Combustion adjusting method and system for improving steam parameters under low load of once-through boiler and related device

Abstract

The invention provides a combustion adjustment method and system for improving steam parameters under the low load of a once-through boiler and a related device. The combustion adjustment method comprises the following steps that a temperature information set of the boiler under the deep adjustment low load is obtained, the temperature information set comprises a water-cooled wall temperature, a low-temperature superheater wall temperature, a high-temperature superheater wall temperature, a low-temperature reheater wall temperature and a high-temperature reheater wall temperature; calculating a temperature rise value of the water-cooled wall, comparing the temperature rise value of the water-cooled wall with a designed temperature rise value of the water-cooled wall, and adjusting boiler steam parameters under the deep adjustment low load according to a comparison result in combination with the temperature information set; according to the invention, the balance between the safety and economy of the boiler is realized, and a key technical path is provided for the flexible transformation of a coal-fired unit.

Description

Technical Field

[0001] The present invention belongs to the field of direct current boilers, and in particular relates to a combustion adjustment method, system and related devices for improving steam parameters of a direct current boiler under low load. Background Art

[0002] When the unit operates under low parameters (main steam and reheat steam temperature), its boiler efficiency and thermal cycle efficiency will decrease. Low steam parameters will also cause the steam entering the turbine to become wet steam at the last stage blades, which will hit the blades and cause water erosion damage. As the time for thermal power units to participate in deep peak regulation increases, not only the economy of the entire plant decreases, but the erosion of the last stage blades of the turbine is also aggravated. Therefore, it is necessary to increase the boiler parameters under low load. One way is to increase the superheat, that is, to increase the steam temperature by reducing the amount of water entering the water-cooled wall pipe. The other way is to increase the flame center temperature, that is, to increase the temperature of the flue gas to heat the steam and improve the steam parameters. Although these two methods can improve the parameters of steam under low load, there are also constraints, namely the alarm temperature of the boiler water-cooled wall, which leads to unsatisfactory combustion adjustment of steam parameters under low load. Summary of the invention

[0003] The purpose of the present invention is to provide a combustion adjustment method, system and related devices for improving steam parameters of a once-through boiler under low load, which solves the adjustment strategy for improving boiler steam parameters under low load.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a combustion adjustment method for improving steam parameters of a once-through boiler under low load, comprising the following steps: Obtain a temperature information set of the boiler under deep regulation and low load, the temperature information set including water-cooled wall temperature, low-temperature superheater wall temperature, high-temperature superheater wall temperature, low-temperature reheater wall temperature and high-temperature reheater wall temperature; Calculate the water-cooled wall temperature rise, compare it with the designed water-cooled wall temperature rise, and adjust the boiler steam parameters under deep regulation and low load according to the comparison result and the temperature information set.

[0005] Preferably, the water-cooled wall temperature rise is obtained by subtracting the water-cooled wall inlet temperature from the measured water-cooled wall outlet temperature.

[0006] Preferably, according to the comparison result, the boiler steam parameters under deep adjustment and low load are adjusted in combination with the temperature information set, and the specific method is: Subtract the designed water-cooled wall temperature rise from the water-cooled wall temperature rise to get the temperature rise difference; If the temperature rise difference is between the first preset threshold and the third threshold, and the margin between the water wall temperature and the preset alarm value is greater than the second preset threshold, the water wall outlet superheat needs to be increased; If the temperature rise difference is between the first preset threshold and the third threshold, and the margin between the water-cooled wall temperature and the preset alarm value is less than the second preset threshold, and the margins between the low-temperature superheater wall temperature, the high-temperature superheater wall temperature, the low-temperature reheater wall temperature, and the high-temperature reheater wall temperature and the preset alarm value are all greater than the second preset threshold, then the air volume needs to be increased; If the temperature rise difference is less than the first preset threshold, and the margin between the water-cooled wall temperature and the preset alarm value is greater than the second preset threshold, and the margins between the low-temperature superheater wall temperature, the high-temperature superheater wall temperature, the low-temperature reheater wall temperature, and the preset alarm value are all greater than or equal to the second preset threshold, then the water-cooled wall outlet superheat degree needs to be increased until the margin between the water-cooled wall temperature and the preset alarm value is less than the fourth preset threshold, the margin between the superheater wall temperature and the preset alarm value is less than the fourth preset threshold, or the margin between the reheater wall temperature and the preset alarm value is less than the fourth preset threshold, and the adjustment ends; If the temperature rise difference is greater than the third preset threshold, and the margin between the water-cooled wall temperature and the preset alarm value is greater than the fourth preset threshold, the parameters are kept unchanged and the adjustment is completed.

