Combustion efficiency monitoring method and system

Abstract

The invention provides a combustion efficiency monitoring method and system, and belongs to the technical field of heating furnace monitoring. The method comprises the following steps: calculating an actual flame area according to a combustion area during actual combustion of a target heating furnace; the actual flame area comprises the overall combustion area of the target heating furnace and the single-furnace-nozzle flame area of each furnace nozzle. And calculating the actual red area according to the red area of the target heating furnace during actual combustion. The actual red zone area comprises the overall red zone area of the target heating furnace and the single furnace nozzle red zone area of each furnace nozzle. Flame combustion efficiency is calculated according to the normal combustion area, the actual flame area and the actual red area of the target heating furnace, and the flame combustion efficiency can comprise the overall combustion efficiency, the overall red area combustion efficiency and the single-furnace-nozzle combustion efficiency of the target heating furnace. Therefore, the combustion working condition of the target heating furnace can be comprehensively and accurately reflected through the flame combustion efficiency, and the purposes of comprehensive monitoring and quantitative analysis of the flame combustion efficiency are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of heating furnace monitoring, and in particular to a combustion efficiency monitoring method and system. Background Art

[0002] Heating furnaces are important energy-consuming equipment in industries such as metallurgy, chemical industry, petrochemical industry, and nonferrous metals. They are also one of the main sources of emissions of pollutants such as carbon dioxide and nitrogen oxides. Domestic heating furnaces mostly use over-oxygen combustion control technology, that is, a certain amount of excess air is introduced to ensure sufficient mixing of air and fuel. However, the amount of excess air introduced has always relied on human experience, resulting in large fluctuations in the combustion conditions of the heating furnace. If the heating furnace is in abnormal conditions for a long time, it will lead to problems such as lower and lower combustion efficiency, short service life of the furnace tube, and safety hazards.

[0003] At present, by monitoring the flame combustion efficiency of the heating furnace, it is possible to determine whether the heating furnace is in an abnormal operating condition. The existing technology reflects the overall combustion condition in the heating furnace by detecting the oxygen content in the combustion atmosphere and the residual oxygen content in part of the flue of the heating furnace. However, the heating furnace is usually equipped with multiple burners, and the combustion efficiency of different burners and the overall combustion efficiency of the heating furnace can reflect the flame combustion efficiency of the heating furnace. Therefore, only by detecting the oxygen content in the combustion atmosphere and the residual oxygen content in part of the flue of the heating furnace, it is not possible to fully and accurately reflect the flame combustion efficiency of the heating furnace, which makes it impossible to accurately determine whether the heating furnace is in an abnormal operating condition. Therefore, how to accurately realize the monitoring and quantitative analysis of the flame combustion efficiency is a problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a combustion efficiency monitoring method and system to at least solve the above-mentioned problem that the flame combustion efficiency of the heating furnace cannot be fully and accurately reflected, resulting in the inability to accurately determine whether the heating furnace is in an abnormal operating condition.

[0005] In order to achieve the above object, the first aspect of the present invention provides a combustion efficiency monitoring method, comprising:

[0006] Calculate the actual flame area based on the combustion area of ​​the target heating furnace during actual combustion;

[0007] According to the red zone area when the target heating furnace is actually burning, calculate the actual red zone area;

[0008] The flame combustion efficiency is calculated based on the normal combustion area, actual flame area and actual red zone area of ​​the target heating furnace.

[0009] Optionally, the actual flame area mentioned above includes the overall combustion area;

[0010] According to the combustion area of ​​the target heating furnace during actual combustion, the actual flame area is calculated, including:

[0011] Acquire the combustion image of the target heating furnace when it is actually burning;

[0012] Determine a burning area image according to the burning image;

[0013] The area of ​​the burning area image is measured to obtain the overall burning area.

[0014] Optionally, the flame combustion efficiency mentioned above includes overall combustion efficiency;

[0015] According to the normal combustion area and actual flame area of ​​the target heating furnace, the flame combustion efficiency is calculated, including:

[0016] Based on the overall combustion area and the normal combustion area of ​​the target heating furnace, the overall combustion efficiency is obtained.

[0017] Optionally, the above-mentioned actual red zone area includes the overall red zone area;

[0018] According to the red zone area when the target heating furnace is actually burning, calculate the actual red zone area, including:

[0019] Perform RGB image recognition on the combustion image to obtain the recognition result;

[0020] According to the recognition results, the overall red zone area is determined;

[0021] Measure the area of ​​the overall red zone region to obtain the overall red zone area.

