A device for monitoring ammonia escape from flue gas of a thermal power plant

Abstract

The application discloses a kind of thermal power plant flue gas escape ammonia monitoring devices, belongs to ammonia escape on-line monitoring technical field, and a kind of thermal power plant flue gas escape ammonia monitoring device thereof, including mounting piece, the side of the mounting piece is rotatably provided with transmission shaft, the side of the transmission shaft is rotatably provided with detection probe, the side of the mounting piece is provided with fixed cylinder cover, the side of the fixed cylinder cover is fixedly installed with outer cylinder cover, the inner chamber of the outer cylinder cover middle part is slidably provided with detection probe, by being provided with the structure of transmission shaft, hot air pipe and water inlet pipe, detection probe can be telescopic, the process of telescopic movement of detection probe, the probe position of detection probe is cleaned, in the application, by being provided with the structure of sealing rubber, in the telescopic process of detection probe, according to the process of blowing, cleaning, reblowing and cleaning again, detection probe is quickly self-cleaning, so that it can be quickly cleaned in a short time.

Description

Technical Field

[0001] This invention relates to the field of online ammonia escape monitoring technology, and more specifically, to a device for monitoring ammonia escape from flue gas in thermal power plants. Background Technology

[0002] In the flue gas treatment process, desulfurization and denitrification systems in thermal power plants commonly employ ammonia injection for denitrification. However, during actual operation, problems such as excessive ammonia injection, uneven ammonia injection, and fluctuations in operating conditions are prone to occur, leading to ammonia escape. Ammonia escape not only wastes resources and increases unit operating costs, but also readily combines with acidic substances in the flue gas to form ammonium salts. These salts adhere to the inner walls of flue ducts, heat exchangers, and dust removal equipment, causing blockages, corrosion, and scaling. This severely affects the operational stability and service life of the flue gas treatment system. Furthermore, excessive ammonia escape emissions cause secondary air pollution, failing to meet ultra-low emission environmental standards.

[0003] Existing ammonia escape monitoring devices in thermal power plants have significant technical defects under long-term continuous operation. The flue gas environment in thermal power plants is complex, containing a large amount of dust, particulate matter, viscous aerosols, and trace amounts of corrosive media. The monitoring probes are exposed inside the flue for sampling and detection for a long time, and dust, oil, and scale easily accumulate on their surfaces, causing a decrease in probe detection sensitivity, data drift, and increased monitoring errors, which seriously affects the accuracy and reliability of ammonia escape monitoring.

[0004] To address the issue of probe dust accumulation and contamination, existing monitoring equipment primarily employs two maintenance methods, both of which have significant shortcomings. One method involves shutdown and water washing, but when the probe is severely contaminated or malfunctions, the unit must be shut down for disassembly and cleaning. This method is not only cumbersome and labor-intensive, but it also disrupts continuous production, leading to decreased power generation efficiency and economic losses, failing to meet the uninterrupted monitoring needs of thermal power plants. The other method is the traditional fixed single-blowing cleaning method, which relies solely on ambient temperature compressed air to simply blow the probe surface. This method has limited airflow, pressure, and range, and is extremely ineffective at cleaning stubborn impurities with strong adhesion and hardened scale. It cannot thoroughly remove dust and scale buildup from probe gaps and sensing surfaces, and long-term use still results in monitoring distortion and equipment failure, making the cleaning and maintenance extremely unreliable.

[0005] Therefore, existing flue gas ammonia escape monitoring devices in thermal power plants have many technical defects, such as easy dust accumulation and contamination of probes, easy degradation of detection accuracy, the need for shutdown for deep cleaning, poor online dust removal effect, weak adaptability to operating conditions, and inability to achieve uninterrupted high-precision monitoring. They are difficult to meet the needs of modern thermal power plants for continuous, stable, accurate, and maintenance-free ammonia escape monitoring. Therefore, it is necessary to design a flue gas ammonia escape monitoring device for thermal power plants to solve the problems existing in the above-mentioned technologies. Summary of the Invention

[0006] The purpose of this invention is to provide a device for monitoring ammonia escape from flue gas in thermal power plants, so as to solve the problems mentioned in the background art.