[0007] Preferably, the first preset threshold is -20°C, the second preset threshold is 20°C, the third preset threshold is 0°C, and the fourth preset threshold is 10°C.

[0008] Preferably, the water-cooled wall temperature rise value is obtained by subtracting the water-cooled wall inlet temperature from the measured water-cooled wall outlet temperature; Subtract the designed water-cooled wall temperature rise from the water-cooled wall temperature rise to get the temperature rise difference; If the temperature rise difference is between the first preset threshold and the third threshold, and the margin between the water wall temperature and the preset alarm value is greater than the second preset threshold, the water wall outlet superheat needs to be increased; If the temperature rise difference is between the first preset threshold and the third threshold, and the margin between the water-cooled wall temperature and the preset alarm value is less than the second preset threshold, and the margins between the low-temperature superheater wall temperature, the high-temperature superheater wall temperature, the low-temperature reheater wall temperature, and the high-temperature reheater wall temperature and the preset alarm value are all greater than the second preset threshold, then the air volume needs to be increased; If the temperature rise difference is less than the first preset threshold, and the margin between the water-cooled wall temperature and the preset alarm value is greater than the second preset threshold, and the margins between the low-temperature superheater wall temperature, the high-temperature superheater wall temperature, the low-temperature reheater wall temperature, and the preset alarm value are all greater than or equal to the second preset threshold, then the water-cooled wall outlet superheat degree needs to be increased until the margin between the water-cooled wall temperature and the preset alarm value is less than the fourth preset threshold, the margin between the superheater wall temperature and the preset alarm value is less than the fourth preset threshold, or the margin between the reheater wall temperature and the preset alarm value is less than the fourth preset threshold, and the adjustment ends; If the temperature rise difference is greater than the third preset threshold, and the margin between the water-cooled wall temperature and the preset alarm value is greater than the fourth preset threshold, the parameters are kept unchanged and the adjustment is completed.

[0009] A combustion adjustment system for improving steam parameters of a once-through boiler under low load, comprising: A temperature information acquisition unit is used to acquire a temperature information set of the boiler under deep regulation and low load, the temperature information set including water-cooled wall temperature, low-temperature superheater wall temperature, high-temperature superheater wall temperature, low-temperature reheater wall temperature and high-temperature reheater wall temperature; The parameter adjustment unit is used to calculate the water-cooled wall temperature rise, compare the water-cooled wall temperature rise with the designed water-cooled wall temperature rise, and adjust the boiler steam parameters under deep low load according to the comparison result and in combination with the temperature information set.

[0010] 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.

[0011] A computing device cluster includes at least one computing device, each computing device including a processor and a memory; The processor of the at least one computing device is configured to execute instructions stored in the memory of the at least one computing device, so that the computing device cluster executes the method.

