A packing fixing structure for a distillation column used for the purification of benzofuranone

Abstract

This utility model discloses a packing fixing structure for a distillation column used in the purification of benzofuranone, relating to the field of distillation column technology. It includes a packing fixing frame with three evenly distributed support plates at the bottom. A support plate is fixedly connected between the three support plates, and a lifting mechanism and a packing limiting assembly are arranged above the support plate. This utility model uses annular baffles to limit the packing periphery, combined with radially distributed reinforcing strips and evenly arranged limiting rods, to support and reinforce the gaps between the packing materials. This prevents the packing from loosening, shifting, or deforming due to airflow impact and liquid level fluctuations during distillation, ensuring the stability of the packing layer structure. The lifting mechanism (threaded rod, threaded sleeve, and operating handle) allows for flexible adjustment of the height of the packing limiting assembly, accommodating different packing volumes and facilitating space adjustment during packing installation, replacement, or maintenance.

Description

Technical Field

[0001] This utility model relates to the field of distillation column technology, and in particular to a packing fixing structure for a distillation column used for the purification of benzofuranone. Background Technology

[0002] In the field of distillation column technology, packing material serves as the core carrier for gas-liquid two-phase mass transfer, and its stability directly affects distillation efficiency and the purification effect of target products (such as benzofuranone). Traditional distillation columns often employ a fixed packing structure, constraining the packing material with fixed support plates and pressure plates. However, this type of structure has the following problems:

[0003] 1. Insufficient packing stability: Traditional structures rely heavily on external baffles or single pressure plates to limit the packing's position, making it difficult to effectively support the gaps within the packing layer. During the purification of benzofuranone, the gas flow velocity and liquid level fluctuate frequently in the distillation column. The packing is prone to loosening, displacement, or deformation due to impact, resulting in uneven packing density. Locally excessive density hinders gas-liquid flow, while locally insufficient density reduces the mass transfer contact area, ultimately affecting the purification purity and efficiency of benzofuranone.

[0004] 2. Poor adaptability and low operational flexibility: The height of the fixed structure is not adjustable, making it unable to adapt to different packing volumes. When it is necessary to replace the packing, adjust the packing volume, or perform maintenance, part of the structure must be dismantled for operation, which is not only time-consuming and labor-intensive, but may also damage the original structure of the packing layer during the dismantling process, increasing the cost of secondary adjustments.

[0005] To address this, we designed a packing fixing structure for a distillation column used for the purification of benzofuranone. Utility Model Content

[0006] This utility model discloses a packing fixing structure for a distillation column used in the purification of benzofuranone. To achieve the above objective, this utility model adopts the following technical solution:

[0007] A packing fixing structure for a distillation column used for purifying benzofuranone includes a packing fixing frame. Three supporting base plates are evenly arranged at the bottom of the packing fixing frame. A supporting plate is fixedly connected between the three supporting base plates. A lifting mechanism and a packing limiting component are arranged above the supporting plate. The lifting mechanism is used to lift and adjust the height of the packing limiting component.

[0008] The lifting mechanism includes a threaded rod rotatably connected to the upper surface of the support plate, and a threaded sleeve is threadedly connected to the surface of the threaded rod. The packing limiting assembly includes a limiting base plate fixedly connected to the bottom end of the threaded sleeve. Several reinforcing strips are fixedly provided on the upper surface of the limiting base plate, and several limiting rods are evenly distributed on the upper surface of the reinforcing strips. Several gas-liquid holes are opened on the surface of the limiting base plate.

[0009] In a preferred embodiment, an annular baffle is fixedly connected to the upper surface of the limiting chassis. The size of the annular baffle matches the inner diameter of the packing fixing frame. The packing fixing frame is circular in shape, and the outer ring surface of the annular baffle is slidably connected to the inner wall of the packing fixing frame.

[0010] In a preferred embodiment, the annular baffle is used to limit the periphery of the packing material, a plurality of reinforcing strips are radially and evenly distributed on the surface of the limiting chassis, and a plurality of limiting rods are linearly arrayed and evenly distributed on the surface of the reinforcing strips. The limiting rods are used to support and reinforce the gaps between the packing materials.

