A composite type three-dimensional mass transfer tray

Abstract

The application provides a composite three-dimensional mass transfer tray, comprising a tray plate, a vertical plate arranged on the tray plate, wing plates connected to the two sides of the vertical plate, a cover plate arranged on the top of the vertical plate, fixed valves arranged on the cover plate, and sieve holes arranged on the tray plate and the wing plates; the combination of the wing plates, the cover plate and the vertical plate is adopted in the application, so that the combination of the three kinds of tray plates, i.e., the tray plate (sieve plate tray), the three-dimensional mass transfer tray and the fixed valve tray, is realized, the mass transfer efficiency is effectively increased, the entrainment of mist is better intercepted, the entrainment of mist of the tray plate is reduced, the separation efficiency of the tray plate is improved, and the tray plate has better anti-blocking performance.

Description

Technical Field

[0001] This application relates to the field of chemical equipment technology, specifically to a composite three-dimensional mass transfer tray. Background Technology

[0002] The development and production of the chemical industry cannot be separated from the continuous development and progress of towers and their internal components. Among them, tower internals play a crucial role, especially in terms of tower separation efficiency and tower pressure drop control. Therefore, the form and structure of tower internals are also the focus of research.

[0003] Currently, the main types of towers are packed towers and plate towers. Plate towers come in various forms, including sieve trays, cap trays, and valve trays. Each type of plate tower has its applicable fields and its own advantages and disadvantages.

[0004] 1. Sieve trays have a simple structure but limited operational flexibility and low mass transfer efficiency for processes with large liquid-to-gas ratios. 2. Cap trays offer high operational flexibility and are less prone to clogging, but their complex structure, high cost, and lower production capacity and tray efficiency, coupled with a fixed slit opening, make them unsuitable for changes in steam load. At low steam velocities, gas-liquid contact is poor, while at high velocities, steam can easily blow away the liquid. 3. Valve trays offer greater operational flexibility, better adaptability to feed rate changes, better gas-liquid agitation, less mist entrainment, longer contact time, and better mass transfer. However, the steam ejects along the periphery of the rising steam vents, resulting in counter-current liquid mixing, which reduces mass transfer efficiency.

[0005] In summary, while three-dimensional mass transfer trays offer high mass transfer efficiency and operational flexibility, there is still significant room for improvement. In chemical production, some areas are height-restricted, requiring trays with even higher efficiency to achieve the desired effect within the effective height. To address these needs, our company, based on a thorough understanding and application of three-dimensional mass transfer trays, and combining the advantages of various tray types, proposes to invent a composite three-dimensional mass transfer tray that can improve efficiency and possess numerous other advantages.

[0006] Based on the above approach, the applicant conducted a detailed search of the prior art, and obtained the following prior art:

[0007] Application number CN200720311334.6 describes a composite tray, providing a technical solution including solid valves and floating valves, which are evenly arranged at intervals of 1:0.2-9. Compared with floating valve trays, this invention increases operational flexibility and reduces costs; compared with simple solid valve trays, it significantly increases operational flexibility and broadens the application range of solid valves. The aforementioned composite tray has the advantages of both solid and floating valves. However, this application only sets the solid and floating valves on the tray in proportion, without connecting or combining them. For some chemical production applications with highly restricted areas, the efficiency is improved compared to solid or floating valves, but there is still room for improvement, and it is completely different from the inventive concept of this application.

[0008] During the search, no patent documents related to the inventive points of this application were found.

[0009] In summary, a new technical solution is needed to address the aforementioned technical problems. Summary of the Invention

[0010] This application provides a composite three-dimensional mass transfer tray, including a tray, a vertical plate on the tray, wing plates connected to both sides of the vertical plate, a cover plate on the top of the vertical plate, a solid valve on the cover plate, and sieve holes on both the tray and the wing plates.

[0011] As a preferred embodiment, the wing plate is a flat wing plate or an arc-shaped wing plate.

