A boiler burner for oil field heating furnace

Abstract

The present invention discloses a boiler burner of an oilfield heating furnace, comprising a burner, an AI image recognition flame detector and a fire tube leakage detection device, wherein the AI ​​image recognition flame detector is fixed at the burner observation hole; the fire tube leakage detection device comprises a drop-in liquid level transmitter and a bracket, wherein the drop-in liquid level transmitter comprises a liquid level transmitter body, a liquid level probe and a pressure pipe connecting the transmitter body and the liquid level probe; the burner comprises a shell, wherein the liquid level transmitter body is fixed to the outside of the shell through a bracket, the pressure pipe passes through the shell, and the liquid level probe is arranged at the lower part of the shell inner cavity or in front of the shell inner cavity. The present invention can timely alarm after the fire tube of the oilfield heating furnace leaks oil, and judge whether there is an abnormal flame, so as to timely extinguish the fire caused by the oil leakage of the fire tube.

Description

[Technical field]

[0001] The invention relates to a boiler burner, in particular to a boiler burner of an oil field heating furnace. [Background Technology]

[0002] The oilfield heating furnace, also known as the fire tube furnace, is a widely used heating equipment in oilfields. It is used to heat the multiphase mixed liquid in oilfield production. The multiphase mixed liquid includes oil, water and other impurities. The oilfield heating furnace includes a furnace body and a fire tube. The fire tube is the main heating device of the heating furnace, including a fire tube, a burner and a smoke tube. The burner is installed on the outside of the furnace body, at the rear end of the fire tube. The fuel is ignited in the burner at the rear end of the fire tube and sprayed into the fire tube for combustion. The multiphase mixed liquid outside the fire tube exchanges heat with the outer wall of the fire tube through convection, realizing oil-water separation.

[0003] The invention with application number CN201110383554.0 discloses a gas burner, including a combustion head, a controller, a human-machine interaction device, an ignition device and a flame monitoring device installed on the combustion head, and a fuel device and an air supply device respectively connected to the controller; the air supply device includes a blowing device corresponding to the combustion head air inlet pipe and a wind pressure detection device and a fan driver installed on the combustion head air inlet pipe; the fan driver changes the air output of the blowing device by changing the frequency of the blowing device, and the fan driver is provided with a fan driver feedback; the wind pressure detection device, the fan driver feedback, the fan driver and the blowing device are respectively connected to the controller.

[0004] If the fire tube of an oilfield heating furnace is perforated, the multiphase mixed liquid will flow into the fire tube and cause a fire. The oilfield heating furnace also needs to be equipped with a flame detector. After the oilfield heating furnace leaks oil and stops firing, flame detection is performed to confirm whether there is an abnormal flame in the furnace caused by the fire tube leaking oil. The flame monitoring device of the above invention uses a flame sensor installed on the combustion head shell to monitor whether the gas burner is ignited successfully. The flame sensor used to detect ignition is an infrared sensor, which cannot determine whether there is an abnormal flame after the high-temperature furnace stops firing. In addition, the gas burner of the invention cannot determine whether the fire tube is leaking oil and when to start flame detection. [Summary of the invention]

[0005] The technical problem to be solved by the present invention is to provide a boiler burner of an oil field heating furnace capable of judging whether a fire tube and a burner flame are normal.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is a boiler burner of an oilfield heating furnace, including a burner, an AI image recognition flame detector and a fire tube leakage detection device, the AI ​​image recognition flame detector includes a casing and a camera device, the camera device includes a camera and a control circuit, the front end of the casing includes a camera hole, the camera device is installed in the casing, and the camera faces the camera hole; the rear part of the burner includes an observation hole, the AI ​​image recognition flame detector is fixed at the burner observation hole, and the camera hole faces the observation hole; the fire tube leakage detection device includes a immersion liquid level transmitter and a bracket, the immersion liquid level transmitter includes a liquid level transmitter body, a liquid level probe and a pressure pipe connecting the transmitter body and the liquid level probe; the burner includes a shell, the liquid level transmitter body is fixed to the outside of the shell by the bracket, the pressure pipe passes through the shell, and the liquid level probe is arranged at the lower part of the shell cavity or in front of the shell cavity.

