Device for detecting permeability of anticorrosive coating on inner wall of biomass boiler at high temperature and high pressure

Abstract

The invention provides a biomass boiler inner wall anticorrosive coating permeability detection device under high temperature and high pressure, and relates to the technical field of material permeability detection.The biomass boiler inner wall anticorrosive coating permeability detection device comprises a tank body, an air supply pipe communicated with the interior of the tank body is fixedly connected to the side wall of the tank body, and a round pipe communicated with the interior of the tank body is fixedly connected to the top of the tank body; a switching air supply unit is mounted at the lower part of the tank body, and a penetration detection unit and a sealing unit are mounted on the tank body; the switching air supply unit comprises a reversing component and an air supply component; by means of alternate reversing circulation of gas, high-temperature gas is prevented from being gathered in a certain area all the time, the gas in the tank body can be mixed more sufficiently, the temperature in the whole tank body tends to be consistent, the temperature of corrosive gas in the tank body is more uniform, the temperature of corrosive gas making contact with an anti-corrosion coating is more consistent, and the corrosion resistance of the anti-corrosion coating is improved. The motion state of the medium in the boiler is simulated by enabling the corrosive gas to flow dynamically.

Description

Technical Field

[0001] This invention relates to the technical field of material permeability testing, and more particularly to a device for testing the permeability of anti-corrosion coatings on the inner wall of biomass boilers under high temperature and high pressure. Background Technology

[0002] Biomass boilers, as key equipment for heat energy conversion using biomass fuel, are widely used in industrial heating, power generation, and other fields. However, the flue gas produced during biomass combustion often contains corrosive components such as chlorine and sulfur, which can easily corrode the inner wall of the boiler under high temperature and high pressure, seriously affecting the equipment's lifespan and operational safety. Therefore, it is usually necessary to coat the inner wall with an anti-corrosion coating to isolate the corrosive medium. The anti-permeability performance of the coating directly determines the durability and reliability of its protective effect. Therefore, in the research and development of this new type of anti-corrosion coating for the inner wall of biomass boilers, it is necessary to test the gas permeability of the anti-corrosion coating under simulated actual working conditions (high temperature, high pressure, corrosive atmosphere), which is an important step in evaluating coating performance and optimizing material selection and process parameters.

[0003] Currently, most existing anti-corrosion coating permeability testing devices are based on static gas environment conditions. However, in actual use, the testing of anti-corrosion coating permeability often requires a long time, which places high demands on the temperature stability of corrosive gases during the testing process. Unstable temperatures will directly affect the accuracy and reliability of the test results. In addition, in actual use, biomass boilers have a large dynamic flow of corrosive gases inside. If static gas environment conditions are used, the gas flow is small, making it difficult to truly simulate the dynamic working conditions of high temperature, high pressure and medium flow inside biomass boilers. Such devices usually have problems with uneven temperature distribution and poor gas flow. Therefore, it is necessary to provide a high-temperature and high-pressure biomass boiler inner wall anti-corrosion coating permeability testing device to solve the above technical problems. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure.

[0005] This invention provides a device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure. The device includes a tank, with an air supply pipe fixedly connected to its side wall and communicating with its interior. A circular pipe connected to its interior is fixedly connected to the top of the tank. A switching air supply unit is installed at the bottom of the tank. A permeability detection unit and a sealing unit are installed on the tank. The switching air supply unit includes a reversing component and an air supply component. The reversing component includes a switching channel fixedly connected to the bottom of the tank. One end of the tank is connected to a first main pipe, and the other end is connected to a second main pipe. The bottom end of the first main pipe is connected to a first upper branch pipe and a first lower branch pipe. The bottom end of the second main pipe is connected to a second upper branch pipe and a second lower branch pipe. One end of the first upper branch pipe is connected to the upper part of one side of the switching channel. One end of the first lower branch pipe is connected to the lower part of one side of the switching channel. One end of the second upper branch pipe is connected to the upper part of the other side of the switching channel. One end of the second lower branch pipe is connected to the lower part of the other side of the switching channel. An upper turntable is rotatably connected to the upper inner side of the switching channel. An upper long air vent is opened on one side of the upper turntable. A lower turntable is rotatably connected to the lower inner side of the switching channel.

[0006] Preferably, the lower turntable has a lower long vent on one side, the upper turntable has an upper round opening at the bottom that communicates with the upper long vent, and the lower turntable has a lower round opening at the top that communicates with the lower long vent.

[0007] Preferably, the air supply component includes a vertical shaft, which is rotatably mounted within a switching channel. A toothed groove is formed on the inner side of both the upper and lower circular openings. Two sets of transmission components are installed within the switching channel. Each transmission component includes a main gear, which is fixedly sleeved on the outer side of the vertical shaft. A fixing strip is fixedly connected to the inner wall of the switching channel, and a driven gear is rotatably connected to one end of the fixing strip. The driven gear meshes with the main gear, and the toothed groove meshes with the driven gear. Fan blades are fixedly sleeved on the outer side of the vertical shaft. Several heating tubes are evenly installed in the middle of the inner side of the switching channel. A motor is fixedly installed at the bottom of the switching channel. A lower turntable is rotatably sleeved on the outer side of the vertical shaft. The vertical shaft is rotatably connected to the bottom of the switching channel, and the bottom end of the vertical shaft passes through the switching channel and is fixedly connected to the rotating end of the motor.

