A rectification column for rectifying high-purity trichloroethane
By optimizing the trichloroethane distillation column through guide plates and support frame structure, the problems of steam loss and purity reduction were solved, achieving high-purity separation and stable connection, and improving the separation effect of trichloroethane.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIFANG HUITAO CHEM
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-07
AI Technical Summary
Existing trichloroethane distillation columns tend to come into vertical contact with the inner wall when steam enters, leading to heat loss and reduced purity.
The system employs a guide plate and support frame structure. The guide plate guides the steam to rise in a parabolic trajectory, reducing contact with the inner wall. The support frame improves the stability of the pipeline. Combined with a rotating rod and gear structure, it achieves effective steam guidance and stable pipeline connection.
It improves the purity of trichloroethane, reduces steam loss, enhances separation efficiency, and improves the stability of pipeline connections.
Smart Images
Figure CN224462287U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of distillation column technology, specifically a distillation column for distilling high-purity trichloroethane. Background Technology
[0002] Trichloroethane is a halogenated hydrocarbon organic compound, a colorless and transparent liquid, insoluble in water but readily soluble in organic solvents such as ethanol and diethyl ether, and is commonly used as a solvent in industry. A trichloroethane distillation column is a specialized chemical equipment used to separate and purify mixtures of trichloroethane (CH3Cl3). Its core function is to separate trichloroethane isomers from impurities through a distillation process.
[0003] In existing technologies, trichloroethane distillation columns typically use sieve tray distillation columns to distill trichloroethane. These columns have sieve plates with mesh sizes of 3-8 mm, arranged in a triangular pattern, and are characterized by their simple structure and low pressure drop. During operation, high-temperature steam generated in the reboiler is introduced into the distillation column through a steam inlet pipe, forming a gas-liquid two-phase flow. This transfers heat to the liquid, and the rising steam drives the gradual enrichment and separation of components between the sieve plates. However, because the steam enters the distillation column and comes into perpendicular contact with the inner wall with a relatively long contact path, some steam loss is likely, leading to a decrease in the purity of the distilled trichloroethane. Summary of the Invention
[0004] The purpose of this invention is to provide a distillation column for refining high-purity trichloroethane to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a distillation column for refining high-purity trichloroethane, comprising a distillation column body, a gas discharge pipe, a liquid discharge pipe, a feed pipe, a steam inlet pipe, a reflux inlet pipe, and a sieve plate, wherein the mesh size of the sieve plate is 3-8 mm and the mesh is arranged in a triangular pattern;
[0006] The top of the distillation column body is connected to a gas discharge pipe for steam discharge, the bottom of the distillation column body is connected to a liquid discharge pipe for trichloroethane liquid discharge, the outer side of the distillation column body is connected to a feed pipe for material inlet, the outer side of the distillation column body is connected to a steam inlet pipe for steam inlet, and the outer side of the distillation column body near the gas discharge pipe is connected to a reflux inlet pipe for reintroducing condensed trichloroethane liquid into the distillation column body. A sieve plate is installed inside the distillation column body, and a rotating rod for rotating a guide plate is movably connected inside the distillation column body near the steam inlet pipe. The guide plate can guide the steam entering the distillation column body. A silicone sealing ring for sealing the distillation column body is sleeved on the outer side of the rotating rod, and a gear for driving the rotating rod to rotate is connected to the outer side of the end of the rotating rod.
[0007] Preferably, a support frame is welded to the outer side of the distillation column body near the gear, and a limit groove is formed on the surface of the support frame. A threaded rod for driving the gear seat to move horizontally is installed on the top of the support frame through a bearing.
[0008] Preferably, the bottom of the gear seat is connected to a guide block, and the guide block and the support frame form a sliding structure through a guide groove, and the gear seat and the gear form a meshing structure.
[0009] Preferably, a U-shaped frame is welded to the outer side of the main body of the distillation column near the feed pipe, steam inlet pipe and reflux inlet pipe, and a U-shaped block and a connecting column are respectively connected to the bottom of the U-shaped frame.
