Multistage washing system for dehydrogenation purification of butane

Abstract

The invention belongs to the field of water washing towers, and particularly relates to a multi-stage water washing system for butane dehydrogenation purification, the multi-stage water washing system comprises a tower body, a plurality of groups of filler assemblies and a plurality of groups of spraying assemblies are arranged in the tower body from top to bottom in a staggered manner, and each filler assembly comprises a fixed ring plate I fixedly arranged on the inner wall of the tower body; three packing layer plates which are stacked up and down are arranged at the center position of the first fixing ring plate, two sets of first driving assemblies which are symmetrical about the circle center of the first fixing ring plate are arranged on the first fixing ring plate, the first driving assemblies are connected with the upper packing layer plate and the lower packing layer plate in the packing assemblies, and second driving assemblies are jointly arranged between the first driving assemblies and the corresponding first fixing ring plate; the second driving assembly is connected with the middle packing layer plate. The packing layer is divided, the spraying frame is adjustable, the cleaning effect and convenience are improved, rapid cleaning can be achieved, the production efficiency is improved, the cost is reduced, impurities are efficiently removed, a catalyst is protected, the service life of equipment is prolonged, and the device is reasonable in structure and easy to implement.

Description

Technical Field

[0001] This invention belongs to the field of water washing towers, and particularly relates to a multi-stage water washing system for butane dehydrogenation purification. Background Technology

[0002] Currently, water washing is a widely adopted method in the industry for removing methanol from C4 after etherification. Among these methods, multi-stage water washing systems occupy an important position due to their relatively high purification capacity. These systems mainly rely on a water washing tower structure composed of multi-stage spraying and multi-stage packing to operate. Specifically, when gas containing impurities is introduced into the water washing tower, the impurities in the gas are absorbed stage by stage through top-down spraying and the action of the packing, thereby achieving the purpose of purification. However, existing multi-stage water washing systems have significant drawbacks. To ensure sufficient absorption of impurities, current technologies typically employ multiple layers of packing material, with each layer being thickened. The aim is to extend the gas's passage time through each layer, thereby improving absorption efficiency. However, due to the relatively narrow internal space of the washing tower, the multiple, thick packing layers present several challenges. In practical use, when gas flows upwards through the packing layers, impurities tend to clog the lower layers; conversely, when wastewater flows downwards through the packing layers, impurities accumulate in the upper layers. Furthermore, because the overall thickness of the packing layers is substantial, while existing systems can be designed for multi-layer disassembly, cleaning is required outside the tower after disassembly, which is extremely cumbersome.

[0003] Therefore, there is an urgent need for a multi-stage water washing system for butane dehydrogenation purification to solve the problem of difficult cleaning after the multi-layer thickened packing is clogged. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a multi-stage water washing system for butane dehydrogenation purification, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present application provides the following technical solution: The present invention provides a multi-stage water washing system for butane dehydrogenation purification, including a tower body. The tower body is internally equipped with multiple sets of packing assemblies and multiple sets of spray assemblies, all capable of absorbing impurities in the C4 gas after etherification. The multiple sets of packing assemblies and multiple sets of spray assemblies are staggered vertically. The packing assembly includes a fixed ring plate 1 fixedly disposed on the inner wall of the tower body. Three stacked packing layers are disposed at the center of the fixed ring plate 1. Two sets of driving assemblies 1 are disposed on the fixed ring plate 1 with their centers symmetrically opposite each other. The driving assemblies 1 are connected to the upper and lower packing layers in the packing assembly. A driving assembly 2 is disposed between the driving assembly 1 and the corresponding fixed ring plate 1. The driving assembly 2 is connected to the middle packing layer. The spray assembly includes a fixed ring plate two fixedly mounted on the inner wall of the tower body. A rotating ring is rotatably mounted inside the fixed ring plate two. Six spray frames capable of spraying water upwards and downwards are arranged within the rotating ring, grouped in sets of three. A mounting base is coaxially fixed to the inner ring of the rotating ring via a connecting plate. A driving component three is mounted on the mounting base to drive the three spray frames in the same group to move closer together. Two corresponding driving components one jointly drive the upper and lower packing layers in the packing assembly to separate vertically and move closer to the corresponding spray assembly. Driving component two drives the middle packing layer to rotate from a horizontal state to a vertical state.