[0007] The boiler burner described above has an inner shell cavity including a jacket, and the lower part of the annular rear wall of the jacket includes a pressure pipe hole and a plurality of threaded holes; a fixing ring is installed in the pressure pipe hole, and the pressure pipe passes through the inner hole of the fixing ring and enters the jacket of the burner shell; the front plate of the bracket is fixed to the annular rear wall of the jacket by a plurality of screws; the fixing ring is a three-point heat reduction type fixing ring, and the outer periphery of the three-point heat reduction type fixing ring includes three ridges arranged separately along the circumferential direction, and the three ridges of the three-point heat reduction type fixing ring are supported by the pressure pipe hole at three points.

[0008] The boiler burner described above, the bracket includes a bottom plate and an arc-shaped top plate. The bottom plate includes a mounting hole; the immersion liquid level transmitter includes a nut and two insulation pads, the upper end of the liquid level transmitter body includes a threaded shaft head, the threaded shaft head passes through the mounting hole of the bottom plate, and the nut is screwed on the upper end of the threaded shaft head; two insulation pads are sleeved on the threaded shaft head, one is located below the bottom plate, and the other is located above the bottom plate; the aperture of the mounting hole is larger than the diameter of the threaded shaft head, and there is an insulation gap between the threaded shaft head and the mounting hole; the mounting hole of the bottom plate is located at the rear of the bracket; the top plate serves as an insulation plate to cover the pressure pipe outside the burner and the top of the liquid level transmitter body.

[0009] In the boiler burner described above, the outer surface of the bracket facing the burner is sprayed with nano-insulation paint, and the front plate, rear plate and bottom plate of the bracket each include a heat-reducing overhead hole; the pressure pipe led out from the upper end of the liquid level transmitter body is looped out and then enters the shell.

[0010] The boiler burner and AI image recognition flame detector described above include a fan and a camera protection cover, the front end of the casing includes an installation positioning seat, the rear part of the installation positioning seat includes a mounting flange, and the mounting flange includes a plurality of fixing screw holes; the camera hole is located in the installation positioning seat, and the outer periphery of the installation positioning seat includes a plurality of positioning ridges arranged separately; the installation positioning seat is inserted into the observation hole, and the positioning ridges of the installation positioning seat are supported by the observation hole; the mounting flange is connected to the mounting plate of the blower by screws; the outer surface of the casing is sprayed with nano-insulating paint; the fan is installed at the rear of the casing, and the air outlet of the fan faces forward; the rear part of the casing includes an air inlet, and the front part of the casing includes an air outlet, and an air duct is formed between the air outlet of the fan and the air outlet of the casing; the camera is installed at the front of the casing, located in the air duct; the camera protection cover is installed in the camera hole.

[0011] The boiler burner described above, the casing includes two half shells separated from each other on the left and right, and the two half shells are connected by screws; the camera hole is located between the two half shells, and the camera hole includes an annular groove; the camera protection cover is a high-temperature resistant glass sheet, and the high-temperature resistant glass sheet is embedded in the annular groove of the camera hole; the air inlet and air outlet of the casing are located on the side of the first half shell, the air outlet includes an auxiliary air outlet and a main air outlet, the auxiliary air outlet includes a plurality of damping and heat dissipation holes arranged in a matrix, and is arranged on the side of the lower part of the circuit main board; the main air outlet is arranged on the side of the camera of the camera device, and includes a plurality of grid holes.

[0012] In the boiler burner described above, the AI ​​image recognition flame detector includes a bracket, which is fixed on the inner side of the casing; the control circuit includes a circuit main board, which is fixed on the bracket and is orthogonal to the axis of the air duct; the camera is arranged in front of the upper part of the circuit main board.

[0013] The control circuit of the boiler burner described above includes an indicator light and a communication cable connector. The indicator light is fixed on the side of the first half shell, below the main air outlet; the communication cable connector is fixed at the lower end of the rear of the casing, and the communication cable connector is electrically connected to the circuit board.

