Double-section vacuum desorption type normal-temperature decarburization tower

Abstract

The invention discloses a double-section vacuum desorption type normal-temperature decarburization tower which comprises an outer cylinder, an inner cylinder and a filler through layer, the inner cylinder is arranged in the outer cylinder, an interlayer is formed between the outer cylinder and the inner cylinder, a mounting inner rod is arranged in the inner cylinder, a pull mounting seat is arranged on the filler through layer, and the pull mounting seat is arranged on the outer cylinder. A main guide rail groove and a side guide rail groove are formed in the pull-out mounting seat, a connecting movable rod is arranged in the main guide rail groove, a gear is mounted on the connecting movable rod, an inner rack meshed with the gear is arranged in the side guide rail groove, the pull-out mounting seat is connected with a pull-out fixing plate, and the pull rod is connected with a pull-out filler basket. By adopting the double-layer concentric tower body, taking an interlayer as a gas channel, simplifying a flow guide path, designing a wave-shaped baffle plate, matching with a gas-liquid contact cylinder and a liquid through hole, and arranging a drawing filler basket driven by a gear and a rack, the decarburization tower is convenient for filler replacement and maintenance, the decarburization efficiency is improved, the maintenance cost is reduced, and the operation condition is optimized.

Description

Technical Field

[0001] The present invention relates to the field of gas purification equipment and technology, specifically a double-stage vacuum desorption type normal temperature decarbonization tower. Background Art

[0002] In the chemical, energy and other industries, decarbonization technology is of great significance for gas purification and carbon dioxide recovery. Traditional decarbonization towers mostly adopt a single-tower structure or a multi-tower combination with complex pipeline connections, which has many technical bottlenecks. First, the gas flow path of the traditional tower body relies on a large number of external pipelines, resulting in large gas flow resistance and high energy consumption, and the pipeline connection points are prone to leakage risks and high maintenance costs; second, the design of the gas-liquid contact components is unreasonable, and the baffles are mostly flat-plate structures, with a small gas-liquid contact area, short contact time, and low mass transfer efficiency, which makes it difficult to meet the needs of efficient decarbonization; third, packing replacement and equipment maintenance are difficult. The traditional packing fixed installation method requires the disassembly of a large number of parts, which is cumbersome to operate and causes long equipment downtime, affecting production continuity. In addition, the control of the inlet flow and pressure of the traditional decarbonization tower mostly relies on manual on-site adjustment, with low control accuracy, making it difficult to achieve intelligent and precise operation. Summary of the Invention

[0003] The purpose of the present invention is to provide a two-stage vacuum desorption type room temperature decarbonization tower to solve the problems of the traditional decarbonization tower proposed in the above background technology, such as complex gas flow path, large flow resistance and easy leakage, low mass transfer efficiency of gas-liquid contact parts, difficult maintenance and cumbersome inspection of packing, and insufficient precision of manual adjustment of intake parameters, which makes it difficult to meet the requirements of efficient and stable operation.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-stage vacuum desorption type normal temperature decarbonization tower, comprising an outer tube, an inner tube and a filler layer, the inner tube being arranged inside the outer tube, and a sandwich layer being formed between the outer tube and the inner tube, an inner rod being provided in the inner tube, a pull-out mounting seat being provided on the filler layer, a main guide groove and a side guide groove being provided on the pull-out mounting seat, a connecting movable rod being provided in the main guide groove, a gear being installed on the connecting movable rod, an inner rack meshing with the gear being provided in the side guide groove, the pull-out mounting seat being connected to a pull-out fixed plate, a pull rod being provided on the pull-out fixed plate, and the pull rod being connected to a pull-out filler basket.

[0005] As a preferred technical solution of the present invention, a wave baffle is provided in the inner tube, and the wave baffle is installed in the inner tube through the baffle upper mounting part, the baffle lower mounting part and the connecting rod. A gas-liquid contact cylinder is provided on the wave baffle, and the gas-liquid contact cylinder is connected with the through cylinder. A liquid hole is provided on the gas-liquid contact cylinder, and the gas-liquid contact cylinder is fixed to the wave baffle through a bonding plate and bolts.

[0006] As a preferred technical solution of the present invention, the filler layer in the inner tube is arranged in the drawer filler basket, and the through tube is located on the side where the inner rod is installed and in the middle area of ​​the inner tube.

