Mid-column feed distributor for packed distillation columns

Abstract

The application discloses a middle section feed distributor for a packed distillation column, comprising a tank body, a feed inlet arranged on the tank body and used for receiving fluid materials inputted from outside, a flow guide channel arranged in the tank body and lower than the feed inlet, so that the fluid entering from the feed inlet can directly fall into the flow guide channel, a converging opening arranged on the flow guide channel, and a drop nozzle connected to the flow guide channel and communicated with the converging opening, the drop nozzle extending to the center line of the tank body, so that the fluid materials can be discharged from the drop nozzle without wall flow phenomenon.

Description

Technical Field

[0001] This application relates to a feed distributor for the middle section of a packed distillation column, which belongs to the field of chemical equipment technology. Background Technology

[0002] Currently, the design of traditional multi-section distillation columns has certain limitations, primarily in that it cannot perform mid-stage feeding operations at specific nodes in the middle of the column. This design flaw not only limits the flexibility and efficiency of the distillation column when processing multiple streams of materials with different compositions, but also leads to wall flow phenomena during mid-stage feeding in actual operation. Wall flow severely affects the gas-liquid distribution within the column, reduces mass and heat transfer efficiency, and consequently affects the distillation effect. Furthermore, when the column height of the distillation column is high, the material, after entering the column, tends to flow down the inner wall of the column due to pre-cooling, failing to effectively enter the packing section of the packed column for sufficient mass and heat transfer. This phenomenon not only wastes energy but also reduces the overall separation performance of the distillation column, making it difficult to meet the demands of modern industry for efficient and energy-saving distillation equipment. Summary of the Invention

[0003] The purpose of this application is to provide a mid-section feed distributor for packed distillation columns, addressing the limitations of current traditional multi-section distillation column designs, primarily the inability to perform mid-section feeding operations at specific nodes in the middle of the column. This design flaw not only restricts the flexibility and efficiency of the distillation column when processing multiple streams of materials with different compositions, but also leads to wall flow problems during mid-section feeding in actual operation.

[0004] The technical problem to be solved in this application is achieved by the following technical solution: A feed distributor for the middle section of a packed distillation column, including: The tank body is provided with a feed inlet for receiving externally input fluid materials; A flow channel is provided inside the tank, and the flow channel is lower than the feed inlet to ensure that the fluid entering from the feed inlet can fall directly into the flow channel. A converging port is provided on the flow channel. A drip nozzle is connected to the flow channel and communicates with the converging port. The drip nozzle extends to the centerline of the tank to ensure that the fluid material exits from the drip nozzle without wall flow.

[0005] Preferably, a cylindrical structure is fixedly connected to the guide channel, and the cylindrical structure is higher than the feed inlet to ensure that the fluid material is blocked by the cylindrical structure and flows into the guide channel.

[0006] Preferably, the diversion channel is set at an angle to the radial cross-section of the tank to ensure that the fluid material can converge to the converging port.

[0007] Preferably, the cylindrical structure is provided with an arc-shaped top, and the sidewall of the cylindrical structure is evenly spaced with a plurality of first air passage holes. The arc-shaped top effectively reduces the upward force of the gaseous material, thereby reducing the gas velocity of the gaseous material and reducing the generation of flooding and mist entrainment.

[0008] Preferably, the cylindrical structure is further provided with a plurality of second air passages, which are evenly spaced along the circumference of the cylindrical structure, and the diameter of the second air passages is larger than the diameter of the first air passages, in order to balance the upward force of the gaseous material.

[0009] Preferably, a valve is installed at the feed inlet, which is used to open or close the flow channel of the fluid material.

[0010] Preferably, the valve comprises: A valve body is installed at the feed inlet, and a feed port 410 is provided on the valve body; The valve core is slidably connected to the valve body and is used to open or close the passage of the feed port 410; A threaded connecting rod is rotatably connected to the valve core, and the threaded connecting rod is threadedly connected to the valve body; The drive rotating part is fixedly connected to the threaded connecting rod.

[0011] Preferably, a bushing is fixedly connected to the valve core, a bearing is installed inside the bushing, and the bearing is connected to the threaded connecting rod.

[0012] Preferably, the drive rotating part is provided with a threaded hole, the threaded connecting rod is provided with a limit groove, and the drive rotating part is fixed by a locking bolt passing through the threaded hole and extending to the limit groove.