[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 combustion adjustment method for improving steam parameters of a direct current boiler under low load. Through the water-cooled wall temperature rise and the low-temperature superheater wall temperature, the high-temperature superheater wall temperature, the low-temperature reheater wall temperature and the high-temperature reheater wall temperature, it is possible to select whether to increase the superheat degree or the flame center temperature under low load, or both strategies can be carried out simultaneously, or neither strategy can be used to adjust the strategy of deeply adjusting the boiler steam parameters under low load, thereby achieving a balance between boiler safety and economy, and providing a key technical path for the flexibility transformation of coal-fired units. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of adjusting boiler steam parameters under deep regulation and low load in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] Example 1 like Figure 1As shown, this embodiment provides a combustion adjustment method for improving steam parameters of a once-through boiler under low load, comprising the following steps: Step 1, obtaining a temperature information set of the boiler under a deep adjustment (40%) load, the temperature information set including a water-cooled wall temperature, a low-temperature superheater wall temperature, a high-temperature superheater wall temperature, a low-temperature reheater wall temperature, a low-temperature reheater wall temperature, and a high-temperature reheater wall temperature; Step 2, calculating the measured water-cooled wall temperature rise, wherein the measured water-cooled wall temperature rise = water-cooled wall outlet temperature - water-cooled wall inlet temperature; Step 3, calculate the difference between the measured water-cooled wall temperature rise and the boiler design water-cooled wall temperature rise, and adjust the boiler steam parameters under deep low load according to the obtained temperature rise difference and the temperature information set obtained in step 1, where: If the temperature rise difference is between the first preset threshold and the third threshold (in this embodiment, the first preset threshold is -20°C and the third preset threshold is 0°C), and the margin between the water wall temperature and the corresponding preset alarm value is greater than the second preset threshold (in this embodiment, the second preset threshold is 20°C), it is necessary to increase the water wall outlet superheat to increase the boiler superheated steam outlet temperature and the reheated steam outlet temperature; If the temperature rise difference is between the first preset threshold and the third threshold, and the margin between the water-cooled wall temperature and the preset alarm value is less than the second preset threshold (in this embodiment, the second preset threshold is 20°C), and the margins between the low-temperature superheater wall temperature, the high-temperature superheater wall temperature, the low-temperature reheater wall temperature, and the high-temperature reheater wall temperature and their respective corresponding preset alarm values ​​are all greater than the second preset threshold (in this embodiment, the second preset threshold is 20°C), then the superheat and reheater outlet temperatures cannot be increased by increasing the superheat, and the boiler steam parameters need to be increased by increasing the air volume and the flame center height; If the temperature rise difference is less than the first preset threshold (in this embodiment, the first preset threshold is -20°C), and the margin between the water-cooled wall temperature and the preset alarm value is greater than the second preset threshold (in this embodiment, the second preset threshold is 20°C), and the margins between the low-temperature superheater wall temperature, the high-temperature superheater wall temperature, the low-temperature reheater wall temperature, and the high-temperature reheater wall temperature and their respective corresponding preset alarm values ​​are all greater than or equal to the second preset threshold, the water-cooled wall outlet superheat degree can be increased while the flame center height is increased until the margin between the water-cooled wall temperature and the preset alarm value is less than the fourth preset threshold (in this embodiment, the fourth preset threshold is 10°C), the margin between the superheater wall temperature and the preset alarm value is less than the fourth preset threshold, or the margin between the reheater wall temperature and the preset alarm value is less than the fourth preset threshold, the adjustment is completed.

[0023] If the temperature rise difference is greater than the third preset threshold value (in this embodiment, the third preset threshold value is 0°C), and the margin between the water-cooled wall temperature and the preset alarm value is greater than the fourth preset threshold value (in this embodiment, the fourth preset threshold value is 10°C), the main steam parameters under low load can only be improved by equipment modification, that is, keeping all parameters unchanged, and the adjustment is completed.

[0024] The basic principle of this application is that water flows through the water-cooled wall and is heated to superheated steam. The superheat is generally 5~110℃, and then continues to be heated to the target temperature of 540℃, 570℃ or 600℃ through the low-temperature superheater, high-temperature superheater, low-temperature reheater, high-temperature reheater, etc. The heating method of the water in the water-cooled wall can be considered to be to increase the temperature by the temperature of the furnace flame or to reduce the amount of water in the water-cooled wall, and the temperature in the superheater can be considered to be heated by the temperature of the flue gas. To increase the temperature of the boiler outlet, one way is to increase the superheat of the water-cooled wall outlet so that the water vapor enters each superheater. The temperature before the heater is relatively high; the other is to increase the flame center to make the flue gas temperature higher. In this way, although the water temperature at the water-cooled wall outlet is relatively low, it is compensated by the high-temperature flue gas heating to increase the outlet steam temperature. Therefore, this application selects the strategy for adjusting the boiler steam parameters under deep low load according to the margin between the water-cooled wall temperature rise difference, the low-temperature superheater wall temperature, the high-temperature superheater wall temperature, the low-temperature reheater wall temperature and the high-temperature reheater wall temperature and the preset alarm value, thereby achieving a balance between boiler safety and economy, and providing a key technical path for the flexibility transformation of coal-fired units.

