An online SCR internal urea scale removal device

Abstract

This invention relates to the field of SCR denitrification equipment technology, specifically disclosing an online SCR internal urea scale removal device. The device includes an SCR denitrification tower, a nitrogen exhaust pipe installed on the SCR denitrification tower, an annular disc frame installed inside the nitrogen exhaust pipe, an annular sleeve installed on the annular disc frame, a connecting shaft installed inside the annular sleeve, a mounting plate frame below the annular disc frame, a drive sleeve installed on one side of the mounting plate frame, a support sleeve installed on the drive sleeve, a rotating sleeve installed inside the support sleeve, a sliding sleeve installed inside the support sleeve, a drive shaft installed inside the sliding sleeve, a cleaning plate frame installed at one end of the drive shaft, and a wiping sponge installed on the cleaning plate frame. This online SCR internal urea scale removal device uses the wiping sponge to wet the scaled surface of the nitrogen exhaust pipe, and then cleans the scaled surface of the nitrogen exhaust pipe under the action of a silicone scraper, preventing the urea scale from affecting the treatment quality of the SCR denitrification tower.

Description

Technical Field

[0001] This invention relates to the field of SCR denitrification equipment technology, specifically to an online device for removing urea scale buildup inside an SCR system. Background Technology

[0002] SCR technology is currently the most widely used denitrification technology, which can effectively remove nitrogen oxides generated by denitrification towers, internal combustion engines, boilers, etc. During operation, nitrogen oxides and ammonia react under the action of surface catalysts to generate harmless nitrogen and water. Due to its instability, ammonia poses a safety risk. Therefore, the reducing agent used for denitrification has been gradually replaced by urea solution. Urea solution reacts chemically with nitrogen oxides (NOx) to convert harmful nitrogen oxides into harmless nitrogen and water vapor. Specifically, urea decomposes into ammonia and cyanic acid under high temperature conditions. Ammonia then reacts with nitrogen oxides to generate nitrogen and water vapor. This process requires the participation of SCR catalyst. The catalyst can lower the activation energy of the reaction, making the reaction easier and faster.

[0003] When an SCR denitrification tower system treats flue gas, the flue gas first enters a preheater to raise its temperature. Then, the flue gas moves along a trajectory within the tower, and a uric acid nozzle array sprays uric acid solution, which comes into uniform contact with the flue gas under the action of a mixer. Subsequently, it flows along guide vanes through a heater for further heating, and under the action of a catalyst array, nitrogen and water are generated, thus achieving denitrification. However, in actual denitrification, urea decomposes under high temperature and the action of the catalyst, producing particulate scale. This particulate scale flows with the nitrogen gas, and near the nitrogen outlet, the airflow may experience some dynamic effects, such as eddies and reduced flow velocity. These effects may cause urea scale particles to remain or deposit near the nitrogen outlet. The deposited scale can block the pipes inside the tower, and its presence can also corrode the materials of the SCR denitrification tower, reducing the equipment's durability. Therefore, we propose an online SCR internal urea scale removal device. Summary of the Invention

[0004] The purpose of this invention is to provide an online urea scale removal device for SCR (Self-Containing Cylinder) to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an online SCR internal urea scale removal device, comprising an SCR denitrification tower, a nitrogen exhaust pipe installed on the SCR denitrification tower, wherein an annular disc frame is fixedly installed inside the nitrogen exhaust pipe, and an annular sleeve is installed on the top of the annular disc frame, with one end of the annular sleeve penetrating through the inner wall of the top of the annular disc frame and extending to the bottom, the annular sleeve and the annular disc frame being rotatably connected, wherein a connecting shaft is installed inside the annular sleeve and slidably connected to its inner wall, and a mounting plate frame is provided below the annular disc frame, and the mounting plate frame and the annular disc frame are connected to the annular disc frame. Multiple telescopic shafts are connected between the annular disc frames. A drive sleeve is rotatably connected to one side of the mounting plate frame. Force-bearing plates are symmetrically installed inside the drive sleeve. One end of the connecting shaft passes through the bottom of the annular sleeve and the side wall of the mounting plate frame and extends into the drive sleeve. A circular plate frame is fixedly installed at the end of the connecting shaft inside the drive sleeve, and force-applying plates are symmetrically installed on the circular plate frame. The force-bearing plates are located on the movement trajectory of the force-applying plates. A transmission mechanism is also provided on the nitrogen exhaust pipe. The transmission mechanism is used to drive the annular sleeve to rotate within the annular disc frame.

