A boiler flame detection device for a thermal power plant

Abstract

The utility model relates to a thermal power plant combustion monitoring technical field discloses a kind of thermal power plant furnace hearth flame detection devices, including shell, the inner wall of the shell is provided with detection assembly, the inside of the shell is provided with processing assembly, the outside fixed connection of the processing assembly has lens frame, the outside of the lens frame is provided with wide-angle lens, the inner wall of the shell is fixedly connected outside ultraviolet sensor, the inner wall of the shell is fixedly connected with infrared sensor, the inner wall of the shell is fixedly connected outside logic unit, the inner wall of the shell is fixedly connected with converter.In the utility model, the ultraviolet and infrared radiation signals of furnace hearth flame are collected by wide-angle lens, the signals are converted into analog electrical signals by ultraviolet sensor and infrared sensor, transmitted to converter for AD conversion into digital signals, then processed by logic unit, so that the effect of double-spectrum detection can be achieved to improve the accuracy of flame recognition and reduce the false alarm rate.

Description

Technical Field

[0001] This utility model relates to the field of combustion monitoring technology in thermal power plants, and in particular to a furnace flame detection device for thermal power plants. Background Technology

[0002] A furnace flame detection device is an automated device used in the furnace of a thermal power plant boiler to monitor the presence, intensity, distribution, and other characteristics of the flame in real time. Its core function is to collect flame signals through multi-dimensional sensors and combine signal processing and analysis technology to determine whether the flame combustion condition is normal. Furnace flame detection in thermal power plants is a key link in ensuring the safe operation of boilers and avoiding unnecessary shutdowns caused by false alarms or safety accidents such as flameouts and deflagrations caused by missed detections.

[0003] A search revealed Chinese Patent Publication No. CN222278650U, which discloses a full-furnace infrared flame detection device. The device includes a furnace wall and a focusing trough that passes through the furnace wall. The focusing trough comprises a glass cover, a first concave reflector, a second concave reflector, a support, an outer tube, and a tubular reflective layer. The second concave reflector is mounted on the inner concave surface of the support. The glass cover is mounted on the support, and the support and glass cover form a sealed cavity. The second concave reflector is located on one side of the sealed cavity. A circular hole is formed in the middle of the second concave reflector and the support. The first and second concave reflectors form a rotating annular receiving band that covers and sweeps across the entire space of the boiler in front. Light passes through the glass cover and strikes the second concave reflector, which then reflects and focuses the light onto the first concave reflector. The first concave reflector reflects and focuses the light onto the opening of the tubular reflective layer.

[0004] In the aforementioned application, the existing flame detection device uses infrared detectors to detect flames by capturing their infrared radiation. However, these detectors suffer from response delays and cannot distinguish between flames and high-temperature furnace wall radiation, leading to serious safety accidents due to delayed response. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a furnace flame detection device for thermal power plants, which aims to improve the problems of response delay and inability to distinguish between flame and high-temperature furnace wall radiation in the existing infrared detection technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a furnace flame detection device for a thermal power plant, comprising a housing, a detection component disposed on the inner wall of the housing, a processing component disposed inside the housing, a lens frame fixedly connected to the outside of the processing component, and a wide-angle lens disposed outside the lens frame.

[0007] The above technical solution involves using a stainless steel casing to protect the internal detection and processing components. These components are integrated inside the casing to enable the acquisition and processing of flame signals. A wide-angle lens expands the acquisition range of the furnace flame signals.

[0008] As a further description of the above technical solution:

[0009] The detection component includes an ultraviolet sensor, the ultraviolet sensor being externally fixedly connected to the inner wall of the housing, and an infrared sensor being fixedly connected to the inner wall of the housing.

[0010] The above technical solution forms a dual-spectrum detection structure with an ultraviolet sensor and an infrared sensor. The ultraviolet sensor is used to collect the ultraviolet radiation signal of the flame, and the infrared sensor is used to collect the infrared radiation signal of the flame. The two work together to obtain multi-dimensional feature data of the flame and improve the accuracy of flame identification.

[0011] As a further description of the above technical solution:

[0012] The processing component includes a logic unit, the logic unit being externally fixedly connected to the inner wall of the housing, and a converter being fixedly connected to the inner wall of the housing.

[0013] The above technical solution involves a signal processing module consisting of a logic unit and a converter. The logic unit is an FPGA logic unit used for signal processing and analysis, while the converter is an AD signal converter that can convert analog electrical signals into digital signals.