[0008] Preferably, the permeation detection unit includes a measuring component, a driving component, and a material mounting component; the measuring component includes a cylinder, one end of which is fixedly connected to a sealing gasket, and a connecting lug is fixedly connected to the lower part of one end of the cylinder. A horizontal shaft is fixedly connected transversely through the connecting lug, and two connecting strips are symmetrically fixedly connected to both ends of the horizontal shaft. An eccentric column is fixedly connected to one end of each connecting strip. A pressure gauge for detecting the internal air pressure is installed on the cylinder, and the horizontal shaft is rotatably connected to one side of the circular tube.

[0009] Preferably, a support ring is provided on the inner side of the circular tube, and the support ring is integrally formed with the circular tube.

[0010] Preferably, the driving component includes an electric cylinder, and a movable frame is fixedly connected to the telescopic end of the electric cylinder. A first horizontal guide groove, a second horizontal guide groove, and an oblique guide groove are transversely opened on both sides of the movable frame. One end of the second horizontal guide groove is connected to the bottom end of the oblique guide groove. The first horizontal guide groove and the second horizontal guide groove are arranged parallel to each other. The eccentric column is slidably disposed in the oblique guide groove. The second horizontal guide groove and the oblique guide groove are both adapted to the eccentric column.

[0011] Preferably, the material mounting component includes a mounting plate, the inner side of which is sealed and fixedly connected to a circular plate. The circular plate has several vertical through holes evenly and longitudinally extending through it. A lifting handle is fixedly connected to the top of the circular plate. The inner side of the mounting plate at the bottom of the circular plate is coated with an anti-corrosion coating. The lower diameter of the mounting plate is smaller than the upper diameter. The mounting plate is supported by a support ring. The top surface of the mounting plate is at the same horizontal height as the top surface of the circular tube.

[0012] Preferably, the sealing unit includes a sealing component and a guiding component. The sealing component includes a housing, which is sleeved on the outside of the circular tube and fixedly connected to the tank. A valve plate is slidably and sealingly disposed on the inner side of the housing. The valve plate extends transversely through the circular tube and has a through hole extending longitudinally through it. A transverse sliding rod is slidably connected to the housing. One end of the transverse sliding rod is fixedly connected to one side of the valve plate, and the other end of the transverse sliding rod extends out of the housing and is fixedly connected to a transverse fixed shaft. Guide wheels are rotatably connected to both ends of the transverse fixed shaft. The guide wheels are disposed in a first horizontal guide groove, which is adapted to the guide wheels. The electric cylinder is fixedly connected to the top of the housing.

[0013] Preferably, the guide component includes a horizontal sliding column, one end of which is fixedly connected to the outer wall of the circular tube, and the other end of the horizontal sliding rod is laterally slidably sleeved on the outside of the horizontal sliding column. A spring is sleeved on the outside of the horizontal sliding rod, one end of which is fixedly connected to the rod wall of the horizontal sliding rod, and the other end of which is fixedly connected to the outer wall of the circular tube.

[0014] Preferably, the sidewalls of the upper and lower turntables are sealed and fitted to the inner sidewall of the switching channel, and the diameters of the upper and lower turntables are equal.

[0015] Compared with related technologies, the device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure provided by the present invention has the following beneficial effects: In this invention, the main gear is driven by a vertical shaft to rotate, thereby rotating the upper and lower turntables. This allows the upper long vent to switch with the first and second upper branch pipes, and the lower long vent to switch with the first and second lower branch pipes. This enables alternating flow of gas through the first main pipe and into the second main pipe, or vice versa, achieving alternating gas flow. This prevents high-temperature gas from accumulating in one area, allowing for more thorough mixing of the gas within the tank and a more uniform temperature throughout the tank. This results in a more uniform temperature of the corrosive gas within the tank, and a more consistent temperature of the corrosive gas in contact with the anti-corrosion coating. Furthermore, in the switching gas supply unit, the heating pipe of the air supply component heats the circulating gas, and the fan blades are driven by a motor to rotate via the vertical shaft, accelerating gas flow and maintaining a uniform temperature within the tank. This ensures the stability of the high-temperature and high-pressure environment. By dynamically flowing the corrosive gas, the movement of the medium within a boiler is simulated, which is closer to the actual operating environment than static gas, resulting in greater overall stability and reliability, and improving the accuracy of the detection.

[0016] The electric cylinder of the drive unit moves the moving frame, and drives the eccentric column through the inclined guide groove, so that the horizontal axis drives the cylinder of the measuring component to rotate. With the help of the sealing gasket, a tight seal is achieved between the cylinder and the contact surface of the round tube and the mounting plate, ensuring that the corrosive gas can only penetrate through the anti-corrosion coating and enter the cylinder through the vertical hole, thus ensuring the accuracy of the measurement.

[0017] The valve plate of the closed unit initially seals the circular tube. The first horizontal guide groove of the moving frame drives the guide wheel, which in turn drives the valve plate to move through the horizontal slide bar, so that the through hole is aligned with the circular tube, thereby realizing the contact switching between the gas inside the tank and the coating.

[0018] After the test is completed, the spring of the guide component drives the valve plate to reset, and the horizontal slide column ensures the valve plate moves stably, so there is no need for manual operation. When the extension end of the drive electric cylinder retracts, the action of closing the cylinder first and then opening the valve plate can be realized, realizing the linkage of operation and making operation more convenient.

