of each combustion region in coal combustion equipment according to historical combustion data; obtaining the efficiency monitoring level of each combustion area according to each first combustion efficiency; and under the condition that the triggering condition of fire coal efficiency monitoring is met, based on the priority and the efficiency monitoring level of each combustion area, determining a target combustion area which needs to be monitored emphatically, and monitoring the target combustion area in real time to obtain target monitoring efficiency. Therefore, the coal combustion efficiency monitoring method provided by the invention can solve the problem that the monitoring of the coal combustion efficiency is lack of pertinence.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal combustion, and particularly relates to a coal combustion efficiency monitoring method and device. BACKGROUND

[0002] Coal combustion is a complete oxidation process of combustible matter in coal, which is a vigorous chemical reaction that emits light and heat. Coal is a non-renewable energy source. By monitoring the combustion efficiency, problems existing in the combustion process can be found in a timely manner, so as to improve the combustion efficiency of coal and more fully release the chemical energy in coal into useful heat energy or electric energy.

[0003] In the prior art, a uniform monitoring frequency and mode are often used to monitor the combustion efficiency of all combustion areas in a coal-fired equipment. This can lead to unreasonable allocation of monitoring resources and cannot accurately focus on key areas. In the traditional monitoring mode, when the combustion efficiency is problematic, it can not be found in a timely manner due to the large monitoring range or low monitoring frequency, so that the problem cannot be fed back to the operator in a timely manner and measures are taken to adjust, thereby affecting the operation efficiency and safety of the boiler. Therefore, there is currently a lack of targeted monitoring of coal combustion efficiency. SUMMARY

[0004] The embodiments of the present application provide a coal combustion efficiency monitoring method and device, which can solve the problem of lack of targeted monitoring of coal combustion efficiency.

[0005] In a first aspect, the embodiments of the present application provide a coal combustion efficiency monitoring method, comprising: obtaining first combustion efficiencies of each combustion area in the coal-fired equipment according to historical combustion data; obtaining efficiency monitoring levels of each combustion area according to the first combustion efficiencies; In the case of meeting the triggering condition of coal combustion efficiency monitoring, determining a target combustion area that needs to be monitored in priority based on the priority and the efficiency monitoring levels of each combustion area, and monitoring the target combustion area in real time to obtain a target monitoring efficiency.

[0006] The technical solution described above in the embodiments of the present application has at least the following technical effects: The coal combustion efficiency monitoring method provided in the embodiments of the present application obtains the first combustion efficiency of each combustion region in the coal-fired equipment according to historical combustion data; obtains the efficiency monitoring level of each combustion region according to the first combustion efficiency; in the case that the trigger condition of coal combustion efficiency monitoring is met, determines the target combustion region that needs to be monitored in priority and in real time according to the priority and the efficiency monitoring level of each combustion region, and obtains the target monitoring efficiency by monitoring the target combustion region in real time. Therefore, the coal combustion efficiency monitoring method provided in the embodiments of the present application can accurately evaluate the combustion efficiency of each combustion region, monitor the target combustion region in a targeted manner, and timely discover and handle abnormal conditions in the combustion process through the key monitoring and real-time adjustment of the combustion region, which is beneficial to avoiding equipment failure and safety accidents caused by unstable combustion.

[0007] In a possible implementation manner of the first aspect, the efficiency monitoring level of each combustion region is obtained according to the first combustion efficiency, and the efficiency monitoring level of each combustion region comprises: determining a high-efficiency combustion region according to the first combustion efficiency; obtaining the efficiency monitoring level of each combustion region according to the first combustion efficiency and the high-efficiency combustion region.

[0008] In a possible implementation manner of the first aspect, the high-efficiency combustion region is determined according to the first combustion efficiency, and the high-efficiency combustion region comprises: obtaining a first high-efficiency region according to the first combustion efficiency; identifying a currently high-efficiency combustion region, and determining the currently high-efficiency combustion region as a second high-efficiency region; updating the first high-efficiency region according to the second high-efficiency region to obtain the high-efficiency combustion region.

[0009] In a possible implementation manner of the first aspect, the efficiency monitoring level of each combustion region is obtained according to the first combustion efficiency and the high-efficiency combustion region, and the efficiency monitoring level of each combustion region comprises: determining, for each combustion region, a first efficiency range to which the combustion efficiency of the combustion region belongs; determining a first monitoring level corresponding to the first efficiency range; setting the efficiency monitoring level of the combustion region as the first monitoring level; adjusting the efficiency monitoring level corresponding to each combustion region in the high-efficiency combustion region to a second monitoring level.

[0010] In a possible implementation manner of the first aspect, the first combustion efficiency of each combustion region in the coal-fired equipment is obtained according to historical combustion data, and the first combustion efficiency comprises: For each combustion area, obtain fuel consumption, heat energy output and waste heat recovery of the combustion area in the last combustion; determine a basic combustion efficiency of the combustion area according to a ratio of the heat energy output to the fuel consumption of the combustion area; determine a waste heat recovery efficiency of the combustion area according to a ratio of the waste heat recovery to the fuel consumption of the combustion area; determine a first combustion efficiency of the combustion area according to the basic combustion efficiency and the waste heat recovery efficiency.

[0011] In a possible implementation manner of the first aspect, before the target combustion area needing to be monitored in priority is determined based on the priority and the efficiency monitoring level of each combustion area and the target monitoring efficiency is obtained by monitoring the target combustion area in real time in the case that the trigger condition of the coal-fired efficiency monitoring is met, the method further includes: If the heat energy output of the coal-fired equipment is lower than the heat energy output standard, it is determined that the trigger condition of the coal-fired efficiency monitoring is met.

[0012] In a possible implementation manner of the first aspect, before the target combustion area needing to be monitored in priority is determined based on the priority and the efficiency monitoring level of each combustion area and the target monitoring efficiency is obtained by monitoring the target combustion area in real time in the case that the trigger condition of the coal-fired efficiency monitoring is met, the method further includes: determine a first monitoring level corresponding to an initial priority; determine a first combustion area as a combustion area whose corresponding efficiency monitoring level is equal to or higher than the first monitoring level; determine the first combustion area as the target combustion area and obtain the target monitoring efficiency.

