A VOCs exhaust gas washing tower

Abstract

The application relates to the technical field of waste gas treatment equipment, in particular to a VOCs waste gas washing tower which comprises a tower body, a plurality of support assemblies are arranged in the tower body, the support assembly comprises a support ring fixed in the tower body, an upper support net fixed on the support ring and a lower support net rotationally connected to the support ring, the upper support net and the lower support net are arranged at intervals, a filler layer is arranged between the upper support net and the lower support net, the upper end and the lower end of the mounting cylinder are both arranged as openings, a plugging assembly for plugging the opening above the mounting cylinder is arranged in the mounting cylinder, the plugging assembly comprises a mounting frame fixed on the inner wall of the mounting cylinder, a mounting rod slidingly connected to the mounting frame and a plugging ring fixed on the mounting rod, and the plugging ring is used for plugging the opening at the upper end of the mounting cylinder. The application has the effect of improving the treatment efficiency of waste gas.

Description

Technical Field

[0001] This application relates to the technical field of waste gas treatment equipment, and in particular to a VOCs waste gas scrubbing tower. Background Technology

[0002] VOCs exhaust gas scrubbing towers, also known as packed absorption towers, are structures where liquid flows downwards along the surface of the packing material during operation, with gas and liquid flowing counter-currently or concurrently. The tower body adopts a vertical cylindrical design, with a support plate at the bottom to support randomly piled or integrally packed packing material, and a liquid distributor at the top to ensure initial spray uniformity. To address the wall flow effect, the segmented installation of liquid redistribution devices (such as perforated disc or conical distributors) becomes crucial, maintaining mass transfer stability through a collection-mixing-redistribution process.

[0003] For example, Chinese patent document CN223464629U discloses a packed spray tower, including a tower body. The top of the tower body has an air outlet pipe, and the lower side wall of the tower body has an air inlet pipe. Two mesh plates are fixedly installed inside the tower body, each mesh plate has a packing layer, and each packing layer has a spray assembly on its upper side. Each spray assembly has an inspection window on one side, located on the side wall of the tower body. One side of the inspection window has a cover plate. The spray assembly includes spray... The spray plate is installed inside the tower body. A handle is provided on one side of the spray plate, and support rods one and two are located at the bottom of the spray plate. Both ends of support rods one and two are fixed to the inner wall of the tower body. A flow guiding cavity is provided inside the spray plate, and a spray groove is located at the bottom of the flow guiding cavity. Multiple nozzles are provided in the spray groove, and all nozzles are connected to the interior of the flow guiding cavity. A liquid inlet is provided on one side wall of the flow guiding cavity, and a sealing ring is provided inside the liquid inlet. A liquid inlet connector corresponding to the liquid inlet is provided on the inner wall of the tower body. Exhaust gas enters the tower body through the inlet pipe, passes through the mesh of the mesh plate, and enters the gaps in the packing layer. The exhaust gas comes into contact with the spray liquid in the gaps of the packing layer. The packing layer increases the contact area between the exhaust gas and the spray liquid, allowing harmful substances in the exhaust gas to be effectively absorbed or neutralized by the spray liquid. The purified exhaust gas is then discharged from the outlet pipe.

[0004] In the aforementioned technologies, the exhaust gas comes into contact with the spray liquid in the gaps between the packing layers. The packing layer increases the contact area between the exhaust gas and the spray liquid, enabling the harmful substances in the exhaust gas to be effectively absorbed or neutralized by the spray liquid. However, during long-term operation, the packing components are prone to the adhesion of dirt, scale, or biological slime due to gas-liquid interaction, causing caking between adjacent packing components. This leads to a decrease in the mass transfer efficiency of the entire packing layer or even its failure. This not only reduces the specific surface area and effective mass transfer performance of the packing but may also increase resistance, resulting in a decrease in the exhaust gas treatment efficiency. Summary of the Invention

[0005] This application provides a VOCs waste gas scrubbing tower, which aims to solve the problem of caking between packing components in related technologies.

