A structured packing structure for distillation columns

Abstract

The utility model discloses a rectifying column structured packing structure relates to chemical separation equipment technical field. The structure includes a support frame, a plurality of structured packing plate and a pressure ring. The support frame is by the top ring, the support ring and a plurality of as the clamping groove's channel steel support column constitutes. The structured packing plate vertical installation is in the support column, and its characterized in that: the main part of packing plate is oblique wave -shaped, and the opposite direction of adjacent packing plate is opposite, and the alternative arrangement is arranged to the forced gas liquid radial mixing, and its top and bottom are straight up and down vertical wave -shaped, to reduce gas phase import and export resistance. Still have a plurality of through -holes on the packing plate. The utility model discloses through the optimized board type structure and unique arrangement, has the beneficial effect of high mass transfer efficiency, fluid distribution is even, and the pressure drop is low, and the structure is stable, and the installation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of chemical separation equipment technology, and in particular to a structured packing for use in gas-liquid mass transfer equipment such as distillation towers and absorption towers. Background Technology

[0002] Distillation is one of the most important unit operations in chemical production, and its core equipment is the distillation column. The internal components of the column, especially the packing, are key factors determining the separation efficiency, throughput, and operational flexibility of the distillation column. Structured packings are widely used in modern chemical production due to their advantages such as large specific surface area, low pressure drop, high throughput, and high mass transfer efficiency.

[0003] Existing structured packings are mostly monolithic, disc-type wire mesh, or corrugated plate packings, which are inconvenient to install and maintain. Furthermore, during gas-liquid two-phase flow, uneven liquid distribution, channeling, and wall flow are prone to occur, preventing some packing surfaces from being effectively wetted by the liquid. This reduces the effective mass transfer area and affects overall separation efficiency. In addition, the gas phase generates significant inlet and outlet resistance when entering and exiting the packing layer, increasing the overall pressure drop of the tower, limiting the equipment's processing capacity, and increasing energy consumption.

[0004] Therefore, how to design a structured packing structure that is stable, easy to install, and can further improve mass transfer efficiency and reduce flow resistance is a problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a structured packing structure for a distillation column, which aims to solve the problems of low mass transfer efficiency, high gas flow resistance and inconvenient installation and maintenance of structured packing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A structured packing for a distillation column includes: A support frame, comprising a top ring, a support ring, and a plurality of support columns connected between the top ring and the support ring; the support columns are channel steel structures with their concave openings facing inward. Several structured packing plates are vertically arranged side by side in the concave openings of oppositely arranged support columns; the main body of the structured packing plate is obliquely wavy, and its top and bottom ends are both vertically wavy. A pressure ring, which is disposed at the top of the support frame, is used to press the plurality of structured packing plates.

[0007] Preferably, the inclined wavy main body of adjacent regular packing plates has opposite inclination directions and is arranged alternately.

[0008] Preferably, the structured packing plate has several through holes.

[0009] Preferably, the corrugation angle θ of the oblique wavy portion of the structured packing plate is 10~20°.

[0010] Preferably, the peak height h of the corrugated structure of the structured packing plate is 10~15mm, and the wave pitch B is 15~20mm.

[0011] Preferably, the tooth angle β of the corrugated structure of the structured packing plate is 50~60°.

[0012] Preferably, the support columns are arranged symmetrically on the left and right sides within the support frame.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. High mass transfer efficiency and uniform distribution: The main body of the structured packing plate adopts an oblique corrugated design, which greatly increases the effective contact area between the gas and liquid phases. More importantly, the corrugations of adjacent packing plates are arranged in opposite directions and alternately. This structure forces the gas and liquid phases to mix and redistribute laterally (radially) during flow, effectively breaking channeling and wall flow and ensuring uniform gas-liquid distribution across the entire packing layer cross-section. At the same time, the through holes on the plates further promote radial mixing of the liquid, ensuring sufficient wetting of the packing surface and significantly improving mass transfer efficiency.

[0014] 2. Low flow resistance: The top and bottom of the structured packing plate feature a vertically wavy design, providing a smooth inlet and outlet channel for the gaseous medium. This structure effectively reduces the inlet and outlet resistance of the gas phase entering and exiting the packing layer, resulting in a more uniform airflow distribution, thereby reducing the pressure drop of the entire packing layer and lowering equipment energy consumption.

[0015] 3. Stable structure and convenient installation: This utility model adopts a modular design, using a support frame composed of a top ring, a support ring, and support columns to fix the structured packing plates. The support columns are made of channel steel with concave openings facing inwards, allowing the structured packing plates to be easily inserted and accurately positioned. The pressure ring at the top firmly presses all the packing plates together, preventing vibration or displacement during operation. This structure is not only stable and reliable but also greatly simplifies the installation, disassembly, and maintenance process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model (top view); Figure 2 This is a front view of the overall structure of an embodiment of this utility model; Figure 3 This is a top view of the overall structure of an embodiment of this utility model; Figure 4 This is a schematic diagram showing one of the regular packing plates being lifted out of the support frame after the pressure ring is disassembled; Figure 5 This is a schematic diagram showing two structured packing plates being lifted from within the support frame, illustrating the alternating arrangement of the structured packing plates. Figure 6 This is a schematic diagram of the structure of a single structured packing plate; Figure 7 This is a top view of the structured corrugated packing plate, showing its geometric parameters; Figure 8 This is a front view of the regularized packing plate corrugated structure, showing its geometric parameters; Figure 9 This is a structural diagram of the supporting frame; Figure 10 This is a schematic diagram of the overall structure of an embodiment of the present invention (bottom view).

