Multi-stage adsorption purification device for sulfur-containing mixed gas based on filler replacement treatment

Abstract

The application discloses a multi-stage adsorption purification device for sulfur-containing mixed gas based on filler replacement treatment and mainly relates to the technical field of sulfur-containing mixed gas treatment, and specifically comprises a multi-stage adsorption tower shell, wherein the multi-stage adsorption tower shell is a vertical sectional structure, stages are connected through flanges, and adjacent multi-stage adsorption tower shells are fixed with inter-stage linkage isolation sleeves through flanges. Through single-step rotation operation of a linkage sealing assembly, the application synchronously completes quick opening of a tower window and automatic closing of a sealing plate, realizes physical isolation between stages of a bed layer to be replaced, and combines with nitrogen inertization and replacement of residual oxygen in a partition and micro-negative pressure suction of a side suction pipe, so that filler replacement is completed through the tower window in an oxygen-free safe environment, and the safety of the multi-stage adsorption device during filler replacement is ensured.

Description

Technical Field

[0001] This invention relates to the field of sulfur-containing mixed gas treatment technology, specifically a multi-stage adsorption purification device for sulfur-containing mixed gas based on packing replacement treatment. Background Technology

[0002] Sulfur-containing adsorbents (especially iron oxide-based and zinc-based adsorbents) generate ferrous sulfide or zinc sulfide after adsorbing hydrogen sulfide. Ferrous sulfide has a strong tendency to spontaneously combust. Once it comes into contact with oxygen, it will rapidly oxidize and release heat, causing the bed to catch fire or even explode.

[0003] In existing technologies, packing replacement operations usually require tower shutdown. Tower shutdown means a drop in tower pressure and cessation of gas intake. At this time, air may seep back in from various inlets, discharge ports, pipe flanges, etc. For multi-stage adsorption towers, the stages are separated only by sieve plates or partitions, lacking reliable interstage airtight isolation. Once air enters from a certain stage (such as the lower discharge port), it will diffuse upwards along the bed, penetrate the gaps between the partitions of each stage, and come into contact with the residual ferrous sulfide in each stage bed, greatly increasing the risk of spontaneous combustion.

[0004] To address the aforementioned technical shortcomings, a solution is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-stage adsorption purification device for sulfur-containing mixed gas based on packing displacement treatment, so as to solve the problems mentioned in the background art; To achieve the above objectives, the present invention provides the following technical solution: a multi-stage adsorption purification device for sulfur-containing mixed gas based on packing displacement treatment, comprising: The multi-stage adsorption tower shell is a vertical segmented structure, with each stage connected by flanges. Inter-stage linkage isolation sleeves are fixed on adjacent sides of the multi-stage adsorption tower shell by flanges. Inter-stage linkage isolation sleeve is used to install sealing plate one and sealing plate two, which are sealed on the upper and lower sides during packing replacement treatment. Sealing plate one and sealing plate two are movably connected, and the gas flow in the shell of the multi-stage adsorption tower is completed by opening and closing the two. The tower window is located on the shell of the multi-stage adsorption tower and between sealing plate one and sealing plate two. It provides an inlet and outlet for packing replacement. A locking groove is provided on the inner wall of the tower window. The linkage sealing assembly, installed on the tower viewing window, includes a sleeve for main body limiting. L-shaped positioning grooves are provided on both sides of the inner wall of the sleeve, which, in conjunction with the protrusions on the tower viewing window, complete the overall fixation of the sleeve. A sealing disc is located inside the sleeve, and locking sleeves are evenly installed on the sealing disc. Each locking sleeve consists of a drive head and a locking head, which are connected by a connecting post. The protrusion on the drive head of the locking sleeve engages with the groove on the rotating sleeve, and multiple sets of locking sleeve rotation drives occur as the rotating sleeve rotates. The locking head on the locking sleeve is located on the locking groove side of the tower viewing window, and engages with the locking groove as the rotating sleeve rotates. A positioning bolt is installed on the rotating sleeve, which, in conjunction with the positioning hole on the tower viewing window, locks the position after the rotating sleeve rotates.

[0006] Furthermore, sliders are slidably connected to the tracks on both sides of the sleeve. The sliders are movably connected to the sleeve via connecting rods, and the positions of the sliders on both sides are adjusted as the sleeve rotates.