[0010] Preferably, the bottom of the U-shaped block is threadedly connected to a threaded knob for fixing the support plate, the support plate and the connecting column form a rotating structure, and the bottom of the support plate is provided with a threaded groove that matches the size of the threaded knob.
[0011] Preferably, a sliding rod is movably connected inside the U-shaped frame, and a cross plate is connected to the top of the sliding rod.
[0012] Preferably, the bottom of the horizontal plate is connected to a connecting rod for guiding the slide bar, and the connecting rod slides with the U-shaped frame. The top of the horizontal plate is connected to a support base for supporting the feed pipe, steam inlet pipe, and return inlet pipe and their corresponding connecting pipes. The inner side of the support base is bonded with a rubber pad to prevent wear on the bottom of the pipe.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. When this utility model is used, after steam enters the interior of the distillation column through the steam inlet pipe, the guide plate can guide the steam to rise in a parabolic trajectory, making it less likely for the steam to come into vertical contact with the inner wall of the distillation column, thereby reducing component backmixing caused by disordered eddies and improving separation purity. At the same time, the guide plate can reduce steam loss and help improve the purity of trichloroethane.
[0015] 2. The support base can provide auxiliary support for the feed pipe, steam inlet pipe, and return inlet pipe and their corresponding connected pipes, thereby improving the stability of the pipes after connection and preventing sagging or deformation. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0017] Figure 2 This is a three-dimensional cross-sectional structural diagram of the main body of the distillation column of this utility model;
[0018] Figure 3 This is a three-dimensional structural diagram of the sieve plate of this utility model;
[0019] Figure 4 This is a three-dimensional cross-sectional structural diagram of the support frame of this utility model;
[0020] Figure 5 This is a three-dimensional cross-sectional structural diagram of the U-shaped frame of this utility model.
[0021] In the diagram: 1. Main body of the distillation column; 2. Gas discharge pipe; 3. Liquid discharge pipe; 4. Feed pipe; 5. Steam inlet pipe; 6. Reflux inlet pipe; 7. Sieve plate; 8. Rotating rod; 9. Guide plate; 10. Silicone sealing ring; 11. Gear; 12. Support frame; 13. Threaded rod; 14. Gear seat; 15. Limiting block; 16. U-shaped frame; 17. U-shaped block; 18. Connecting column; 19. Threaded knob; 20. Support plate; 21. Sliding rod; 22. Horizontal plate; 23. Connecting rod; 24. Support base; 25. Rubber pad. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Please see Figures 1-4It is understood that this utility model provides a technical solution: a distillation column for refining high-purity trichloroethane, comprising a distillation column body 1, a gas discharge pipe 2, a liquid discharge pipe 3, a feed pipe 4, a steam inlet pipe 5, a reflux inlet pipe 6, and a sieve plate 7, wherein the mesh size of the sieve plate 7 is 3-8 mm, and the mesh is arranged in a triangular pattern; the top of the distillation column body 1 is connected to the gas discharge pipe 2 for steam discharge, the bottom of the distillation column body 1 is connected to the liquid discharge pipe 3 for trichloroethane liquid discharge, the outside of the distillation column body 1 is connected to the feed pipe 4 for adding materials, and the outside of the distillation column body 1 is connected to the steam inlet pipe 5 for steam entry; the distillation column body 1 is located near the gas discharge pipe. The outside of pipe 2 is connected to a reflux inlet pipe 6 for reintroducing the condensed trichloroethane liquid into the body of the distillation column 1. The inside of the body of the distillation column 1 is equipped with a sieve plate 7. The inside of the body of the distillation column 1 near the steam inlet pipe 5 is movably connected to a rotating rod 8 for rotating a guide plate 9. The guide plate 9 can guide the steam entering the body of the distillation column 1 and guide the steam to rise in a parabolic trajectory, thereby reducing the loss of steam after entering the body of the distillation column 1. The outside of the rotating rod 8 is fitted with a silicone sealing ring 10 for sealing the body of the distillation column 1. The outside of the end of the rotating rod 8 is connected to a gear 11 for driving the rotating rod 8 to rotate.
