High-purity n-hexane rectification separation tower
By introducing a buffer component into the high-purity n-hexane distillation and separation tower, the problem of gas-liquid disturbance caused by pressure fluctuations was solved, achieving stable system operation and improved safety, and extending equipment life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGYING KANGDI CHEMICAL CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-05-19
AI Technical Summary
Existing high-purity n-hexane distillation equipment is prone to periodic pressure fluctuations when operating for extended periods or handling high-load materials. This leads to increased gas-liquid disturbances, affecting the separation effect. Furthermore, the lack of effective residual pressure management and release mechanisms poses safety hazards.
A high-purity n-hexane distillation and separation tower was designed, which includes a buffer assembly, including a buffer cylinder, guide rod, buffer spring, release hole, connecting pipe, sealing block and reset spring, etc., for automatic buffering and control of pressure fluctuations, and realizing multi-stage pressure relief and orderly gas release.
It effectively buffers pressure fluctuations, ensures stable system operation, reduces the risk of overpressure, improves separation efficiency and equipment safety, extends equipment service life, and enhances system adaptability and safety.
Smart Images
Figure CN224252128U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of distillation and separation equipment technology, and in particular to a high-purity n-hexane distillation and separation tower. Background Technology
[0002] Hexane is a common organic solvent with wide applications in chemical, pharmaceutical, and electronics industries. To meet the purity requirements of different process stages, hexane is typically purified and separated through distillation.
[0003] Existing high-purity n-hexane distillation equipment mostly adopts the traditional tower structure. Although it can basically complete the separation process, when operating for a long time or handling high-load materials, periodic pressure fluctuations often occur inside the system. If buffering and venting are not carried out in time, it can easily lead to aggravated gas-liquid disturbances inside the tower, affecting the separation effect and even causing overpressure risks.
[0004] Furthermore, some devices lack effective residual pressure management and release structures, leading to the disorderly release of high-pressure gases during the distillation process. This not only affects the stability of system operation but also poses certain safety hazards. Additionally, there are no dedicated temporary storage and orderly discharge devices for the gases released after buffering, requiring operators to frequently shut down the system for handling, increasing maintenance costs and labor intensity. Therefore, this invention proposes a high-purity n-hexane distillation separation tower to meet the need for automatic pressure buffering during the distillation process and improve the safety of high-purity n-hexane distillation. Utility Model Content
[0005] In view of this, the purpose of this utility model is to propose a high-purity n-hexane distillation separation tower to solve the problem that if pressure fluctuations occur inside the system and are not buffered and discharged in time, it can easily lead to increased gas-liquid disturbances in the tower, affecting the separation effect and even causing overpressure risk.
[0006] To achieve the above objectives, this utility model provides a high-purity n-hexane distillation separation column, comprising an installation plate, a support frame on one side of the top of the installation plate, a distillation column body disposed within the support frame, a separator disposed at the center of the installation plate, and a finished product box disposed on the other side of the top of the installation plate. The distillation column body, the separator, and the finished product box are sequentially connected by pipelines. A buffer assembly is disposed on one side of the distillation column body; the buffer assembly is used to buffer pressure changes within the distillation column body.
[0007] Preferably, the buffer assembly includes a buffer cylinder that extends through the body of the distillation column. A guide rod is provided on the inner wall of one end of the buffer cylinder. The guide rod is telescopic and has a moving head at one end. The moving head fits against the inner wall of the buffer cylinder. A buffer spring is sleeved on the guide rod. One end of the buffer spring is located at one end of the buffer cylinder, and the other end of the buffer spring is located on one side of the moving head.
[0008] Preferably, the buffer cylinder has multiple sets of release holes, and the inner diameter of the release holes is arranged in a stepped manner.
[0009] Preferably, a support plate is provided on the main body of the distillation column, an extension tube is provided through the support plate, a storage bladder is threaded on the extension tube, the storage bladder is in a retractable state, a discharge valve is provided at the bottom of the storage bladder, a connecting pipe is provided at the top of the extension tube, the connecting pipe is in a hollow state, and the connecting pipe is connected to the release hole through a pipeline.
[0010] Preferably, a limiting ring is provided on the inner wall of the connecting pipe, a sealing block is slidably disposed inside the limiting ring, a moving rod is provided on the top of the sealing block, the top of the moving rod is conical, a return spring is sleeved on the moving rod, one end of the return spring is disposed on the limiting ring, and the other end of the return spring is disposed on one side of the moving rod.
[0011] Preferably, a positioning ring is provided at the bottom of the sealing block, and one end of the positioning ring is in contact with the limiting ring.
[0012] The beneficial effects of this utility model are:
[0013] 1. After the raw material enters the distillation column, it undergoes a fractionation process, with light and heavy components gradually separated. The light components are then transported via pipelines to a centrally located separator for further purification. Finally, high-purity n-hexane is transported to a finished product tank at the top of the mounting plate for collection. A buffer assembly is installed on one side of the distillation column to buffer pressure fluctuations within the column, ensuring relatively stable internal pressure and maintaining normal separation efficiency and process continuity. By installing the buffer assembly, internal pressure changes caused by gas-liquid flow fluctuations or load variations during distillation can be effectively addressed, reducing the risk of system overpressure or sudden changes and extending equipment lifespan.