[0006] According to an advantageous embodiment, the drive assembly includes a double-ended screw rotatably mounted on a fixed ring plate. Both ends of the double-ended screw are threadedly connected to lifting sliders. The upper and lower corresponding lifting sliders are fixedly connected to the upper and lower packing layers in the corresponding packing assembly through two L-shaped connecting frames.

[0007] According to an advantageous embodiment, a rectangular cavity is formed inside the fixed ring plate one near the corresponding drive component one. The drive component two includes a connecting shaft rotatably disposed within the rectangular cavity. The connecting shaft is fixedly connected to the packing layer plate in the middle of the packing assembly. A worm gear is fixedly disposed at one end of the connecting shaft located within the rectangular cavity. A worm gear meshing with the worm gear is rotatably disposed within the rectangular cavity, and a transmission gear one is fixedly disposed at both ends of the worm gear. A transmission plate is fixedly connected to the two L-shaped connecting frames located on the upper side of the drive component one. The lower end of the transmission plate movably passes through the corresponding rectangular cavity and extends to the lower side of the corresponding fixed ring plate one. A rack is fixedly disposed at the lower end of the transmission plate near the corresponding transmission gear one, and the rack meshes with the corresponding transmission gear one.

[0008] According to an advantageous embodiment, two adjacent upper and lower double-ended screws are fixedly connected by a drive shaft, and the upper end of the uppermost double-ended screw and the lower end of the lowermost double-ended screw are rotatably connected to the inner wall of the tower body through an ear seat. A motor is fixedly installed on the lowermost ear seat, and the output shaft of the motor is fixedly connected to the lower end of the lowermost double-ended screw.

[0009] According to an advantageous embodiment, the spray frame includes a rectangular mounting frame, inside which a water supply pipe is fixedly installed, and multiple nozzles distributed along its length are fixedly installed on the upper and lower end faces of the water supply pipe.

[0010] According to an advantageous embodiment, two arc-shaped guide grooves are formed on the inner wall of the inner ring of the rotating ring. The guide grooves are concentric with the corresponding rotating ring. The mounting base is configured as a disc structure. An annular guide groove is formed on the upper edge of the mounting base. Two mounting frames are fixedly disposed between the rotating ring and the guide groove. The other four mounting frames are slidably disposed in the corresponding guide groove on the side closer to the rotating ring. Four guide sliders are slidably disposed in the guide groove, and the guide sliders are fixedly connected to the corresponding mounting frames.

[0011] According to an advantageous embodiment, the drive assembly three includes a rotating shaft rotatably disposed on the upper side of the mounting base, two drive plates symmetrically opposite each other on the rotating shaft, a motor two fixedly disposed on the lower side of the mounting base, the output shaft of the motor two fixedly connected to the lower end of the corresponding rotating shaft, the two drive plates fixedly connected to the corresponding two guide sliders respectively, and a reset assembly disposed between the upper sides of the two corresponding slidable mounting frames.

[0012] According to an advantageous embodiment, the reset assembly includes an arc-shaped reset pull bar and a limiting pin, the reset pull bar and the limiting pin being fixed to two corresponding slidable mounting frames respectively, the surface of the reset pull bar having a movable hole extending along its circumference, and the limiting pin being movably disposed within the corresponding movable hole.

[0013] According to an advantageous embodiment, two limiting pins are fixedly provided on the upper side of the two mounting frames and near the rotating ring, and two limiting protrusions are fixedly provided on the inner wall of the inner ring of the rotating ring, with the limiting pins in contact with the corresponding limiting protrusions.

