Tiny-oil ignition combustion equipment

Abstract

The invention provides a tiny-oil ignition combustion device which comprises a tiny-oil burner, a tiny-oil ignition device, a tiny-oil ignition device, a tiny-oil ignition device and a tiny-oil ignition device. The flame detection probe is arranged at the tiny-oil burner so as to capture a flame signal of the tiny-oil burner; the optical fiber component is connected with the flame detection probe, so that flame detection signals are transmitted through the optical fiber component, and the problems that in the prior art, an atomizing spray head is short in service life and high in replacement frequency are solved.

Description

Technical Field

[0001] The invention relates to the technical field of boiler combustion, in particular to a micro-oil ignition and combustion device. Background Art

[0002] As an important energy equipment in the fields of electricity, industry and heating, the efficient and stable operation of coal-fired boilers is of great significance to energy conservation, emission reduction and reduction of operating costs. During the startup, shutdown and low-load operation of coal-fired boilers, the ignition and combustion efficiency directly affects the startup speed and energy consumption level of the entire system. At present, the ignition technology of coal-fired boilers mainly includes plasma ignition devices and micro-oil gasified coal powder ignition devices. Although these two technologies have improved the ignition efficiency and reliability to a certain extent, they are usually only suitable for high-quality bituminous coal, and the ignition effect is not good for lignite, bituminous coal, lean coal and anthracite.

[0003] In particular, the micro-oil gasified pulverized coal ignition device, although its original design intention was to reduce diesel consumption during the ignition stage, in actual application, due to the unreasonable position of the fire detection probe, it is impossible to accurately capture the flame signal of the micro-oil burner, resulting in a high ignition failure rate, and has to rely on large oil guns with high oil consumption for ignition. In addition, the unstable operation of the micro-oil ignition system also increases diesel consumption and energy consumption, which is a technical bottleneck that needs to be solved urgently for coal-fired boilers that pursue efficient and environmentally friendly operation.

[0004] Therefore, developing a burner technology that is suitable for a variety of coal types and can stably and efficiently ignite is of great practical significance for improving the operating efficiency of coal-fired boilers, reducing energy consumption, and reducing environmental pollution. Based on this background, the present invention proposes an improved coal-fired boiler double-strength coal powder micro-oil ignition burner in view of the limitations of the existing micro-oil ignition device, aiming to solve the above problems, improve the ignition success rate, reduce oil consumption, and achieve efficient and environmentally friendly operation of coal-fired boilers. Summary of the invention

[0005] The main purpose of the present invention is to provide a micro-oil ignition and combustion device to solve the problem of low efficiency of micro-oil ignition and combustion devices in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a micro-oil ignition and combustion device is provided, including a micro-oil burner for generating a high-temperature flame; a flame detection probe, which is arranged at the micro-oil burner to capture the flame signal of the micro-oil burner; and an optical fiber component, which is connected to the fire detection probe and transmits the flame detection signal through the optical fiber component.

[0007] Furthermore, the micro-oil ignition and combustion equipment also includes a pulverized coal burner, which is arranged inside the pulverized coal burner. The fire detection probe is axially inserted into the pulverized coal burner from the rear side of the primary air duct elbow of the pulverized coal burner and positioned at the micro-oil burner.

[0008] Furthermore, the micro-oil ignition and combustion device also includes a sleeve, which is sleeved on the outside of the optical fiber component.

[0009] Further, the sleeve is clearance-matched with the optical fiber component; and / or the sleeve is a straight tube; and / or the sleeve is made of corrosion-resistant material.

[0010] Furthermore, the micro-oil ignition and combustion equipment also includes a pulverized coal burner, the micro-oil burner is arranged in the pulverized coal burner, and at least a part of the sleeve is fixed in the pulverized coal burner.

[0011] Furthermore, the micro-oil ignition and combustion equipment also includes a pulverized coal burner, and the micro-oil burner is arranged inside the pulverized coal burner; wherein the sleeve is connected to the pulverized coal burner by welding, threaded connection or snap-on fixing.

[0012] Furthermore, the micro-oil ignition and combustion equipment also includes a fire detection cooling air system, the cooling air inlet of the fire detection cooling air system is used to connect with the compressed air pipeline, and the cooling air outlet of the fire detection cooling air system is used to blow cold air to the fire detection probe.