[0007] A device for monitoring ammonia escape from flue gas in a thermal power plant includes an installation component. A drive shaft is rotatably mounted on one side of the installation component, and a detection probe is rotatably mounted on the side of the drive shaft. A fixing sleeve is provided on the side of the installation component, and an outer sleeve is fixedly mounted on the side of the fixing sleeve. A detection probe is slidably mounted in the middle of the inner cavity of the outer sleeve. The drive shaft and a blower mesh are threadedly connected. The lower end of the detection probe is rotatably connected to the drive shaft via a smooth circular rotation. A cleaning cylinder is fixedly mounted on one end of the outer sleeve. A water inlet pipe is fixedly installed on one side of the inner cavity of the outer sleeve, a hot air pipe is fixedly installed on one side of the outer sleeve located on the water inlet pipe, a drain pipe is fixedly installed on the outer sleeve at a position symmetrical to the water inlet pipe, and an exhaust pipe is fixedly installed on the side of the outer sleeve. An external air blower is fixedly installed at one end of the hot air duct, an internal air blower is fixedly installed on the side of the hot air duct near the external air blower, and an internal return air duct is fixedly installed at a position symmetrical to the internal air blower. A sealing rubber is fixedly installed in the middle of the cleaning cylinder. A first telescopic rubber ring is fixedly installed on one side of the inner cavity of the sealing rubber, and a second telescopic rubber ring is fixedly installed on the other side of the inner cavity of the sealing rubber. A first sealing rope is wound inside the first telescopic rubber ring, and a second sealing rope is wound inside the second telescopic rubber ring. The outer sleeve is provided with a water inlet pipe on the side of the sealing rubber, and the outer sleeve is provided with a drain pipe at the symmetrical position of the water inlet pipe. The upper end of the first sealing rope on one side of the first sliding fastener passes through the first telescopic rubber ring, wraps around the inner cavity of the first telescopic rubber ring, and penetrates the side wall of the first telescopic rubber ring from the other side to be fixedly connected to the first sliding fastener on the other side. The upper end of the second sealing rope on one side of the second sliding fastener passes through the second telescopic rubber ring, wraps around the inner cavity of the second telescopic rubber ring, and penetrates the side of the second telescopic rubber ring from the other side to be fixedly connected to the second sliding fastener on the other side. When the detection probe moves, the first sealing rope exerts a continuous pulling force on the first sliding fixing member, compressing the first return spring. When the first return spring is compressed to its minimum value, the first sliding fixing members on both sides pull the first sealing rope, causing the first telescopic rubber ring to tighten inward. At the same time as the detection probe moves, the second sealing rope exerts a continuous pulling force on the second sliding fixing member, compressing the second return spring. When the second return spring is compressed to its minimum value, the second sealing rope causes the second telescopic rubber ring to tighten inward. The detection probe has a square structure and is slidably installed inside the outer sleeve. The rotation and movement of the drive shaft will drive the detection probe to move horizontally.

[0008] Furthermore, a drive motor is fixedly mounted on one side of the mounting component, a drive wheel is fixedly mounted on one end of the drive shaft through the mounting component, and a drive belt is provided between the output end of the drive motor and the drive wheel.

[0009] By adopting the above technical solution, the mounting component can drive the transmission wheel to rotate via the transmission belt, thereby controlling the rotation of the transmission shaft and facilitating the control of the forward and backward extension of the detection probe.

[0010] Furthermore, a fixing frame is fixedly installed on one side of the mounting component, and several threaded grooves are opened on the lower side of the fixing frame. A fixing sleeve is fixedly installed on the side of the fixing frame, and the side of the fixing sleeve is fixedly connected to the outer sleeve.

[0011] By adopting the above technical solution, and by providing a threaded groove on the lower side of the fixed frame, the entire device can be installed and fixed with bolts, which facilitates the installation of the device.

[0012] Furthermore, the external air blowing pipe has an annular cavity structure, and the cleaning cylinder is fixedly installed with an air blowing mesh plate at the position of the external air blowing pipe.

