Heat accumulating type thermal oxidation device with self-lubricating lifting valve for large-air-volume waste gas treatment

Abstract

The invention discloses a heat accumulating type thermal oxidation device provided with a self-lubricating lifting valve and used for large-air-volume waste gas treatment, and relates to the technical field of waste gas combustion treatment. The heat accumulating type thermal oxidation device with the self-lubricating lifting valve for the large-air-volume waste gas treatment is provided with the self-lubricating lifting valve; comprising a shell, a combustion chamber located in the shell and used for combusting waste gas, a gas collection chamber communicated through an air flue, a heat storage chamber located below the combustion chamber, a heat storage material located in the heat storage chamber and used for heat storage, and a lifting valve unit connected to the air flue and used for switching the flow direction of the waste gas. A detection assembly used for detecting the friction degree between the valve rod and the valve sleeve is arranged at the position of the lifting valve unit. The pulley is fixed to the movable rod, and one side of the pulley abuts against a valve rod in the lifting valve unit; and the angle sensor is fixed at one end of the movable rod and is used for detecting the rotating angle and speed of the movable rod, and direct contact and abrasion between parts are reduced by continuously monitoring the friction force change and regularly and properly supplementing lubricating oil according to the monitoring result, so that the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of waste gas combustion treatment technology, specifically to a regenerative thermal oxidation device for treating large-volume waste gas with a self-lubricating lift valve. Background Technology

[0002] Regenerative Thermal Oxidizers (RTOs) are highly efficient organic waste gas treatment equipment. Compared with traditional catalytic combustion and direct-fired thermal oxidizers (TOs), they have the advantages of high thermal efficiency (≥95%), low operating costs, and the ability to handle large volumes of low-concentration waste gas. When the concentration is slightly higher, secondary waste heat recovery can also be performed, greatly reducing production and operating costs. Currently, RTOs typically use lift valves to switch the flow of waste gas during operation. They usually rely on mechanical bearings and intermittent lubrication. The high-frequency movement of the valve stem causes frictional heat accumulation, seal failure, and particulate matter intrusion, leading to valve body jamming and a sharp reduction in lifespan. This makes them unsuitable for handling large volumes of high-temperature and corrosive waste gas.

[0003] For example, the rotary regenerative oxidation device disclosed in CN112377931B reduces the amount of residual exhaust gas by changing the layout of the regenerative chamber and combustion chamber. However, this layout is difficult to cope with the large volume of exhaust gas treatment conditions. Furthermore, the lubrication of the lifting valve still relies on mechanical bearings and intermittent lubrication, which can easily lead to sealing failure and particulate matter intrusion, causing valve body jamming and a sudden reduction in lifespan.

[0004] Therefore, a regenerative thermal oxidation device with a self-lubricating lift valve for treating large-volume waste gas is proposed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a regenerative thermal oxidation device for treating large-volume waste gas with a self-lubricating lift valve, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a regenerative thermal oxidation device for treating large-volume exhaust gas with a self-lubricating lift valve, comprising a shell, a combustion chamber for burning exhaust gas within the shell, a gas collection chamber connected via a duct, a heat storage chamber located below the combustion chamber, heat storage material located within the heat storage chamber for heat storage, and a lift valve unit connected to the duct for switching the direction of exhaust gas flow. The lift valve unit is equipped with a detection component for detecting the degree of friction between the valve stem and the valve sleeve, and a self-lubricating component for determining a lubrication scheme based on the detection results. The detection component includes:

[0007] The mounting block abuts against the valve sleeve at one end, and a movable rod is mounted on it;

[0008] The pulley is fixed to the movable rod, and one side of it abuts against the valve stem in the lifting valve unit, rotating as the valve stem moves;

[0009] An angle sensor, fixed to one end of the movable rod, detects the rotation angle and speed of the movable rod.

[0010] Preferably, the detection assembly further includes: a sliding rod fixed to a movable rod and rotating with the movable rod; a toggle block with its sidewall abutting against the sliding rod and moving under the squeezing action of the sliding rod; and a sliding seat with its sidewall fixed to one end of the toggle block, providing support for the toggle block.

