Rectifier for p-fluorobenzaldehyde production

Abstract

The utility model discloses a rectifier for p-fluorobenzaldehyde production. The rectifier comprises a rectifying tank, a servo motor is mounted at the upper end of the rectifying tank, a driving shaft of the servo motor is arranged in the rectifying tank in a penetrating manner, a liquid dispersing component is arranged at the lower end of the driving shaft, and a tower plate is mounted in the rectifying tank. According to the utility model, the servo motor and the driving shaft are operated to drive the connecting frame to rotate so as to drive the liquid accumulation disc to rotate, and when the liquid accumulation disc rotates, the liquid in the liquid accumulation disc is sprayed out through the liquid dispersing opening, so that the liquid is conveniently and uniformly contacted with the tower plate, and the influence on the mass transfer efficiency and the separation effect is avoided; the connecting rods, the limiting blocks and the limiting grooves are adopted, and the limiting blocks are moved out of the limiting grooves, so that the tower plates are convenient to disassemble and assemble, the tower plates are convenient to replace according to the production process requirements in the steps of separating the tower plates, changing the arrangement mode of the tower plates and the like, and meanwhile, the problems that the tower plates are inconvenient to disassemble when being blocked by materials, scales or particles, the rectification efficiency is influenced and the like are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fluorobenzaldehyde processing, in particular to a rectifier for producing p-fluorobenzaldehyde. Background Art

[0002] Fluorobenzaldehyde has a benzene ring and an aldehyde group, which can play different roles in chemical reactions. In the process of benzaldehyde production, it needs to go through a distillation system. The distillation device separates liquids by different volatilities. p-Fluorobenzaldehyde is an important fine chemical intermediate and is used as the main raw material for synthesizing a variety of pesticides, medicines, surfactants, polymer monomers, and mildew inhibitors. In order to obtain p-benzaldehyde with higher purity, it is usually subjected to distillation treatment. Combined with existing literature, a distillation tower for the production of p-chlorobenzaldehyde (CN217939188U)

[0003] The existing technology has the following problems:

[0004] 1. After the liquid to be treated enters the tank body from the liquid inlet, it falls on a certain area of ​​the distillation plate due to gravity. Other areas on the distillation plate may not be covered with enough liquid, which leads to the inability of some liquid to fully contact with the steam, affecting the mass transfer efficiency and separation effect. Therefore, a rectifier with uniform contact is required.

[0005] 2. The channels and holes on the tower plates may be blocked by material deposition, scaling or particle clogging, which may lead to flow obstruction. At the same time, when it is necessary to increase the number of separation stages, change the tower plate layout or improve the mass transfer efficiency, the tower plates need to be replaced. Therefore, a distillation device that is easy to disassemble the tower plates is required.

[0006] Therefore, we proposed a rectifier for the production of p-fluorobenzaldehyde to solve the above-mentioned drawbacks. Utility Model Content

[0007] The utility model aims to solve the shortcomings in the prior art and proposes a rectifier for producing p-fluorobenzaldehyde.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A rectifier for producing p-fluorobenzaldehyde comprises a rectifier tank, a servo motor is installed at the upper end of the rectifier tank, a drive shaft of the servo motor is arranged through the inside of the rectifier tank, a bulk liquid component is arranged at the lower end of the drive shaft, a tower plate is installed inside the rectifier tank, both sides of the tower plate are connected to the rectifier tank through a disassembly component, and the tower plates are located at the lower end of the bulk liquid component.

[0010] Preferably, the liquid dispersion component includes: a connecting frame, which is arranged at the lower end of the driving shaft, and the connecting frame is arranged in an inverted U shape; a liquid collection tray, which is arranged at the lower end of the connecting frame, and the liquid collection tray is arranged in a conical shape, and a plurality of groups of liquid dispersion ports are equidistantly provided inside the liquid collection tray, and the liquid dispersion ports are evenly distributed in a fan-shaped area on the liquid collection tray with the center of the disk as the vertex.