[0014] As a further description of the above technical solution:

[0015] The upper surface of the housing is provided with a cleaning component, the outside of the wide-angle lens is fixedly connected with a connecting ring, the outer wall of the connecting ring is provided with a snap hole, the inside of the lens frame is provided with a snap-fit ​​component, and the outside of the connecting ring is snapped into the inside of the lens frame.

[0016] The above technical solution involves a cleaning component for cleaning the surface of the wide-angle lens, a connecting ring for fixing the outside of the wide-angle lens, and a snap-fit ​​component inside the lens frame to secure the wide-angle lens to the lens frame, facilitating lens installation and positioning.

[0017] As a further description of the above technical solution:

[0018] The cleaning assembly includes a compressed air source, the lower surface of which is fixedly connected to the upper surface of the housing. An air supply pipe is fixedly connected to the output end of the compressed air source. A control valve is fixedly connected to the end of the air supply pipe away from the compressed air source. A nozzle is fixedly connected to one end of the control valve. The outside of the control valve is fixedly connected to the outside of the housing.

[0019] The above technical solution involves a compressed air source supplying compressed air to a control valve via an air delivery pipe. The control valve controls the flow of compressed air, and when open, the compressed air is sprayed onto the surface of the wide-angle lens through a nozzle, reducing the impact of lens contamination on testing and extending the lens maintenance cycle.

[0020] As a further description of the above technical solution:

[0021] The buckle assembly includes a spring, the outside of which is disposed inside the lens frame. A locking post is disposed inside the spring. A handle is fixedly connected to one end of the locking post. A compression ring is fixedly connected to the outside of the side of the locking post away from the handle. The outside of the compression ring is disposed at one end of the spring. The end of the locking post away from the handle is engaged inside the locking hole.

[0022] The above technical solution involves a locking pin that penetrates the interior of a spring. One end is operated via a handle, while the other end, away from the handle, can be engaged in a locking hole of a connecting ring. The spring force maintains the engagement. When the handle is operated, the compression ring compresses the spring, causing the locking pin to disengage from the locking hole, facilitating quick disassembly of the wide-angle lens by the operator.

[0023] As a further description of the above technical solution:

[0024] The logic unit is electrically connected to the converter, and both the ultraviolet sensor and the infrared sensor are electrically connected to the converter.

[0025] The above technical solution involves ultraviolet and infrared sensors transmitting the collected analog electrical signals to a converter, which then converts them into digital signals via an AD converter. These signals are then transmitted to a logic unit for processing and analysis, ultimately outputting a standard signal to the control system.

[0026] As a further description of the above technical solution:

[0027] The compression ring is externally slidably connected to the inside of the lens frame.

[0028] Through the above technical solution, the lens frame serves to support the compression ring as it slides inside the lens frame.

[0029] This utility model has the following beneficial effects:

[0030] 1. In this utility model, ultraviolet and infrared radiation signals of furnace flames are collected by a wide-angle lens. The signals are converted into analog electrical signals by ultraviolet and infrared sensors, transmitted to a converter for AD conversion into digital signals, and then processed and analyzed by a logic unit to output a standard signal to the control system. This achieves the effect of dual-spectrum detection, which improves the accuracy of flame identification and reduces the false alarm rate.

[0031] 2. In this utility model, the compressed air source supplies compressed air to the control air valve through the air supply pipe. When the control air valve is opened, the compressed air is sprayed onto the surface of the wide-angle lens through the nozzle to remove dust and other adhering substances, thereby achieving the effect of extending the maintenance cycle of the wide-angle lens.

[0032] 3. In this utility model, the operating handle drives the locking pin to move, and at the same time the compression ring compresses the spring. After the locking pin disengages from the locking hole, the connecting ring and the wide-angle lens can be taken out from the inside of the lens frame. This can facilitate the operator to quickly disassemble the wide-angle lens and improve the maintenance and portability of the wide-angle lens. Attached Figure Description

[0033] Figure 1 This is a perspective view of a furnace flame detection device for a thermal power plant proposed in this utility model;

[0034] Figure 2 This is a partial structural diagram of an ultraviolet sensor for a furnace flame detection device in a thermal power plant, as proposed in this utility model.

[0035] Figure 3 This is a partial structural diagram of the compressed air source for a furnace flame detection device in a thermal power plant, as proposed in this utility model.