[0007] Furthermore, a positioning block is slidably engaged on the inter-level linkage isolation sleeve, and a slot is provided on the inner wall of the positioning block. A movable sleeve is installed at the end of the sealing plate one, and a movable shaft is movably connected inside the movable sleeve. The movable shaft is connected to the sealing plate two. The ends of the movable sleeve and the movable shaft are provided with side protrusions, which abut against the slots on the positioning blocks on both sides.

[0008] Furthermore, the movable sleeve protrusion corresponding to the top side positioning block faces the same direction as the sealing plate, and the upper side protrusion of the movable shaft faces the same direction as the second sealing plate. The movable sleeve protrusion corresponding to the bottom side positioning block faces the opposite direction to the first sealing plate, and the upper side protrusion of the movable shaft faces the opposite direction to the second sealing plate. That is, when placed in the same direction, the rotation direction is the same; when placed in opposite directions, the rotation direction is opposite.

[0009] Furthermore, a nitrogen purging assembly is installed on the shell side of the multi-stage adsorption tower, and a liquid nitrogen storage tank is installed on the side of the nitrogen purging assembly. The nitrogen purging assembly includes a main nitrogen pipeline and a distribution pipe corridor. The main supply pipeline is drawn from the nitrogen source and sent to the shell of the multi-stage adsorption tower through the distribution pipe corridor.

[0010] Furthermore, an isolation frame is installed on the inner wall of the multi-stage adsorption tower shell, located on the side of the tower window. The isolation frame is used to place the sulfur-containing mixed gas absorption packing.

[0011] Furthermore, a side suction pipe is installed on the side of the tower window for the absorption of nitrogen after filling during the packing replacement process.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves a one-step operation of tower window sealing and inter-stage airtight isolation through the coordinated action of the linkage sealing component and the inter-stage linkage isolation sleeve, which greatly improves the safety and operational efficiency of packing replacement. During the forward rotation of the sleeve of the linkage sealing assembly, two sets of actions are driven simultaneously: First, the locking head of the locking sleeve engages with the locking groove of the tower window, pulling the sealing disc to evenly press the tower window and achieve rapid sealing and locking; Second, the slider is driven to slide outward through the linkage transmission, pushing the positioning block to move. In conjunction with the abutment structure between the side protrusion at the end of the movable sleeve and the positioning block groove, the opening of the upper and lower sealing plates one and two is controlled. The rotation of one sleeve simultaneously completes the dual functions of sealing the tower window and communicating with the inside of the tower, greatly shortening the operation time in high-risk areas and reducing the risk of misoperation. After sealing plate one and sealing plate two are closed, they form an independent sealed space, effectively blocking the path of air to seep back into the bed of the stage to be replaced from the unloading port, pipeline flange and other parts. This structurally eliminates the oxygen source conditions for the spontaneous combustion of ferrous sulfide. In conjunction with the tight fit between the flexible sealing strip on the edge of the sealing plate and the inner wall of the inter-stage linkage isolation sleeve, zero leakage airtight isolation between stages is achieved, providing a reliable airtight safety guarantee for subsequent nitrogen inerting replacement.

[0013] 2. This invention also enhances the safety of the overall replacement operation by combining zoned nitrogen inerting with micro-negative pressure suction. The nitrogen purging assembly delivers the vaporized nitrogen from the liquid nitrogen storage tank to each level of the bed through the distribution pipe gallery, achieving independent zoned inerting and purging. A large flow of nitrogen is injected simultaneously from the bottom and top of the bed to forcibly replace residual oxygen and simultaneously remove the adsorption reaction heat accumulated in the bed to achieve cooling and flame suppression. During the packing replacement process, the side suction pipe continuously suctions and discharges oxygen-containing waste gas to the tail gas treatment system. At the same time, a micro-negative pressure environment is maintained at the tower window opening to prevent sulfur-containing gas from leaking out. The continuous nitrogen supply maintains positive pressure, which works synergistically with the micro-negative pressure of the side suction pipe to effectively prevent external air from seeping in from the tower window opening, ensuring safety during packing replacement. Attached Figure Description