[0006] The VOCs waste gas scrubbing tower provided in this application adopts the following technical solution:

[0007] A VOCs waste gas scrubbing tower includes a tower body with multiple support components arranged at intervals along the height of the tower body. Each support component has a packing layer. Each support component includes a support ring fixed inside the tower body, an upper support mesh fixed to the support ring, and a lower support mesh rotatably connected to the support ring. The upper and lower support meshes are spaced apart, and the packing layer is disposed between the upper and lower support meshes. An installation groove is formed at the center of each of the upper and lower support meshes, and an installation cylinder is disposed within the installation groove. The installation cylinder is fixed to the upper support mesh, and both its upper and lower ends are open. A sealing component is disposed inside the installation cylinder to seal the opening at the top of the installation cylinder. The sealing component includes an installation frame fixed to the inner wall of the installation cylinder, an installation rod slidably connected to the installation frame, and a sealing ring fixed to the installation rod. The sealing ring is used to seal the opening at the top of the installation cylinder.

[0008] By adopting the above technical solution, the sealing component is a key part of the VOCs waste gas scrubbing tower, consisting of a mounting frame, a mounting rod, and a sealing ring. The mounting frame is fixed to the inner wall of the mounting cylinder, the mounting rod is slidably connected to it, and the sealing ring is fixed to the end of the mounting rod to seal the opening at the top of the mounting cylinder. During normal operation, the sealing ring is pressed tightly against the top of the mounting cylinder under the force of gravity, forming a seal and preventing gas and liquid from passing through. When the packing layer becomes compacted, the gas pressure below the lower support mesh increases sharply, pushing the sealing ring upward, thereby opening the opening at the top of the mounting cylinder. At this time, some gas enters from the lower opening, and liquid flows in from the upper opening, and the two fully contact and react inside the mounting cylinder. This design utilizes gas pressure changes to ensure that the device can continue to effectively treat gas even when the packing layer fails, ensuring overall operational stability and efficiency, and demonstrating the intelligence and reliability of the VOCs waste gas scrubbing tower.

[0009] Optionally, multiple pushing rubber strips are fixedly installed on the upper surface of the lower support net, the lower support net is rotatably connected to the support ring, and the mounting rod is provided with a drive component for driving the lower support net to rotate.

[0010] By adopting the above technical solution, multiple rubber pushing strips with pointed ends are fixed on the lower support mesh and evenly distributed on the upper surface of the lower support mesh. A drive assembly is installed on the mounting rod, which can drive the lower support mesh to rotate. When the packing layer becomes caked, the drive assembly is activated, and the lower support mesh rotates accordingly, which in turn drives the pushing strips to rotate as well. During rotation, the pushing strips agitate the packing components clamped between the upper and lower support meshes, effectively breaking up the caked areas. This action restores the flow path of liquid from top to bottom and gas from bottom to top, increasing the gas-liquid contact area and improving mass transfer efficiency. Through this design, even when the packing layer becomes clogged, the device can still maintain good gas treatment performance, ensuring the efficient and stable operation of the VOCs waste gas scrubbing tower.

[0011] Optionally, the drive assembly includes a drive frame fixed to the lower support net, a drive block fixed to the drive frame, and a threaded groove formed on the mounting rod. The mounting rod passes through the drive frame, and the drive block is engaged in the threaded groove.

[0012] By adopting the above technical solution, the drive assembly consists of a drive frame, a drive block, and a threaded groove. The drive frame is fixed to the lower support mesh, and the drive block is fixed on it and engaged in the threaded groove of the mounting rod. When the sealing ring is driven by gas pressure to move the mounting rod, the mounting rod slides along the mounting frame. During this process, the drive block interacts with the threaded groove, converting linear motion into rotational motion, thereby driving the drive frame and the lower support mesh to rotate. The rotation of the lower support mesh further drives multiple pushing rubber strips to rotate. These rubber strips agitate the packing components clamped between the upper and lower support meshes, effectively breaking up the slab areas. This achieves automatic cleaning of the packing layer, ensuring smooth gas-liquid flow, increasing the contact area, and improving gas treatment efficiency. Through this mechanism, the VOCs waste gas scrubbing tower can quickly restore its performance when the packing layer becomes clogged, ensuring a continuous and efficient waste gas purification effect.

[0013] Optionally, the drive block is configured as a drive ball, which is rotatably connected to the drive frame and slides within a threaded groove.