[0036] Figure 4 This is a partial structural diagram of a wide-angle lens for a thermal power plant furnace flame detection device proposed in this utility model;

[0037] Figure 5 This is a schematic diagram of a partial structure of the pin of a furnace flame detection device for a thermal power plant proposed in this utility model.

[0038] Legend:

[0039] 1. Housing; 2. Detection component; 201. Ultraviolet sensor; 202. Infrared sensor; 3. Processing component; 301. Logic unit; 302. Converter; 4. Lens frame; 5. Cleaning component; 501. Compressed air source; 502. Air supply pipe; 503. Control valve; 504. Nozzle; 6. Wide-angle lens; 7. Connecting ring; 8. Locking hole; 9. Snap-fit ​​component; 901. Spring; 902. Locking post; 903. Handle; 904. Compression ring. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Reference Figures 1-3 An embodiment of this utility model is provided: a furnace flame detection device for a thermal power plant, including a housing 1, a detection component 2 disposed on the inner wall of the housing 1, a processing component 3 disposed inside the housing 1, a lens frame 4 fixedly connected to the outside of the processing component 3, and a wide-angle lens 6 disposed outside the lens frame 4.

[0042] Specifically, the housing 1 is made of stainless steel and is used to protect the internal detection component 2 and processing component 3. The detection component 2 is used to collect flame characteristic signals, and the processing component 3 is used to process the signals. The lens frame 4 is used to fix the wide-angle lens 6, and the wide-angle lens 6 is used to expand the range of flame signal acquisition.

[0043] Reference Figures 2-4 The detection component 2 includes an ultraviolet sensor 201, which is externally fixedly connected to the inner wall of the housing 1. An infrared sensor 202 is fixedly connected to the inner wall of the housing 1. The processing component 3 includes a logic unit 301, which is externally fixedly connected to the inner wall of the housing 1. A converter 302 is fixedly connected to the inner wall of the housing 1.

[0044] Specifically, the ultraviolet sensor 201 and the infrared sensor 202 are used to collect ultraviolet and infrared radiation signals from the flame. The logic unit 301 is an FPGA logic unit used to process and analyze the signals. The converter 302 is an AD signal converter used to convert analog signals into digital signals, thereby achieving the effect of dual-spectrum detection to improve the accuracy of flame recognition.

[0045] Reference Figures 3-5 The upper surface of the housing 1 is provided with a cleaning component 5. A connecting ring 7 is fixedly connected to the outside of the wide-angle lens 6. A locking hole 8 is opened on the outer wall of the connecting ring 7. A buckle component 9 is provided inside the lens frame 4. The outside of the connecting ring 7 is locked inside the lens frame 4. The buckle component 9 includes a spring 901. The outside of the spring 901 is located inside the lens frame 4. A locking post 902 is provided inside the spring 901. A handle 903 is fixedly connected to one end of the locking post 902. A compression ring 904 is fixedly connected to the outside of the side of the locking post 902 away from the handle 903. The outside of the compression ring 904 is located at one end of the spring 901. The end of the locking post 902 away from the handle 903 is locked inside the locking hole 8. The logic unit 301 is electrically connected to the converter 302. The ultraviolet sensor 201 and the infrared sensor 202 are both electrically connected to the converter 302. The outside of the compression ring 904 is slidably connected inside the lens frame 4.

[0046] Specifically, the connecting ring 7 is used to fix the wide-angle lens 6, the locking hole 8 serves to lock the locking post 902, the spring 901 provides elasticity to keep the locking post 902 locked inside the locking hole 8, the locking post 902 and the locking hole 8 cooperate to achieve the locking function, the compression ring 904 is used to compress the spring 901, the handle 903 is used to drive the locking post 902 out of the locking hole 8, the logic unit 301 is electrically connected to the converter 302 and the sensor for signal transmission and processing, and outputs signals to the control system, thereby achieving the effect of facilitating the operator to quickly disassemble the wide-angle lens 6.

[0047] Reference Figure 3 The cleaning component 5 includes a compressed air source 501. The lower surface of the compressed air source 501 is fixedly connected to the upper surface of the housing 1. An air supply pipe 502 is fixedly connected to the output end of the compressed air source 501. A control valve 503 is fixedly connected to the end of the air supply pipe 502 away from the compressed air source 501. A nozzle 504 is fixedly connected to one end of the control valve 503. The outside of the control valve 503 is fixedly connected to the outside of the housing 1.

