Furnace chamber temperature monitoring device of heating furnace for recycling waste mineral oil

Abstract

The invention relates to the technical field of temperature monitoring, in particular to a hearth temperature monitoring device of a heating furnace for waste mineral oil recycling, which comprises a furnace body and a chimney, a burner and a furnace tube are arranged in the furnace body, and the burner is used for heating waste mineral oil in the furnace tube; a movable detection mechanism for monitoring the temperature of the furnace tube is arranged in the furnace body; the movable detection mechanism comprises a movable detection frame arranged outside the furnace tube, the movable detection frame is installed in the hearth through a lifting screw and a guide rod, one end of the lifting screw is fixedly connected with a lifting motor installed outside the furnace body, and the lifting motor is used for driving the movable detection frame to move up and down along the lifting screw and the guide rod. The device has the characteristics of omnibearing and accurate temperature detection, oil product coking prevention and furnace tube damage prevention, and solves the problems that an existing hearth temperature monitoring device is only provided with sensors at several points, the temperature distribution condition of the whole hearth cannot be comprehensively mastered, some local overheated or overcooled areas can be omitted, and coking is caused.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature monitoring, in particular to a furnace temperature monitoring device for a heating furnace for recycling waste mineral oil. Background Art

[0002] The coking problem in heating furnaces used for waste mineral oil recovery is a relatively common problem that affects the operating efficiency and safety of the equipment. Waste mineral oil has a complex composition, containing various hydrocarbons, gums, asphaltenes, etc. Among them, gums and asphaltenes easily undergo condensation reactions at high temperatures to form large molecular coke precursors. If the content of these components in the waste mineral oil is high, the tendency to coke will increase. When recycling waste mineral oil, the heating furnace needs to heat the oil to a certain temperature to achieve processes such as evaporation and separation. When the heating temperature is too high and exceeds the cracking temperature of the oil, the oil will undergo a cracking reaction, producing small molecular gases and coke. In addition, local overheating can easily cause the oil to quickly coke on the surface of the heating furnace tube.

[0003] Existing furnace temperature monitoring devices typically install temperature sensors such as thermocouples or thermistors at several points within the furnace. The temperature field within a heating furnace is not uniformly distributed, and large temperature differences may exist between different areas. Installing sensors at only a few points fails to fully capture the temperature distribution of the entire furnace, and may miss areas of localized overheating or undercooling. Localized overheating can lead to problems such as oil coking and furnace tube damage, while undercooling can affect the efficiency and quality of waste mineral oil recovery. Therefore, we propose a furnace temperature monitoring device for a heating furnace used for waste mineral oil recovery. Summary of the Invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a furnace temperature monitoring device for a heating furnace for waste mineral oil recovery, which has the characteristics of comprehensive and accurate temperature detection, avoiding oil coking and furnace tube damage. It solves the problem that the existing furnace temperature monitoring device only installs sensors at a few points, cannot fully grasp the temperature distribution of the entire furnace, and will miss some local overheating or overcooling areas, resulting in coking.

[0005] The present invention provides the following technical solution: a furnace temperature monitoring device for a heating furnace for waste mineral oil recovery, comprising a furnace body and a chimney, wherein a burner and a furnace tube are arranged inside the furnace body, wherein the burner is used to heat the waste mineral oil in the furnace tube; and an active detection mechanism for monitoring the temperature of the furnace tube is arranged inside the furnace body.

[0006] The movable detection mechanism includes a movable detection frame arranged outside the furnace tube, and the movable detection frame is installed in the furnace through a lifting screw and a guide rod. One end of the lifting screw is fixedly connected to a lifting motor installed outside the furnace body, and the lifting motor is used to drive the movable detection frame to move up and down along the lifting screw and the guide rod.

[0007] The other end of the lifting screw is rotatably connected to the furnace body, and a temperature sensor is provided on the movable detection frame.

[0008] Preferably, a through hole is opened on the movable detection frame at a position corresponding to the guide rod, and a limiting ring is fixedly connected to a position corresponding to the lifting screw on the movable detection frame, and a first thread is provided inside the limiting ring, and the first thread matches the second thread on the lifting screw.