[0022] Optionally, the flame combustion efficiency mentioned above includes the overall red zone combustion efficiency;

[0023] According to the normal combustion area and actual red zone area of ​​the target heating furnace, the flame combustion efficiency is calculated, including:

[0024] Based on the overall red zone area and the normal combustion area of ​​the target heating furnace, the overall red zone combustion efficiency is determined.

[0025] Optionally, the above-mentioned flame combustion efficiency includes a single furnace nozzle combustion efficiency;

[0026] According to the normal combustion area, actual flame area and actual red zone area of ​​the target heating furnace, the flame combustion efficiency is calculated, including:

[0027] For any nozzle of the target heating furnace, the combustion area and the red zone area of ​​the nozzle when it is actually burning are obtained;

[0028] According to the combustion area of ​​the actual combustion of the furnace nozzle, the corresponding single furnace nozzle flame area is calculated;

[0029] According to the red zone area of ​​the actual burning of the furnace nozzle, the corresponding red zone area of ​​the single furnace nozzle is calculated;

[0030] The combustion efficiency of a single burner nozzle is calculated based on the normal combustion area of ​​the burner nozzle, the flame area of ​​a single burner nozzle and the red zone area of ​​a single burner nozzle.

[0031] Optionally, for any nozzle of the target heating furnace, obtaining the combustion area and the red zone area of ​​the nozzle during actual combustion includes:

[0032] After grayscale processing of the combustion image, the grayscale value of each pixel on the combustion image is identified;

[0033] According to the gray value of each pixel, the overlapping part and the non-overlapping part of the adjacent furnace nozzles in the combustion image are determined;

[0034] According to the overlapping part and non-overlapping part of any furnace nozzle, the combustion area of ​​the furnace nozzle during actual combustion is determined;

[0035] The combustion area of ​​the furnace nozzle is subjected to RGB image recognition to identify the red zone when the furnace nozzle is actually burning.

[0036] Optionally, the combustion efficiency monitoring method further includes:

[0037] Obtaining combustion parameters of a target heating furnace;

[0038] According to the combustion parameters, the furnace characteristic parameter π is calculated f and the air characteristic parameter π a ;

[0039] According to the combustion parameters and furnace characteristic parameters π f and the air characteristic parameter π a , calculate the flame combustion area of ​​the target heating furnace when the combustion efficiency is 100%;

[0040] Based on the flame combustion area, the normal combustion area of ​​the target heating furnace is obtained.

[0041] Optionally, the above combustion parameters include burner flow Q, fuel calorific value ΔH, fuel density ρ f , air density ρ a , furnace temperature T a , burner diameter D and hyperparameter C;

[0042] Calculate the furnace characteristic parameter π f The formula is Calculate the air characteristic parameter π a The formula is The formula for calculating the flame combustion area of ​​the target heating furnace when the combustion efficiency is 100% is S = C × D × (Π f ×Πa ) 0.4 .

[0043] Optionally, the combustion efficiency monitoring method further includes:

[0044] According to the flame combustion efficiency, determine whether the target heating furnace is in an abnormal operating condition;

[0045] If the target heating furnace is in an abnormal operating condition, an abnormal alarm signal will be issued.

[0046] Optionally, the flame combustion efficiency includes overall combustion efficiency, overall red zone combustion efficiency and single burner combustion efficiency;

[0047] According to the flame combustion efficiency, determine whether the target heating furnace is in an abnormal condition, including:

[0048] Adopting the 2oo3 method to judge whether the overall combustion efficiency and / or the overall red zone combustion efficiency and / or the single burner nozzle combustion efficiency is abnormal, so as to judge whether the flame combustion efficiency is abnormal;

[0049] If the flame combustion efficiency is abnormal, the target heating furnace is in an abnormal operating condition.

[0050] Optionally, the flame combustion efficiency includes overall combustion efficiency, overall red zone combustion efficiency and single burner combustion efficiency;

[0051] According to the flame combustion efficiency, determine whether the target heating furnace is in an abnormal condition, including:

[0052] If the overall combustion efficiency and / or the overall red zone combustion efficiency and / or the single furnace nozzle combustion efficiency is abnormal combustion efficiency for more than a preset time, the target heating furnace is in an abnormal operating condition.

[0053] A second aspect of the present invention provides a combustion efficiency monitoring system, comprising:

[0054] An actual flame area calculation module is used to calculate the actual flame area according to the combustion area of ​​the target heating furnace during actual combustion;

[0055] An actual red zone area calculation module is used to calculate the actual red zone area according to the red zone area when the target heating furnace is actually burning;

[0056] The flame combustion efficiency calculation module is used to calculate the flame combustion efficiency according to the normal combustion area, the actual flame area and the actual red zone area of ​​the target heating furnace.