[0014] By adopting the above technical solution, the drive block uses a drive ball design. This ball is rotatably connected to the drive frame and embedded in the threaded groove of the mounting rod. When the sealing ring pushes the mounting rod to move under air pressure, the drive ball slides along the threaded groove, converting linear motion into rotational force, which drives the drive frame and lower support mesh to rotate. This conversion mechanism ensures efficient and stable power transmission, enabling the driving strip to effectively agitate the packing layer and break up caking. The design of the drive ball optimizes transmission efficiency, reduces frictional resistance, and enhances the system's self-cleaning ability, thereby ensuring the stable operation and high-efficiency treatment performance of the VOCs waste gas scrubbing tower under complex operating conditions.

[0015] Optionally, the sealing ring is provided with a clamping ring, the outer diameter of which is larger than the inner diameter of the mounting cylinder.

[0016] By adopting the above technical solution, since the diameter of the clamping ring is larger than the diameter of the mounting cylinder, it is easier for the clamping ring to better seal the opening at the upper end of the mounting cylinder.

[0017] Optionally, the upper end of the pushing strip is configured as a pointed structure.

[0018] Optionally, the clamping ring is provided with a guide surface.

[0019] Optionally, a pull spring is fitted on the mounting rod. One end of the pull spring is fixed to the sealing ring, and the other end is fixed to the mounting bracket. The pull spring is used to pull the sealing ring downward, so that the sealing ring seals the opening above the mounting cylinder during the movement of the sealing ring.

[0020] By adopting the above technical solution, when the packing layer caking causes the gas pressure below the lower support net to rise to a set threshold, the high-pressure gas pushes the sealing ring and its clamping ring upwards, stretching the spring and opening the opening at the top of the mounting cylinder. At this time, some high-pressure gas rushes into the mounting cylinder from the lower opening, while the liquid at the top of the tower flows in through the upper opening, and the two react in opposite directions inside the cylinder. This design utilizes a gas pressure linkage mechanism to automatically switch the flow channel when the packing layer fails, ensuring continuous and effective gas-liquid mixing. Through the bypass processing function of the mounting cylinder, even if the main packing layer is blocked, the system can still maintain high-efficiency purification capacity, reduce downtime maintenance, and significantly improve the operational stability and treatment efficiency of the VOCs scrubbing tower. During this process, the drive block interacts with the threaded groove, converting linear motion into rotational motion, thereby driving the drive frame and the lower support net to rotate. The rotation of the lower support net further drives multiple pushing rubber strips to rotate, which agitate the packing components clamped between the upper and lower support nets, effectively breaking up the caking area. The automatic cleaning of the packing layer is achieved, ensuring smooth gas and liquid flow. Then, the spring is pulled to reset the sealing ring, sealing the opening above the installation cylinder, allowing both liquid and gas to pass through the packing layer.

[0021] Optionally, the sealing ring is provided with an inclined surface.

[0022] By adopting the above technical solution, when the gas pressure below the lower support mesh is too high, the gas below will push the sealing ring to move. The sealing ring will drive the clamping ring to move upward, and at the same time, the drive component will drive the lower support mesh to rotate, stirring the slab of the packing layer. Then, the gas and liquid continue to pass through the packing layer, and the gas pressure below the lower support mesh will decrease. The pull spring will pull the mounting rod and the sealing ring to move downward. Since the sealing ring is provided with an inclined surface, during the process of the pull spring driving the sealing ring to reset, it is easier for the sealing ring to move into the mounting cylinder better, and the clamping ring abuts against the upper end face of the mounting cylinder.

[0023] Optionally, a limiting ring is provided on the mounting rod, and the diameter of the limiting ring is larger than the diameter of the mounting rod.

[0024] By adopting the above technical solution, when the gas pressure below the lower support net is too high, the gas below will push the sealing ring to move, and the sealing ring will drive the pressing ring to move upward. The position of the installation rod can be limited by the setting of the limit ring, which can prevent the sealing ring from detaching from the installation cylinder.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. During normal operation, the sealing ring adheres tightly to the upper end of the mounting cylinder under gravity, forming a seal and preventing gas and liquid from passing through. When the packing layer caking occurs, the gas pressure below the lower support mesh increases sharply, pushing the sealing ring and the clamping ring (with a diameter larger than the inner diameter of the mounting cylinder) upward, thereby opening the opening at the top of the mounting cylinder. At this time, some gas enters from the lower opening, and liquid flows in from the upper opening, and the two fully contact and react inside the mounting cylinder. By utilizing the gas pressure change, the device can still effectively process gas even when the packing layer fails, ensuring overall operational stability and efficiency, and demonstrating the intelligence and reliability of the VOCs waste gas scrubbing tower.