[0012] As a preferred embodiment, a bending plate is provided at the edge of the flat wing plate.

[0013] As a preferred embodiment, the bending plate and the lower end face of the flat wing plate are provided with an included angle α, where 90° < α < 180°.

[0014] As a preferred embodiment, the wing plate is a regular corrugated plate with crests and troughs.

[0015] As a preferred embodiment, the wing plate is arranged horizontally or at an angle on the upright plate.

[0016] As a preferred embodiment, the top surface of the vertical plate is arranged parallel to the wing plate.

[0017] As a preferred embodiment, the wing plate has a baffle on the side of the upright plate that is higher.

[0018] As a preferred embodiment, the cover plate is a flat cover plate or an arc-shaped cover plate.

[0019] As a preferred embodiment, the edge of the flat cover plate is provided with a bending plate.

[0020] As a preferred embodiment, an included angle α is provided between the bending plate and the lower end face of the flat cover plate, where 90° < α < 180°.

[0021] As a preferred embodiment, the bending plate has holes.

[0022] As a preferred embodiment, stiffening ribs are provided at the connection points between the vertical plate and the wing plate, the vertical plate and the tower plate, and the vertical plate and the cover plate.

[0023] As a preferred embodiment, the width of the wing plate is equal to that of the cover plate.

[0024] As a preferred embodiment, the widths of the wing plates and the cover plates on the upright plate increase sequentially along the direction of the cover plate.

[0025] As a preferred embodiment, the number of layers of the wing plate is 1 to 4.

[0026] As a preferred embodiment, the wing plate employs at least two layers of wing plates, with the sieve holes on adjacent wing plates arranged alternately.

[0027] As a preferred embodiment, when at least two wing plates are used, the number of wing plates is 2 to 4.

[0028] As a preferred embodiment, the vertical plate is provided with the sieve holes.

[0029] This application has the following advantages:

[0030] 1. The combination of wing plates, cover plates, and vertical plates realizes the combination of three types of trays: tray (sieve tray), three-dimensional mass transfer tray, and solid valve tray. While effectively increasing the mass transfer efficiency, it also has a better interception effect on mist entrainment, reduces the mist entrainment of the tray, thereby improving the separation efficiency of the tray, and at the same time gives the tray better anti-clogging performance.

[0031] 2. This application uses a vertical plate connected to the tray, with openings on the vertical plate to reduce the weight of the tray, while increasing the flow rate and the degree of contact between the gas and liquid phases. At the same time, only one vertical plate is connected to the tray, avoiding dead zones and increasing anti-clogging performance.

[0032] 3. The multi-layer wing plate configuration can greatly increase the contact intensity between gas and liquid, enhance the mass transfer efficiency, and thus improve the mass transfer efficiency of the tray. When using a multi-layer wing plate configuration, the openings between adjacent wing plates need to be staggered to avoid short-circuiting of the gas and liquid phases and reduce the efficiency of the tray.

[0033] 4. The top of the tray is equipped with a cover plate and a solid valve. The solid valve increases the flow of liquid on the cover plate, avoids the accumulation of solids, reduces dead zones, and enhances the anti-clogging performance of the tray.

[0034] 5. The addition of stiffening ribs increases connection strength and prevents damage to the trays;

[0035] 6. The combined tower trays in this application effectively improve the separation efficiency of single-layer tower trays, can achieve energy-saving effects in tower tray retrofitting, and can save energy for new tower projects while reducing tower height and saving investment. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure from one angle of Embodiment 1 of this application;

[0037] Figure 2 This is a structural schematic diagram from angle two of Embodiment 1 of this application;

[0038] Figure 3 This is a structural schematic diagram of Embodiment 2 of this application;

[0039] Figure 4 This is a structural schematic diagram of Embodiment 3 of this application;

[0040] Figure 5 This is a structural schematic diagram of Embodiment 4 of this application;