[0014] According to an advantageous embodiment, the inner ring of the fixed ring plate two is provided with a rotating groove, the rotating ring is rotatably disposed in the rotating groove, and a toothed ring is fixedly disposed on the outer wall of the rotating ring. A drive shaft is rotatably disposed on the inner wall of the tower body through two upper and lower lugs two. The drive shaft moves through the corresponding rotating groove and a transmission gear two is fixedly disposed on the surface inside the rotating groove. The transmission gear two meshes with the corresponding toothed ring. A motor three is fixedly disposed on the lower lug two, and the output shaft of the motor three is fixedly connected to the lower end of the drive shaft.

[0015] Compared with existing technologies, the multi-stage water washing system for butane dehydrogenation purification provided in this invention has the following beneficial effects: 1. In this invention, by splitting the traditional integral thick packing layer into three separable packing plates (upper, middle, and lower), the upper and lower packing plates are controlled to separate from each other and approach the corresponding spray components through the corresponding drive component one. This allows the upper and lower packing plates, which are most severely clogged in the same area, to be directly separated and targeted for rinsing without affecting the middle packing plate. At the same time, the middle packing plate is controlled to change from a horizontal to a vertical state through the drive component two, reducing the probability of cleaning wastewater flowing through the middle packing plate and lowering the risk of cleaning wastewater seeping into its interior.

[0016] 2. In this invention, the spray assembly supports both upward and downward spraying, allowing simultaneous cleaning of the corresponding surfaces of adjacent upper and lower packing layers, making cleaning more convenient. Furthermore, by controlling the three spray frames in the same group to move closer together through the drive assembly, the originally dispersed spray frames are brought together to form a high-intensity concentrated rinsing surface, which can significantly improve cleaning quality, reduce downtime caused by packing blockage, and extend catalyst life. Attached Figure Description

[0017] Figure 1 This is a cross-sectional three-dimensional structural view of the tower body of the present invention.

[0018] Figure 2 This is a schematic diagram showing the relative positions of the packing assembly and the spraying assembly inside the tower body in this invention.

[0019] Figure 3 This is a front sectional planar structural diagram of the present invention.

[0020] Figure 4 for Figure 3 Enlarged structural diagram of part A in the middle.

[0021] Figure 5 This is a three-dimensional structural diagram of the spray assembly in this invention.

[0022] Figure 6 This is a top view of the spray assembly in this invention.

[0023] Figure 7 for Figure 6 Enlarged structural diagram of section B.

[0024] Figure 8 This is a schematic cross-sectional view of the packing assembly during cleaning in this invention.

[0025] Figure reference numerals: 1. Tower body; 2. Packing assembly; 21. Fixed ring plate one; 22. Packing layer plate; 3. Spray assembly; 31. Fixed ring plate two; 32. Rotating ring; 321. Guide groove one; 33. Spray frame; 331. Mounting frame; 332. Water supply pipe; 333. Spray head; 34. Mounting base; 341. Guide groove two; 4. Drive assembly one; 41. Double-ended screw; 42. Lifting slider; 43. L 5. Connecting frame; 6. Drive assembly two; 7. Connecting shaft; 8. Worm gear; 9. Worm; 10. Transmission gear one; 11. Transmission plate; 2. Rack; 3. Drive assembly three; 4. Rotating shaft; 52. Drive plate; 6. Guide slider; 7. Reset assembly; 83. Reset pull bar; 9. Limit pin one; 10. Limit pin two; 11. Limit protrusion; 12. Gear ring; 13. Drive shaft; 14. Transmission gear two. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 - Appendix Figure 8 This application will now be described in further detail.

[0027] Please refer to the following: Figure 1 A multi-stage water washing system for butane dehydrogenation purification is disclosed, used to absorb methanol from post-etherified C4. The multi-stage water washing system includes a tower body 1, an external inlet pipe at the lower side of the tower body 1, an external exhaust pipe at the upper side of the tower body 1, and an exhaust system. Inside the tower body 1, multiple sets of packing assemblies 2 and multiple sets of spray assemblies 3 are arranged from top to bottom, with the packing assemblies 2 and 3 arranged alternately. Gas enters the lower side of the tower body 1 through the external inlet pipe, and the methanol and other impurities in the gas are absorbed by the spray assemblies 3 and packing assemblies 2. The washed post-etherified C4 is finally discharged from the external exhaust pipe at the upper side of the tower body 1.