[0013] In a possible implementation manner of the first aspect, before the target combustion area needing to be monitored in priority is determined based on the priority and the efficiency monitoring level of each combustion area and the target monitoring efficiency is obtained by monitoring the target combustion area in real time in the case that the trigger condition of the coal-fired efficiency monitoring is met, the method further includes: determine a first priority according to the initial priority and an adjustment parameter value in the case that the real-time combustion efficiency of the first combustion area is not in a preset efficiency range, wherein the first priority is lower than the initial priority; determine a second monitoring level corresponding to the first priority, wherein the second monitoring level is equal to or lower than the first monitoring level; determine a second combustion area as a combustion area whose corresponding efficiency monitoring level is equal to or higher than the second monitoring level; The second combustion area is determined as the target combustion area, and the target monitoring efficiency is obtained.

[0014] In a possible implementation manner of the first aspect, the target combustion area needing to be monitored in priority is determined based on the priority and the efficiency monitoring level of each combustion area, and the target combustion area is monitored in real time to obtain the target monitoring efficiency, and the method further includes: In a case where the sum of the real-time combustion efficiencies of the first combustion area and the second combustion area is not in the preset efficiency range, a second priority is determined according to the first priority and the adjustment parameter value; the second priority is lower than the first priority. A third monitoring level corresponding to the second priority is determined; the third monitoring level is equal to or lower than the second monitoring level. A third combustion area corresponding to an efficiency monitoring level equal to or higher than the third monitoring level is determined. The third combustion area is determined as the target combustion area, and the target monitoring efficiency is obtained.

[0015] In a possible implementation manner of the first aspect, the method further includes: The adjustment parameter value is obtained according to the real-time combustion efficiency of each combustion area obtained through current monitoring and the preset efficiency range.

[0016] In a second aspect, an embodiment of the present application provides a coal combustion efficiency monitoring device, which includes: A first combustion efficiency module is configured to obtain first combustion efficiencies of each combustion area in the coal-fired equipment according to historical combustion data. An efficiency monitoring level module is configured to obtain efficiency monitoring levels of each combustion area according to the first combustion efficiencies. A target monitoring efficiency module is configured to determine a target combustion area needing to be monitored in priority based on a priority and the efficiency monitoring levels of each combustion area in a case where a triggering condition of coal combustion efficiency monitoring is met, and to monitor the target combustion area in real time to obtain a target monitoring efficiency.

[0017] In a third aspect, an embodiment of the present application provides a monitoring device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the method in any one of the above first aspect when executing the computer program.

[0018] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement the method in any one of the first aspect.

[0019] In a fifth aspect, an embodiment of the present application provides a computer program product, which, when executed on a monitoring device, causes the monitoring device to perform the method in any one of the first aspect.

[0020] It can be understood that the beneficial effects of the second aspect to the fifth aspect can be referred to the related description in the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 is a flowchart of a coal combustion efficiency monitoring method provided by an embodiment of the present application; Figure 2 is an implementation flowchart of steps S200, S210 and S220 in the coal combustion efficiency monitoring method provided by an embodiment of the present application; Figure 3 is an implementation flowchart of step S100 in the coal combustion efficiency monitoring method provided by an embodiment of the present application; Figure 4 is an implementation flowchart of step S300 in the coal combustion efficiency monitoring method provided by an embodiment of the present application; Figure 5 is a structural diagram of a coal combustion efficiency monitoring device provided by an embodiment of the present application; Figure 6 is a structural diagram of a monitoring device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0023] In the following description, specific details are set forth in order to provide a thorough understanding of the embodiments of the present application. However, persons skilled in the art should understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary details.

[0024] It should be understood that the word “comprise” or variations such as “comprises” or “comprising”, when used in this specification and in the accompanying claims, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0025] It should also be understood that the term “and / or” when used in this specification and in the claims which follow, unless otherwise specified, means any one or more of the associated listed items or a combination of any one or more of the associated listed items.

[0026] As used in this specification and in the claims, the term “if’ can be interpreted to mean “when” or “once” or “in response to determining” or “in response to detecting,” depending on the context. Similarly, the phrase “if it is determined” or “if [a described condition or event] is detected” can be interpreted to mean “once it is determined” or “in response to determining” or “once [the described condition or event] is detected” or “in response to detecting [the described condition or event],” depending on the context.

[0027] In addition, the terms “first”, “second”, “third”, etc. as used in the description of the specification and the appended claims are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0028] Reference in the specification to “one embodiment” or “some embodiments” etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrases “in one embodiment”, “in some embodiments”, “in other embodiments”, “in additional embodiments”, etc., in various places in the specification are not necessarily all referring to the same embodiment, unless otherwise specifically stated. The terms “comprise”, “comprises”, “comprising”, “include”, “includes”, “including” and variations thereof are meant to encompass the items listed thereafter, but do not exclude other items from being present or added.

[0029] In the related art, a uniform monitoring frequency and mode are often used to monitor the combustion efficiency of all combustion areas in a coal-fired equipment. This can cause unreasonable allocation of monitoring resources and cannot accurately focus on key areas. In the traditional monitoring mode, when the combustion efficiency problem occurs, it may not be found in time due to the large monitoring range or low monitoring frequency, so that the problem cannot be fed back to the operator in time and measures are taken to adjust, thereby affecting the operation efficiency and safety of the boiler. Therefore, there is currently a lack of targeted monitoring of coal combustion efficiency.

[0030] To solve the above problems, the embodiment of the present application provides a coal combustion efficiency monitoring method and device. In the method, the first combustion efficiency of each combustion area in the coal-fired equipment is obtained according to historical combustion data; the efficiency monitoring level of each combustion area is obtained according to the first combustion efficiency; in the case of meeting the triggering condition of coal combustion efficiency monitoring, the target combustion area needing to be monitored is determined based on the priority and the efficiency monitoring level of each combustion area, and the target combustion area is monitored in real time to obtain the target monitoring efficiency. Therefore, the coal combustion efficiency monitoring method provided by the embodiment of the present application can accurately evaluate the combustion efficiency of each combustion area, monitor the target combustion area in a targeted manner, and timely discover and handle abnormal conditions in the combustion process through the key monitoring and real-time adjustment of the combustion area, which is beneficial to avoid equipment failure and safety accidents caused by unstable combustion.

[0031] The coal combustion efficiency monitoring method provided by the embodiment of the present application can be applied to a monitoring device, and the monitoring device is the execution subject of the coal combustion efficiency monitoring method provided by the embodiment of the present application. The specific type of the monitoring device is not limited in the embodiment of the present application.