[0024] like Figures 1-4 As shown, a support frame 12 is welded to the outer side of the main body 1 of the distillation column near the gear 11, and a limit groove is opened on the surface of the support frame 12. A threaded rod 13 for driving the gear seat 14 to move horizontally is installed on the top of the support frame 12 through a bearing.
[0025] like Figures 1-4 As shown, a guide block 15 is connected to the bottom of the gear seat 14, and the guide block 15 and the support frame 12 form a sliding structure through the guide groove. The gear seat 14 and the gear 11 form a meshing structure.
[0026] In practice, before the main body 1 of the distillation column is used, the threaded rod 13 can be rotated clockwise. When the threaded rod 13 rotates, it drives the toothed seat 14 to slide in the thread. When the toothed seat 14 moves, it drives the limiting block 15 to slide with the limiting groove. At the same time, the toothed seat 14 can mesh with and drive the gear 11 to rotate, thereby driving the rotating rod 8 to rotate, and then driving the guide plate 9 to rotate counterclockwise. When the limiting block 15 moves to the maximum distance, the guide plate 9 rotates to 45°. At this time, the guide plate 9 can be tilted and fixed inside the main body 1 of the distillation column.
[0027] See Figures 1-4As can be seen, when steam enters the body of the distillation column 1 through the steam inlet pipe 5, the guide plate 9 will guide the steam to rise in a parabolic trajectory, making it less likely for the steam to come into vertical contact with the inner wall of the body of the distillation column 1, thereby reducing the back mixing of components caused by disordered eddies and improving the separation purity. At the same time, the guide plate 9 can reduce steam loss and help improve the purity of trichloroethane.
[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, U-shaped frames 16 are welded to the outer sides of the main body 1 of the distillation column near the feed pipe 4, steam inlet pipe 5 and reflux inlet pipe 6. U-shaped blocks 17 and connecting columns 18 are connected to the bottom of the U-shaped frames 16 respectively. The bottom of the U-shaped blocks 17 is threadedly connected to a threaded knob 19 for fixing the support plate 20. The support plate 20 and the connecting column 18 form a rotating structure, and the bottom of the support plate 20 is provided with a threaded groove that matches the size of the threaded knob 19.
[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, a sliding rod 21 is movably connected inside the U-shaped frame 16. A horizontal plate 22 is connected to the top of the sliding rod 21, and a connecting rod 23 for guiding the sliding rod 21 is connected to the bottom of the horizontal plate 22. The connecting rod 23 and the U-shaped frame 16 slide together. A support seat 24 for supporting the feed pipe 4, steam inlet pipe 5, and return inlet pipe 6 and their corresponding connecting pipes is connected to the top of the horizontal plate 22. The support seat 24 can improve the stability of the feed pipe 4, steam inlet pipe 5, and return inlet pipe 6 after they are connected to their corresponding pipes. A rubber pad 25 for preventing wear on the bottom of the pipe is bonded to the inner side of the support seat 24.
[0030] In practice, the feed pipe 4, steam inlet pipe 5, and reflux inlet pipe 6 on the main body 1 of the distillation column are all connected to corresponding pipes. Since the bottoms of these pipes are usually suspended, the stability of the feed pipe 4, steam inlet pipe 5, and reflux inlet pipe 6 relative to their connected pipes is relatively low. After the feed pipe 4, steam inlet pipe 5, and reflux inlet pipe 6 are all connected and fixed, the corresponding horizontal plate 22 can be pulled towards the upper pipe. When the horizontal plate 22 moves, it causes the sliding rod 21 and connecting rod 23 to slide against the reflux inlet pipe 6, and the horizontal plate 22 also causes the support base 24 and rubber pad 25 to move. When the top of the rubber pad 25 moves to the bottom of the corresponding pipe, the horizontal plate 22 is continuously pulled, which can cause the rubber pad 25 to be squeezed and deformed. At this time, the support plate 20 can be pulled towards the inside of the U-shaped block 17. When the support plate 20 moves, it will rotate through the connecting column 18. When the support plate 20 rotates and moves into the inside of the U-shaped block 17, the threaded knob 19 can be tightened so that the end of the threaded knob 19 can be screwed into the threaded groove, thereby fixing the support plate 20 by threads. At this time, the bottom of the slide rod 21 is located on the top surface of the support plate 20, and the support plate 20 can support the slide rod 21 and the horizontal plate 22.