[0028] See Figure 3 and Figure 4The packing assembly 2 includes a fixed ring plate 21 fixedly mounted on the inner wall of the tower body 1. Three stacked packing layers 22 are positioned at the center of the fixed ring plate 21. Two sets of drive components 4 are symmetrically positioned on the fixed ring plate 21, and the drive components 4 are connected to the upper and lower packing layers 22 in the packing assembly 2. A second drive component 5 is shared between the drive components 4 and the corresponding fixed ring plate 21, and is connected to the middle packing layer 22. The three packing layers 22 form a packing absorption layer of a certain thickness for gas absorption. Each packing layer 22 consists of a hollow outer shell and packing material filled inside the shell, with filter holes on both the top and bottom sides of the outer shell. The three-layer packing plates 22 are stacked together to absorb impurities in the gas. When cleaning and maintenance are required, the upper and lower packing plates 22 in the same packing assembly 2 can be moved away from each other by the corresponding two drive components 4. As the upper and lower packing plates move away, they will be closer to the adjacent spray assembly 3. At the same time, the middle packing plate 22 is rotated 90° by the drive component 5, so that the three-layer packing plates 22 that were originally stacked together are completely separated. The upper and lower packing plates 22 with more serious blockage in the same packing assembly 2 are brought closer to the corresponding spray assembly 3, making it easier for the spray assembly 3 to be rinsed.

[0029] See Figure 3 , Figure 5 and Figure 6 The spray assembly 3 includes a fixed ring plate 31 fixedly mounted on the inner wall of the tower body 1. A rotating ring 32 is rotatably mounted inside the fixed ring plate 31. Six spray frames 33, capable of spraying water upwards and downwards, are mounted inside the rotating ring 32. Each spray frame 33 includes a rectangular mounting frame 331 mounted inside the rotating ring 32. A water supply pipe 332 is fixedly mounted inside the mounting frame 331 and connected to an external water supply device. The specific water supply device is well-known in this technical field and will not be described in detail here. Multiple nozzles 333 are fixedly mounted on the upper and lower end faces of the water supply pipe 332, distributed along its length. The nozzles 333 are multi-functional and can form a mist or a cluster shape as needed. When the downward-facing nozzles 333 in the spray frame 33 need to absorb methanol and other impurities in the C4 after etherification, they are connected to a specific spray liquid for spraying. At the same time, during subsequent cleaning and maintenance, both the upward-facing nozzles 333 and the downward-facing nozzles 333 are connected to a cleaning liquid, which can spray washing water at a certain pressure to clean the surface of the adjacent upper packing plate 22 or lower packing plate.

[0030] See Figure 3 and Figure 4The drive assembly 4 includes a double-ended screw 41 rotatably mounted on a fixed ring plate 21. Both ends of the double-ended screw 41 are threadedly connected to lifting sliders 42. The corresponding upper and lower lifting sliders 42 are fixedly connected to the upper and lower packing layers 22 in the corresponding packing assembly 2 via two L-shaped connecting brackets 43. Adjacent upper and lower double-ended screws 41 are fixedly connected via a drive shaft. The upper end of the uppermost double-ended screw 41 and the lower end of the lowermost double-ended screw 41 are rotatably connected to the inner wall of the tower body 1 via lugs. A motor is fixedly mounted on the lowermost lug, and the output shaft of the motor is fixedly connected to the lower end of the lowermost double-ended screw 41. The motor drives the double-ended screw 41 to rotate, causing the two lifting sliders 42 on the double-ended screw 41 to move away from or towards each other. When the two lifting sliders 42 move away from each other, they can cause the upper and lower packing layers 22 of the three-layer packing layers 22, which were originally stacked together, to separate from the middle packing layer 22.