[0019] In the material mounting component of the present invention, the mounting plate is supported by a support ring inside the round tube, and the material mounting component can be easily put in and taken out by the lifting handle, which facilitates operation. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structure of the high-temperature and high-pressure biomass boiler inner wall anti-corrosion coating permeability testing device provided by the present invention; Figure 2 This is another perspective view of the device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure in this invention; Figure 3This is a cross-sectional view of the device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure in this invention. Figure 4 This is a cross-sectional view of the air supply unit switching location in this invention; Figure 5 This is a schematic diagram of the structure of the upper turntable in this invention; Figure 6 This is a schematic diagram of the structure of the lower turntable in this invention; Figure 7 This is a schematic diagram of the structure of the mounting disk in this invention; Figure 8 This is a schematic diagram of the structure of the movable frame in this invention; Figure 9 This is a schematic diagram of the valve plate structure in this invention; Figure 10 This is a schematic diagram of the structure of the measuring component in this invention; Figure 11 This is a schematic diagram of the structure of the material mounting component in this invention; Figure 12 This is a schematic diagram of the structure of the closed component in this invention.

[0021] Numbered components in the diagram: 1. Tank; 2. Gas supply pipe; 3. Circular pipe; 301. Support ring; 4. Switching gas supply unit; 5. Permeation detection unit; 6. Sealing unit; 41. Reversing component; 411. Switching channel; 412. First main pipe; 4121. First upper branch pipe; 4122. First lower branch pipe; 413. Second main pipe; 4131. Second upper branch pipe; 4132. Second lower branch pipe; 414. Upper turntable; 4141. Upper circular opening; 415. Upper long vent; 416. Lower turntable; 4161. Lower circular opening; 417. Lower long vent; 42. Air supply component; 421. Vertical shaft; 422. Motor; 423. Fan blade; 424. Main gear; 425. Driven gear; 426. Fixing strip; 427. Heating tube; 428. Gear 51. Groove; 511. Measuring component; 512. Cylinder; 513. Connecting lug; 514. Horizontal shaft; 515. Sealing gasket; 516. Pressure gauge; 517. Connecting strip; 518. Eccentric column; 52. Drive component; 521. Electric cylinder; 522. Moving frame; 5221. First horizontal guide groove; 5222. Second horizontal guide groove; 5223. Inclined guide groove; 53. Material mounting component; 531. Mounting plate; 5311. Circular plate; 532. Vertical through hole; 533. Anti-corrosion coating; 534. Lifting handle; 61. Sealing component; 611. Housing; 612. Valve plate; 613. Through hole; 614. Horizontal slide bar; 615. Horizontal fixed shaft; 616. Guide wheel; 62. Guide component; 621. Horizontal slide column; 622. Spring. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0023] Please refer to the following: Figures 1 to 6 A device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and pressure includes a tank 1. An air supply pipe 2, communicating with the interior of the tank 1, is fixedly connected to the side wall of the tank 1. A valve is installed on the air supply pipe 2. A pressure gauge, communicating with the interior of the tank 1, is installed outside the tank 1. A temperature sensor is also installed inside the tank 1. A circular pipe 3, communicating with the interior of the tank 1, is fixedly connected to the top of the tank 1. A switching air supply unit 4 is installed at the bottom of the tank 1. A permeability detection unit 5 and a sealing unit 6 are installed on the tank 1. Several sets of the circular pipe 3, the permeability detection unit 5, and the sealing unit 6 can be arranged on the tank 1. Setting several sets as needed allows for better comparison of permeability detection results. The switching air supply unit 4 includes a reversing component 41 and an air supply component 42. The reversing component 41 includes a switching channel 411, which has an "I"-shaped cross-section and is hollow inside. The switching channel 411 is fixedly connected to the bottom of the tank 1. One end of the tank 1 is connected to a first main pipe 412, and the other end of the tank 1 is connected to a second main pipe 413. The bottom end of the first main pipe 412 is connected to a first upper branch pipe 4121 and a first lower branch pipe 4122. The bottom end of the second main pipe 413 is connected to a second upper branch pipe 4131 and a second lower branch pipe 4132. One end of the first upper branch pipe 4121 is connected to the upper part of one side of the switching channel 411, one end of the first lower branch pipe 4122 is connected to the lower part of one side of the switching channel 411, one end of the second upper branch pipe 4131 is connected to the upper part of the other side of the switching channel 411, and one end of the second lower branch pipe 4132 is connected to the switching channel 411. The lower part of the other side of the channel 411 is connected, and the upper part of the inner side of the switching channel 411 is rotatably connected to the upper turntable 414. An upper long vent 415 is opened on one side of the upper turntable 414, and a lower turntable 416 is rotatably connected to the lower part of the inner side of the switching channel 411. A lower long vent 417 is opened on one side of the lower turntable 416. An upper round opening 4141 communicating with the upper long vent 415 is opened at the bottom of the upper turntable 414, and a lower round opening 4161 communicating with the lower long vent 417 is opened at the top of the lower turntable 416.