[0048] Specifically, the compressed air source 501 is used to provide clean air, the air supply pipe 502 is used to transmit compressed air, the control valve 503 is used to control the on / off of compressed air, and the nozzle 504 is used to spray compressed air to clean the wide-angle lens 6, thereby extending the maintenance cycle of the wide-angle lens 6.

[0049] Working principle: When this thermal power plant furnace flame detection device is needed, the ultraviolet and infrared radiation signals of the furnace flame are first collected by the wide-angle lens 6. The signals are converted into analog electrical signals by the ultraviolet sensor 201 and the infrared sensor 202, and then transmitted to the converter 302 for AD conversion into digital signals. After being processed and analyzed by the logic unit 301, a standard signal is output to the control system, thereby achieving the effect of dual-spectrum detection to improve the accuracy of flame identification and reduce the false alarm rate.

[0050] Next, after the wide-angle lens 6 is inspected, the compressed air source 501 supplies compressed air to the control valve 503 through the air supply pipe 502. When the control valve 503 is opened, the compressed air is sprayed onto the surface of the wide-angle lens 6 through the nozzle 504 to remove dust and other adhering substances. When it is necessary to disassemble the wide-angle lens 6, pulling the handle 903 will move the locking post 902 away from the locking hole 8. At the same time, the compression ring 904 compresses the spring 901. After the locking post 902 is disengaged from the locking hole 8, the connecting ring 7 and the wide-angle lens 6 can be removed from the inside of the lens frame 4. This not only extends the maintenance cycle of the wide-angle lens 6, but also makes it convenient for operators to quickly disassemble the wide-angle lens 6.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A furnace flame detection device for a thermal power plant, comprising a housing (1), characterized in that: The inner wall of the housing (1) is provided with a detection component (2), the inside of the housing (1) is provided with a processing component (3), the outside of the processing component (3) is fixedly connected with a lens frame (4), and the outside of the lens frame (4) is provided with a wide-angle lens (6).

2. The furnace flame detection device for a thermal power plant according to claim 1, characterized in that: The detection component (2) includes an ultraviolet sensor (201), the outside of which is fixedly connected to the inner wall of the housing (1), and an infrared sensor (202) is fixedly connected to the inner wall of the housing (1).

3. The furnace flame detection device for a thermal power plant according to claim 2, characterized in that: The processing component (3) includes a logic unit (301), the logic unit (301) is externally fixedly connected to the inner wall of the housing (1), and a converter (302) is fixedly connected to the inner wall of the housing (1).

4. The furnace flame detection device for a thermal power plant according to claim 1, characterized in that: The upper surface of the housing (1) is provided with a cleaning component (5), the outside of the wide-angle lens (6) is fixedly connected with a connecting ring (7), the outer wall of the connecting ring (7) is provided with a snap hole (8), the inside of the lens frame (4) is provided with a snap fastener component (9), and the outside of the connecting ring (7) is snapped into the inside of the lens frame (4).

5. The furnace flame detection device for a thermal power plant according to claim 4, characterized in that: The cleaning component (5) includes a compressed air source (501), the lower surface of which is fixedly connected to the upper surface of the housing (1), the output end of which is fixedly connected to an air supply pipe (502), the end of which is away from the compressed air source (501) is fixedly connected to a control valve (503), the end of which is fixedly connected to a nozzle (504), and the outside of which is fixedly connected to the housing (1).

6. The furnace flame detection device for a thermal power plant according to claim 5, characterized in that: The buckle assembly (9) includes a spring (901), the outside of which is disposed inside the lens frame (4). A locking post (902) is disposed inside the spring (901). A handle (903) is fixedly connected to one end of the locking post (902). A compression ring (904) is fixedly connected to the outside of the side of the locking post (902) away from the handle (903). The outside of the compression ring (904) is disposed at one end of the spring (901). The end of the locking post (902) away from the handle (903) is engaged inside the locking hole (8).

7. The furnace flame detection device for a thermal power plant according to claim 3, characterized in that: The logic unit (301) is electrically connected to the converter (302), and both the ultraviolet sensor (201) and the infrared sensor (202) are electrically connected to the converter (302).

8. The furnace flame detection device for a thermal power plant according to claim 6, characterized in that: The compression ring (904) is externally slidably connected to the inside of the lens frame (4).

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