[0011] Preferably, the disassembly assembly includes: a mounting seat, which is arranged on both sides of the inner wall of the distillation tank, and a square groove is opened at the upper end of the mounting seat; a connecting rod, which is arranged through the upper end of the mounting seat, a limiting block is arranged at the lower end of the connecting rod, a pulling block is arranged at the upper end of the connecting rod, and a spring is sleeved on the outer side of the connecting rod, one end of the spring is connected to the limiting block, and the other end of the spring is connected to the inner wall of the square groove; a limiting groove, which is opened on both sides of the tower plate, and the limiting block is fitted and plugged into the limiting groove.

[0012] Preferably, an air outlet is provided at the upper end of the distillation tank, a condenser is provided on the outer side of the air outlet, and one end of the air outlet is connected to the liquid storage tank.

[0013] Preferably, a drain pipe is provided at the lower end of the distillation tank, one end of the drain pipe is connected to the reboiler, and the upper end of the reboiler is connected to the distillation tank through a conduit.

[0014] Preferably, a valve is provided between the drain pipe and the reboiler.

[0015] Preferably, a steam inlet is provided on the left side of the lower end of the distillation tank, and a liquid inlet is provided on the right side of the upper end of the distillation tank, and the liquid inlet is located at the upper end of the connecting frame.

[0016] Preferably, a movable door is provided at the front end of the distillation tank, a sealing gasket is provided inside the movable door, and the movable door is located at the front end of the tower plate.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] (1) The utility model adopts a servo motor to drive the connecting frame to rotate, thereby driving the liquid accumulation plate to rotate. When the liquid accumulation plate rotates, the liquid inside is sprayed out through the liquid dispersion port, so that the liquid can be evenly contacted with the tower plate, thereby avoiding affecting the mass transfer efficiency and separation effect.

[0019] (2) The utility model adopts a connecting rod, a limit block and a limit groove, and moves the limit block out of the limit groove, so that the tower plate can be easily disassembled and assembled, and it is convenient to replace the tower plate according to the production process requirements by adjusting the number of stages of the tower plate and changing the tower plate arrangement. At the same time, it also avoids the problem that the tower plate is difficult to disassemble when materials are deposited, scaled or blocked by particles, which affects the distillation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below.

[0021] Figure 1 This is a schematic diagram of the structure of a rectifier for producing p-fluorobenzaldehyde proposed by the utility model;

[0022] Figure 2 This is a schematic diagram of the main plane view of a rectifier for producing p-fluorobenzaldehyde proposed by the utility model;

[0023] Figure 3 This is a schematic diagram of the main cross-section of a rectifier for producing p-fluorobenzaldehyde proposed by the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of a connecting rod, a limiting block and a limiting groove of a rectifier for producing p-fluorobenzaldehyde proposed by the utility model;

[0025] Figure 5 The utility model discloses a structural schematic diagram of a driving shaft, a connecting frame and a liquid accumulation tray of a rectifier for producing p-fluorobenzaldehyde.

[0026] Legend:

[0027] 1. Distillation tank; 2. Movable door; 3. Servo motor; 4. Air outlet; 5. Condenser; 6. Drain pipe; 7. Liquid storage tank; 8. Reboiler; 9. Valve; 10. Steam inlet; 11. Drive shaft; 12. Connecting frame; 13. Liquid accumulation tray; 14. Tower plate; 15. Liquid dispersion port; 16. Mounting seat; 17. Limit block; 18. Connecting rod; 19. Spring; 20. Limit groove; 21. Square groove; 22. Liquid inlet. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0029] Example: Figure 1-Figure 2 As shown, a rectifier for producing p-fluorobenzaldehyde includes a distillation tank 1, a condenser 5 is arranged outside the gas outlet 4 at the upper end of the distillation tank 1, and the other end of the gas outlet 4 is connected to the liquid storage tank 7. When in use, the steam or gas generated during the distillation process is released through the gas outlet 4 at the upper end of the distillation tank 1, and then cooled by the condenser 5 to be converted into a liquid state, and introduced into the liquid storage tank 7 for storage or further processing. The lower end of the distillation tank 1 is provided with a drain pipe 6.

