A distillation column level control device
Patent Information
- Application Number
- CN202522314409.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-10-31
AI Technical Summary
Existing distillation column level control devices suffer from deviations in level gauge readings due to fluctuations in the bottom liquid level, affecting the accuracy of level control.
A liquid level control device including a manifold, a guide pipe, and a diversion pipe was designed. The manifold collects liquid substances, and the guide pipe and diversion pipe disperse the liquid substances to below the liquid surface of the bottom liquid, avoiding impact on the bottom liquid and ensuring the monitoring accuracy of the float body.
This effectively avoids fluctuations in the liquid level at the bottom of the tower, ensures the monitoring accuracy of the level gauge, and achieves stable control of the liquid level at the bottom of the tower.
Smart Images
Figure CN224925627U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of distillation column technology, specifically to a distillation column liquid level control device. Background Technology
[0002] Maintaining a stable liquid level in the reboiler of a distillation column is essential for maintaining column pressure and reflux ratio. Fluctuations in the reboiler level can lead to imbalances in material and energy balance within the column, thereby affecting product purity and yield. A distillation column level control device can monitor the reboiler level in real time using a level gauge and adjust the inlet and outlet valves to control the feed and discharge flow rates, thus ensuring a stable reboiler level.
[0003] In some existing distillation column level control devices, the level gauge is directly installed inside the column bottom. During the distillation process, there is a continuous flow of medium falling into the column bottom. This falling medium impacts the liquid at the bottom of the column, causing fluctuations in the liquid level. Consequently, the measurement data from the level gauge deviates, affecting the monitoring accuracy of the level gauge and reducing the working accuracy of the level control device. Therefore, a distillation column level control device is proposed to address the above problems. Utility Model Content
[0004] The purpose of this invention is to provide a distillation column level control device to solve the problem that the measurement data of the level gauge is deviated due to the fluctuation of the liquid level at the bottom of the column in some existing distillation column level control devices.
[0005] To achieve the above objectives, this utility model provides the following technical solution: A distillation column level control device includes a support assembly, a distillation column body, and a level detection assembly. The distillation column body includes a column body. A liquid inlet pipe is fixedly connected to the left opening of the column body, and a liquid inlet valve is installed on the liquid inlet pipe. An air inlet pipe is fixedly connected to the lower right opening of the column body, and an air inlet valve is installed on the air inlet pipe. A drain pipe is fixedly connected to the lower opening of the column body, and a drain valve is installed on the drain pipe. A float support is fixedly connected inside the column body. A float body is slidably connected to the outside of the float support. A manifold plate is fixedly connected to the inner wall of the column body on the upper side of the float support. A guide pipe is fixedly connected to the lower opening of the manifold plate, and a set of circumferentially distributed and connected branch pipes are fixedly connected to the outside of the guide pipe.
[0006] Preferably, the support assembly includes a mounting base, a fixing frame is provided above the mounting base, a set of circumferentially distributed support legs are fixedly connected to the lower end face of the fixing frame, the lower ends of the support legs are all fixedly connected to the mounting base, and the inner side of the fixing frame is fixedly connected to the tower body.
[0007] Preferably, an exhaust pipe is fixedly connected to the upper opening of the tower body, and a return pipe is fixedly connected to the upper right opening of the tower body.
[0008] Preferably, the manifold is a funnel-shaped disc with an opening in the middle, and the guide pipe is a circular pipe with an opening at the top and a closed bottom.
[0009] Preferably, the lowermost side of the guide tube has a set of circumferentially distributed openings, and the diversion tubes are all horizontally distributed and staggered from the float support.
[0010] Compared with the prior art, the beneficial effects of this utility model are: In this invention, the device, through the configured manifold, guide pipe, and branch pipe, can collect the liquid phase material produced by distillation through the manifold and disperse the liquid phase material below the surface of the bottom liquid through the guide pipe and branch pipe. The liquid phase material will only have a small lateral impact on the bottom liquid, so the liquid level of the bottom liquid will not fluctuate. This device can avoid the impact of the liquid phase material falling during the distillation process on the bottom liquid, avoid the fluctuation of the liquid level of the bottom liquid, ensure the monitoring accuracy of the float body, and thus better control the liquid level of the bottom liquid. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 3 This is a schematic cross-sectional view of the distillation column body of this utility model; Figure 4 This is a cross-sectional view of the liquid level detection component of this utility model; Figure 5 This is a cross-sectional view of the manifold structure of this utility model.