[0006] A support sleeve is also fixedly installed on the drive sleeve, and a rotating sleeve rotatably connected to its inner wall is installed inside the support sleeve. A sliding sleeve is provided inside the support sleeve, and the sliding sleeve is slidably connected to the rotating sleeve. A drive shaft rotatably connected to its inner wall is installed inside the sliding sleeve. One end of the drive shaft is located outside the support sleeve and is equipped with a cleaning plate frame. A wiping sponge is installed on the cleaning plate frame. A delivery pipe for inputting surfactant cleaning agent is installed at the top of the annular sleeve so that the surfactant cleaning agent wets the wiping sponge through the delivery pipe. The wiping sponge wets and cleans the scale on the inner wall of the nitrogen exhaust pipe.

[0007] Preferably, the transmission mechanism includes a pneumatic motor fixedly installed on the outer wall of the nitrogen exhaust pipe, wherein the output end of the pneumatic motor passes through the outer wall of the nitrogen exhaust pipe and extends into the interior of the annular disc frame, wherein a worm gear is fixedly installed on the output end of the pneumatic motor, and a worm wheel that meshes with the worm gear is fixedly installed on the outer wall of the annular sleeve, and the pneumatic motor drives the annular sleeve to rotate on the annular disc frame by the worm gear meshing with the worm wheel.

[0008] Preferably, an electromagnetic component is fixedly installed on the inner wall of the top of the annular sleeve, and an annular magnetic plate is fixedly installed at the end of the connecting shaft away from the circular plate frame, and the annular magnetic plate is located below the electromagnetic component. The electromagnetic component generates a repulsive force on the annular magnetic plate when energized, and a spring mechanism is connected between the annular magnetic plate and the inner wall of the bottom of the annular sleeve.

[0009] Preferably, an annular force-applying magnetic plate is fixedly installed on the circular plate frame, and the annular force-applying magnetic plate is located between two force-applying plate frames. A magnetic plate frame is fixedly installed at the end of the drive shaft away from the cleaning plate frame, and the magnetic plate frame is located on the movement trajectory of the annular force-applying magnetic plate. The magnetic poles of the annular force-applying magnetic plate and the magnetic plate frame are the same.

[0010] Preferably, the sliding sleeve is fixedly installed with actuating rods near both ends, and the drive shaft is also fixed with fixed rods at both ends, and the fixed rods are located on the movement trajectory of the actuating rods.

[0011] Preferably, an installation frame is fixedly installed on the outer wall of the support sleeve, a drive gear is fixedly installed on the outer wall of the rotating sleeve, and a drive motor is fixedly installed inside the installation frame. The output end of the drive motor passes through the inner wall of the installation frame and extends into the inside of the support sleeve. A transmission gear is fixedly installed at the output end of the drive motor, and the transmission gear and the drive gear are in a meshing state.

[0012] Preferably, a silicone scraper is also provided on one side of the wiping sponge, and the silicone scraper is in contact with the wiping sponge. A drive plate frame is installed inside the cleaning plate frame and is slidably connected to its inner wall. The drive plate frame is fixedly connected to the side wall of the silicone scraper. A plurality of return springs are connected between the drive plate frame and the inner wall of the cleaning plate frame.

[0013] Preferably, a connecting sleeve is also fixedly installed on the drive plate frame, wherein a sliding shaft is symmetrically installed on the inner wall of the connecting sleeve, and an extension shaft rotatably connected to its side wall is also installed on the cleaning plate frame. One end of the extension shaft is located outside the cleaning plate frame, and the other end penetrates the inner wall of the cleaning plate frame and is located inside the connecting sleeve. Spiral grooves are symmetrically arranged on the outer wall of the extension shaft, and the sliding shaft is located inside the spiral grooves.

[0014] Preferably, a force-applying shaft is fixedly installed on the outer wall of the sliding sleeve, and a force-receiving frame is also fixedly installed at one end of the sliding shaft located outside the cleaning plate frame, with the force-receiving frame located on the movement trajectory of the force-applying shaft.