[0011] Preferably, the detection assembly further includes: a slide rail, the sidewall of which is fixed to the mounting block and the entire slide rail is slidably inserted into the slide seat to guide and limit the slide seat; a measuring plate, one end of which is fixed to the slide seat and moves with the slide seat; and a speed sensor, which is fixed to the upper side of the slide rail and located directly above the measuring plate to measure the moving speed of the measuring plate.

[0012] Preferably, the detection assembly further includes: a fixing plate, one end of which is fixed to the side wall of the mounting block and has a fixing hole on its surface; a sliding plate, one end of which is slidably inserted into the fixing plate; and a fixing block, which is fixedly installed in the sliding plate by a reset spring and is adapted to the size of the fixing hole.

[0013] Preferably, the self-lubricating assembly includes: a guide rail fixed to a fixed plate; an electromagnet one, one end of which is fixed to the top of the guide rail; an electromagnet two, which is slidably mounted on the guide rail via a support rod and magnetically engaged with the electromagnet one; and a fixing sleeve, the top of which is fixed to one end of the support rod.

[0014] Preferably, the self-lubricating assembly further includes: an atomizing nozzle, fixed in a fixed sleeve, connected to an oil pump via an oil supply pipe and a four-way connector; and an oil tank, connected to the oil pump, supplying lubricating oil to the oil pump.

[0015] Preferably, the auxiliary component includes: a mounting shaft hinged within a fixed sleeve via a torsion spring; and a scraper fixed to the mounting shaft.

[0016] Preferably, the auxiliary component further includes: a brush plate that slides against the fixed sleeve; a limiting rod that is fixed at one end to the brush plate and slides out of the fixed sleeve at the other end; a spring that is fixed at one end to the limiting rod and at the other end to the fixed sleeve, providing elastic force for the brush plate to reset; and an airbag that is fixed inside the brush plate and connected to a deformation bladder fixed to the fixed sleeve.

[0017] Preferably, the auxiliary assembly further includes: a pressure plate, the bottom of which abuts against the top of the deformation bladder; a compression rod, the side wall of which is fixed to the side wall of the pressure plate, and the other end of which abuts against the top of the scraper; and a guide rod, one end of which is fixed to the fixing sleeve, and the other end of which slides out from inside the pressure plate.

[0018] Preferably, the auxiliary component further includes: a magnet, one end of which is fixed to the side wall of the pressure plate; and an electromagnet, the bottom of which is fixed to the fixing sleeve and magnetically engaged with the magnet.

[0019] This invention provides a regenerative thermal oxidation device for treating large-volume waste gas with a self-lubricating lift valve. Compared with the prior art, it has the following advantages:

[0020] (1) The large-volume exhaust gas treatment regenerative thermal oxidation device with self-lubricating lift valve uses a regenerative thermal oxidation device (RTO) to thermally oxidize the exhaust gas, completely decompose volatile organic compounds and other harmful substances into harmless substances such as carbon dioxide and water vapor, ensure that the exhaust gas meets strict emission standards, and guide the flow of exhaust gas through the lift valve, which greatly reduces fuel consumption and improves the overall energy utilization efficiency.

[0021] (2) This regenerative thermal oxidation device for treating large-volume exhaust gas with a self-lubricating lift valve can detect problems in advance before wear or failure occurs by continuously monitoring changes in friction. Regularly and appropriately replenishing lubricating oil according to the monitoring results can effectively reduce direct contact and wear between components. Adjusting the lubrication frequency and amount according to the actual changes in friction avoids waste and potential pollution caused by over-lubrication, while also preventing mechanical damage caused by insufficient lubrication. It also reduces valve jamming caused by abnormal friction, ensuring that the lift valve can smoothly perform airflow switching tasks, maintaining the normal operation of the system, and thus extending the service life of the lift valve and other related components. The use of two detection methods with different principles to mutually verify the trend of friction changes improves the accuracy and reliability of the data, making maintenance decisions based on this data more scientific and reasonable. Long-term recording of friction data can help analyze equipment aging patterns, predict potential future problems, and provide a reference for developing more effective preventive maintenance strategies.