[0014] The boiler burner described above includes a high-pressure gas fire extinguishing medium injection device, which includes a high-pressure gas fire extinguishing medium injection pipe, a branch pipeline and an electric control valve, and the rear wall of the burner shell includes a high-pressure gas fire extinguishing medium injection hole. The high-pressure gas fire extinguishing medium injection pipe is installed on the high-pressure gas fire extinguishing medium injection hole on the rear wall of the burner shell; the high-pressure gas fire extinguishing medium injection pipe is connected to the electric control valve through a branch pipeline, and the electric control valve is externally connected to a gas fire extinguishing medium generator; the control circuit includes a micro control unit and a memory for storing flame graphic data. The micro control unit includes a start signal input terminal and a flame signal output terminal, a camera is connected to a digital camera interface of the micro control unit, the memory is connected to the micro control unit, the micro control unit is connected to the host computer through a communication bus, and the signal output terminal of the immersion liquid level transmitter and the control terminal of the electric control valve are respectively connected to the host computer.

[0015] The working process of the boiler burner and AI image recognition flame detector described above includes the following steps:

[0016] 1001) After the immersion type liquid level transmitter detects oil leakage from the fire tube, it sends an oil leakage signal to the upper computer;

[0017] 1002) The host computer turns off the power supply and gas of the boiler burner, and the boiler burner is extinguished; the host computer sends a signal to the AI ​​image recognition flame detector, and the AI ​​image recognition flame detector starts and enters the working state;

[0018] 1003) The AI ​​image recognition flame detector starts image recognition, and the camera acquires the video image in real time and sends it to the micro control unit;

[0019] 1004) the microcontroller unit compares the real-time image acquired by the camera with the bounding box and threshold of the stored flame feature training image to determine whether the camera captures the flame image;

[0020] 1005) when the micro control unit determines that the camera captures a flame image, the flame signal output terminal sends a flame detection signal and / or sends a flame detection signal to the upper computer through the communication bus;

[0021] 1006) The host computer starts the external gas fire extinguishing medium generator, and the high-pressure gas fire extinguishing medium sprayed by the gas fire extinguishing medium generator is sprayed from the burner into the oil-leaking fire tube through the high-pressure fire extinguishing gas fire extinguishing medium spraying device.

[0022] The invention can give an alarm in time after the fire tube of the oilfield heating furnace leaks oil, and judge whether there is an abnormal flame, so as to timely extinguish the fire caused by the oil leakage of the fire tube. [Drawings]

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Figure 1 It is a three-dimensional diagram of a boiler burner of an oil field heating furnace according to an embodiment of the present invention.

[0025] Figure 2 It is a front view of a boiler burner of an oil field heating furnace according to an embodiment of the present invention.

[0026] Figure 3 It is a left side view of a boiler burner of an oil field heating furnace according to an embodiment of the present invention.

[0027] Figure 4 yes Figure 3 AA section view in.

[0028] Figure 5 It is a three-dimensional diagram of a liquid leakage detection device according to an embodiment of the present invention.

[0029] Figure 6 1 is an exploded view of a liquid leakage detection device according to an embodiment of the present invention.

[0030] Figure 7 It is a stereoscopic diagram of an AI image recognition flame detector according to an embodiment of the present invention.

[0031] Figure 8 It is a diagram of the internal structure of the AI ​​image recognition flame detector according to an embodiment of the present invention.

[0032] Fig. 9 It is an exploded view of the AI ​​image recognition flame detector according to an embodiment of the present invention.

[0033] Fig.10 It is a circuit block diagram of an AI image recognition flame detector control circuit according to an embodiment of the present invention. [Specific implementation method]

[0034] The structure and principle of the boiler burner of the embodiment of the present invention are as follows: Figures 1 to 10 As shown, it includes a burner, a liquid leakage detection device, a high-pressure gas fire extinguishing medium injection device 80 and an AI image recognition flame detector 100.

[0035] like Figures 1 to 4 The burner shown includes a burner body and an air blower 50. The mounting plate 51 at the front end of the air blower 50 is fixed on the rear plate 41 of the burner housing 40. The mounting plate 51 of the air blower 50 has an observation hole 511. The front end of the AI ​​image recognition flame detector housing is fixed to the mounting plate 51 of the air blower 50 by screws and is located behind the observation hole 511.