[0015] Preferably, a plurality of spring bodies are also connected between the sliding sleeve and the rotating sleeve.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention utilizes a wiping sponge to wet the scaled surface of the nitrogen exhaust pipe, and then cleans the scaled surface of the nitrogen exhaust pipe under the action of a silicone scraper. A pneumatic motor causes a worm gear to mesh with a worm wheel, and under the action of an annular sleeve, the connecting shaft drives a circular plate frame to move. Under the action of the force-applying plate frame, the force-receiving plate frame is subjected to force, driving the drive sleeve to rotate. The rotating sleeve, sliding sleeve, and drive shaft work together to cause the cleaning plate frame to move the wiping sponge to wet the scaled surface of the nitrogen exhaust pipe, facilitating effective cleaning of the scaled surface by the silicone scraper and preventing urea scale from affecting the treatment quality of the SCR denitrification tower.

[0018] This invention utilizes an electromagnetic component to apply a repulsive force to an annular magnetic plate on a connecting shaft, thereby causing the connecting shaft to apply a force to a drive sleeve through a circular plate frame. This achieves the purpose of changing the position of the wiping sponge and silicone scraper through the drive sleeve, so that the wiping sponge and silicone scraper can clean multiple areas of the nitrogen exhaust pipe.

[0019] This invention utilizes a drive motor to rotate a transmission gear. The transmission gear meshes with a drive gear, causing the rotating sleeve to rotate within a support sleeve. Under the transmission action of the sliding sleeve, the drive shaft drives the cleaning plate frame to adjust its angle accordingly, thereby facilitating the cleaning of multiple areas of the nitrogen exhaust pipe by the wiping sponge and silicone scraper. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the nitrogen exhaust pipe of the present invention;

[0022] Figure 3 This is a schematic diagram of a partially cut-away structure of the annular disc frame of the present invention;

[0023] Figure 4 This is a schematic diagram of the internal structure of the annular disk frame of the present invention;

[0024] Figure 5 This is a schematic diagram of a partial cross-section of the annular sleeve of the present invention;

[0025] Figure 6 This is a schematic diagram showing the separation of the mounting plate frame, connecting shaft, and drive sleeve structure of the present invention;

[0026] Figure 7 This is a schematic diagram showing the positional relationship between the force-applying plate and the force-receiving plate of the present invention;

[0027] Figure 8 This is a schematic diagram of the internal structure of the support sleeve of the present invention;

[0028] Figure 9 This is a schematic diagram showing the separation of the rotating sleeve, sliding sleeve, and drive shaft structure of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure between the drive shaft and the cleaning plate frame of the present invention;

[0030] Figure 11 This is a schematic diagram of one side of the cleaning plate frame structure of the present invention;

[0031] Figure 12 This is a schematic diagram of the internal structure of the cleaning plate frame of the present invention;

[0032] Figure 13 This is a schematic diagram showing the separation of the extension shaft and drive plate frame structure of the present invention.

[0033] In the diagram: 1-SCR denitrification tower; 2-Nitrogen exhaust pipe; 3-Annular disc frame; 31-Annular sleeve; 32-Connecting shaft; 321-Annular magnetic plate; 33-Circular plate frame; 331-Annular force-applying magnetic plate; 34-Force-applying plate frame; 35-Conveying pipe; 36-Worm gear; 37-Electromagnetic assembly; 38-Spring mechanism; 4-Mounting plate frame; 5-Telescopic shaft; 6-Drive sleeve; 61-Force-bearing plate frame; 62-Support sleeve; 621-Mounting frame; 622-Drive motor; 623-Transmission gear; 6 3-Rotating sleeve; 631-Driving gear; 64-Sliding sleeve; 641-Actuating rod frame; 65-Drive shaft; 651-Magnetic plate frame; 652-Fixed rod frame; 66-Force-applying shaft; 67-Spring body; 7-Transmission mechanism; 71-Pneumatic motor; 72-Worm gear; 8-Cleaning plate frame; 81-Wiping sponge; 9-Silicone scraper; 91-Drive plate frame; 92-Reset spring; 93-Connecting sleeve; 94-Sliding shaft; 95-Force-bearing frame; 10-Extension shaft; 101-Helical groove. Detailed Implementation

[0034] 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.