[0032] For example, the monitoring device can be a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a desktop computer, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a computer, a laptop computer, a handheld communication device, a handheld computing device, etc., but is not limited thereto.

[0033] In order to better understand the coal combustion efficiency monitoring method provided by the embodiment of the present application, the specific implementation process of the coal combustion efficiency monitoring method provided by the embodiment of the present application is exemplarily introduced as follows.

[0034] Figure 1 A schematic flowchart of the coal combustion efficiency monitoring method provided by the embodiment of the present application is shown, and the coal combustion efficiency monitoring method comprises: S100, obtaining the first combustion efficiency of each combustion area in the coal-fired equipment according to historical combustion data.

[0035] Exemplarily, the coal-fired equipment can be horizontally layered: divided according to the height of the hearth (such as bottom layer, middle layer, upper layer), each layer corresponding to a different combustion stage; or vertically segmented: for large boilers, segmented according to the burner group or the position of the coal powder nozzle (such as A / B / C layer burners) to obtain various combustion areas. Taking a four-corner tangentially fired pulverized coal boiler as an example, each corner is independently controlled in terms of the ratio of air and coal powder, and can be divided into four combustion areas (A / B / C / D corners), each combustion area being independently monitored: a zirconia analyzer (measuring O2concentration) is installed in each combustion area, a heat flow meter or an infrared temperature measuring instrument is installed near each burner nozzle to measure the single-corner flame radiant heat, the O2concentration measured by the zirconia analyzer is combined to estimate the difference in combustion efficiency, and the radiant heat is corrected to the actual heat output; a heat flow meter is installed at the outlet of the hearth (measuring total heat energy output Q), and the total heat energy output Q is distributed according to the proportion of single-corner heat load to obtain the heat energy output of each corner; a temperature sensor and a flow meter (such as a pitot tube) are installed at the outlet of each corner burner or at the outlet of the hearth to measure the single-corner flue gas temperature and flow, and the residual heat recovery of each corner is estimated to obtain the fuel consumption of each corner and record the heat energy output and residual heat recovery of each corner, thereby determining the corresponding first combustion efficiency.

[0036] Exemplarily, historical combustion data can be obtained from the distributed control system (DCS) or sensor network of the coal-fired equipment, including parameters such as the temperature, pressure, oxygen content, fuel flow, and exhaust smoke composition (such as CO, NOx) of each combustion area, and the coal-fired equipment is divided into multiple areas (such as the hearth, the overfire air area, the secondary air area, etc.), and the efficiency of each area is calculated separately according to the historical combustion data. For example, =1- wherein, is the heat loss (including exhaust smoke loss, chemical incomplete combustion loss, mechanical incomplete combustion loss, etc.), is the fuel input heat (calculated based on the low calorific value of the fuel and the flow).

[0037] In one possible implementation, please refer to Figure 3 S100, the first combustion efficiency of each combustion area in the coal-fired equipment is obtained according to the historical combustion data, including: S110, for each combustion area, the fuel consumption, heat energy output, and residual heat recovery of the combustion area in the last combustion are obtained.

[0038] Exemplarily, the fuel consumption, heat energy output, and residual heat recovery of the combustion area in the last combustion can be monitored in real time by sensors or meters.

[0039] S120, the basic combustion efficiency of the combustion area is determined according to the ratio of the heat energy output to the fuel consumption of the combustion area.

[0040] Exemplarily, the basic combustion efficiency can be calculated by the ratio of the heat energy output of the combustion area to the fuel consumption, for example, 1' = Q / F × 100%, wherein Q is the heat energy output, and F is the fuel consumption.

[0041] S130, determining the waste heat recovery efficiency of the combustion area according to the ratio of the waste heat recovery amount of the combustion area to the fuel consumption.

[0042] Exemplarily, the waste heat recovery efficiency can be calculated by the ratio of the waste heat recovery amount of the combustion area to the fuel consumption, for example, 1'' = R / F × 100%, wherein R is the waste heat recovery amount, and F is the fuel consumption.

[0043] S140, determining the first combustion efficiency of the combustion area according to the basic combustion efficiency and the waste heat recovery efficiency.

[0044] Exemplarily, the first combustion efficiency of the combustion area can be obtained by adding the basic combustion efficiency and the waste heat recovery efficiency, for example, 1 = (Q + R) / F × 100%, wherein Q is the heat energy output, R is the waste heat recovery amount, and F is the fuel consumption.

[0045] Through the above steps S110 to S140, the conventional combustion efficiency only considers the conversion of fuel chemical energy, while the first combustion efficiency covers the waste heat utilization link by introducing the waste heat recovery efficiency, and is closer to the actual energy saving effect. The fuel consumption and the waste heat recovery amount can be diagnosed respectively: if the fuel consumption is low but the waste heat recovery amount is high, the combustion process needs to be improved; if the waste heat recovery amount is low but the fuel consumption is high, the waste heat recovery design needs to be strengthened. The contribution rate of waste heat recovery can be determined through the waste heat recovery amount, providing data support for investment decision. Through the double efficiency indexes, the combustion and waste heat recovery processes are separated, solving the problem that the conventional efficiency evaluation ignores waste heat utilization, and providing a precise direction for combustion system optimization.

[0046] S200, obtaining the efficiency monitoring level of each combustion area according to each first combustion efficiency.

[0047] Exemplarily, a grading threshold can be formulated, and the grading threshold can be dynamically adjusted in combination with the equipment operation condition (such as load rate, coal type change). If the first combustion efficiency is close to the boundary of the grading threshold (such as the difference between the first combustion efficiency and the boundary of the grading threshold is less than 1%), auxiliary indexes (such as NOx emission amount, furnace temperature deviation) can be introduced for weighted scoring.

[0048] In one possible implementation, referring to Figure 2 S200, obtaining the efficiency monitoring level of each combustion area according to each first combustion efficiency, comprising:​​​ S210, determining high-efficiency combustion regions according to the first combustion efficiencies.

[0049] Exemplarily, the first combustion efficiency can be compared with an efficiency threshold value, and a combustion region higher than the efficiency threshold value is determined as a high-efficiency combustion region. If the first combustion efficiencies of multiple combustion regions are close to the efficiency threshold value (e.g., the difference between the first combustion efficiency and the efficiency threshold value is less than 1%), an auxiliary index (e.g., NOx emission, furnace temperature deviation) can be introduced for further screening.