[0057] In a third aspect of the present invention, a machine-readable storage medium is provided, on which instructions are stored. When the instructions are executed by a processor, the processor is configured to execute the combustion efficiency monitoring method.

[0058] In a fourth aspect of the present invention, an electronic device is provided. The electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the combustion efficiency monitoring method is implemented.

[0059] Through the above technical scheme, a combustion efficiency monitoring method and system calculates the actual flame area according to the combustion area of ​​the target heating furnace during actual combustion. The actual flame area may include the overall combustion area of ​​the target heating furnace and the flame area of ​​a single furnace nozzle of each furnace nozzle. The actual red zone area is calculated according to the red zone area of ​​the target heating furnace during actual combustion. The actual red zone area may include the overall red zone area of ​​the target heating furnace and the red zone area of ​​a single furnace nozzle of each furnace nozzle. The flame combustion efficiency is calculated based on the normal combustion area, the actual flame area and the actual red zone area of ​​the target heating furnace, and the flame combustion efficiency may include the overall combustion efficiency, the overall red zone combustion efficiency and the single furnace nozzle combustion efficiency of the target heating furnace. Therefore, the flame combustion efficiency can fully and accurately reflect the combustion conditions of the target heating furnace, thereby achieving the purpose of comprehensive monitoring and quantitative analysis of the flame combustion efficiency.

[0060] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0062] Figure 1 is a flow chart of a combustion efficiency monitoring method provided by one embodiment of the present invention;

[0063] Figure 2 is a block diagram of a combustion efficiency monitoring system provided by one embodiment of the present invention;

[0064] Figure 3 It is a schematic diagram of the structure of an electronic device provided by a preferred embodiment of the present invention.

[0065] Description of Reference Numerals

[0066] 10 - electronic device, 100 - processor, 101 - memory, 102 - computer program. DETAILED DESCRIPTION

[0067] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0068] Example 1

[0069] Figure 1 FIG. 1 is a flow chart of a combustion efficiency monitoring method provided by an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a combustion efficiency monitoring method, comprising:

[0070] S110: Calculating the actual flame area according to the combustion area of ​​the target heating furnace during actual combustion;

[0071] The actual flame area includes the overall combustion area. According to the combustion area of ​​the target heating furnace during actual combustion, the actual flame area is calculated, including: obtaining a combustion image of the target heating furnace during actual combustion. According to the combustion image, a combustion area image is determined. The area of ​​the combustion area image is measured to obtain the overall combustion area.

[0072] In some implementations of this embodiment, edge detection may be performed on the combustion image to determine the combustion area image, and the combustion area image in the combustion image may also be identified by using RGB image recognition technology.

[0073] In addition, the actual flame area also includes the flame area of ​​a single nozzle of any nozzle of the target heating furnace. Specifically, for any nozzle of the target heating furnace, the combustion area of ​​the nozzle when it is actually burning is obtained, and the area of ​​the combustion area of ​​the nozzle when it is actually burning is calculated to obtain the corresponding flame area of ​​the single nozzle.

[0074] As an implementation method of this embodiment, the specific steps of calculating the overall combustion area and the flame area of ​​a single furnace nozzle are as follows: the combustion area image / the combustion area of ​​any furnace nozzle during actual combustion is used as the area to be measured, and the area to be measured is divided into multiple sub-areas that are highly approximate to regular figures. The basic data of each sub-area for calculating the area is measured using a virtual ruler. For any sub-area, the area of ​​the sub-area is calculated using the corresponding basic data, and the areas of all sub-areas are summed to obtain the area of ​​the area to be measured, namely the overall combustion area / the flame area of ​​a single furnace nozzle.

[0075] As another implementation method of the present embodiment, the above-mentioned calculation of the overall combustion area and the calculation of the flame area of ​​a single furnace nozzle can also utilize the following steps: taking the combustion area image / the combustion area of ​​any furnace nozzle during actual combustion as the area to be measured, assigning the same default area to each pixel point, and counting the number of pixels contained in the area to be measured. The area of ​​the area to be measured, i.e., the overall combustion area / the flame area of ​​a single furnace nozzle, can be obtained by multiplying the number of pixels by the default area.

[0076] It should be noted that the above two methods of calculating the overall combustion area and the single burner flame area are merely two implementation options of this embodiment, and do not limit the above two methods of calculating the overall combustion area and the single burner flame area.