[0036] The structure of the AI ​​image recognition flame detector 100 of the embodiment of the present invention is as follows: Figures 7 to 10As shown, it includes a housing 10, a camera device 20, a fan 30 and a high temperature resistant glass sheet 19 (lens protection cover), and the camera device 20 includes a video recognition camera 21 and a control circuit.

[0037] The housing 10 includes a left half housing 10A and a right half housing 10B which are equally divided in the middle. The left half housing 10A and the right half housing 10B are connected by screws 18 .

[0038] The front end of the housing 10 has a camera hole 11, and the fan 30 is installed at the rear of the housing 10 and fixed between the left half housing 10A and the right half housing 10B. The rear of the housing 10 has an air inlet 12, and the air outlet 31 of the fan 30 faces forward. The front of the housing 10 has an air outlet, and an air duct 10C is formed between the air outlet 31 of the fan 30 and the air outlet of the housing 10.

[0039] The camera 21 and the circuit board 22 of the camera device 20 are installed at the front of the housing 10 and located in the air duct 10C. The camera 21 of the camera device 20 faces the camera hole 11, and the high temperature resistant glass sheet 19 is installed in the camera hole 11.

[0040] The front end of the housing 10 is provided with a mounting seat 14, and the rear part of the mounting seat 14 is provided with a mounting flange 15, and the mounting flange 15 is provided with two fixing screw holes 151. The mounting seat 14 is inserted into the observation hole of the mounting plate 51 of the blower, and the outer periphery of the mounting seat 14 has four positioning ridges 141 evenly distributed along the circumferential direction. The positioning ridges 141 of the mounting seat 14 are in contact with the mounting plate 51 and supported by the observation hole of the mounting plate 51. The positioning ridges 141 on the outer periphery of the mounting seat 14 can reduce the contact area with the observation hole, thereby reducing the heat on the mounting plate 51 from being conducted to the inside of the AI ​​image recognition flame detector 100. The outer surface of the housing 10 is sprayed with nano thermal insulation paint to block the heat radiated by the burner.

[0041] The camera hole 11 is located in the mounting and positioning seat 14, between the left half shell 10A and the right half shell 10B, and has a circle of annular groove 111 in the camera hole 11. The high temperature resistant glass sheet 19 is embedded in the annular groove 111 of the camera hole 11.

[0042] The camera device bracket 25 is fixed to the inner side of the right half shell 10B. The circuit board 22 of the camera device 20 is fixed to the bracket 25 and is orthogonal to the axis of the air duct 10C. The camera 21 of the camera device 20 is installed in front of the upper part of the circuit board 22.

[0043] The air inlet 12 and the air outlet of the housing 10 are located on the side of the right half housing 10B.

[0044] The air outlet 13 includes an auxiliary air outlet 13B and a main air outlet 13A. The auxiliary air outlet 13B includes a plurality of damping heat dissipation holes 132 arranged in a matrix. The auxiliary air outlet 13B is arranged on the right side of the lower part of the circuit main board 22. The main air outlet auxiliary air outlet 13A is arranged on the right side of the camera 21 and includes a plurality of grid holes 131.

[0045] The control circuit of the AI ​​image recognition flame detector also includes two working indicator lights 27 and a communication cable connector 28. The working indicator lights 27 are fixed to the side of the right half shell 10B and are located below the main air outlet 13A. The two working indicator lights 27 include a power indicator light and an alarm indicator light. The alarm indicator light is always on when the AI ​​image recognition flame detector is in working state, and turns to flashing display after detecting a flame.

[0046] The communication cable connector 28 is fixed to the lower end of the rear portion of the housing 10 , and the pins of the communication cable connector 28 are connected to the circuit main board 22 via wires.