[0013] By adopting the above technical solution, the cleaning cylinder can reduce the amount of foreign objects entering the interior of the cleaning cylinder from the pipe. Pure hot air can be blown onto the detection end of the detection probe through the external air blower, thereby removing dust and impurities attached to the detection end of the detection probe.

[0014] Furthermore, the sealing rubber is a ring-shaped PVC component, and the sealing rubber located at the position of the first and second telescopic rubber rings is an elastic rubber component.

[0015] By adopting the above technical solution, when the first and second telescopic rubber rings contract, they can drive the sealing rubber to seal inward, thereby forming a partition in the middle of the outer sleeve, which facilitates cleaning of the detection probe.

[0016] Furthermore, a pair of first sliding fasteners are slidably arranged on both sides of the detection probe, a first reset spring is fixedly installed between the first sliding fasteners and the detection probe, and the two ends of the first sealing rope are fixedly installed on the first sliding fasteners.

[0017] By adopting the above technical solution, when the detection probe moves, the first sliding fixing part will first compress the first return spring. After the first return spring is compressed, the first sealing rope on the side will pull the first telescopic rubber ring to lock the first telescopic rubber ring. At this time, the detection probe moves to the position of the inner air blowing pipe and the inner air return pipe, which facilitates the isolation and cleaning of the detection probe position.

[0018] Furthermore, a pair of delayed contraction frames are fixedly installed on the side of the detection probe located on the first sliding fixing member, and a second sliding fixing member is slidably arranged inside the delayed contraction frame. A second reset spring is fixedly installed between the second sliding fixing member and the delayed contraction frame.

[0019] By adopting the above technical solution, when the detection probe passes the positions of the inner air blowing pipe and the inner air return pipe, the second sliding fixing part will continuously compress the second return spring. When the second return spring is compressed to the bottom, the second sealing rope on the side of the second sliding fixing part will be stretched and contracted, and the first return spring will reach the position of the water inlet pipe and the drain pipe and be rinsed with clean water. At this time, the second telescopic rubber ring is stretched and contracted to seal the position of the water inlet pipe and the drain pipe.

[0020] Furthermore, a protective shell for the detection head is fixedly installed on the outside of the detection probe, a connecting sleeve is provided at the connection position between the outer sleeve and the fixed sleeve, and a pair of stabilizing bearings are fixedly installed at the connection between the mounting component and the transmission shaft.

[0021] By adopting the above technical solution, the protective shell of the detection head can protect the side of the detection probe when the detection probe moves back and forth.

[0022] Furthermore, one end of the water inlet pipe and the drain pipe is fixedly connected to the flushing box, and one end of the hot air pipe and the exhaust pipe is fixedly connected to the hot air box. The flushing box and the hot air box are fixedly installed on the rear side of the main control box. A main control unit is provided on the side of the main control box, and the main control box and the main control unit are electrically connected.

[0023] By adopting the above technical solution, the water inlet pipe is connected to the water outlet of the rinsing box, the drain pipe is connected to the wastewater recovery end of the rinsing box, the hot air pipe is connected to the air outlet of the hot air box, and the exhaust pipe is connected to the waste gas recovery end of the hot air box. The rinsing box can pump heated cleaning liquid into the water inlet pipe, the drain pipe can recover the waste liquid from rinsing, the hot air box can pump heated gas into the hot air pipe, and the exhaust pipe can recover the waste gas containing impurities, which facilitates subsequent treatment.

[0024] Compared with the prior art, the advantages of this invention are: 1. In this invention, by providing a structure with a drive shaft, a hot air pipe and a water inlet pipe, the detection probe can be extended and retracted. During the extension and retraction of the detection probe, the probe position is cleaned.