[0031] See Figure 1 , Figure 2 , Figure 3 and Figure 5 It can be seen that the support base 24 can provide auxiliary support for the feed pipe 4, steam inlet pipe 5 and return inlet pipe 6 and their corresponding connected pipes, thereby improving the stability of the pipes after they are connected and making it less likely for the pipes to sag or deform.
[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A distillation column for refining high-purity trichloroethane, comprising a column body (1), a gas discharge pipe (2), a liquid discharge pipe (3), a feed pipe (4), a steam inlet pipe (5), a reflux inlet pipe (6), and a sieve plate (7), characterized in that: The top of the distillation column body (1) is connected to a gas discharge pipe (2) for steam discharge, the bottom of the distillation column body (1) is connected to a liquid discharge pipe (3) for trichloroethane liquid discharge, the outside of the distillation column body (1) is connected to a feed pipe (4) for material entry, the outside of the distillation column body (1) is connected to a steam inlet pipe (5) for steam entry, the outside of the distillation column body (1) near the gas discharge pipe (2) is connected to a reflux inlet pipe (6) for reintroducing condensed trichloroethane liquid into the distillation column body (1), and a sieve plate (7) is installed inside the distillation column body (1), and the mesh size of the sieve plate (7) is 3-8 mm, and the mesh is arranged in a triangular pattern. The main body (1) of the distillation column is movably connected to a rotating rod (8) for rotating a guide plate (9) near the steam inlet pipe (5). The guide plate (9) can guide the steam entering the main body (1) of the distillation column. A silicone sealing ring (10) for sealing the main body (1) of the distillation column is sleeved on the outside of the rotating rod (8). A gear (11) for driving the rotating rod (8) to rotate is connected to the outside of the end of the rotating rod (8).
2. The distillation column for refining high-purity trichloroethane according to claim 1, characterized in that: The main body (1) of the distillation column is welded with a support frame (12) near the outside of the gear (11), and a limit groove is opened on the surface of the support frame (12). The top of the support frame (12) is equipped with a threaded rod (13) for driving the gear seat (14) to move horizontally via a bearing.
3. The distillation column for refining high-purity trichloroethane according to claim 2, characterized in that: The bottom of the gear seat (14) is connected to a guide block (15), and the guide block (15) and the support frame (12) form a sliding structure through the guide groove. The gear seat (14) and the gear (11) form a meshing structure.
4. The distillation column for refining high-purity trichloroethane according to claim 1, characterized in that: The main body (1) of the distillation column is equipped with U-shaped frames (16) welded to the outside of the feed pipe (4), steam inlet pipe (5) and reflux inlet pipe (6). The bottom of the U-shaped frame (16) is connected to a U-shaped block (17) and a connecting column (18).
5. A distillation column for refining high-purity trichloroethane according to claim 4, characterized in that: The bottom of the U-shaped block (17) is threadedly connected to a threaded knob (19) for fixing the support plate (20). The support plate (20) and the connecting column (18) form a rotating structure, and the bottom of the support plate (20) is provided with a threaded groove that matches the size of the threaded knob (19).
6. The distillation column for refining high-purity trichloroethane according to claim 4, characterized in that: The U-shaped frame (16) is internally connected to a sliding rod (21), and a cross plate (22) is connected to the top of the sliding rod (21).
7. A distillation column for refining high-purity trichloroethane according to claim 6, characterized in that: The bottom of the horizontal plate (22) is connected to a connecting rod (23) for guiding the slide rod (21), and the connecting rod (23) slides with the U-shaped frame (16). The top of the horizontal plate (22) is connected to a support seat (24) for supporting the feed pipe (4), steam inlet pipe (5) and return inlet pipe (6) and their corresponding connecting pipes. The inner side of the support seat (24) is bonded with a rubber pad (25) to prevent wear on the bottom of the pipe.