[0047] like Fig.10 As shown, the control circuit of the AI ​​image recognition flame detector includes a microcontroller unit (MCU), a FLASH memory, an SDRAM memory, and an SD card. The microcontroller unit includes a start signal input terminal and a flame signal output terminal. The video recognition camera 21 (CMOS image camera) is connected to the DMA module of the microcontroller unit through the DCMI communication bus and the DCMI interface of the microcontroller unit, the FLASH memory is connected to the DMA module of the microcontroller unit through the GSPI communication bus, the SDRAM memory is connected to the DMA module of the microcontroller unit through the FMC communication bus and the FMC interface of the microcontroller unit, and the SD card is connected to the DMA module of the microcontroller unit through the SDIO communication bus. The microcontroller unit is connected to the host computer through the 485 communication bus. The start signal input terminal can be connected to the control switch or the host computer; the flame signal output terminal can be connected to a drive device such as a switch tube, an optical coupler, a relay, etc. to drive other electrical equipment, including an alarm indicator light.

[0048] like Figures 1 to 6 As shown, the leakage detection device includes a submersible liquid level transmitter 60 and a bracket 70. The submersible liquid level transmitter 60 includes a liquid level transmitter body 61, a liquid level probe 62, a pressure pipe 63, a mounting nut 64, a heat insulation pad 65 and a heat insulation pad 66. The liquid level probe 62 is connected to the liquid level transmitter body 61 through the pressure pipe 63.

[0049] The inner cavity of the burner housing 40 includes an annular jacket 36. In this embodiment, the lower portion of the annular rear wall 47 of the jacket 46 has a pressure pipe hole 476 and two threaded holes (not shown). The pressure pipe hole 476 is provided with a pressure pipe fixing ring 67.

[0050] The bracket 70 includes a front plate 76, a rear plate 74, a top plate 77 and a bottom plate 73. The bracket 70 is arranged below the burner housing 40, and the front plate 76 of the bracket 70 is fixed to the lower part of the annular rear wall 47 of the jacket 46 by two screws. The outer surface of the bracket 70 facing the burner housing is sprayed with nano heat-insulating paint to block the heat transferred from the heating furnace.

[0051] like Figure 1 As shown, the high-pressure gas fire extinguishing medium injection device 80 includes a high-pressure smoke fire extinguishing medium injection pipe 81, a branch pipeline 82 and an electric control valve 83. A high-pressure gas fire extinguishing medium injection hole is provided on the annular rear wall 47 of the burner housing 40. The high-pressure smoke fire extinguishing medium injection pipe 81 is installed on the high-pressure gas fire extinguishing medium injection hole on the rear wall of the burner housing. The high-pressure smoke fire extinguishing medium injection pipe 81 is connected to the electric control valve 83 through the branch pipeline 82. The electric control valve 83 is externally connected to the smoke generator through the main pipeline 84. The control end of the electric control valve 83 is connected to the host computer.

[0052] like Figure 6 As shown, the front plate 76 of the bracket 70 , the rear plate 74 of the bracket and the bottom plate 73 of the bracket each include a heat reduction overhead hole, which can reduce the heat conducted from the burner to the liquid level transmitter 60 .

[0053] The bottom plate 73 of the bracket 70 has a mounting hole 736, and the mounting hole 736 of the bottom plate 73 is located at the rear of the bracket 70. The upper end of the liquid level transmitter body 61 has a threaded shaft head 611, and the threaded shaft head 611 passes through the mounting hole 736 of the bottom plate 73, and the mounting nut 64 is screwed on the upper end of the threaded shaft head 611. The thermal insulation pad 65 and the thermal insulation pad 66 are sleeved on the threaded shaft head 611, and the thermal insulation pad 66 is located below the bottom plate 73, and the thermal insulation pad 65 is located above the bottom plate 73. The signal line output connector 68 of the liquid level transmitter 60 is located at the lower end of the liquid level transmitter body 66. The diameter of the mounting hole 736 is larger than the diameter of the threaded shaft head 611. After the mounting nut 64 is tightened, there is a thermal insulation gap between the threaded shaft head 611 of the liquid level transmitter body 66 and the mounting hole 736.

[0054] After the pressure pipe 63 led out from the upper end of the liquid level transmitter body 61 surrounds a flat and long ring 63A with its long axis in the horizontal direction, the pressure pipe 63 passes through the pressure pipe fixing ring 67 and then enters the jacket 46 of the burner shell 40. The liquid level probe 67 is arranged at the front end of the jacket 46.