[0022] (3) This regenerative thermal oxidation device for treating large volume exhaust gas with a self-lubricating lift valve achieves "on-demand lubrication", significantly improving lubrication efficiency and economy. The metal friction between the valve stem and the valve sleeve is the main cause of wear, seal aging and sluggish operation. Timely replenishment of lubricating film in the early stage of wear prevents minor scratches from evolving into serious damage, effectively reducing the mechanical wear rate, extending the overall life of the valve, and reducing RTO system shutdown or switching failure caused by valve jamming or incomplete operation. Combined with the lifting action of the lift valve, "dynamic coating" is achieved, covering the entire stroke and avoiding local dry friction. At the same time, the modular design facilitates the upgrading and transformation of old RTO systems, reducing the cost of upgrading and transformation.

[0023] (4) The large-volume exhaust gas treatment regenerative thermal oxidation device with self-lubricating lifting valve has aged lubricating oil that has adsorbed dust, metal shavings and other particles to form a substance similar to "grind paste". After cleaning, lubricating oil is sprayed again to ensure that the newly sprayed lubricating oil directly acts on the clean metal surface to form a complete and efficient lubricating film, ensuring the valve action accuracy and sealing performance, and improving the airtightness and operational stability of the RTO system.

[0024] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is another perspective view of the overall structure of the present invention;

[0027] Figure 3 This is a diagram showing the internal structure of the housing of the present invention;

[0028] Figure 4 This is a cross-sectional view of the air duct structure of the present invention;

[0029] Figure 5 This is a structural diagram showing the position of the mounting base of the present invention;

[0030] Figure 6 This is a side sectional view of the housing of the present invention;

[0031] Figure 7 This is a structural diagram showing the position of the cylinder of the present invention;

[0032] Figure 8 This is a structural diagram showing the location of the oil pump of the present invention;

[0033] Figure 9 This is a structural diagram showing the position of the detection component of the present invention;

[0034] Figure 10 For the present invention Figure 9 Enlarged view of point A in the middle;

[0035] Figure 11 This is a structural diagram showing the position of the sliding plate of the present invention;

[0036] Figure 12 This is a structural diagram showing the position of the support rod in this invention;

[0037] Figure 13 This is a structural diagram showing the position of the fixing sleeve of the present invention;

[0038] Figure 14 This is a structural diagram showing the position of the electromagnet three of the present invention;

[0039] Figure 15 This is a structural diagram showing the position of the spring in this invention.

[0040] In the diagram: 1. Housing; 11. Air collection chamber; 12. Air duct; 13. Heat storage material; 2. Mounting base; 21. Cover; 22. Cylinder; 23. Valve sleeve; 24. Valve plate; 25. Fixing plate; 251. Mounting block; 26. Sliding plate; 27. Fixing block; 28. Pulley; 29. ​​Movable rod; 210. Sliding rod; 211. Angle sensor; 212. Actuating block; 213. Sliding seat; 214. Measuring plate; 215. Slide rail; 216. Speed ​​sensor; 3. Guide rail; 31. Electromagnet one; 32. Electromagnet two; 33. Support rod; 34. Fixing sleeve; 35. Scraper; 351. Mounting shaft; 36. Atomizing nozzle; 37. Oil supply pipe; 38. Four-way connector; 39. Oil pump; 310. Oil tank; 4. Brush plate; 41. Limiting rod; 42. Spring; 43. Airbag; 44. Deformation bladder; 45. Pressure plate; 451. Extrusion rod; 46. Guide rod; 47. Magnet; 48. Electromagnet three. Detailed Implementation

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0043] Please see Figures 1 to 15 The present invention provides the following technical solutions:

[0044] Example 1: A regenerative thermal oxidation device for treating large volume exhaust gas with a self-lubricating lift valve includes a housing 1, a combustion chamber for burning exhaust gas located inside the housing 1, a gas collection chamber 11 for temporarily storing exhaust gas to be treated connected through a duct 12, a heat storage chamber located below the combustion chamber, a heat storage material 13 for heat storage located in the heat storage chamber, and a lift valve unit connected to the duct 12 for switching the direction of exhaust gas flow. The lift valve unit includes: a cylinder 22 for providing switching power, a valve stem fixedly installed on the output end of the cylinder 22 for transmitting power, a valve sleeve 23 slidably sleeved outside the valve stem for improving sealing, the valve sleeve 23 fixedly installed on the duct 12, and a valve plate 24 fixedly installed on one end of the valve stem for controlling the air intake state. The lift valve unit is fixedly installed on the duct 12 through a mounting base 2, and a cover 21 is slidably placed on the mounting base 2.