[0025] 2. In this invention, by setting a structure with sealing rubber, the detection probe can be quickly self-cleaned during the extension and retraction process by following the process of blowing, washing, and re-blowing for cleaning, thereby enabling rapid cleaning in a short time. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 These are two structural schematic diagrams of the overall structure of the present invention; Figure 3 This is a cross-sectional view of the fixed sleeve of the present invention; Figure 4 This is a cross-sectional view of the outer sleeve of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the image; Figure 6 This is a cross-sectional view of the mounting component of the present invention; Figure 7 This is a schematic diagram of the structure of the first sliding fastener of the present invention; Figure 8 This is a schematic diagram of the structure of the second telescopic rubber ring of the present invention; Figure 9 This is a schematic diagram of the structure of the sealing rubber of the present invention; Figure 10 This is a schematic diagram of the hollow rod of the present invention.

[0028] The following are the labels in the diagram: 1. Cleaning cylinder; 2. Outer sleeve; 3. Connecting sleeve; 4. Drain pipe; 5. Exhaust pipe; 6. Fixing sleeve; 7. Water inlet pipe; 8. Hot air pipe; 801. External blowing pipe; 802. Internal blowing pipe; 803. Internal return air pipe; 9. Fixing frame; 10. Drive motor; 11. Mounting component; 12. Transmission belt; 1201. Transmission wheel; 13. Main control unit; 14. Main control box; 15. Detection head protective shell; 16. Air blower mesh; 17. Detection probe; 18. Rinsing box; 19. Hot air box; 20. Drive shaft; 21. Stabilizing bearing; 22. First sliding fixing component; 23. Sealing rubber; 24. First telescopic rubber ring; 2401. Second telescopic rubber ring; 25. First sealing rope; 2501. Second sealing rope; 26. Delayed retraction frame; 27. First return spring; 28. Second sliding fixing component; 29. ​​Second return spring.

