Industrial waste gas automatic detection device and method

Abstract

The invention discloses an industrial waste gas automatic detection device and method, and particularly relates to the technical field of waste gas detection.The industrial waste gas automatic detection device comprises a mounting frame, an air inlet barrel is fixedly connected to one side of the top of the mounting frame, a fan cover is arranged at one end of the air inlet barrel, and a heat tracing pipeline is connected to the inner wall of the air inlet barrel; a plurality of heat tracing pipelines are arranged at equal intervals, one end of the air inlet barrel communicates with a condensation chamber, the end, away from the air inlet barrel, of the condensation chamber communicates with a demister, one side of the demister communicates with a detection cavity, an analysis and detection unit is arranged in the detection cavity, and a sweeping assembly is arranged on one side of a particle filter plate. A fan frame is fixedly connected to the inner wall of one side of the air inlet barrel; the cleaning assembly is reversely driven by the fan shaft, so that the cleaning brush can clean the surface of the particle filter plate, the detection precision can be guaranteed in the subsequent detection process, and the situation that the subsequent waste gas detection precision is affected due to the fact that residual particles escape fine dust or gas is avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of waste gas detection, and more particularly to an industrial waste gas automatic detection device and method. BACKGROUND

[0002] The industrial waste gas automatic detection device realizes the detection task of industrial waste gas through communication with waste gas, facilitates data collection work, helps real-time monitoring of waste gas, and better performs multi-directional and all-around waste gas data collection work. The industrial waste gas contains a large amount of harmful substances, and the installation of the detection equipment realizes the monitoring of particulate matter, sulfide and nitrogen oxide, which is more conducive to the requirement of environmental protection. After retrieval, the existing patent No. CN110108841B discloses an industrial waste gas automatic detection device, which belongs to the technical field of industrial waste gas detection and comprises a vehicle frame, a lifting assembly, a swing assembly, a conveying assembly, a detection assembly and a filtering assembly. The lifting assembly, the conveying assembly, the detection assembly and the filtering assembly are all arranged on the top of the vehicle frame. The lifting assembly is arranged at one end of the vehicle frame. The swing assembly is arranged on the lifting assembly and fixedly connected with the lifting assembly. The conveying assembly is arranged beside the lifting assembly, and one end of the conveying assembly is arranged on the swing assembly. The detection assembly is arranged beside the conveying assembly, and the output end of the conveying assembly is communicated with the detection assembly. The filtering assembly is arranged beside the detection assembly, and the filtering assembly and the detection assembly are communicated. The lifting assembly is used for extracting and detecting waste gas at different height positions, and the swing assembly is used for extracting and detecting waste gas at different directions and angles, so that multi-directional and all-around detection of waste gas is realized. The inventor found the following problems in the prior art during the implementation of the application. The existing waste gas detection device is usually cleaned by a back blowing system after single detection, and the residual particles attached to the surface of the filter plate are difficult to be completely removed. The scattered fine dust or gas released by the attached residual particles can easily affect the subsequent waste gas detection precision. Therefore, the application provides an industrial waste gas automatic detection device and method to solve the above problems.

[0003] APPLICATION CONTENT In order to overcome the above-mentioned defects of the prior art, the application provides an industrial waste gas automatic detection device and method to solve the problems in the background art.

[0004] In order to achieve the above object, the present application provides the following technical scheme: an industrial waste gas automatic detection device, comprising a mounting frame, one side of the top of the mounting frame is fixedly connected with an air inlet cylinder, one end of the air inlet cylinder is provided with a wind cover, the inner wall of the air inlet cylinder is connected with a heat tracing pipeline, and the heat tracing pipeline is provided with multiple groups of equidistant arrangements, one end of the air inlet cylinder is communicated with a condensation chamber, the end of the condensation chamber away from the air inlet cylinder is communicated with a demister, one side of the demister is communicated with a detection cavity, an analysis and detection unit is arranged in the cavity of the detection cavity, one side of the middle of the air inlet cylinder is provided with a particle filter plate, one side of the particle filter plate is provided with a cleaning assembly, the inner wall of one side of the air inlet cylinder is fixedly connected with a fan frame, one end of the middle of the fan frame is connected with a fan shaft through a bearing, and the outer wall of the fan shaft is fixedly connected with a spiral vane fan.

[0005] Preferably, the outer wall of the side of the fan frame away from the fan shaft is fixedly connected with a high-temperature-resistant motor, the output end of the high-temperature-resistant motor is connected with the fan shaft through a bearing, the high-temperature-resistant motor drives the fan shaft to rotate, and the rotation of the fan shaft drives the spiral vane fan to rotate synchronously.

[0006] Preferably, the middle inner wall of the air inlet cylinder is fixedly connected with an auxiliary frame, the middle of the auxiliary frame is fixedly connected with a small reducer, the input end of the small reducer is fixedly connected with the fan shaft, the output end of the small reducer is fixedly connected with an output shaft through a shaft coupling, and the end of the output shaft is fixedly connected with a first end face ratchet disc.