[0077] S120: Calculate the actual red zone area according to the red zone area when the target heating furnace is actually burning;

[0078] The actual red zone area includes the overall red zone area. According to the red zone area of ​​the target heating furnace during actual combustion, the actual red zone area is calculated, including: performing RGB image recognition on the combustion image to obtain a recognition result. According to the recognition result, the overall red zone area is determined. The area of ​​the overall red zone area is measured to obtain the overall red zone area.

[0079] In addition, the actual red zone area also includes the red zone area of ​​a single nozzle of any nozzle of the target heating furnace. Specifically, for any nozzle of the target heating furnace, the red zone area of ​​the nozzle when it is actually burning is obtained, and the area of ​​the red zone area of ​​the nozzle when it is actually burning is calculated to obtain the corresponding red zone area of ​​the single nozzle.

[0080] In some implementations of this embodiment, the steps of calculating the overall red zone area and the single burner tip red zone area are as follows: RGB image recognition is performed on the combustion area image / the combustion area of ​​any burner tip during actual combustion, and the red zone is determined using the R value, i.e., when the R value of a sub-image block in the image reaches a preset threshold, the sub-image block is determined to belong to the red zone. After the red zone is determined, the red zone area (i.e., the overall red zone area / the single burner tip red zone area) can be calculated using the following two methods:

[0081] The first method is to divide the red area into multiple sub-areas that are highly approximate to regular shapes, and use a virtual ruler to measure the basic data of each sub-area for calculating the area. For any sub-area, the corresponding basic data is used to calculate the area of ​​the sub-area, and the areas of all sub-areas are summed up to obtain the area of ​​the red area.

[0082] The second method is to assign the same default area to each pixel, count the number of pixels contained in the red area, and multiply the number of pixels by the default area to get the area of ​​the red area.

[0083] It should be noted that the above two methods of calculating the area of ​​the red region are merely two implementation options of this embodiment, and do not limit the above methods of calculating the area of ​​the red region.

[0084] S130: Calculate the flame combustion efficiency according to the normal combustion area, the actual flame area and the actual red zone area of ​​the target heating furnace.

[0085] The flame combustion efficiency includes the overall combustion efficiency. The flame combustion efficiency is calculated based on the normal combustion area of ​​the target heating furnace and the actual flame area, including: obtaining the overall combustion efficiency based on the overall combustion area and the normal combustion area of ​​the target heating furnace.

[0086] Specifically, the normal combustion area fluctuation of the target heating furnace is Sn=0.8S~1.2S, where Sn is the normal combustion area and S is the flame combustion area of ​​the target heating furnace when the combustion efficiency is 100%. The overall combustion efficiency R1 is the ratio of the overall combustion area S1 to the normal combustion area Sn, that is,

[0087] In this embodiment, the overall combustion efficiency is graded: when R1∈(0.8,1], it is complete combustion; when R1∈(0.3,0.8], it is incomplete combustion; and when R1∈[0,0.3], it is an abnormal operating condition.

[0088] The flame combustion efficiency also includes the overall red zone combustion efficiency. The flame combustion efficiency is calculated based on the normal combustion area of ​​the target heating furnace and the actual red zone area, including: determining the overall red zone combustion efficiency based on the overall red zone area and the normal combustion area of ​​the target heating furnace.

[0089] Specifically, the overall red zone combustion efficiency R2 is the ratio of the overall red zone area A1 to the normal combustion area Sn, that is, The overall red zone combustion efficiency is classified into grades: when R2∈[0,0.05), it is complete combustion; when R2∈[0.05,0.1), it is incomplete combustion; and when R2∈[0.1,1], it is an abnormal operating condition.

[0090] In addition, the above flame combustion efficiency also includes the single burner combustion efficiency. According to the normal combustion area, actual flame area and actual red zone area of ​​the target heating furnace, the flame combustion efficiency is calculated, including:

[0091] For any nozzle of the target heating furnace, the combustion area and the red zone area of ​​the nozzle when it is actually burning are obtained;