[0041] Figure 6 This is a structural schematic diagram of embodiment five of this application from one angle;

[0042] Figure 7 This is a schematic diagram of the angle between the wing plate and the bending plate in this application;

[0043] Figure 8 This is a schematic diagram of the angle between the cover plate and the bent plate in this application;

[0044] 1. Tray 2. Vertical plate 3. Flange plate 4. Cover plate 5. Fixed valve

[0045] 6. Sieve hole; 7. Wing plate one; 8. Wing plate two; 9. Wing plate three

[0046] 10. Bending plate; 11. Hole; 12. Rib plate; 13. Regular corrugated plate

[0047] 14. Baffle. Detailed Implementation

[0048] The following is in conjunction with the appendix Figure 1 — Figure 8 The specific embodiments of the present invention will be described in detail below. It should be noted that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the present invention.

[0049] Example 1:

[0050] like Figure 1 , Figure 2As shown, this embodiment provides a composite three-dimensional mass transfer tray, including a tray 1, which is a sieve tray. A vertical plate 2 is provided on the tray 1, preferably rectangular, and is perpendicular to the tray 1. The vertical plate 2 is connected by welding or other methods, requiring only one vertical plate 2, thus reducing the dead zone in this area compared to traditional trays. Flanges 3 are connected to both sides of the vertical plate 2. Preferably, the flanges 3 are symmetrically arranged about the vertical plate 2. The flanges 3 are connected to the vertical plate 2 by welding or other methods, or they can be integrally formed. The flanges 3 can be horizontally or obliquely positioned on the vertical plate 2. When horizontally positioned, the flanges 3 are parallel to the tray 1; when obliquely positioned, the flanges 3 intersect with the extension line of the tray 1. The flange 3 is preferably 1-4 layers. The top of the vertical plate 2 is connected to a cover plate 4 by means of a certain method. The cover plate 4 is provided with a solid valve 5. The cover plate 4 and the solid valve 5 are combined to form a solid valve tray. The addition of the solid valve 5 to the cover plate 4 increases the fluidity of the liquid on the cover plate 4 and avoids dead zones on the cover plate 4. The solid valve 5 can be any existing solid valve form. This application does not make any improvement to it and will not elaborate here. The tray 1 and the flange 3 are both provided with sieve holes 6. The shape of the sieve holes 6 is not limited to circular, rectangular, triangular, clover-shaped, four-leaf groove, irregular shape, etc. Preferably, the vertical plate 2 is also provided with sieve holes 6, which can ensure the passage of gas and liquid phases and reduce the weight of the overall tray and reduce the strength requirements of the tower body.

[0051] More preferably, to further effectively reduce the degree of fog entrainment, the wing plate 3 adopts a multi-layered wing plate with at least two layers. The combination of the multi-layered wing plate 3 and the cover plate 4 can effectively reduce the degree of fog entrainment. The wing plate 3 is preferably 2 to 4 layers. In this embodiment... Figure 1 , Figure 2 The structure employs three layers, including wing plate 1 (7), wing plate 2 (8), and wing plate 3 (9). Each of these wing plates includes two wing plates 3 positioned on either side of the vertical plate 2. Figure 1 , Figure 2 As shown, in this embodiment, the first wing plate 7, the second wing plate 8, and the third wing plate 9 are all horizontally arranged. In order to ensure separation efficiency, the sieve holes 6 on the first wing plate 7, the second wing plate 8, the second wing plate 8, and the third wing plate 9 are staggered. The combination of the multi-layer wing plates 3 and the cover plate 4 can effectively reduce the degree of mist entrainment.

