Novel rectifying tower reboiler device for high-purity carbon dioxide
By using an empty bath structure and a wing tube design in the carbon dioxide distillation tower again, the problem of circulating water frozen in low water flow or obstruction of the traditional device is solved, and a more efficient and stable heat exchange process is achieved. Reduce safety risks and maintenance costs.
Patent Information
- Application Number
- CN202323499195.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2033-12-21
AI Technical Summary
In the case of low water flow or blockage in traditional carbon dioxide distillation tower reboilers, the circulating water may freeze and cause freezing, which poses safety risks and risks of equipment damage.
Designed a new type of high -purity carbon dioxide refractory tower and re -boiling device. It adopts an empty bath structure and a wing tube design to avoid dependence on circulating water. Adjust the heat exchange process through the thermal insulation shell and the converter structure.
Effectively avoid the risk of circulating water freezing, reduce equipment damage and safety risks, improve heat exchange efficiency and stability, and reduce maintenance costs and dependence on water systems.
Smart Images
Figure CN222400286U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of carbon dioxide purification, in particular to a novel distillation tower reboiler device for high-purity carbon dioxide. Background Art
[0002] CO2 distillation is a separation process based on the physical properties of CO2 at different pressures and temperatures. First, the gas mixture is compressed to increase its pressure, and then cooled to liquefy or solidify the CO2, thereby separating it from the other gases. This technology is widely used in the food industry, for example, in the manufacture of carbonated beverages; in the medical field as a medicinal gas; and in the pharmaceutical industry for the production of drugs and the preparation of laboratory reagents. Because it can provide high-purity CO2, it can meet strict purity requirements in various applications.
[0003] The traditional reboiler of the carbon dioxide distillation tower uses a jacketed heat exchanger in series with the distillation tower to maintain heat exchange between the circulating water in the reboiler and the carbon dioxide. However, there are some problems with this design. In the case of low water flow or blockage, the circulating water may freeze during the low-temperature distillation of carbon dioxide (about -50°C), causing the circulating water pipes and the distillation tower to freeze and possibly crack. Even when the reboiler does not need to work or the working time is short, the circulating water may freeze. This situation is very unfavorable for the carbon dioxide distillation process, which may cause safety hazards and damage equipment. Therefore, it is necessary to design a new type of high-purity carbon dioxide distillation tower reboiler device that can solve the problem of circulating water freezing. Utility Model Content
[0004] (I) Technical problems solved: In view of the deficiencies in the prior art, the utility model provides a novel high-purity carbon dioxide distillation tower reboiler device, which has the advantages of not causing freezing and cracking of the distillation tower during the distillation process, the heat exchange rate can be adjusted according to the distillation conditions, energy saving, simple installation and low cost. It solves the problem that in the case of low water flow or blockage in the traditional carbon dioxide distillation tower reboiler, the circulating water may freeze during the low-temperature distillation of carbon dioxide, causing the circulating water pipeline and the distillation tower to freeze and possibly freeze and crack.
[0005] (II) Technical solution: In order to achieve the above-mentioned purpose of not causing the distillation tower to freeze and crack during the distillation process, the heat exchange rate can be adjusted according to the distillation situation, energy is saved, and the installation is simple and cost-effective, the utility model provides the following technical solution: a new type of high-purity carbon dioxide distillation tower reboiler device, including a distillation tower, a liquid outlet pipe, and a liquid inlet pipe, one end of the liquid outlet pipe is arranged at the bottom of the distillation tower, one end of the liquid inlet pipe is arranged on the outer wall of the bottom of the distillation tower, the other end of the liquid outlet pipe is connected to the reboiler bottom cover, and the other end of the liquid inlet pipe is connected to the bottom cover of the reboiler. The reboiler is connected to the top cover of the reboiler, the top of the reboiler bottom cover is rotatably connected with a sealing cover 1, a cavity 1 is arranged between the reboiler top cover and the sealing cover 1, the bottom of the reboiler top cover is rotatably connected with a sealing cover 2, a cavity 2 is arranged between the reboiler bottom cover and the sealing cover 2, two or more fin tubes are arranged between the sealing cover 1 and the sealing cover 2, the bottom end of the fin tube passes through the sealing cover 1 and is connected with the cavity 1, and the top end of the fin tube passes through the sealing cover 2 and is connected with the cavity 2.