[0007] Preferably, the cleaning assembly comprises a cleaning shaft, a rotating strip and a cleaning brush, the center of the particle filter plate is connected with the cleaning shaft through a bearing, one end of the cleaning shaft is fixedly connected with the rotating strip, the end of the rotating strip close to the particle filter plate is fixedly connected with the cleaning brush, the cleaning brush abuts against the particle filter plate, and the edge of the rotating strip is fixedly connected with a gear ring.

[0008] Preferably, the end of the cleaning shaft away from the rotating strip penetrates through the particle filter plate and is connected with a connecting disc, one end of the connecting disc is fixedly connected with a spring, the spring is provided with multiple groups and equidistant arrangements, the end of the spring away from the connecting disc is fixedly connected with a second end face ratchet disc, the second end face ratchet disc is engaged with the first end face ratchet disc, the edge of the connecting disc and the second end face ratchet disc is connected with an extension rod, and the extension rod is provided with multiple groups and equidistant arrangements.

[0009] Preferably, a ceramic honeycomb tube bundle is arranged at the communication between the demister and the detection cavity, the analysis and detection unit comprises a carbon monoxide detector, a sulfur dioxide detector and a nitrogen oxide detector, one side of the carbon monoxide detector is provided with the sulfur dioxide detector, and one side of the sulfur dioxide detector is provided with the nitrogen oxide detector.

[0010] Preferably, the bottom end of the air inlet cylinder is provided with a waste collecting mechanism, the waste collecting mechanism comprises a particle collecting bin, a transmission shaft, a transmission roller, a transmission belt, a blocking strip, a first gear, a second gear, a third gear and a synchronous toothed belt, the middle part of the particle collecting bin is connected with the transmission shaft through a bearing, the two side ends of the particle collecting bin are connected with the transmission roller through a bearing, the outer walls of the two groups of transmission rollers are connected with the transmission belt, the surface of the transmission belt is connected with the blocking strip, and the blocking strip is provided with multiple groups and is arranged at equal intervals.

[0011] Preferably, one end of the transmission shaft is connected with the first gear through the particle collecting bin, the first gear is engaged with a toothed ring, the first gear is provided with the second gear on one side, one end of the transmission roller on one side is connected with the third gear through the particle collecting bin, the second gear and the third gear are connected through the synchronous toothed belt, the middle part of the outer wall of the transmission shaft is fixedly connected with a cam, and the outer wall of the cam abuts against the bottom outer wall of the transmission belt.

[0012] Preferably, one side of the detection cavity is provided with an exhaust port, the exhaust port and the middle part of the air cover are both provided with an electric valve, one side of the exhaust port is provided with a back flushing connector, the inner walls of the air inlet cylinder and the detection cavity are both provided with a temperature sensor, one side of the mounting frame is provided with a display controller, and the top of the detection cavity is provided with a buzzer.

[0013] The method comprises the following steps: Step one: waste gas collection, industrial waste gas enters the air inlet cylinder through the air cover, the spiral blade fan forms negative pressure under the drive of the fan shaft to guide the gas flow, the particle filter plate intercepts particulate matter, a plurality of heat tracing pipelines maintain the temperature of the gas flow to prevent condensation, the waste gas enters the condensing chamber, is cooled to the water vapor condensation temperature through the internal semiconductor refrigerator, and then is removed through the mist eliminator to ensure that the waste gas is dry; Step two: waste gas detection, the dry waste gas is converted into a stable laminar flow through the ceramic honeycomb tube bundle, stably enters the detection cavity, and is detected by a carbon monoxide detector, a sulfur dioxide detector and a nitrogen oxide compound detector respectively, the carbon monoxide detector adopts a 4.6 μm wavelength non-dispersive infrared technology, the optical path is expanded to 15 meters through a miniature multi-reflection cavity, the sulfur dioxide detector adopts an ultraviolet fluorescence principle, an ozone cleaning unit automatically decomposes hydrocarbon interference substances, the nitrogen oxide compound detector configures a molybdenum catalytic converter through a chemiluminescence method to efficiently convert NO2 into NO, and the three devices are linearly arranged, so that the composition of the waste gas is detected; Step three: back flushing cleaning, after the waste gas detection is completed, the waste gas is released and discharged through the exhaust port, and the back flushing mode is realized by connecting the gas pipe to the back flushing connector to back flush the detection cavity to the whole path of the air inlet cylinder in the reverse direction; Step four: the high-temperature-resistant motor drives the fan shaft to rotate counterclockwise, the first end face ratchet disc and the second end face ratchet disc are in contact as the occlusal surface when rotating counterclockwise, so that the rotation of the first end face ratchet disc can drive the second end face ratchet disc to rotate synchronously, the rotation of the second end face ratchet disc drives the extension rod and the connecting disc to rotate synchronously, thereby driving the cleaning shaft and the rotating bar to rotate, and the cleaning brush realizes the cleaning of the surface of the particle filter plate.