[0024] In the above, tank 1 provides a space to contain corrosive gases under high temperature and pressure. Gas supply pipe 2 is used to transport corrosive gases into tank 1. The valve on gas supply pipe 2 can control the on / off of gas supply. Pressure gauge and temperature sensor monitor the pressure and temperature inside tank 1 in real time to ensure that the detection environment meets the preset conditions. Circular pipe 3 provides a channel for gas permeation detection and connects tank 1 with permeation detection unit 5. The switching channel 411 of reversing component 41 has an "I" shaped cross-section design, which provides installation space for upper turntable 414 and lower turntable 416, and facilitates the flow of gas between different branch pipes. The first main pipe 412, the second main pipe 413 and their branch pipes, the first upper branch pipe 4121, the first lower branch pipe 4122, the second upper branch pipe 4131 and the second lower branch pipe 4132, constitute the gas circulation path. The upper long air port 415 and the lower long air port 417 realize the connection and switching with different branch pipes through the rotation of upper turntable 414 and lower turntable 416, laying the foundation for the alternating flow of gas.

[0025] Furthermore, the air supply component 42 includes a vertical shaft 421, which is rotatably mounted within the switching channel 411. A ring of toothed grooves 428 is formed on the inner sides of both the upper circular opening 4141 and the lower circular opening 4161. Two sets of transmission components are installed within the switching channel 411. Each transmission component includes a main gear 424, which is fixedly sleeved on the outer side of the vertical shaft 421. A fixing strip 426 is fixedly connected to the inner wall of the switching channel 411, and a driven gear 425 is rotatably connected to one end of the fixing strip 426. The driven gear 425 is in contact with the main gear 424. The gear 428 meshes with the driven gear 425. A fan blade 423 is fixedly sleeved on the outer side of the vertical shaft 421. Several heating tubes 427 are evenly installed in the middle of the inner side of the switching channel 411. A motor 422 is fixedly installed at the bottom of the switching channel 411. The lower turntable 416 is rotatably sleeved on the outer side of the vertical shaft 421. The lower turntable 416 and the vertical shaft 421 are rotatably connected. The vertical shaft 421 is rotatably connected to the bottom of the switching channel 411. The bottom end of the vertical shaft 421 passes through the switching channel 411 and is fixedly connected to the rotating end of the motor 422.

[0026] In the above, the motor 422 of the air supply component 42 drives the vertical shaft 421 to rotate. On the one hand, it drives the fan blade 423 to rotate, accelerating the gas flow in the switching channel 411 and enhancing the gas circulation efficiency in the tank 1. On the other hand, through the meshing transmission of the main gear 424 and the driven gear 425, and the cooperation of the driven gear 425 and the tooth groove 428, it drives the upper turntable 414 and the lower turntable 416 to rotate synchronously, realizing the automatic switching of gas flow direction. The heating tube 427 can heat the gas in circulation, maintain the corrosive gas in the tank 1 at a stable temperature, and avoid large temperature fluctuations affecting the test results. The fixing strip 426 provides stable support for the driven gear 425.

[0027] Furthermore, a support ring 301 is provided on the inner side of the circular tube 3, and the support ring 301 is integrally formed with the circular tube 3.

[0028] In the above, the support ring 301 on the inner side of the round tube 3 is integrally set with the round tube 3, which not only enhances the structural strength, but also provides precise support for the mounting plate 531 of the material mounting component 53, ensuring that the mounting plate 531 is stable in position during the testing process.

[0029] Furthermore, the sidewalls of the upper turntable 414 and the lower turntable 416 are sealed and fitted to the inner sidewall of the switching channel 411. To improve the sealing performance, a high-temperature and corrosion-resistant sealing ring can be nested on the outside of the upper turntable 414 and the lower turntable 416 to improve the sealing performance. The upper turntable 414 and the lower turntable 416 have the same diameter, and the upper long vent 415 and the lower long vent 417 have the same size and opposite orientation, with a specific angle of 180°.

[0030] In the above, the sidewalls of the upper turntable 414 and the lower turntable 416 are sealed and fitted with the inner sidewall of the switching channel 411. With the help of high temperature and corrosion resistant sealing rings, gas leakage can be effectively prevented during the flow process, ensuring the pressure inside the tank 1 is stable. The upper turntable 414 and the lower turntable 416 have the same diameter, and the upper long vent 415 and the lower long vent 417 have the same size and opposite orientation (angle of 180°). This ensures that the two can synchronously achieve the reverse switching of gas flow direction when rotating, avoiding airflow conflict, improving the smoothness and stability of the switching, and thus ensuring uniform gas mixing inside the tank 1. Example

[0031] For further details, please refer to [link / reference]. Figures 1 to 11 Based on Embodiment 1, the permeation detection unit 5 includes a measuring component 51, a driving component 52, and a material mounting component 53. The measuring component 51 includes a cylinder 511, with a sealing gasket 514 fixedly connected to one end of the cylinder 511. A connecting lug 512 is fixedly connected to the lower part of one end of the cylinder 511. A horizontal shaft 513 is fixedly connected through the connecting lug 512. Two connecting strips 516 are symmetrically fixedly connected to both ends of the horizontal shaft 513. An eccentric column 517 is fixedly connected to one end of each connecting strip 516. A pressure gauge 515 for detecting the internal air pressure is installed on the cylinder 511. The horizontal shaft 513 is rotatably connected to one side of the circular tube 3. Pressure relief valves are installed on both the tank 1 and the cylinder 511.

[0032] In the above-mentioned permeation detection unit 5, the measuring component 51 has a cylinder 511 as a collection chamber for permeated gas. When the cylinder 511 is closed, the sealing gasket 514 at one end can tightly fit the round tube 3 and the mounting plate 531 to ensure the cavity is sealed and prevent external gas interference or internal permeated gas leakage. The connecting lug 512, the horizontal shaft 513, the connecting strip 516 and the eccentric column 517 constitute a transmission structure, which allows the cylinder 511 to rotate around the horizontal shaft 513 to realize the opening and closing action. The pressure gauge 515 monitors the gas pressure change inside the cylinder 511 in real time, providing data for calculating the gas permeation rate.