[0013] Preferably, a first O-ring is fitted on the valve core, and a second O-ring is fitted on the bushing.

[0014] The beneficial effects of this application are: 1. This application includes a tank body with an inlet for receiving externally input fluid materials; a guide channel, located inside the tank body and lower than the inlet, to ensure that fluid entering from the inlet can directly fall into the guide channel, and a converging port on the guide channel; and a drip nozzle connected to the guide channel and communicating with the converging port, extending to the centerline of the tank body to ensure that fluid materials exit from the drip nozzle without wall flow.

[0015] 2. This application features a cylindrical structure with an arc-shaped top, which provides better structural strength. The cylindrical structure has multiple first air passage holes evenly spaced circumferentially on its sidewalls. The arc-shaped top effectively reduces the upward force of gaseous materials, lowers the gas velocity, and reduces flooding and mist entrainment.

[0016] 3. The valve core approved in this application is fixedly connected to a bushing, and a bearing is installed inside the bushing. The inner ring of the bearing is connected to the threaded connecting rod, ensuring that the seals on the valve core 4 only produce sliding seals and not rotational seals. This design can improve the service life of the seals on the valve core. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present application; Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of this application; Figure 3 This is a cross-sectional structural diagram of Embodiment 2 of this application; Figure 4 This is a three-dimensional structural diagram showing the positional relationship of the valve core, bushing, and threaded connecting rod in this application.

[0018] In the diagram: 1. Tank body; 2. Flow channel; 3. Drip nozzle; 4. Valve; 401. Valve body; 402. Valve core; 403. First O-ring seal; 404. Bushing; 405. Second O-ring seal; 406. Bearing; 407. Threaded connecting rod; 408. Drive rotating part; 409. Threaded hole; 410. Feed port; 5. Cylindrical structure; 6. Rounded top; 7. First air passage; 8. Second air passage. Detailed Implementation

[0019] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this application, the following description, in conjunction with specific illustrations, further elaborates on this application.

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] The following disclosure provides numerous different embodiments or examples for implementing various structures of the embodiments of this application. To simplify the disclosure of the embodiments of this application, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of this application; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in the embodiments of this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0024] like Figure 1-4 As shown, the feed distributor in the middle section of the packed distillation column includes a tank 1, a guide channel 2, and a drip nozzle 3.

[0025] Example 1 Please see, Figure 1 , Figure 2 and Figure 4The tank 1 is specifically equipped with a feed inlet for receiving externally input fluid materials. The tank 1 has a flange structure, which is used to fix it to the upper and lower distillation columns during use. A valve 4 is installed at the feed inlet. Opening or closing the valve 4 controls the flow of the fluid materials, enabling flexible control of the feed. The valve 4 can be a solenoid valve or a manual valve. When using a solenoid valve, it is readily available from the market and is considered prior art. This application uses a manual valve 4 as an example. Specifically, the valve 4 includes a valve body 401, which is welded and fixedly installed at the feed inlet. The valve body 401 has a feed port 410, which is connected to the feed supply end via a pipeline during use. A valve core 402 is slidably connected within the valve body 401, used to open or close the passage of the feed port 410. A threaded connecting rod 407 is rotatably connected to the valve core 402. Specifically, a bushing 404 is fixedly connected to the valve core 402, and a bearing 406 is installed inside the bushing 404. The inner ring of the bearing 406 is connected to the threaded connecting rod 407, ensuring that the seals on the valve core 402 only produce sliding seals and not rotational seals. This design can improve the service life of the seals on the valve core 402. It should be noted that the other end of the bushing 404 is fixedly connected to the valve core 402, such as by welding. Furthermore, the threaded connecting rod 407 is threadedly connected to the internal thread structure provided on the valve body 401; the drive rotating part 408 is provided with a threaded hole 409, the threaded connecting rod 407 is provided with a limiting groove, and the drive rotating part 408 is fixed by a locking bolt passing through the threaded hole 409 and extending to the limiting groove. In order to further improve the sealing performance of the valve 4, a first O-ring seal 403 is fitted on the valve core 402, and a second O-ring seal 405 is fitted on the bushing 404.