[0006] Preferably, a heat-insulating shell is sleeved between the sealing cover 1 and the sealing cover 2, and a ventilation pipe for introducing heat exchange gas into the heat-insulating shell is opened on the heat-insulating shell.
[0007] Preferably, a transmission belt is connected to an outer wall of the sealing cover, the other end of the transmission belt is connected to a driving motor, and the top of the driving motor is fixedly connected to a fixing frame.
[0008] Preferably, a fixed base is provided at the bottom of the fixing frame.
[0009] Preferably, two or more fin tubes are arranged in an array along the circumferential direction of the sealing cover 1, and the number of the fin tubes increases along the diameter of the sealing cover 1.
[0010] Preferably, a sealing structure is provided between the sealing cover 1 and the bottom cover of the reboiler and between the sealing cover 2 and the top cover of the reboiler respectively.
[0011] (III) Beneficial effects: Compared with the prior art, the utility model provides a novel high-purity carbon dioxide distillation tower reboiler device, which has the following beneficial effects:
[0012] 1. This is a new type of high-purity carbon dioxide distillation tower reboiler device. Through the use of finned tube junctions and distillation tower structures, compared with traditional technical structures, this reboiler avoids the risk of circulating water freezing caused by insufficient water flow or blockage in traditional reboilers. Since the air bath structure does not rely on water flow, the possibility of circulating water freezing can be reduced, thereby reducing equipment damage and safety risks. At the same time, the air bath structure uses finned tubes and other designs to increase the heat exchange surface area, which helps to improve heat exchange efficiency and stability. This design makes the reboiling process more controllable and uniform, which is conducive to maintaining stable operation of the equipment. Compared with traditional reboilers that require maintenance of water circulation systems, the air bath structure may reduce maintenance costs, reduce dependence on water systems, and reduce the time and cost required for maintenance and management.
[0013] 2. This novel high-purity carbon dioxide distillation tower reboiler device uses a sealing cover structure, a driving motor, and a conveyor belt structure in combination. Compared with the traditional technical structure, when the sealing cover of the reboiler drives the fin tube to rotate, its movement can make the surface of the fin tube contact with the surrounding air more frequently, increase the heat exchange surface area, help to transfer more heat, improve the heat exchange efficiency, and the reboiling efficiency of the overall equipment will also be improved. Effective heat transfer will help to achieve the reboiling process more quickly, improve the efficiency and performance of carbon dioxide distillation, and at the same time, such movement can break the potential thermal boundary layer, so that heat can be more effectively transferred to the surrounding air.
[0014] 3. This new type of high-purity carbon dioxide distillation tower reboiler device uses an insulation shell structure and a ventilation pipe structure. Compared with the traditional technical structure, the reboiler covers the fin tubes and the surrounding of the reboiler through the design of the insulation shell, which can reduce heat loss and improve the temperature stability of the heat exchange area. This stability helps to maintain the equipment within the required operating temperature range and improve the heat exchange efficiency. At the same time, the cavity in the insulation shell allows the introduction of heat exchange gases of different temperatures through the ventilation pipe, which helps to control the temperature of the surrounding environment during the heat exchange process and ensure the required heat exchange effect. By controlling the gas in the environment, the temperature of the heat exchange area can be adjusted more accurately to improve the heat exchange efficiency and stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a three-dimensional structural schematic diagram of a novel high-purity carbon dioxide distillation tower reboiler device of the utility model;
[0016] Figure 2 This is a structural front view of a novel high-purity carbon dioxide distillation tower reboiler device of the utility model;
[0017] Figure 3 It is a partial cross-sectional view of the finned tube structure of a novel high-purity carbon dioxide distillation tower reboiler device of the utility model;
[0018] Figure 4 The utility model is a three-dimensional structural schematic diagram of a novel high-purity carbon dioxide distillation tower reboiler device when the insulation shell is disassembled.