[0014] Figure 1 This is a partial structural diagram of the multi-stage adsorption purification device for sulfur-containing mixed gas treated by packing replacement according to the present invention; Figure 2 This is a schematic diagram of the installation of sealing plate one and sealing plate two inside the shell of the multi-stage adsorption tower of the present invention; Figure 3 This is a schematic diagram showing the connection between the nitrogen purging assembly and the shell of the multi-stage adsorption tower of the present invention; Figure 4 This is a schematic diagram of the connection structure between the linkage sealing assembly and the tower window of the present invention; Figure 5 This is a schematic diagram of the locking sleeve and the locking groove on the tower window of the present invention. Figure 6 This is a schematic diagram showing the connection between the bottom positioning block and the movable sleeve and movable shaft on sealing plate one and sealing plate two of the present invention; Figure 7This is a schematic diagram showing the connection between the top positioning block and the movable sleeve and movable shaft on sealing plate one and sealing plate two of the present invention; Figure 8 This is a schematic diagram of the inner wall structure of the positioning block of the present invention.

[0015] In the diagram: 1. Multistage adsorption tower shell; 2. Interstage linkage isolation sleeve; 3. Nitrogen purging assembly; 4. Liquid nitrogen storage tank; 5. Isolation frame; 6. Tower viewing window; 7. Side suction pipe; 8. Linkage sealing assembly; 801. Sleeve; 802. L-shaped positioning groove; 803. Rotary sleeve; 804. Sliding block; 805. Sealing circular plate; 806. Locking sleeve; 807. Positioning bolt; 9. Locking groove; 10. Positioning block; 11. Movable shaft; 12. Movable sleeve; 13. Sealing plate one; 14. Sealing plate two. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figure 1-8 The present invention provides a technical solution: Example 1: The present invention achieves smooth gas flow between each bed level during normal sulfur-containing mixed gas adsorption treatment by using a vertical segmented structure design of the multi-stage adsorption tower shell 1, combined with sealing plate 13 and sealing plate 14 installed in the inter-stage linkage isolation sleeve 2, and linkage sealing component 8 set on the tower window 6. At the same time, it provides a safe operating space when the packing replacement operation is required. Driven by the rotation of the sleeve 803, the positioning blocks 10 on both sides are pushed inward. The sealing plates 13 and 14 on the upper and lower sides are automatically closed by gravity, physically isolating the bed to be replaced from the adjacent bed. Then, a large flow of nitrogen is injected into the bed through the nitrogen purging assembly 3 and the liquid nitrogen storage tank 4 to replace and discharge the residual oxygen and cool down and suppress combustion. Finally, after the linkage sealing assembly 8 is removed, the nitrogen overflowing from the side of the tower window 6 is continuously sucked out by the side suction pipe 7 to maintain the safety of the operating position. The safe replacement of the packing material is carried out through the tower window 6, which realizes the replacement of the packing material in the multi-stage adsorption and purification device for sulfur-containing mixed gas, effectively avoiding the risk of spontaneous combustion of ferrous sulfide and ensuring production continuity and operational safety. In specific operations, such as Figure 1 and Figure 2As shown, the multi-stage adsorption tower shell 1 is a vertical segmented structure, with each stage connected by flanges. Inter-stage linkage isolation sleeves 2 are fixed on the adjacent sides of the multi-stage adsorption tower shell 1 by flanges. Sealing plate 13 and sealing plate 14 are movably connected inside the inter-stage linkage isolation sleeve 2. Sealing plate 13 and sealing plate 14 are movably connected, and the gas flow control inside the multi-stage adsorption tower shell 1 is completed by opening and closing the two. An isolation frame 5 is installed on the inner wall of the multi-stage adsorption tower shell 1 and on the side of the tower window 6. The isolation frame 5 is used to place the packing material for the absorption of sulfur-containing mixed gas. The tower window 6 is located on the multi-stage adsorption tower shell 1 and between the sealing plate 13 and the sealing plate 14, providing an inlet and outlet for packing replacement. A locking groove 9 is provided on the inner wall of the tower window 6, which is used to cooperate with the linkage sealing component 8 to achieve rapid sealing and locking. A nitrogen purging component 3 is installed on the side of the multi-stage adsorption tower shell 1, and a liquid nitrogen storage tank 4 is installed on the side of the nitrogen purging component 3. The nitrogen purging component 3 includes a nitrogen main pipeline and a distribution pipe corridor. The main supply pipeline is drawn from the nitrogen source, i.e., the liquid nitrogen storage tank 4, and sent to each level of bed in the multi-stage adsorption tower shell 1 through the distribution pipe corridor to achieve zoned inerting purging. During the normal adsorption treatment of sulfur-containing mixed gas, the sulfur-containing mixed gas enters from the bottom of the multi-stage adsorption tower shell 1 and passes through each stage of the bed in sequence. The adsorbent filled in each stage of the bed adsorbs and removes sulfur-containing components such as hydrogen sulfide from the sulfur-containing mixed gas step by step. The purified gas is discharged from the top of the tower. During this process, sealing plate 13 and sealing plate 14 are in the open state to ensure smooth gas flow between each stage of the bed and avoid additional pressure drop that would affect the adsorption efficiency. At the same time, each stage of the bed works in concert. The front stage bed bears most of the sulfur load for coarse desulfurization, and the rear stage bed performs fine desulfurization to ensure that the quality of the purified gas at the outlet is stable and meets the standards. When a packing replacement operation is required for a certain stage of the bed, for example, when the adsorbent in the preceding bed becomes saturated and needs to be replaced, the operation is first performed by rotating the sleeve 803 on the linkage sealing assembly 8. Figure 3 and Figure 4 As shown, the linkage sealing assembly 8 is set on the tower window 6, including the main body limiting sleeve 801. L-shaped positioning grooves 802 are provided on both sides of the inner wall of the sleeve 801. The sleeve 801 is fixedly installed by cooperating with the protrusion on the tower window 6. Specifically, the entire sleeve 801 is first pushed to move linearly along the L-shaped groove, and then rotated to complete the locking of the two. Conversely, if the sleeve 801 is rotated first and then moved linearly, the entire sleeve 801 is removed. A sealing circular plate 805 is provided inside the sleeve 801. Locking sleeves 806 are evenly installed on the sealing circular plate 805. The locking sleeve 806 is divided into a drive head and a locking head, which are connected by a connecting column. The protrusion on the drive head of the locking sleeve 806 engages with the groove on the rotating sleeve 803, and multiple sets of locking sleeves 806 are driven to rotate as the rotating sleeve 803 rotates. The locking head on the locking sleeve 806 is located on the locking groove 9 side of the tower window 6, and the locking head engages with the locking groove 9 as the rotating sleeve 803 rotates. This further improves the sealing effect between the sealing circular plate 805 and the tower window 6. The locking head is provided with a cross-section. During the rotation, it drives the entire connecting column to move inward, causing the entire sealing circular plate 805 and the tower window 6 to be pressed tightly together. A positioning bolt 807 is installed on the swivel sleeve 803. It works with the positioning hole on the tower window 6 to lock the position of the swivel sleeve 803 after rotation. This linkage sealing design allows the operator to drive multiple sets of locking sleeves 806 to move synchronously at the same time by rotating only one swivel sleeve 803, so as to achieve rapid locking and sealing of the tower window 6. Compared with the traditional bolt tightening method, it greatly shortens the sealing operation time and reduces the exposure risk of the operator in the dangerous area. At the same time, the synchronous locking of multiple sets of locking sleeves 806 ensures that the sealing disc 805 is evenly pressed against the tower window 6, avoiding the leakage risk caused by uneven local pressing force, and