[0014] Technical effects and advantages of the present application: 1. Compared with the prior art, the industrial waste gas automatic detection device and method drives the fan shaft to rotate counterclockwise through the high-temperature-resistant motor in the back blowing process, the first end face ratchet disc and the second end face ratchet disc are in contact as the occlusal surface when rotating counterclockwise, so that the rotation of the first end face ratchet disc can drive the second end face ratchet disc to rotate synchronously, the rotation of the second end face ratchet disc drives the extension rod and the connecting disc to rotate synchronously, thereby driving the cleaning shaft and the rotating bar to rotate, and the cleaning brush realizes the cleaning of the surface of the particle filter plate, and cooperates with back blowing to clean the particles attached to the particle filter plate, so as to ensure the detection accuracy in the subsequent detection process, avoid the influence of residual particles on the subsequent waste gas detection accuracy.

[0015] 2. Compared with the prior art, the industrial waste gas automatic detection device and method drives the fan shaft to rotate counterclockwise to drive the transmission belt to rotate, and the transmission shaft periodically presses the bottom of the transmission belt through the middle cam, so that the particles attached to the surface of the bottom of the transmission belt are shaken off into the particle collection bin, thereby completing the collection of residual particles after back blowing, so as to facilitate centralized cleaning and discharge, avoid the particles from being attached to the particle filter plate and remaining in the bottom of the air inlet cylinder, and convert the remaining energy of the cleaning system into collection power through the meshing of the gear ring and the first gear, without the need for additional motor drive, thereby saving energy. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the internal structure of the air inlet cylinder of the present application; Figure 3 It is a schematic diagram of the connection structure of the transmission shaft and the cam of the present application; Figure 4 It is a schematic diagram of the connection structure of the first end face ratchet disc and the second end face ratchet disc of the present application; Figure 5 It is a schematic diagram of the connection structure of the waste collection mechanism of the present application; Figure 6 It is a schematic diagram of the connection structure of the transmission shaft and the transmission roller of the present application; Figure 7 It is a schematic diagram of the detection cavity structure of the present application; Figure 8This is a schematic diagram of the connection structure between the first gear and the gear ring in this application.

[0017] The attached diagram is labeled as follows: 1. Mounting bracket; 2. Air inlet duct; 201. Fan hood; 202. Heat tracing pipeline; 3. Condensation chamber; 4. Demister; 5. Detection chamber; 6. Analysis and detection unit; 601. Carbon monoxide detector; 602. Sulfur dioxide detector; 603. Nitrogen oxides detector; 7. Particulate filter plate; 8. Cleaning assembly; 801. Cleaning shaft; 802. Rotating bar; 803. Cleaning brush; 804. Gear ring; 9. Fan frame; 10. Fan shaft; 11. Spiral blade fan; 12. High-temperature resistant motor; 13. Auxiliary frame; 14. Small reducer; 15. Output. 16. Shaft; 17. No. 1 end face ratchet disc; 18. Connecting disc; 19. Spring; 20. No. 2 end face ratchet disc; 21. Telescopic rod; 22. Ceramic honeycomb tube bundle; 22. Waste collection mechanism; 221. Particle collection bin; 222. Drive shaft; 223. Drive roller; 224. Drive belt; 225. Stop bar; 226. No. 1 gear; 227. No. 2 gear; 228. No. 3 gear; 229. Synchronous toothed belt; 23. Cam; 24. Exhaust port; 25. Electric valve; 26. Backflush connector; 27. Temperature sensor; 28. Display controller; 29. ​​Buzzer. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example 1

[0019] As attached Figures 1 to 8 An automatic industrial waste gas detection device is shown, including a mounting frame 1. An air inlet duct 2 is fixedly connected to one side of the top of the mounting frame 1. A fan hood 201 is provided at one end of the air inlet duct 2. A heat tracing pipeline 202 is connected to the inner wall of the air inlet duct 2, and multiple sets of heat tracing pipelines 202 are arranged at equal intervals. A condensation chamber 3 is connected to one end of the air inlet duct 2. A demister 4 is connected to the end of the condensation chamber 3 away from the air inlet duct 2. A detection chamber 5 is connected to one side of the demister 4. An analysis and detection unit 6 is provided inside the detection chamber 5. A particle filter plate 7 is provided on one side of the middle of the air inlet duct 2. A cleaning component 8 is provided on one side of the particle filter plate 7. A fan frame 9 is fixedly connected to the inner wall of one side of the air inlet duct 2. A fan shaft 10 is connected to the middle of one end of the fan frame 9 through a bearing. A spiral fan blade 11 is fixedly connected to the outer wall of the fan shaft 10.