[0026] When in use, the operator drives the rotating part 408 to rotate. The threaded connecting rod 407 rotates with the driving rotating part 408. At the same time, the threaded connecting rod 407 moves axially under the action of thread preload, and moves axially with the valve core 402 to open or close the passage of the feed port 410.

[0027] The guide channel 2 is located inside the tank body 1 and is lower than the inlet. This design ensures that the fluid entering from the inlet can fall directly into the guide channel 2. The guide channel 2 is provided with a converging port, and the guide channel 2 is set at an angle to the radial section of the tank body 1. This angle design ensures that the fluid material can smoothly converge to the converging port. The angle described in this application is 5°.

[0028] The drip nozzle 3 is connected to the flow channel 2 and communicates with the converging port. The drip nozzle 3 extends to the center line of the tank body 1 to ensure that the fluid material exits from the drip nozzle 3 without wall flow.

[0029] To prevent excessive fluid pressure from overflowing the guide channel 2, a cylindrical structure 5 is fixedly connected to the guide channel 2. The cylindrical structure 5 is higher than the feed inlet, ensuring that the fluid flows evenly into the guide channel 2 under the obstruction of the cylindrical structure 5. The cylindrical structure 5 is a cylinder with open ends, ensuring that gaseous materials can pass through the cylindrical structure.

[0030] Example 2 Please see, Figure 1 , Figure 3 and Figure 4 The tank 1 is specifically equipped with a feed inlet for receiving externally input fluid materials. The tank 1 has a flange structure, which is used to fix it to the upper and lower distillation columns during use. A valve 4 is installed at the feed inlet. Opening or closing the valve 4 controls the flow of the fluid materials, enabling flexible control of the feed. The valve 4 can be a solenoid valve or a manual valve. When using a solenoid valve, it is readily available from the market and is considered prior art. This application uses a manual valve 4 as an example. Specifically, the valve 4 includes a valve body 401, which is welded and fixedly installed at the feed inlet. The valve body 401 has a feed port 410, which is connected to the feed supply end via a pipeline during use. A valve core 402 is slidably connected within the valve body 401, used to open or close the passage of the feed port 410. A threaded connecting rod 407 is rotatably connected to the valve core 402. Specifically, a bushing 404 is fixedly connected to the valve core 402, and a bearing 406 is installed inside the bushing 404. The inner ring of the bearing 406 is connected to the threaded connecting rod 407, ensuring that the seals on the valve core 402 only produce sliding seals and not rotational seals. This design can improve the service life of the seals on the valve core 402. It should be noted that the other end of the bushing 404 is fixedly connected to the valve core 402, such as by welding. Furthermore, the threaded connecting rod 407 is threadedly connected to the internal thread structure provided on the valve body 401; the drive rotating part 408 is provided with a threaded hole 409, the threaded connecting rod 407 is provided with a limiting groove, and the drive rotating part 408 is fixed by a locking bolt passing through the threaded hole 409 and extending to the limiting groove. In order to further improve the sealing performance of the valve 4, a first O-ring seal 403 is fitted on the valve core 402, and a second O-ring seal 405 is fitted on the bushing 404.

[0031] When in use, the operator drives the rotating part 408 to rotate. The threaded connecting rod 407 rotates with the driving rotating part 408. At the same time, the threaded connecting rod 407 moves axially under the action of thread preload, and moves axially with the valve core 402 to open or close the passage of the feed port 410.

[0032] The guide channel 2 is located inside the tank body 1 and is lower than the inlet. This design ensures that the fluid entering from the inlet can fall directly into the guide channel 2. The guide channel 2 is provided with a converging port, and the guide channel 2 is set at an angle to the radial section of the tank body 1. This angle design ensures that the fluid material can smoothly converge to the converging port. The angle described in this application is 5°.

[0033] The drip nozzle 3 is connected to the flow channel 2 and communicates with the converging port. The drip nozzle 3 extends to the center line of the tank body 1 to ensure that the fluid material exits from the drip nozzle 3 without wall flow.

[0034] To prevent excessive fluid pressure from overflowing the guide channel 2, a cylindrical structure 5 is fixedly connected to the guide channel 2. The cylindrical structure 5 is higher than the feed inlet, ensuring that the fluid flows evenly into the guide channel 2 under the obstruction of the cylindrical structure 5. The cylindrical structure 5 is a cylinder with open ends, ensuring that gaseous materials can pass through the cylindrical structure.