[0045] In use, the exhaust gas that needs to be combusted is transported to the gas collection chamber 11 through the air duct 12. Then, according to the progress of exhaust gas treatment in the shell 1, the lifting valve is controlled to open and close, and the exhaust gas is transported from the gas collection chamber 11 to the three heat storage chambers of the shell 1 in an orderly manner. When untreated exhaust gas passes through one of the heat storage chambers and enters the combustion chamber above, the exhaust gas after thermal oxidation treatment is discharged from another heat storage chamber, and the last heat storage chamber is purged and cleaned.

[0046] Heat is stored in the heat storage material 13 in the heat storage chamber, so that the exhaust gas is preheated by the heat storage material 13 in the heat storage chamber before entering the combustion chamber. After being preheated, the exhaust gas is more likely to reach the combustion temperature after entering the combustion chamber, which is more energy-efficient. During the operation of the lifting valve, the valve stem is driven to move by the cylinder 22, which in turn drives the valve plate 24 to move to open or close. The valve stem is supported and limited by the valve sleeve 23 to ensure sealing.

[0047] Example 2, the technical solution of which differs from Example 1 is as follows: a detection component for detecting the degree of friction between the valve stem and the valve sleeve 23 is provided at the lifting valve unit. The detection component includes: a fixed plate 25, a mounting block 251, a sliding plate 26, a fixed block 27, a pulley 28, a movable rod 29, and an angle sensor 211.

[0048] One end of the mounting block 251 slides against the valve sleeve 23, and a movable rod 29 is movably mounted in the mounting block 251 via a bearing. One end of the fixing plate 25 is fixedly mounted on the side wall of the mounting block 251, and a fixing hole is provided on the surface of the fixing plate 25. One end of the sliding plate 26 slides through the fixing plate 25, and a handle is fixedly mounted on the sliding plate 26. A return spring is fixedly mounted on the side wall of the fixing block 27, and the other end of the return spring is fixedly mounted in the sliding plate 26. The fixing block 27 and the fixing hole are matched in size. The pulley 28 is fixedly mounted on the movable rod 29, and one side of the pulley 28 slides against the valve stem in the lift valve unit. The pulley 28 can rotate with the movement of the valve stem. One end of the angle sensor 211 is fixedly mounted on one end of the movable rod 29. The angle sensor 211 is used to detect the rotation angle and speed of the movable rod 29, providing a basis for determining the injection timing and injection quantity.

[0049] The detection assembly also includes: a sliding rod 210, a toggle block 212, a sliding seat 213, a measuring plate 214, a slide rail 215, and a speed sensor 216;

[0050] One end of the sliding rod 210 is fixedly installed on the movable rod 29. The sliding rod 210 can rotate with the movable rod 29. The side wall of the actuating block 212 abuts against the sliding rod 210. The actuating block 212 can move under the squeezing of the sliding rod 210. The side wall of the sliding seat 213 is fixedly connected to one end of the actuating block 212. The sliding seat 213 provides support for the actuating block 212. The side wall of the slide rail 215 is fixedly installed on the mounting block 251. The slide rail 215 slides through the sliding seat 213. The slide rail 215 can guide and limit the sliding seat 213. One end of the measuring plate 214 is fixedly installed on the sliding seat 213. The measuring plate 214 can move with the sliding seat 213. One end of the speed sensor 216 is fixedly installed on the upper side of the slide rail 215. The speed sensor 216 is located directly above the measuring plate 214. The speed sensor 216 is used to measure the moving speed of the measuring plate 214 to assist in judging the timing and amount of fuel injection.

[0051] In use, by placing the fixing plate 25 over the valve sleeve 23, with the mounting block 251 also pressing against the valve sleeve 23, the sliding plate 26 is moved, causing it to slide out from one end of the fixing plate 25 and insert into the other end. Under the action of the return spring, the fixing block 27 pops out from the sliding plate 26 and engages with the fixing hole on the surface of the fixing plate 25, thereby allowing the fixing plate 25 to remain in place. Figure 9 The location shown;

[0052] Furthermore, a mounting groove can be opened on the surface of the valve sleeve 23, which is compatible with the mounting block 251, so that the mounting block 251 can be inserted into the mounting groove a short distance, and the mounting block 251 can be better fixed in this position.