[0020] The mounting bracket 1 serves a fixing function and can be connected to the exhaust gas pipeline through the fan hood 201. The exhaust gas enters the air inlet duct 2 through the fan hood 201. The particulate filter plate 7 intercepts large particles. The spiral fan 11 forms a negative pressure induced airflow under the drive of the fan shaft 10. Multiple sets of heat tracing pipelines 202 heat the entire process, making the exhaust gas temperature higher than the water dew point to prevent condensation and adsorption. Then, the exhaust gas passes through the condensation chamber 3 and the demister 4 in sequence before entering the detection chamber 5. The semiconductor cooler inside the condensation chamber 3 can cool the gas to the point of water vapor condensation. After condensation, the gas passes through the demister 4 to remove liquid water mist and further dehydrate it, so that it is in a dry state when entering the detection chamber 5, avoiding water vapor from affecting the detection of the analysis and detection unit 6. The exhaust gas is then detected by the analysis and detection unit 6. Example 2

[0021] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 8 As shown below, see details: In a preferred embodiment, a high-temperature resistant motor 12 is fixedly connected to the outer wall of the fan frame 9 on the side away from the fan shaft 10. The output end of the high-temperature resistant motor 12 is connected to the fan shaft 10 through a bearing. The high-temperature resistant motor 12 drives the fan shaft 10 to rotate, and the rotation of the fan shaft 10 drives the spiral blade fan 11 to rotate synchronously. The high-temperature resistant motor 12 plays a driving role and can drive the fan shaft 10 and the spiral blade fan 11 to induce airflow by rotating forward, or change the airflow path by reversing to assist in backflushing cleaning.

[0022] In a preferred embodiment, an auxiliary frame 13 is fixedly connected to the inner wall of the middle section of the air inlet duct 2. A small reducer 14 is fixedly connected to the middle section of the auxiliary frame 13. The input end of the small reducer 14 is fixedly connected to the fan shaft 10. The output end of the small reducer 14 is fixedly connected to the output shaft 15 through a coupling. The end of the output shaft 15 is fixedly connected to a first end face ratchet disc 16. The auxiliary frame 13 serves to fix the small reducer 14. The small reducer 14 is a planetary reducer that enables the fan shaft 10 to drive the output shaft 15 to rotate while simultaneously reducing its speed. The rotation of the output shaft 15 drives the first end face ratchet disc 16 to rotate synchronously.

[0023] In a preferred embodiment, the cleaning assembly 8 includes a cleaning shaft 801, a rotating bar 802, and a cleaning brush 803. The cleaning shaft 801 is connected to the center of the particle filter plate 7 via a bearing. The rotating bar 802 is fixedly connected to one end of the cleaning shaft 801. The cleaning brush 803 is fixedly connected to the end of the rotating bar 802 near the particle filter plate 7. The cleaning brush 803 abuts against the particle filter plate 7. A toothed ring 804 is fixedly connected to the edge of the rotating bar 802. The cleaning shaft 801 can rotate along the center of the particle filter plate 7. The rotation of the cleaning shaft 801 can drive the rotating bar 802 to swing, so that the cleaning brush 803 scrapes off the dust on the surface of the particle filter plate 7. This prevents the fine dust adhering to the surface of the particle filter plate 7 from being carried into the detection chamber 5 by the airflow, and at the same time prevents the accumulated particle dust from escaping into the exhaust gas and affecting the subsequent detection accuracy.

[0024] In a preferred embodiment, the end of the cleaning shaft 801 furthest from the rotating bar 802 passes through the particle filter plate 7 and is connected to a connecting disc 17. A spring 18 is fixedly connected to one end of the connecting disc 17. Multiple sets of springs 18 are arranged at equal intervals. A second end face ratchet disc 19 is fixedly connected to the end of the spring 18 furthest from the connecting disc 17. The second end face ratchet disc 19 engages with the first end face ratchet disc 16. A telescopic rod 20 is connected to the edge of the connecting disc 17 and the second end face ratchet disc 19 for telescopic movement. Multiple sets of rods 20 are arranged at equal intervals. When the spiral fan 11 inside the air inlet duct 2 forms a negative pressure induced airflow under the drive of the fan shaft 10, the fan shaft 10 drives the output shaft 15 to rotate with the first end face ratchet disc 16 through the small reducer 14. The first end face ratchet disc 16 rotates clockwise. Since the first end face ratchet disc 16 and the second end face ratchet disc 19 are in inclined contact when rotating clockwise, the spring 18 prevents the two sets from fully engaging, thus the first end face ratchet disc 19... When the first end ratchet 16 rotates clockwise, it pushes the second end ratchet 19 to retract in one direction relative to the spring 18. This prevents the air inlet duct 2 from driving the cleaning shaft 801 to rotate under negative pressure, thus avoiding interference from the rotating bar 802. When the device is backflushed for cleaning after testing, the high-temperature motor 12 drives the fan shaft 10 to rotate counterclockwise. The first end ratchet 16 and the second end ratchet 19 are in contact when rotating counterclockwise, thus the first end ratchet 16... The rotation of the 6-axis can drive the second end face ratchet disc 19 to rotate synchronously. The rotation of the second end face ratchet disc 19 drives the telescopic rod 20 and the connecting disc 17 to rotate synchronously, thereby driving the cleaning shaft 801 and the rotating bar 802 to rotate, so as to realize the cleaning brush 803 to clean the surface of the particle filter plate 7. At the same time, it works in conjunction with backflushing to clean the particles attached to the particle filter plate 7, so as to ensure the detection accuracy during subsequent testing and avoid residual particles escaping fine dust or gas that may affect the accuracy of subsequent exhaust gas detection.