[0035] Please see Figure 1-13This invention provides a technical solution: an online SCR internal urea scale removal device. This invention addresses the technical problems in the background art by making corresponding improvements, including an SCR denitrification tower 1 and a nitrogen exhaust pipe 2 fixedly installed on the SCR denitrification tower 1. An annular disc frame 3 is fixedly installed inside the nitrogen exhaust pipe 2, and an annular sleeve 31 is installed on the top of the annular disc frame 3. One end of the annular sleeve 31 penetrates the inner wall of the top of the annular disc frame 3 and extends to the bottom. The annular sleeve 31 and the annular disc frame 3 are rotatably connected. A transmission mechanism 7 is also provided on the nitrogen exhaust pipe 2. The transmission mechanism 7 is used to drive the annular sleeve 31 to rotate within the annular disc frame 3. As a further limitation of this invention, the transmission mechanism 7 includes components fixedly installed on the nitrogen exhaust pipe 2. The pneumatic motor 71 is mounted on the outer wall, with its output end penetrating the outer wall of the nitrogen exhaust pipe 2 and extending into the interior of the annular disc frame 3. A worm gear 72 is fixedly installed at the output end of the pneumatic motor 71, and a worm wheel 36 that meshes with the worm gear 72 is fixedly installed on the outer wall of the annular sleeve 31. The pneumatic motor 71 drives the annular sleeve 31 to rotate on the annular disc frame 3 through the meshing of the worm gear 72 and the worm wheel 36. A delivery pipe 35 for inputting surfactant cleaning agent is installed at the top of the annular sleeve 31. The delivery pipe 35 is located on the center line of the annular sleeve 31. It should be noted that the pneumatic motor 71 mainly consists of the following parts: cylinder, blade (or piston), inlet and outlet valves, output shaft, and housing. The working principle of the pneumatic motor 71 is mainly based on the principle of gas dynamics. When compressed gas enters the pneumatic motor 71, the gas pressure acts on the piston or vane, generating a pushing force. The piston or vane begins to move under the gas pressure, thereby driving the output shaft to rotate. When the output end of the pneumatic motor 71 rotates, it drives the worm wheel 36 to rotate through the worm 72, thereby causing the annular sleeve 31 to rotate in a specific direction on the annular disc frame 3. The annular sleeve 31 has a connecting shaft 32 that is slidably connected to its inner wall. A mounting plate frame 4 is provided below the annular disc frame 3. Multiple telescopic shafts 5 are fixedly connected to the annular disc frame 3. A drive sleeve 6 is installed on one side of the mounting plate frame 4 and is rotatably connected to it. A force-bearing plate frame 61 is symmetrically installed inside the drive sleeve 6. One end of the connecting shaft 32 passes through the bottom of the annular sleeve 31 and the side wall of the mounting plate frame 4 and extends into the drive sleeve 6. A circular plate frame 33 is fixedly installed at the end of the connecting shaft 32 located inside the drive sleeve 6. A force-applying plate frame 34 is symmetrically installed on the circular plate frame 33, and the force-bearing plate frame 61 is located on the movement trajectory of the force-applying plate frame 34.

[0036] A support sleeve 62 is also fixedly installed on the drive sleeve 6, and a rotating sleeve 63 is installed inside the support sleeve 62 and rotatably connected to its inner wall. A sliding sleeve 64 is also provided inside the support sleeve 62, and the sliding sleeve 64 is slidably connected to the rotating sleeve 63. Multiple spring bodies 67 are also connected between the sliding sleeve 64 and the rotating sleeve 63. A drive shaft 65 is installed inside the sliding sleeve 64 and rotatably connected to its inner wall. One end of the drive shaft 65 is located outside the support sleeve 62 and is fitted with a cleaning plate frame 8. A cleaning plate frame 8 is mounted on... A wiping sponge 81 is provided so that a surface-active cleaning agent can be conveyed through a delivery pipe 35 to wet the wiping sponge 81. The wiping sponge 81 is used to wet and clean the scale on the inner wall of the nitrogen exhaust pipe 2. A silicone scraper 9 is also provided on one side of the wiping sponge 81, and the silicone scraper 9 is in contact with the wiping sponge 81. A drive plate frame 91 is installed inside the cleaning plate frame 8 and is slidably connected to its inner wall. The drive plate frame 91 is fixedly connected to the side wall of the silicone scraper 9. Multiple return springs 92 are connected between the drive plate frame 91 and the inner wall of the cleaning plate frame 8.

