Micro-oil ignition protection method, device, equipment and medium for boiler equipment

Abstract

This invention relates to the field of boiler equipment technology, and particularly to a method, device, equipment, and medium for micro-oil ignition protection in boiler equipment. The protection method includes: activating the micro-oil ignition mode of the burner when the valve on the supply pipeline is in the open state; acquiring the micro-oil ignition state of the burner and the combustion state of the boiler in real time during the micro-oil ignition mode; and determining that fuel accumulation conditions are met based on the micro-oil ignition state and combustion state, and then controlling the valve on the supply pipeline to be in the closed state. This invention, by monitoring the micro-oil ignition state of the burner and the combustion state of the boiler, forcibly closes the valve on the supply pipeline when both conditions are determined to meet fuel accumulation conditions, thus preventing the accumulation of unburned fuel, such as pulverized coal, in the boiler furnace from the source, thereby avoiding serious safety accidents such as deflagration caused by the accumulation of unburned pulverized coal in the boiler furnace.

Description

Technical Field

[0001] This invention relates to the field of boiler equipment technology, and in particular to a method, device, equipment and medium for micro-oil ignition protection of boiler equipment. Background Technology

[0002] According to the "Twenty-Five Key Requirements for Preventing Power Production Accidents", each coal, oil, and gas burner should be equipped with a separate flame detection device, and the flame detection device should be finely adjusted to ensure that the boiler can correctly detect the flame under full load conditions (including deep peak shaving conditions) and all applicable coal types.

[0003] In the operation of boilers in thermal power plants, the micro-oil ignition system is a core device to ensure stable boiler startup and low-load operation. Current technology has significant design flaws in the micro-oil ignition protection logic used in power plants. When the corresponding angle outlet shut-off valve signal fails to trigger, even if the coal flame detector signal disappears, the outlet shut-off valve will not close to cut off the fuel supply. This can lead to unburned coal dust accumulating in the boiler furnace, potentially causing serious safety accidents such as deflagration. Summary of the Invention

[0004] To solve the above-mentioned technical problems, or at least partially solve them, the present invention provides a micro-oil ignition protection method, device, equipment and medium for boiler equipment, which can prevent unburned fuel such as pulverized coal from accumulating in the boiler furnace from the source, thereby avoiding serious safety accidents such as deflagration caused by the accumulation of unburned pulverized coal in the boiler furnace.

[0005] In a first aspect, the present invention provides a method for protecting a boiler from oil ignition, the boiler comprising a boiler and a burner, the burner being connected to a fuel supply device via a supply pipe to supply fuel to the boiler; the protection method comprising:

[0006] When the valve body on the supply pipeline is in the open position, the burner's micro-oil ignition mode is activated.

[0007] In the micro-oil ignition mode, the micro-oil ignition status of the burner and the combustion status of the boiler are acquired in real time.

[0008] Based on the micro-oil ignition state and the combustion state, it is determined that the fuel accumulation condition is met, and the valve body on the supply pipeline is controlled to be in the closed state.

[0009] In some embodiments, determining that fuel accumulation conditions are met based on the detected micro-oil ignition state and the combustion state, and controlling the valve body on the supply pipeline to be in a closed state, includes:

[0010] If it is determined that the burner is in a state of micro-oil ignition failure and the boiler is in a state of no combustion, the valve body on the supply pipeline is controlled to be in a closed state.

[0011] In some embodiments, determining that the burner is in a micro-oil ignition failure state includes:

[0012] The micro-oil flame at the burner outlet is detected in real time using a micro-oil flame detection device.

[0013] If the micro-oil flame detection device fails to detect a micro-oil flame for a first preset time period, it is determined that the burner is in a micro-oil ignition failure state.

[0014] In some embodiments, determining that the boiler is in a non-combustion state includes:

[0015] The fuel flame inside the boiler is detected in real time using a fuel flame detection device.

[0016] If the fuel flame detection device fails to detect a fuel flame for a second preset period of time, it is determined that the boiler is in a non-combustion state.

[0017] In some embodiments, when it is determined that fuel accumulation conditions are met based on the detected micro-oil ignition state and the combustion state, the micro-oil ignition protection method for boiler equipment further includes:

[0018] Control the alarm device to send an alarm signal.

[0019] In some embodiments, after controlling the valve body on the supply pipeline to be in a closed state, the method for micro-oil ignition protection of boiler equipment further includes:

[0020] The connection between the fuel supply equipment and the supply pipeline is switched from a connected state to an isolated state.