[0013] Furthermore, the micro-oil ignition and combustion equipment also includes a sleeve, which is sleeved on the outside of the optical fiber component; wherein the cooling air outlet of the fire detection cooling air system is connected to the sleeve.

[0014] Furthermore, the cooling air inlet of the fire detection cooling air system is provided with a cooling valve, and the cooling air flow rate is controlled by the cooling valve; and / or the fire detection cooling air system also includes a filtering device for filtering the airflow in the fire detection cooling air system.

[0015] Furthermore, the length of the optical fiber component is 215 mm; and / or an anti-breakage protection measure is provided on the optical fiber component.

[0016] By applying the technical solution of the present invention, the micro-oil ignition and combustion equipment of the present invention comprises a micro-oil burner for generating a high-temperature flame; a fire detection probe arranged at the micro-oil burner to capture the flame signal of the micro-oil burner; and an optical fiber component connected to the fire detection probe to transmit the flame detection signal through the optical fiber component. In this way, the present invention realizes real-time and accurate detection of the flame of the micro-oil burner by directly arranging the fire detection probe at the micro-oil burner and connecting the fire detection probe to the control system by using the optical fiber component. This design overcomes the problem of inaccurate detection caused by the remote location of the fire detection probe in the traditional ignition system, especially in the process of coal mill powder feeding, part of the flame may be blocked by the air-powder mixture. The fire detection probe of the present invention can capture the flame signal of the micro-oil burner more directly and effectively to ensure the success rate of ignition; by using the optical fiber component to transmit the fire detection signal, not only the accuracy and reliability of the signal transmission are improved, but also the interference and loss in the signal transmission process are reduced, and the stable transmission of the fire detection signal can be maintained even in a harsh industrial environment. The problem of low efficiency of the micro-oil ignition and combustion equipment in the prior art is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 The overall structural schematic diagram of an embodiment of a micro-oil ignition and combustion device according to the present invention is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Micro-oil burner; 20. Fire detection probe; 30. Optical fiber component; 40. Pulverized coal burner; 50. Duct elbow; 60. Casing. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] like Figure 1 As shown, the micro-oil ignition and combustion equipment of the present invention includes: a micro-oil burner 10, which is used to generate a high-temperature flame; a flame detection probe 20, which is arranged at the micro-oil burner 10 to capture the flame signal of the micro-oil burner; and an optical fiber component 30, which is connected to the fire detection probe 20 to transmit the flame detection signal through the optical fiber component 30.

[0023] It can be seen that the present invention realizes real-time and accurate detection of the flame of the micro-oil burner by directly setting a fire detection probe at the micro-oil burner and connecting the fire detection probe to the control system using an optical fiber component. This design overcomes the problem of inaccurate detection caused by the remote location of the fire detection probe in the traditional ignition system, especially in the process of coal mill powder feeding, part of the flame may be blocked by the air-powder mixture. The fire detection probe of the present invention can capture the flame signal of the micro-oil burner more directly and effectively to ensure the success rate of ignition; by using optical fiber components to transmit the fire detection signal, not only the accuracy and reliability of the signal transmission are improved, but also the interference and loss in the signal transmission process are reduced, and the stable transmission of the fire detection signal can be maintained even in harsh industrial environments. It effectively solves the problem of low efficiency of micro-oil ignition and combustion equipment in the prior art.

[0024] Specifically, the micro-oil ignition and combustion equipment also includes a pulverized coal burner 40, the micro-oil burner 10 is arranged in the pulverized coal burner 40, and the fire detection probe 20 is inserted into the pulverized coal burner 40 along the axial direction from the rear side of the primary air duct elbow 50 of the pulverized coal burner 40, and is positioned at the micro-oil burner 10. The high-temperature flame generated by the micro-oil burner directly acts on the primary air and powder of the pulverized coal burner, which can more accurately control the ignition process of the pulverized coal, improve the ignition efficiency and success rate; the fire detection probe is positioned at the micro-oil burner, which can directly and accurately capture the flame signal generated by the micro-oil burner, avoid the shielding and interference of the air-powder mixture on the flame detection, and improve the accuracy and reliability of the flame detection.