[0037] As described above, the conveying pipe 35 of the present invention can be equipped with a gas conveying pipe and a reactive cleaning agent conveying pipe. The pipe for conveying the reactive cleaning agent can deliver the surface-active cleaning agent to the wiping sponge 81, while the gas conveying pipe can deliver the gas from the outlet of the pneumatic motor 71 to the silicone scraper 9, and appropriately heat the output gas so that the heated gas flows out from the silicone scraper 9 to clean the scale. Generally speaking, the scale of urea at the outlet is mostly melamine. Melamine is usually cleaned with chemical cleaning agents, and chemical cleaning agents generally use surface-active cleaning agents, which mainly rely on their surfactant components, such as nonionic, anionic or cationic surfactants, to reduce surface tension and help remove melamine residue. These cleaning agents are usually relatively mild. Melamine can also be heated before applying the surface-active cleaning agent to facilitate the mechanical cleaning of melamine as described below.

[0038] An electromagnetic component 37 is fixedly installed on the inner wall of the top of the annular sleeve 31, and an annular magnetic plate 321 is fixedly installed on the end of the connecting shaft 32 away from the circular plate frame 33. The annular magnetic plate 321 is located below the electromagnetic component 37. When the electromagnetic component 37 is energized, it generates a repulsive force on the annular magnetic plate 321. A spring mechanism 38 is connected between the annular magnetic plate 321 and the inner wall of the bottom of the annular sleeve 31. An annular force-applying magnetic plate 331 is fixedly installed on the circular plate frame 33 and is located between two force-applying plates 34. A magnetic plate frame 651 is fixedly installed on the end of the drive shaft 65 away from the cleaning plate frame 8 and is located on the movement trajectory of the annular force-applying magnetic plate 331. The magnetic poles of the annular force-applying magnetic plate 331 and the magnetic plate frame 651 are the same.

[0039] Specifically, following the above, when it is necessary to clean the scale on the inner wall of the nitrogen exhaust pipe 2, the pneumatic motor 71 is first started. Its output end engages with the worm gear 36 through the worm 72 to drive the annular sleeve 31 to rotate on the annular disc frame 3. During the rotation of the annular sleeve 31, the connecting shaft 32, which is slidably connected to its inner wall, rotates synchronously with it. Since the circular plate frame 33 at one end of the connecting shaft 32 is inside the driving sleeve 6, and the driving sleeve 6 is rotatably connected to the mounting plate frame 4, when the connecting shaft 32 rotates, the circular plate frame 33 at its end rotates in a directional manner inside the driving sleeve 6. During the process, the two force-applying plates 34 and the annular force-applying magnetic plate 331 on the circular plate frame 33 move synchronously with it. It should be noted that the area of ​​the annular force-applying magnetic plate 331 is larger than the area of ​​the magnetic plate frame 651. During the rotation of the circular plate frame 33, the annular force-applying magnetic plate 331 moves to the corresponding position of the magnetic plate frame 651 first (at this time, the force-applying plates 34 have not yet moved to the contact position with the force-applying plate frame 61). Since the magnetic poles of the annular force-applying magnetic plate 331 and the magnetic plate frame 651 are the same, the magnetic plate frame 651 is driven by the repulsive force of the annular force-applying magnetic plate 331 to drive the drive shaft 65 to perform directional movement. Since the drive shaft 65 and the sliding sleeve... The drive shaft 65 rotates between the 64 and the rotating sleeve 63, thereby driving the sliding sleeve 64 to move in a directional manner. The sliding sleeve 64 slides within the rotating sleeve 63, and at this time, the multiple spring bodies 67 between the sliding sleeve 64 and the rotating sleeve 63 are in a compressed state. When the drive shaft 65 moves in a directional manner, the cleaning plate 8 at the end of the drive shaft 65 moves synchronously with it, so that the wiping sponge 81 on the cleaning plate 8 comes into close contact with the inner wall of the nitrogen exhaust pipe 2. Before the wiping sponge 81 comes into close contact with the inner wall of the nitrogen exhaust pipe 2, the surface-active cleaning agent can be delivered to the wiping sponge 81 through the delivery pipe 35 to keep it wet. In the lubricated state, the circular plate frame 33 continues to rotate with the connecting shaft 32. At this time, the force-applying plate frame 34 moves to the contact point with the force-receiving plate frame 61 and applies a force to the force-receiving plate frame 61, so that the drive sleeve 6 moves synchronously with the connecting shaft 32. It should be noted that if the scale is subjected to corresponding heat treatment, the rotation direction of the drive sleeve 6 needs to be limited so that the silicone scraper 9, relative to the wiping sponge 81, first corresponds to the scale surface of the nitrogen exhaust pipe 2. In the initial state, the silicone scraper 9 does not initially contact the scale surface of the nitrogen exhaust pipe 2, while the wiping sponge 81 contacts the scale surface of the nitrogen exhaust pipe 2, as shown in the attached figure. Figure 3 Appendix Figure 4 Appendix Figure 10 and attached Figure 11 As shown, specifically, if the surface-active cleaning agent of the wiping sponge 81 has just moistened the scale, and the silicone scraper 9 comes into contact with the scale at this time, it will scrape off the surface-active cleaning agent, resulting in poor cleaning effect.