[0092] In some implementations of this embodiment, for any nozzle of the target heating furnace, obtaining the combustion area and red zone area of ​​the nozzle when the nozzle is actually burning includes: after grayscale processing the combustion image, identifying the grayscale value of each pixel on the combustion image. According to the grayscale value of each pixel, determine the overlapping part and non-overlapping part of adjacent nozzles in the combustion image. According to the overlapping part and non-overlapping part of any nozzle, determine the combustion area of ​​the nozzle when it is actually burning. Perform RGB image recognition on the combustion area of ​​the nozzle to identify the red zone area of ​​the nozzle when it is actually burning. Specifically, firstly, according to the grayscale value of each pixel in the combustion image, distinguish the combustion area of ​​each single nozzle when it is actually burning. For example, if there is no overlapping part between the flames of two single nozzles, there will be a blank gap between the flames of the two single nozzles, and the combustion area of ​​the single nozzle when it is actually burning can be distinguished according to the blank gap. If there is an overlapping part between the flames of the two single nozzles, the grayscale value at the critical point of the overlapping part and the non-overlapping part will change, and the combustion area of ​​the single nozzle when it is actually burning can also be distinguished according to the grayscale value. Then, for the burning area, the red zone area is determined by image recognition of the R value in RGB, that is, when the R value of any sub-area image in the burning area reaches a preset threshold, the sub-area is determined to belong to the red zone area.

[0093] According to the combustion area of ​​the actual combustion of the furnace nozzle, the corresponding single furnace nozzle flame area is calculated;

[0094] Among them, the calculation of the flame area of ​​a single furnace nozzle is consistent with the above-mentioned method of measuring the overall combustion area of ​​the target heating furnace, and there is no need to elaborate here.

[0095] According to the red zone area of ​​the actual burning of the furnace nozzle, the corresponding red zone area of ​​the single furnace nozzle is calculated;

[0096] Among them, the method of calculating the red zone area of ​​a single furnace nozzle is consistent with the above-mentioned method of measuring the overall red zone area, so there is no need to elaborate here.

[0097] The combustion efficiency of a single burner nozzle is calculated based on the normal combustion area of ​​the burner nozzle, the flame area of ​​a single burner nozzle and the red zone area of ​​a single burner nozzle.

[0098] Specifically, the single burner nozzle combustion efficiency includes the single burner nozzle overall combustion efficiency and the single burner nozzle red zone combustion efficiency. The single burner nozzle overall combustion efficiency is the ratio of the single burner nozzle flame area to the normal combustion area of ​​the burner nozzle, and the single burner nozzle red zone combustion efficiency is the ratio of the single burner nozzle red zone area to the normal combustion area of ​​the burner nozzle. Thus, the single burner nozzle combustion efficiency can be obtained by combining the single burner nozzle overall combustion efficiency and the single burner nozzle red zone combustion efficiency.

[0099] Exemplarily, there are two ways to determine whether the combustion efficiency of a single furnace nozzle is abnormal:

[0100] First, when one of the entire combustion efficiency of a single burner nozzle and the combustion efficiency in the red zone of a single burner nozzle is an abnormal combustion efficiency, the combustion efficiency of the single burner nozzle is regarded as an abnormal combustion efficiency.

[0101] Second, when the entire combustion efficiency of a single furnace nozzle and the combustion efficiency of a single furnace nozzle in a red zone are both abnormal combustion efficiencies, the combustion efficiency of the single furnace nozzle is regarded as abnormal combustion efficiency.

[0102] In the above implementation process, the method calculates the actual flame area and the actual red zone area according to the combustion area and the red zone area of ​​the target heating furnace during actual combustion. The actual flame area can include the overall combustion area of ​​the target heating furnace and the flame area of ​​each furnace nozzle, and the actual red zone area can include the overall red zone area of ​​the target heating furnace and the red zone area of ​​each furnace nozzle. Then, based on the normal combustion area, the actual flame area and the actual red zone area of ​​the target heating furnace, the flame combustion efficiency is calculated, and the flame combustion efficiency can include the overall combustion efficiency, the overall red zone combustion efficiency and the single furnace nozzle combustion efficiency of the target heating furnace. Therefore, the flame combustion efficiency can fully and accurately reflect the combustion conditions of the target heating furnace, thereby achieving the purpose of comprehensive monitoring and quantitative analysis of the flame combustion efficiency.

[0103] Example 2

[0104] This embodiment provides a combustion efficiency monitoring method, which is basically the same as the combustion efficiency monitoring method provided in Embodiment 1, and the main difference is that the above combustion efficiency monitoring method further includes:

[0105] Obtaining combustion parameters of a target heating furnace;

[0106] According to the combustion parameters, the furnace characteristic parameter π is calculated f and the air characteristic parameter π a ;

[0107] According to the combustion parameters and furnace characteristic parameters π f and the air characteristic parameter π a , calculate the flame combustion area of ​​the target heating furnace when the combustion efficiency is 100%;

[0108] Based on the flame combustion area, the normal combustion area of ​​the target heating furnace is obtained.