[0014] 2. When the pressure inside the column increases, the gas pushes the moving head to compress the buffer spring along the guide rod, allowing the buffer spring to absorb excess pressure. Through the cooperation of the buffer spring and the moving head, the pressure changes inside the distillation column can be effectively buffered, avoiding equipment damage or process interruption due to sudden pressure increases. At the same time, the multiple sets of release holes on the buffer cylinder have a stepped increasing aperture design. The release holes adopt a stepped inner diameter design, which can automatically select the opening path according to the internal pressure, realizing multi-stage pressure relief control, enhancing the system's adaptability and safety, and helping to improve the continuity and stability of the distillation process.
[0015] 3. When the gas released from the buffer assembly enters the connecting pipe along the pipeline, it pushes the sealing block, which is slidably installed inside the limiting ring on the inner wall of the connecting pipe. When the gas pressure rises to a certain level, it pushes the sealing block upward, and the released gas enters the extension pipe and expands into the storage bladder, achieving orderly buffering and temporary storage. As the pressure drops, the return spring causes the sealing block and the moving rod to return to their original positions, re-sealing the pipeline and preventing gas backflow. The cooperation between the connecting pipe, the sealing block, and the return spring enables automatic opening and closing, ensuring that the system responds sensitively and seals reliably during gas pressure fluctuations. The positioning ring at the bottom of the sealing block contacts the limiting ring during the return process, achieving precise positioning and sealing. When the set pressure or operating time is reached, the gas can be released through the exhaust valve at the bottom of the storage bladder. At this time, the gas in the storage bladder can be recovered or treated, improving the safety and stability of the distillation system and enhancing the intelligent management capability of residual pressure, which is conducive to the long-term stable operation of the equipment. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the present invention;
[0018] Figure 2 This is a schematic diagram of the buffer component of this utility model;
[0019] Figure 3 This is a partial cross-sectional view of the buffer cylinder of this utility model;
[0020] Figure 4 This is a schematic diagram of the connecting pipe of this utility model;
[0021] Figure 5 This is a partial cross-sectional view of the limiting ring of this utility model.
[0022] The following are marked in the diagram: 1. Mounting plate; 2. Support frame; 3. Distillation column body; 4. Separator; 5. Finished product box; 6. Buffer cylinder; 7. Support plate; 8. Guide rod; 9. Moving head; 10. Buffer spring; 11. Release hole; 12. Connecting pipe; 13. Extension pipe; 14. Storage bladder; 15. Moving rod; 16. Restriction ring; 17. Sealing block; 18. Positioning ring; 19. Return spring. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.
[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0025] like Figures 1-5 As shown, a high-purity n-hexane distillation separation column includes a mounting plate 1, a support frame 2 is provided on one side of the top of the mounting plate 1, a distillation column body 3 is provided inside the support frame 2, a separator 4 is provided at the center of the mounting plate 1, and a finished product tank 5 is provided on the other side of the top of the mounting plate 1. The distillation column body 3, the separator 4 and the finished product tank 5 are connected in sequence by pipes. A buffer assembly is provided on one side of the distillation column body 3; the buffer assembly is used to buffer pressure changes inside the distillation column body 3.
[0026] After the raw material enters the main body 3 of the distillation column, it undergoes a fractionation process, with light and heavy components gradually separated. The light components are further purified by entering the separator 4 located in the center via pipelines. Finally, the high-purity n-hexane is transported to the finished product box 5 at the top of the mounting plate 1 for collection. A buffer component is provided on one side of the main body 3 of the distillation column, which can buffer pressure fluctuations in the column in a timely manner to ensure that the internal pressure of the system remains relatively stable, thereby maintaining normal separation efficiency and process continuity. By setting up the buffer component, the internal pressure changes caused by gas-liquid flow fluctuations or load changes during the distillation process can be effectively dealt with, reducing the risk of system overpressure or sudden changes and extending the service life of the equipment.
[0027] like Figures 1-3 As shown, the buffer assembly includes a buffer cylinder 6 that runs through the body of the distillation column 3. A guide rod 8 is provided on the inner wall of one end of the buffer cylinder 6. The guide rod 8 is telescopic and has a moving head 9 at one end. The moving head 9 fits against the inner wall of the buffer cylinder 6. A buffer spring 10 is sleeved on the guide rod 8. One end of the buffer spring 10 is located at one end of the buffer cylinder 6, and the other end of the buffer spring 10 is located on one side of the moving head 9. The buffer cylinder 6 has multiple sets of release holes 11, and the inner diameter of the release holes 11 increases in a stepped manner.
[0028] When the pressure inside the column increases, the gas pushes the moving head 9 to compress the buffer spring 10 along the guide rod 8. The buffer spring 10 absorbs the excess pressure. Through the cooperation of the buffer spring 10 and the moving head 9, the pressure change inside the distillation column body 3 can be effectively buffered, avoiding equipment damage or process interruption due to sudden pressure increase. At the same time, the multiple sets of release holes 11 on the buffer cylinder 6 have a stepped increasing aperture design. The release holes 11 adopt a stepped inner diameter design, which can automatically select the opening path according to the internal pressure, realize multi-stage pressure relief control, enhance the adaptability and safety of the system, and help improve the continuity and stability of the distillation process.