[0053] The mounting block 251 provides support for the movable rod 29, which in turn provides support for the pulley 28. The pulley 28 slides against the valve stem, and the contact surface between the pulley 28 and the valve stem is concave from both sides to fit the curvature of the valve stem. To ensure the friction between the two, a raised strip can be provided on the surface of the pulley 28.

[0054] After the detection component is installed on the valve sleeve 23, during the opening and closing of the lifting valve, the valve stem slides inside the valve sleeve 23. While the two rub against each other, the pulley 28 also rubs against the valve stem. Under the action of friction, the pulley 28 rotates with the extension and retraction of the valve stem. The rotation of the pulley 28 drives the movable rod 29 to rotate, and the rotation of the movable rod 29 drives the angle sensor 211 to rotate. The angle sensor 211 measures the rotation speed and angle of the movable rod. The speed and the size of the rotation angle are used to determine whether the degree of friction between the valve stem and the valve sleeve 23 is within the normal range.

[0055] If the rotation speed is slow and the angle is small, it indicates that there is more lubricating oil on the valve stem surface and less friction between the pulley 28 and the valve stem. Therefore, it can be judged that the friction between the valve stem and the valve sleeve 23 is also small. If the rotation speed is fast and the angle is large, it indicates that there is less lubricating oil on the valve stem surface and more friction between the pulley 28 and the valve stem. Therefore, it can be judged that the friction between the valve stem and the valve sleeve 23 is also large. If the rotation speed is slow and the angle is large, it indicates that there is an appropriate amount of lubricating oil on the valve stem surface and moderate friction between the pulley 28 and the valve stem. Therefore, it can be judged that the friction between the valve stem and the valve sleeve 23 is also moderate.

[0056] Furthermore, several sliding rods 210 are installed on the movable rod 29. The rotation of the movable rod 29 drives the sliding rods 210 to rotate synchronously. When the sliding rods 210 rotate, they push the actuating block 212 to move. The actuating block 212 drives the sliding seat 213 to move. The sliding seat 213 slides with the slide rail 215, so that the sliding seat 213 can only move up and down in a straight line along the slide rail 215. When the sliding seat 213 moves, it drives the measuring plate 214 to move synchronously. When one of the sliding rods 210 separates from the actuating block 212, the actuating block 212 falls back under the combined action of its own weight, the weight of the sliding seat 213 and the weight of the measuring plate 214. The speed of the measuring plate 214 is measured by the speed sensor 216 installed on the side wall of the slide rail 215, thereby helping to judge the friction between the valve stem and the valve sleeve 23. A wire spring can also be installed between the sliding seat 213 and the slide rail 215 so that the sliding seat 213 can obtain a stable return spring force.

[0057] By comparing the moving speed results of the measuring plate 214 measured in two consecutive measurements, if the measured speed increases, it indicates that the rotation speed of the movable rod 29 is constantly increasing, indicating that the friction between the valve stem and the pulley 28 is increasing, thus indicating that the friction between the valve stem and the valve sleeve 23 is also increasing. If the measured speed decreases, it indicates that the rotation speed of the movable rod 29 is constantly decreasing, indicating that the friction between the valve stem and the pulley 28 is decreasing, thus indicating that the friction between the valve stem and the valve sleeve 23 is also decreasing. If the measured speeds are similar, it indicates that the rotation speed of the movable rod 29 is uniform, and the friction between the pulley 28 and the valve stem is moderate, thus indicating that the friction between the valve stem and the valve sleeve 23 is also moderate.

[0058] Example 3, the technical solution that differs from Example 2 includes: a self-lubricating component is provided at the lift valve unit for determining the lubrication scheme based on the test results. The self-lubricating component includes: guide rail 3, electromagnet 1 31, electromagnet 2 32, support rod 33, fixing sleeve 34, atomizing nozzle 36, oil supply pipe 37, four-way connector 38, oil pump 39, and oil tank 310.