[0009] Preferably, a plurality of temperature sensors are evenly distributed on the movable detection frame, and the probes of the temperature sensors are aligned with the furnace tube.

[0010] Preferably, a displacement sensor is installed inside the furnace body, a probe of the displacement sensor is connected to the movable detection frame, and the displacement sensor is used to detect the lifting position of the movable detection frame.

[0011] Preferably, it further comprises an internal detection mechanism, which detects the internal temperature of the furnace tube through an infrared temperature sensor.

[0012] Preferably, the internal detection mechanism includes a detection box, in which an infrared temperature sensor and a rotatable reflector are installed. The reflector is installed on the rotating shaft of the second rotating motor. The light from the infrared temperature sensor is reflected to the furnace tube through the reflector. The second rotating motor is used to drive the reflector to rotate, thereby detecting the temperature at different positions in the vertical direction of the furnace tube.

[0013] Preferably, a rotating motor 1 is installed inside the detection box, the output shaft of the rotating motor 1 is connected to the rotating motor 2, and the rotating shaft of the rotating motor 1 is perpendicular to the rotating shaft of the rotating motor 2.

[0014] The infrared temperature sensor is fixed to the rotating shaft through a bracket, and the rotating motor 1 drives the rotating motor 2, the reflector and the infrared temperature sensor to rotate synchronously through the rotating shaft, thereby detecting the temperature at different positions in the horizontal direction of the furnace tube.

[0015] Preferably, an infrared distance sensor is integrated on the infrared temperature sensor, and a probe of the infrared distance sensor is aligned with the reflector.

[0016] Preferably, angle sensors are installed on the rotating shafts of the first rotating motor and the second rotating motor.

[0017] Preferably, a control box is installed outside the furnace body, and the control box is used to receive data from various sensors and control the operation of various motors.

[0018] The present invention provides a furnace temperature monitoring device for a heating furnace used for recycling waste mineral oil. The furnace tube is the component in the heating furnace that directly contacts the waste mineral oil and conducts heat transfer. Coking often occurs first on the surface of the furnace tube. By providing a movable detection mechanism, the temperature of the furnace tube can be detected sequentially from top to bottom, and the device can perform up and down reciprocating motion. A number of sensors are evenly distributed on the movable detection frame, or the sensors are arranged in a ring, thereby achieving all-round detection of the furnace tube in the furnace, ensuring that the burner provides a uniform temperature for the furnace tube and the waste mineral oil, reducing and avoiding the generation of coking. This solves the problem that existing furnace temperature monitoring devices only install sensors at a few points, cannot fully grasp the temperature distribution of the entire furnace, and may miss some locally overheated or overcooled areas, leading to coking. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 Schematic diagram of the activity detection mechanism of the present invention.

[0021] Figure 3 It is a schematic diagram of the thread lifting structure of the present invention.

[0022] Figure 4 Schematic diagram of the internal detection mechanism of the present invention Figure 1 .

[0023] Figure 5 Schematic diagram of the internal detection mechanism of the present invention Figure 2 .

[0024] Figure 6 Schematic diagram of the internal detection mechanism of the present invention Figure 3 .

[0025] In the figure: 1. furnace body; 2. chimney; 3. burner; 4. furnace tube; 5. movable detection frame; 51. limit ring; 52. first thread; 6. temperature sensor; 7. lifting screw; 71. second thread; 8. guide rod; 9. lifting motor; 10. displacement sensor; 11. internal detection mechanism; 1101. detection box; 1102. rotating motor 1; 1103. rotating shaft; 1104. rotating motor 2; 1105. reflector; 1106. bracket; 1107. infrared temperature sensor; 1108. infrared distance sensor; 1109. angle sensor; 12. control box; 13. support leg. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, the present invention provides a technical solution: a furnace temperature monitoring device for a heating furnace for waste mineral oil recovery, comprising a furnace body 1 and a chimney 2. A burner 3 and a furnace tube 4 are provided inside the furnace body 1. The burner 3 is used to heat the waste mineral oil in the furnace tube 4. A movable detection mechanism is provided inside the furnace body 1 for monitoring the temperature of the furnace tube 4. The waste mineral oil is input from the bottom of the furnace tube 4 and output from the top. The heat in the furnace is transferred to the waste mineral oil through the furnace tube 4.