[0033] Furthermore, the drive component 52 includes an electric cylinder 521, and a movable frame 522 is fixedly connected to the telescopic end of the electric cylinder 521. The movable frame 522 has a first horizontal guide groove 5221, a second horizontal guide groove 5222, and an oblique guide groove 5223 that are transversely opened on both sides. One end of the second horizontal guide groove 5222 is connected to the bottom end of the oblique guide groove 5223. The first horizontal guide groove 5221 and the second horizontal guide groove 5222 are arranged parallel to each other. The eccentric column 517 is slidably arranged in the oblique guide groove 5223. The second horizontal guide groove 5222 and the oblique guide groove 5223 are both adapted to the eccentric column 517.

[0034] In the above, the electric cylinder 521 of the drive component 52 provides power for the opening and closing of the cylinder 511 and the movement of the valve plate 612. The first horizontal guide groove 5221, the second horizontal guide groove 5222, and the inclined guide groove 5223 on the moving frame 522 respectively cooperate with the guide wheel 616 and the eccentric column 517. The extension and retraction of the electric cylinder 521 drives the moving frame 522 to move, so that the eccentric column 517 moves in the inclined guide groove 5223, driving the cylinder 511 to rotate to achieve sealing and closing. Then the eccentric column 517 enters the second horizontal guide groove 5222 to maintain the sealed state of the cylinder 511. At the same time, the first horizontal guide groove 5221 drives the valve plate 612 to move to achieve on / off switching. All actions are linked in an orderly manner, improving the degree of automation of operation.

[0035] Furthermore, the material installation component 53 includes an installation plate 531, which is disposed inside the circular tube 3 and fits against the inner wall of the circular tube 3. A circular plate 5311 is sealed and fixedly connected to the inner side of the installation plate 531. Several vertical through holes 532 are evenly and longitudinally opened on the circular plate 5311. A lifting handle 534 is fixedly connected to the top of the circular plate 5311. An anti-corrosion coating 533 is coated on the inner side of the installation plate 531 at the bottom of the circular plate 5311. The anti-corrosion coating 533 completely fills and covers the bottom of the circular plate 5311, including the vertical through holes 532. The lower diameter of the installation plate 531 is smaller than the upper diameter. The installation plate 531 is supported by a support ring 301. The top surface of the installation plate 531 is at the same horizontal level as the top surface of the circular tube 3.

[0036] In the above, the lower diameter of the mounting plate 531 of the material mounting component 53 is smaller than the upper diameter, which makes it easy to place inside the circular tube 3 and stably supported by the support ring 301. The circular plate 5311 is sealed and fixed to the mounting plate 531. The lifting handle 534 on the top facilitates the removal and placement of the mounting plate 531 and makes it easy to replace different anti-corrosion coating 533 samples. The vertical through hole 532 provides a flow channel for the gas that has permeated through the anti-corrosion coating 533, allowing it to enter the cylinder 511. The anti-corrosion coating 533 is coated on the bottom of the circular plate 5311 and can directly contact the corrosive gas inside the tank 1, simulating the actual working environment of the inner wall coating of the biomass furnace. Example

[0037] For further details, please refer to [link / reference]. Figures 1 to 12 Based on Embodiment 2, the sealing unit 6 includes a sealing component 61 and a guiding component 62. The sealing component 61 includes a housing 611, which is sleeved on the outside of the circular tube 3 and fixedly connected to the tank body 1. A valve plate 612 is slidably and sealingly arranged on the inner side of the housing 611. The valve plate 612 extends laterally through the circular tube 3 and has a through hole 613 extending longitudinally through it. The diameter of the through hole 613 is equal to the inner diameter of the circular tube 3. A horizontal sliding rod 614 is slidably connected to the housing 611. One end of the horizontal sliding rod 614 is fixedly connected to one side of the valve plate 612. The other end of the horizontal sliding rod 614 extends out of the housing 611 and is fixedly connected to a horizontal fixed shaft 615. Guide wheels 616 are rotatably connected to both ends of the horizontal fixed shaft 615. The guide wheels 616 are arranged in a first horizontal guide groove 5221, which is adapted to the guide wheels 616. An electric cylinder 521 is fixedly connected to the top of the housing 611.

[0038] In the above, in the sealing component 61 of the sealing unit 6, the housing 611 provides sliding space for the valve plate 612 and is fixed to the tank 1 to ensure structural stability. The valve plate 612 can slide in a sealed manner within the housing 611. Its through hole 613 is equal to the inner diameter of the round tube 3. When the through hole 613 is aligned with the round tube 3, the gas in the tank 1 can contact the anti-corrosion coating 533. Otherwise, the contact is blocked, realizing the switching of the detection state. The horizontal slide bar 614, the horizontal fixed shaft 615 and the guide wheel 616 constitute a transmission structure, which, together with the first horizontal guide groove 5221 of the moving frame 522, drives the valve plate 612 to move. The electric cylinder 521 is fixed on the top of the housing 611 to ensure stable power transmission.