[0031] See Figure 4 The fixed ring plate 21 has a rectangular cavity near the corresponding drive assembly 4. The drive assembly 5 includes a connecting shaft 51 rotatably disposed in the rectangular cavity. The connecting shaft 51 is fixedly connected to the packing layer plate 22 in the middle of the packing assembly 2. A worm gear 52 is fixedly disposed at one end of the connecting shaft 51 in the rectangular cavity. A worm 53 is rotatably disposed in the rectangular cavity and meshes with the worm gear 52. Both ends of the worm 53 are fixedly disposed with transmission gears 54. The two L-shaped connecting frames 43 on the upper side of the drive assembly 4 are fixedly connected with transmission plates 55. The lower end of the transmission plate 55 moves through the corresponding rectangular cavity and extends to the lower side of the corresponding fixed ring plate 21. A rack 56 is fixedly disposed at the lower end of the transmission plate 55 near the corresponding transmission gear 54. The rack 56 meshes with the corresponding transmission gear 54. In order to prevent leakage at the connection between the transmission plate 55 and the fixed ring plate 21, an isolation cover is fixedly disposed on the lower side of the fixed ring plate 21. The isolation cover is sleeved on the lower half surface of the transmission plate 55. It should be noted that transmission gears 54 are provided at both ends of the worm 53 to more stably drive the worm wheel 52 to rotate when the rack 56 and transmission gear 54 are in contact. When the upper lifting slider 42 on the same double-ended screw 41 moves upward, it will drive the two corresponding L-shaped connecting brackets 43 to move upward, thereby driving the transmission plate 55 to move upward. After the transmission plate 55 moves upward to a certain height, the rack 56 on its side wall will drive the transmission gear 54 to rotate, thereby driving the corresponding worm 53 to rotate. The worm 53 drives the corresponding worm wheel 52 to rotate. The connecting shaft 51 connected to the worm wheel 52 will drive the middle packing layer plate 22 to rotate 90° (at this time, the upper and lower packing layers 22 are separated by a certain height, which will not interfere with the flipping of the middle packing layer plate 22). The middle packing layer plate 22 is in a vertical state, such as Figure 8 As shown.

[0032] In specific operation, the original integrated and thick packing layer is divided into three layers of packing plates 22 stacked together. The upper and lower packing plates 22 in the same packing assembly 2 are prone to clogging during operation. During subsequent cleaning, the upper and lower packing plates 22 in the same packing assembly 2 are controlled to move away from each other and gradually move closer to the corresponding spray frame 33 by the drive component 1 4. The spray frame 33 is equipped with upward and downward spray nozzles 333, which respectively rinse the upper and lower packing plates 22 with smaller thickness that are close to each other. At the same time, the packing plate 22 in the middle of each packing assembly 2 has the least clogging problem. In order to avoid minimizing the impact of the wastewater after cleaning during rinsing, the packing plate 22 is switched from a horizontal state to a vertical state by the drive component 2 5.

[0033] See Figure 5 Six spray frames 33 are grouped into three groups of three. The inner ring of the rotating ring 32 is coaxially fixed with a mounting base 34 via a connecting plate. Two arc-shaped guide grooves 321 are formed on the inner wall of the inner ring of the rotating ring 32, with the guide grooves 321 concentric with the corresponding rotating ring 32. The mounting base 34 is a disc structure, with an annular guide groove 341 on its upper edge. Two mounting frames 331 are fixedly positioned between the rotating ring 32 and the guide groove 341, while the other four mounting frames 331 are slidably positioned within their respective guide grooves 321 on the side closest to the rotating ring 32. Four guide sliders 7 are slidably positioned within the guide groove 341, and the guide sliders 7 are fixedly connected to their respective mounting frames 331. In each group of three spray frames 33, one mounting frame 331 is fixed, while the other two mounting frames 331 can slide within their respective guide grooves 321.