[0040] Following the above, when the drive sleeve 6 moves synchronously with the connecting shaft 32, the cleaning plate frame 8 at the end of the drive shaft 65 and the wiping sponge 81 thereon come into contact with the scale surface and perform corresponding circumferential motion. The wiping sponge 81 can make multiple circumferential motions on the nitrogen exhaust pipe 2, so that the surfactant cleaning agent can fully contact the scale. After rotating multiple times, it is necessary to control the silicone scraper 9 to move outward so that the silicone scraper 9 comes into contact with the scale surface, so that the silicone scraper 9 can clean the scale that has been wetted by the surfactant cleaning agent. Specifically, the support sleeve 62 has an installation frame 621 fixedly installed on its outer wall, the rotating sleeve 63 has an active gear 631 fixedly installed on its outer wall, and the installation frame 621 has a drive motor 622 fixedly installed inside. The output end of the drive motor 622 passes through the inner wall of the installation frame 621 and extends to the support sleeve 6. Inside the 2, a transmission gear 623 is fixedly installed at the output end of the drive motor 622. The transmission gear 623 is meshed with the drive gear 631. A connecting sleeve 93 is also fixedly installed on the drive plate frame 91. A sliding shaft 94 is symmetrically installed on the inner wall of the connecting sleeve 93. An extension shaft 10 is also installed on the cleaning plate frame 8 and rotatably connected to its side wall. One end of the extension shaft 10 is located outside the cleaning plate frame 8, and the other end passes through the inner wall of the cleaning plate frame 8 and is located inside the connecting sleeve 93. A spiral groove 101 is symmetrically arranged on the outer wall of the extension shaft 10. The sliding shaft 94 is located inside the spiral groove 101. A force-applying shaft 66 is fixedly installed on the outer wall of the sliding sleeve 64. A force-bearing frame 95 is also fixedly installed at the end of the extension shaft 10 located outside the cleaning plate frame 8. The force-bearing frame 95 is located on the movement trajectory of the force-applying shaft 66.

[0041] Following the above, after the surfactant on the wiping sponge 81 has wetted the scale, the drive motor 622 starts, and its output end drives the transmission gear 623 to mesh with the drive gear 631, so that the drive gear 631 is meshed and drives the rotating sleeve 63 to rotate. Since the sliding sleeve 64 is slidably connected to the rotating sleeve 63, the sliding sleeve 64 rotates synchronously with the rotating sleeve 63, and the sliding sleeve 64 rotates at the upper limit of the drive shaft 65. During the rotation of the sliding sleeve 64, the force-applying shaft 66 on its outer wall applies a force to the force-receiving frame 95, that is, the force-receiving frame 95 is subjected to a force to drive the extension shaft 10 to rotate. During the rotation of the extension shaft 10, the spiral groove 101 on it applies a force to the sliding shaft 94, thereby connecting the sleeve 93 to the drive shaft 63. The sliding shaft 94 drives the drive plate 91 to move directionally inside the cleaning plate 8. During the movement, the cleaning plate 8 compresses multiple return springs 92, causing the silicone scraper 9 to move to the contact point with the surface of the scale. It should be noted that the sliding sleeve 64 is fixedly installed with actuating rods 641 near both ends, and the drive shaft 65 is also fixed with fixed rods 652 at both ends. The fixed rods 652 are located on the movement trajectory of the actuating rods 641. When the force-applying shaft 66 moves to the point where it applies force to the force-bearing frame 95, the actuating rods 641 contact the fixed rods 652. Then, when the sliding sleeve 64 continues to rotate, the actuating rods 641 apply force to the fixed rods 652, so that the sliding sleeve 64 drives the drive shaft 65, which is rotatably connected to it, to rotate.

