Boiler combustion self-adjusting method and system based on visual monitoring of hearth temperature field and related device

Abstract

The invention provides a boiler combustion self-adjusting method and system based on visual monitoring of a hearth temperature field and a related device. The method comprises the following steps that the position of a flame center in a boiler is obtained according to an obtained temperature distribution diagram in the corner tangential combustion boiler; adjusting the opening degree of secondary air doors at four corners of the tangential combustion boiler according to the position of the center of the flame in the boiler so as to eliminate the thermal deviation of the boiler; according to the method, the boiler thermal deviation can be automatically eliminated through logic iteration under the conditions that coal quality changes, different combinations of coal mills, boiler coking, burner nozzle burning loss, large deviation of primary air speed and the like, meanwhile, operation of operators is reduced, and the safety and economical efficiency of a unit are improved.

Description

Technical Field

[0001] The invention belongs to the field of coal-fired power station boilers, and in particular relates to a boiler combustion self-adjustment method, system, and related devices based on visual monitoring of furnace temperature field. Background Art

[0002] In recent years, with the increase in the capacity of the unit, the size of the boiler and the total heat load are naturally increasing. In addition, the combustion process in the boiler is similar to a "black box". Changes in coal quality, damage to the burner, changes in the grinding combination, and the frequency of soot blowing will cause changes in the boiler combustion, which can easily lead to combustion deviations in the furnace. Uneven combustion may cause large deviations in the steam temperature on the left and right sides of the boiler, resulting in local safety problems such as overheating, coking, pipeline corrosion, and stress concentration. It may also cause economic problems such as incomplete combustion and increased NOx. Traditional furnace temperature measurement mainly relies on infrared thermometers and thermal phase meters, but generally test personnel use instruments to measure through the fire hole outside the furnace. Not only is the measurement angle and range limited, but it is also impossible to form continuous and real-time measurements. In recent years, many newly built power plants have been equipped with furnace temperature field testing systems. This system arranges sound wave transmitting / receiving sensors in the furnace area, measures the time required for the sound wave to travel a known distance in the gas, calculates the average temperature in the sound channel, and then establishes a two-dimensional temperature field through software. However, this temperature field measurement system is currently only used to monitor combustion in the furnace, but has not effectively played a role in guiding operation adjustments, resulting in the inability to promptly resolve problems with furnace combustion. Summary of the invention

[0003] The purpose of the present invention is to provide a boiler combustion self-adjustment method, system, and related devices based on visual monitoring of the furnace temperature field, which solves the defect that the existing furnace combustion can only measure the temperature field but cannot adjust the furnace combustion parameters, resulting in the problem of furnace combustion cannot be solved in time.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a boiler combustion self-adjustment method based on furnace temperature field visual monitoring, comprising the following steps: The position of the flame center in the furnace is obtained according to the obtained temperature distribution diagram in the furnace of the four-corner tangential combustion boiler; Adjust the opening of the secondary air dampers at the four corners of the four-corner tangential combustion boiler according to the position of the flame center in the furnace to eliminate the thermal deviation of the boiler.

[0005] Preferably, the opening of the secondary air dampers at the four corners of the four-corner tangential combustion boiler is adjusted according to the position of the flame center in the furnace, and the specific method is: When the flame center in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, the opening of the four-corner secondary air damper of the four-corner tangential combustion boiler remains unchanged; When the center of the flame in the furnace is close to the left front area of ​​the furnace of the four-corner tangentially fired boiler, the openings of the left front secondary air damper and the right rear secondary air damper of the four-corner tangentially fired boiler are adjusted respectively, and the openings of the left rear secondary air damper and the right front secondary air damper remain unchanged; When the flame center in the furnace is close to the left rear area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the left rear secondary air damper and the right front secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left front secondary air damper and the right rear secondary air damper remain unchanged; When the center of the flame in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the right rear secondary air damper and the left front secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left rear secondary air damper and the right front secondary air damper remain unchanged; When the center of the flame in the furnace is close to the right front area of ​​the furnace of the four-corner tangential circle combustion boiler, the openings of the left rear secondary air damper and the right front secondary air damper of the four-corner tangential circle combustion boiler are adjusted respectively, and the openings of the left front secondary air damper and the right rear secondary air damper remain unchanged.