[0050] Optionally, referring to Figure 2 , S210, determining high-efficiency combustion regions according to the first combustion efficiencies, comprises: S211, obtaining first high-efficiency regions according to the first combustion efficiencies.

[0051] Exemplarily, an efficiency threshold value (e.g., 85%) can be set, and a region with a first combustion efficiency higher than the efficiency threshold value is defined as a first high-efficiency region. The efficiency threshold value can be dynamically adjusted in combination with the device working condition (e.g., load rate, coal type). For example, when the load is high (> 90% of the rated load), the efficiency threshold value is set to 86%; when the load is low (< 60% of the rated load), the efficiency threshold value is set to 83%. Alternatively, the first combustion efficiencies of all combustion regions can be sorted from high to low, and the top N combustion regions are taken as the first high-efficiency regions (N can be adjusted according to the device scale, e.g., the top 20%). An auxiliary index (e.g., NOx emission, furnace temperature deviation) can be introduced to perform secondary screening on the combustion regions with a first combustion efficiency close to the efficiency threshold value (e.g., the difference between the first combustion efficiency and the efficiency threshold value is less than 1%), for example, the comprehensive score = i × (1-NOx i ) × (1- T i ), wherein, i is the first combustion efficiency of the combustion region, NOx i is the normalized value of NOx emission (e.g., actual value / standard limit), T i is the normalized value of furnace temperature deviation, and the first high-efficiency region is determined by comparing the comprehensive score with a score threshold value.

[0052] S212, identifying a combustion region currently combusting efficiently, and determining the combustion region currently combusting efficiently as a second high-efficiency region.

[0053] Exemplarily, the combustion efficiency of each combustion area can be calculated in real time by a high-frequency sensor (e.g., 1 Hz sampling), and compared with historical data to define the "current high-efficiency combustion" condition: the combustion efficiency is higher than the real-time dynamic threshold (e.g., 95% of the average efficiency of the past 10 minutes), and the fluctuation rate of the combustion efficiency is lower than a preset threshold (e.g., standard deviation < 1%), and the area meeting the "current high-efficiency combustion" condition is marked as a second high-efficiency area.

[0054] S213, updating the first high-efficiency area to obtain a high-efficiency combustion area according to the second high-efficiency area.

[0055] Exemplarily, the first high-efficiency area and the second high-efficiency area can be taken as a union to obtain the high-efficiency combustion area, if a certain combustion area exists in both sets, it is marked as "high-efficiency combustion area"; if it only exists in the second high-efficiency area, it is marked as "temporary high-efficiency area", and S211-S213 are re-executed periodically (e.g., every hour) to update the high-efficiency combustion area list, and the "temporary high-efficiency area" is continuously monitored, if it remains high-efficiency for consecutive N times of updating, it is upgraded to "high-efficiency combustion area".

[0056] Through the above steps S211 to S213, real-time monitoring and dynamic updating can quickly respond to efficiency fluctuations (e.g., area B is automatically removed from the high-efficiency area due to coal quality change). The "high-efficiency combustion area" represents a long-term stable high-efficiency area, and the "temporary high-efficiency area" reflects short-term operating condition optimization (e.g., area C is temporarily high-efficiency due to secondary air adjustment), which guides differentiated operation and maintenance strategies. By filtering the basic high-efficiency area based on historical data and verifying it by real-time data, false judgments caused by sensor noise or short-term fluctuations are reduced. The monitoring frequency of "high-efficiency combustion area" is reduced (e.g., 1 time / minute), and the monitoring frequency of "temporary high-efficiency area" is increased (e.g., 10 times / second), balancing data accuracy and system load.

[0057] S220, obtaining an efficiency monitoring level of each combustion area according to the first combustion efficiency and the high-efficiency combustion area.

[0058] Exemplarily, the combustion area can be divided into the following efficiency monitoring levels according to the first combustion efficiency and the high-efficiency combustion area: first-level monitoring: the area in the high-efficiency combustion area with the first combustion efficiency close to the efficiency threshold (e.g., the first combustion efficiency is within ±1% of the efficiency threshold); second-level monitoring: the area in the high-efficiency combustion area with stable efficiency (e.g., the first combustion efficiency is higher than the efficiency threshold by more than 2%); third-level monitoring: the area not in the high-efficiency combustion area, but the first combustion efficiency is at a medium level (e.g., 75%-85%); fourth-level monitoring: the low-efficiency combustion area (the first combustion efficiency is lower than 75%). For the high-efficiency combustion area, the efficiency standard deviation and the operating condition change sensitivity can be introduced as adjustment factors, and the monitoring level weight is i × (1- ) x (1-S), wherein, i is the area efficiency, is the efficiency standard deviation (e.g. near 1-hour volatility), S is the operating condition change sensitivity (e.g. 2% efficiency drop for 10% load fluctuation), and the efficiency monitoring level of the high-efficiency combustion area is determined according to the monitoring level weight.

[0059] Through the above steps S210 to S220, the high-efficiency combustion area is identified, and excessive monitoring of low-efficiency areas is avoided, thereby saving resources. The grading rule combines efficiency and stability to ensure that areas with large fluctuations in the high-efficiency area (e.g. area B) are preferentially monitored to prevent potential efficiency decline. The dynamic threshold and weighted scoring mechanism enables the system to automatically adjust the monitoring strategy according to the operating conditions such as load and coal type. Through grading, invalid monitoring is reduced, and sensor energy consumption and data transmission pressure are reduced.

[0060] Optionally, refer to Figure 2 S220, determining the efficiency monitoring level of each combustion area according to the first combustion efficiency and the high-efficiency combustion area, including: S221, for each combustion area, determining the first efficiency range to which the combustion efficiency of the combustion area belongs.

[0061] Illustratively, according to the device design parameters and historical operation data, the combustion efficiency can be divided into multiple discrete intervals for each combustion area (the intervals divided for each combustion area can be different according to actual conditions). For example, for combustion area A, interval 1 (low efficiency): efficiency < 80%, interval 2 (medium efficiency): 80% ≤ efficiency < 85%, interval 3 (high efficiency): 85% ≤ efficiency ≤ 90%, interval 4 (super high efficiency): efficiency > 90%. And the interval boundaries can be dynamically adjusted in combination with the current operating conditions of the device (such as load rate, coal calorific value). For example, for combustion area A, the lower limit of the high-efficiency interval is increased to 86% at high load (> 90% rated load); the lower limit of the high-efficiency interval is reduced to 83% at low load (< 60% rated load). For each combustion area, the current combustion efficiency is calculated according to real-time monitoring data (such as temperature, oxygen content, fuel flow), and the calculation result is matched with the preset interval to determine the first efficiency range to which it belongs.