[0034] See Figure 1 , Figure 5 and Figure 6The mounting base 34 is equipped with a drive assembly 36 for driving the three spray frames 33 of the same group to move closer together. The drive assembly 36 includes a rotating shaft 61 rotatably mounted on the upper side of the mounting base 34, two drive plates 62 fixedly mounted on the rotating shaft 61 with their axes symmetrically opposite each other, a motor 2 fixedly mounted on the lower side of the mounting base 34, the output shaft of the motor 2 fixedly connected to the lower end of the corresponding rotating shaft 61, the two drive plates 62 fixedly connected to the two corresponding guide sliders 7, and a reset assembly 8 is provided between the upper sides of the two corresponding slidable mounting frames 331. The rotation of the drive shaft 61 by the second motor drives the two drive plates 62 to rotate clockwise (counterclockwise). The rotation of the drive plates 62 causes the corresponding guide slider 7 to move along the guide groove 341, so that the mounting frame 331 corresponding to the guide slider 7 can rotate about the center of the mounting base 34. After rotating a certain angle, the mounting frame 331 comes into contact with another sliding mounting frame 331 in the same group, and the two sliding mounting frames 331 in the same group can rotate together and slide towards another mounting frame 331 fixed on the mounting base 34 in the same group. The three mounting frames 331 are eventually brought as close together as possible, so that the three mounting frames 331 in each group of six mounting frames 331 are close together. During the subsequent reset, the drive shaft 61 moves in the opposite direction, and the drive plate 62 rotates in the opposite direction, so that the two sliding mounting frames 331 return to their initial positions and remain fixed through the reset component 8.

[0035] See Figure 5 and Figure 6 The reset assembly 8 includes an arc-shaped reset pull bar 81 and a limiting pin 82. The reset pull bar 81 and the limiting pin 82 are respectively fixed on two corresponding slidable mounting frames 331. The surface of the reset pull bar 81 has a movable hole extending along its circumference, and the limiting pin 82 is movably disposed in the corresponding movable hole. When the drive plate 62 moves in the reverse direction, it drives the corresponding guide slider 7 to slide in the reverse direction along the guide groove 341. After the guide slider 7 slides a certain distance, the reset pull bar 81 pulls the adjacent mounting frame 331 to slide in the reverse direction through the limiting pin 82 until it returns to its initial position after connecting with the drive plate 62 and the guide slider 7.

[0036] See Figure 6 and Figure 7Each of the two mounting frames 331 has a limiting pin 2 9 fixedly installed on its upper side near the rotating ring 32. Two limiting protrusions 10 are fixedly installed on the inner wall of the inner ring of the rotating ring 32. The limiting pin 2 9 abuts against the corresponding limiting protrusion 10. To limit the mounting frame 331 in the middle position within the same group of mounting frames 331, when the reset pull bar 81 pulls the middle mounting frame 331 along with the limiting pin 1 82 to slide to the predetermined position, the limiting pin 2 9 on the middle mounting frame 331 will abut against the limiting protrusion 10 on the inner wall of the rotating ring 32, restricting the mounting frame 331 from continuing to move in the opposite direction.

[0037] See Figure 2 and Figure 5 The inner ring of the fixed ring plate 31 has a rotating groove, and the rotating ring 32 is rotatably disposed in the rotating groove. A toothed ring 11 is fixedly disposed on the outer wall of the rotating ring 32. A drive shaft 12 is rotatably disposed on the inner wall of the tower body 1 through two upper and lower lugs 2. The drive shaft 12 moves through the corresponding rotating groove and a transmission gear 13 is fixedly disposed on the surface inside the rotating groove. The transmission gear 13 meshes with the corresponding toothed ring 11. A motor 3 is fixedly disposed on the lower lug 2, and the output shaft of the motor 3 is fixedly connected to the lower end of the drive shaft 12. The motor 3 controls the drive shaft 12 to rotate 180° in both directions, thereby driving the transmission gear 13 to rotate. The transmission gear 13 drives the corresponding toothed ring 11 to rotate, thereby driving the corresponding rotating ring 32 to rotate. The rotation of the rotating ring 32 causes all the spray racks 33 to rotate 180° in both directions, improving the spraying effect.