[0019] In the figure: 1-distillation tower, 2-liquid outlet pipe, 3-liquid inlet pipe, 4-reboiler bottom cover, 5-reboiler top cover, 6-sealing cover one, 7-cavity one, 8-sealing cover two, 9-cavity two, 10-fin tube, 11-insulation shell, 12-ventilation pipe, 13-transmission belt, 14-drive motor, 15-fixed frame, 16-fixed base, 17-sealing structure. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] See also Figure 1 and Figure 3 A novel high-purity carbon dioxide distillation tower reboiler device comprises a distillation tower 1, a liquid outlet pipe 2, and a liquid inlet pipe 3. One end of the liquid outlet pipe 2 is arranged at the bottom of the distillation tower 1, and one end of the liquid inlet pipe 3 is arranged on the outer wall of the bottom of the distillation tower 1. The other end of the liquid outlet pipe 2 is connected to the reboiler bottom cover 4, and the other end of the liquid inlet pipe 3 is connected to the reboiler top cover 5. The carbon dioxide after heat exchange flows back to the distillation tower 1 from the liquid inlet pipe 3. The top of the reboiler bottom cover 4 is rotatably connected to a sealing cover 6. There is a sealing cover 6 between the reboiler top cover 5 and the sealing cover 6. A cavity 7 is provided, a sealing cover 28 is rotatably connected to the bottom of the reboiler top cover 5, a cavity 29 is provided between the reboiler bottom cover 4 and the sealing cover 28, two or more fin tubes 10 are provided between the sealing cover 16 and the sealing cover 28, the bottom end of the fin tube 10 passes through the sealing cover 16 and is connected to the cavity 17, the top end of the fin tube 10 passes through the sealing cover 28 and is connected to the cavity 29, and the low-temperature carbon dioxide liquid enters the cavity 17 from the liquid outlet pipe 2, and enters the fin tube 10 from the cavity 17 for heat exchange. The purpose of setting the fin tube 10 is to increase the heat exchange surface area and improve the heat exchange efficiency. The existence of the fin tube 10 can increase the contact area between the air and the low-temperature carbon dioxide, thereby more effectively transferring heat and promoting the reboiling process of the carbon dioxide liquid. The design of the fin tube 10 enables the liquid to diffuse on its surface, increases the contact area between the liquid and the tube wall, and improves the heat transfer rate. In this way, through the heat exchange effect of the fin tube 10, the low-temperature carbon dioxide liquid can absorb the surrounding heat more quickly and finally achieve the reboiling process.
[0022] See also Figure 1 and Figure 3 An insulation shell 11 is sleeved between the sealing cover 1 6 and the sealing cover 2 8. The cavity in the insulation shell 11 covers all the fin tubes 10. A ventilation pipe 12 is opened on the insulation shell 11 to pass the heat exchange gas into the insulation shell 11. Heat exchange is completed by passing heat exchange gases of different heat into the insulation shell 11 through the ventilation pipe 12. By covering the fin tubes 10 and the surroundings of the reboiler with the insulation shell 11, heat loss can be reduced and the temperature of the heat exchange area can be kept stable. At the same time, the cavity in the insulation shell 11 allows the passage of heat exchange gases of different heat. The gas of the required temperature can be introduced into the insulation shell 11 through the ventilation pipe 12 to control the temperature of the surrounding environment during the heat exchange process and ensure the required heat exchange effect. The design of the insulation shell 11 can also effectively prevent the gas after heat exchange from leaking out, providing a closed environment to ensure that the heat exchange process is not affected by the outside world and remains stable.
[0023] See also Figure 2 and Figure 4 A transmission belt 13 is connected to the outer wall of the sealing cover 6, and the other end of the transmission belt 13 is connected to a driving motor 14, and a fixing frame 15 is fixedly connected to the top of the driving motor 14. When the driving motor 14 drives the conveyor belt to rotate, the sealing cover 6 will drive the finned tube 10 above to rotate. When the sealing cover 6 drives the finned tube 10 to rotate, its movement can make the surface of the finned tube 10 contact with the surrounding air more frequently, increase the heat exchange surface area, help to transfer more heat, improve the heat exchange efficiency, and improve the reboiling efficiency of the overall equipment. Effective heat transfer will help to achieve the reboiling process more quickly and improve the efficiency and performance of carbon dioxide distillation. At the same time, such movement can break the potential thermal boundary layer, so that heat can be more effectively transferred to the surrounding air. A fixed base 16 is provided at the bottom of the fixing frame 15. Two or more finned tubes 10 are arranged in an array along the circumferential direction of the sealing cover 6, and the number of finned tubes 10 increases as the diameter of the sealing cover 6 increases, such as Figure 4 As shown, a sealing structure 17 is provided between the sealing cover 1 6 and the bottom cover 4 of the reboiler and between the sealing cover 2 8 and the top cover 5 of the reboiler, respectively. The sealing structure 17 can prevent leakage of carbon dioxide.