[0055] The pressure pipe fixing ring 67 is a three-point heat reduction fixing ring, and three ridges are arranged circumferentially on the outer circumference of the three-point heat reduction fixing ring. The three ridges of the three-point heat reduction fixing ring are supported at three points by the pressure pipe holes 476 to reduce heat transfer from the burner shell 40 to the pressure pipe 63.

[0056] The arc-shaped top plate 77 serves as a heat insulation plate to cover the flat and long ring ring 63A of the pressure pipe outside the burner and the top of the liquid level transmitter body 66 to reduce the influence of the heat radiation of the burner housing 40 on the liquid level transmitter.

[0057] Because the temperature on the burner shell is relatively high, the heat will be transferred to the bracket and then transmitted to the liquid level transmitter through the bracket, which is not conducive to the normal operation of the liquid level transmitter. In the above embodiments of the present invention, the distance from the liquid level probe to the liquid level transmitter body is lengthened by a flat long ring, and two insulation gaskets are used to separate the connection between the bracket and the liquid level transmitter body, so that the temperature of the liquid level transmitter body will not be affected by the heat radiation of the burner shell.

[0058] The distance from the level probe to the level transmitter body can also be lengthened by using multiple spiral rings in the shape of a spiral spring.

[0059] The burner of the above embodiment of the present invention is equipped with a liquid leakage detection device. The liquid level probe of the liquid leakage detection device can detect whether there is liquid in the lower part of the fire tube. If no liquid is sensed, it is in a normal working state. After the liquid level probe senses that there is liquid in the lower part of the fire tube, the liquid level transmitter body transmits a signal to the upper computer through the line, and performs a fire extinguishing operation on the fire tube, so as to quickly extinguish the fire in the fire tube.

[0060] like Fig.10 As shown, the working mode of the AI ​​image recognition flame detector camera device of the embodiment of the present invention can be switched to the working mode in two ways: the host computer switches the working mode of the AI ​​image recognition flame detector camera device by issuing a working instruction or inputting a start level through the start signal input terminal. The AI ​​image recognition flame detector is usually in an idle state, and when it receives an input start signal, it switches to a working state to start recognition work, or, in an idle state, it switches to a normal state to start recognition work by receiving a host computer instruction received through 485 communication.

[0061] In the working state, the AI ​​image recognition flame detector starts the image recognition work, and the CMOS image camera acquires the video image in real time. The microcontroller obtains the image data through the DCMI (Digital camera interface) digital camera interface, and transfers the image data to the RAM (32-BIT SDRAM) through the DMA module (Direct Memory Access) of the microcontroller. The microcontroller can acquire the image data at high speed and use the real-time image data as the training image. The microcontroller uses the algorithm to determine the bounding box and threshold of the flame feature in advance for a variety of existing flame feature training images as reference data. The neural network is determined by the bounding box and threshold of the training images acquired by the CMOS image camera and the training images of various flame features.

[0062] The microcontroller unit compares the real-time image acquired by the CMOS image camera with the bounding boxes and thresholds of the stored multiple flame feature training images to determine whether the CMOS image camera captures the flame image.

[0063] FLASH and SD cards are used to save images acquired by the CMOS image camera in real time at a certain moment. The bounding box and threshold of the image can be used as a reference later to optimize the accuracy and reliability of image recognition.

[0064] When the microcontroller unit determines that the CMOS image camera captures a flame image, the GPIO interface generates a logic level flip in real time, or transmits a communication instruction through 485 communication to inform the host computer to perform the corresponding action.