[0038] In operation, the spray frame 33 can spray upwards and downwards simultaneously. During normal absorption of methanol and other impurities from C4 after ether within the tower, the downward-facing nozzles on the spray frame are connected to a specific absorbent liquid for spraying. When cleaning of the upper and lower packing plates 22 in the packing assembly 2 is required, external cleaning liquid is connected, and all nozzles 333 on the spray frame 33 operate to rinse the packing plates 22 above and below the spray frame 33. Prior to this, the three spray frames 33 in the same group are driven together by the drive assembly 36 to form a larger concentrated rinsing surface, creating a more powerful instantaneous impact on the packing plates 22 and further improving the rinsing effect.

[0039] The entire multi-stage water washing system operates as follows: During normal operation, only the downward-facing nozzles 333 on each spray rack 33 are active, spraying the absorbent liquid. The upper, middle, and lower three layers of packing plates 22 in each packing assembly 2 are stacked together. Gas enters from the bottom of the tower body 1, and impurities in the gas are absorbed by the absorbent liquid sprayed through the nozzles 333. Simultaneously, the gas passes from bottom to top through the upper, middle, and lower three layers of packing plates 22 in each packing assembly 2, and finally exits from the top of the tower body 1.

[0040] During cleaning and maintenance, the three originally dispersed spray frames 33 in each spray assembly 3 converge to form a relatively concentrated rinsing surface under the control of drive assembly 36. Simultaneously, the nozzles 333 change from an atomizing state to a higher-pressure clustered state, and both upward and downward-facing nozzles 333 on the spray frames 33 operate. At this time, the upper and lower packing plates 22 of the three stacked packing layers 22 separate and approach their respective spray assemblies 3 under the control of drive assembly 1 4, while the middle packing plate 22 flips under the control of drive assembly 2 5, reducing the risk of wastewater contact with the middle packing plate 22. Rinsing can then be performed using the spray assembly 3 in this state. This reduces the cleaning difficulty of each packing assembly 2 inside the entire tower body 1 and improves the cleaning quality.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A multi-stage water washing system for butane dehydrogenation purification, comprising a tower body, wherein the interior of the tower body is provided with multiple sets of packing assemblies and multiple sets of spray assemblies, which work together to absorb methanol and other impurities in the gas, characterized in that: The packing assembly includes a fixed ring plate 1 fixedly installed on the inner wall of the tower. Three stacked packing layers are arranged at the center of the fixed ring plate 1. Two sets of drive components 1 are arranged on the fixed ring plate 1 with their centers symmetrical. The drive components 1 are connected to the upper and lower packing layers in the packing assembly. A drive component 2 is arranged between the drive component 1 and the corresponding fixed ring plate 1. The drive component 2 is connected to the middle packing layer. The spray assembly includes a fixed ring plate two fixedly installed on the inner wall of the tower body. A rotating ring is rotatably installed inside the fixed ring plate two. Six spray frames that can spray water upwards and downwards are installed inside the rotating ring. The six spray frames are grouped in groups of three. An installation seat is coaxially fixed to the inner ring of the rotating ring through a connecting plate. A drive assembly three for driving the three spray frames in the same group to move closer together is installed on the installation seat. The two corresponding drive components work together to separate the upper and lower packing layers in the packing assembly and bring them closer to the corresponding spray assembly. The second drive component drives the middle packing layer to rotate from a horizontal state to a vertical state.

2. The multi-stage water washing system for butane dehydrogenation purification according to claim 1, characterized in that, The drive assembly includes a double-ended screw that is rotatably mounted on a fixed ring plate. Both ends of the double-ended screw are threadedly connected to lifting sliders. The upper and lower corresponding lifting sliders are fixedly connected to the upper and lower packing layers in the corresponding packing assembly through two L-shaped connecting frames.