[0027] 2. When the sealing ring moves the mounting rod under air pressure, the mounting rod slides along the mounting frame. During this process, the drive block interacts with the threaded groove, converting linear motion into rotational motion, which in turn drives the drive frame and the lower support mesh to rotate. The rotation of the lower support mesh further drives multiple pushing rubber strips to rotate. These rubber strips agitate the packing components clamped between the upper and lower support meshes, effectively breaking up the caking areas, achieving automatic cleaning of the packing layer, ensuring smooth gas-liquid flow, increasing the contact area, and improving gas treatment efficiency.

[0028] 3. When the sealing ring is pushed by air pressure to move the mounting rod, the drive ball slides with the threaded groove, converting linear motion into rotational force, which drives the drive frame and lower support mesh to rotate. This conversion mechanism ensures efficient and stable power transmission, enabling the push rubber strip to effectively agitate the packing layer and break up caking. The design of the drive ball optimizes transmission efficiency and reduces frictional resistance. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0030] Figure 2 This is a cross-sectional view of the tower body according to an embodiment of this application.

[0031] Figure 3 This is a schematic diagram of the supporting component structure according to an embodiment of this application.

[0032] Figure 4 This is a cross-sectional view of the support ring according to an embodiment of this application.

[0033] Figure 5 This is a schematic diagram of the pushing rubber strip structure according to an embodiment of this application.

[0034] Figure 6 This is a schematic diagram of the drive frame and drive block structure according to an embodiment of this application.

[0035] Figure 7 This is a schematic diagram of the mounting cylinder and mounting bracket structure according to an embodiment of this application.

[0036] Figure 8 This is a schematic diagram of the sealing component structure according to an embodiment of this application.

[0037] Reference numerals: 1. Tower body; 11. Liquid distributor; 12. Liquid inlet pipe; 13. Liquid outlet pipe; 14. Air inlet pipe; 15. Exhaust pipe; 16. Slag outlet pipe; 17. Packing layer; 2. Support assembly; 21. Support ring; 22. Upper support mesh; 23. Lower support mesh; 3. Mounting groove; 31. Mounting cylinder; 32. Guide surface; 33. Inclined surface; 34. Limiting ring; 4. Sealing assembly; 41. Mounting frame; 42. Mounting rod; 43. Sealing ring; 44. Compression ring; 45. Pulling spring; 5. Pushing rubber strip; 6. Drive assembly; 61. Drive frame; 62. Drive block; 63. Threaded groove. Detailed Implementation

[0038] The following combination Figures 1-8 This application will be described in further detail.

[0039] This application discloses a VOCs waste gas scrubbing tower. (Refer to...) Figure 1 and Figure 2 A VOCs waste gas scrubbing tower includes a tower body 1, multiple support components 2 disposed within the tower body 1, and a liquid distributor 11. An inlet pipe 12 and an exhaust pipe 15 are located at the upper end of the tower body 1, while an air inlet pipe 14, a slag discharge pipe 16, and a liquid discharge pipe 13 are located at the bottom of the tower body 1. Impurities generated during the waste gas treatment process fall to the bottom of the tower body 1 and are finally discharged through the slag discharge pipe 16. Liquid enters the liquid distributor 11 from the inlet pipe 12 at the top of the tower and is sprayed onto the surface of the packing layer 17, forming a liquid film that flows downwards along the packing layer 17. Gas enters from the air inlet pipe 14 at the bottom of the tower, flows counter-currently upwards through the gaps in the packing layer 17, and fully contacts the liquid film. The reacted gas is discharged from the exhaust pipe 15 at the top of the tower body 1, and the liquid that falls to the bottom of the tower body 1 is discharged through the liquid discharge pipe 13. After treatment, it can be reintroduced into the liquid distributor 11 through the inlet pipe 12. For example, in VOCs treatment, the organic components in the waste gas are absorbed by the circulating liquid, and the purified gas is discharged after the entrained liquid droplets are removed by the demister.