[0012] In the diagram: 1. Support assembly; 11. Mounting base; 12. Fixing frame; 13. Support leg; 2. Distillation column body; 21. Column body; 22. Liquid inlet pipe; 23. Liquid inlet valve; 24. Gas inlet pipe; 25. Gas inlet valve; 26. Liquid outlet pipe; 27. Liquid outlet valve; 28. Exhaust pipe; 29. Reflux pipe; 3. Liquid level detection assembly; 31. Float support; 32. Float body; 33. Manifold; 34. Guide pipe; 35. Diverter pipe. Detailed Implementation
[0013] 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.
[0014] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.
[0015] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0016] Please see Figure 1-5 This utility model provides a technical solution: A distillation column level control device includes a support assembly 1, a distillation column body 2, and a level detection assembly 3. The distillation column body 2 includes a column body 21. A liquid inlet pipe 22 is fixedly connected to the left opening of the column body 21 and is equipped with a liquid inlet valve 23. An air inlet pipe 24 is fixedly connected to the lower right opening of the column body 21 and is equipped with an air inlet valve 25. A drain pipe 26 is fixedly connected to the lower opening of the column body 21 and is equipped with a drain valve 27. A float support 31 is fixedly connected inside the column body 21. A float body 32 is slidably connected to the outside of the float support 31. A manifold 33 is fixedly connected to the upper side of the float support 31 and is fixedly connected to the inner wall of the column body 21. A guide pipe 34 is fixedly connected to the lower opening of the manifold 33 and is fixedly connected to the outside of the guide pipe 34. A set of circumferentially distributed and interconnected branch pipes 35 are fixedly connected to the outside of the guide pipe 34.
[0017] The support assembly 1 includes a mounting base 11, with a fixing frame 12 above the mounting base 11. A set of circumferentially distributed support legs 13 are fixedly connected to the lower end of the fixing frame 12, and the lower ends of the support legs 13 are all fixedly connected to the mounting base 11. The inner side of the fixing frame 12 is fixedly connected to the tower body 21, and the fixing frame 12 can support the tower body 21. An exhaust pipe 28 is fixedly connected to the upper opening of the tower body 21, and a return pipe 29 is fixedly connected to the upper right opening of the tower body 21. The reflux pipe 29 allows the refluxed material to re-enter the column body 21; the manifold 33 is a funnel-shaped disc with an opening in the middle; the guide pipe 34 is a circular pipe with an opening at the top and a closed bottom; the liquid phase material produced by distillation can be collected through the manifold 33; a set of circumferentially distributed openings are opened on the lowest side of the guide pipe 34; the branch pipes 35 are all horizontally distributed and staggered from the float support 31; the liquid phase material can be dispersed and discharged below the liquid surface of the bottom liquid through the branch pipes 35 without impacting the float support 31.