[0025] Preferably, the micro-oil ignition and combustion device further comprises a sleeve 60, which is sleeved on the outside of the optical fiber component 30. The sleeve can effectively protect the optical fiber component from direct impact and wear of the primary high-temperature airflow, extend the service life of the optical fiber component, and reduce maintenance and replacement costs; it can also reduce the influence of external environmental factors such as temperature changes, vibrations, and air-powder mixtures on optical fiber signal transmission, and ensure the stability and accuracy of the fire detection signal.

[0026] Specifically, the sleeve 60 is clearance-fitted with the optical fiber component 30 , and the clearance-fitting sleeve design provides an additional protective layer for the optical fiber, effectively preventing direct damage to the optical fiber caused by high temperature, high pressure environment and vibration.

[0027] In one embodiment of the present invention, the sleeve 60 is a straight tube. The straight tube structure reduces the bending and breakage that the optical fiber may encounter during the transmission process, ensuring the integrity of the optical fiber and the continuity of signal transmission.

[0028] Preferably, the sleeve 60 is made of corrosion-resistant material. The sleeve made of corrosion-resistant material can effectively resist high-temperature corrosion and chemical corrosion generated during the combustion process, extend the service life of the sleeve itself, reduce the frequency of maintenance and replacement, and reduce the operating cost of the equipment.

[0029] like Figure 1 As shown, the micro-oil ignition combustion equipment also includes a pulverized coal burner 40, the micro-oil burner 10 is arranged in the pulverized coal burner 40, and at least part of the sleeve 60 is fixed in the pulverized coal burner 40. On the one hand, fixing the sleeve in the pulverized coal burner can ensure the stability of the position of the optical fiber component during the combustion process, avoid the optical fiber position deviation caused by equipment vibration or air flow impact inside the pulverized coal burner, and ensure that the fire detection probe can continuously and accurately capture the flame signal of the micro-oil burner; on the other hand, the fixed installation design of the sleeve makes it easier to access the optical fiber component and the fire detection probe during equipment maintenance and overhaul, which simplifies the maintenance process, reduces equipment downtime, and improves the maintainability and operation efficiency of the equipment.

[0030] Optionally, the micro-oil ignition combustion device further includes a pulverized coal burner 40, and the micro-oil burner 10 is arranged in the pulverized coal burner 40; wherein the sleeve 60 is connected to the pulverized coal burner 40 by welding, threaded connection or snap-on fixing. Welding, threaded connection or snap-on fixing can ensure a firm connection between the sleeve and the pulverized coal burner, improve the structural stability of the equipment under high temperature, high pressure and vibration environment, avoid loosening or damage of the connection part due to thermal expansion and contraction or long-term operation; reduce the direct impact of the external environment such as pulverized coal and high-temperature airflow on the optical fiber components, improve the safety of the equipment, and reduce the occurrence rate of failures.

[0031] The micro-oil ignition and combustion equipment of the present invention further comprises a fire detection cooling air system, the cooling air inlet of the fire detection cooling air system is used to communicate with the compressed air pipeline, and the cooling air outlet of the fire detection cooling air system is used to blow cold air to the fire detection probe 20. The fire detection cooling air system can provide continuous cooling air flow to the fire detection probe, effectively reduce the working temperature of the fire detection probe in a high-temperature combustion environment, prevent it from being damaged due to overheating, extend the service life of the fire detection probe, and reduce maintenance costs; the introduction of cooling air improves the reliability of the entire ignition system, especially in the boiler startup, shutdown or low-load stable combustion stage, the fire detection cooling air system can ensure that the fire detection probe works normally during these critical periods, reducing the possibility of ignition failure.

[0032] Preferably, the micro-oil ignition and combustion device further comprises a sleeve 60, which is sleeved on the outside of the optical fiber component 30; wherein the cooling air outlet of the flame detection cooling air system is connected with the sleeve 60. The cooling air directly acts on the inside of the sleeve, which can quickly reduce the temperature around the optical fiber component, prevent high temperature from damaging the physical structure and signal transmission performance of the optical fiber, extend the service life of the optical fiber component, and ensure the stability of signal detection during the ignition and combustion process; wherein the cooling air provides a clean environment for the optical fiber component, reduces the contamination of the optical fiber component by fly ash, coal powder and other impurities generated by combustion, avoids interference in signal transmission, and improves the accuracy and reliability of flame detection.