[0029] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figure 1 - Figure 10 As shown, the embodiment of the present invention provides: including a mounting component 11, a drive shaft 20 rotatably mounted on one side of the mounting component 11, a detection probe 17 rotatably mounted on the side of the drive shaft 20, a fixing sleeve 6 mounted on the side of the mounting component 11, an outer sleeve 2 fixedly mounted on the side of the fixing sleeve 6, a detection probe 17 slidably mounted in the middle of the inner cavity of the outer sleeve 2, the drive shaft 20 and the blower mesh plate 16 are threadedly connected, the lower end of the detection probe 17 is rotatably connected to the drive shaft 20 through a smooth circular rotation, and a cleaning cylinder 1 is fixedly mounted on one end of the outer sleeve 2; A water inlet pipe 7 is fixedly installed on one side of the inner cavity of the outer sleeve 2. A hot air pipe 8 is fixedly installed on one side of the outer sleeve 2 located on the water inlet pipe 7. A drain pipe 4 is fixedly installed on the outer sleeve 2 at a position symmetrical to the water inlet pipe 7. An exhaust pipe 5 is fixedly installed on the side of the outer sleeve 2. An external air duct 801 is fixedly installed at one end of the hot air duct 8, an internal air duct 802 is fixedly installed on the side of the hot air duct 8 near the external air duct 801, and an internal return air duct 803 is fixedly installed on the hot air duct 8 at a position symmetrical to the internal air duct 802. A sealing rubber 23 is fixedly installed in the middle of the cleaning cylinder 1. A first telescopic rubber ring 24 is fixedly installed on one side of the inner cavity of the sealing rubber 23, and a second telescopic rubber ring 2401 is fixedly installed on the other side of the inner cavity of the sealing rubber 23. A first sealing rope 25 is wound inside the first telescopic rubber ring 24, and a second sealing rope 2501 is wound inside the second telescopic rubber ring 2401. The outer sleeve 2 is provided with a water inlet pipe 7 on the side of the sealing rubber 23, and the outer sleeve 2 is provided with a drain pipe 4 at the symmetrical position of the water inlet pipe 7. The upper end of the first sealing rope 25 on the side of the first sliding fastener 22 on one side passes through the first telescopic rubber ring 24, wraps around the inner cavity of the first telescopic rubber ring 24, and penetrates the side wall of the first telescopic rubber ring 24 from the other side to be fixedly connected to the first sliding fastener 22 on the other side. The upper end of the second sealing rope 2501 on the side of the second sliding fastener 28 on one side passes through the second telescopic rubber ring 2401, wraps around the inner cavity of the second telescopic rubber ring 2401, and penetrates the side of the second telescopic rubber ring 2401 from the other side to be fixedly connected to the second sliding fastener 28 on the other side. When the detection probe 17 moves, the first sealing rope 25 will continuously pull the first sliding fixing member 22, causing the first return spring 27 to compress. When the first return spring 27 is compressed to its minimum value, the first sliding fixing members 22 on both sides will pull the first sealing rope 25 to tighten the first telescopic rubber ring 24 inward. At the same time as the detection probe 17 moves, the second sealing rope 2501 will continuously pull the second sliding fixing member 28, causing the second return spring 29 to compress. When the second return spring 29 is compressed to its minimum value, the second sealing rope 2501 will tighten the second telescopic rubber ring 2401 inward. The detection probe 17 is a square structure that is slidably installed inside the outer sleeve 2. The rotation and movement of the drive shaft 20 will drive the detection probe 17 to move horizontally. A drive motor 10 is fixedly installed on one side of the mounting component 11. One end of the transmission shaft 20 passes through the mounting component 11 and a transmission wheel 1201 is fixedly installed thereon. A transmission belt 12 is provided between the output end of the drive motor 10 and the transmission wheel 1201. The mounting component 11 can drive the transmission wheel 1201 to rotate through the transmission belt 12, thereby controlling the rotation of the transmission shaft 20 and facilitating the control of the front and rear extension of the detection probe 17. A fixing frame 9 is fixedly installed on one side of the mounting component 11. Several threaded grooves are provided on the lower side of the fixing frame 9. A fixing sleeve 6 is fixedly installed on the side of the fixing frame 9. The side of the fixing sleeve 6 is fixedly connected to the outer sleeve 2. Because the fixing frame 9 has threaded grooves on the lower side, the entire device can be installed and fixed with bolts, which facilitates the setting of the device. The external air blowing pipe 801 has an annular cavity structure. The cleaning cylinder 1 is fixedly installed with the air blowing mesh plate 16 at the position of the external air blowing pipe 801. The cleaning cylinder 1 can reduce the entry of foreign objects in the pipe into the interior of the cleaning cylinder 1. Pure hot air can be blown through the external air blowing pipe 801 to the detection end of the detection probe 17, thereby removing the dust and impurities attached to the detection end of the detection probe 17. The sealing rubber 23 is a ring-shaped PVC component. The sealing rubber 23 is an elastic rubber component located at the position of the first telescopic rubber ring 24 and the second telescopic rubber ring 2401. When the first telescopic rubber ring 24 and the second telescopic rubber ring 2401 contract, they can drive the sealing rubber 23 to seal inward, thereby forming a partition in the middle of the outer sleeve 2, which facilitates the cleaning of the detection probe 17. A pair of first sliding fixing parts 22 are slidably arranged on both sides of the detection probe 17. A first return spring 27 is fixedly installed between the first sliding fixing parts 22 and the detection probe 17. The two ends of the first sealing rope 25 are fixedly installed on the first sliding fixing parts 22. When the detection probe 17 moves, the first sliding fixing parts 22 will first compress the first return spring 27. After the first return spring 27 is compressed, the first sealing rope 25 on the side will pull the first telescopic rubber ring 24, so that the first telescopic rubber ring 24 is locked. At this time, the detection probe 17 moves to the position of the inner air blowing pipe 802 and the inner air return pipe 803, thereby facilitating the isolation and cleaning of the probe position of the detection probe 17. The detection probe 17 is fixedly installed on the side of the first sliding fastener 22 with a pair of delayed contraction frames 26. The second sliding fastener 28 is slidably arranged inside the delayed contraction frame 26. The second return spring 29 is fixedly installed between the second sliding fastener 28 and the delayed contraction frame 26. When the detection probe 17 passes the positions of the inner air blowing pipe 802 and the inner air return pipe 803, the second sliding fastener 28 will continuously compress the second return spring 29. When the second return spring 29 is compressed to the bottom, the second sealing rope 2501 on the side of the second sliding fastener 28 will be stretched and contracted. The first return spring 27 will go to the position of the water inlet pipe 7 and the drain pipe 4 and be rinsed with clean water. At this time, the second telescopic rubber ring 2401 is stretched and contracted to seal the position of the water inlet pipe 7 and the drain pipe 4. A protective shell 15 for the detection head is fixedly installed on the outside of the detection probe 17. A connecting sleeve 3 is provided at the connection position between the outer sleeve 2 and the fixed sleeve 6. A pair of stabilizing bearings 21 are fixedly installed at the connection between the mounting part 11 and the drive shaft 20, so that the protective shell 15 for the detection head can protect the side of the detection probe 17 when the detection probe 17 moves back and forth. One end of the water inlet pipe 7 and the drain pipe 4 are fixedly connected to the rinsing box 18, and one end of the hot air pipe 8 and the exhaust pipe 5 are fixedly connected to the hot air box 19. The rinsing box 18 and the hot air box 19 are fixedly installed on the rear side of the main control box 14. The main control box 14 is provided with a main control unit 13 on its side. The main control box 14 and the main control unit 13 are electrically connected. The water inlet pipe 7 is connected to the water outlet of the rinsing box 18, the drain pipe 4 is connected to the wastewater recovery end of the rinsing box 18, the hot air pipe 8 is connected to the air outlet of the hot air box 19, and the exhaust pipe 5 is connected to the waste gas recovery end of the hot air box 19. The rinsing box 18 can pump in heated cleaning liquid through the water inlet pipe 7, the drain pipe 4 can recover the rinsing waste liquid, the hot air box 19 can pump in heated gas through the hot air pipe 8, and the exhaust pipe 5 can recover the waste gas containing impurities for convenient subsequent treatment.