[0109] The normal combustion area fluctuation of the target heating furnace is Sn=0.8S~1.2S, wherein Sn is the normal combustion area, and S is the flame combustion area of ​​the target heating furnace when the combustion efficiency is 100%.

[0110] Example 3

[0111] This embodiment provides a combustion efficiency monitoring method, which is basically the same as the combustion efficiency monitoring method provided in Example 2. The main difference is that the combustion parameters include the burner flow rate Q, the fuel calorific value ΔH, the fuel density ρ f , air density ρ a , furnace temperature T a , burner diameter D and hyperparameter C;

[0112] Calculate the furnace characteristic parameter π f The formula is Calculate the air characteristic parameter π a The formula is The formula for calculating the flame combustion area of ​​the target heating furnace when the combustion efficiency is 100% is S = C × D × (Π f ×Π a ) 0.4 .

[0113] Example 4

[0114] This embodiment provides a combustion efficiency monitoring method, which is basically the same as the combustion efficiency monitoring method provided in Embodiment 1, and the main difference is that the above combustion efficiency monitoring method further includes:

[0115] According to the flame combustion efficiency, determine whether the target heating furnace is in an abnormal operating condition;

[0116] If the target heating furnace is in an abnormal operating condition, an abnormal alarm signal will be issued.

[0117] Specifically, since the flame combustion efficiency can fully and accurately reflect the combustion condition of the target heating furnace, it is possible to accurately determine whether the target heating furnace is in an abnormal condition based on the flame combustion efficiency, and then determine whether to issue an abnormal alarm signal.

[0118] Example 5

[0119] This embodiment provides a combustion efficiency monitoring method, which is basically the same as the combustion efficiency monitoring method provided in Embodiment 4, and the main difference is that: the flame combustion efficiency includes the overall combustion efficiency, the overall red zone combustion efficiency and the single burner combustion efficiency;

[0120] According to the flame combustion efficiency, determine whether the target heating furnace is in an abnormal condition, including:

[0121] Adopting the 2oo3 method to judge whether the overall combustion efficiency and / or the overall red zone combustion efficiency and / or the single burner nozzle combustion efficiency is abnormal, so as to judge whether the flame combustion efficiency is abnormal;

[0122] If the flame combustion efficiency is abnormal, the target heating furnace is in an abnormal operating condition.

[0123] In some implementations of this embodiment, the flame combustion efficiency includes overall combustion efficiency, overall red zone combustion efficiency and single burner combustion efficiency;

[0124] According to the flame combustion efficiency, determine whether the target heating furnace is in an abnormal condition, including:

[0125] If the overall combustion efficiency and / or the overall red zone combustion efficiency and / or the single furnace nozzle combustion efficiency is abnormal combustion efficiency for more than a preset time, the target heating furnace is in an abnormal operating condition.

[0126] The preset time may be 10 seconds.

[0127] Specifically, there are two ways to determine whether the target heating furnace is in an abnormal operating condition:

[0128] First, if two of the overall combustion efficiency, the overall red zone combustion efficiency and the single burner nozzle combustion efficiency are abnormal, the flame combustion efficiency is determined to be abnormal, and thus the target heating furnace is determined to be in an abnormal operating condition.

[0129] The second type is that when any of the overall combustion efficiency, the overall red zone combustion efficiency and the single burner nozzle combustion efficiency is abnormal and the abnormality lasts for 10 seconds, it is determined that the target heating furnace is in an abnormal operating condition.

[0130] Example 6

[0131] Figure 2 FIG. 1 is a block diagram of a combustion efficiency monitoring system provided by an embodiment of the present invention. Figure 2 As shown, an embodiment of the present invention provides a combustion efficiency monitoring system, comprising:

[0132] An actual flame area calculation module is used to calculate the actual flame area according to the combustion area of ​​the target heating furnace during actual combustion;

[0133] An actual red zone area calculation module is used to calculate the actual red zone area according to the red zone area when the target heating furnace is actually burning;

[0134] The flame combustion efficiency calculation module is used to calculate the flame combustion efficiency according to the normal combustion area, the actual flame area and the actual red zone area of ​​the target heating furnace.