[0042] Specifically, when the force-applying shaft 66 moves to the point where it applies force to the force-receiving frame 95, the silicone scraper 9 contacts the surface of the scale, the drive motor 622 stops starting, and the silicone scraper 9 moves synchronously with the cleaning plate frame 8. That is, the silicone scraper 9 cleans the surface of the scale that has been wetted by the surfactant cleaning agent. After the silicone scraper 9 rotates several times with the cleaning plate frame 8, the scale is basically accumulated on the surface of the silicone scraper 9. Some of the excessively accumulated scale may fall off the pipe wall under the action of gravity. In order to clean multiple areas of the inner wall of the nitrogen exhaust pipe 2, the present invention performs the following operations. When the drive motor 622 is started, the lever 641 applies a force to the fixed lever 652, causing the sliding sleeve 64 to drive the drive shaft 65, which is rotatably connected to it, to rotate. This, in turn, drives the cleaning plate 8 at the end of the shaft 65, the wiping sponge 81 on it, and the silicone scraper 9, etc., to rotate. That is, the angle is adjusted around the center line of the drive shaft 65. For example, if the drive shaft 65 rotates 90°, the silicone scraper 9 also rotates 90° under the action of the cleaning plate 8. The impurities on the surface of the silicone scraper 9 are then repositioned under the action of the silicone scraper 9. During the process, impurities are moved to below their original position by the silicone scraper 9. Initially, the impurities are located on the side wall of the silicone scraper 9; as the angle is adjusted, the impurities move downwards along the side wall of the silicone scraper 9. Then, the electromagnetic component 37 is energized, generating a repulsive force on the annular magnetic plate 321, causing the connecting shaft 32 to descend within the annular sleeve 31. It should be noted that the strength of the repulsive force provided by the electromagnetic component 37 to the annular magnetic plate 321 is related to the current; that is, as the current flowing through the electromagnetic component 37 increases, the strength of the repulsive force on the annular magnetic plate 321 increases, and thus… The descent height of the connecting shaft 32 can be effectively adjusted to facilitate the cleaning of debris at different heights. The circular plate frame 33 at the end of the connecting shaft 32 acts on the drive sleeve 6, causing the drive sleeve 6 and the mounting plate frame 4 (under the action of the telescopic shaft 5) to descend. At this time, the wiping sponge 81 and the silicone scraper 9 descend. After descending to a certain position, the drive motor 622 reverses, causing the wiping sponge 81 and the silicone scraper 9 to return to their initial angle, thereby removing the scale in another area. Through the structural design of this invention, urea scale can be effectively removed.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online SCR internal urea scale removal device, characterized in that, The system includes an SCR denitrification tower (1) and a nitrogen exhaust pipe (2) installed on the SCR denitrification tower (1). An annular disc frame (3) is fixedly installed inside the nitrogen exhaust pipe (2), and an annular sleeve (31) is installed on the top of the annular disc frame (3). One end of the annular sleeve (31) penetrates the inner wall of the top of the annular disc frame (3) and extends to the bottom. The annular sleeve (31) is rotatably connected to the annular disc frame (3). A connecting shaft (32) is slidably connected to the inner wall of the annular sleeve (3). A mounting plate frame (4) is provided below the annular disc frame (3), and multiple telescopic shafts (5) connect the mounting plate frame (4) to the annular disc frame (3). One side of the mounting plate frame (4)... A drive sleeve (6) is installed and rotated therewith. A force-bearing plate frame (61) is symmetrically installed inside the drive sleeve (6). One end of the connecting shaft (32) passes through the bottom of the annular sleeve (31) and the side wall of the mounting plate frame (4) and extends into the drive sleeve (6). A circular plate frame (33) is fixedly installed at one end of the connecting shaft (32) inside the drive sleeve (6), and a force-applying plate frame (34) is symmetrically installed on the circular plate frame (33). The force-bearing plate frame (61) is located on the movement trajectory of the force-applying plate frame (34). A transmission mechanism (7) is also provided on the nitrogen exhaust pipe (2). The transmission mechanism (7) is used to drive the annular sleeve (31) to rotate in the annular disc frame (3). A support sleeve (62) is also fixedly installed on the drive sleeve (6), and a rotating sleeve (63) rotatably connected to its inner wall is installed inside the support sleeve (62). A sliding sleeve (64) is provided inside the support sleeve (62), and the sliding sleeve (64) is slidably connected to the rotating sleeve (63). A drive shaft (65) rotatably connected to its inner wall is installed inside the sliding sleeve (64). One end of the drive shaft (65) is located outside the support sleeve (62) and is equipped with a cleaning plate frame (8). A wiping sponge (81) is installed on the cleaning plate frame (8). A delivery pipe (35) for inputting surfactant cleaning agent is installed at the top of the annular sleeve (31) so that the surfactant cleaning agent wets the wiping sponge (81) through the delivery pipe (35). The wiping sponge (81) wets and cleans the scale on the inner wall of the nitrogen exhaust pipe (2). The sliding sleeve (64) is fixedly installed with actuating rods (641) near both ends, and the drive shaft (65) is also fixed with fixed rods (652) at both ends, and the fixed rods (652) are located on the movement trajectory of the actuating rods (641). An installation frame (621) is fixedly installed on the outer wall of the support sleeve (62), and a drive gear (631) is fixedly installed on the outer wall of the rotating sleeve (63). A drive motor (622) is fixedly installed inside the installation frame (621). The output end of the drive motor (622) passes through the inner wall of the installation frame (621) and extends into the support sleeve (62). A transmission gear (623) is fixedly installed at the output end of the drive motor (622). The transmission gear (623) and the drive gear (631) are in a meshing state. A silicone scraper (9) is also provided on one side of the wiping sponge (81), and the silicone scraper (9) is in contact with the wiping sponge (81). A drive plate frame (91) is installed inside the cleaning plate frame (8) and is slidably connected to its inner wall. The drive plate frame (91) is fixedly connected to the side wall of the silicone scraper (9). A plurality of return springs (92) are connected between the drive plate frame (91) and the inner wall of the cleaning plate frame (8). A connecting sleeve (93) is also fixedly installed on the drive plate frame (91), wherein a sliding shaft (94) is symmetrically installed on the inner wall of the connecting sleeve (93), and an extension shaft (10) rotatably connected to its side wall is also installed on the cleaning plate frame (8). One end of the extension shaft (10) is located outside the cleaning plate frame (8), and the other end passes through the inner wall of the cleaning plate frame (8) and is located inside the connecting sleeve (93). A spiral groove (101) is symmetrically arranged on the outer wall of the extension shaft (10), and the sliding shaft (94) is located inside the spiral groove (101). The sliding sleeve (64) has a force-applying shaft (66) fixedly installed on its outer wall, and the extension shaft (10) is also fixedly installed with a force-bearing frame (95) at one end outside the cleaning plate frame (8), and the force-bearing frame (95) is located on the movement trajectory of the force-applying shaft (66).