[0006] Preferably, when the center of the flame in the furnace is close to the left front area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the left front secondary air damper and the right rear secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left rear secondary air damper and the right front secondary air damper remain unchanged. The specific method is: S1, adjust the opening of the left front secondary air damper to +5%, and the opening of the right rear secondary air damper to -5%; S2, after maintaining the adjusted opening of the left front and right rear secondary air dampers for a set time, obtain the position of the flame center in the furnace, and determine the opening of the left front and right rear secondary air dampers according to the position of the flame center in the furnace, wherein: If the center of the flame in the furnace is close to the left front area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the left front secondary air damper is adjusted by +5%, the opening of the right rear secondary air damper is adjusted by -5%, and S3 is entered; If the center of the flame in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the left front secondary air damper is adjusted by -3%, the opening of the right rear secondary air damper is adjusted by +3%, and the process goes to S3; If the center of the flame in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, stop adjusting; S3, repeat S2 until the opening adjustment range of the left front and right rear secondary air dampers exceeds ±20%, then stop adjusting.

[0007] Preferably, when the center of the flame in the furnace is close to the left rear area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the left rear secondary air damper and the right front secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left front secondary air damper and the right rear secondary air damper remain unchanged. The specific method is: S1, adjust the opening of the left rear secondary air damper to +5%, and the opening of the right front secondary air damper to -5%; S2, after maintaining the adjusted opening of the left rear and right front secondary air dampers for a set time, obtain the position of the flame center in the furnace, and determine the opening of the left rear and right front secondary air dampers according to the position of the flame center in the furnace, wherein: If the center of the flame in the furnace is close to the left rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the left rear secondary air damper is adjusted by +5%, the opening of the right front secondary air damper is adjusted by -5%, and the process goes to S3; If the center of the flame in the furnace is close to the right front area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the left rear secondary air damper is adjusted by -3%, the opening of the right front secondary air damper is adjusted by +3%, and the process goes to S3; If the center of the flame in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, stop adjusting; S3, repeat S2 until the opening adjustment range of the left rear and right front secondary air dampers exceeds ±20%, then stop adjusting.

[0008] Preferably, when the center of the flame in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the right rear secondary air damper and the left front secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left rear secondary air damper and the right front secondary air damper remain unchanged. The specific method is: S1, adjust the opening of the right rear secondary air damper to +5%, and the opening of the left front secondary air damper to -5%; S2, after maintaining the adjusted opening of the left front and right rear secondary air dampers for a set time, obtain the position of the flame center in the furnace, and determine the opening of the left front and right rear secondary air dampers according to the position of the flame center in the furnace, wherein: If the center of the flame in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the right rear secondary air damper is adjusted by +5%, the opening of the left front secondary air damper is adjusted by -5%, and the process goes to S3; If the center of the flame in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the right rear secondary air damper is adjusted by -3%, the opening of the left front secondary air damper is adjusted by +3%, and the process goes to S3; If the center of the flame in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, stop adjusting; S3, repeat S2 until the opening adjustment range of the right rear and left front secondary air dampers exceeds ±20%, then stop adjusting.

[0009] Preferably, when the center of the flame in the furnace is close to the right front area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the left rear secondary air damper and the right front secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left front secondary air damper and the right rear secondary air damper remain unchanged. The specific method is: S1, adjust the opening of the right front secondary air damper to +5%, and the opening of the left rear secondary air damper to -5%; S2, after maintaining the adjusted opening of the left rear and right front secondary air dampers for a set time, obtain the position of the flame center in the furnace, and determine the opening of the left rear and right front secondary air dampers according to the position of the flame center in the furnace, wherein: If the center of the flame in the furnace is close to the right front area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the right front secondary air damper is adjusted by +5%, the opening of the left rear secondary air damper is adjusted by -5%, and the process goes to S3; If the center of the flame in the furnace is close to the left rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the right front secondary air damper is adjusted by -3%, the opening of the left rear secondary air damper is adjusted by +3%, and the process goes to S3; If the center of the flame in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, stop adjusting; S3, repeat S2 until the opening adjustment range of the left rear and right front secondary air dampers exceeds ±20%, then stop adjusting.

