Foam removing device for phenylethylamine production

Abstract

The utility model discloses a foam removal device for phenylethylamine production, and relates to the technical field of phenylethylamine production equipment, the foam removal device comprises a reaction kettle, a motor, a rotating shaft, stirring blades, a rotating plate and a fixed plate, the bottom of the reaction kettle is provided with supporting legs, the top of the reaction kettle is provided with a feed port, and the bottom of the reaction kettle is provided with a discharge port; the motor is fixedly arranged in the center of the top of the reaction kettle, the rotating shaft is vertically arranged in the reaction kettle, the upper end of the rotating shaft rotationally penetrates through the top of the reaction kettle and is connected with the output end of the motor, the lower end of the rotating shaft is rotationally connected with the center of the bottom of the reaction kettle, and the stirring blades are arranged on the rotating shaft and are lower than the liquid level; the rotating shaft is adopted to drive the rotating plate and the first crushing rod at the bottom of the rotating plate to rotate, and the second crushing rod on the fixed plate between the rotating shaft and the side wall of the reaction kettle is matched to impact and crush foams on the liquid surface, so that the foams are eliminated, the situation that the foams adhere to the wall is reduced, the safety problem caused by the foams is avoided, and the product yield is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of phenethylamine production equipment, specifically a foam removal device for phenethylamine production. Background Technology

[0002] In the industrial production of phenethylamine, foam formation has long been a key technical challenge hindering production efficiency and product quality. The synthesis of phenethylamine typically involves catalytic amination of phenylethanol and ammonia, reductive amination, or other multiphase reaction systems under high temperature and pressure conditions. During these reactions, factors such as residual surfactants in the raw materials, rapid release of reaction byproduct gases (e.g., hydrogen, ammonia), shearing effects caused by mechanical stirring, and changes in the viscosity of the reaction liquid can easily lead to the formation of a highly stable foam layer in the reaction vessel, distillation column, or subsequent separation equipment. This foam not only adheres to the inner wall of the reaction vessel, making it difficult to clean, but also reduces mass and heat transfer efficiency, and may even cause safety hazards such as flooding and overflow, directly affecting production continuity and product yield. Utility Model Content

[0003] To address the aforementioned shortcomings of existing technologies, this utility model provides a foam removal device for phenylethylamine production. It employs a rotating shaft to drive a rotating plate and a first crushing rod at the bottom of the rotating plate to rotate. A second crushing rod on a fixed plate between the rotating shaft and the side wall of the reactor impacts and breaks up the foam on the liquid surface, eliminating the foam, reducing foam adhesion to the walls, avoiding safety issues caused by foam, and improving product yield.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a foam removal device for phenylethylamine production, comprising a reaction vessel, a motor, a rotating shaft, stirring blades, a rotating plate, and a fixed plate. The reaction vessel has supporting legs at its bottom, an inlet at its top, and an outlet at its bottom. The motor is fixedly positioned at the center of the top of the reaction vessel. The rotating shaft is vertically positioned inside the reaction vessel, with its upper end rotatably penetrating the top of the reaction vessel and connected to the motor output. The lower end of the rotating shaft is rotatably connected to the center of the bottom of the reaction vessel. The stirring blades are mounted on the rotating shaft and are below the liquid surface. The fixed plate is horizontally designed and one end is fixedly connected to the inner wall of the reactor. The fixed plate is designed to be below the liquid surface and a plurality of second crushing rods are evenly arranged on its upper surface. A fixed sleeve is fixedly installed on the rotating shaft and is above the liquid surface. The rotating plate is horizontally designed and one end is fixedly connected to the side wall of the fixed sleeve. The rotating plate is designed to be above the liquid surface and a plurality of first crushing rods are evenly arranged on its lower bottom surface. The lower end of the first crushing rod is below the liquid surface and above the upper surface of the fixed plate. The upper end of the second crushing rod is above the liquid surface and below the lower bottom surface of the rotating plate. The plurality of first crushing rods and the plurality of second crushing rods are staggered in the horizontal direction.

[0005] Preferably, a mounting ring is rotatably provided on the rotating shaft corresponding to the height of the fixed plate, and the fixed plate is fixedly connected to the mounting ring near the rotating end.

[0006] Preferably, a slider is provided at one end of the rotating plate near the side wall of the reactor, and a groove is formed on the side wall of the reactor corresponding to the height of the slider, and the slider is slidably connected to the groove.

[0007] Preferably, the first crushing rod and the second crushing rod are made of 316L stainless steel.