[0062] S222, determining the first monitoring level corresponding to the first efficiency range.

[0063] Illustratively, the efficiency monitoring level can include monitoring level 1 (high-frequency monitoring): suitable for low-efficiency areas, monitoring frequency is 1 time / 10 seconds, data sampling interval is 1 second; monitoring level 2 (medium-frequency monitoring): suitable for medium-efficiency areas, monitoring frequency is 1 time / 30 seconds, data sampling interval is 5 seconds; monitoring level 3 (high-frequency monitoring): suitable for high-efficiency areas, monitoring frequency is 1 time / minute, data sampling interval is 10 seconds.

[0064] Exemplarily, the first efficiency range determined according to S221 can be directly mapped to the corresponding monitoring level to obtain the first monitoring. For example: combustion area A (87.2%) → interval 3 (high efficiency) → monitoring level 3; or combustion area A (82.5%) → interval 2 (medium efficiency) → monitoring level 2; or combustion area A (79.8%) → interval 1 (low efficiency) → monitoring level 1.

[0065] S223, set the efficiency monitoring level of the combustion area to the first monitoring level.

[0066] Exemplarily, the efficiency monitoring level of each combustion area can be written into a configuration file through a DCS (Distributed Control System) or SCADA (Supervisory Control And Data Acquisition), and the sampling frequency and data transmission period of each area are dynamically adjusted according to the configuration file.

[0067] S224, adjust the efficiency monitoring level of each combustion area in the high-efficiency combustion area to the second monitoring level.

[0068] It can be understood that the high-efficiency combustion area refers to a set of areas with combustion efficiency higher than a preset threshold (such as 85%), which can include multiple sub-areas, and the second monitoring level is usually lower than the monitoring frequency corresponding to the first monitoring level. The efficiency monitoring level of all sub-areas in the high-efficiency combustion area is adjusted to the second monitoring level.

[0069] Through the above steps S221 to S224, the high-efficiency combustion area adopts low-frequency monitoring to reduce the data storage and processing burden; the low-efficiency combustion area adopts high-frequency monitoring to ensure data accuracy. After adjusting the monitoring level of the high-efficiency combustion area, the efficiency decline trend of the low-efficiency combustion area can be detected earlier, triggering a warning and adjusting the operating parameters. Through hierarchical monitoring, system overload caused by high-frequency monitoring of all areas is avoided.

[0070] S300, in the case of meeting the trigger condition of coal-fired efficiency monitoring, determining the target combustion area that needs to be monitored based on the priority and the efficiency monitoring level of each combustion area, and monitoring the target combustion area in real time to obtain the target monitoring efficiency.

[0071] Exemplarily, the trigger condition of coal-fired efficiency monitoring can be that the combustion efficiency of a certain combustion area is continuously lower than the threshold (such as lower than 80% for 30 minutes); or the concentration of NOx or CO exceeds the environmental protection limit value; or the unit load change rate exceeds ±5% / min. The comprehensive priority P can be obtained according to the priority and the efficiency monitoring level of each combustion area i = efficiency monitoring level weight × priority weight.

[0072] In one possible implementation, see Figure 4 S300, when the triggering conditions for coal combustion efficiency monitoring are met, determining a target combustion area that needs to be monitored based on the priority and the efficiency monitoring level of each combustion area, and performing real-time monitoring on the target combustion area to obtain the target monitoring efficiency, the method further includes: S3001: If it is monitored that the heat output of the coal-fired equipment is lower than the heat output standard, it is determined that the triggering condition for coal-fired efficiency monitoring is met.

[0073] It can be understood that the heat output standard is that the heat output of the coal-fired equipment does not exceed a preset specified value. The preset specified value can be set by ordinary technicians in this field according to actual needs and is not the only limitation here.

[0074] For example, a fixed heat output standard can be set based on equipment design parameters or historical operating data. For example, at rated load, the heat output standard of a coal-fired boiler is 100 MW; at 70% load, the heat output standard is 70 MW (scaled proportionally). The heat output standard can also be dynamically adjusted in combination with real-time operating conditions (such as fuel calorific value, ambient temperature, and load rate). For example, a linear regression model can be used to calculate the dynamic standard based on the fuel's lower heating value (LHV) and load rate: heat output standard = α × load rate × LHV + β, where α is the load rate coefficient and β is the correction term. The steam flow, temperature, and pressure at the boiler outlet are then collected in real time through sensors (such as thermocouples and flow meters) to calculate the heat output of the coal-fired equipment. For example, heat output = × (h out -h in ), is the steam mass flow rate, h out is the outlet steam enthalpy, h in The feed water enthalpy value is sampled at a frequency of 1 time per second, and the average value is calculated through a sliding window (e.g., 1 minute) to monitor the thermal energy output of the coal-fired equipment. If the thermal energy output of the coal-fired equipment is monitored to be lower than the thermal energy output standard for N consecutive times (e.g., 3 times), it is determined that the trigger condition is met and the coal-fired efficiency monitoring process is started.

[0075] Through step S3001, dynamic standard adjustment is implemented to avoid false triggering due to fluctuations in fuel calorific value or ambient temperature changes. The introduction of a tolerance factor and continuous determination mechanism prevents monitoring triggering due to single-shot data noise or transient fluctuations. High-frequency sampling and sliding window average calculation enable rapid response to efficiency declines. Dynamic standard definition, real-time monitoring, and tolerance determination help improve the accuracy and timeliness of coal efficiency monitoring.

[0076] In one possible implementation, see Figure 4, S300, in the case of meeting the trigger condition of coal combustion efficiency monitoring, determining the target combustion area needing to be monitored in priority and the efficiency monitoring level of each combustion area, and performing real-time monitoring on the target combustion area to obtain a target monitoring efficiency, comprising: S301, determining a first monitoring level corresponding to an initial priority.