[0025] Example 2 This embodiment provides a combustion adjustment system for improving steam parameters of a once-through boiler under low load, comprising: A temperature information acquisition unit is used to acquire a temperature information set of the boiler under deep regulation and low load, the temperature information set including water-cooled wall temperature, low-temperature superheater wall temperature, high-temperature superheater wall temperature, low-temperature reheater wall temperature and high-temperature reheater wall temperature; The parameter adjustment unit is used to calculate the water-cooled wall temperature rise, compare the water-cooled wall temperature rise with the designed water-cooled wall temperature rise, and adjust the boiler steam parameters under deep low load according to the comparison result and in combination with the temperature information set.

[0026] Example 3 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.

[0027] 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).

[0028] 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).

[0029] 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).

[0030] 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.

[0031] 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.

[0032] Example 4 This embodiment also provides a computing device cluster. The computing device cluster includes at least one computing device. The computing device can be a server, such as a central server, an edge server, or a local server in a local data center. In some embodiments, the computing device can also be a terminal device such as a desktop computer, a laptop computer, or a smart phone.

[0033] The computing device cluster includes at least one computing device. The memory of one or more computing devices in the computing device cluster may store the same instructions for executing the method and function involving the computing device in any of the above embodiments.

[0034] In some possible implementations, the memory of one or more computing devices in the computing device cluster may also store partial instructions for executing the method and function of the computing device in any of the above embodiments. In other words, the combination of one or more computing devices can jointly execute instructions for executing the method and function of the computing device.

[0035] It should be noted that the memories in different computing devices in the computing device cluster may store different instructions, which are respectively used to execute part of the functions of the device.

[0036] In some possible implementations, one or more computing devices in a computing device cluster may be connected via a network. The network may be a wide area network or a local area network, etc. Two computing devices are connected via the network. Specifically, the communication interface in each computing device is used to connect to the network.

[0037] An embodiment of the present disclosure also provides a computer program product including instructions, which, when executed on a computer, enables the computer to execute the method and function involving a computing device in any of the above embodiments.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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 combustion adjustment method for improving steam parameters under low load of a once-through boiler, characterized in that: The following steps are involved: Obtain a temperature information set of the boiler under deep regulation and low load, the temperature information set including water-cooled wall temperature, low-temperature superheater wall temperature, high-temperature superheater wall temperature, low-temperature reheater wall temperature and high-temperature reheater wall temperature; Calculate the water-cooled wall temperature rise, compare it with the designed water-cooled wall temperature rise, and adjust the boiler steam parameters under deep regulation and low load according to the comparison result and the temperature information set.

2. The combustion adjustment method for improving steam parameters of a once-through boiler under low load according to claim 1 is characterized in that: The water-cooled wall temperature rise is obtained by subtracting the water-cooled wall inlet temperature from the measured water-cooled wall outlet temperature.