[0025] In a preferred embodiment, a ceramic honeycomb tube bundle 21 is provided at the connection between the demister 4 and the detection chamber 5. The analysis and detection unit 6 includes a carbon monoxide detector 601, a sulfur dioxide detector 602, and a nitrogen oxide detector 603. The sulfur dioxide detector 602 is located on one side of the carbon monoxide detector 601, and the nitrogen oxide detector 603 is located on one side of the sulfur dioxide detector 602. After the exhaust gas is de-dropped by the demister 4, it enters the ceramic honeycomb tube bundle 21. The tube bundle converts the turbulent exhaust gas into a stable laminar flow through its hexagonal microporous channels. The carbon monoxide detector 601 uses 4.6μm wavelength non-dispersive infrared technology and extends the optical path to 15 meters through a micro multi-reflection cavity. The sulfur dioxide detector 602 uses the ultraviolet fluorescence principle. The ozone cleaning unit automatically decomposes hydrocarbon interferences. The nitrogen oxide detector 603 uses a molybdenum catalytic converter configured with chemiluminescence to efficiently convert NO2 into NO. The three devices are arranged linearly to detect the components of the exhaust gas.

[0026] In a preferred embodiment, a waste collection mechanism 22 is provided at the bottom of the air inlet duct 2. The waste collection mechanism 22 includes a particle collection bin 221, a drive shaft 222, drive rollers 223, a drive belt 224, baffles 225, a first gear 226, a second gear 227, a third gear 228, and a synchronous toothed belt 229. The drive shaft 222 is connected to the middle of the particle collection bin 221 via a bearing. Both ends of the particle collection bin 221 are connected to drive rollers 223 via bearings. The outer walls of the two sets of drive rollers 223 are connected to the drive belts 224, and baffles are connected to the surface of the drive belts 224. 225, multiple sets of baffles 225 are arranged at equal intervals. One end of the drive shaft 222 passes through the particle collection chamber 221 and is connected to a first gear 226. The first gear 226 meshes with the gear ring 804. A second gear 227 is arranged on one side of the first gear 226. One end of the drive roller 223 on one side passes through the particle collection chamber 221 and is connected to a third gear 228. The second gear 227 and the third gear 228 are connected by a synchronous toothed belt 229. A cam 23 is fixedly connected to the outer wall of the middle part of the drive shaft 222. The outer wall of the cam 23 abuts against the bottom outer wall of the drive belt 224. After being scraped by the cleaning assembly 8, the particulate matter settles onto the surface of the transmission belt 224 by gravity. When the toothed ring 804 rotates with the cleaning shaft 801, it drives the meshing first gear 226 to rotate. The rotation of the first gear 226 drives the transmission shaft 222 to rotate synchronously. The rotation of the transmission shaft 222 drives the second gear 227 to rotate synchronously. The second gear 227 drives the third gear 228 to rotate via the synchronous toothed belt 229. The third gear 228 drives the transmission roller 223 to rotate, causing the transmission belt 224, whose surface is densely covered with baffles 225, to move in a directional manner. The baffles 225 continuously push the belt during the movement. Settled particles slide into the particle collection chamber 221. At the same time, the drive shaft 222 periodically presses the bottom of the drive belt 224 through the central cam 23, causing it to vibrate at a high frequency and a small amplitude. This shakes the particles attached to the bottom surface of the drive belt 224 into the particle collection chamber 221, thus completing the backflushing and collecting the residual particles for centralized cleaning and discharge. This prevents particles from remaining at the bottom of the air inlet duct 2 after being discharged from the particle filter plate 7. The meshing of the gear ring 804 and the first gear 226 converts the residual energy of the cleaning system into collection power, eliminating the need for an additional motor drive and achieving energy saving.