[0021] Secondly, the present invention also provides a micro-oil ignition protection device for a boiler device, the boiler device including a boiler and a burner, the burner being connected to a fuel supply device via a supply pipe to supply fuel to the boiler; the protection device includes:

[0022] The activation module is used to activate the micro-oil ignition mode of the burner when the valve body on the supply pipeline is in the open state.

[0023] The acquisition module is used to acquire the micro-oil ignition state of the burner and the combustion state of the boiler in real time under the micro-oil ignition mode.

[0024] The control module is used to determine whether the fuel accumulation conditions are met based on the micro-oil ignition state and the combustion state, and to control the valve body on the supply pipeline to be in the closed state.

[0025] Thirdly, the present invention also provides an electronic device, including a processor and a memory, wherein the processor executes the steps of the micro-oil ignition protection method for boiler equipment as described in the first aspect by calling a program or instruction stored in the memory.

[0026] Fourthly, the present invention also provides a storage medium storing a program or instructions that cause a computer to perform the steps of the micro-oil ignition protection method for boiler equipment as described in the first aspect.

[0027] The technical solution provided by the embodiments of the present invention has the following advantages compared with the prior art:

[0028] The micro-oil ignition protection method for boiler equipment provided in this embodiment of the invention includes: activating the micro-oil ignition mode of the burner when the valve body on the supply pipeline is in the open state; acquiring the micro-oil ignition state of the burner and the combustion state of the boiler in real time under the micro-oil ignition mode; determining that fuel accumulation conditions are met based on the micro-oil ignition state and the combustion state, and controlling the valve body on the supply pipeline to be in the closed state. Thus, this embodiment of the invention, by monitoring the micro-oil ignition state of the burner and the combustion state of the boiler, forcibly closes the valve body on the supply pipeline when both the micro-oil ignition state and the combustion state of the boiler determine that fuel accumulation conditions are met, thereby preventing the accumulation of unburned fuel, such as pulverized coal, in the boiler furnace from the source, and thus avoiding serious safety accidents such as deflagration caused by the accumulation of unburned pulverized coal in the boiler furnace. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic flowchart of a micro-oil ignition protection method for boiler equipment provided in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of a micro-oil ignition protection device for boiler equipment provided in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0036] This invention monitors the micro-oil ignition status of the burner and the combustion status of the boiler. When both the micro-oil ignition status of the burner and the combustion status of the boiler are determined to meet the fuel accumulation conditions, the valve on the supply pipeline is forcibly closed. This prevents unburned fuel, such as pulverized coal, from accumulating in the boiler furnace, thereby avoiding serious safety accidents such as deflagration caused by the accumulation of unburned pulverized coal in the boiler furnace.

[0037] The following description, in conjunction with the accompanying drawings, provides an exemplary description of the outlet temperature control method, apparatus, equipment, and medium for a heating furnace provided in the embodiments of the present invention.

[0038] Figure 1 This is a schematic flowchart illustrating a method for protecting boiler equipment from micro-oil ignition, provided by an embodiment of the present invention. The boiler equipment includes a boiler and a burner, the burner being connected to a fuel supply device via a supply pipe to supply fuel to the boiler. This method is applicable to application scenarios requiring protection against micro-oil ignition in boiler equipment. This method can be executed by a micro-oil ignition protection device for boiler equipment provided by this embodiment of the invention, which can be implemented using software and / or hardware. Figure 1 As shown, the micro-oil ignition protection method for boiler equipment includes the following steps:

[0039] S101. When the valve body on the supply pipeline is in the open state, the micro-oil ignition mode of the burner is activated.

[0040] Among them, the micro-oil ignition mode is a low-cost ignition technology commonly used in power plant boilers and other equipment. It generates a high-temperature flame by burning a small amount of diesel oil, which ignites fuel such as pulverized coal injected into the boiler, ultimately heating the boiler.

[0041] Specifically, in this step, when the valve body on the supply pipeline is in the open state, the micro-oil ignition mode of the burner is activated, thereby enabling the combustion of the fuel injected into the boiler.

[0042] S102. In the micro-oil ignition mode, obtain the micro-oil ignition state of the burner and the combustion state of the boiler.

[0043] Specifically, in this step, after the burner is turned on in micro-oil ignition mode, the micro-oil ignition state of the burner and the combustion state of the boiler are obtained to prepare for S103.