[0059] One end of the guide rail 3 is fixedly mounted on the fixed plate 25. One end of electromagnet 31 is fixedly mounted on the top of the guide rail 3. One end of electromagnet 32 ​​is fixedly mounted on the top of the support rod 33. One end of the support rod 33 is slidably mounted on the guide rail 3. Electromagnet 32 ​​and electromagnet 31 are magnetically coupled. The magnetic switching between electromagnet 32 ​​and electromagnet 31 drives the support rod 33 to slide back and forth along the guide rail 3. The top of the fixing sleeve 34 is fixedly mounted on one end of the support rod 33. The fixing sleeve 34 is composed of two halves, which can be fixed together by welding, bolts, etc. The side wall of the atomizing nozzle 36 is fixedly mounted inside the fixing sleeve 34. The oil inlet of the atomizing nozzle 36 is connected to an oil supply pipe 37. One end of the oil supply pipe 37 is connected to a four-way connector 38. One end of the four-way connector 38 is connected to the output end of the oil pump 39. The oil tank 310 is connected to the oil inlet of the oil pump 39. The oil tank 310 can supply lubricating oil to the oil pump 39.

[0060] The self-lubricating assembly also includes auxiliary components for spreading lubricating oil evenly. The auxiliary components include: mounting shaft 351, scraper 35, brush 4, limit rod 41, spring 42, airbag 43, deformation bladder 44, pressure plate 45, extrusion rod 451, guide rod 46, magnet 47, and electromagnet 48.

[0061] One end of the mounting shaft 351 is hinged to the fixed sleeve 34 via a torsion spring. The scraper 35 is fixedly mounted on the mounting shaft 351. The side wall of the brush plate 4 slides against the fixed sleeve 34. One end of the limiting rod 41 is fixedly mounted on the brush plate 4, and the other end of the limiting rod 41 slides out from the fixed sleeve 34. One end of the spring 42 is fixedly mounted on the limiting rod 41, and the other end of the spring 42 is fixedly mounted on the fixed sleeve 34. The spring 42 is used to provide elastic force for the brush plate 4 to reset. One end of the airbag 43 is fixedly mounted inside the brush plate 4 and connected to the deformation bladder 44. One end of the bladder 44 is fixedly installed on the fixed sleeve 34. The bottom of the pressure plate 45 abuts against the top of the deformable bladder 44. The side wall of the extrusion rod 451 is fixedly installed on the side wall of the pressure plate 45. The other end of the extrusion rod 451 slides against the top of the scraper 35. One end of the guide rod 46 is fixedly installed on the fixed sleeve 34. The other end of the guide rod 46 slides out from inside the pressure plate 45. One end of the magnet 47 is fixedly installed on the side wall of the pressure plate 45. The bottom of the electromagnet 3 48 is fixedly installed on the fixed sleeve 34, and the electromagnet 3 48 and the magnet 47 are magnetically engaged.

[0062] In use, after the detection component completes the friction detection, the oil pump 39 is started according to the detection result. The oil pump 39 delivers the lubricating oil in the oil tank 310 to the atomizing nozzle 36 through the four-way 38 and the oil supply pipe 37 and sprays it onto the surface of the valve stem. When the lubricating oil is sprayed, the valve stem extends and retracts normally. At the same time as the lubricating oil is sprayed, the magnetic field between electromagnet 1 31 and electromagnet 2 32 is switched back and forth between attraction and repulsion by the control console. This causes electromagnet 2 32 to drive the support rod 33 to move under the combined action of magnetic attraction and repulsion. Through the sliding cooperation between the support rod 33 and the guide rail 3, it can only slide along the guide rail 3 when moving.

[0063] At the same time, the magnetism between electromagnet 48 and magnet 47 switches to mutual attraction, causing magnet 47 to drive pressure plate 45 to move. Pressure plate 45 slides with guide rod 46, so that pressure plate 45 can only move in a straight line along guide rod 46. Pressure plate 45 squeezes deformation bladder 44, so that the gas in deformation bladder 44 is transported to air bladder 43. After air bladder 43 expands, it drives brush plate 4 to move towards the side where valve stem is located, so that brush plate 4 can contact valve stem.