[0052] In this embodiment, wing plate 7, wing plate 8, and wing plate 9 are all flat wing plates, and the length, width, and thickness of wing plate 7, wing plate 8, and wing plate 9 are all equal. To better achieve liquid flowability, a bending plate 10 is provided at the edge of wing plate 7, wing plate 8, and wing plate 9. The length of the bending plate 10 is equal to the length of wing plate 7, wing plate 8, and wing plate 9, that is, the long side of wing plate 7, wing plate 8, and wing plate 9 is connected to the long side of the bending plate 10, or they are integrally formed. The width of the bending plate 10 is preferably about 20-30mm. Figure 7 As shown, the bending plate 10 and the flat wing plate have an angle α, which is greater than 90° and less than 180°, more preferably greater than 90° and less than 170°. In this embodiment, the angle between wing plate 1 (7), wing plate 2 (8), and wing plate 3 (9) is α. The bending plate 10 has a hole 11, and the shape of the hole 11 is not limited to, but can be circular, rectangular, triangular, clover-shaped, four-leaf groove-shaped, irregular, etc. The cover plate 4 is a flat cover plate or an arc-shaped cover plate. Figure 1 A flat cover plate can be used, but an arc-shaped cover plate can also be used; no specific limitation is made here. Similarly, when using a flat cover plate, a bent plate 10 is provided at the edge of the flat cover plate. The length of the bent plate 10 is equal to the length of the flat cover plate, and the width of the bent plate 10 is preferably about 20-30mm. Figure 8 As shown, the bending plate 10 and the flat cover plate have an angle α, where α is greater than 90° and less than 180°, and more preferably α is greater than 90° and less than 170°; the bending plate 10 has a hole 11, and the shape of the hole 11 is not limited to, but can be circular, rectangular, triangular, clover-shaped, four-leaf groove-shaped, irregular, etc.; preferably, the length and width of the flat cover plate are equal to the length and width of the first wing plate 7, the second wing plate 8, and the third wing plate, respectively.

[0053] Preferably, stiffening ribs 12 are provided at the connection points between the upright plate 2 and the wing plate 3, the connection points between the upright plate 2 and the tower plate 1, and the connection points between the upright plate 2 and the cover plate 4. The stiffening ribs 12 are connected to the upright plate 2, the wing plate 3, the tower plate 1, and the cover plate 4 by welding or other means. The stiffening ribs 12 between the upright plate 2 and the tower plate 1 and between the cover plate 4 and the upright plate 2 increase the strength of the tower tray. The stiffening ribs 12 between the wing plate 3 and the upright plate 2 strengthen the connection between the wing plate 3 and the upright plate 2, and prevent the wing plate 3 from being repeatedly bent and damaged.

[0054] This embodiment provides a composite three-dimensional mass transfer tray that significantly improves both tray efficiency and anti-clogging performance. It organically combines various tray types, integrating their advantages to create a synergistic effect. This design combines the advantages of a three-dimensional mass transfer tray, a sieve tray, and a valve tray, utilizing the anti-clogging performance of the valve tray and the high efficiency of the three-dimensional mass transfer tray. While effectively increasing mass transfer efficiency, it also provides better interception of mist entrainment, reducing mist entrainment and thus improving tray separation efficiency.

[0055] Example 2:

[0056] like Figure 3 As shown, the difference between this embodiment and embodiment one is that the lengths of wing plate 1 7, wing plate 2 8, wing plate 3 9, and cover plate 4 are equal, and the widths increase sequentially, resulting in better operation and processing effect on the large volume tower and higher mass transfer efficiency.

[0057] Preferably, the thicknesses of the first wing plate 7, the second wing plate 8, and the third wing plate 9 are equal.

[0058] Example 3:

[0059] like Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the first wing plate 7, the second wing plate 8, and the third wing plate 9 are arc-shaped wing plates. The highest point is where the arc-shaped wing plate connects to the vertical plate 2, and then it bends downward in an arch. The curvature, width, and thickness of the first wing plate 7, the second wing plate 8, and the third wing plate 9 are all equal.