[0018] Workflow: Before use, install the mounting base 11 in a suitable position and connect the power supply to the device. The device is equipped with an external controller, which is electrically connected to the inlet valve 23, the air inlet valve 25, the drain valve 27, and the float body 32. Manual operation of the external controller can adjust the operating status of the inlet valve 23, the air inlet valve 25, the drain valve 27, and the float body 32. The tower body 21 of the device can be equipped with trays or packing. The tower body 21 of the device needs to be used in conjunction with a reboiler, a condenser, and a separator. The lower end of the drain pipe 26 is connected to the inlet of the reboiler through a pipe. The outlet of the reboiler and the liquid addition mechanism are both connected to the inlet pipe 22 through pipes. The gas-feeding mechanism is connected to the inlet pipe 24 via a pipe, the upper end of the exhaust pipe 28 is connected to the inlet of the condenser via a pipe, the outlet of the condenser is connected to the inlet of the separator, and the outlet of the separator is connected to the return pipe 29 via a pipe. All of the above are existing technologies. When using this device, the operator first opens the liquid inlet valve 23 and the gas inlet valve 25 via an external controller, and then injects liquid and gaseous raw materials into the liquid inlet pipe 22 and the gas inlet pipe 24 respectively through the liquid-feeding mechanism and the gas-feeding mechanism. The raw materials can then be distilled through the tower body 21. The gaseous substances produced by distillation are discharged from the tower body 21 through the exhaust pipe 28, condensed by the condenser, and separated by the separator. The separated products can be collected by the material receiving unit. The residual product is collected and returned to the column body 21 through the reflux pipe 29. Simultaneously, the liquid phase produced by distillation falls onto the manifold 33, enters the distribution pipe 35 through the guide pipe 34, and is then discharged through the distribution pipe 35. The distribution pipes 35 are all horizontally distributed and located below the bottom liquid surface. By dispersing the liquid phase into the bottom liquid through the distribution pipes 35, the bottom liquid can be replenished. The horizontally flowing liquid does not cause vertical impact on the bottom liquid, and the horizontal impact of the liquid dispersed through multiple distribution pipes 35 on the bottom liquid is minimal. Therefore, the liquid level at the bottom does not fluctuate, and the liquid level can be accurately measured through the float body 32 on the float support 31. The external controller can adjust the opening and closing of the inlet valve 23, the air inlet valve 25, and the drain valve 27 according to the liquid level of the bottom liquid, so that the liquid level of the bottom liquid is maintained within a specific range. The device can collect the liquid phase material produced by distillation through the manifold 33, and disperse the liquid phase material to the bottom liquid below the liquid level through the guide pipe 34 and the branch pipe 35. The liquid phase material will only have a small lateral impact on the bottom liquid, so the liquid level of the bottom liquid will not fluctuate. The device can avoid the impact of the liquid phase material falling during the distillation process on the bottom liquid, avoid the liquid level of the bottom liquid from fluctuating, ensure the monitoring accuracy of the float body 32, and thus better control the liquid level of the bottom liquid.
[0019] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can all be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.
[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A distillation column level control device, comprising a support assembly (1), a distillation column body (2), and a level detection assembly (3), characterized in that: The distillation column body (2) includes a column body (21). A liquid inlet pipe (22) is fixedly connected to the left opening of the column body (21), and a liquid inlet valve (23) is installed on the liquid inlet pipe (22). An air inlet pipe (24) is fixedly connected to the lower right opening of the column body (21), and an air inlet valve (25) is installed on the air inlet pipe (24). A drain pipe (26) is fixedly connected to the lower opening of the column body (21), and a drain pipe (26) is installed on the drain pipe (26). There is a drain valve (27). A float support (31) is fixedly connected inside the tower body (21). A float body (32) is slidably connected to the outside of the float support (31). A manifold (33) is fixedly connected to the inner wall of the tower body (21) on the upper side of the float support (31). A guide pipe (34) is fixedly connected to the lower opening of the manifold (33). A set of circumferentially distributed and connected branch pipes (35) is fixedly connected to the outside of the guide pipe (34).
2. The distillation column level control device according to claim 1, characterized in that: The support assembly (1) includes a mounting base (11), a fixing frame (12) is provided above the mounting base (11), and a set of circumferentially distributed support legs (13) are fixedly connected to the lower end face of the fixing frame (12). The lower ends of the support legs (13) are all fixedly connected to the mounting base (11), and the inner side of the fixing frame (12) is fixedly connected to the tower body (21).
3. The distillation column level control device according to claim 1, characterized in that: An exhaust pipe (28) is fixedly connected to the upper opening of the tower body (21), and a return pipe (29) is fixedly connected to the upper right opening of the tower body (21).
4. The distillation column level control device according to claim 1, characterized in that: The manifold (33) is a funnel-shaped disc with an opening in the middle, and the guide pipe (34) is a circular pipe with an opening at the top and a closed bottom.
5. The distillation column level control device according to claim 1, characterized in that: The lowermost side of the guide pipe (34) has a set of circumferentially distributed openings, and the diversion pipes (35) are all horizontally distributed and staggered from the float support (31).