[0039] Furthermore, the guide component 62 includes a horizontal sliding column 621, one end of which is fixedly connected to the outer wall of the circular tube 3, and the other end of the horizontal sliding rod 614 is laterally slidably sleeved on the outside of the horizontal sliding column 621. A spring 622 is sleeved on the outside of the horizontal sliding rod 614, one end of which is fixedly connected to the rod wall of the horizontal sliding rod 614, and the other end of which is fixedly connected to the outer wall of the circular tube 3.

[0040] In the above, the horizontal sliding column 621 of the guide component 62 guides the movement of the horizontal sliding rod 614, ensuring that the valve plate 612 slides smoothly. The spring 622 is sleeved on the outside of the horizontal sliding rod 614. After the test is completed, the horizontal sliding rod 614 can be pushed to reset the valve plate 612 through elastic reset, so as to realize the automatic sealing of the round tube 3 without manual operation, thus improving the convenience and reliability of the device.

[0041] Furthermore, a temperature sensor installed inside the tank 1 is used to monitor the temperature inside the tank 1 in real time, and a pressure gauge installed on the tank 1 is used to monitor the pressure inside the tank 1 in real time and transmit the data signal to the external control system. The temperature sensor, motor 422, heating tube 427 and electric cylinder 521 are all electrically connected to the external control system through wires.

[0042] In the above, the temperature sensor, motor 422, heating tube 427 and electric cylinder 521 are electrically connected to the external control system, and the electrical control of these components can be realized through the control system.

[0043] Furthermore, the tank body 1, gas supply pipe 2, circular pipe 3, switching channel 411, first main pipe 412, first upper branch pipe 4121, first lower branch pipe 4122, second main pipe 413, second upper branch pipe 4131 and second lower branch pipe 4132 are preferably made of 316L stainless steel or Hastelloy alloy. The mounting plate 531 and circular plate 5311 can be made of 316L stainless steel. Other parts that come into contact with corrosive gases, such as valve plate 612 and inner wall of shell 611, are made of high-temperature and corrosion-resistant materials. The upper turntable 414 and lower turntable 416 can be made of special ceramics such as alumina ceramic materials. The sealing gasket 514 can be made of flexible graphite or polytetrafluoroethylene (PTFE) materials. The heating tube 427 can be made of high-temperature and corrosion-resistant nickel-based alloy heating tube.

[0044] The working principle of the device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure provided by this invention is as follows: In use, connect the gas supply pipe 2 to the external high-temperature and high-pressure gas supply system, open the valve on the gas supply pipe 2 to deliver the corrosive gas into the tank 1, then close the valve on the gas supply pipe 2 and start the motor 422. The motor 422 drives the vertical shaft 421 to rotate, and the vertical shaft 421 drives the fan blade 423 to rotate. The rotation of the fan blade 423 accelerates the flow speed of the gas. At the same time, the rotation of the vertical shaft 421 drives the driven gear 425 to rotate. The driven gear 425 drives the tooth groove 428 to make the upper turntable 414 and the lower long air port 417 rotate.

[0045] When the upper long vent 415 corresponds to the second upper branch pipe 4131, the upper turntable 414 keeps the first upper branch pipe 4121 blocked. At this time, the lower long vent 417 corresponds to the first lower branch pipe 4122, and the lower turntable 416 keeps the second lower branch pipe 4132 blocked. Under the action of the fan blade 423, the gas in the tank 1 enters the first lower branch pipe 4122 through the first main pipe 412, and enters the switching channel 411 through the lower long vent 417 and the lower round opening 4161. The corrosive gas entering the switching channel 411 is heated by the heating pipe 427. The heated corrosive gas then enters the second upper branch pipe 4131 through the upper round opening 4141 and the upper long vent 415, and then enters the second main pipe 413 before flowing back into the tank 1. During this process, the corrosive gas in the tank 1 is circulated by flowing out through the first main pipe 412 and then flowing in through the second main pipe 413.

[0046] After the upper turntable 414 and the lower turntable 416 rotate for a period of time, the upper long vent 415 switches to correspond with the first upper branch pipe 4121, and at the same time, the lower long vent 417 switches to correspond with the second lower branch pipe 4132. At this time, the corrosive gas in the tank 1 enters the second lower branch pipe 4132 through the second main pipe 413, and enters the switching channel 411 through the lower long vent 417 and the lower round opening 4161. It is heated by the heating pipe 427, and the heated corrosive gas then enters the first upper branch pipe 4121 through the upper round opening 4141 and the upper long vent 415, and then flows into the tank 1 through the first main pipe 412. During this process, the corrosive gas in the tank 1 is circulated by flowing out through the second main pipe 413 and then flowing in through the first main pipe 412.

[0047] After the temperature of the corrosive gas inside the tank 1 reaches the required detection temperature, the material mounting component 53 is installed inside the circular tube 3. The mounting plate 531 is supported by the support ring 301. After installation, the top surface of the mounting plate 531 is flush with the top surface of the circular tube 3. Then, the electric cylinder 521 is activated. The telescopic end of the electric cylinder 521 retracts, driving the moving frame 522 to move closer to the circular tube 3. The moving frame 522 drives the first horizontal guide groove 5221, the second horizontal guide groove 5222, and the inclined guide groove 5223 to move synchronously. Under the guidance of the inclined guide groove 5223, the eccentric column is driven. When 517 moves, the eccentric column 517 drives the connecting bar 516 to rotate the horizontal shaft 513. The horizontal shaft 513 drives the connecting ear 512 to rotate the cylinder 511, causing the cylinder 511 to rotate from a horizontal state to a vertical state. At this time, one end of the cylinder 511 is pressed against the top of the round tube 3, and the sealing gasket 514 is pressed against the top surface of the round tube 3 and the mounting plate 531. The sealing gasket 514 undergoes elastic deformation under pressure, ensuring a high-temperature and high-pressure seal between the cylinder 511 and the round tube 3 and the mounting plate 531, thereby improving the sealing performance between the contact surfaces of the cylinder 511 and the round tube 3 and the mounting plate 531.