[0010] A boiler combustion self-adjusting system based on furnace temperature field visual monitoring, comprising: A flame center position acquisition unit, used to acquire the position of the flame center in the furnace according to the acquired temperature distribution diagram in the furnace of the four-corner tangential circle combustion boiler; The secondary air damper opening adjustment unit is used to adjust the opening of the secondary air dampers at the four corners of the four-corner tangential combustion boiler according to the position of the flame center in the furnace to eliminate the thermal deviation of the boiler.

[0011] An electronic device comprises a processor and a memory, wherein the memory stores computer instructions, and when the computer instructions are executed by the processor, the electronic device executes the method described.

[0012] A computer program product comprises computer executable instructions, wherein the computer executable instructions implement the method when executed.

[0013] A computer-readable storage medium stores computer-executable instructions, which can implement the method when executed by a processor.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a boiler combustion self-adjustment method based on visual monitoring of furnace temperature field. The flame center position is calculated in real time through the temperature field image, and the opening of the secondary air dampers at the four corners is dynamically adjusted to form a "monitoring-analysis-adjustment" closed-loop system. Compared with traditional open-loop monitoring, the combustion deviation can be corrected immediately, the flame center is pulled back to the theoretical tangent circle position, and the furnace heat load distribution is uniform. The measured data shows that the thermal deviation coefficient can be reduced by more than 30%; at the same time, the present invention upgrades the combustion diagnosis from "post-analysis" to "real-time treatment", so that the boiler combustion system has the ability of self-correction, and provides an engineering implementation path for intelligent combustion control.

[0015] In summary, the present invention can eliminate boiler thermal deviations through logical iteration when coal quality changes, different combinations of pulverizers, boiler coking, burner nozzle burnout, and large deviations in primary wind speed occur. At the same time, it reduces the operation of operating personnel and improves the safety and economy of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the boiler burner layout; Figure 2 The flame center tends to burn at angle 4 and the self-adjusting logic diagram; Figure 3 The flame center tends to burn at angle 2 and the self-adjusting logic diagram; Figure 4 The flame center tends to burn at corner 3 and the self-adjusting logic diagram is shown; Figure 5 This is the self-adjusting logic diagram for the flame center to burn toward angle 1. DETAILED DESCRIPTION

[0017] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may 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 to prevent unnecessary details from obstructing the description of the present application.

[0018] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0019] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0020] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0021] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0022] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0023] Example 1 This embodiment provides a boiler combustion self-adjustment method based on visual monitoring of the furnace temperature field. For a boiler with four-corner tangential combustion, the burners are arranged in a row at the four corners of the boiler, and the combustion situation in the furnace is monitored in real time according to the furnace temperature field. Under normal circumstances, the temperature in the center of the furnace is the highest, as follows Figure 1 In the central area, when the combustion is deflected, the highest temperature in the furnace will deviate from the central area, causing steam temperature deviation. At this time, the secondary air opening corresponding to the four corners is adjusted to affect the flame center in the furnace. The combustion self-adjustment method specifically includes the following steps: Step 1, obtaining a temperature distribution diagram inside a boiler furnace; Step 2, obtaining the position of the flame center in the furnace according to the temperature distribution diagram; Step 3: adjust the opening of the secondary air dampers at the four corners of the boiler according to the position of the flame center in the furnace, where: When the flame center in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, the opening of the four-corner secondary air damper of the four-corner tangential combustion boiler remains unchanged; When the center of the flame in the furnace is close to the left front area of ​​the furnace of the four-corner tangentially fired boiler, the openings of the left front secondary air damper and the right rear secondary air damper of the four-corner tangentially fired boiler are adjusted respectively, and the openings of the left rear secondary air damper and the right front secondary air damper remain unchanged; When the flame center in the furnace is close to the left rear area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the left rear secondary air damper and the right front secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left front secondary air damper and the right rear secondary air damper remain unchanged; When the center of the flame in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the right rear secondary air damper and the left front secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left rear secondary air damper and the right front secondary air damper remain unchanged; When the center of the flame in the furnace is close to the right front area of ​​the furnace of the four-corner tangential circle combustion boiler, the openings of the left rear secondary air damper and the right front secondary air damper of the four-corner tangential circle combustion boiler are adjusted respectively, and the openings of the left front secondary air damper and the right rear secondary air damper remain unchanged.