[0135] During the above implementation process, the system calculates the actual flame area and the actual red zone area according to the combustion area and the red zone area of ​​the target heating furnace during actual combustion. The actual flame area can include the overall combustion area of ​​the target heating furnace and the flame area of ​​each furnace nozzle, and the actual red zone area can include the overall red zone area of ​​the target heating furnace and the red zone area of ​​each furnace nozzle. Then, based on the normal combustion area, the actual flame area and the actual red zone area of ​​the target heating furnace, the flame combustion efficiency is calculated, and the flame combustion efficiency can include the overall combustion efficiency, the overall red zone combustion efficiency and the single furnace nozzle combustion efficiency of the target heating furnace. Therefore, the flame combustion efficiency can fully and accurately reflect the combustion conditions of the target heating furnace, thereby achieving the purpose of comprehensive monitoring and quantitative analysis of the flame combustion efficiency.

[0136] Example 7

[0137] An embodiment of the present invention provides a machine-readable storage medium, on which instructions are stored. When the instructions are executed by a processor, the processor is configured to execute the above-mentioned combustion efficiency monitoring method.

[0138] Machine-readable storage media include permanent and non-permanent, removable and non-removable media, and can be implemented by any method or technology to store information. Information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include temporary computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0139] An embodiment of the present invention provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned combustion efficiency monitoring method is implemented.

[0140] like Figure 3 FIG. 1 is a schematic diagram of an electronic device provided by an embodiment of the present invention. Figure 3As shown, the electronic device 10 of this embodiment includes: a processor 100, a memory 101, and a computer program 102 stored in the memory 101 and executable on the processor 100. When the processor 100 executes the computer program 102, the steps in the above method embodiment are implemented. Alternatively, when the processor 100 executes the computer program 102, the functions of each module / unit in the above device embodiment are implemented.

[0141] Exemplarily, the computer program 102 may be divided into one or more modules / units, one or more modules / units are stored in the memory 101, and are executed by the processor 100 to complete the present invention. One or more modules / units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program 102 in the terminal device 10. For example, the computer program 102 may be divided into an actual flame area calculation module, an actual red zone area calculation module, and a flame combustion efficiency calculation module.

[0142] The electronic device 10 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The electronic device 10 may include, but is not limited to, a processor 100 and a memory 101. Those skilled in the art will appreciate that Figure 3 It is only an example of the electronic device 10 and does not constitute a limitation of the electronic device 10. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the electronic device may also include input and output devices, network access devices, buses, etc.

[0143] The processor 100 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0144] The memory 101 may be an internal storage unit of the electronic device 10, such as a hard disk or memory of the electronic device 10. The memory 101 may also be an external storage device of the electronic device 10, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the electronic device 10. Further, the memory 101 may also include both an internal storage unit of the electronic device 10 and an external storage device. The memory 101 is used to store computer programs and other programs and data required by the electronic device 10. The memory 101 may also be used to temporarily store data that has been output or is to be output.

[0145] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0146] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0147] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0148] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0149] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0150] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0151] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A combustion efficiency monitoring method, characterized in that: include: Calculate the actual flame area based on the combustion area of ​​the target heating furnace during actual combustion; Calculate the actual red zone area according to the red zone area when the target heating furnace is actually burning; The flame combustion efficiency is calculated based on the normal combustion area of ​​the target heating furnace, the actual flame area and the actual red zone area.

2. The combustion efficiency monitoring method according to claim 1, characterized in that: The actual flame area includes the overall combustion area; The actual flame area is calculated according to the combustion area of ​​the target heating furnace during actual combustion, including: Acquire the combustion image of the target heating furnace when it is actually burning; Determining a combustion area image according to the combustion image; The area of ​​the burning region image is calculated to obtain the overall burning area.

3. The combustion efficiency monitoring method according to claim 2, characterized in that: The flame combustion efficiency includes the overall combustion efficiency; The flame combustion efficiency is calculated based on the normal combustion area of ​​the target heating furnace and the actual flame area, including: Based on the overall combustion area and the normal combustion area of ​​the target heating furnace, the overall combustion efficiency is obtained.

4. The combustion efficiency monitoring method according to claim 2, characterized in that: The actual red zone area includes the overall red zone area; According to the red zone area when the target heating furnace is actually burning, the actual red zone area is calculated, including: Performing RGB image recognition on the combustion image to obtain a recognition result; According to the recognition result, determining the overall red zone area; The area of ​​the overall red zone region is measured to obtain the overall red zone area.

5. The combustion efficiency monitoring method according to claim 4, characterized in that: The flame combustion efficiency includes the overall red zone combustion efficiency; The flame combustion efficiency is calculated based on the normal combustion area of ​​the target heating furnace and the actual red zone area, including: Based on the overall red zone area and the normal combustion area of ​​the target heating furnace, an overall red zone combustion efficiency is determined.