3. The multi-stage water washing system for butane dehydrogenation purification according to claim 2, characterized in that, The fixed ring plate one has a rectangular cavity near the corresponding drive component one. The drive component two includes a connecting shaft rotatably disposed in the rectangular cavity. The connecting shaft is fixedly connected to the middle packing layer plate in the packing assembly. A worm gear is fixedly disposed at one end of the connecting shaft in the rectangular cavity. A worm gear meshing with the worm gear is rotatably disposed in the rectangular cavity. Both ends of the worm gear are fixedly disposed with transmission gear one. Transmission plates are fixedly connected to the two L-shaped connecting frames on the upper side of the drive component one. The lower end of the transmission plate moves through the corresponding rectangular cavity and extends to the lower side of the corresponding fixed ring plate one. A rack is fixedly disposed at the lower end of the transmission plate near the corresponding transmission gear one. The rack meshes with the corresponding transmission gear one.

4. The multi-stage water washing system for butane dehydrogenation purification according to claim 2, characterized in that, The two adjacent double-ended screws are fixedly connected by a drive shaft. The upper end of the uppermost double-ended screw and the lower end of the lowermost double-ended screw are rotatably connected to the inner wall of the tower body through a lug. A motor is fixedly installed on the lowermost lug, and the output shaft of the motor is fixedly connected to the lower end of the lowermost double-ended screw.

5. A multi-stage water washing system for butane dehydrogenation purification according to claim 1, characterized in that, The spray frame includes a rectangular mounting frame, inside which a water supply pipe is fixedly installed. Multiple nozzles distributed along the length direction are fixedly installed on the upper and lower end faces of the water supply pipe.

6. A multi-stage water washing system for butane dehydrogenation purification according to claim 5, characterized in that, The inner wall of the rotating ring has two arc-shaped guide grooves, which are concentric with the corresponding rotating ring. The mounting base is a disc structure, and the upper edge of the mounting base has an annular guide groove. Two mounting frames are fixedly set between the rotating ring and the guide groove, and the other four mounting frames are slidably set in the corresponding guide groove on the side closer to the rotating ring. Four guide sliders are slidably set in the guide groove, and the guide sliders are fixedly connected to the corresponding mounting frames.

7. A multi-stage water washing system for butane dehydrogenation purification according to claim 6, characterized in that, The driving component three includes a rotating shaft rotatably mounted on the upper side of the mounting base, two driving plates symmetrical to each other on the rotating shaft, a motor two fixedly mounted on the lower side of the mounting base, the output shaft of the motor two fixedly connected to the lower end of the corresponding rotating shaft, the two driving plates fixedly connected to the two corresponding guide sliders, and a reset component provided between the upper sides of the two corresponding slidable mounting frames.

8. A multi-stage water washing system for butane dehydrogenation purification according to claim 7, characterized in that, The reset assembly includes an arc-shaped reset pull bar and a limiting pin. The reset pull bar and the limiting pin are respectively fixed on two corresponding slidable mounting frames. The surface of the reset pull bar has a movable hole extending along its circumference, and the limiting pin is movably disposed in the corresponding movable hole.

9. A multi-stage water washing system for butane dehydrogenation purification according to claim 6, characterized in that, Limiting pins are fixedly installed on the upper side of the two mounting frames and near the rotating ring. Two limiting protrusions are fixedly installed on the inner wall of the inner ring of the rotating ring. The limiting pins move in contact with the corresponding limiting protrusions.

10. A multi-stage water washing system for butane dehydrogenation purification according to claim 1, characterized in that, The inner ring of the fixed ring plate 2 has a rotating groove, and the rotating ring is rotatably disposed in the rotating groove. A toothed ring is fixedly disposed on the outer wall of the rotating ring. A drive shaft is rotatably disposed on the inner wall of the tower body through two upper and lower lugs 2. The drive shaft moves through the corresponding rotating groove and a transmission gear 2 is fixedly disposed on the surface inside the rotating groove. The transmission gear 2 meshes with the corresponding toothed ring. A motor 3 is fixedly disposed on the lower lug 2. The output shaft of the motor 3 is fixedly connected to the lower end of the drive shaft.

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