[0027] In a preferred embodiment, an exhaust port 24 is provided on one side of the detection chamber 5. An electric valve 25 is provided in the middle of both the exhaust port 24 and the hood 201. A backflush connector 26 is provided on one side of the exhaust port 24. Temperature sensors 27 are provided on the inner walls of both the air inlet duct 2 and the detection chamber 5. A display controller 28 is provided on one side of the mounting bracket 1. A buzzer 29 is provided on the top of the detection chamber 5. After the exhaust gas is detected, it is released and discharged through the exhaust port 24. The backflush connector 26 can be connected to an external air pipe to backflush inert gas to achieve the backflush mode, which reverses the entire path from the detection chamber 5 to the air inlet duct 2. The temperature sensor 27 monitors the temperature rise of key nodes in real time, and the data is uploaded to the display controller 28 for dynamic compensation. If the temperature in the detection chamber 5 exceeds the limit or the concentration is abnormal, the buzzer 29 will immediately sound an audible and visual alarm.

[0028] In a preferred embodiment, the method includes the following steps: Step 1: Waste gas collection. Industrial waste gas enters the air inlet duct 2 through the hood 201. The spiral fan 11 forms a negative pressure induced airflow under the drive of the fan shaft 10. The particle filter plate 7 intercepts particulate matter. Multiple sets of heat tracing pipelines 202 maintain the airflow temperature to prevent condensation. The waste gas enters the condensation chamber 3 and is cooled to the water vapor condensation temperature by the internal semiconductor cooler. Then, it passes through the demister 4 to remove liquid water mist, ensuring that the waste gas is dry. Step 2: Exhaust gas detection. The dried exhaust gas is converted into a stable laminar flow through the ceramic honeycomb tube bundle 21 and enters the detection chamber 5 stably. It is then detected by a carbon monoxide detector 601, a sulfur dioxide detector 602, and a nitrogen oxide detector 603. The carbon monoxide detector 601 uses 4.6μm wavelength non-dispersive infrared technology and extends the optical path to 15 meters through a micro multi-reflection cavity. The sulfur dioxide detector 602 uses the principle of ultraviolet fluorescence, and the ozone cleaning unit automatically decomposes hydrocarbon interferences. The nitrogen oxide detector 603 uses a chemiluminescence method with a molybdenum catalytic converter to efficiently convert NO2 into NO. The three devices are arranged linearly to detect the composition of the exhaust gas. Step 3: Backflushing cleaning. After the exhaust gas detection is completed, it is released and discharged through the exhaust port 24. The inert gas is backflushed through the external air pipe of the backflushing connector 26 to achieve the backflushing mode, and the entire path from the detection chamber 5 to the air inlet duct 2 is flushed in reverse. Step 4: The high-temperature resistant motor 12 drives the fan shaft 10 to rotate counterclockwise. The ratchet disc 16 on the first end face and the ratchet disc 19 on the second end face are in contact with each other when rotating counterclockwise. Thus, the rotation of the ratchet disc 16 on the first end face can drive the ratchet disc 19 on the second end face to rotate synchronously. The rotation of the ratchet disc 19 on the second end face drives the telescopic rod 20 and the connecting plate 17 to rotate synchronously, thereby driving the cleaning shaft 801 and the rotating bar 802 to rotate. This enables the cleaning brush 803 to clean the surface of the particle filter plate 7. At the same time, it works in conjunction with backflushing to clean the particles attached to the particle filter plate 7, so as to ensure the detection accuracy during subsequent testing and avoid residual particles escaping fine dust or gas that may affect the accuracy of subsequent exhaust gas detection.

[0029] The working process of this application is as follows: First, the exhaust gas is connected to the exhaust gas pipeline through the hood 201. The exhaust gas enters the air inlet duct 2 through the hood 201. The particle filter plate 7 intercepts large particles. The spiral fan 11 forms a negative pressure induced airflow under the drive of the fan shaft 10. Multiple sets of heat tracing pipelines 202 heat the entire process so that the exhaust gas temperature is higher than the water dew point to prevent condensation and adsorption. Then, the exhaust gas passes through the condensation chamber 3 and the demister 4 in sequence and enters the detection chamber 5. The semiconductor cooler inside the condensation chamber 3 can cool the gas to water vapor condensation. After condensation, the gas passes through the demister 4 to remove liquid water mist and further dehydrate it to keep it in a dry state when entering the detection chamber 5, so as to avoid water vapor affecting the detection of the analysis and detection unit 6. Then, the exhaust gas is detected by the analysis and detection unit 6. When the spiral fan 11 inside the air inlet duct 2 forms a negative pressure induced airflow under the drive of the fan shaft 10, the fan shaft 10 drives the output shaft 15 to rotate with the first end face ratchet disc 16 through the small reducer 14. The first end face ratchet disc 16 rotates clockwise. Since the first end face ratchet disc 16 and the second end face ratchet disc 19 are in inclined contact when rotating clockwise, the spring 18 prevents the two sets from fully engaging. Therefore, the first end face ratchet disc 16 rotates clockwise... When the needle rotates, it pushes the second end face ratchet disc 19 back towards the spring 18, thus preventing the air inlet duct 2 from driving the cleaning shaft 801 to rotate under negative pressure airflow. This avoids the rotating bar 802 affecting airflow suction. When the device is backflushed for cleaning after the test, the high-temperature motor 12 drives the fan shaft 10 to rotate counterclockwise. The first end face ratchet disc 16 and the second end face ratchet disc 19 are in contact with each other during counterclockwise rotation, thus the first end face ratchet disc 16... The rotation of the 6-axis can drive the second end face ratchet disc 19 to rotate synchronously. The rotation of the second end face ratchet disc 19 drives the telescopic rod 20 and the connecting disc 17 to rotate synchronously, thereby driving the cleaning shaft 801 and the rotating bar 802 to rotate, realizing the cleaning brush 803 to clean the surface of the particle filter plate 7. At the same time, it cooperates with backflushing to clean the particles attached to the particle filter plate 7, so as to ensure the detection accuracy in subsequent detection processes and avoid residual particles escaping fine dust or gas that may affect the subsequent exhaust gas detection accuracy. Then, through the meshing of the gear ring 804 and the first gear 226, the residual energy of the cleaning system is converted into collection power, eliminating the need for an additional motor drive and achieving an energy-saving effect. After the exhaust gas detection is completed, it is released and discharged through the exhaust port 24. The backflushing mode is achieved by connecting the backflushing joint 26 to the external air pipe and backflushing inert gas, which reverses the entire path from the detection chamber 5 to the air inlet duct 2. The above is the working principle of this industrial exhaust gas automatic detection device and method.