[0065] The working process of the leakage detection device of the boiler burner of the oil field heating furnace and the AI ​​image recognition flame detector in cooperation with the host computer in the embodiment of the present invention is as follows:

[0066] 1) The immersion level transmitter is in real-time monitoring state. When oil leakage from the fire tube is detected, an oil leakage signal is sent to the upper computer;

[0067] 2) After receiving the oil leakage signal, the host computer first turns off the power and gas of the boiler burner to extinguish the boiler burner; then the host computer sends a signal to the AI ​​image recognition flame detector, which starts and enters the working state;

[0068] 3) The AI ​​image recognition flame detector starts image recognition, the camera acquires the video image in real time and sends it to the AI ​​image recognition flame detector microcontroller unit;

[0069] 4) The AI ​​image recognition flame detector microcontroller unit compares the real-time image acquired by the camera with the bounding box and threshold of the stored flame feature training image to determine whether the camera has captured the flame image;

[0070] 5) When the microcontroller unit determines that the camera has captured a flame image, the flame signal output terminal sends a flame detection signal and sends a flame detection signal to the upper computer through the communication bus;

[0071] 6) The host computer starts the external smoke generator. The high-pressure smoke gas ejected by the smoke generator is sprayed from the burner into the leaking fire tube through the high-pressure gas fire extinguishing medium injection device. At the same time, the alarm indicator light of the AI ​​image recognition flame detector flashes to alarm.

Claims

1. A boiler burner for an oilfield heating furnace, comprising a burner and a flame identification detector, characterized in that: The invention comprises a fire tube leakage detection device, wherein the flame recognition detector is an AI image recognition flame detector, the AI ​​image recognition flame detector comprises a casing and a camera device, the camera device comprises a camera head and a control circuit, the front end of the casing comprises a camera hole, the camera device is installed in the casing, and the camera head faces the camera hole; the rear part of the burner comprises an observation hole, the AI ​​image recognition flame detector is fixed at the observation hole of the burner, and the camera hole faces the observation hole; the fire tube leakage detection device comprises a immersion type liquid level transmitter and a bracket, the immersion type liquid level transmitter comprises a liquid level transmitter body, a liquid level probe and a pressure pipe connecting the transmitter body and the liquid level probe; the burner comprises a casing, the liquid level transmitter body is fixed to the outside of the casing by a bracket, the pressure pipe passes through the casing, and the liquid level probe The head is arranged at the lower part of the inner cavity of the shell or in front of the inner cavity of the shell; the control circuit includes a microcontroller unit, which is connected to the upper computer through a communication bus, and the signal output end of the immersion type liquid level transmitter is connected to the upper computer; the inner cavity of the shell includes a jacket, and the lower part of the annular rear wall of the jacket includes a pressure pipe hole and a plurality of threaded holes; a fixing ring is installed in the pressure pipe hole, and the pressure pipe passes through the inner hole of the fixing ring and enters the jacket of the burner shell; the front plate of the bracket is fixed to the annular rear wall of the jacket by a plurality of screws; the fixing ring is a three-point heat reduction type fixing ring, and the outer periphery of the three-point heat reduction type fixing ring includes three ridges arranged separately along the circumferential direction, and the three ridges of the three-point heat reduction type fixing ring are supported by three points of the pressure pipe hole; the bracket includes a bottom plate and an arc-shaped top plate, and the bottom plate includes a mounting hole; the immersion The liquid level transmitter includes a nut and two thermal insulation pads. The upper end of the liquid level transmitter body includes a threaded shaft head, the threaded shaft head passes through the mounting hole of the base plate, and the nut is screwed on the upper end of the threaded shaft head; two thermal insulation pads are sleeved on the threaded shaft heads, one is located below the base plate, and the other is located above the base plate; the aperture of the mounting hole is larger than the diameter of the threaded shaft head, and there is a thermal insulation gap between the threaded shaft head and the mounting hole; the mounting hole of the base plate is located at the rear of the bracket; the top plate serves as an insulation plate to cover the pressure pipe outside the burner and the top of the liquid level transmitter body; the outer surface of the bracket facing the burner is sprayed with nano-thermal insulation paint, and the front plate of the bracket, the rear plate of the bracket and the bottom plate of the bracket each include a heat-reducing overhead hole; the pressure pipe led out from the upper end of the liquid level transmitter body is wrapped around a ring and then enters the shell; AI image The flame detector includes a fan and a camera protection cover, the front end of the housing includes a mounting seat, the rear part of the mounting seat includes a mounting flange, and the mounting flange includes a plurality of fixing screw holes; the camera hole is located in the mounting seat, and the periphery of the mounting seat includes a plurality of positioning ridges arranged separately; the mounting seat is inserted into the observation hole, and the positioning ridges of the mounting seat are supported by the observation hole; the mounting flange is connected to the mounting plate of the blower by screws; the outer surface of the housing is sprayed with nano thermal insulation paint, the fan is installed at the rear part of the housing, and the air outlet of the fan faces forward; the rear part of the housing includes an air inlet, and the front part of the housing includes an air outlet, and an air duct is formed between the air outlet of the fan and the air outlet of the housing; the camera is installed at the front part of the housing and is located in the air duct; The camera protection cover is installed in the camera hole; the working process of the AI ​​image recognition flame detector participating in the fire extinguishing of oil leakage in the fire tube includes the following steps: 101) After the immersion level transmitter detects oil leakage from the fire tube, it sends an oil leakage signal to the upper computer; 102) The host computer turns off the power supply and gas of the boiler burner, and the boiler burner goes out; the host computer sends a signal to the AI ​​image recognition flame detector, and the AI ​​image recognition flame detector starts and enters the working state; 103) The AI ​​image recognition flame detector starts image recognition, and the camera acquires video images in real time and sends them to the micro control unit.