[0048] When the moving frame 522 moves, causing the eccentric column 517 to enter the second horizontal guide groove 5222 from the top of the inclined guide groove 5223, the connecting bar 516 is adjusted from a vertical state to a horizontal state. The horizontal shaft 513 remains in its current position and no longer rotates. The cylinder 511 tightly covers the round tube 3. During the movement of the eccentric column 517 within the inclined guide groove 5223, the guide wheel 616 moves within the first horizontal guide groove 5221. The guide wheel 616 gradually approaches the other end of the first horizontal guide groove 5221 under the compression support of the spring 622. During this process, the horizontal fixed shaft 615 remains stationary, and the valve plate 612 keeps the round tube 3 sealed. The corrosive gas inside the tank 1 does not contact the anti-corrosion coating 533. The cylinder 511 remains tightly covered by the round tube 3. With the electric cylinder 52... As the telescopic end of 1 continues to retract, the guide wheel 616 aligns with the other end of the first horizontal guide groove 5221 and abuts against the moving frame 522. At this time, the movement of the moving frame 522 pushes the guide wheel 616 to move the horizontal fixed shaft 615. The horizontal fixed shaft 615 drives the horizontal sliding rod 614 to move the valve plate 612 within the housing 611. The spring 622 is elastically compressed until the valve plate 612 moves so that the through hole 613 is aligned with the round tube 3. At this time, the corrosive gas in the tank 1 can come into contact with the anti-corrosion coating 533. The gas that has permeated through the anti-corrosion coating 533 enters the cylinder 511 through the vertical through hole 532. Since the inside and outside of the cylinder 511 are completely sealed at this time, as the amount of gas permeating into the cylinder 511 increases, the pressure value of the pressure gauge 515 on the cylinder 511 increases. The pressure gauge 515 monitors the pressure change inside the cylinder 511 in real time, records the pressure-time curve, calculates the gas permeation rate, and evaluates the coating performance.

[0049] After the test, open the pressure relief valves on cylinder 511 and tank 1 to release the internal gas and recover the released gas. Then, control the extension and retraction of electric cylinder 521 to reset the moving frame 522 and release the elastic potential energy of spring 622, causing valve plate 612 to reset and seal the lower part of round tube 3 again, preparing for the next test. Then, remove the material installation component 53 by holding the lifting handle 534. The operator can perform microstructure analysis such as SEM or chemical composition analysis such as EDS on the removed anti-corrosion coating 533 to further verify the permeation behavior.

[0050] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure, comprising a tank (1), characterized in that, The side wall of the tank (1) is fixedly connected to the gas supply pipe (2) communicating with its interior, the top of the tank (1) is fixedly connected to the round pipe (3) communicating with its interior, the lower part of the tank (1) is equipped with a switching gas supply unit (4), and the tank (1) is equipped with a permeation detection unit (5) and a sealing unit (6). The switching air supply unit (4) includes a reversing component (41) and an air supply component (42); the reversing component (41) includes a switching channel (411), the switching channel (411) is fixedly connected to the bottom of the tank (1), one end of the tank (1) is connected to a first main pipe (412), the other end of the tank (1) is connected to a second main pipe (413), the bottom end of the first main pipe (412) is connected to a first upper branch pipe (4121) and a first lower branch pipe (4122), the bottom end of the second main pipe (413) is connected to a second upper branch pipe (4131) and a second lower branch pipe (4132), the first upper branch pipe (4121) is connected to a second lower branch pipe (4132), the first upper branch pipe (4121) is connected to a second lower branch pipe (4132), the first upper branch pipe (4121) is connected to a second lower branch pipe (4132), the first upper branch pipe (4121) is connected to a second lower branch pipe (4132), the first upper branch pipe (4121) is connected to a second lower branch pipe (4132), the first lower branch pipe (4121) is connected to a second upper branch pipe (4122), the first lower ... lower branch pipe (4121) is connected to a second lower branch pipe (4132), the first lower branch pipe (4121) is connected to a second lower branch pipe (4132), the first lower branch pipe (4121) is connected to a second lower branch pipe (4132), the One end of the first lower branch pipe (4122) is connected to the upper part of one side of the switching channel (411), one end of the second upper branch pipe (4131) is connected to the upper part of the other side of the switching channel (411), one end of the second lower branch pipe (4132) is connected to the lower part of the other side of the switching channel (411), an upper turntable (414) is rotatably connected to the upper part of the inner side of the switching channel (411), an upper long air vent (415) is opened on one side of the upper turntable (414), and a lower turntable (416) is rotatably connected to the lower part of the inner side of the switching channel (411).

2. The device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure as described in claim 1, characterized in that, The lower turntable (416) has a lower long vent (417) on one side, the upper turntable (414) has an upper round opening (4141) at the bottom that communicates with the upper long vent (415), and the lower turntable (416) has a lower round opening (4161) at the top that communicates with the lower long vent (417).