[0011] In a preferred embodiment, the lifting mechanism further includes three guide slides fixed to the upper surface of the packing fixing frame. An L-shaped mounting plate is fixedly connected to the top of each guide slide. The surface of the L-shaped mounting plate is provided with bolt fixing holes, and the L-shaped mounting plate is fixedly installed on the inner wall of the distillation column by bolts.

[0012] In a preferred embodiment, three fixing blocks are fixedly connected to the upper surface of the annular baffle, and guide sliders are fixedly connected to the surfaces of the three fixing blocks. The surfaces of the guide sliders are provided with sliding through holes that match the guide rods, and the guide sliders slide up and down on the surfaces of the guide rods through the sliding through holes.

[0013] In a preferred embodiment, an operating handle is fixedly connected to the top of the threaded rod, and a through hole is provided at the center of the upper surface of the limiting base. The through hole is located directly below the threaded sleeve, and the size of the through hole matches the threaded rod.

[0014] As can be seen from the above, the packing fixing structure inside the distillation column for benzofuranone purification provided by this utility model has the following technical effects.

[0015] 1. Strong packing stability, adaptable to different filling requirements: The annular baffle limits the perimeter of the packing, while radially distributed reinforcing strips and evenly arranged limiting rods provide support and reinforcement for the gaps between the packing layers. This prevents the packing from loosening, shifting, or deforming due to airflow impact and liquid level fluctuations during distillation, ensuring the stability of the packing layer structure. The height of the packing limiting components can be flexibly adjusted using a lifting mechanism to accommodate different packing volumes, while also facilitating space adjustment during packing installation, replacement, or maintenance.

[0016] 2. High gas-liquid flow efficiency, ensuring purification effect: The gas-liquid holes on the surface of the limiting base provide ample flow channels for the gas and liquid phases, reducing obstruction to the gas-liquid mass transfer path in the distillation column, ensuring uniform gas-liquid contact and passage through the packing layer, and avoiding local liquid accumulation or poor airflow that could affect the purification efficiency of benzofuranone. Attached Figure Description

[0017] Figure 1 This is a Z-shaped front view schematic diagram of the packing fixing structure inside a distillation column for purifying benzofuranone, as proposed in this utility model.

[0018] Figure 2 This is a schematic diagram of the packing limiting component of the packing fixing structure in the distillation column for purifying benzofuranone, as proposed in this utility model, in the rising state.

[0019] Figure 3 This is a bottom view structural diagram of the packing fixing structure inside a distillation column for purifying benzofuranone, as proposed in this utility model.

[0020] Figure 4 for Figure 1 Enlarged structural diagram at point A in the middle.

[0021] In the attached diagram: 1. Packing material fixing frame; 2. Support base plate; 3. Support plate; 4. Lifting mechanism; 5. Packing material limiting assembly;

[0022] Threaded rod; 402, threaded sleeve; 403, guide slide bar; 404, L-shaped mounting plate; 405, fixing block; 406, guide slider; 407, operating handle;

[0023] 501. Limiting chassis; 502. Reinforcing strip; 503. Limiting rod; 504. Gas-liquid hole; 506. Annular baffle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Reference Figures 1-4 The packing fixing structure for benzofuranone purification disclosed in this embodiment is mainly used to stabilize and fix the packing in the distillation column, while ensuring smooth flow of the gas and liquid phases, adapting to the operating conditions required in the benzofuranone purification process. Its core structure includes a packing fixing frame 1, a supporting base plate 2, a supporting plate 3, a lifting mechanism 4, and a packing limiting assembly 5. The connection relationships and functions of each structure are as follows:

[0026] Connection between the packing fixing frame 1 and the supporting base plate 2: The packing fixing frame 1 is circular in shape and forms the basic framework of the entire structure. At the bottom of the packing fixing frame 1, three supporting base plates 2 are evenly distributed. One end of each supporting base plate 2 is fixedly connected to the inner wall of the packing fixing frame 1, and the other end extends towards the center of the packing fixing frame 1. This distribution method evenly distributes the weight of the packing and the overall structure onto the packing fixing frame 1, preventing excessive local stress that could lead to deformation.