[0007] As a preferred technical solution of the present invention, the sealing cover at the end of the outer cylinder is detachably connected to the outer cylinder, and the V-shaped gas introduction pipe passes through the sealing cover and has the other end opening toward the interior of the inner cylinder.

[0008] As a preferred technical solution of the present invention, the remote control valve at the end of the outer cylinder is installed on the sealing cover, and the remote control valve is connected to one end of the inlet pipe.

[0009] As a preferred technical solution of the present invention, the through-hole cover at the end of the inner cylinder is sealed with the inner cylinder.

[0010] As a preferred technical solution of the present invention, the interlayer surrounds the inner tube, and sealing structures are provided at the upper and lower ends of the interlayer to ensure that the gas can circulate in the interlayer.

[0011] As a preferred technical solution of the present invention, the wave baffles are arranged in an inclined or wavy shape in the inner cylinder, and gas-liquid interlaced flow spaces are formed between adjacent wave baffles.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The retractable packing basket structure, combined with the gear and rack transmission device, makes packing replacement and maintenance operations simple and quick, without the need to disassemble a large number of parts, significantly shortening equipment downtime, reducing maintenance workload and maintenance costs. At the same time, the key components adopt a detachable connection design to further improve the maintainability of the equipment and ensure production continuity;

[0014] 2. The double-layer concentric tower structure simplifies the gas flow path and reduces gas flow resistance. The unique wave baffle and gas-liquid contact cylinder design significantly increases the gas-liquid contact area and contact time, enhancing the gas-liquid mass transfer effect. Compared with traditional decarbonization towers, the decarbonization efficiency is significantly improved, which can effectively reduce the carbon dioxide content in the gas and meet higher standards of gas purification.

[0015] 3. The remote control valve is set to achieve remote and precise adjustment of the air intake flow and pressure. The operator can flexibly adjust the operating parameters according to actual production needs, so that the decarbonization tower is always in an efficient and stable operating state. Compared with the traditional manual adjustment method, the control accuracy is higher, which can effectively reduce energy consumption, improve the intelligent operation level of the equipment, reduce manual intervention, and improve production safety and management efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a main perspective view of the present invention;

[0017] Figure 2 This is a schematic diagram showing the external structure of the present invention;

[0018] Figure 3 A schematic diagram showing the internal structure of the present invention;

[0019] Figure 4 It is a bottom view schematic diagram of the present invention;

[0020] Figure 5 for Figure 4 A magnified view of point A;

[0021] Figure 6 It is a side view schematic diagram of the present invention;

[0022] Figure 7 for Figure 6 Enlarged view of point B;

[0023] Figure 8 It is a schematic cross-sectional perspective view of the present invention;

[0024] Figure 9 for Figure 8 Enlarged view of point C;

[0025] Figure 10 This is a schematic diagram of the structure of the present invention installed on the inner rod.

[0026] In the figure: 1. Outer tube; 2. Inner tube; 3. Interlayer; 4. Filling layer; 5. Install inner rod; 6. Pull-out mounting seat; 7. Main guide groove; 8. Side guide groove; 9. Connecting movable rod; 10. Gear; 11. Inner rack; 12. Pull-out fixing plate; 13. Pull rod; 14. Pull-out filling basket; 15. Through tube; 16. Sealing cover; 17. Wave baffle; 18. Mounting part on baffle top; 19. Mounting part under baffle bottom; 20. Connecting rod; 21. Fitting plate; 22. Bolt; 23. Gas-liquid contact tube; 24. Liquid hole; 25. Remote control valve; 26. V-shaped gas inlet pipe; 27. Inlet pipe; 28. Through-fixing cover. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-10The present invention provides a double-stage vacuum desorption type normal temperature decarbonization tower, comprising an outer tube 1, an inner tube 2 and a filler layer 4, wherein the inner tube 2 is arranged inside the outer tube 1, and a sandwich layer 3 is formed between the outer tube 1 and the inner tube 2, an inner rod 5 is arranged inside the inner tube 2, a pull-out mounting seat 6 is arranged on the filler layer 4, a main guide groove 7 and a side guide groove 8 are arranged on the pull-out mounting seat 6, a connecting movable rod 9 is arranged in the main guide groove 7, a gear 10 is installed on the connecting movable rod 9, an inner rack 11 meshing with the gear 10 is arranged in the side guide groove 8, the pull-out mounting seat 6 is connected to a pull-out fixed plate 12, a pull rod 13 is provided on the pull-out fixed plate 12, and the pull rod 13 is connected to a pull-out filler basket 14;