[0017] In the diagram: 1. Structured packing plate; 2. Pressure ring; 3. Top ring; 4. Support ring; 5. Support column; 6. Through hole. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments.

[0019] The description of this utility model is merely a structural or even functional description of the embodiments, and the scope of this utility model is not limited by the embodiments described herein.

[0020] like Figures 1-10 As shown, this embodiment is achieved through the following technical solution: A structured packing structure for a distillation column includes a support frame, several structured packing plates 1, and a pressure ring 2.

[0021] The support frame provides a foundation for the installation and fixation of the structured packing plate 1. The support frame includes a circular top ring 3, a circular support ring 4, and several vertically arranged support columns 5. The support columns 5 are uniformly welded or otherwise fixed between the top ring 3 and the support ring 4, forming a cage-like stable structure. The support columns 5 are made of channel steel, and their concave openings face inwards from the frame, arranged symmetrically from left to right. This design provides standard slots for the installation of the structured packing plate 1.

[0022] The structured packing plate 1 is the core component for realizing gas-liquid mass transfer. In this embodiment, multiple structured packing plates 1 are installed vertically in parallel, with their left and right ends respectively embedded in the concave openings of the channel steel of two opposing support columns 5. A key arrangement feature is that the inclined directions of the wavy main body of adjacent structured packing plates 1 are opposite, forming an alternating arrangement facing left and right. This alternating arrangement can forcibly guide the gas and liquid fluids to mix laterally as they flow through the channels between adjacent plates, greatly improving the radial distribution of the fluid and avoiding localized liquid enrichment or gas short-circuiting, thereby making the mass transfer performance of the entire packing layer more excellent and stable.

[0023] The structure of the structured packing plate 1 is divided into three regions: the central main body is obliquely wavy, while its top and bottom ends are vertically wavy. The obliquely wavy main body is the primary region for gas-liquid two-phase contact and mass transfer. In this preferred embodiment, as... Figure 4 As shown, the corrugation angle θ is 15°, the peak height h is 11.5 mm, the wave pitch B is 19 mm, and the tooth angle β is 54°. These specific geometric parameters have been optimized to achieve the best balance between specific surface area and porosity.

[0024] The vertically oriented corrugated structure at the top and bottom serves to guide and buffer airflow. Before entering the main corrugated body, the rising airflow first passes through the straight corrugated area at the bottom, which helps to distribute the airflow evenly and reduces inlet resistance. Similarly, after leaving the main body area, the airflow flows smoothly out through the straight corrugated area at the top, reducing outlet resistance. This effectively reduces the total pressure drop of the packing layer.

[0025] In addition, the structured packing plate 1 is also uniformly provided with several through holes 6. These through holes 6 allow a portion of the liquid to pass through the plate surface, and work in conjunction with the alternating corrugated structure to further enhance the radial mixing and redistribution of the liquid between adjacent channels, effectively preventing channeling and ensuring that the entire packing surface is effectively wetted.

[0026] The pressure ring 2 is a ring-shaped component whose dimensions match those of the top ring 3. After all the structured packing plates 1 are installed in place, the pressure ring 2 is placed on top of the support frame and secured with bolts or other fasteners. The pressure ring 2 applies downward pressure, firmly pressing the tops of all the structured packing plates 1 into the channel steel of the support column 5, ensuring the compactness and stability of the entire packing structure.

[0027] The working process of this invention is as follows: During distillation column operation, liquid is evenly sprayed from the liquid distributor at the top of the column onto the structured packing structure, flowing downwards along the corrugated surface of the structured packing plate 1 to form a thin film. Gas enters from the bottom of the column and flows upwards in a tortuous manner along the channels between the structured packing plates 1. In the main area of ​​the oblique corrugations, the gas and liquid phases come into full contact in countercurrent flow, transferring heat and mass. Due to the unique structural design of this invention, especially the alternating arrangement of the corrugated plates, the gas-liquid distribution is more uniform, radial mixing is more thorough, and flow resistance is lower, thus achieving a highly efficient and low-consumption separation process.

[0028] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A structured packing for a distillation column, characterized in that, include: The support frame includes a top ring (3), a support ring (4), and several support columns (5) connecting the top ring (3) and the support ring (4); the support columns (5) are channel steel structures with their concave openings facing inward. Several structured packing plates (1) are vertically arranged side by side in the concave opening of the support column (5) with opposite sides; the main body of the structured packing plate (1) is obliquely wavy, and its top and bottom ends are vertically wavy. A pressure ring (2) is disposed at the top of the support frame for pressing the plurality of regular packing plates (1).

2. The structured packing for a distillation column according to claim 1, characterized in that, The inclined wavy main body of the adjacent regular packing plates (1) has opposite inclination directions and is arranged alternately.

3. The structured packing for a distillation column according to claim 1, characterized in that, The structured packing plate (1) has several through holes (6).

4. The structured packing structure for a distillation column according to claim 1, characterized in that, The corrugation angle θ of the oblique wavy part of the structured packing plate (1) is 10~20°.

5. The structured packing for a distillation column according to claim 1, characterized in that, The peak height h of the wavy structure of the structured packing plate (1) is 10~15mm and the wave pitch B is 15~20mm.

6. The structured packing for a distillation column according to claim 1, characterized in that, The tooth angle β of the corrugated structure of the structured packing plate (1) is 50~60°.

7. The structured packing for a distillation column according to claim 1, characterized in that, The support columns (5) are arranged symmetrically on the left and right sides within the support frame.

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