[0024] Working principle: Low-temperature carbon dioxide liquid flows out of the distillation tower 1 through the liquid inlet pipe 3 into the cavity 7 between the bottom cover 4 and the sealing cover 6 of the reboiler, and enters the finned tube 10 from the cavity 7 for heat exchange. The existence of the finned tube 10 increases the heat exchange surface area, and through its surface diffusion and the contact between the liquid and the tube wall, the heat transfer rate is increased, which promotes the reboiling process of the low-temperature carbon dioxide liquid. The carbon dioxide reboiled by the finned tube 10 will flow back into the cavity 9 and return to the distillation tower 1 again through the liquid inlet pipe 3 to complete the reboiling heating process of the carbon dioxide.
[0025] The outer wall of the sealing cover 6 is connected with a transmission belt 13. When the transmission belt 13 is driven to rotate by the driving motor 14, the transmission belt drives the sealing cover 6 and the fin tube 10 above to rotate. This rotation increases the contact frequency between the surface of the fin tube 10 and the surrounding air, further increases the heat exchange surface area, and improves the heat transfer efficiency.
[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A novel high-purity carbon dioxide distillation tower reboiler device, comprising a distillation tower (1), a liquid outlet pipe (2), and a liquid inlet pipe (3), wherein one end of the liquid outlet pipe (2) is arranged at the bottom of the distillation tower (1), and one end of the liquid inlet pipe (3) is arranged on the outer wall of the bottom of the distillation tower (1), characterized in that: The other end of the liquid outlet pipe (2) is connected to the reboiler bottom cover (4), and the other end of the liquid inlet pipe (3) is connected to the reboiler top cover (5). The top of the reboiler bottom cover (4) is rotatably connected to a sealing cover 1 (6). A cavity 1 (7) is provided between the reboiler top cover (5) and the sealing cover 1 (6). The bottom of the reboiler top cover (5) is rotatably connected to a sealing cover 2 (8). A cavity 2 (9) is provided between the reboiler bottom cover (4) and the sealing cover 2 (8). A fin tube (10) is provided between the sealing cover 1 (6) and the sealing cover 2 (8). The bottom end of the fin tube (10) passes through the sealing cover 1 (6) and is connected to the cavity 1 (7), and the top end of the fin tube (10) passes through the sealing cover 2 (8) and is connected to the cavity 2 (9).
2. A novel high-purity carbon dioxide distillation tower reboiler device according to claim 1, characterized in that: A heat-insulating shell (11) is sleeved between the first sealing cover (6) and the second sealing cover (8), and a ventilation pipe (12) is provided on the body of the heat-insulating shell (11) for introducing heat-exchanging gas into the heat-insulating shell (11).
3. The novel high-purity carbon dioxide distillation tower reboiler device according to claim 1, characterized in that: A transmission belt (13) is connected to the outer wall of the sealing cover (6), the other end of the transmission belt (13) is connected to a driving motor (14), and the top of the driving motor (14) is fixedly connected to a fixing frame (15).
4. A novel high-purity carbon dioxide distillation tower reboiler device according to claim 3, characterized in that: A fixing base (16) is provided at the bottom of the fixing frame (15).
5. The novel high-purity carbon dioxide distillation tower reboiler device according to claim 1, characterized in that: Two or more fin tubes (10) are arranged in an array along the circumferential direction of the sealing cover (6), and the number of the fin tubes (10) increases as the diameter of the sealing cover (6) increases.
6. The novel high-purity carbon dioxide distillation tower reboiler device according to claim 1, characterized in that: A sealing structure (17) is provided between the first sealing cover (6) and the bottom cover (4) of the reboiler, and between the second sealing cover (8) and the top cover (5) of the reboiler.