[0077] Exemplarily, different combustion areas can be divided into different initial priorities according to the equipment operating state, the importance of different combustion areas or user demand, and a corresponding first monitoring level (the higher the monitoring level, the higher the monitoring frequency and accuracy) is determined for each initial priority. For example, priority 1→monitoring level 1 (ultra-high frequency monitoring, 1 time / 5 seconds); priority 2→monitoring level 2 (high frequency monitoring, 1 time / 10 seconds); priority 3→monitoring level 3 (medium frequency monitoring, 1 time / 30 seconds); priority 4→monitoring level 4 (low frequency monitoring, 1 time / minute).

[0078] S302, determining a first combustion area with an efficiency monitoring level equal to or higher than the first monitoring level.

[0079] Exemplarily, for each combustion area, the current efficiency monitoring level thereof can be compared with the first monitoring level: if the current efficiency monitoring level is greater than or equal to the first monitoring level, the combustion area is the first combustion area; otherwise, the combustion area is excluded, and the first combustion area is updated in real time when the efficiency monitoring level is adjusted due to working condition changes.

[0080] S303, determining the first combustion area as a target combustion area and obtaining a target monitoring efficiency.

[0081] Exemplarily, the screened first combustion area can be directly used as the target combustion area, and the target detection efficiency of each target combustion area is calculated. For example, the target detection efficiency is × (1 + waste heat recovery efficiency correction term). An efficiency threshold (such as ≥80%) is set for the target combustion area, and if the target monitoring efficiency is lower than the efficiency threshold, a warning is triggered and an optimization process is started.

[0082] Through the above steps S301 to S303, through the linkage of priority and monitoring level, only the key area is implemented with high frequency monitoring, and the resource waste of non-key areas is reduced. Dynamically adjusting the monitoring level and the target combustion area can still accurately monitor the key area when the load fluctuates or the fuel quality changes. By comparing the target monitoring efficiency with the threshold, the optimization process (such as adjusting the air-coal ratio and optimizing the combustion parameters) is automatically triggered to continuously improve the energy efficiency. The efficiency of the target combustion area is monitored in real time, potential faults (such as ash accumulation and coking) are found in advance, and the unplanned downtime is reduced.

[0083] In a possible implementation, refer to Figure 4 S300, in the case that the trigger condition of the coal-fired efficiency monitoring is met, determining a target combustion area that needs to be monitored in priority based on the priority and the efficiency monitoring level of each combustion area, and performing real-time monitoring on the target combustion area to obtain a target monitoring efficiency, and the method further comprises: S304, in the case that the real-time combustion efficiency of the first combustion area is not within the preset efficiency range, determining the first priority according to the initial priority and the adjustment parameter value. The first priority is lower than the initial priority.

[0084] It can be understood that the preset efficiency range is that the size of the real-time combustion efficiency is not more than a preset specified range, which can be set by a person skilled in the art according to actual needs, and is not uniquely limited here.

[0085] Exemplarily, if the real-time combustion efficiency of the first combustion area (for example, the total real-time combustion efficiency of the first combustion area > 85%) is not within the corresponding preset efficiency range, the initial priority is adjusted according to the adjustment parameter value to obtain the first priority. For example, the preset efficiency range is 80%~85%, the high-efficiency range is 85%~100%, and the low-efficiency range is <80%, if the total real-time combustion efficiency of the first combustion area is within the low-efficiency range (i.e., <80%), a pre-warning is triggered and an optimization process is started.

[0086] S305, determining a second monitoring level corresponding to the first priority. The second monitoring level is equal to or lower than the first monitoring level.

[0087] Exemplarily, a corresponding second monitoring level can be defined for each first priority, and the second monitoring level is ≤ the first monitoring level.

[0088] S306, determining a second combustion area as a combustion area whose efficiency monitoring level is equal to or higher than the second monitoring level.

[0089] Exemplarily, for all combustion areas, the current efficiency monitoring level is compared with the second monitoring level: if the current efficiency monitoring level ≥ the second monitoring level, the combustion area is the second combustion area; otherwise, the combustion area is excluded, and when the efficiency monitoring level is adjusted due to a change in working conditions, the second combustion area is updated in real time.

[0090] S307, determining the second combustion area as a target combustion area and obtaining a target monitoring efficiency.

[0091] Exemplarily, the screened second combustion area can be taken as the target combustion area, and for each target combustion area, a target detection efficiency is calculated. For example, the target detection efficiency is × (1 - efficiency loss correction term). And set the corresponding efficiency threshold (such as <75%) for the target combustion area, if lower than the efficiency threshold, trigger the emergency optimization process.

[0092] Through the above steps S304 to S307, by comparing the real-time efficiency with the preset range, the priority is automatically reduced, avoiding excessive monitoring of low-efficiency areas, and optimizing resource allocation. The second monitoring level is less than or equal to the first monitoring level, so that the low-efficiency area is still moderately monitored, but does not excessively occupy resources. The efficiency of the target combustion area is monitored in real time, and serious low-efficiency problems (such as efficiency <75%) are found in advance, triggering the emergency optimization process and reducing the risk of shutdown. The priority and monitoring level are dynamically adjusted in combination with historical data to adapt to the energy efficiency demand under different working conditions.

[0093] In one possible implementation, please refer to Figure 4 , S300, under the condition that the trigger condition of coal-fired efficiency monitoring is met, the target combustion area that needs to be monitored is determined based on the priority and the efficiency monitoring level of each combustion area, and the target combustion area is monitored in real time to obtain the target monitoring efficiency, and further comprising: S308, in the case that the sum of the real-time combustion efficiencies of the first combustion area and the second combustion area is not in the preset efficiency range, the second priority is determined according to the first priority and the adjustment parameter value. Wherein, the second priority is lower than the first priority.

[0094] It can be understood that the sum of the real-time combustion efficiencies of the first combustion area and the second combustion area refers to the total combustion efficiency obtained by normalizing the union area of the first combustion area and the second combustion area.

[0095] Exemplarily, if the total combustion efficiency (such as >85%) obtained by normalizing the union area of the first combustion area and the second combustion area is not in the corresponding preset efficiency range, the initial priority is adjusted to obtain the first priority according to the adjustment parameter value.

[0096] S309, determine the third monitoring level corresponding to the second priority. Wherein, the third monitoring level is equal to or lower than the second monitoring level.

[0097] Exemplarily, the corresponding third monitoring level can be defined for each second priority, and the third monitoring level is less than or equal to the second monitoring level.