[0040] Reference Figures 2 to 4Multiple support components 2 are spaced apart along the height of the tower body 1. Each support component 2 is provided with a packing layer 17. The packing layer 17 is the core mass transfer region and is composed of randomly packed (such as Pall rings or stepped rings) or integrally packed (such as corrugated packing) packing to provide gas-liquid contact area. The tower body 1 is usually designed as a vertical cylindrical structure and is typically made of metal, ceramic, or plastic, requiring corrosion resistance and mechanical strength.

[0041] Reference Figures 2 to 4 The support assembly 2 includes a support ring 21 fixed inside the tower body 1, an upper support mesh 22 fixed to the support ring 21, and a lower support mesh 23 rotatably connected to the support ring 21. The upper support mesh 22 and the lower support mesh 23 are spaced apart. A packing layer 17 is disposed between the upper support mesh 22 and the lower support mesh 23. The packing layer 17 increases the contact area between the liquid and the gas, thereby improving the gas treatment effect. The bottom lower support mesh 23 is generally set as a grid plate, perforated plate, or beam support with a free cross-sectional ratio ≥70% to prevent the packing from collapsing under pressure and to ensure uniform gas-liquid distribution.

[0042] Reference Figures 2 to 5 Mounting grooves 3 are provided at the center of both the upper support net 22 and the lower support net 23. Mounting cylinders 31 are installed within the mounting grooves 3, fixing the cylinders 31 to the upper support net 22. Both the upper and lower ends of the mounting cylinders 31 are open, and the mounting grooves 3 on the lower support net 23 correspond to those on the mounting cylinders 31. A sealing component 4 is installed inside the mounting cylinder 31 to seal the opening above it. After the opening above the mounting cylinder 31 is sealed, gas and liquid can only flow from the space between the upper support net 22 and the lower support net 23. When the packing layer 17 passes through, and after the packing layer 17 becomes compacted, it cannot effectively allow liquid and gas to pass through. At this time, the gas pressure below the lower support net 23 is high, and the sealing component 4 no longer seals the opening at the upper end of the mounting cylinder 31. The liquid above enters the mounting cylinder 31 through the opening at the top of the mounting cylinder 31, and the gas below enters the mounting cylinder 31 through the opening at the bottom of the mounting cylinder 31. The liquid and gas come into contact inside the mounting cylinder 31, so that even when the packing layer 17 becomes compacted, the gas can still be processed through the mounting cylinder 31.

[0043] Reference Figures 2 to 5 The packing layer 17 includes multiple packing elements, which are stacked between the upper support net 22 and the lower support net 23. The packing elements adopt a high specific surface area and low resistance structure design. Common types include bulk packing (such as Pall rings, Raschig rings, stepped rings, hollow spheres) and structured packing (such as corrugated plates, wire mesh corrugated packing). The materials are mostly metal, plastic or ceramic. The specific material of the packing element needs to match the corrosiveness of the medium and the operating temperature. In this embodiment, the packing element is a hollow sphere structure and the material of the packing element is a plastic structure.

[0044] After the liquid enters the liquid distributor 11 from the top inlet pipe 12, it first undergoes primary diversion through the main distribution tank, uniformly guiding the liquid to multiple secondary branches. In the secondary structure, the liquid is further dispersed through nozzles, orifices, or guide plates, forming fine droplets or continuous liquid films that cover the surface of the packing layer 17. This process must meet the dual requirements of uniformity and dispersion: on the one hand, by accurately calculating the spacing between diversion points (usually 100-300 mm) and the porosity (5%-15%), it is ensured that there are no dry zones laterally; on the other hand, by utilizing the Venturi effect or pressure atomization principle, the droplet size is controlled within the range of 2-5 mm to increase the specific surface area. When the liquid flows downward along the packing, it comes into countercurrent contact with the exhaust gas flowing upward, and the solute components (such as benzene compounds and esters) are rapidly transferred to the liquid phase through diffusion and turbulence.