[0024] This application can automatically eliminate boiler thermal deviations through logical iteration when coal quality changes, different pulverizer combinations, boiler coking, burner nozzle burnout, and large deviations in primary wind speed occur, thereby improving the safety and economy of the unit and reducing the operations of operating personnel.

[0025] Example 2 like Figures 2 to 5 As shown, based on Example 1, this embodiment provides a boiler combustion self-adjustment method based on visual monitoring of the furnace temperature field. When the center of the flame in the furnace is close to the left front area of ​​the furnace of the four-corner tangential circle combustion boiler (the direction of corner 4), the openings of the left front secondary air damper and the right rear secondary air damper of the four-corner tangential circle combustion boiler are adjusted respectively, and the openings of the left rear secondary air damper and the right front secondary air damper remain unchanged. The specific method is: S1, adjust the opening of the left front secondary air damper to +5%, and the opening of the right rear secondary air damper to -5%; S2, maintaining the adjusted openings of the left front and right rear secondary air dampers for a set time (in this embodiment, the set time is 10 minutes), obtaining the position of the flame center in the furnace, and determining the openings of the left front and right rear secondary air dampers according to the position of the flame center in the furnace, wherein: If the center of the flame in the furnace is close to the left front area of ​​the furnace of the four-corner tangential combustion boiler, adjust the opening of the left front (corner 4) secondary air damper by +5%, and the opening of the right rear (corner 2) secondary air damper by -5%, and enter S3; If the center of the flame in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler (in the direction of corner 2), the opening of the left front secondary air damper is adjusted by -3%, the opening of the right rear secondary air damper is adjusted by +3%, and the process goes to S3; If the center of the flame in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, stop adjusting; S3, repeat S2 until the opening adjustment range of the left front and right rear secondary air dampers exceeds ±20%, then stop adjusting.

[0026] When the flame center in the furnace is close to the left rear area (angle 3 direction) of the furnace of the four-corner tangential combustion boiler, adjust the opening of the left rear (angle 3) and right front (angle 1) secondary air dampers of the four-corner tangential combustion boiler respectively, and the opening of the left front secondary air damper and the right rear secondary air damper remains unchanged. The specific method is: S1, adjust the opening of the left rear secondary air damper to +5%, and the opening of the right front secondary air damper to -5%; S2, after maintaining the adjusted opening of the left rear and right front secondary air dampers for a set time, obtain the position of the flame center in the furnace, and determine the opening of the left rear and right front secondary air dampers according to the position of the flame center in the furnace, wherein: If the center of the flame in the furnace is close to the left rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the left rear secondary air damper is adjusted by +5%, the opening of the right front secondary air damper is adjusted by -5%, and the process goes to S3; If the center of the flame in the furnace is close to the right front area of ​​the furnace of the four-corner tangential combustion boiler (direction of corner 1), the opening of the left rear secondary air damper is adjusted by -3%, the opening of the right front secondary air damper is adjusted by +3%, and the process goes to S3; If the center of the flame in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, stop adjusting; S3, repeat S2 until the opening adjustment range of the left rear and right front secondary air dampers exceeds ±20%, then stop adjusting.

[0027] When the flame center in the furnace is close to the right rear area (angle 2 direction) of the furnace of the four-corner tangential combustion boiler, adjust the opening of the secondary air damper at the right rear (angle 3) and the left front (angle 4) of the four-corner tangential combustion boiler respectively, and the opening of the left rear secondary air damper and the right front secondary air damper remains unchanged. The specific method is: S1, adjust the opening of the right rear secondary air damper to +5%, and the opening of the left front secondary air damper to -5%; S2, after maintaining the adjusted opening of the left front and right rear secondary air dampers for a set time, obtain the position of the flame center in the furnace, and determine the opening of the left front and right rear secondary air dampers according to the position of the flame center in the furnace, wherein: If the center of the flame in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the right rear secondary air damper is adjusted by +5%, the opening of the left front secondary air damper is adjusted by -5%, and the process goes to S3; If the center of the flame in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the right rear secondary air damper is adjusted by -3%, the opening of the left front secondary air damper is adjusted by +3%, and the process goes to S3; If the center of the flame in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, stop adjusting; S3, repeat S2 until the opening adjustment range of the right rear and left front secondary air dampers exceeds ±20%, then stop adjusting.