[0098] S310, determine the third combustion area as the combustion area with the corresponding efficiency monitoring level equal to or higher than the third monitoring level.

[0099] Exemplarily, the current efficiency monitoring level of all combustion areas can be compared with the third monitoring level: if the current efficiency monitoring level is greater than or equal to the third monitoring level, the combustion area is the third combustion area; otherwise, the combustion area is excluded, and the third combustion area is updated in real time when the efficiency monitoring level is adjusted due to changes in working conditions.

[0100] S311, determining the third combustion area as a target combustion area, and obtaining a target monitoring efficiency.

[0101] Exemplarily, the screened third combustion area can be taken as a target combustion area, and the target detection efficiency of each target combustion area is calculated. For example, the target detection efficiency = (1-α)×(1-η) + α×η, where η is the current efficiency of the target combustion area, and α is an adjustment parameter value. And an efficiency threshold (such as <70%) is set for the target combustion area, and if the efficiency threshold is lower than the efficiency threshold, an emergency optimization process is triggered.

[0102] Through steps S308 to S311, the sum of efficiencies is determined and the priority is degraded, the multi-area cooperative monitoring is realized, and the overall efficiency is prevented from being reduced due to low efficiency of a single area. The efficiency anomaly of the target combustion area is monitored in real time, the global low efficiency problem is found in advance, the emergency optimization process is triggered, and the system shutdown risk is reduced. The priority and the monitoring level are dynamically adjusted in combination with the historical sum of efficiency data, and the energy efficiency demand under different working conditions is adapted.

[0103] In a possible implementation, please refer to Figure 4 , S300, the method further includes: S3002, obtaining an adjustment parameter value according to the real-time combustion efficiency of each combustion area obtained by current monitoring and the preset efficiency range.

[0104] It can be understood that the adjustment parameter value is a dynamic factor affecting the adjustment range of the priority.

[0105] Exemplarily, the adjustment parameter value α=0 can be if the real-time combustion efficiency is in the preset efficiency range; the adjustment parameter value α=β×η can be if the real-time combustion efficiency is in the high-efficiency range; and the adjustment parameter value α=1+β×η can be if the real-time combustion efficiency is in the low-efficiency range of the preset efficiency range. , where β and are adjustment coefficients.

[0106] ​​Through the above step S3002, by adjusting the parameter value, the deviation degree of real-time efficiency from the preset range is quantified, and an objective basis is provided for subsequent priority or monitoring level adjustment. The historical data is combined to dynamically adjust the parameter, which can quickly respond to the efficiency change trend. The parameter value is aggregated globally (such as taking the maximum value), and the worst area is processed first to realize multi-area collaborative optimization. The calculation of the adjustment parameter value is based on real-time data and preset rules, which reduces human subjective judgment and improves the objectivity and consistency of energy efficiency management. The preset efficiency range and adjustment coefficient can be dynamically adjusted according to the device type, fuel type or operating condition, so that the method is suitable for different scenes.

[0107] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0108] Corresponding to the coal combustion efficiency monitoring method described in the above embodiment, the present embodiment also provides a coal combustion efficiency monitoring device, and each module of the device can realize each step of the coal combustion efficiency monitoring method. Figure 5 The structure block diagram of the coal combustion efficiency monitoring device provided by the present embodiment is shown, and only the parts related to the present embodiment are shown for ease of illustration.

[0109] Referring to Figure 5 The device comprises: A first combustion efficiency module is configured to obtain first combustion efficiencies of each combustion region in the coal-fired equipment according to historical combustion data. An efficiency monitoring level module is configured to obtain efficiency monitoring levels of each combustion region according to the first combustion efficiencies. A target monitoring efficiency module is configured to determine a target combustion region that needs to be monitored in priority in the case that a trigger condition of coal-fired efficiency monitoring is met, based on the priority and the efficiency monitoring levels of each combustion region, and to obtain a target monitoring efficiency by monitoring the target combustion region in real time.

[0110] It should be noted that the information interaction, execution process and the like between the above modules are based on the same concept as the method embodiments of the present application, and the specific functions and the technical effects brought by them can be referred to the method embodiment part. Here, it will not be repeated.

[0111] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be realized in the form of hardware or software functional unit. In addition, the specific name of each functional unit and module is only for the convenience of mutual distinction, and does not limit the protection scope of the present application. The specific working process of the unit and module in the above-mentioned device can refer to the corresponding process in the foregoing method embodiment, which will not be described here.

[0112] The present application also provides a monitoring device, Figure 6 The structural schematic diagram of the monitoring device provided by an embodiment of the present application is shown in the figure. Figure 6 As shown in the figure, the monitoring device 6 of this embodiment comprises at least one processor 60 (only one is shown in the figure), at least one memory 61 (only one is shown in the figure) and a computer program 62 stored in the at least one memory 61 and executable on the at least one processor 60. When the processor 60 executes the computer program 62, the monitoring device 6 realizes the steps in any of the above-mentioned coal combustion efficiency monitoring method embodiments, or the monitoring device 6 realizes the functions of each module / unit in the above-mentioned device embodiments. Figure 6 Figure 6 Exemplarily, the computer program 62 can be divided into one or more modules / units, which are stored in the memory 61 and executed by the processor 60 to complete the present application. The one or more modules / units can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program 62 in the monitoring device 6.

[0113] The monitoring device 6 can be a desktop computer, a notebook computer, a palm computer, a cloud server and other computing devices. The monitoring device can include, but is not limited to, a processor 60, a memory 61. Those skilled in the art can understand that

[0114] The monitoring device 6 is only an example and does not constitute a limitation on the monitoring device 6, and can include more or fewer components than shown, or combine certain components, or different components, for example, it can also include input / output devices, network access devices, buses, etc. Figure 6 ​​

[0115] The processor 60 can be a central processing unit (CPU), and can also be other general-purpose processors, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0116] The memory 61 can be an internal storage unit of the monitoring device 6 in some embodiments, for example, a hard disk or a memory of the monitoring device 6. The memory 61 can also be an external storage device of the monitoring device 6 in other embodiments, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory 61 can include both an internal storage unit and an external storage device of the monitoring device 6. The memory 61 is used to store an operating system, an application program, a boot loader, data and other programs, for example, program codes of the computer program, etc. The memory 61 can also be used to temporarily store data that has been output or will be output.

[0117] The embodiments of the present application further provide a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement the steps in any of the above method embodiments.