[0028] like Figure 2 As shown, the movable detection mechanism includes a movable detection frame 5 arranged outside the furnace tube 4, and the movable detection frame 5 is installed in the furnace through a lifting screw 7 and a guide rod 8. One end of the lifting screw 7 is fixedly connected to a lifting motor 9 installed outside the furnace body 1. The lifting motor 9 is used to drive the movable detection frame 5 to move up and down along the lifting screw 7 and the guide rod 8; One end of the lifting screw 7 is rotatably connected to the furnace body 1 , and the other end is fixed to the output shaft of the lifting motor 9 . The lifting screw 7 is driven to rotate by the lifting motor 9 , and a temperature sensor 6 is provided on the movable detection frame 5 .

[0029] like Figure 3 As shown, a through hole is formed on the movable detection frame 5 at a position corresponding to the guide rod 8. A limit ring 51 is fixedly connected to the position corresponding to the lifting screw 7 on the movable detection frame 5. A first thread 52 is provided inside the limit ring 51, and the first thread 52 matches the second thread 71 on the lifting screw 7. The rotating lifting screw 7 drives the second thread 71 to rotate, causing the limit ring 51 with the first thread 52 to rise and fall along the lifting screw 7, thereby driving the movable detection frame 5 as a whole to rise and fall along the lifting screw 7. The through hole of the movable detection frame 5 then rises and falls along the guide rod 8. The guide rod 8 plays a guiding and supporting role, so that the movable detection frame 5 remains horizontal during the lifting process.

[0030] Several (at least three) temperature sensors 6 are evenly distributed on the movable detection frame 5, with their probes aligned with the furnace tubes 4. The temperature sensors 6 are evenly spaced or arranged in a ring, enabling all-around detection of the furnace tubes 4 within the furnace. The temperature sensors 6 are thermocouples or thermal resistors, for example.

[0031] A displacement sensor 10 is installed inside the furnace body 1. The probe of the displacement sensor 10 is connected to the movable detection frame 5. The displacement sensor 10 is used to detect the lifting position of the movable detection frame 5. A linear displacement sensor is a device used to measure the linear displacement of an object. Common types include resistive, inductive, capacitive and grating types. The resistive linear displacement sensor consists of a resistor element and a movable brush. The resistor element is a resistance wire or conductive plastic film with a uniform resistance distribution. The movable brush is connected to the movable detection frame 5. When the height of the movable detection frame 5 and the temperature sensor 6 changes, the brush will move accordingly on the resistor element. Since the resistance value of the resistor element is proportional to the length, the movement of the brush will change the resistance value between the brush and the two ends of the resistor element. By measuring this change in resistance value, the height change of the temperature sensor 6 can be converted.

[0032] The resistive linear displacement sensor can achieve high measurement accuracy, generally reaching the millimeter or even sub-millimeter level, and can accurately measure small changes in the height of the temperature sensor 6, thereby providing reliable data support for accurately controlling the position of the temperature sensor 6 in the furnace, and helping to more accurately monitor the temperature distribution at different heights in the furnace. The displacement sensor 10 can quickly respond to changes in the height of the temperature sensor 6 and promptly convert the height change information into an electrical signal output. This is very important for real-time monitoring of the furnace temperature of the heating furnace. When the position of the temperature sensor 6 needs to be quickly adjusted according to the temperature distribution in the furnace, the linear displacement sensor can quickly feedback the height information, allowing the control system to respond in a timely manner, thereby improving the real-time and effectiveness of temperature monitoring.