6. The combustion efficiency monitoring method according to claim 2, characterized in that: The flame combustion efficiency includes the single burner combustion efficiency; The flame combustion efficiency is calculated based on the normal combustion area of ​​the target heating furnace, the actual flame area and the actual red zone area, including: For any nozzle of the target heating furnace, the combustion area and the red zone area of ​​the nozzle when it is actually burning are obtained; According to the combustion area of ​​the actual combustion of the furnace nozzle, the corresponding single furnace nozzle flame area is calculated; According to the red zone area of ​​the actual burning of the furnace nozzle, the corresponding red zone area of ​​the single furnace nozzle is calculated; The single burner nozzle combustion efficiency is calculated based on the normal combustion area of ​​the burner nozzle, the flame area of ​​the single burner nozzle and the red zone area of ​​the single burner nozzle.

7. The combustion efficiency monitoring method according to claim 6, characterized in that: For any nozzle of the target heating furnace, obtaining the combustion area and the red zone area of ​​the nozzle when the nozzle is actually burning includes: After grayscale processing is performed on the combustion image, the grayscale value of each pixel on the combustion image is identified; Determine the overlapping parts and non-overlapping parts of adjacent furnace nozzles in the combustion image according to the gray value of each pixel; According to the overlapping part and non-overlapping part of any furnace nozzle, the combustion area of ​​the furnace nozzle during actual combustion is determined; The combustion area of ​​the furnace nozzle is subjected to RGB image recognition to identify the red zone area when the furnace nozzle is actually burning.

8. The combustion efficiency monitoring method according to claim 1, characterized in that: Also includes: Obtaining combustion parameters of a target heating furnace; According to the combustion parameters, the furnace characteristic parameter π is calculated. f and the air characteristic parameter π a ; According to the combustion parameters, the furnace characteristic parameter π f and the air characteristic parameter π a , calculate the flame combustion area of ​​the target heating furnace when the combustion efficiency is 100%; Based on the flame combustion area, a normal combustion area of ​​the target heating furnace is obtained.

9. The combustion efficiency monitoring method according to claim 8, characterized in that: The combustion parameters include burner flow rate Q, fuel calorific value ΔH, fuel density ρ f , air density ρ a , furnace temperature T a , burner diameter D and hyperparameter C; The calculation obtains the furnace characteristic parameter π f The formula is The air characteristic parameter π is obtained by the calculation a The formula is The formula for calculating the flame combustion area of ​​the target heating furnace when the combustion efficiency is 100% is S = C × D × (Π f ×Π a ) 0.4 .

10. The combustion efficiency monitoring method according to claim 1, characterized in that: Also includes: judging whether the target heating furnace is in an abnormal operating condition according to the flame combustion efficiency; If the target heating furnace is in an abnormal operating condition, an abnormal alarm signal is issued.

11. The combustion efficiency monitoring method according to claim 10, characterized in that: The flame combustion efficiency includes overall combustion efficiency, overall red zone combustion efficiency and single burner combustion efficiency; The step of judging whether the target heating furnace is in an abnormal operating condition according to the flame combustion efficiency includes: Adopting a 2oo3 method to judge whether the overall combustion efficiency and / or the overall red zone combustion efficiency and / or the single burner nozzle combustion efficiency is abnormal, so as to judge whether the flame combustion efficiency is abnormal; If the flame combustion efficiency is abnormal, the target heating furnace is in an abnormal operating condition.

12. The combustion efficiency monitoring method according to claim 10, characterized in that: The flame combustion efficiency includes overall combustion efficiency, overall red zone combustion efficiency and single burner combustion efficiency; The step of judging whether the target heating furnace is in an abnormal operating condition according to the flame combustion efficiency includes: If the overall combustion efficiency and / or the overall red zone combustion efficiency and / or the single furnace nozzle combustion efficiency is an abnormal combustion efficiency for more than a preset time, the target heating furnace is in an abnormal operating condition.

13. A combustion efficiency monitoring system, characterized in that: include: An actual flame area calculation module is used to calculate the actual flame area according to the combustion area of ​​the target heating furnace during actual combustion; An actual red zone area calculation module, used to calculate the actual red zone area according to the red zone area of ​​the target heating furnace during actual combustion; The flame combustion efficiency calculation module is used to calculate the flame combustion efficiency according to the normal combustion area of ​​the target heating furnace, the actual flame area and the actual red zone area.

14. An electronic 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 combustion efficiency monitoring method according to any one of claims 1 to 12 is implemented.

15. An electronic 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 combustion efficiency monitoring method according to any one of claims 1 to 12 is implemented.

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