[0028] When the flame center in the furnace is close to the right front area of ​​the furnace of the four-corner tangential combustion boiler (direction of corner 1), adjust the opening of the left rear secondary air damper and the right front secondary air damper of the four-corner tangential combustion boiler respectively, and the opening of the left front secondary air damper and the right rear secondary air damper remains unchanged. The specific method is: S1, adjust the opening of the right front secondary air damper to +5%, and the opening of the left rear secondary air damper to -5%; S2, after maintaining the adjusted opening of the left rear and right front secondary air dampers for a set time, obtain the position of the flame center in the furnace, and determine the opening of the left rear and right front secondary air dampers according to the position of the flame center in the furnace, wherein: If the center of the flame in the furnace is close to the right front area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the right front secondary air damper is adjusted by +5%, the opening of the left rear secondary air damper is adjusted by -5%, and the process goes to S3; If the center of the flame in the furnace is close to the left rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the right front secondary air damper is adjusted by -3%, the opening of the left rear secondary air damper is adjusted by +3%, and the process goes to S3; If the center of the flame in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, stop adjusting; S3, repeat S2 until the opening adjustment range of the left rear and right front secondary air dampers exceeds ±20%, then stop adjusting.

[0029] Example 3 This embodiment provides a boiler combustion self-adjusting system based on furnace temperature field visual monitoring, including: A flame center position acquisition unit, used to acquire the position of the flame center in the furnace according to the acquired temperature distribution diagram in the furnace of the four-corner tangential circle combustion boiler; The secondary air damper opening adjustment unit is used to adjust the opening of the secondary air dampers at the four corners of the four-corner tangential combustion boiler according to the position of the flame center in the furnace to eliminate the thermal deviation of the boiler.

[0030] Example 4 This embodiment also provides a computing device. The computing device includes: a bus, a processor, a memory, and a communication interface. The processor, the memory, and the communication interface communicate with each other via the bus. The computing device may be a server or a terminal device. It should be understood that this application does not limit the number of processors and memories in the computing device.

[0031] The bus may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, a bus may include a path for transmitting information between various components of a computing device (e.g., a memory, a processor, a communication interface).

[0032] The processor may include any one or more of a central processing unit (CPU), a graphics processing unit (GPU), a tensor processing unit (TPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), a microprocessor (MP) or a digital signal processor (DSP).

[0033] The memory may include volatile memory, such as random access memory (RAM). The processor may also include non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD) or solid state drive (SSD).

[0034] The memory stores executable program codes, and the processor executes the executable program codes to respectively implement the functions of the first generation module, the second generation module, and the adjustment module, thereby implementing, for example, the * method, etc. That is, the memory may store instructions for the methods and functions of the computing device in any of the above embodiments.

[0035] The communication interface uses a transceiver module such as, but not limited to, a network interface card or a transceiver to implement communication between the computing device and other devices or a communication network.

[0036] Example 5 This embodiment also provides a computer-readable storage medium on which computer instructions are stored. When a processor executes the instructions, the processor executes the method and function involving the computing device in any of the above embodiments.

[0037] In general, various embodiments of the present disclosure may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software, which may be performed by a controller, microprocessor, or other computing device. Although various aspects of the embodiments of the present disclosure are shown and described as block diagrams, flow charts, or using some other graphical representation, it should be understood that the blocks, devices, systems, techniques, or methods described herein may be implemented as, by way of non-limiting example, hardware, software, firmware, dedicated circuits or logic, general purpose hardware or controllers or other computing devices, or some combination thereof.

[0038] Example 6 The present embodiment provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product includes computer executable instructions, such as instructions included in a program module, which are executed in a device on a real or virtual processor of the target to perform the process / method as described above with reference to the accompanying drawings. Typically, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform specific tasks or implement specific abstract data types. In various embodiments, the functions of program modules can be combined or divided between program modules as needed. Machine executable instructions for program modules can be executed in local or distributed devices. In distributed devices, program modules can be located in local and remote storage media.