[0029] In traditional decarbonization towers, the installation and maintenance of packing is often complex and may require the disassembly of numerous components, consuming considerable time and manpower. However, this design utilizes a pull-out structure, specifically through the ingenious combination of a gear, rack, and guide rail grooves, enabling convenient operation of the pull-out packing basket 14. This innovative structure simplifies and facilitates the replacement and maintenance of the packing, significantly reducing equipment maintenance time and improving its maintainability. Furthermore, compared to simple sliding pull-out structures, the gear and rack transmission method is more stable and reliable, reducing issues such as jamming and misalignment that may occur during the pull-out process, further enhancing the equipment's performance and ease of operation. Specifically, when the pull-out packing basket 14 needs to be operated, such as when replacing internal packing, the operator applies a pulling force to the pull rod 13. The pull rod 13 is connected to the pull-out fixing plate 12, driving the pull-out fixing plate 12 to move. The pull-out fixing plate 12 is connected to the pull-out mounting base 6, causing the pull-out mounting base 6 to move accordingly. Within the pull-out mounting base 6, a connecting movable rod 9 slides within the main guide rail groove 7, acting as a guide to ensure the accuracy of the movement direction. At the same time, the gear 10 on the connecting rod 9 meshes with the internal rack 11 in the side guide groove 8, rolling on the internal rack 11. This gear-and-rack transmission method not only converts linear motion into a more stable rolling motion, reducing friction, but also ensures smooth and stable movement of the drawer packing basket 14 through the precise coordination of the gear and rack. Ultimately, the drawer packing basket 14 can be withdrawn or advanced within the inner drum 2 along a predetermined trajectory, facilitating maintenance work such as inspection and replacement of the packing inside.

[0030] A wave baffle 17 is provided in the inner tube 2. The wave baffle 17 is installed in the inner tube 2 through the baffle upper mounting member 18, the baffle lower mounting member 19 and the connecting rod 20. A gas-liquid contact tube 23 is provided on the wave baffle 17. The gas-liquid contact tube 23 is connected to the through tube 15. A liquid hole 24 is provided on the gas-liquid contact tube 23. The gas-liquid contact tube 23 is fixed to the wave baffle 17 through a bonding plate 21 and a bolt 22. Traditional decarbonization tower baffles are mostly flat plates with limited gas-liquid contact area and contact time, and low mass transfer efficiency. The wave baffle 17 in this design significantly increases the gas-liquid contact area through its unique wave shape design. At the same time, the wave shape extends the flow path of the liquid and increases the gas-liquid contact time. The setting of the gas-liquid contact cylinder 23 and the liquid hole 24 is another innovation. They provide a special and efficient contact space for gas and liquid, so that the gas and liquid can be mixed according to a predetermined path and method. Compared with the traditional structure, the gas-liquid mass transfer efficiency is greatly improved, thereby improving the decarbonization effect of the decarbonization tower. In addition, the wave baffle 17 is installed by the baffle upper mounting part 18, the baffle lower mounting part 19 and the connecting rod 20. This installation method is easy to disassemble and replace, and is convenient for equipment maintenance and inspection. Specifically, when the gas-liquid mixture enters the inner cylinder 2, the liquid will flow along the surface of the wave baffle 17 due to the action of gravity. The wavy shape of the wave baffle 17 makes the flow path of the liquid tortuous, which increases the residence time of the liquid in the inner cylinder 2. At the same time, the gas flows upward and meets the liquid flowing along the wave baffle 17. The gas-liquid contact tube 23 is mounted on the wave baffles 17. The liquid holes 24 allow liquid to flow into the gas-liquid contact tube 23, while gas can also enter it, achieving thorough mixing of gas and liquid within the tube 23. This mixing process promotes mass transfer and reaction between the gas and liquid, aiding the decarburization reaction. Adjacent wave baffles 17 create specific spaces within which the gas and liquid flow in a staggered manner, further enhancing the gas-liquid contact effect.