[0029] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, a support plate 7 is provided on the distillation column body 3, and an extension tube 13 is provided through the support plate 7. A storage bladder 14 is threaded on the extension tube 13. The storage bladder 14 is in a retractable state and a discharge valve is provided at the bottom of the storage bladder 14. A connecting tube 12 is provided at the top of the extension tube 13. The connecting tube 12 is in a hollow state and is connected to the release hole 11 through a pipe. A limiting ring 16 is provided on the inner wall of the connecting tube 12. A sealing block 17 is slidably provided inside the limiting ring 16. A moving rod 15 is provided at the top of the sealing block 17. The top of the moving rod 15 is conical. A return spring 19 is sleeved on the moving rod 15. One end of the return spring 19 is provided on the limiting ring 16, and the other end of the return spring 19 is provided on one side of the moving rod 15. A positioning ring 18 is provided at the bottom of the sealing block 17. One end of the positioning ring 18 is in contact with the limiting ring 16.
[0030] When the gas released from the buffer assembly enters the connecting pipe 12 along the pipeline, it pushes the sealing block 17, which is slidably set inside the limiting ring 16 on the inner wall of the connecting pipe 12. When the gas pressure rises to a certain level, it pushes the sealing block 17 to move upward, and the released gas enters the extension pipe 13 and expands into the storage bladder 14, realizing orderly buffering and temporary storage. As the pressure drops, the return spring 19 causes the sealing block 17 and the moving rod 15 to return to their original positions, re-sealing the pipeline and preventing gas backflow. The cooperation between the connecting pipe 12, the sealing block 17, and the return spring 19 can realize the automatic opening and closing function, ensuring that the system responds sensitively and the sealing is reliable during gas pressure fluctuations. The positioning ring 18 set at the bottom of the sealing block 17 contacts the limiting ring 16 during the return process, realizing precise positioning and sealing. When the set pressure or operating time is reached, the gas can be released through the exhaust valve at the bottom of the storage bladder 14. At this time, the gas in the storage bladder 14 can be recovered or treated, which improves the safety and stability of the distillation system and enhances the intelligent management capability of residual pressure, which is conducive to the long-term stable operation of the equipment.
[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.
[0032] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A high-purity n-hexane distillation and separation column, comprising a mounting plate (1), characterized in that, A support frame (2) is provided on one side of the top of the mounting plate (1), and a distillation column body (3) is provided inside the support frame (2). A separator (4) is provided at the center of the mounting plate (1), and a finished product box (5) is provided on the other side of the top of the mounting plate (1). The distillation column body (3), the separator (4) and the finished product box (5) are connected in sequence by pipes. A buffer assembly is provided on one side of the distillation column body (3). The buffer assembly is used to buffer pressure changes within the body of the distillation column (3).
2. The high-purity n-hexane distillation and separation column according to claim 1, characterized in that, The buffer assembly includes a buffer cylinder (6) that runs through the body of the distillation column (3). A guide rod (8) is provided on the inner wall of one end of the buffer cylinder (6). The guide rod (8) is a telescopic structure. A moving head (9) is provided at one end of the guide rod (8). The moving head (9) is in contact with the inner wall of the buffer cylinder (6). A buffer spring (10) is sleeved on the guide rod (8). One end of the buffer spring (10) is located at one end of the buffer cylinder (6), and the other end of the buffer spring (10) is located on one side of the moving head (9).
3. A high-purity n-hexane distillation and separation column according to claim 2, characterized in that, The buffer cylinder (6) has multiple sets of release holes (11), and the inner diameter of the release holes (11) is arranged in a stepped manner.
4. A high-purity n-hexane distillation and separation column according to claim 3, characterized in that, The distillation column body (3) is provided with a support plate (7), and an extension tube (13) is provided through the support plate (7). A storage bladder (14) is threaded on the extension tube (13). The storage bladder (14) is in a retractable state. A discharge valve is provided at the bottom of the storage bladder (14). A connecting pipe (12) is provided at the top of the extension tube (13). The connecting pipe (12) is in a hollow state. The connecting pipe (12) is connected to the release hole (11) through a pipe.
5. A high-purity n-hexane distillation and separation column according to claim 4, characterized in that, A limiting ring (16) is provided on the inner wall of the connecting pipe (12). A sealing block (17) is slidably provided inside the limiting ring (16). A moving rod (15) is provided on the top of the sealing block (17). The top of the moving rod (15) is conical. A return spring (19) is sleeved on the moving rod (15). One end of the return spring (19) is provided on the limiting ring (16), and the other end of the return spring (19) is provided on one side of the moving rod (15).
6. A high-purity n-hexane distillation and separation column according to claim 5, characterized in that, The bottom of the sealing block (17) is provided with a positioning ring (18), one end of which is in contact with the limiting ring (16).