[0044] S103. Based on the micro-oil ignition state and combustion state, determine that the fuel accumulation conditions are met, and control the valve body on the supply pipeline to be in the closed state.

[0045] The fuel accumulation condition is the condition for determining whether the valve on the supply pipeline needs to be closed. Specifically, in this step, based on the micro-oil ignition state of the burner and the combustion state of the boiler obtained in S102, it is determined whether the fuel accumulation condition is met according to the micro-oil ignition state and the combustion state. If the fuel accumulation condition is met, the valve on the supply pipeline is controlled to be closed.

[0046] Therefore, by monitoring the micro-oil ignition status of the burner and the combustion status of the boiler, when both the micro-oil ignition status of the burner and the combustion status of the boiler are determined to meet the fuel accumulation conditions, the valve on the supply pipeline is forcibly closed, thereby preventing unburned fuel, such as pulverized coal, from accumulating in the boiler furnace from the source, thus avoiding serious safety accidents such as deflagration caused by the accumulation of unburned pulverized coal in the boiler furnace.

[0047] In some embodiments, determining that fuel accumulation conditions are met based on the detected micro-oil ignition state and the combustion state, and controlling the valve body on the supply pipeline to be in a closed state, includes:

[0048] If the burner fails to ignite with micro-oil and the boiler is found to be in a non-combustion state, the valve on the supply pipeline is controlled to be closed.

[0049] Specifically, when the burner is found to have failed to ignite micro-oil and the boiler is found to be in a non-combustion state, it can be determined that the fuel input into the boiler furnace is not burning. Unburned fuel, such as pulverized coal, will accumulate in the boiler furnace, which may lead to serious safety accidents such as deflagration.

[0050] Based on this, in this embodiment, when it is determined that the burner's micro-oil ignition has failed and the boiler is in a non-combustion state, the valve on the supply pipeline is controlled to be closed. That is, when both the burner's micro-oil ignition state and the boiler's combustion state are determined to meet the fuel accumulation conditions, the valve on the supply pipeline is forcibly closed to prevent unburned fuel, such as pulverized coal, from accumulating in the boiler's furnace, thereby avoiding serious safety accidents such as deflagration caused by the accumulation of unburned pulverized coal in the boiler's furnace.

[0051] In some embodiments, determining that the burner is in a micro-oil ignition failure state includes:

[0052] The micro-oil flame at the burner outlet is detected in real time using a micro-oil flame detection device.

[0053] If the micro-oil flame detection device fails to detect a micro-oil flame for a first preset time period, it is determined that the burner is in a micro-oil ignition failure state.

[0054] The micro-oil flame detection device can be installed on the burner outlet side to detect the micro-oil flame. This location is the core flame generation area for micro-oil ignition, and it can directly and accurately capture the true combustion state of the micro-oil flame, avoiding signal distortion caused by detection position deviation. For example, the micro-oil flame detection device can be an ultraviolet (UV) flame detector.

[0055] During the micro-oil ignition process in power plant boilers, brief periods of no flame signal may occur due to factors such as airflow disturbances in the furnace, instantaneous pressure fluctuations in the fuel pipeline, and instantaneous signal drift of the micro-oil flame detection device, even though the micro-oil ignition has not actually failed. Therefore, this embodiment sets a first preset duration to avoid misjudgment.

[0056] The first preset duration can be adapted to meet the requirements of the micro-oil ignition protection method for boiler equipment provided in the embodiments of the present invention, and the comparison of the embodiments of the present invention is not limited.

[0057] In some embodiments, determining that the boiler is in a non-combustion state includes:

[0058] The fuel flame inside the boiler is detected in real time using a fuel flame detection device.

[0059] If the fuel flame detection device fails to detect a fuel flame for a second preset period of time, it is determined that the boiler is in a non-combustion state.

[0060] Specifically, the fuel flame detection device is a pulverized coal flame detector (also called a coal flame detector) specifically designed for power plant boilers. It is suitable for harsh operating conditions in the furnace, characterized by high temperatures, high dust levels, and large flame fluctuations. Its core detection target is the main pulverized coal flame formed within the boiler furnace after the pulverized coal ejected from the burner is ignited by a micro-oil flame. This is the core flame responsible for the boiler's actual combustion and is a crucial indicator of whether the boiler is truly burning. For example, the fuel flame detection device can be installed on the inner wall of the boiler, allowing direct capture of the pulverized coal flame's combustion state, thereby obtaining the boiler's main combustion dynamics.