[0060] The cover plate 4 is a flat cover plate or an arc-shaped cover plate. Figure 3 The cover plate can be either curved or flat; no specific limitation is made here. When a flat cover plate is used, the specific structure is as described in Embodiment 1, and will not be elaborated here. When a curved cover plate is used, the curvature and width of the curved cover plate are equal to the curvature and width of wing plate 7, wing plate 8, and wing plate 9.

[0061] Example 4:

[0062] like Figure 5 As shown, the difference between this embodiment and embodiment three is that the widths of the first wing plate 7, the second wing plate 8, and the third wing plate 9 gradually increase, resulting in better operation and processing of the large volume tower and higher mass transfer efficiency. The curvature of the first wing plate 7, the second wing plate 8, and the third wing plate 9 can be equal to or gradually increase the curvature of the cover plate 4, depending on the volume of the tower. No specific limitation is made.

[0063] Example 5:

[0064] like Figure 6As shown, the difference between this embodiment and Embodiment 1 is that the first wing plate 7, the second wing plate 8, and the third wing plate 9 are regular corrugated plates 13 with crests and troughs. The crest and trough cross-section of the regular corrugated plate 13 can be wavy, rectangular, triangular, or other shapes, and is not specifically limited. Technicians can choose according to specific circumstances. In this embodiment, the regular corrugated plate 13 is inclined, which can further improve mass transfer efficiency. More specifically, the first wing plate 7, the second wing plate 8, and the third wing plate 9 are all inclined, and the first wing plate 7, the second wing plate 8, and the third wing plate 9 are parallel to each other. In this embodiment, the top surface of the vertical plate 2 is parallel to the wing plate 3 and is also set as an inclined surface, but it is not limited to an inclined surface; it can also be a plane. Similarly, the cover plate 4 in this embodiment is a flat cover plate or an arc-shaped cover plate, which will not be elaborated here; a corrugated plate with a rectangular crest and trough cross-section can also be used to facilitate the installation of the valve. This embodiment is not specifically limited, and technicians can set it according to specific circumstances.

[0065] Preferably, in order to prevent back mixing when the liquid volume is large and thus further improve the mass transfer effect, the inclined wing plate 3 is provided with a baffle 14 on the higher side of the vertical plate 2. The baffle is connected to one end of the wing plate 3 by welding or other means, or it can be formed in one piece.

[0066] Example 6:

[0067] This embodiment provides a specific application scenario, specifically:

[0068] The composite three-dimensional mass transfer tray from Example 1 was used to treat turbid liquid containing solid particles in a distillation column. The column diameter was 1800 mm and the tray had 60 layers.

[0069] When using the original three-dimensional mass transfer tray, the reflux ratio of the tower was 3.4, resulting in high energy consumption. Furthermore, after about three months, a large amount of solid particles accumulated on the tray, causing blockage and preventing the entire tower from operating normally. The pressure drop increased threefold, and the tower efficiency dropped to 40% of its original level, severely impacting normal production and requiring frequent and difficult cleaning of the internal components. After switching to the tray of Example 1, the tower was successfully started up for about a year. The amount of solids deposited on the tray was less than 60% of the original, while maintaining high separation efficiency and extending the operating cycle. The structure of this tray avoids some dead zones, making it easier to clean. Moreover, due to the high efficiency of the tray, the number of theoretical plates was increased, effectively reducing the reflux ratio to 2.8, achieving an energy saving effect of 17.6%.

[0070] In summary, due to the adoption of the above technical solution, this application has the following advantages:

[0071] 1. The combination of wing plates, cover plates, and vertical plates realizes the combination of three types of trays: tray (sieve tray), three-dimensional mass transfer tray, and solid valve tray. While effectively increasing the mass transfer efficiency, it also has a better interception effect on mist entrainment, reduces the mist entrainment of the tray, thereby improving the separation efficiency of the tray, and at the same time gives the tray better anti-clogging performance.

[0072] 2. This application uses a vertical plate connected to the tray, with openings on the vertical plate to reduce the weight of the tray, while increasing the flow rate and the degree of contact between the gas and liquid phases. At the same time, only one vertical plate is connected to the tray, avoiding dead zones and increasing anti-clogging performance.