[0032] Working principle of the invention: This device is fixedly installed by the threaded groove at the bottom of the fixed frame 9 and the bolts. It is easy to install and has strong stability. The drive motor 10 serves as the power source. It drives the transmission wheel 1201 to rotate through the transmission belt 12, which in turn drives the transmission shaft 20 to rotate smoothly under the limit support of the stabilizing bearing 21. The transmission shaft 20 is linked with the detection probe 17, which can accurately control the front and rear extension displacement of the detection probe 17 in the inner cavity of the outer sleeve 2 to complete the switching between the working conditions of the flue extending for detection and retracting for cleaning. The detection head protective shell 15 on the outside of the detection probe 17 can protect the probe body during the displacement process to avoid bumps and wear. The cleaning cylinder 1 is equipped with an annular sealing rubber 23. Dynamic partition sealing is achieved by relying on the first telescopic rubber ring 24 and the second telescopic rubber ring 2401 in conjunction with the sealing rope. When the detection probe 17 retracts inward, the first sliding fixing part 22 on both sides of the probe compresses the first return spring 27, pulls the first sealing rope 25 to make the first telescopic rubber ring 24 contract and lock, forming a sealed isolation for the front hot air cleaning area. After the probe continues to move, the second sliding fixing part 28 inside the delayed contraction frame 26 compresses the second return spring 29, pulls the second sealing rope 2501 to make the second telescopic rubber ring 2401 contract and lock, sealing and isolating the rear water washing area. By locking the two-stage telescopic rubber rings in a timed manner, the inner cavity of the outer sleeve 2 is divided into an independent hot air cleaning chamber and a water washing cleaning chamber, avoiding backflow of flue gas and crossflow of water vapor, and ensuring independent operation of the cleaning condition. When the detection probe 17 retracts to the hot air cleaning station, the high-temperature hot air generated by the hot air box 19 is delivered to the outer blowing pipe 801 and the inner blowing pipe 802 through the hot air pipe 8. The annular outer blowing pipe 801, together with the blowing mesh plate 16, outputs uniform and pure hot air. In daily use, the probe detection end is periodically swept in a wide range of outer ring to remove loose dust and particulate matter from the surface. The inner blowing pipe 802 performs precise directional sweeping of the core sensing area of ​​the probe. Together with the exhaust pipe 5, the waste gas containing impurities is recovered to the hot air box 19 for unified treatment, achieving the initial cleaning of stubborn floating dust and flue gas attachments. The detection probe 17 continuously moves to the water washing and cleaning station, and the second telescopic rubber ring 2401 is completely locked and sealed, enclosing the area of ​​the water inlet pipe 7 and the drain pipe 4 into an independent water washing chamber. The main control box 14 controls the operation of the rinsing tank 18. The heated cleaning liquid is pumped into the chamber through the water inlet pipe 7 to thoroughly wash and rinse the probe sensing end face and slit structure, completely removing stubborn impurities that cannot be removed by hot air, such as solidified ammonium salts, viscous scale, and adhered oil. The wastewater after cleaning flows back to the rinsing tank 18 through the drain pipe 4, realizing closed-loop recycling of waste liquid with no waste liquid leakage. The cleaning process is completely sealed, requiring no equipment shutdown or disassembly. After the water washing is completed, the detection probe 17 moves back to the hot air station and restarts. The hot air cleaning system uses hot air from both internal and external ducts to perform a secondary cleaning and drying process on the probe surface, removing residual water stains and impurities washed off by water. This ensures the probe surface is dry and clean, preventing water stains from breeding dirt and affecting detection accuracy. It also prevents corrosion and aging of probe components caused by a humid environment, significantly extending the service life of the equipment. After the entire cleaning process is completed, as the detection probe 17 is reset, it is pushed out from the middle of the sealing rubber 23, extending the clean and dry detection probe 17 outward. The first reset spring 27 and the second reset spring 29 spring back to their original positions, releasing the sealing and locking state of the two-stage telescopic rubber rings, allowing the detection probe 17 to be re-inserted into the flue for online monitoring of flue gas escape and ammonia.