[0061] The pulverized coal flame in power plant boilers is easily affected by factors such as furnace airflow disturbances, instantaneous changes in pulverized coal concentration, and fluctuations in the calorific value of the coal type. This can easily lead to brief flame flickering or no-flame signals, even though the actual pulverized coal combustion has not been completely extinguished (e.g., a sudden reduction in the pulverized coal feed rate causes the flame to weaken, resulting in a brief no-flame signal from the flame detector). Therefore, this embodiment sets a second preset duration to avoid misjudgments.

[0062] The second preset duration can be adapted to meet the requirements of the micro-oil ignition protection method for boiler equipment provided in the embodiments of the present invention, and the comparison of the embodiments of the present invention is not limited.

[0063] In some embodiments, when it is determined that fuel accumulation conditions are met based on the detected micro-oil ignition state and the combustion state, the micro-oil ignition protection method for boiler equipment further includes:

[0064] Control the alarm device to send an alarm signal.

[0065] Specifically, when the boiler experiences "disappearance of ignition source (failure of micro-oil ignition) + main combustion extinguishing (no pulverized coal flame), pulverized coal continues to enter the furnace and accumulates, posing a risk of deflagration," i.e., when the fuel accumulation condition is met, the alarm device will be activated to alert the staff.

[0066] In some embodiments, after controlling the valve body on the supply pipeline to be in a closed state, the method for micro-oil ignition protection of boiler equipment further includes:

[0067] The connection between the fuel supply equipment and the supply pipeline is switched from a connected state to an isolated state.

[0068] Specifically, in order to prevent the valve body from failing, fuel (pulverized coal) will continue to enter the furnace through the gaps, which will still cause unburned pulverized coal to accumulate and make it impossible to completely eliminate the risk of deflagration.

[0069] In this embodiment, after the valve body is closed, the connection between the fuel supply equipment and the pipeline (the source node of fuel transportation) is isolated, which is a backup protection for the valve body closure. Even if the valve body fails, the fuel transportation path can be cut off from the source to achieve a complete fuel supply cut-off, making the fuel cut-off protection action redundant.

[0070] Based on the same inventive concept, this embodiment of the invention also provides a micro-oil ignition protection device for boiler equipment, the boiler equipment including a boiler and a burner, the burner being connected to a fuel supply device via a supply pipeline to supply fuel to the boiler. Figure 2 This is a schematic diagram of a micro-oil ignition protection device for boiler equipment provided in an embodiment of the present invention, as shown below. Figure 2As shown, the protection device includes: an opening module 21, used to open the micro-oil ignition mode of the burner when the valve body on the supply pipeline is in the open state; an acquisition module 22, used to acquire the micro-oil ignition state of the burner and the combustion state of the boiler in real time under the micro-oil ignition mode; and a control module 23, used to determine that the fuel accumulation conditions are met based on the micro-oil ignition state and the combustion state, and control the valve body on the supply pipeline to be in the closed state.

[0071] The oil ignition protection device for boiler equipment provided in the above embodiments can perform the oil ignition protection method for boiler equipment provided in the above embodiments and has the same or corresponding beneficial effects, which will not be described in detail here.

[0072] This invention also provides a storage medium that stores a program or instructions that cause a computer to execute the steps of the micro-oil ignition protection method for boiler equipment provided in the above embodiments.

[0073] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of the various embodiments of the present invention.

[0074] Based on the above embodiments, this invention also provides an electronic device. Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Figure 3 As shown, the electronic device includes a processor 401 and a memory 402. The processor 401 executes programs or instructions stored in the memory, such as... Figure 1 The steps of the micro-oil ignition protection method for boiler equipment described herein have the beneficial effects of the above embodiments, and will not be repeated here.

[0075] like Figure 3As shown, an electronic device may include at least one processor 401, at least one memory 402, and at least one communication interface 403. The various components in the electronic device are coupled together via a bus system 404. The communication interface 403 is used for information transmission with external devices. It is understood that the bus system 404 is used to implement communication between these components. In addition to a data bus, the bus system 404 also includes a power bus, a control bus, and a status signal bus. However, for clarity, in… Figure 3 The general designated all buses as Bus System 404.