[0039] The computer program code for realizing the method of the present disclosure can be written in one or more programming languages. These computer program codes can be provided to the processor of general-purpose computer, special-purpose computer or other programmable data processing device, so that the program code, when being executed by computer or other programmable data processing device, causes the function / operation specified in flow chart and / or block diagram to be implemented. The program code can be executed completely on computer, partly on computer, as independent software package, partly on computer and partly on remote computer or completely on remote computer or server.

[0040] In the context of the present disclosure, computer program codes or related data may be carried by any appropriate carrier to enable a device, apparatus or processor to perform the various processes and operations described above. Examples of carriers include signals, computer readable media, and the like. Examples of signals may include electrical, optical, radio, acoustic or other forms of propagation signals, such as carrier waves, infrared signals, and the like.

[0041] A computer-readable medium may be any tangible medium containing or storing a program for or related to an instruction execution system, apparatus or device, or a data storage device such as a data center containing one or more available media. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared or semiconductor system, apparatus or device, or any suitable combination thereof. More detailed examples of computer-readable storage media include an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0042] The embodiments described above 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, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A boiler combustion self-adjustment method based on visual monitoring of furnace temperature field, characterized in that: The following steps are involved: The position of the flame center in the furnace is obtained according to the obtained temperature distribution diagram in the furnace of the four-corner tangential combustion boiler; Adjust the opening of the secondary air dampers at the four corners of the four-corner tangential combustion boiler according to the position of the flame center in the furnace to eliminate the thermal deviation of the boiler.

2. A boiler combustion self-adjustment method based on furnace temperature field visual monitoring according to claim 1, characterized in that: Adjust the opening of the secondary air dampers at the four corners of the four-corner tangential combustion boiler according to the position of the flame center in the furnace. The specific method is: When the flame center in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, the opening of the four-corner secondary air damper of the four-corner tangential combustion boiler remains unchanged; When the center of the flame in the furnace is close to the left front area of ​​the furnace of the four-corner tangentially fired boiler, the openings of the left front secondary air damper and the right rear secondary air damper of the four-corner tangentially fired boiler are adjusted respectively, and the openings of the left rear secondary air damper and the right front secondary air damper remain unchanged; When the flame center in the furnace is close to the left rear area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the left rear secondary air damper and the right front secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left front secondary air damper and the right rear secondary air damper remain unchanged; When the center of the flame in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the right rear secondary air damper and the left front secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left rear secondary air damper and the right front secondary air damper remain unchanged; When the center of the flame in the furnace is close to the right front area of ​​the furnace of the four-corner tangential circle combustion boiler, the openings of the left rear secondary air damper and the right front secondary air damper of the four-corner tangential circle combustion boiler are adjusted respectively, and the openings of the left front secondary air damper and the right rear secondary air damper remain unchanged.

3. The method for self-adjusting boiler combustion based on visual monitoring of furnace temperature field according to claim 1 is characterized in that: When the flame center in the furnace is close to the left front area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the left front secondary air damper and the right rear secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left rear secondary air damper and the right front secondary air damper remain unchanged. The specific method is: S1, adjust the opening of the left front secondary air damper to +5%, and the opening of the right rear secondary air damper to -5%; S2, after maintaining the adjusted opening of the left front and right rear secondary air dampers for a set time, obtain the position of the flame center in the furnace, and determine the opening of the left front and right rear secondary air dampers according to the position of the flame center in the furnace, wherein: If the center of the flame in the furnace is close to the left front area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the left front secondary air damper is adjusted by +5%, the opening of the right rear secondary air damper is adjusted by -5%, and S3 is entered; If the center of the flame in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the left front secondary air damper is adjusted by -3%, the opening of the right rear secondary air damper is adjusted by +3%, and the process goes to S3; If the center of the flame in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, stop adjusting; S3, repeat S2 until the opening adjustment range of the left front and right rear secondary air dampers exceeds ±20%, then stop adjusting.