[0045] Reference Figures 3 to 8 The sealing assembly 4 includes a mounting bracket 41 fixed to the inner wall of the mounting cylinder 31, a mounting rod 42 slidably connected to the mounting bracket 41, and a sealing ring 43 fixed to the mounting rod 42. The sealing ring 43 is used to seal the opening at the upper end of the mounting cylinder 31. The diameter of the mounting rod 42 is smaller than the diameter of the mounting cylinder 31. A clamping ring 44 is provided on the sealing ring 43. The outer diameter of the clamping ring 44 is larger than the inner diameter of the mounting cylinder 31. The sealing ring 43 moves downward under the action of gravity, and then the clamping ring 44 abuts against the upper end of the mounting cylinder 31. After the packing layer 17 between the upper support net 22 and the lower support net 23 becomes compacted, only a small amount of gas below the lower support net 23 can pass through the packing layer 17. 7. At this time, the gas pressure below the lower support net 23 will increase. The gas below the lower support net 23 will push the sealing ring 43 and the pressing ring 44 on the sealing ring 43 to move upward. Then the opening above the mounting cylinder 31 will open. A part of the gas below the lower support net 23 will enter the mounting cylinder 31 through the opening below the mounting cylinder 31. The liquid above will enter the mounting cylinder 31 through the opening above the mounting cylinder 31. The gas below will enter the mounting cylinder 31 through the opening below the mounting cylinder 31. The liquid and gas will come into contact inside the mounting cylinder 31. Even if the packing layer 17 becomes caked, the gas can still be processed through the mounting cylinder 31, so as not to affect the gas processing of the entire device.

[0046] Reference Figures 3 to 8 A guide surface 32 is provided on the compression ring 44, and an inclined surface 33 is provided on the sealing ring 43. The inclined surface 33 facilitates the insertion of the sealing ring 43 into the upper opening of the mounting cylinder 31. During the upward movement of the sealing ring 43, the sealing ring 43 will drive the compression ring 44 to move upward. Then, under the action of the guide surface 32, the upward-moving gas diffuses outward and flows upward more evenly.

[0047] Reference Figures 3 to 8A limiting ring 34 is provided on the mounting rod 42. The diameter of the limiting ring 34 is larger than the diameter of the mounting rod 42. The position of the mounting rod 42 can be limited by the setting of the limiting ring 34. Meanwhile, a pull spring 45 is fitted on the mounting rod 42. One end of the pull spring 45 is fixed to the sealing ring 43, and the other end is fixed to the mounting bracket 41. The pull spring 45 is used to pull the sealing ring 43 downward. During the movement of the sealing ring 43, the opening above the mounting cylinder 31 is sealed. When the gas below the lower support net 23 reaches a certain pressure, the gas below the lower support net 23 will push the sealing ring 43 and the pressing ring 44 on the sealing ring 43 upward. Then the opening above the mounting cylinder 31 will open. A part of the gas below the lower support net 23 will enter the mounting cylinder 31 from the opening below the mounting cylinder 31. The liquid above enters the mounting cylinder 31 from the opening above the mounting cylinder 31, and the gas below enters the mounting cylinder 31 from the opening below the mounting cylinder 31. The liquid and gas come into contact inside the mounting cylinder 31. Even if the packing layer 17 becomes caked, the gas can still be processed through the mounting cylinder 31.

[0048] Reference Figures 3 to 8 A pushing rubber strip 5 is provided on the lower support net 23. The pushing rubber strip 5 is made of rubber, and multiple pushing rubber strips 5 are provided. The upper end of the pushing rubber strip 5 is a pointed structure. Multiple pushing rubber strips 5 are fixed on the upper surface of the lower support net 23. A driving component 6 is provided on the mounting rod 42. The driving component 6 is used to drive the lower support net 23 to rotate. When the lower support net 23 drives the pushing rubber strip 5 to rotate, it will drive the packing material between the upper support net 22 and the lower support net 23 to move. During the movement of the packing material, the agglomerates will be agitated. During the agitation, the agglomerates will be broken up, and then the liquid above can flow downward through the packing material, and the gas below can flow upward through the packing material. Thus, the contact area between the liquid and the gas can still be increased through the packing material, so that the gas treatment effect is better.

[0049] Reference Figures 3 to 8The drive assembly 6 includes a drive frame 61 fixed to the lower support net 23, a drive block 62 fixed to the drive frame 61, and a threaded groove 63 formed on the mounting rod 42. The mounting rod 42 passes through the drive frame 61, and the drive block 62 is engaged in the threaded groove 63. Due to the gas pressure, the sealing ring 43 can drive the mounting rod 42 to move. During the sliding process of the mounting rod 42 on the mounting frame 41, the drive block 62 and the threaded groove 63 can drive the drive frame 61 to rotate. The rotation of the drive frame 61 will drive the lower support net 23 to rotate, which in turn will drive multiple pushing rubber strips 5 to rotate. The rotation of the pushing rubber strips 5 will drive the packing material between the upper support net 22 and the lower support net 23 to move. During the movement of the packing material, the clumps will be agitated and broken up. In this embodiment, the drive block 62 can be configured as a drive ball, which is rotatably connected to the drive frame 61 and slides within the threaded groove 63, thereby better driving the drive frame 61 to rotate.