[0031] The packing layer 4 in the inner tube 2 is arranged in the pull-out packing basket 14, and the through tube 15 is located on the side where the inner rod 5 is installed and in the middle area of ​​the inner tube 2; after the gas-liquid mixture enters the inner tube 2, it will first contact the packing layer 4 located in the pull-out packing basket 14. The packing layer 4 has a large specific surface area, which provides a rich place for gas-liquid mass transfer. The gas and liquid are in full contact on the surface of the packing, mass transfer and chemical reaction occur, and the purpose of decarbonization is achieved. The through tube 15 is located in the middle area of ​​the inner tube 2 and on the side where the inner rod 5 is installed. Its existence can play a role in assisting in regulating the flow of gas and liquid. On the one hand, the through tube 15 can serve as a circulation channel for gas or liquid, so that the gas and liquid can be more evenly distributed when passing through the packing layer 4; on the other hand, the gas-liquid flow in the through tube 15 can also interact with the gas-liquid flow outside the packing layer 4, promote gas-liquid mixing and mass transfer, and improve decarbonization efficiency.

[0032] The sealing cap 16 at the end of the outer cylinder 1 is detachably connected to the outer cylinder 1. A V-shaped gas introduction tube 26 passes through the sealing cap 16, with its other end opening toward the interior of the inner cylinder 2. Gas enters the decarburization tower's interlayer 3, formed by the space between the outer cylinder 1 and the inner cylinder 2. Within the interlayer 3, the gas flows along the annular channel between the outer cylinder 1 and the inner cylinder 2, reaching the end of the outer cylinder 1. At this point, the sealing cap 16 acts as a seal, preventing gas leakage from the end of the outer cylinder 1. The V-shaped gas introduction tube 26 passes through the sealing cap 16, with one end connected to the interlayer 3 and the other end opening toward the interior of the inner cylinder 2. When gas flows into the V-shaped gas introduction tube 26, pressure differentials and other factors cause the gas to enter the inner cylinder 2 through the V-shaped gas introduction tube 26, where it mixes with the gas-liquid mixture inside and participates in the decarburization reaction. Because the sealing cap 16 is detachably connected to the outer cylinder 1, the V-shaped gas introduction tube 26 can be easily removed for maintenance or replacement.

[0033] The remote control valve 25 at the end of the outer tube 1 is installed on the sealing cover 16, and the remote control valve 25 is connected to one end of the inlet pipe 27; the external gas input source is connected to the decarbonization tower through the inlet pipe 27. The remote control valve 25 is installed on the sealing cover 16 and connected to the inlet pipe 27. The operator can send a signal to the remote control valve 25 through a remote control system, such as a computer or a dedicated control terminal. After receiving the signal, the remote control valve 25 controls the opening and closing degree of the valve according to the instruction. When the valve is open, gas enters the decarbonization tower from the external gas input source through the inlet pipe 27. By adjusting the opening of the remote control valve 25, the gas flow and pressure entering the decarbonization tower can be precisely controlled. Since the remote control valve 25 is installed on the sealing cover 16, the sealing cover 16 is tightly connected to the outer tube 1, which ensures the sealing performance of the end of the outer tube 1 and prevents gas leakage.

[0034] The through-reinforced cover 28 at the end of the inner tube 2 is sealed and connected to the inner tube 2; the through-reinforced cover 28 is tightly mounted on the end of the inner tube 2, and a tight sealing structure is formed at the end of the inner tube 2 through a sealing connection method, such as using a sealing gasket or sealing material such as a sealant. There is a gas-liquid mixture in the inner tube 2, and during the operation of the decarbonization tower, there is a certain pressure inside. The sealing effect of the through-reinforced cover 28 can effectively prevent the gas-liquid mixture from leaking out of the end of the inner tube 2, maintaining a normal pressure environment and reaction environment in the inner tube 2. In this way, the gas-liquid mixture can transfer mass and react in the inner tube 2 according to the designed process, ensuring the normal operation of the decarbonization tower.