[0033] The system also includes an internal detection mechanism 11, which detects the internal temperature of the furnace tube 4 via an infrared temperature sensor 1107. The infrared temperature sensor 1107 is primarily composed of an optical system, a detector, and a signal processing circuit. Any object above absolute zero will emit infrared radiation, and the radiation energy is related to the object's temperature and emissivity. The optical system is responsible for collecting the infrared radiation emitted by the furnace tube 4 and focusing it onto the detector. The detector converts the received infrared radiation energy into an electrical signal, the magnitude of which is proportional to the intensity of the incident infrared radiation. The signal processing circuit amplifies, filters, and linearizes the electrical signal output by the detector, ultimately converting it into a corresponding temperature value and displaying it. By measuring the infrared radiation emitted from the surface of the furnace tube 4, the infrared temperature sensor 1107 can obtain temperature information of the furnace tube 4 in a non-contact manner.

[0034] Infrared temperature sensor 1107 rapidly responds to changes in furnace tube 4 temperature, typically measuring and outputting temperature data within a short timeframe (typically milliseconds). Combined with the scanning function of reflector 1105, infrared temperature sensor 1107 can generate temperature images across the entire surface of furnace tube 4, visually displaying the temperature distribution within the tube 4. Heating furnaces are subject to harsh conditions such as high temperatures, dust, and smoke. Infrared temperature sensor 1107 exhibits excellent environmental adaptability. Unaffected by dust and smoke, it can accurately measure furnace tube 4 temperature even in environments laden with impurities. Furthermore, infrared temperature sensor 1107 typically has a high degree of protection, offering resistance to high temperatures and corrosive gases, ensuring long-term stable operation in harsh environments.

[0035] The internal detection mechanism 11 includes a detection box 1101, which houses an infrared temperature sensor 1107 and a rotatable reflector 1105. Mirror 1105 is mounted on the rotating shaft of a second rotating motor 1104. Light from the infrared temperature sensor 1107 is reflected by the reflector 1105 onto the furnace tube 4. The second rotating motor 1104 is used to rotate the reflector 1105, thereby detecting the temperature at different vertical locations on the furnace tube 4. The rotation of the reflector 1105 directs the infrared temperature sensor 1107's detection angle to different locations on the furnace tube 4, enabling all-around, multi-angle temperature detection of the furnace tube 4. This overcomes the limitation of the fixed infrared temperature sensor 1107, which can only detect specific areas, and allows for a comprehensive understanding of the temperature distribution of the furnace tube 4. A dust cover (not shown) is provided at the bottom of the detection box 1101. This sealed dust cover prevents dust from entering the space where the reflector 1105 is located. The dust cover should be made of a material that is resistant to high temperatures and has good light transmittance, such as quartz glass, to ensure that infrared light can pass through smoothly and prevent dust from adhering to the surface of the reflector 1105.

[0036] The detection box 1101 is internally installed with a rotating motor 1102, the output shaft of the rotating motor 1102 is connected to the rotating motor 2 1104, and the rotating shaft 1103 of the rotating motor 1102 is perpendicular to the rotating shaft of the rotating motor 2 1104; Figure 4 As shown, it is a state diagram of the reflector 1105 rotating to the right and detecting the bottom of the furnace tube 4; Figure 5 This is a state diagram of the reflector 1105 rotating to the right and detecting the top of the furnace tube 4; Figure 6 This is a state diagram of the reflector 1105 rotating to the left and detecting the top of the furnace tube 4. The up and down flipping angle of the reflector 1105 is adjusted according to the height of the furnace tube 4. The horizontal rotation angle of the reflector 1105 is 0-360 degrees, and the inside of the furnace tube 4 is fully detected.

[0037] Infrared temperature sensor 1107 is secured to rotating shaft 1103 via bracket 1106. Rotating motor 1102, via rotating shaft 1103, drives rotating motor 2 1104, reflector 1105, and infrared temperature sensor 1107 in synchronous rotation, thereby detecting the temperature at various horizontal locations on furnace tube 4. By driving reflector 1105 vertically with a single motor, detailed scanning of various vertical locations on furnace tube 4 is possible. Accurately capturing temperature information at every point from top to bottom of furnace tube 4 helps identify potential temperature gradient variations, localized overheating, or overcooling along the height of furnace tube 4, providing detailed vertical data for a comprehensive understanding of the temperature distribution on furnace tube 4.