[0050] When the VOCs waste gas scrubbing tower is working, the waste gas enters from the bottom inlet pipe 14, passes upward through the packing layer 17, and the liquid enters from the top liquid inlet pipe 12 into the liquid distributor 11. The liquid distributor sprays the liquid onto the surface of the packing layer 17, forming a liquid film that flows downward. The gas and liquid flow counter-currently, making full contact in the packing layer 17, allowing the organic components to be absorbed. The purified gas is discharged from the exhaust pipe 15, and the bottom liquid is treated by the drain pipe 13 and can be recycled. Impurities are discharged through the slag discharge pipe 16. The support components 2 are spaced along the height of the tower body 1. Upper support nets 22 and lower support nets 23 are fixed on the support rings 21, spaced vertically. The packing layer 17 is placed between them to increase the gas-liquid contact area. The bottom lower support net 23 has a grid structure to ensure uniform gas-liquid distribution and prevent packing collapse. The mounting cylinder 31 is located in the central mounting groove 3 of the upper and lower support nets 23. The sealing component 4 can seal the upper opening of the mounting cylinder 31 when the packing layer 17 is normal, allowing gas and liquid to pass only through the packing layer 17. When the packing layer 17 hardens, the air pressure below the lower support net 23 increases, pushing the sealing component 4 to open the upper opening of the mounting cylinder 31, allowing some gas and liquid to enter the mounting cylinder 31 for contact and reaction, ensuring the treatment effect. The packing layer 17 is made of hollow spherical plastic packing components with high specific surface area and low resistance. The sealing component 4 includes a mounting frame 41, a mounting rod 42, and a sealing ring 43. The opening and closing are controlled by gravity and air pressure changes. The guide surface 32 on the clamping ring 44 and the inclined surface 33 on the sealing ring 43 facilitate operation. The limiting ring 34 limits the position of the mounting rod 42, and the pulling spring 45 assists in sealing. In addition, the lower support net 23 is provided with a pointed pushing rubber strip 5. The drive assembly 6 includes a drive frame 61, a drive block 62 and a threaded groove 63. When the sealing ring 43 drives the mounting rod 42 to move, the drive block 62 cooperates with the threaded groove 63 to make the drive frame 61 rotate, thereby driving the lower support net 23 and the pushing rubber strip 5 to rotate, stirring the packing components to break up the clumps, restoring gas-liquid flow, and improving processing efficiency.

[0051] The implementation principle of a VOCs waste gas scrubbing tower in this application embodiment is as follows: The tower body 1 of the VOCs waste gas scrubbing tower is a vertical cylindrical shape, and the material can be metal, ceramic or plastic, which has good corrosion resistance and mechanical strength, and provides a stable bearing environment for the entire waste gas treatment process.

[0052] In the design of the gas and liquid flow path, the waste gas enters from the inlet pipe 14 at the bottom of the tower, while the circulating liquid flows in through the liquid inlet pipe 12 at the top of the tower. After being evenly sprayed onto the surface of the packing layer 17 by the liquid distributor 11, it forms a liquid film and flows downward. The gas and liquid are in a counter-current state. This reverse contact method greatly increases the contact area and time between the two, so that the organic components in the waste gas can be fully absorbed by the circulating liquid. The purified gas is discharged from the exhaust pipe 15 at the top of the tower, and the liquid and impurities at the bottom are discharged through the liquid drain pipe 13 and the slag drain pipe 16, respectively. The liquid can also be recycled after treatment, realizing efficient use of resources and environmental protection.

[0053] The support components 2 are crucial for ensuring the stability of the packing layer 17. They are spaced apart along the height of the tower body 1. Each support component 2 includes a support ring 21 fixed inside the tower body 1. The upper support net 22 on the ring cooperates with the rotatably connected lower support net 23 to securely hold the packing layer 17. The bottom lower support net 23 adopts the form of a grid plate, perforated plate, or beam support, with a free cross-sectional area of ​​≥70%, effectively preventing the packing from collapsing under pressure, ensuring uniform gas-liquid distribution, and creating favorable conditions for gas-liquid mass transfer.