[0064] The support rod 33 drives the fixed sleeve 34 to move, the fixed sleeve 34 drives the limiting rod 41 to move, and the limiting rod 41 drives the brush plate 4 to move, thereby making the brush plate 4 spread the lubricating oil sprayed from the atomizing nozzle 36 evenly. After spreading, the magnetism between the electromagnet 38 and the magnet 47 is switched to mutual repulsion and reset. Figure 14 As shown in the initial state, the spring 42 provides a restoring force to the limiting rod 41, causing the brush plate 4 to return to the side where the fixed sleeve 34 is located, and the gas in the compressed airbag 43 flows back into the deformation bag 44, waiting for the next use;

[0065] After long-term operation, before spraying lubricating oil, the magnetism between electromagnet 348 and magnet 47 is switched to attraction, so that pressure plate 45 drives extrusion rod 451 to move. Extrusion rod 451 pushes scraper 35 to rotate around mounting shaft 351, so that scraper 35 and brush 4 can contact valve stem. Then, the magnetism between electromagnet 131 and electromagnet 232 is controlled to switch back and forth between attraction and repulsion, so that brush 4 and scraper 35 can remove lubricating oil with particulate matter adhering to the surface of valve stem. Then, lubricating oil is sprayed out, and the scraped lubricating oil can enter the combustion chamber for burning under the drive of exhaust gas flow.

[0066] In summary, the technical solutions disclosed in the above embodiments of the present invention have at least the following advantages:

[0067] By continuously monitoring changes in friction, problems can be detected before wear or failure occurs.

[0068] Regular and appropriate replenishment of lubricating oil based on monitoring results can effectively reduce direct contact and wear between components;

[0069] Adjusting the lubrication frequency and amount according to the actual frictional changes avoids waste and potential pollution caused by over-lubrication, while also preventing mechanical damage caused by insufficient lubrication.

[0070] To reduce valve jamming caused by abnormal friction, ensure that the lift valve can smoothly perform airflow switching tasks, maintain normal system operation, and thus extend the service life of the lift valve and other related components;

[0071] By using two detection methods based on different principles to cross-reference the changing trend of friction, the accuracy and reliability of the data are improved, making maintenance decisions based on this data more scientific and reasonable.

[0072] Long-term recording of friction data can help analyze equipment aging patterns, predict potential future problems, and provide a reference for developing more effective preventive maintenance strategies.

[0073] Achieving "on-demand lubrication" significantly improves lubrication efficiency and economy;

[0074] Metal-to-metal friction between the valve stem and valve sleeve is the main cause of wear, seal aging, and sluggish operation. Timely replenishment of lubricating film in the early stage of wear can prevent minor scratches from developing into serious damage, effectively reduce the rate of mechanical wear, and extend the overall life of the valve.

[0075] Reduce RTO system shutdowns or switching failures caused by valve jamming or incomplete operation by combining the lifting and lowering action of the lift valve;

[0076] It achieves "dynamic coating" to cover the entire process, avoiding local dry grinding. At the same time, the modular design facilitates the upgrading and transformation of old RTO systems, reducing the cost of upgrading and transformation.

[0077] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0078] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0079] Parallelism: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism. It allows for situations where the parallelism is not absolute due to factors such as assembly tolerance, design tolerance, and structural flatness. It also allows for errors within a small angular range, such as within 10 degrees of assembly error. These can all be considered as parallel relationships.

[0080] Perpendicularity: The perpendicularity defined in this application is not limited to an absolute perpendicular intersection (with an included angle of 90 degrees). It is permissible for non-absolute perpendicular intersections caused by factors such as assembly tolerances, design tolerances, and structural flatness. It is permissible for errors within a small angular range, such as an assembly error range of 80 to 100 degrees, which can all be understood as a perpendicular relationship.

[0081] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A regenerative thermal oxidation device for treating large volume exhaust gas with a self-lubricating lift valve, comprising a shell (1), a combustion chamber for burning exhaust gas located within the shell (1), a gas collection chamber (11) connected via a duct (12), a heat storage chamber located below the combustion chamber, a heat storage material (13) located within the heat storage chamber for heat storage, and a lift valve unit connected to the duct (12) for switching the direction of exhaust gas flow, characterized in that: The lifting valve unit is equipped with a detection component for detecting the degree of friction between the valve stem and the valve sleeve (23) and a self-lubricating component for determining the lubrication scheme based on the detection results. The detection component includes: The mounting block (251) abuts against the valve sleeve (23) at one end, and a movable rod (29) is mounted on it; The pulley (28) is fixed on the movable rod (29) and one side abuts against the valve stem in the lifting valve unit, rotating as the valve stem moves; An angle sensor (211) is fixed to one end of the movable rod (29) to detect the rotation angle and speed of the movable rod (29).