significantly improving the sealing reliability. Slider 804 is slidably connected to the rails on both sides of sleeve 801. Slider 804 is movably connected to sleeve 803 via a connecting rod. The position of slider 804 on both sides is adjusted as sleeve 803 rotates. When sleeve 803 rotates forward, it drives locking sleeve 806 to lock and seal tower window 6. At the same time, it drives slider 804 on both sides to slide outward along the rails on both sides of sleeve 801 via connecting rod transmission. During the outward sliding of slider 804, it pushes positioning block 10, which is slidably engaged on inter-stage linkage isolation sleeve 2, to move. The inner wall of positioning block 10 is provided with a slot. Movable sleeve 12 is installed at the end of sealing plate 13. Movable shaft 11 is movably connected inside movable sleeve 12. Movable shaft 11 is connected to sealing plate 14. The ends of movable sleeve 12 and movable shaft 11 are provided with side protrusions, which abut against the slots on positioning blocks 10 on both sides. Through this linkage transmission mechanism, the coordinated action of sealing the tower window 6 and closing control of sealing plate 13 and sealing plate 2 14 is realized. That is, the rotating sleeve 803 completes two functions at the same time: locking the tower window 6 and adjusting the position of the positioning block 10 with one rotation. No additional operation steps are required, which greatly simplifies the preparation process before packing replacement and reduces the complexity of operation and the risk of misoperation. Specifically, such as Figure 6 and Figure 7As shown, the side protrusion of the movable sleeve 12 corresponding to the top side positioning block 10 is in the same direction as the sealing plate 13, and the upper side protrusion of the movable shaft 11 is in the same direction as the sealing plate 14. That is, when placed in the same direction, the rotation direction is the same. The side protrusion of the movable sleeve 12 corresponding to the bottom side positioning block 10 is opposite to the sealing plate 13, and the upper side protrusion of the movable shaft 11 is opposite to the sealing plate 14. That is, when placed in reverse, the rotation direction is opposite. This design allows the top side positioning block 10 to limit the movable sleeve 12 and the movable shaft 11 when the rotating sleeve 803 rotates in the forward direction to push the positioning block 10 to move. The sealing plate 13 and the sealing plate 14 automatically rotate upward to open. The bottom side positioning block 10 drives the movable sleeve 12 and the movable shaft 11 to rotate, driving the sealing plate 13 and the sealing plate 14 to rotate in the opposite direction to the positioning block 10 to open. Through the differentiated cooperation between the upper and lower two sets of positioning blocks 10 and the movable sleeve 12 and the movable shaft 11, it is ensured that the sealing plate 13 and the sealing plate 14 can be reliably opened and closed no matter which side is operated from. This physically isolates the bed to be replaced from the adjacent bed, forming an independent sealed space. This prevents air from entering the bed to be replaced from the adjacent bed, avoiding the safety hazard of ferrous sulfide contacting oxygen and causing spontaneous combustion. At the same time, after the sealing plate 13 and the sealing plate 14 are closed, the bed to be replaced becomes an independent sealed chamber, creating conditions for subsequent nitrogen inerting replacement. After sealing plate 13 and sealing plate 14 are reliably closed, the nitrogen purging assembly 3 is started. The liquid nitrogen in the liquid nitrogen storage tank 4 is vaporized and sent to the bed in the multi-stage adsorption tower shell 1 through the nitrogen main pipeline and the distribution pipeline. A large flow of nitrogen is injected from the bottom and top of the bed to force the replacement of the residual gas in the bed and discharge the oxygen-containing gas from the side suction pipe 7. Nitrogen is continuously introduced until the oxygen concentration in the bed drops below the safety threshold. Meanwhile, the injection of large flow of nitrogen can also remove the heat of adsorption reaction accumulated in the bed, which can cool down and suppress combustion, and eliminate the thermodynamic conditions for the spontaneous combustion of ferrous sulfide. The side suction pipe 7 is installed on the side of the tower window 6 and works continuously during the packing replacement process. It discharges the oxygen-containing waste gas purged and replaced by nitrogen to the tail gas treatment system for centralized treatment, and maintains a slight negative pressure environment at the opening of the tower window 6 to prevent sulfur-containing gas from leaking out and polluting the environment or endangering the health of operators. After nitrogen purging and replacement are completed and the oxygen concentration is qualified, loosen the positioning bolt 807, rotate the sleeve 803 in the opposite direction, and the locking head of the locking sleeve 806 will exit from the locking groove 9 to release the lock. The sleeve 801 will be completely removed from the tower window 6. At this time, the tower window 6 will be open, and the operator can take out the saturated packing on the isolation frame 5 through the tower window 6 under nitrogen protection. At the same time, fresh packing will be loaded into the isolation frame 5 to complete the packing replacement operation. During the entire replacement process, since the sealing plate 13 and the sealing plate 2 14 remain closed, the bed to be replaced is physically isolated from the adjacent bed above and below, and air cannot enter through the interstage leakage path. At the same time, nitrogen is continuously introduced to maintain a positive pressure environment to prevent external air from seeping in from the opening of the tower window 6, thus ensuring the inherent safety of the packing replacement operation. After the packing is replaced, the linkage sealing assembly 8 is reinstalled on the tower window 6. The forward rotation of the sleeve 803 causes the locking head of the locking sleeve 806 to engage with the locking groove 9 to achieve sealing and locking. At the same time, the slider 804 pushes the positioning block 10 to reset, and the sealing plate 13 and sealing plate 2 14 automatically flip upward to open, restoring gas flow between each bed level. The bed level is then put back into the sulfur-containing mixed gas adsorption treatment work, which greatly improves the operating efficiency of the unit. The present invention achieves a relatively safe means of packing replacement through the coordinated operation of the multi-stage adsorption tower shell 1, the inter-stage linkage isolation sleeve 2, the nitrogen purging assembly 3, the liquid nitrogen storage tank 4, the isolation frame 5, the tower viewing window 6, the side suction pipe 7, and the linkage sealing assembly 8. Through the gravity-driven automatic closing design of the inner sealing plate 13 and sealing plate 14 of the inter-stage linkage isolation sleeve 2, the physical isolation between the bed to be replaced and the adjacent bed is achieved, effectively blocking the path of air seeping back from the unloading port, pipe flange and other parts, and structurally eliminating the oxygen source conditions for the spontaneous combustion of ferrous sulfide. The rotating sleeve 803 of the linkage sealing assembly 8 drives the locking sleeve 806 to engage with the locking groove 9 to achieve quick sealing and locking of the tower window 6. At the same time, the linkage mechanism between the slider 804 and the positioning block 10 synchronously drives the sealing plate 13 and the sealing plate 2 14 to open. One operation completes the two functions of sealing the tower window 6 and opening the interstage, which is simple and reliable to operate and greatly reduces the risk of misoperation. By using nitrogen purging assembly 3 in conjunction with liquid nitrogen storage tank 4 to inject nitrogen into the bed to be replaced at a high flow rate, the residual oxygen is quickly replaced and discharged, and the temperature is simultaneously reduced and flame is suppressed. In conjunction with side suction pipe 7, a slightly negative pressure environment is maintained, creating a safe oxygen-free operating environment for packing replacement. With the detachable design of the tower window 6, the packing can be quickly replaced under nitrogen protection. Each bed layer can be replaced independently without interference. The entire unit can complete the step-by-step replacement and renewal of all packing without stopping the tower, ensuring the continuity and stability of the purification treatment of sulfur-containing mixed gas. It has good prospects for promotion and application.