2. The online SCR internal urea scale removal device according to claim 1, characterized in that: The transmission mechanism (7) includes a pneumatic motor (71) fixedly installed on the outer wall of the nitrogen exhaust pipe (2), wherein the output end of the pneumatic motor (71) passes through the outer wall of the nitrogen exhaust pipe (2) and extends into the interior of the annular disc frame (3), wherein a worm (72) is fixedly installed on the output end of the pneumatic motor (71), and a worm wheel (36) meshing with the worm (72) is fixedly installed on the outer wall of the annular sleeve (31), wherein the pneumatic motor (71) drives the annular sleeve (31) to rotate on the annular disc frame (3) by meshing the worm wheel (36) with the worm (72).

3. The online SCR internal urea scale removal device according to claim 2, characterized in that: An electromagnetic component (37) is fixedly installed on the inner wall of the top of the annular sleeve (31), and an annular magnetic plate (321) is fixedly installed at the end of the connecting shaft (32) away from the circular plate frame (33), and the annular magnetic plate (321) is located below the electromagnetic component (37). The electromagnetic component (37) generates a repulsive force on the annular magnetic plate (321) when energized. A spring mechanism (38) is connected between the annular magnetic plate (321) and the inner wall of the bottom of the annular sleeve (31).

4. The online SCR internal urea scale removal device according to claim 1, characterized in that: An annular force-applying magnetic plate (331) is fixedly installed on the circular plate frame (33), and the annular force-applying magnetic plate (331) is located between two force-applying plate frames (34). A magnetic plate frame (651) is fixedly installed at the end of the drive shaft (65) away from the cleaning plate frame (8), and the magnetic plate frame (651) is located on the movement trajectory of the annular force-applying magnetic plate (331). The magnetic poles of the annular force-applying magnetic plate (331) and the magnetic plate frame (651) are the same.

5. The online SCR internal urea scale removal device according to claim 4, characterized in that: Multiple spring bodies (67) are also connected between the sliding sleeve (64) and the rotating sleeve (63).

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