[0033] In one embodiment of the present aspect, a cooling valve is provided at the cooling air inlet of the fire detection cooling air system to control the cooling air flow rate through the cooling valve. The use of the cooling valve allows the operator to accurately control the cooling air flow rate, ensuring that the fire detection probe and its optical fiber components operate at the optimal temperature, preventing overcooling or overheating, and optimizing the cooling efficiency and equipment performance; by adjusting the cooling air flow rate through the cooling valve, it is possible to avoid unnecessary air consumption while ensuring the cooling effect, reduce operating costs, and improve the energy efficiency of the system.

[0034] Specifically, the fire detection cooling air system also includes a filtering device for filtering the airflow within the fire detection cooling air system. The filtering device can remove particulate matter and impurities in the cooling air, provide a clean air flow, and protect the fire detection probe and optical fiber components from contamination, thereby extending the service life of these components and reducing the maintenance frequency; it reduces the interference of fire detection signals caused by impurities in the combustion environment, improves the accuracy and reliability of flame detection, and thus enhances the stability of the micro-oil ignition combustion process.

[0035] In the embodiment of the present aspect, the length of the optical fiber component 30 is 215 mm. The optical fiber component length of 215 mm is carefully designed to ensure that the flame detection probe can accurately capture the core area of ​​the flame signal of the micro-oil burner, thereby optimizing the sensitivity and accuracy of flame detection.

[0036] Preferably, an anti-breakage protection measure is provided on the optical fiber component 30. The optical fiber component is easily damaged in an environment of high temperature, high pressure and vibration. The anti-breakage protection measure can effectively reduce physical stress, prevent the optical fiber from being damaged due to bending and squeezing, and extend the service life of the optical fiber component.

[0037] By standardizing the length of the optical fiber component to 215 mm and implementing anti-breakage protection measures, the micro-oil ignition and combustion equipment of the present invention not only improves the accuracy and stability of flame detection, but also enhances the durability of the optical fiber component and the signal transmission quality, simplifies the maintenance of the equipment, and has a significant effect on achieving efficient and safe ignition and combustion control of coal-fired boilers.

[0038] The micro-oil burner 10 of the present invention is axially inserted into the pulverized coal burner 40 from the rear of the primary air duct elbow 50. During ignition, the high-temperature oil flame after enhanced combustion instantly heats the primary air powder passing through the pulverized coal burner 40 to the ignition temperature of the pulverized coal. The primary air-powder mixture is impacted by the high-temperature flame, and the volatile matter is rapidly precipitated and starts to burn. The combustion of the volatile matter releases a large amount of heat, which supplements the heat consumed during this period, and continuously heats the primary air powder to a temperature higher than the ignition temperature of the coal, so that the carbon particles in the pulverized coal begin to burn, forming a high-temperature torch that sprays into the furnace. The micro-oil ignition oil burner is a low-pressure forced air supply oil burner developed from the high-pressure forced air supply oil burner of the aircraft engine. It emits a high-temperature flame through graded forced air supply. The flame surface temperature is measured to be 1520°C, the center temperature is not less than 1800°C, and the oil burnout rate is more than 99%.

[0039] The fire detection probe 20 is extended from the tail end of the ignition device to the micro-oil burner 10, and the optical fiber is used to transmit the fire detection signal. The optical fiber extension length is 215mm to ensure that the fire detection probe 20 can effectively capture the flame signal of the micro-oil burner 10, and use a flashlight to detect the normal transmission of the fire detection signal. At the same time, a sleeve 60 is added to the outside of the optical fiber to prevent the optical fiber from being damaged by primary wind. The factory compressed air pipeline next to the micro-oil burner 10 introduces an air source as fire detection cooling air to cool the fire detection probe 20 extending to the burner, and a manual valve is set at the fire detection air inlet to control the fire detection air flow.

[0040] The advantages of the micro-oil ignition burner of the present invention are as follows:

[0041] 1. Effectively solved the problem of ignition failure of the original micro-oil system.

[0042] 2. Solved the problem of unstable operation of the boiler micro-oil ignition system in the early stage.

[0043] 3. Solved the problem of unstable heating rate of micro-oil ignition boiler.

[0044] 4. It solves the problem that a large oil gun needs to be used for ignition every time the boiler is started, resulting in high diesel consumption and high energy consumption.