3. The device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure as described in claim 2, characterized in that, The air supply component (42) includes a vertical shaft (421), which is rotatably mounted in the switching channel (411). A toothed groove (428) is formed on the inner side of both the upper circular opening (4141) and the lower circular opening (4161). Two sets of transmission components are provided within the switching channel (411). Each transmission component includes a main gear (424), which is fixedly sleeved on the outer side of the vertical shaft (421). A fixing strip (426) is fixedly connected to the inner wall of the switching channel (411). One end of the fixing strip (426) is rotatably connected to a driven gear (425). The gear (428) meshes with the main gear (424), the tooth groove (428) meshes with the driven gear (425), the fan blade (423) is fixedly sleeved on the outer side of the vertical shaft (421), a number of heating tubes (427) are evenly installed in the middle of the inner side of the switching channel (411), the motor (422) is fixedly installed at the bottom of the switching channel (411), the lower turntable (416) is rotatably sleeved on the outer side of the vertical shaft (421), the vertical shaft (421) is rotatably connected to the bottom of the switching channel (411), and the bottom end of the vertical shaft (421) passes through the switching channel (411) and is fixedly connected to the rotating end of the motor (422).

4. The device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure as described in claim 3, characterized in that, The permeation detection unit (5) includes a measuring component (51), a driving component (52), and a material mounting component (53); the measuring component (51) includes a cylinder (511), one end of which is fixedly connected to a sealing gasket (514), and a connecting lug (512) is fixedly connected to the lower part of one end of the cylinder (511). A horizontal shaft (513) is fixedly connected through the connecting lug (512), and two connecting strips (516) are symmetrically fixedly connected to both ends of the horizontal shaft (513). An eccentric column (517) is fixedly connected to one end of the connecting strip (516). A pressure gauge (515) for detecting the internal air pressure is installed on the cylinder (511), and the horizontal shaft (513) is rotatably connected to one side of the round tube (3).

5. The device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure as described in claim 4, characterized in that, The inner side of the circular tube (3) is provided with a support ring (301), and the support ring (301) and the circular tube (3) are integrally formed.

6. The device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure as described in claim 5, characterized in that, The driving component (52) includes an electric cylinder (521). The telescopic end of the electric cylinder (521) is fixedly connected to a movable frame (522). The movable frame (522) has a first horizontal guide groove (5221), a second horizontal guide groove (5222), and an oblique guide groove (5223) that are horizontally extended on both sides. One end of the second horizontal guide groove (5222) is connected to the bottom end of the oblique guide groove (5223). The first horizontal guide groove (5221) and the second horizontal guide groove (5222) are arranged in parallel. The eccentric column (517) is slidably arranged in the oblique guide groove (5223). The second horizontal guide groove (5222) and the oblique guide groove (5223) are both adapted to the eccentric column (517).

7. The device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure as described in claim 6, characterized in that, The material installation component (53) includes an installation plate (531). A circular plate (5311) is sealed and fixedly connected to the inner side of the installation plate (531). Several vertical through holes (532) are evenly and longitudinally opened on the circular plate (5311). A lifting handle (534) is fixedly connected to the top of the circular plate (5311). The inner side of the installation plate (531) at the bottom of the circular plate (5311) is coated with an anti-corrosion coating (533). The lower diameter of the installation plate (531) is smaller than the upper diameter. The installation plate (531) is supported by a support ring (301). The top surface of the installation plate (531) is at the same horizontal height as the top surface of the circular tube (3).

8. The device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure as described in claim 7, characterized in that, The sealing unit (6) includes a sealing component (61) and a guiding component (62). The sealing component (61) includes a housing (611), which is sleeved on the outside of the circular tube (3) and fixedly connected to the tank body (1). A valve plate (612) is slidably and sealingly arranged on the inner side of the housing (611). The valve plate (612) extends laterally through the circular tube (3), and a through hole (613) is longitudinally provided on the valve plate (612). A horizontal sliding rod (614) is slidably connected to the housing (611) through the transverse passage. One end of the horizontal slide bar (614) is fixedly connected to one side of the valve plate (612), and the other end of the horizontal slide bar (614) extends out of the housing (611) and is fixedly connected to a horizontal fixed shaft (615). Both ends of the horizontal fixed shaft (615) are rotatably connected to guide wheels (616). The guide wheels (616) are set in the first horizontal guide groove (5221). The first horizontal guide groove (5221) is adapted to the guide wheels (616). The electric cylinder (521) is fixedly connected to the top of the housing (611).

9. The device for detecting the permeability of the anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure as described in claim 8, characterized in that, The guide component (62) includes a horizontal sliding column (621), one end of which is fixedly connected to the outer wall of the round tube (3), and the other end of the horizontal sliding rod (614) is slidably sleeved on the outside of the horizontal sliding column (621). A spring (622) is sleeved on the outside of the horizontal sliding rod (614), one end of which is fixedly connected to the rod wall of the horizontal sliding rod (614), and the other end of which is fixedly connected to the outer wall of the round tube (3).

10. A device for detecting the permeability of anti-corrosion coating on the inner wall of a biomass boiler under high temperature and high pressure according to claim 2, characterized in that, The sidewalls of the upper turntable (414) and the lower turntable (416) are sealed and fitted to the inner sidewall of the switching channel (411), and the diameters of the upper turntable (414) and the lower turntable (416) are equal.

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