[0027] Installation position of support plate 3: Support plate 3 is fixedly connected between the three support base plates 2. Support plate 3 is located at the bottom inner side of the packing fixing frame 1, and its edge is tightly fixed to the extended ends of the three support base plates 2. Support plate 3 not only provides a stable installation base for the lifting mechanism 4 above, but also provides auxiliary support for the bottom packing, preventing the packing from leaking out from the bottom gaps and improving the overall load-bearing stability of the structure.

[0028] The lifting mechanism 4 is installed above the support plate 3 and is used to drive the filler limiting assembly 5 to achieve height adjustment. It mainly consists of a threaded rod 401, a threaded sleeve 402, a guide slide rod 403, an L-shaped mounting plate 404, a fixing block 405, a guide slider 406, and an operating handle 407.

[0029] The threaded rod 401 and threaded sleeve 402 are fitted together: the bottom end of the threaded rod 401 is rotatably connected to the center of the upper surface of the support plate 3, and the surface of the threaded rod 401 is threadedly connected to the inner wall of the threaded sleeve 402. The bottom end of the threaded sleeve 402 is fixedly connected to the limiting base 501 in the packing limiting assembly 5. When the threaded rod 401 rotates, the threaded sleeve 402 can move up and down along the axial direction of the threaded rod 401, thereby driving the packing limiting assembly 5 to rise and fall synchronously. This threaded transmission structure has high adjustment accuracy and can achieve stable positioning at any height, adapting to different packing filling requirements.

[0030] Connection between guide rods 403 and L-shaped mounting plate 404: Three guide rods 403 are evenly distributed on the upper surface of the packing fixing frame 1. The bottom ends of the three guide rods 403 are all fixed perpendicularly to the upper surface of the packing fixing frame 1, and the top ends are connected to the L-shaped mounting plate 404. One side surface of the L-shaped mounting plate 404 is fixed to the top ends of the three guide rods 403, and the other side surface has bolt fixing holes. The entire structure can be fixed to the inner wall of the distillation column by passing bolts through the fixing holes. The design of the L-shaped mounting plate 404 not only achieves a firm connection between the structure and the distillation column, but also improves the impact resistance of the overall structure through the support of the three guide rods 403, and avoids structural displacement caused by airflow vibration during the distillation process.

[0031] The cooperation between the guide slider 406 and the fixed block 405: On the upper surface of the annular baffle 506, three fixed blocks 405 are fixedly connected to the positions corresponding to the three guide rods 403. A guide slider 406 is fixedly connected to the outer surface of each fixed block 405. The surface of the guide slider 406 is provided with a sliding through hole, which matches the shape of the guide rod 403. The guide slider 406 is sleeved on the surface of the guide rod 403 through the sliding through hole and can slide up and down along the axial direction of the guide rod 403.

[0032] The cooperation between the guide slider 406 and the guide rod 403 can strictly constrain the lifting direction of the packing limiting component 5, preventing it from radially deviating during the lifting process due to the rotation of the threaded rod 401. This ensures that the packing limiting component 5 always moves in the vertical direction, guaranteeing its concentricity with the packing fixing frame 1. This design can prevent the annular baffle 506 from rubbing and jamming against the inner wall of the packing fixing frame 1, and at the same time prevent the packing from being locally squeezed and deformed due to the deviation of the limiting component.

[0033] Installation position of operating handle 407: The operating handle 407 is fixedly connected to the top of the threaded rod 401. The operating handle 407 is located above the L-shaped mounting plate 404, making it convenient for operators to operate from the inspection port or observation port of the distillation column. By rotating the operating handle 407, the threaded rod 401 can be directly driven to rotate without additional tools, simplifying the height adjustment operation process and improving the efficiency of packing replacement and maintenance.