Claims

1. An automatic industrial waste gas detection device, comprising a mounting frame (1), characterized in that: An air inlet duct (2) is fixedly connected to one side of the top of the mounting frame (1). A fan hood (201) is provided at one end of the air inlet duct (2). A heat tracing pipeline (202) is connected to the inner wall of the air inlet duct (2), and the heat tracing pipeline (202) is arranged in multiple sets at equal intervals. A condenser chamber (3) is connected to one end of the air inlet duct (2). A demister (4) is connected to the end of the condenser chamber (3) away from the air inlet duct (2). A detection chamber (5) is connected to one side of the demister (4). An analysis and detection unit (6) is provided inside the detection chamber (5). A particle filter plate (7) is provided on one side of the middle of the air inlet duct (2). A cleaning assembly (8) is provided on one side of the particle filter plate (7). A fan frame (9) is fixedly connected to one side of the inner wall of the air inlet duct (2). A fan shaft (10) is connected to the middle of one end of the fan frame (9) through a bearing. A spiral fan (11) is fixedly connected to the outer wall of the fan shaft (10).

2. The automatic industrial waste gas detection device according to claim 1, characterized in that: A high-temperature resistant motor (12) is fixedly connected to the outer wall of the fan frame (9) away from the fan shaft (10). The output end of the high-temperature resistant motor (12) is connected to the fan shaft (10) through a bearing. The high-temperature resistant motor (12) drives the fan shaft (10) to rotate. The rotation of the fan shaft (10) drives the spiral blade fan (11) to rotate synchronously.

3. The automatic industrial waste gas detection device according to claim 2, characterized in that: An auxiliary frame (13) is fixedly connected to the inner wall of the middle part of the air inlet duct (2). A small reducer (14) is fixedly connected to the middle part of the auxiliary frame (13). The input end of the small reducer (14) is fixedly connected to the fan shaft (10). The output end of the small reducer (14) is fixedly connected to the output shaft (15) through a coupling. A first end face ratchet disc (16) is fixedly connected to the end of the output shaft (15).

4. The automatic industrial waste gas detection device according to claim 1, characterized in that: The cleaning assembly (8) includes a cleaning shaft (801), a rotating bar (802), and a cleaning brush (803). The cleaning shaft (801) is connected to the center of the particle filter plate (7) via a bearing. The rotating bar (802) is fixedly connected to one end of the cleaning shaft (801). The cleaning brush (803) is fixedly connected to the end of the rotating bar (802) near the particle filter plate (7). The cleaning brush (803) abuts against the particle filter plate (7). A toothed ring (804) is fixedly connected to the edge of the rotating bar (802).

5. The automatic industrial waste gas detection device according to claim 4, characterized in that: The cleaning shaft (801) is connected to a connecting disc (17) at one end away from the rotating bar (802) through the particle filter plate (7). A spring (18) is fixedly connected to one end of the connecting disc (17). Multiple sets of springs (18) are arranged at equal intervals. A second end face ratchet disc (19) is fixedly connected to one end of the spring (18) away from the connecting disc (17). The second end face ratchet disc (19) meshes with the first end face ratchet disc (16). A telescopic rod (20) is connected to the edge of the connecting disc (17) and the second end face ratchet disc (19). Multiple sets of telescopic rods (20) are arranged at equal intervals.