[0038] Another motor drives the reflector 1105 and infrared temperature sensor 1107 to rotate horizontally, allowing the infrared temperature sensor 1107 to detect the temperature at different locations horizontally within the furnace tube 4. This helps identify temperature differences along the circumference of the furnace tube 4, such as differences between the side of the furnace tube 4 closer to the heat source and the side farther away from the heat source, or horizontal temperature variations caused by uneven material flow, thereby more accurately assessing the operating status of the furnace tube 4.

[0039] Compared to installing multiple fixed infrared temperature sensors 1107 to cover different locations on furnace tube 4, using infrared temperature sensors 1107 in conjunction with reflectors 1105 reduces the number of thermometers used, thereby lowering equipment procurement costs. Furthermore, since the number of sensors is reduced, the installation, wiring, and maintenance workload is also reduced, further reducing the overall cost and maintenance difficulty of the system.

[0040] Infrared temperature sensor 1107 is integrated with infrared distance sensor 1108, and the probe of infrared distance sensor 1108 is aligned with reflector 1105. Infrared distance sensor 1108 can accurately measure the distance between infrared temperature sensor 1107 and the detected position, thereby accurately knowing the specific position of furnace tube 4 corresponding to the measured temperature. This helps to draw a more detailed temperature distribution map of furnace tube 4, which is very beneficial for analyzing temperature changes in different parts of furnace tube 4.

[0041] Angle sensors 1109 are mounted on the rotating shafts 1103 of rotating motor 1102 and 1104 of rotating motor 2. These sensors provide highly precise angle measurements, accurately determining the rotation angle of reflector 1105 and, in turn, precisely determining the position of furnace tube 4 at which infrared temperature sensor 1107 is pointing. This facilitates high-precision spatial detection of the temperature of furnace tube 4, enabling the resolution of temperature variations in even the smallest areas of furnace tube 4 and providing reliable data support for precise control of furnace operation.

[0042] When the heating furnace is operating normally, the temperature distribution in the furnace is relatively uniform, and the temperature at each point fluctuates within a certain range. When coking occurs on the surface of the furnace tube 4 or certain parts in the furnace, the coking layer will affect the heat transfer, causing the temperature distribution of the coked parts to change. Generally speaking, coking will hinder heat transfer, causing the temperature of the coked parts to rise abnormally, and the gradient of the temperature change will also be different from normal. The furnace tube 4 is the component in the heating furnace that directly contacts the waste mineral oil and transfers heat, and coking often occurs first on the surface of the furnace tube 4. When coking occurs on the surface of the furnace tube 4, since the thermal conductivity of the coke layer is much lower than that of the metal tube wall, the temperature of the outer wall of the furnace tube 4 will increase, while the temperature of the fluid in the tube changes relatively little, thereby increasing the temperature difference between the inside and outside of the tube wall.

[0043] The position detected by the infrared temperature sensor 1107 can be determined by the angle sensor 1109 and the infrared distance sensor 1108, and then the infrared temperature sensor 1107 can be used to detect whether there is a temperature abnormality at that position. When the temperature difference is too large and the temperature is high, it indicates that there is coking at that position of the furnace tube 4.

[0044] A control box 12 is mounted on the outside of the furnace body 1. This box receives data from various sensors and controls the operation of various motors. Legs 13 are provided on the furnace body 1 to support it. Sensors convert detected physical quantities (such as temperature and angle) into electrical signals, which are then transmitted to the control box 12 via signal lines. An analog-to-digital conversion module within the control box 12 converts the analog signals into digital signals for processing and analysis by a microprocessor. The microprocessor interprets, stores, and displays the sensor data according to pre-set programs and algorithms, allowing operators to intuitively understand the furnace temperature and the status of related components.