3. The combustion adjustment method for improving steam parameters of a once-through boiler under low load according to claim 1 is characterized in that: According to the comparison results, the boiler steam parameters under deep regulation and low load are adjusted in combination with the temperature information set. The specific method is: Subtract the designed water-cooled wall temperature rise from the water-cooled wall temperature rise to get the temperature rise difference; If the temperature rise difference is between the first preset threshold and the third threshold, and the margin between the water wall temperature and the preset alarm value is greater than the second preset threshold, the water wall outlet superheat needs to be increased; If the temperature rise difference is between the first preset threshold and the third threshold, and the margin between the water-cooled wall temperature and the preset alarm value is less than the second preset threshold, and the margins between the low-temperature superheater wall temperature, the high-temperature superheater wall temperature, the low-temperature reheater wall temperature, and the high-temperature reheater wall temperature and the preset alarm value are all greater than the second preset threshold, then the air volume needs to be increased; If the temperature rise difference is less than the first preset threshold, and the margin between the water-cooled wall temperature and the preset alarm value is greater than the second preset threshold, and the margins between the low-temperature superheater wall temperature, the high-temperature superheater wall temperature, the low-temperature reheater wall temperature, and the high-temperature reheater wall temperature and the preset alarm value are all greater than or equal to the second preset threshold, it is necessary to increase the water-cooled wall outlet superheat and increase the center height of the flame in the furnace until the margin between the water-cooled wall temperature and the preset alarm value is less than the fourth preset threshold, the margin between the superheater wall temperature and the preset alarm value is less than the fourth preset threshold, or the margin between the reheater wall temperature and the preset alarm value is less than the fourth preset threshold, and the adjustment is completed; If the temperature rise difference is greater than the third preset threshold, and the margin between the water-cooled wall temperature and the preset alarm value is greater than the fourth preset threshold, the parameters are kept unchanged and the adjustment is completed.

4. The combustion adjustment method for improving steam parameters of a once-through boiler under low load according to claim 3 is characterized in that: The first preset threshold is -20°C, the second preset threshold is 20°C, the third preset threshold is 0°C, and the fourth preset threshold is 10°C.

5. The combustion adjustment method for improving steam parameters of a once-through boiler under low load according to claim 1, characterized in that: The water-cooled wall temperature rise is obtained by subtracting the water-cooled wall inlet temperature from the measured water-cooled wall outlet temperature. Subtract the designed water-cooled wall temperature rise from the water-cooled wall temperature rise to get the temperature rise difference; If the temperature rise difference is between the first preset threshold and the third threshold, and the margin between the water wall temperature and the preset alarm value is greater than the second preset threshold, the water wall outlet superheat needs to be increased; If the temperature rise difference is between the first preset threshold and the third threshold, and the margin between the water-cooled wall temperature and the preset alarm value is less than the second preset threshold, and the margins between the low-temperature superheater wall temperature, the high-temperature superheater wall temperature, the low-temperature reheater wall temperature, and the high-temperature reheater wall temperature and the preset alarm value are all greater than the second preset threshold, then the air volume needs to be increased; If the temperature rise difference is less than the first preset threshold, and the margin between the water-cooled wall temperature and the preset alarm value is greater than the second preset threshold, and the margins between the low-temperature superheater wall temperature, the high-temperature superheater wall temperature, the low-temperature reheater wall temperature, and the preset alarm value are all greater than or equal to the second preset threshold, then the water-cooled wall outlet superheat degree needs to be increased until the margin between the water-cooled wall temperature and the preset alarm value is less than the fourth preset threshold, the margin between the superheater wall temperature and the preset alarm value is less than the fourth preset threshold, or the margin between the reheater wall temperature and the preset alarm value is less than the fourth preset threshold, and the adjustment ends; If the temperature rise difference is greater than the third preset threshold, and the margin between the water-cooled wall temperature and the preset alarm value is greater than the fourth preset threshold, the parameters are kept unchanged and the adjustment is completed.

6. A combustion adjustment system for improving steam parameters under low load of a once-through boiler, characterized in that: include: A temperature information acquisition unit is used to acquire a temperature information set of the boiler under deep regulation and low load, the temperature information set including water-cooled wall temperature, low-temperature superheater wall temperature, high-temperature superheater wall temperature, low-temperature reheater wall temperature and high-temperature reheater wall temperature; The parameter adjustment unit is used to calculate the water-cooled wall temperature rise, compare the water-cooled wall temperature rise with the designed water-cooled wall temperature rise, and adjust the boiler steam parameters under deep low load according to the comparison result and in combination with the temperature information set.

7. 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 5.

8. A computing device cluster, characterized in that: comprising at least one computing device, each computing device comprising a processor and a memory; The processor of the at least one computing device is configured to execute instructions stored in the memory of the at least one computing device, so that the computing device cluster executes the method according to any one of claims 1 to 5.

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 5 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 5 is implemented.

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