2. The regenerative thermal oxidation device for treating large-volume waste gas with a self-lubricating lift valve according to claim 1, characterized in that, The detection component also includes: The sliding rod (210) is fixed on the movable rod (29) and rotates with the movable rod (29); The actuating block (212) has its side wall abutting against the sliding rod (210) and moves under the squeezing action of the sliding rod (210); The sliding seat (213) has its side wall fixed to one end of the actuating block (212), providing support for the actuating block (212).

3. The regenerative thermal oxidation device for treating large-volume waste gas with a self-lubricating lift valve according to claim 2, characterized in that, The detection component also includes: The slide rail (215) is fixed on the mounting block (251) and slides through the slide seat (213) to guide and limit the slide seat (213); The measuring plate (214) is fixed at one end to the sliding seat (213) and moves with the sliding seat (213); A speed sensor (216) is fixed on the upper side of the slide rail (215) and directly above the measuring plate (214) to measure the moving speed of the measuring plate (214).

4. The regenerative thermal oxidation device for treating large-volume waste gas with a self-lubricating lift valve according to claim 1, characterized in that, The detection component also includes: The fixing plate (25) is fixed at one end to the side wall of the mounting block (251), and a fixing hole is provided on its surface; The sliding plate (26) is slidably inserted into the fixed plate (25) at one end; The fixing block (27) is fixedly installed in the sliding plate (26) by a reset spring, and its size is adapted to the fixing hole.

5. The regenerative thermal oxidation device for treating large-volume waste gas with a self-lubricating lift valve according to claim 4, characterized in that, The self-lubricating component includes: The guide rail (3) is fixed on the fixing plate (25); Electromagnet 1 (31), one end of which is fixed to the top of the guide rail (3); Electromagnet 2 (32) is slidably mounted on guide rail (3) via support rod (33) and magnetically engaged with electromagnet 1 (31); The top of the fixed sleeve (34) is fixed to one end of the support rod (33).

6. The regenerative thermal oxidation device for treating large-volume waste gas with a self-lubricating lift valve according to claim 5, characterized in that, The self-lubricating component also includes: The atomizing nozzle (36) is fixed inside the fixing sleeve (34) and connected to the oil pump (39) through the oil supply pipe (37) and the four-way connector (38); The oil tank (310) is connected to the oil pump (39) to supply lubricating oil to the oil pump (39).

7. The regenerative thermal oxidation device for treating large-volume waste gas with a self-lubricating lift valve according to claim 5, characterized in that, The self-lubricating assembly further includes an auxiliary component for spreading the lubricating oil evenly, the auxiliary component comprising: The mounting shaft (351) is hinged to the fixed sleeve (34) by a torsion spring; The scraper (35) is fixed on the mounting shaft (351).

8. The regenerative thermal oxidation device for treating large-volume waste gas with a self-lubricating lift valve according to claim 7, characterized in that, The auxiliary components also include: The brush plate (4) slides against the fixed sleeve (34); The limiting rod (41) is fixed at one end to the brush plate (4) and the other end slides out from the fixing sleeve (34); A spring (42) is fixed at one end to a limiting rod (41) and at the other end to a fixing sleeve (34) to provide elastic force for the brush plate (4) to reset; An airbag (43) is fixed inside a brush plate (4) and connected to a deformation bladder (44) fixed on a fixing sleeve (34).

9. The regenerative thermal oxidation device for treating large-volume waste gas with a self-lubricating lift valve according to claim 8, characterized in that, The auxiliary components also include: The pressure plate (45) abuts against the top of the deformation bladder (44) at its bottom; The extrusion rod (451) has its side wall fixed to the side wall of the pressure plate (45), and its other end abuts against the top of the scraper (35); The guide rod (46) is fixed at one end to the fixed sleeve (34) and slides out from the pressure plate (45) at the other end.

10. The regenerative thermal oxidation device for treating large-volume waste gas with a self-lubricating lift valve according to claim 9, characterized in that, The auxiliary components also include: A magnet (47) is fixed at one end to the side wall of the pressure plate (45); Electromagnet three (48) is fixed at the bottom on the fixed sleeve (34) and magnetically engaged with the magnet (47).

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