[0045] The microprocessor in the control box 12 generates corresponding control signals according to the preset control strategy and the received sensor data. These control signals are amplified and converted by the driving circuit to control the operation of the motor. When it is necessary to adjust the angle of the reflector 1105 to realize temperature detection at different positions, the control box 12 sends a control signal to the rotating motor to accurately control the rotation angle of the motor, thereby driving the reflector 1105 to rotate to the appropriate position. For the up and down moving motor of the movable detection frame 5, the control box 12 also sends a control signal according to the demand of temperature detection to realize the forward and reverse rotation and speed control of the motor, thereby driving the movable detection frame 5 to move up and down outside the furnace tube 4 to realize all-round temperature measurement.

[0046] As the core hub of the entire system, the control box 12 centrally processes and analyzes data from various sensors, while also providing unified control over each motor. This ensures coordinated operation of the furnace temperature monitoring system, improving system stability and reliability. Precise control of the motor by the control box 12 allows for precise adjustment of the angle of the reflector 1105 and the position of the movable detection frame 5. This helps improve the accuracy and comprehensiveness of temperature detection, ensuring accurate acquisition of temperature information at different locations on the furnace tube 4.

[0047] In the present invention, infrared temperature sensors 1107 and reflective mirrors 1105 are used to scan and measure the inside of the furnace tube 4. Temperature sensors are mounted on a movable detection frame 5 that can move vertically, enabling all-around temperature measurement of the outside of the furnace tube 4. Internal temperature measurement captures the temperature of the portion of the furnace tube 4 that comes into direct contact with the medium, while external temperature measurement monitors the temperature of the entire outer surface of the furnace tube 4. Combining these two methods allows for comprehensive temperature measurement of the furnace tube 4 from the inside to the outside, avoiding blind spots. The internal and external temperature data can be mutually verified. By comparing and analyzing the temperature differences and trends inside and outside, the operating status of the furnace tube 4 can be more accurately determined, improving the reliability and accuracy of temperature measurement. When problems such as localized overheating or leakage occur in the furnace tube 4, the temperature distribution inside and outside can be combined to more precisely locate the fault. If the temperature of a certain area inside the furnace tube rises abnormally and the temperature of the corresponding area outside the furnace tube also changes significantly, it can be preliminarily determined that a problem exists at that location. Both internal scanning temperature measurement and external movement of the movable detection frame 5 allow for real-time and dynamic monitoring of temperature changes in the furnace tube 4. It can promptly detect instantaneous temperature fluctuations and abnormal increases or decreases, and provide operators with timely and accurate temperature information so that they can adjust process parameters in a timely manner.

[0048] Due to the large thermal resistance of the coking area, the temperature distribution inside and outside the furnace tube 4 will be different from that of the normal area. The temperature measurement on the inside can find that the temperature of the coking area is relatively low, because the coking hinders the heat transfer from the medium in the tube to the inner wall of the furnace tube 4; the temperature measurement on the outside may find that the outer surface temperature of the corresponding coking area is also lower than other parts. By comparing the temperature difference between the inside and outside, the coking area can be identified more accurately. There is a temperature gradient change between the coking area and the non-coking area. Combining the temperature change curve obtained by the inside scanning temperature measurement and the temperature field distribution obtained by the temperature measurement of the outside movable detection frame 5, the change of the temperature gradient can be analyzed, so as to more clearly outline the boundary and range of the coking area. When the surface of the furnace tube 4 is coked, the thermal conductivity of the coke layer is low, resulting in an abnormal increase in the tube wall temperature detected by the outside temperature sensor 6, while the temperature inside the tube detected by the inside infrared temperature sensor 1107 is relatively lagging. By comparing the internal and external temperature difference thresholds through the control box 12, a coking warning can be triggered.

[0049] Since the two can work together to monitor the temperature of the furnace tube 4 in real time and comprehensively, abnormal temperature changes can be detected in the early stage of coking, and an early warning can be issued to avoid further deterioration of coking, reduce damage to the furnace tube 4 and production accidents caused by coking, and extend the service life of the furnace tube 4.