[0018] Example 2: Sealing plate 13 and sealing plate 14 are made of stainless steel that is resistant to sulfur-containing gas corrosion. With the rotating connection structure of movable sleeve 12 and movable shaft 11, they maintain good rotational flexibility and sealing reliability during long-term use. At the same time, flexible sealing strips are provided on the edges of sealing plate 13 and sealing plate 14. When sealing plate 13 and sealing plate 14 are in the closed state, the flexible sealing strips are tightly fitted with the inner wall of the interstage linkage isolation sleeve 2, further enhancing the interstage airtight isolation effect, ensuring zero leakage between the stage bed to be replaced and the adjacent stage bed, and providing a reliable sealed space for nitrogen inerting replacement. like Figure 1 As shown, each stage of the multi-stage adsorption tower shell 1 is independently equipped with a tower viewing window 6 and a linkage sealing assembly 8. Each stage is independently isolated by sealing plate 13 and sealing plate 14 in the inter-stage linkage isolation sleeve 2. Operators can flexibly select the stage that needs to be replaced with packing material according to the saturation level of the adsorbent in each stage bed. This design makes the present invention particularly suitable for operating conditions where the treatment capacity of sulfur-containing mixed gas fluctuates greatly or the adsorbent life is not uniform. It avoids the passive situation of shutting down the entire tower to replace packing material due to the premature saturation of a certain stage bed, and significantly improves the adaptability of the device to complex operating conditions and the economic efficiency of operation.