6. The automatic industrial waste gas detection device according to claim 1, characterized in that: A ceramic honeycomb tube bundle (21) is provided at the connection between the demister (4) and the detection chamber (5). The analysis and detection unit (6) includes a carbon monoxide detector (601), a sulfur dioxide detector (602), and a nitrogen oxide detector (603). A sulfur dioxide detector (602) is provided on one side of the carbon monoxide detector (601), and a nitrogen oxide detector (603) is provided on one side of the sulfur dioxide detector (602).

7. The automatic industrial waste gas detection device according to claim 3, characterized in that: The bottom end of the air inlet duct (2) is provided with a waste collection mechanism (22). The waste collection mechanism (22) includes a particle collection bin (221), a drive shaft (222), a drive roller (223), a drive belt (224), a baffle (225), a first gear (226), a second gear (227), a third gear (228), and a synchronous toothed belt (229). The middle part of the particle collection bin (221) is connected to the drive shaft (222) through a bearing. Both ends of the particle collection bin (221) are connected to the drive roller (223) through bearings. The outer walls of the two sets of drive rollers (223) are connected to the drive belt (224). The surface of the drive belt (224) is connected to the baffle (225). There are multiple sets of baffles (225) arranged at equal intervals.

8. An automatic industrial waste gas detection device according to claim 7, characterized in that: One end of the drive shaft (222) passes through the particle collection chamber (221) and is connected to a first gear (226). The first gear (226) meshes with a gear ring (804). A second gear (227) is provided on one side of the first gear (226). One end of the drive roller (223) on one side passes through the particle collection chamber (221) and is connected to a third gear (228). The second gear (227) and the third gear (228) are connected by a synchronous toothed belt (229). A cam (23) is fixedly connected to the outer wall of the middle part of the drive shaft (222). The outer wall of the cam (23) abuts against the bottom outer wall of the drive belt (224).

9. An automatic industrial waste gas detection device according to claim 6, characterized in that: An exhaust port (24) is provided on one side of the detection chamber (5). An electric valve (25) is provided in the middle of both the exhaust port (24) and the hood (201). A backflush connector (26) is provided on one side of the exhaust port (24). Temperature sensors (27) are provided on the inner walls of both the air inlet duct (2) and the detection chamber (5). A display controller (28) is provided on one side of the mounting bracket (1). A buzzer (29) is provided on the top of the detection chamber (5).

10. An automatic detection method for industrial waste gas, employing an automatic detection device for industrial waste gas as described in any one of claims 1-9, characterized in that: The method includes the following steps: Step 1: Waste gas collection. Industrial waste gas enters the air inlet duct (2) through the hood (201). The spiral blade fan (11) forms a negative pressure induced airflow under the drive of the fan shaft (10). The particle filter plate (7) intercepts particulate matter. Multiple sets of heat tracing pipelines (202) maintain the airflow temperature to prevent condensation. The waste gas enters the condensation chamber (3) and is cooled to the water vapor condensation temperature by the internal semiconductor refrigerator. Then, the liquid water mist is removed by the demister (4) to ensure that the waste gas is dry. Step 2: Exhaust gas detection. The dried exhaust gas is converted into a stable laminar flow through the ceramic honeycomb tube bundle (21) and enters the detection chamber (5) stably. It is detected by carbon monoxide detector (601), sulfur dioxide detector (602) and nitrogen oxide detector (603). The carbon monoxide detector (601) adopts 4.6μm wavelength non-dispersive infrared technology and extends the optical path to 15 meters through a micro multi-reflection cavity. The sulfur dioxide detector (602) adopts the principle of ultraviolet fluorescence and the ozone cleaning unit automatically decomposes hydrocarbon interference. The nitrogen oxide detector (603) is equipped with a molybdenum catalytic converter through chemiluminescence method to efficiently convert NO2 into NO. The three devices are arranged linearly to detect the composition of the exhaust gas. Step 3: Backflushing cleaning. After the exhaust gas detection is completed, it is released through the exhaust port (24). The inert gas is backflushed through the backflushing connector (26) to achieve the backflushing mode, and the entire path from the detection chamber (5) to the air inlet (2) is flushed in reverse. Step 4: The high-temperature motor (12) drives the fan shaft (10) to rotate counterclockwise. The first end face ratchet disc (16) and the second end face ratchet disc (19) are in contact with each other when rotating counterclockwise. Thus, the rotation of the first end face ratchet disc (16) can drive the second end face ratchet disc (19) to rotate synchronously. The rotation of the second end face ratchet disc (19) drives the telescopic rod (20) and the connecting disc (17) to rotate synchronously, thereby driving the cleaning shaft (801) and the rotating bar (802) to rotate, so as to realize the cleaning brush (803) to clean the surface of the particle filter plate (7). At the same time, it cooperates with the back-blowing to clean the particles attached to the particle filter plate (7) so as to ensure the detection accuracy in the subsequent detection process and avoid residual particles escaping fine dust or gas that affect the subsequent exhaust gas detection accuracy.

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