[0076] It is understood that the memory 402 in this embodiment can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. In some embodiments, the memory 402 stores the following elements: executable units or data structures, or subsets thereof, or extended sets thereof, operating systems, and applications. In this embodiment of the invention, the processor 401 executes the steps of the various embodiments of the method provided in this embodiment of the invention by calling the programs or instructions stored in the memory 402.

[0077] The method provided in this embodiment of the invention can be applied to processor 401, or implemented by processor 401. Processor 401 can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by integrated logic circuits in the hardware of processor 401 or by instructions in software form. The processor 401 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor can be a microprocessor or any conventional processor.

[0078] The steps of the method provided in this embodiment of the invention can be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software units in the decoding processor. The software units can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 402, and processor 401 reads the information in memory 402 and combines it with its hardware to complete the steps of the method.

[0079] The electronic device may also include one or more physical components to execute instructions generated by the processor 401 when performing the methods provided in this embodiment of the invention. Different physical components may be located within the electronic device or outside the electronic device, such as in a cloud server. Each physical component, together with the processor 401 and the memory 402, works to realize the functions of the electronic device in this embodiment.

[0080] The terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0081] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the foregoing inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions as those in the present invention.

Claims

1. A method for protecting a boiler from oil ignition, the boiler comprising a boiler and a burner, the burner being connected to a fuel supply device via a supply pipe to supply fuel to the boiler; characterized in that, The protection method includes: When the valve body on the supply pipeline is in the open position, the burner's micro-oil ignition mode is activated. In the micro-oil ignition mode, the micro-oil ignition status of the burner and the combustion status of the boiler are acquired in real time. Based on the micro-oil ignition state and the combustion state, it is determined that the fuel accumulation condition is met, and the valve body on the supply pipeline is controlled to be in the closed state.

2. The method for micro-oil ignition protection for boiler equipment according to claim 1, characterized in that, Based on the detection of the micro-oil ignition state and the combustion state, it is determined that the fuel accumulation conditions are met, and the valve body on the supply pipeline is controlled to be in a closed state, including: If it is determined that the burner is in a state of micro-oil ignition failure and the boiler is in a state of no combustion, the valve body on the supply pipeline is controlled to be in a closed state.

3. The method for micro-oil ignition protection of boiler equipment according to claim 2, characterized in that, Determining that the burner is in a state of micro-oil ignition failure includes: The micro-oil flame at the burner outlet is detected in real time using a micro-oil flame detection device. If the micro-oil flame detection device fails to detect a micro-oil flame for a first preset time period, it is determined that the burner is in a micro-oil ignition failure state.

4. The method for micro-oil ignition protection for boiler equipment according to claim 2, characterized in that, Determining that the boiler is in a non-combustion state includes: The fuel flame inside the boiler is detected in real time using a fuel flame detection device. If the fuel flame detection device fails to detect a fuel flame for a second preset period of time, it is determined that the boiler is in a non-combustion state.

5. The method for micro-oil ignition protection for boiler equipment according to claim 1, characterized in that, When determining that the fuel accumulation conditions are met based on the detected micro-oil ignition state and the combustion state, the method further includes: Control the alarm device to send an alarm signal.

6. The method for micro-oil ignition protection for boiler equipment according to claim 1, characterized in that, After controlling the valve body on the supply pipeline to be in the closed state, the method further includes: The connection between the fuel supply equipment and the supply pipeline is switched from a connected state to an isolated state.

7. A micro-oil ignition protection device for a boiler, the boiler comprising a boiler and a burner, the burner being connected to a fuel supply device via a supply pipe to supply fuel to the boiler; characterized in that, The protective device includes: The activation module is used to activate the micro-oil ignition mode of the burner when the valve body on the supply pipeline is in the open state. The acquisition module is used to acquire the micro-oil ignition state of the burner and the combustion state of the boiler in real time under the micro-oil ignition mode. The control module is used to determine whether the fuel accumulation conditions are met based on the micro-oil ignition state and the combustion state, and to control the valve body on the supply pipeline to be in the closed state.

8. An electronic device, characterized in that, It includes a processor and a memory, wherein the processor executes the steps of the micro-oil ignition protection method for boiler equipment as described in any one of claims 1 to 6 by calling programs or instructions stored in the memory.

9. A storage medium, characterized in that, The storage medium stores a program or instructions that cause a computer to perform the steps of the micro-oil ignition protection method for boiler equipment as described in any one of claims 1 to 6.

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