[0019] The preferred embodiments of the present invention disclosed above are only for illustrating the present invention. These preferred embodiments do not describe all details exhaustively, nor do they limit the invention to specific implementation methods. Obviously, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-stage adsorption purification device for sulfur-containing mixed gas based on packing displacement treatment, characterized in that, include: The multi-stage adsorption tower shell (1) is a vertical segmented structure, with each stage connected by flanges. Inter-stage linkage isolation sleeves (2) are fixed on the multi-stage adsorption tower shells (1) on adjacent sides by flanges. Inter-stage linkage isolation sleeve (2) is used to install sealing plate one (13) and sealing plate two (14) that are sealed on the upper and lower sides during packing replacement treatment. Sealing plate one (13) and sealing plate two (14) are movably connected and the gas flow of the multi-stage adsorption tower shell (1) is completed by opening and closing the two. The tower window (6) is set on the shell (1) of the multi-stage adsorption tower and located between the first sealing plate (13) and the second sealing plate (14) to provide an inlet and outlet for packing replacement. A locking groove (9) is provided on the inner wall of the tower window (6). The linkage sealing assembly (8) is set on the tower viewing window (6) and includes a main body limiting sleeve (801). L-shaped positioning grooves (802) are provided on both sides of the inner wall of the sleeve (801), which work together with the protrusions on the tower viewing window (6) to complete the overall fixation of the sleeve (801). A sealing circular plate (805) is provided on the inner side of the sleeve (801). Locking sleeves (806) are evenly installed on the sealing circular plate (805). The locking sleeves (806) are divided into a drive head and a locking head, which are connected by a connecting column. The protrusion on the drive head of the lock sleeve (806) engages with the slot on the rotating sleeve (803), and multiple sets of lock sleeves (806) rotate as the rotating sleeve (803) rotates. The lock head on the lock sleeve (806) is located on the lock groove (9) side of the tower window (6), and the lock head engages with the lock groove (9) as the rotating sleeve (803) rotates. A positioning bolt (807) is installed on the rotating sleeve (803), which works with the positioning hole on the tower window (6) to lock the position after the rotating sleeve (803) rotates.