2. The boiler burner according to claim 1, characterized in that: The casing includes two half shells separated from each other on the left and right, and the two half shells are connected by screws; the camera hole is located between the two half shells, and the camera hole includes an annular groove; the camera protection cover is a high-temperature resistant glass sheet, and the high-temperature resistant glass sheet is embedded in the annular groove of the camera hole; the air inlet and air outlet of the casing are located on the side of the first half shell, and the air outlet includes an auxiliary air outlet and a main air outlet, and the auxiliary air outlet includes a plurality of damping heat dissipation holes arranged in a matrix, which are arranged on the side of the lower part of the circuit main board; the main air outlet is arranged on the side of the camera of the camera device, and includes a plurality of grid holes.

3. The boiler burner according to claim 2, characterized in that: The AI ​​image recognition flame detector includes a bracket, which is fixed on the inner side of the casing; the control circuit includes a circuit main board, which is fixed on the bracket and is orthogonal to the axis of the air duct; the camera is arranged in front of the upper part of the circuit main board.

4. The boiler burner according to claim 2, characterized in that: The control circuit includes an indicator light and a communication cable connector. The indicator light is fixed on the side of the first half shell and is located below the main air outlet. The communication cable connector is fixed at the lower end of the rear of the shell and is electrically connected to the circuit main board.

5. The boiler burner according to claim 1, characterized in that: It includes a high-pressure gas fire extinguishing medium injection device, which includes a high-pressure gas fire extinguishing medium injection pipe, a branch pipeline and an electric control valve, and the rear wall of the burner shell includes a high-pressure gas fire extinguishing medium injection hole. The high-pressure gas fire extinguishing medium injection pipe is installed on the high-pressure gas fire extinguishing medium injection hole on the rear wall of the burner shell; the high-pressure gas fire extinguishing medium injection pipe is connected to the electric control valve through a branch pipeline, and the electric control valve is externally connected to a gas fire extinguishing medium generator; the control circuit includes a memory for storing flame graphic data, the micro control unit includes a start signal input terminal and a flame signal output terminal, the camera is connected to the digital camera interface of the micro control unit, the memory is connected to the micro control unit, and the control end of the electric control valve is connected to the host computer.

6. The boiler burner according to claim 5, characterized in that: The working process of extinguishing oil leaking fire with a fire extinguisher includes the following steps: 601) The microcontroller unit compares the real-time image acquired by the camera with the bounding box and threshold of the stored flame feature training image to determine whether the camera captures the flame image; 602) When the microcontroller unit determines that the camera captures a flame image, the flame signal output terminal sends a flame detection signal and / or sends a flame detection signal to the upper computer through the communication bus; 603) The host computer starts the external gas fire extinguishing medium generator, and the high-pressure gas fire extinguishing medium sprayed by the gas fire extinguishing medium generator is sprayed from the burner into the oil-leaking fire tube through the high-pressure gas fire extinguishing medium spraying device.

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