[0034] Assembly and positional relationship of packing limiting component 5: The packing limiting component 5 is the core structure that directly fixes the packing. It is installed at the bottom end of the threaded sleeve 402 and moves synchronously with the lifting and lowering of the threaded sleeve 402. It is mainly composed of limiting base plate 501, reinforcing strip 502, limiting rod 503, gas-liquid hole 504 and annular baffle 506.

[0035] Position and connection of the limiting base 501: The limiting base 501 is a circular flat plate structure, and its center is fixedly connected to the bottom end of the threaded sleeve 402. A through hole is provided at the center of the upper surface of the limiting base 501. This through hole is located directly below the threaded sleeve 402 and its size matches that of the threaded rod 401. When the threaded sleeve 402 lowers the limiting base 501, the threaded rod 401 can pass through this through hole, avoiding obstruction to the movement of the limiting base 501 and ensuring that the limiting base 501 can be lowered to a position close to the support plate 3, adapting to the fixing requirements of a small amount of filler.

[0036] The annular baffle 506 and the packing fixing frame 1 are fitted together: An annular baffle 506 is fixedly connected to the edge of the upper surface of the limiting base 501. The outer ring surface of the annular baffle 506 fits against the inner wall of the packing fixing frame 1 and can slide up and down along the inner wall of the packing fixing frame 1. The main function of the annular baffle 506 is to limit the periphery of the packing, prevent the packing from diffusing to the edge under the impact of airflow, and avoid gaps at the edge of the packing layer. This design ensures that the overall density of the packing layer is uniform, reduces gas-liquid short-circuiting, and ensures the mass transfer efficiency during the purification of benzofuranone. The structural design has no unnecessary obstructing parts, and the lifting adjustment does not change the flow area of ​​the gas-liquid hole 504, thus maintaining a stable gas-liquid throughput rate.

[0037] Distribution of reinforcing strips 502 and limiting rods 503: Several reinforcing strips 502 are fixedly installed on the upper surface of the limiting chassis 501. These reinforcing strips 502 are evenly distributed radially (extending towards the annular baffle 506 with the center of the limiting chassis 501 as the origin), and both ends of the reinforcing strips 502 are fixedly connected to the central area of ​​the limiting chassis 501 and the inner wall of the annular baffle 506, respectively. This radial distribution not only enhances the structural strength of the limiting chassis 501 and prevents it from bending due to the weight of the filler, but also provides auxiliary constraint on the radial distribution of the filler layer.

[0038] On the upper surface of each reinforcing strip 502, several limiting rods 503 are evenly distributed along the length direction, extending upward perpendicularly to the reinforcing strip 502. The limiting rods 503 can be inserted into the gaps between the packing materials to provide longitudinal support for the packing materials, preventing them from accumulating and deforming due to their own weight or airflow impact. In conjunction with the peripheral limiting of the annular baffle 506, the limiting rods 503 can enhance the structural stability from within the packing layer, ensuring that the packing materials always maintain the preset mass transfer contact area.

[0039] On the surface of the limiting chassis 501, several gas-liquid holes 504 are formed in the area between the reinforcing strips 502. These gas-liquid holes 504 are evenly distributed in the non-reinforced area of ​​the limiting chassis 501, providing a flow channel for the gas and liquid phases during the distillation process. This design reduces the obstruction of the limiting chassis 501 to the gas-liquid mass transfer path, ensuring uniform gas-liquid flow through the packing layer and preventing localized liquid accumulation or poor airflow from affecting the purification effect of benzofuranone. Simultaneously, the gas-liquid holes 504 are positioned away from the reinforcing strips 502, ensuring flow efficiency without weakening the structural strength of the limiting chassis 501.

[0040] Working principle: In use, the entire structure is first fixed to the designated position on the inner wall of the distillation column using the L-shaped mounting plate 404, ensuring that the packing fixing frame 1 is concentric with the distillation column. According to the packing amount, the operating handle 407 is turned to drive the threaded rod 401 to rotate. At this time, the threaded sleeve 402 drives the packing limiting assembly 5 to move upward along the guide slide rod 403 until sufficient packing space is left between the limiting base 501 and the support plate 3.