[0033] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A device for monitoring ammonia escape from flue gas in a thermal power plant, comprising an installation component (11), characterized in that: A drive shaft (20) is rotatably mounted on one side of the mounting component (11), a detection probe (17) is rotatably mounted on the side of the drive shaft (20), a fixed sleeve (6) is mounted on the side of the mounting component (11), an outer sleeve (2) is fixedly mounted on the side of the fixed sleeve (6), a detection probe (17) is slidably mounted in the middle of the inner cavity of the outer sleeve (2), the drive shaft (20) and the blower mesh plate (16) are threadedly connected, the lower end of the detection probe (17) is rotatably connected to the drive shaft (20) by a smooth circular rotation, and a cleaning cylinder (1) is fixedly mounted on one end of the outer sleeve (2). A water inlet pipe (7) is fixedly installed on one side of the inner cavity of the outer sleeve (2), a hot air pipe (8) is fixedly installed on one side of the outer sleeve (2) located on the water inlet pipe (7), a drain pipe (4) is fixedly installed on the outer sleeve (2) at a symmetrical position to the water inlet pipe (7), and an exhaust pipe (5) is fixedly installed on the side of the outer sleeve (2). An external air duct (801) is fixedly installed at one end of the hot air duct (8), an internal air duct (802) is fixedly installed on the side of the hot air duct (8) near the external air duct (801), and an internal return air duct (803) is fixedly installed on the hot air duct (8) at a position symmetrical to the internal air duct (802). A sealing rubber (23) is fixedly installed in the middle of the cleaning cylinder (1). A first telescopic rubber ring (24) is fixedly installed on one side of the inner cavity of the sealing rubber (23), and a second telescopic rubber ring (2401) is fixedly installed on the other side of the inner cavity of the sealing rubber (23). A first sealing rope (25) is wound inside the first telescopic rubber ring (24), and a second sealing rope (2501) is wound inside the second telescopic rubber ring (2401). The outer sleeve (2) is provided with a water inlet pipe (7) on the side of the sealing rubber (23), and the outer sleeve (2) is provided with a drain pipe (4) at the symmetrical position of the water inlet pipe (7). A pair of first sliding fasteners (22) are slidably arranged on both sides of the detection probe (17). A first return spring (27) is fixedly installed between the first sliding fasteners (22) and the detection probe (17). The two ends of the first sealing rope (25) are fixedly installed on the first sliding fasteners (22). A pair of delayed contraction frames (26) are fixedly installed on the side of the detection probe (17) located on the first sliding fasteners (22). A second sliding fastener (28) is slidably arranged inside the delayed contraction frames (26). A second return spring (29) is fixedly installed between the second sliding fasteners (28) and the delayed contraction frames (26). The upper end of the first sealing rope (25) on the side of the first sliding fastener (22) on one side passes through the first telescopic rubber ring (24), wraps around the inner cavity of the first telescopic rubber ring (24), and penetrates the side wall of the first telescopic rubber ring (24) from the other side to be fixedly connected to the first sliding fastener (22) on the other side. The upper end of the second sealing rope (2501) on the side of the second sliding fastener (28) on one side passes through the second telescopic rubber ring (2401), wraps around the inner cavity of the second telescopic rubber ring (2401), and penetrates the side of the second telescopic rubber ring (2401) from the other side to be fixedly connected to the second sliding fastener (28) on the other side. When the detection probe (17) moves, the first sealing rope (25) will continuously pull the first sliding fixing member (22) to compress the first reset spring (27). When the first reset spring (27) is compressed to the minimum value, the first sliding fixing members (22) on both sides will pull the first sealing rope (25) to tighten the first telescopic rubber ring (24) inward. At the same time as the detection probe (17) moves, the second sealing rope (2501) will continuously pull the second sliding fixing member (28) to compress the second reset spring (29). When the second reset spring (29) is compressed to the minimum value, the second sealing rope (2501) will tighten the second telescopic rubber ring (2401) inward. The detection probe (17) is a square structure that is slidably installed inside the outer sleeve (2). The rotation and movement of the drive shaft (20) will drive the detection probe (17) to move horizontally.