[0035] The interlayer 3 surrounds the inner tube 2, and sealing structures are provided at the upper and lower ends of the interlayer 3 to ensure that the gas circulates in the interlayer 3; the gas enters the interlayer 3 from one end of the decarbonization tower, and the interlayer 3 is an annular space surrounding the inner tube 2. Since the upper and lower ends of the interlayer 3 are respectively provided with sealing structures, such as sealing rings or sealing gaskets, these sealing structures prevent the gas from leaking out from the upper and lower ends of the interlayer 3. Therefore, the gas can only flow around along the outside of the inner tube 2 in the interlayer 3. During the flow process, the gas can be evenly distributed in the interlayer 3, and then enter the inner tube 2 through the V-shaped gas inlet pipe 26 provided at the end of the outer tube 1 to participate in the decarbonization reaction. This design ensures the directional flow of the gas in the interlayer 3, so that it can be effectively transmitted to the inner tube 2.

[0036] The wave baffles 17 are arranged in an inclined or wavy pattern within the inner tube 2, creating a gas-liquid interleaving space between adjacent wave baffles 17. Once the gas-liquid mixture enters the inner tube 2, the liquid, under the influence of gravity, flows along the inclined or wavy wave baffles 17. Due to the unique shape of the wave baffles 17, the liquid does not simply flow vertically downward, but instead flows in a zigzag pattern along the surface of the wave baffles 17. This zigzag flow prolongs the liquid's residence time within the inner tube 2, increasing the chances of contact between the liquid and the gas. Simultaneously, the gas flows upward, encountering the liquid flowing along the wave baffles 17. This creates a specific gas-liquid interleaving space between adjacent wave baffles 17, where the gas and liquid continuously mix, separate, and then remix. For example, as the liquid flows over the wave baffles 17, some of the liquid is blown away by the gas or forms droplets, mixing thoroughly with the gas. Then, under the influence of gravity, it returns to the wave baffles 17 and continues to flow. This repeated process enhances mass transfer and reaction between the gas and liquid, promoting the decarburization reaction.

[0037] In the present invention, in traditional decarbonization towers, the installation and maintenance of fillers are often complicated and may require the disassembly of a large number of parts, consuming a lot of time and manpower. However, this design adopts a pull-out structure, and in particular, through the ingenious combination of gears, racks and guide rails, it realizes the convenient operation of pulling out the filler basket 14. This innovative structure makes the replacement and maintenance of fillers simple and easy, greatly shortens the maintenance time of the equipment, and improves the maintainability of the equipment. At the same time, compared with some simple sliding pull-out structures, the gear and rack transmission method is more stable and reliable, reducing problems such as jamming and offset that may occur during the pulling process, further improving the performance and ease of operation of the equipment. Specifically, when it is necessary to operate the pull-out filler basket 14, such as replacing the internal filler, the operator applies a pulling force to the pull rod 13. The pull rod 13 is connected to the pull-out fixed plate 12, driving the pull-out fixed plate 12 to move. The pull-out fixed plate 12 is connected to the pull-out mounting seat 6, so that the pull-out mounting seat 6 also moves accordingly. In the pull-out mounting base 6, the connecting rod 9 slides within the main guide groove 7, acting as a guide to ensure the accuracy of the movement direction. At the same time, the gear 10 on the connecting rod 9 engages with the internal rack 11 within the side guide groove 8, and the gear 10 rolls on the internal rack 11. This gear and rack transmission method can, on the one hand, convert linear motion into a more stable rolling motion, reducing friction; on the other hand, the precise coordination of the gear and rack makes the movement of the pull-out stuffing basket 14 more stable and smooth. Ultimately, the pull-out stuffing basket 14 can be pulled out or pushed in within the inner tube 2 along a set trajectory, making it easier for operators to perform maintenance work such as inspecting and replacing the stuffing inside.