2. The multi-stage adsorption purification device for sulfur-containing mixed gas based on packing displacement treatment according to claim 1, characterized in that, Slider (804) is slidably connected to the track on both sides of the sleeve (801). The slider (804) is movably connected to the sleeve (803) through a connecting rod, and the position of the slider (804) on both sides is adjusted as the sleeve (803) rotates.

3. The multi-stage adsorption purification device for sulfur-containing mixed gas based on packing displacement treatment according to claim 2, characterized in that, A positioning block (10) is slidably engaged on the inter-level linkage isolation sleeve (2). A slot is provided on the inner wall of the positioning block (10). A movable sleeve (12) is installed at the end of the sealing plate (13). A movable shaft (11) is movably connected inside the movable sleeve (12). The movable shaft (11) is connected to the sealing plate (14). The ends of the movable sleeve (12) and the movable shaft (11) are provided with side protrusions, which abut against the slots on the positioning blocks (10) on both sides.

4. The multi-stage adsorption purification device for sulfur-containing mixed gas based on packing displacement treatment according to claim 3, characterized in that, The movable sleeve (12) corresponding to the top side positioning block (10) has a side protrusion in the same direction as the sealing plate one (13), the upper side protrusion of the movable shaft (11) has a side protrusion in the same direction as the sealing plate two (14), the movable sleeve (12) corresponding to the bottom side positioning block (10) has a side protrusion in the opposite direction to the sealing plate one (13), and the upper side protrusion of the movable shaft (11) has an side protrusion in the opposite direction to the sealing plate two (14). That is, when placed in the same direction, the rotation direction is the same; when placed in the opposite direction, the rotation direction is opposite.

5. The multi-stage adsorption purification device for sulfur-containing mixed gas based on packing displacement treatment according to claim 4, characterized in that, A nitrogen purging assembly (3) is installed on the side of the multi-stage adsorption tower shell (1), and a liquid nitrogen storage tank (4) is installed on the side of the nitrogen purging assembly (3). The nitrogen purging assembly (3) includes a nitrogen main pipeline and a distribution pipeline. The main supply pipeline is drawn from the nitrogen source and sent to the multi-stage adsorption tower shell (1) through the distribution pipeline.

6. The multi-stage adsorption purification device for sulfur-containing mixed gas based on packing displacement treatment according to claim 5, characterized in that, An isolation frame (5) is installed on the inner wall of the multi-stage adsorption tower shell (1) and on the side of the tower window (6). The isolation frame (5) is used to place the packing material for absorbing sulfur-containing mixed gas.

7. The multi-stage adsorption purification device for sulfur-containing mixed gas based on packing displacement treatment according to claim 6, characterized in that, A side suction pipe (7) is installed on the side of the tower window (6) for the absorption of nitrogen after filling during the packing replacement process.

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