[0035] The cylindrical structure 5 is provided with an arc-shaped top 6, which provides better structural strength. Multiple first airflow holes 7 are evenly spaced circumferentially on the sidewalls of the cylindrical structure 5. The arc-shaped top 6 effectively reduces the upward force of the gaseous material, lowers the gas velocity, and reduces flooding and mist entrainment. The cylindrical structure 5 also has multiple second airflow holes 8, which are evenly spaced circumferentially along the cylindrical structure 5. The second airflow holes 8 are located below the first airflow holes 7, and their diameters are larger than those of the first airflow holes 7, to balance the upward force of the gaseous material. It should be noted that the height of the feed inlet is lower than the height of the second airflow holes 8 to prevent the fluid raw material from being released in large quantities and flowing through the second airflow holes 8 under excessive pressure, thus preventing wall flow.

[0036] The gaseous material rushes upward from the bottom of the lower distillation column. After colliding with the arc-shaped top 6 and reducing the gas velocity, it is evenly distributed to the upper distillation column through the first gas flow hole 7 and the second gas flow hole 8 on the side wall of the cylindrical structure 5. The arc-shaped top 6 effectively reduces the upward force of the gaseous material, thereby reducing the gas velocity of the gaseous material and reducing the generation of flooding and mist entrainment.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this application; all such changes and modifications fall within the scope of the claims. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A feed distributor for the middle section of a packed distillation column, characterized in that, include: The tank body is provided with a feed inlet for receiving externally input fluid materials; A flow channel is provided inside the tank, and the flow channel is lower than the feed inlet to ensure that the fluid entering from the feed inlet can fall directly into the flow channel. A converging port is provided on the flow channel. A drip nozzle is connected to the flow channel and communicates with the converging port. The drip nozzle extends to the centerline of the tank to ensure that the fluid material exits from the drip nozzle without wall flow.

2. The packing distillation column mid-section feed distributor according to claim 1, characterized in that: A cylindrical structure is fixedly connected to the diversion channel. The cylindrical structure is higher than the inlet to ensure that the fluid material is blocked by the cylindrical structure and flows into the diversion channel.

3. The packing distillation column mid-section feed distributor according to claim 2, characterized in that: The diversion channel is set at an angle to the radial section of the tank to ensure that the fluid material can converge to the converging port.

4. The packing distillation column mid-section feed distributor according to claim 3, characterized in that: The cylindrical structure is provided with an arc-shaped top, and the side wall of the cylindrical structure is evenly spaced with multiple first air passage holes. The arc-shaped top effectively reduces the upward force of the gaseous material, thereby reducing the gas velocity of the gaseous material and reducing the generation of flooding and mist entrainment.

5. The packing distillation column mid-section feed distributor according to claim 4, characterized in that: The cylindrical structure is also provided with a plurality of second air passages, which are evenly spaced along the circumference of the cylindrical structure, and the diameter of the second air passages is larger than that of the first air passages, in order to balance the upward force of the gaseous material.

6. The packing distillation column mid-section feed distributor according to any one of claims 1 to 5, characterized in that: A valve is installed at the feed inlet, which is used to open or close the flow channel of the fluid material.

7. The packing distillation column mid-section feed distributor according to claim 6, characterized in that: The valve includes: A valve body is installed at the feed inlet, and the valve body is provided with a feed port; The valve core is slidably connected to the valve body and is used to open or close the passage of the feed port; A threaded connecting rod is rotatably connected to the valve core, and the threaded connecting rod is threadedly connected to the valve body; The drive rotating part is fixedly connected to the threaded connecting rod.

8. The packing distillation column mid-section feed distributor according to claim 7, characterized in that: A bushing is fixedly connected to the valve core, and a bearing is installed inside the bushing, and the bearing is connected to the threaded connecting rod.

9. The packing distillation column mid-section feed distributor according to claim 8, characterized in that: The drive rotating part is provided with a threaded hole, the threaded connecting rod is provided with a limit groove, and the drive rotating part is fixed by a locking bolt passing through the threaded hole and extending to the limit groove.

10. The packing distillation column mid-section feed distributor according to claim 9, characterized in that: The valve core is fitted with a first O-ring seal, and the bushing is fitted with a second O-ring seal.

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