2. The ammonia escape monitoring device for flue gas in thermal power plants according to claim 1, characterized in that: A drive motor (10) is fixedly installed on one side of the mounting component (11), and a drive wheel (1201) is fixedly installed on one end of the drive shaft (20) through the mounting component (11). A drive belt (12) is provided between the output end of the drive motor (10) and the drive wheel (1201).

3. The ammonia escape monitoring device for flue gas in thermal power plants according to claim 2, characterized in that: A fixing frame (9) is fixedly installed on one side of the mounting component (11). Several threaded grooves are opened on the lower side of the fixing frame (9). A fixing sleeve (6) is fixedly installed on the side of the fixing frame (9). The side of the fixing sleeve (6) is fixedly connected to the outer sleeve (2).

4. The ammonia escape monitoring device for flue gas in thermal power plants according to claim 3, characterized in that: The external air blowing pipe (801) has an annular cavity structure, and the cleaning cylinder (1) is fixedly installed with an air blowing mesh plate (16) at the position of the external air blowing pipe (801).

5. The ammonia escape monitoring device for flue gas in thermal power plants according to claim 4, characterized in that: The sealing rubber (23) is a ring-shaped PVC component, and the sealing rubber (23) located at the position of the first telescopic rubber ring (24) and the second telescopic rubber ring (2401) is an elastic rubber component.

6. The ammonia escape monitoring device for flue gas in thermal power plants according to claim 5, characterized in that: The detection probe (17) is fixedly installed with a detection head protective shell (15) on the outside. A connecting sleeve (3) is provided at the connection position between the outer sleeve (2) and the fixed sleeve (6). A pair of stabilizing bearings (21) are fixedly installed at the connection between the mounting part (11) and the transmission shaft (20).

7. The ammonia escape monitoring device for flue gas in a thermal power plant according to claim 6, characterized in that: One end of the water inlet pipe (7) and the drain pipe (4) is fixedly connected to the flushing box (18), and one end of the hot air pipe (8) and the exhaust pipe (5) is fixedly connected to the hot air box (19). The flushing box (18) and the hot air box (19) are fixedly installed on the rear side of the main control box (14). The main control box (14) is provided with a main control unit (13) on its side. The main control box (14) and the main control unit (13) are electrically connected.

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