[0045] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0046] The micro-oil ignition and combustion equipment of the present invention comprises: a micro-oil burner 10, which is used to generate a high-temperature flame; a flame detection probe 20, which is arranged at the micro-oil burner 10 to capture the flame signal of the micro-oil burner; and an optical fiber component 30, which is connected to the flame detection probe 20 to transmit the flame detection signal through the optical fiber component 30.

[0047] It can be seen that the present invention realizes real-time and accurate detection of the flame of the micro-oil burner by directly setting a fire detection probe at the micro-oil burner and connecting the fire detection probe to the control system using an optical fiber component. This design overcomes the problem of inaccurate detection caused by the remote location of the fire detection probe in the traditional ignition system, especially in the process of coal mill powder feeding, part of the flame may be blocked by the air-powder mixture. The fire detection probe of the present invention can capture the flame signal of the micro-oil burner more directly and effectively to ensure the success rate of ignition; by using optical fiber components to transmit the fire detection signal, not only the accuracy and reliability of the signal transmission are improved, but also the interference and loss in the signal transmission process are reduced, and the stable transmission of the fire detection signal can be maintained even in harsh industrial environments. It effectively solves the problem of low efficiency of micro-oil ignition and combustion equipment in the prior art.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0049] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0050] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0052] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A micro-oil ignition and combustion device, characterized in that: include: A micro-oil burner (10), the micro-oil burner (10) being used to generate a high-temperature flame; A flame detection probe (20) is arranged at the micro-oil burner (10) to capture a flame signal of the micro-oil burner; An optical fiber component (30) is connected to the flame detection probe (20) so as to transmit a flame detection signal through the optical fiber component (30).

2. The micro-oil ignition and combustion equipment according to claim 1, characterized in that: The micro-oil ignition combustion equipment also includes a pulverized coal burner (40), the micro-oil burner (10) is arranged in the pulverized coal burner (40), and the fire detection probe (20) is inserted into the pulverized coal burner (40) along the axial direction from the rear side of the primary air duct elbow (50) of the pulverized coal burner (40) and is positioned at the micro-oil burner (10).

3. The micro-oil ignition and combustion equipment according to claim 1, characterized in that: The micro-oil ignition and combustion device further comprises a sleeve (60), wherein the sleeve (60) is sleeved on the outside of the optical fiber component (30).

4. The micro-oil ignition and combustion equipment according to claim 3 is characterized in that: The sleeve (60) is clearance-matched with the optical fiber component (30); and / or the sleeve (60) is a straight tube; and / or the sleeve (60) is made of corrosion-resistant material.

5. The micro-oil ignition and combustion equipment according to claim 3, characterized in that: The micro-oil ignition combustion equipment further comprises a pulverized coal burner (40), the micro-oil burner (10) is arranged in the pulverized coal burner (40), and at least a part of the sleeve (60) is fixed in the pulverized coal burner (40).

6. The micro-oil ignition and combustion equipment according to claim 3, characterized in that: The micro-oil ignition combustion equipment also includes a pulverized coal burner (40), wherein the micro-oil burner (10) is arranged inside the pulverized coal burner (40); wherein the sleeve (60) is connected to the pulverized coal burner (40) by welding, threaded connection or snap-on fixing.

7. The micro-oil ignition and combustion equipment according to claim 1, characterized in that: The micro-oil ignition and combustion equipment also comprises a fire detection cooling air system, wherein the cooling air inlet of the fire detection cooling air system is used to communicate with a compressed air pipeline, and the cooling air outlet of the fire detection cooling air system is used to blow cold air toward the fire detection probe (20).

8. The micro-oil ignition and combustion equipment according to claim 7, characterized in that: The micro-oil ignition and combustion equipment further comprises a sleeve (60), wherein the sleeve (60) is sleeved on the outside of the optical fiber component (30); wherein the cooling air outlet of the fire detection cooling air system is in communication with the sleeve (60).

9. The micro-oil ignition and combustion equipment according to claim 7, characterized in that: The cooling air inlet of the fire detection cooling air system is provided with a cooling valve to control the cooling air flow through the cooling valve; and / or the fire detection cooling air system further includes a filtering device for filtering the airflow in the fire detection cooling air system.

10. The micro-oil ignition combustion equipment according to any one of claims 1 to 8, characterized in that: The length of the optical fiber component (30) is 215 mm; and / or an anti-breakage protection measure is provided on the optical fiber component (30).

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