[0073] 3. The multi-layer wing plate configuration can greatly increase the contact intensity between gas and liquid, enhance the mass transfer efficiency, and thus improve the mass transfer efficiency of the tray. When using a multi-layer wing plate configuration, the openings between adjacent wing plates need to be staggered to avoid short-circuiting of the gas and liquid phases and reduce the efficiency of the tray.

[0074] 4. The top of the tray is equipped with a cover plate and a solid valve. The solid valve increases the flow of liquid on the cover plate, avoids the accumulation of solids, reduces dead zones, and enhances the anti-clogging performance of the tray.

[0075] 5. The addition of stiffening ribs increases connection strength and prevents damage to the trays;

[0076] 6. The combined tower trays in this application effectively improve the separation efficiency of single-layer tower trays, can achieve energy-saving effects in tower tray retrofitting, and can save energy for new tower projects while reducing tower height and saving investment.

[0077] The devices and connections not specifically described above are all prior art, and will not be described in detail here.

[0078] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0079] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, the various possible combinations in this application will not be described separately.

[0080] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of this application, and such combinations should also be regarded as the content disclosed in this application.

Claims

1. A composite three-dimensional mass transfer tray, comprising a tray (1), characterized in that, The tower plate (1) is provided with a vertical plate (2), and the two sides of the vertical plate (2) are connected with wing plates (3). The top of the vertical plate (2) is provided with a cover plate (4), and the cover plate (4) is provided with a solid valve (5). The tower plate (1) and the wing plates (3) are both provided with sieve holes (6).

2. The composite three-dimensional mass transfer tray according to claim 1, characterized in that, The wing plate (3) is a flat wing plate or an arc-shaped wing plate. A bending plate (10) is provided at the edge of the flat wing plate. An angle α is provided between the bending plate (10) and the lower end face of the wing plate (3), where 90° < α < 180°.

3. The composite three-dimensional mass transfer tray according to claim 1, characterized in that, The wing plate is a regular corrugated plate with crests and troughs.

4. A composite three-dimensional mass transfer tray according to claim 2 or 3, characterized in that, The wing plate (3) is set horizontally or inclined on the vertical plate (2).

5. A composite three-dimensional mass transfer tray according to claim 4, characterized in that, The top surface of the vertical plate (2) is set parallel to the wing plate (3).

6. A composite three-dimensional mass transfer tray according to claim 4, characterized in that, The wing plate (3) has a baffle (14) on the higher side of the vertical plate (2).

7. A composite three-dimensional mass transfer tray according to claim 1, characterized in that, The cover plate (4) is a flat cover plate or an arc-shaped cover plate. A bending plate (10) is provided at the edge of the flat cover plate. An angle α is provided between the bending plate (10) and the lower end face of the flat cover plate, where 90° < α < 180°.

8. A composite three-dimensional mass transfer tray according to claim 2 or 7, characterized in that, The bending plate (10) has a hole (11).

9. A composite three-dimensional mass transfer tray according to claim 1, characterized in that, The connection between the vertical plate (2) and the wing plate (3), the connection between the vertical plate (2) and the tower plate (1), and the connection between the vertical plate (2) and the cover plate (4) are provided with stiffening plates (12).

10. A composite three-dimensional mass transfer tray according to claim 1, characterized in that, The widths of the wing plate (3) and the cover plate (4) are equal; or the widths of the wing plate (3) and the cover plate (4) increase sequentially along the direction of the cover plate (4) on the upright plate (2).

11. A composite three-dimensional mass transfer tray according to claim 1, characterized in that, The wing plate (3) adopts at least two layers of wing plates (3), and the screen holes (6) on adjacent wing plates (3) are staggered.

12. A composite three-dimensional mass transfer tray according to claim 1, characterized in that, The vertical plate (2) is provided with the sieve holes (6).

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