[0041] Fill the filling material into the filling fixing frame 1. The filling material accumulates under the support of the support plate 3. At this time, the inner side of the annular baffle 506 and the area between the reinforcing strips 502 are filled with filling material. After filling is completed, rotate the operating handle 407 in the opposite direction to move the filling material limiting component 5 downward until the limiting rod 503 is inserted into the filling gap and the annular baffle 506 is in contact with the outer periphery of the filling material. At this time, the filling material is firmly fixed between the limiting base plate 501 and the support plate 3, and the density of the filling material layer is uniform.

[0042] During distillation, the gas and liquid phases rise from below the packing layer, enter the packing layer through the gaps in the support plate 3, and continue to flow upward after mass transfer through the packing, passing through the gas-liquid holes 504 on the limiting base 501 to enter the upper space. During this process, the annular baffle 506 and the limiting rod 503 effectively prevent packing displacement, and the gas-liquid holes 504 ensure smooth gas-liquid flow. If packing adjustment or maintenance is required, simply turn the operating handle 407 again to raise the packing limiting assembly 5 for quick operation.

[0043] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A fixed structure of packing in a rectifying column for the purification of benzofuranones, comprising a packing fixing frame (1), characterized in that, The bottom of the packing fixing frame (1) is evenly provided with three supporting base plates (2), and a supporting plate (3) is fixedly connected between the three supporting base plates (2). A lifting mechanism (4) and a packing limiting component (5) are provided above the supporting plate (3). The lifting mechanism (4) is used to lift and adjust the height of the packing limiting component (5). The lifting mechanism (4) includes a threaded rod (401) rotatably connected to the upper surface of the support plate (3). The threaded rod (401) is threadedly connected to a threaded sleeve (402). The packing limiting assembly (5) includes a limiting base (501) fixedly connected to the bottom end of the threaded sleeve (402). Several reinforcing strips (502) are fixedly provided on the upper surface of the limiting base (501). Several limiting rods (503) are evenly distributed on the upper surface of the reinforcing strips (502). Several gas-liquid holes (504) are opened on the surface of the limiting base (501).

2. The fixed structure of the packing of the rectifying column for the purification of the benzofuranone according to claim 1, characterized by, An annular baffle (506) is fixedly connected to the upper surface of the limiting chassis (501). The size of the annular baffle (506) matches the inner diameter of the packing fixing frame (1). The packing fixing frame (1) is in the shape of a ring. The outer ring surface of the annular baffle (506) is slidably connected to the inner wall of the packing fixing frame (1).

3. The packing structure for a distillation column for the purification of benzofuranone according to claim 2, characterized in that, The annular baffle (506) is used to limit the periphery of the packing. Several reinforcing strips (502) are radially and evenly distributed on the surface of the limiting chassis (501). Several limiting rods (503) are linearly arrayed and evenly distributed on the surface of the reinforcing strips (502). The limiting rods (503) are used to support and reinforce the gaps between the packings.

4. The packing structure for a distillation column for the purification of benzofuranone according to claim 3, characterized in that, The lifting mechanism (4) also includes three guide slide rods (403) fixed on the upper surface of the packing fixing frame (1). The top of the guide slide rod (403) is fixedly connected to an L-shaped mounting plate (404). The surface of the L-shaped mounting plate (404) is provided with bolt fixing holes, and the L-shaped mounting plate (404) is fixedly installed on the inner wall of the distillation column by bolts.

5. The packing fixing structure in a distillation column for purifying benzofuranone according to claim 4, characterized in that, Three fixing blocks (405) are fixedly connected to the upper surface of the annular baffle (506). Guide sliders (406) are fixedly connected to the surfaces of the three fixing blocks (405). The surface of the guide sliders (406) is provided with sliding through holes that match the guide rods (403). The guide sliders (406) slide up and down on the surface of the guide rods (403) through the sliding through holes.

6. The packing structure for a distillation column for the purification of benzofuranone according to claim 5, wherein An operating handle (407) is fixedly connected to the top of the threaded rod (401). A through hole is provided at the center of the upper surface of the limiting base (501). The through hole is located directly below the threaded sleeve (402), and the size of the through hole matches that of the threaded rod (401).

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