[0054] The mounting cylinder 31 and its sealing assembly 4 are located at the center of the upper support net 22 and the lower support net 23, and are set inside the mounting groove 3. Under normal circumstances, the sealing assembly 4 tightly seals the upper opening of the mounting cylinder 31, allowing gas and liquid to only contact and react through the packing layer 17. Once the packing layer 17 becomes caked, the gas pressure below the lower support net 23 increases, which pushes the sealing ring 43 to open the upper opening of the mounting cylinder 31. At this time, some gas and liquid can enter the mounting cylinder 31 to continue contact and react, avoiding a decrease in treatment effect due to problems with the packing layer 17, and ensuring the stable operation of the entire device under complex working conditions.

[0055] The packing elements of the packing layer 17 adopt a high specific surface area and low resistance structural design concept, such as hollow sphere plastic packing, which not only increases the gas-liquid contact area but also reduces gas flow resistance and improves treatment efficiency. Meanwhile, the pointed pushing rubber strip 5 and its matching drive assembly 6 on the lower support net 23 further enhance the device's adaptability. When the packing layer 17 becomes caked, the drive assembly 6, with the help of the moving mounting rod 42, drives the lower support net 23 to rotate through the interaction between the drive block 62 and the threaded groove 63. This causes the pushing rubber strip 5 to agitate the packing elements, breaking up the caked structure and restoring the normal function of the packing layer 17. This ensures smooth gas-liquid flow within the packing layer 17, enabling continuous and effective gas treatment. This comprehensively improves the performance and reliability of the VOCs waste gas scrubbing tower, providing strong technical support for industrial waste gas treatment.

[0056] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A VOCs off-gas scrubbing tower comprising a tower body, characterized in that: The tower body is equipped with multiple support components, which are spaced apart along the height of the tower body. Each support component is equipped with a packing layer. The support component includes a support ring fixed inside the tower body, an upper support net fixed on the support ring, and a lower support net rotatably connected to the support ring. The upper and lower support nets are spaced apart, and the packing layer is located between the upper and lower support nets. An installation groove is opened at the center of both the upper and lower support nets. An installation cylinder is installed in the installation groove and is fixed on the upper support net. The upper and lower ends of the installation cylinder are both open. A sealing component is installed inside the installation cylinder to seal the opening at the top of the installation cylinder. The sealing component includes an installation frame fixed on the inner wall of the installation cylinder, an installation rod slidably connected to the installation frame, and a sealing ring fixed on the installation rod. The sealing ring is used to seal the opening at the top of the installation cylinder. Multiple pushing rubber strips are fixedly installed on the upper surface of the lower support net. The lower support net is rotatably connected to the support ring. A drive component for driving the lower support net to rotate is provided on the mounting rod. The drive assembly includes a drive frame fixed to the lower support net, a drive block fixed to the drive frame, and a threaded groove opened on the mounting rod. The mounting rod passes through the drive frame, and the drive block is engaged in the threaded groove. A pull spring is fitted on the mounting rod. One end of the pull spring is fixed to the sealing ring, and the other end is fixed to the mounting bracket. The pull spring is used to pull the sealing ring downward. During the movement of the sealing ring, the clamping ring seals the opening above the mounting cylinder.

2. The VOCs off-gas scrubbing column according to claim 1, characterized in that: The drive block is configured as a drive ball, which is rotatably connected to the drive frame and slides in the threaded groove.

3. A VOCs waste gas scrubbing tower according to claim 1, characterized in that: The sealing ring is provided with a clamping ring, the outer diameter of which is larger than the inner diameter of the mounting cylinder.

4. A VOCs waste gas scrubbing tower according to claim 1, characterized in that: The upper end of the pushing strip is configured as a pointed structure.

5. A VOCs waste gas scrubbing tower according to claim 3, characterized in that: The clamping ring is provided with a guide surface.

6. A VOCs waste gas scrubbing tower according to claim 1, characterized in that: The sealing ring is provided with an inclined surface.

7. A VOCs waste gas scrubbing tower according to claim 1, characterized in that: A limiting ring is provided on the mounting rod, and the diameter of the limiting ring is larger than the diameter of the mounting rod.

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