[0030] like Figure 3-Figure 5 As shown, the driving shaft 11 at the lower end of the servo motor 3 is connected to the connecting frame 12. When in use, the liquid to be distilled is injected into the distillation tank 1 from the liquid inlet 22. The liquid inlet 22 is located at the upper end of the liquid accumulation tray 13. The injected liquid to be distilled is collected in the liquid accumulation tray 13. At the same time, the servo motor 3 is operated, and the driving shaft 11 drives the connecting frame 12 to rotate, thereby driving the liquid accumulation tray 13 to rotate. When the liquid accumulation tray 13 rotates, the liquid inside is sprayed out through the liquid dispersion port 15, so that the liquid is evenly contacted with the tower plate 14 to avoid affecting the mass transfer efficiency and separation effect. At the same time, the steam inlet 1 0 high-temperature water vapor is injected into the interior, and the high-temperature water vapor moves to the upper end of the distillation tank 1 through the tower plate 14 layer by layer. In the countercurrent process of liquid and steam, the gas-liquid two phases converge on the surface of each layer of the distillation plate, the volatile components in the liquid phase enter the gas phase, and the non-volatile components in the gas phase are transferred to the liquid phase. The liquid phase material sinks to the bottom of the tank body, and the gas phase material rises to the top of the tank body. When the liquid phase material at the bottom of the tank does not meet the process requirements, the valve 9 is opened to allow the liquid phase material to enter the reboiler 8 through the discharge pipe 6 for heating. The steam formed after heating enters the distillation tank 1 again along the conduit from the top of the reboiler 8 for distillation.

[0031] like Figure 4 As shown, mounting seats 16 are provided on both sides of the inner wall of the distillation tank 1, and a connecting rod 18 is provided on the upper end of the mounting seat 16. When the tower plate 14 is installed, the movable door 2 can be opened, and then the pull block is pulled to move the limit block 17 upward to the inside of the square groove 21. At this time, the spring 19 is in a compressed state. After the tower plate 14 is pushed in, the restriction on the connecting rod 18 is released, and the spring 19 rebounds to drive the limit block 17 to move to the inside of the limit groove 20, completing the fixation of the tower plate 14. When it is necessary to disassemble the tower plate 14, the connecting rod 18 can be pulled by the push block to move the limit block 17 out of the inside of the limit groove 20, and then the tower plate 14 can be pulled outward through the movable door, so that the tower plate 14 is easy to disassemble and assemble, and it is convenient to replace the tower plate according to the production process requirements, such as the number of separation stages of the tower plate 14 and the change of the arrangement of the tower plate 14. At the same time, it also avoids the inconvenience of disassembly of the tower plate 14 when materials are deposited, scaled or blocked by particles, which affects the distillation efficiency.

[0032] Working principle: When in use, the liquid to be distilled is injected into the distillation tank 1 from the liquid inlet 22, the liquid inlet 22 is located at the upper end of the liquid accumulation plate 13, and the injected liquid to be distilled is collected in the liquid accumulation plate 13. At the same time, the servo motor 3 is operated, and the driving shaft 11 drives the connecting frame 12 to rotate, thereby driving the liquid accumulation plate 13 to rotate. While the liquid accumulation plate 13 rotates, the liquid inside is sprayed out through the liquid dispersion port 15, so that the liquid is evenly contacted with the tower plate 14 to avoid affecting the mass transfer efficiency and separation effect. At the same time, high-temperature water vapor is injected into the interior through the steam inlet 10, and the high-temperature water vapor passes through the tower plate 14 layer by layer and moves toward the upper end of the distillation tank 1. In the countercurrent process of liquid and steam, the gas-liquid two phases converge on the surface of each layer of the distillation plate, and the volatile components in the liquid phase enter the gas phase, and the non-volatile components in the gas phase are transferred to the liquid The liquid-phase material sinks to the bottom of the tank body, and the gas-phase material rises to the top of the tank body. When the liquid-phase material at the bottom of the tank does not meet the process requirements, the valve 9 is opened to allow the liquid-phase material to enter the reboiler 8 for heating through the discharge pipe 6. The steam formed after heating enters the distillation tank 1 again along the conduit from the top of the reboiler 8 for distillation. When it is necessary to disassemble the tower plate 14, the connecting rod 18 can be pulled by the push block to move the limit block 17 out of the limit groove 20, and then the tower plate 14 can be pulled out through the movable door, so that the tower plate 14 is easy to disassemble and assemble, and it is convenient to replace the tower plate 14 according to the production process requirements, such as the number of separation stages of the tower plate 14 and the change of the arrangement of the tower plate 14. At the same time, it also avoids the problem that the tower plate 14 is inconvenient to disassemble when the material is deposited, scaled or blocked by particles, which affects the distillation efficiency.