4. The method for self-adjusting boiler combustion based on visual monitoring of furnace temperature field according to claim 1 is characterized in that: When the flame center in the furnace is close to the left rear area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the left rear secondary air damper and the right front secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left front secondary air damper and the right rear secondary air damper remain unchanged. The specific method is: S1, adjust the opening of the left rear secondary air damper to +5%, and the opening of the right front secondary air damper to -5%; S2, after maintaining the adjusted opening of the left rear and right front secondary air dampers for a set time, obtain the position of the flame center in the furnace, and determine the opening of the left rear and right front secondary air dampers according to the position of the flame center in the furnace, wherein: If the center of the flame in the furnace is close to the left rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the left rear secondary air damper is adjusted by +5%, the opening of the right front secondary air damper is adjusted by -5%, and the process goes to S3; If the center of the flame in the furnace is close to the right front area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the left rear secondary air damper is adjusted by -3%, the opening of the right front secondary air damper is adjusted by +3%, and the process goes to S3; If the center of the flame in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, stop adjusting; S3, repeat S2 until the opening adjustment range of the left rear and right front secondary air dampers exceeds ±20%, then stop adjusting.

5. The method for boiler combustion self-adjustment based on furnace temperature field visual monitoring according to claim 1 is characterized in that: When the flame center in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the right rear secondary air damper and the left front secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left rear secondary air damper and the right front secondary air damper remain unchanged. The specific method is: S1, adjust the opening of the right rear secondary air damper to +5%, and the opening of the left front secondary air damper to -5%; S2, after maintaining the adjusted opening of the left front and right rear secondary air dampers for a set time, obtain the position of the flame center in the furnace, and determine the opening of the left front and right rear secondary air dampers according to the position of the flame center in the furnace, wherein: If the center of the flame in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the right rear secondary air damper is adjusted by +5%, the opening of the left front secondary air damper is adjusted by -5%, and the process goes to S3; If the center of the flame in the furnace is close to the right rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the right rear secondary air damper is adjusted by -3%, the opening of the left front secondary air damper is adjusted by +3%, and the process goes to S3; If the center of the flame in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, stop adjusting; S3, repeat S2 until the opening adjustment range of the right rear and left front secondary air dampers exceeds ±20%, then stop adjusting.

6. The method for self-adjusting boiler combustion based on visual monitoring of furnace temperature field according to claim 1, characterized in that: When the flame center in the furnace is close to the right front area of ​​the furnace of the four-corner tangential combustion boiler, the openings of the left rear secondary air damper and the right front secondary air damper of the four-corner tangential combustion boiler are adjusted respectively, and the openings of the left front secondary air damper and the right rear secondary air damper remain unchanged. The specific method is: S1, adjust the opening of the right front secondary air damper to +5%, and the opening of the left rear secondary air damper to -5%; S2, after maintaining the adjusted opening of the left rear and right front secondary air dampers for a set time, obtain the position of the flame center in the furnace, and determine the opening of the left rear and right front secondary air dampers according to the position of the flame center in the furnace, wherein: If the center of the flame in the furnace is close to the right front area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the right front secondary air damper is adjusted by +5%, the opening of the left rear secondary air damper is adjusted by -5%, and the process goes to S3; If the center of the flame in the furnace is close to the left rear area of ​​the furnace of the four-corner tangential combustion boiler, the opening of the right front secondary air damper is adjusted by -3%, the opening of the left rear secondary air damper is adjusted by +3%, and the process goes to S3; If the center of the flame in the furnace is located at the center of the furnace of the four-corner tangential combustion boiler, stop adjusting; S3, repeat S2 until the opening adjustment range of the left rear and right front secondary air dampers exceeds ±20%, then stop adjusting.

7. A boiler combustion self-adjusting system based on visual monitoring of furnace temperature field, characterized in that: include: A flame center position acquisition unit, used to acquire the position of the flame center in the furnace according to the acquired temperature distribution diagram in the furnace of the four-corner tangential combustion boiler; The secondary air damper opening adjustment unit is used to adjust the opening of the secondary air dampers at the four corners of the four-corner tangential combustion boiler according to the position of the flame center in the furnace to eliminate the thermal deviation of the boiler.

8. An electronic device, characterized in that: The electronic device comprises a processor and a memory, wherein the memory stores computer instructions, and when the computer instructions are executed by the processor, the electronic device executes the method according to any one of claims 1 to 6.

9. A computer program product, characterized in that The computer program product contains computer executable instructions, which implement the method according to any one of claims 1 to 6 when executed.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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