[0118] The embodiments of the present application provide a computer program product. When the computer program product is run on a monitoring device, the monitoring device implements the steps in any of the above method embodiments.

[0119] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the present application can implement all or part of the processes in the above-mentioned embodiment methods through a computer program to instruct related hardware to complete, and the computer program can be stored in a computer readable storage medium. When the computer program is executed by a processor, the steps of each method embodiment described above can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable medium at least includes any entity or device capable of carrying the computer program code to the monitoring device, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium. For example, U disk, mobile hard disk, magnetic disk or optical disk, etc.

[0120] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0121] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be realized by electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0122] In the embodiments provided in the present application, it should be understood that the disclosed monitoring device and method can be implemented in other ways. For example, the monitoring device embodiments described above are only schematic, for example, the division of the modules or units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0123] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0124] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A method for monitoring coal combustion efficiency, characterized in that: Applied to a monitoring device, the monitoring device being communicatively connected to a coal-burning device; the method comprises: Obtaining a first combustion efficiency of each combustion zone in the coal-fired equipment according to historical combustion data; obtaining an efficiency monitoring level of each combustion zone according to each of the first combustion efficiencies; When the triggering conditions for coal combustion efficiency monitoring are met, the target combustion area that needs to be monitored is determined based on the priority and the efficiency monitoring level of each combustion area, and the target combustion area is monitored in real time to obtain the target monitoring efficiency.

2. The method for monitoring coal combustion efficiency according to claim 1, wherein: Obtaining the efficiency monitoring level of each combustion zone according to each of the first combustion efficiencies includes: determining a high-efficiency combustion area according to each of the first combustion efficiencies; An efficiency monitoring level of each combustion area is obtained according to each of the first combustion efficiencies and the high-efficiency combustion area.

3. The method for monitoring coal combustion efficiency according to claim 2, wherein: The determining of the high-efficiency combustion area according to each of the first combustion efficiencies includes: obtaining a first high-efficiency region according to each of the first combustion efficiencies; Identifying a combustion region with a current high-efficiency combustion and determining the combustion region with the current high-efficiency combustion as a second high-efficiency region; The first high-efficiency region is updated according to the second high-efficiency region to obtain the high-efficiency combustion region.

4. The method for monitoring coal combustion efficiency according to claim 2, wherein: The obtaining of the efficiency monitoring level of each combustion area according to each of the first combustion efficiencies and the high-efficiency combustion area includes: For each combustion zone, determining a first efficiency range to which the combustion efficiency of the combustion zone belongs; determining a first monitoring level corresponding to the first efficiency range; setting the efficiency monitoring level of the combustion zone to the first monitoring level; The efficiency monitoring level corresponding to each combustion area in the high-efficiency combustion area is adjusted to the second monitoring level.

5. The method for monitoring coal combustion efficiency according to claim 1, wherein: The obtaining of the first combustion efficiency of each combustion zone in the coal-fired equipment according to the historical combustion data includes: For each combustion zone, obtain the fuel consumption, heat output and waste heat recovery of the combustion zone in the last combustion; determining a basic combustion efficiency of the combustion area according to a ratio of heat energy output to fuel consumption of the combustion area; determining the waste heat recovery efficiency of the combustion area according to the ratio of the waste heat recovery amount to the fuel consumption amount of the combustion area; A first combustion efficiency of the combustion zone is determined according to the basic combustion efficiency and the waste heat recovery efficiency.

6. The method for monitoring coal combustion efficiency according to claim 1, wherein: When the triggering conditions for coal combustion efficiency monitoring are met, determining a target combustion area requiring focused monitoring based on the priority and the efficiency monitoring level of each combustion area, and performing real-time monitoring on the target combustion area to obtain a target monitoring efficiency, the method further includes: If it is monitored that the heat energy output of the coal-fired equipment is lower than the heat energy output standard, it is determined that the triggering condition for the coal-fired efficiency monitoring is met.

7. The method for monitoring coal combustion efficiency according to claim 1, wherein: When the triggering conditions for coal combustion efficiency monitoring are met, a target combustion area requiring key monitoring is determined based on the priority and the efficiency monitoring level of each combustion area, and the target combustion area is monitored in real time to obtain a target monitoring efficiency, including: Determine a first monitoring level corresponding to the initial priority; determining a combustion region corresponding to an efficiency monitoring level equal to or higher than the first monitoring level as a first combustion region; The first combustion area is determined as the target combustion area, and the target monitoring efficiency is obtained.

8. The method for monitoring coal combustion efficiency according to claim 7, wherein: When the triggering conditions for coal combustion efficiency monitoring are met, determining a target combustion area that needs to be monitored based on the priority and the efficiency monitoring level of each combustion area, and performing real-time monitoring on the target combustion area to obtain a target monitoring efficiency, further comprising: When the real-time combustion efficiency of the first combustion zone is not within a preset efficiency range, determining a first priority according to the initial priority and the adjustment parameter value; wherein the first priority is lower than the initial priority; Determining a second monitoring level corresponding to the first priority; wherein the second monitoring level is equal to or lower than the first monitoring level; determining a combustion region corresponding to an efficiency monitoring level equal to or higher than the second monitoring level as a second combustion region; The second combustion area is determined as the target combustion area, and the target monitoring efficiency is obtained.

9. The method for monitoring coal combustion efficiency according to claim 8, wherein: When the triggering conditions for coal combustion efficiency monitoring are met, determining a target combustion area that needs to be monitored based on the priority and the efficiency monitoring level of each combustion area, and performing real-time monitoring on the target combustion area to obtain a target monitoring efficiency, further comprising: When the sum of the real-time combustion efficiencies of the first combustion zone and the second combustion zone is not within a preset efficiency range, determining a second priority based on the first priority and the adjustment parameter value; wherein the second priority is lower than the first priority; Determining a third monitoring level corresponding to the second priority; wherein the third monitoring level is equal to or lower than the second monitoring level; determining a combustion region corresponding to an efficiency monitoring level equal to or higher than the third monitoring level as a third combustion region; determining the third combustion area as a target combustion area, and obtaining the target monitoring efficiency; And / or, the method further comprises: The adjustment parameter value is obtained according to the real-time combustion efficiency of each combustion area currently monitored and a preset efficiency range.

10. A monitoring device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method according to any one of claims 1 to 9 is implemented.

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