[0033] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A rectifier for producing p-fluorobenzaldehyde, comprising a rectifier tank (1), characterized in that: A servo motor (3) is installed at the upper end of the distillation tank (1), a drive shaft (11) of the servo motor (3) is arranged to penetrate the interior of the distillation tank (1), a bulk liquid assembly is arranged at the lower end of the drive shaft (11), a tower plate (14) is installed inside the distillation tank (1), both sides of the tower plate (14) are connected to the distillation tank (1) through a disassembly assembly, and the tower plates (14) are located at the lower end of the bulk liquid assembly.

2. A rectifier for producing p-fluorobenzaldehyde according to claim 1, characterized in that: The bulk liquid component comprises: A connecting frame (12) is arranged at the lower end of the driving shaft (11), and the connecting frame (12) is arranged in an inverted U shape; A liquid collection tray (13) is arranged at the lower end of the connecting frame (12); the liquid collection tray (13) is arranged in a conical shape, and a plurality of groups of liquid dispersion openings (15) are evenly spaced inside the liquid collection tray (13); and the liquid dispersion openings (15) are evenly distributed in a fan-shaped area on the liquid collection tray (13) with the center of the disk as the vertex.

3. A rectifier for producing p-fluorobenzaldehyde according to claim 1, characterized in that: The disassembly assembly comprises: Mounting seats (16) are arranged on both sides of the inner wall of the rectification tank (1), and a square groove (21) is formed at the upper end of the mounting seats (16); A connecting rod (18) is provided through the upper end of the mounting seat (16); a limit block (17) is provided at the lower end of the connecting rod (18); a pull block is provided at the upper end of the connecting rod (18); a spring (19) is sleeved on the outer side of the connecting rod (18); one end of the spring (19) is connected to the limit block (17); and the other end of the spring (19) is connected to the inner wall of the square groove (21); The limiting grooves (20) are arranged on both sides of the tower plate (14), and the limiting blocks (17) are fitted and plugged into the limiting grooves (20).

4. A rectifier for producing p-fluorobenzaldehyde according to claim 1, characterized in that: The upper end of the distillation tank (1) is provided with a gas outlet (4), a condenser (5) is provided outside the gas outlet (4), and one end of the gas outlet (4) is connected to a liquid storage tank (7).

5. A rectifier for producing p-fluorobenzaldehyde according to claim 1, characterized in that: A liquid discharge pipe (6) is provided at the lower end of the distillation tank (1), one end of the liquid discharge pipe (6) is connected to a reboiler (8), and the upper end of the reboiler (8) is connected to the distillation tank (1) via a conduit.

6. A rectifier for producing p-fluorobenzaldehyde according to claim 5, characterized in that: A valve (9) is provided between the liquid discharge pipe (6) and the reboiler (8).

7. A rectifier for producing p-fluorobenzaldehyde according to claim 1, characterized in that: A steam inlet (10) is provided on the left side of the lower end of the distillation tank (1), and a liquid inlet (22) is provided on the right side of the upper end of the distillation tank (1), wherein the liquid inlet (22) is located at the upper end of the connecting frame (12).

8. A rectifier for producing p-fluorobenzaldehyde according to claim 1, characterized in that: The front end of the distillation tank (1) is provided with a movable door (2), a sealing gasket is provided inside the movable door (2), and the movable door (2) is located at the front end of the tower plate (14).

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