[0038] Traditional decarbonization tower baffles are mostly flat, resulting in limited gas-liquid contact area and contact time, and low mass transfer efficiency. The wave baffle 17 in this design, through its unique wave-shaped design, significantly increases the gas-liquid contact area. Furthermore, the wave shape extends the liquid flow path, increasing the gas-liquid contact time. The provision of the gas-liquid contact cylinder 23 and liquid passage holes 24 is another innovative feature. They provide a dedicated, efficient contact space for gas and liquid, allowing them to mix according to a predetermined path and method. Compared to traditional structures, this significantly improves gas-liquid mass transfer efficiency, thereby enhancing the decarbonization effect of the decarbonization tower. Furthermore, the wave baffle 17 is installed using the baffle upper mounting member 18, the baffle lower mounting member 19, and the connecting rod 20. This installation method facilitates disassembly and replacement, facilitating equipment maintenance and overhaul. Specifically, once the gas-liquid mixture enters the inner cylinder 2, the liquid flows along the surface of the wave baffle 17 due to gravity. The wave shape of the wave baffle 17 creates a tortuous flow path for the liquid, increasing the liquid's residence time within the inner cylinder 2. At the same time, the gas flows upward, encountering the liquid flowing along the wave baffles 17. The gas-liquid contact cylinder 23 is mounted on the wave baffles 17. The presence of the liquid passage holes 24 allows the liquid to flow into the gas-liquid contact cylinder 23, and the gas to enter it, thereby achieving thorough mixing of the gas and liquid within the gas-liquid contact cylinder 23. This mixing process promotes mass transfer and reaction between the gas and liquid, aiding the decarbonization reaction. Specific spaces are formed between adjacent wave baffles 17, where the gas and liquid flow in these spaces in a staggered manner, further enhancing the gas-liquid contact effect.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-stage vacuum desorption type room temperature decarbonization tower, comprising an outer cylinder (1), an inner cylinder (2) and a filler layer (4), characterized in that: The inner tube (2) is arranged inside the outer tube (1), and an interlayer (3) is formed between the outer tube (1) and the inner tube (2). An inner rod (5) is arranged in the inner tube (2), and a pull-out mounting seat (6) is arranged on the filler layer (4). A main guide groove (7) and a side guide groove (8) are arranged on the pull-out mounting seat (6). A connecting movable rod (9) is arranged in the main guide groove (7), a gear (10) is installed on the connecting movable rod (9), and an inner rack (11) meshing with the gear (10) is arranged in the side guide groove (8). The pull-out mounting seat (6) is connected to a pull-out fixed plate (12), and a pull rod (13) is arranged on the pull-out fixed plate (12). The pull rod (13) is connected to a pull-out filler basket (14).

2. A double-stage vacuum desorption type normal temperature decarbonization tower according to claim 1, characterized in that: A wave baffle (17) is provided in the inner tube (2). The wave baffle (17) is installed in the inner tube (2) through a baffle upper mounting member (18), a baffle lower mounting member (19) and a connecting rod member (20). A gas-liquid contact cylinder (23) is provided on the wave baffle (17). The gas-liquid contact cylinder (23) is connected to the through cylinder (15). A liquid through hole (24) is provided on the gas-liquid contact cylinder (23). The gas-liquid contact cylinder (23) is fixed to the wave baffle (17) through a bonding plate (21) and a bolt (22).

3. A double-stage vacuum desorption type normal temperature decarbonization tower according to claim 2, characterized in that: The filler layer (4) in the inner cylinder (2) is arranged in a drawable filler basket (14), and the through cylinder (15) is located on the side where the inner rod (5) is installed and in the middle area of ​​the inner cylinder (2).

4. A double-stage vacuum desorption type normal temperature decarbonization tower according to claim 1, characterized in that: The sealing cover (16) at the end of the outer cylinder (1) is detachably connected to the outer cylinder (1), and the V-shaped gas introduction pipe (26) passes through the sealing cover (16) and has the other end opened toward the interior of the inner cylinder (2).

5. The double-stage vacuum desorption type normal temperature decarbonization tower according to claim 1, characterized in that: The remote control valve (25) at the end of the outer cylinder (1) is installed on the sealing cover (16), and the remote control valve (25) is connected to one end of the inlet pipe (27).

6. The double-stage vacuum desorption type normal temperature decarbonization tower according to claim 1, characterized in that: The through-hole cover (28) at the end of the inner cylinder (2) is sealed and connected to the inner cylinder (2).

7. The double-stage vacuum desorption type normal temperature decarbonization tower according to claim 1, characterized in that: The interlayer (3) surrounds the inner tube (2) for a circle, and sealing structures are respectively provided at the upper and lower ends of the interlayer (3) to ensure that gas circulates in the interlayer (3).

8. The double-stage vacuum desorption type normal temperature decarbonization tower according to claim 2, characterized in that: The wave baffles (17) are arranged in an inclined or wave-like manner in the inner cylinder (2), and a gas-liquid interlaced flow space is formed between adjacent wave baffles (17).

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