[0050] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A furnace temperature monitoring device for a heating furnace for waste mineral oil recovery, comprising a furnace body (1) and a chimney (2), characterized in that: A burner (3) and a furnace tube (4) are provided inside the furnace body (1); the burner (3) is used to heat the waste mineral oil in the furnace tube (4); and a movable detection mechanism is provided inside the furnace body (1) for monitoring the temperature of the furnace tube (4); The movable detection mechanism comprises a movable detection frame (5) arranged outside the furnace tube (4); the movable detection frame (5) is installed in the furnace chamber via a lifting screw (7) and a guide rod (8); one end of the lifting screw (7) is fixedly connected to a lifting motor (9) installed outside the furnace body (1); the lifting motor (9) is used to drive the movable detection frame (5) to move up and down along the lifting screw (7) and the guide rod (8); The other end of the lifting screw (7) is rotatably connected to the furnace body (1), and a temperature sensor (6) is provided on the movable detection frame (5).

2. The furnace temperature monitoring device for a heating furnace for waste mineral oil recovery according to claim 1, characterized in that: A through hole is provided on the movable detection frame (5) at a position corresponding to the guide rod (8); a limit ring (51) is fixedly connected to a position corresponding to the lifting screw (7) on the movable detection frame (5); and a first thread (52) is provided inside the limit ring (51); the first thread (52) matches the second thread (71) on the lifting screw (7).

3. The furnace temperature monitoring device for a heating furnace for waste mineral oil recovery according to claim 2, characterized in that: A plurality of temperature sensors (6) are evenly distributed on the movable detection frame (5), and the probes of the temperature sensors (6) are aligned with the furnace tube (4).

4. The furnace temperature monitoring device for a heating furnace for waste mineral oil recovery according to claim 3, characterized in that: A displacement sensor (10) is installed inside the furnace body (1), a probe of the displacement sensor (10) is connected to the movable detection frame (5), and the displacement sensor (10) is used to detect the lifting position of the movable detection frame (5).

5. The furnace temperature monitoring device for a heating furnace for waste mineral oil recovery according to claim 1, characterized in that: It also includes an internal detection mechanism (11), which detects the internal temperature of the furnace tube (4) through an infrared temperature sensor (1107).

6. The furnace temperature monitoring device for a heating furnace for waste mineral oil recovery according to claim 5, characterized in that: The internal detection mechanism (11) comprises a detection box (1101), wherein an infrared temperature sensor (1107) and a rotatable reflector (1105) are installed inside the detection box (1101), wherein the reflector (1105) is installed on the rotating shaft of the second rotating motor (1104), and the light from the infrared temperature sensor (1107) is reflected to the furnace tube (4) through the reflector (1105), and the second rotating motor (1104) is used to drive the reflector (1105) to rotate, thereby detecting the temperature at different positions in the vertical direction of the furnace tube (4).

7. The furnace temperature monitoring device for a heating furnace for waste mineral oil recovery according to claim 6, characterized in that: A rotating motor 1 (1102) is installed inside the detection box (1101), the output shaft of the rotating motor 1 (1102) is connected to the rotating motor 2 (1104), and the rotating shaft (1103) of the rotating motor 1 (1102) is perpendicular to the rotating shaft of the rotating motor 2 (1104); The infrared temperature sensor (1107) is fixed to the rotating shaft (1103) via a bracket (1106), and the rotating motor (1102) drives the rotating motor (1104), the reflector (1105) and the infrared temperature sensor (1107) to rotate synchronously via the rotating shaft (1103), thereby detecting the temperature at different positions in the horizontal direction of the furnace tube (4).

8. The furnace temperature monitoring device for a heating furnace for waste mineral oil recovery according to claim 7, characterized in that: An infrared distance sensor (1108) is integrated on the infrared temperature sensor (1107), and a probe of the infrared distance sensor (1108) is aligned with the reflector (1105).

9. The furnace temperature monitoring device for a heating furnace for waste mineral oil recovery according to claim 7, characterized in that: Angle sensors (1109) are installed on the rotating shaft (1103) of the rotating motor 1 (1102) and the rotating shaft of the rotating motor 2 (1104).

10. The furnace temperature monitoring device of a heating furnace for waste mineral oil recovery according to claim 1, characterized in that: A control box (12) is installed outside the furnace body (1), and the control box (12) is used to receive data from various sensors and control the operation of various motors.

Images