[0008] This invention provides a foam removal device for phenylethylamine production, which has the following beneficial effects:

[0009] 1. This utility model uses a rotating shaft to drive a rotating plate and a first crushing rod at the bottom of the rotating plate to rotate. The second crushing rod on the fixed plate between the rotating shaft and the side wall of the reactor impacts and crushes the foam on the liquid surface, eliminating the foam, reducing the foam from sticking to the wall, avoiding safety problems caused by the foam, and improving the product yield.

[0010] 2. The rotating plate of this utility model is provided with a slider at one end near the side wall of the reactor. A groove is formed on the side wall of the reactor corresponding to the height of the slider. The slider is slidably connected to the groove to ensure the stability of the rotating plate and the first crushing rod during operation. Attached Figure Description

[0011] Figure 1 This is a front cross-sectional view of a foam removal device for phenylethylamine production according to the present invention.

[0012] Figure 2 This utility model Figure 1 A schematic diagram showing the operation of the first and second crushing rods when they are close together.

[0013] In the diagram: 1. Reactor; 2. Support leg; 3. Feed inlet; 4. Discharge outlet; 5. Motor; 6. Rotating shaft; 7. Stirring blade; 8. Rotating plate; 9. Fixed sleeve; 10. Sliding block; 11. Slide groove; 12. First crushing rod; 13. Fixed plate; 14. Mounting ring; 15. Second crushing rod. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] like Figure 1-2As shown, a foam removal device for phenylethylamine production includes a reaction vessel 1, a motor 5, a rotating shaft 6, a stirring blade 7, a rotating plate 8, and a fixed plate 13. The reaction vessel 1 has support legs 2 at its bottom, an inlet 3 at its top, and an outlet 4 at its bottom. The motor 5 is fixedly positioned at the center of the top of the reaction vessel 1. The rotating shaft 6 is vertically positioned inside the reaction vessel 1, with its upper end rotatably penetrating the top of the reaction vessel 1 and connected to the output end of the motor 5. The lower end of the rotating shaft 6 is rotatably connected to the center of the bottom of the reaction vessel 1. The stirring blade 7 is mounted on the rotating shaft 6 and is below the liquid surface. The fixed plate 13 is horizontally designed and fixedly connected at one end to the inner wall of the reaction vessel 1. The fixed plate 13 is designed to be below the liquid surface, and multiple second breaking rods 15 are evenly arranged on its upper surface. A fixed sleeve 9 is fixedly mounted on the rotating shaft 6 and is above the liquid surface. The rotating plate 8 is horizontally designed and one end is fixedly connected to the side wall of the fixed sleeve 9. The rotating plate 8 is designed to be above the liquid surface and has a plurality of first crushing rods 12 evenly arranged on its bottom surface. The lower end of the first crushing rod 12 is below the liquid surface and above the upper surface of the fixed plate 13. The upper end of the second crushing rod 15 is above the liquid surface and below the bottom surface of the rotating plate 8. The plurality of first crushing rods 12 and the plurality of second crushing rods 15 are staggered in the horizontal direction. The rotating shaft 6 is rotatably provided with a mounting ring 14 corresponding to the height of the fixed plate 13. The fixed plate 13 is fixedly connected to the mounting ring 14 near the rotating end. The rotating plate 8 is provided with a slider 10 near the side wall of the reactor 1. A groove 11 is formed on the side wall of the reactor 1 corresponding to the height of the slider 10. The slider 10 is slidably connected to the groove 11. The first crushing rods 12 and the second crushing rods 15 are made of 316L stainless steel.

[0016] Its detailed connection methods are well-known technologies in this field. The following mainly introduces the working principle and process, as follows:

[0017] According to the instruction manual Figure 1-2 It is understood that the exhaust port, sampling port, temperature monitoring instrument, pressure monitoring instrument, shape of reactor 1, and external electrical control system of this utility model all adopt existing technologies.

[0018] In operation, the discharge port 4 is closed, and phenylethylamine production liquid is injected into the reactor 1 through the inlet 3 until the liquid level reaches the center height of the first crushing rod 12 and the second crushing rod 15. The motor 5 operates, and its output drives the rotating shaft 6 to rotate. The rotating shaft 6 drives the stirring blades 7 to stir the production liquid. Bubbles generated during production rise and accumulate on the liquid surface, forming foam. However, because the rotation of the rotating shaft 6 drives the fixed sleeve 9, the rotating plate 8, and the first crushing rod 12 on the bottom surface of the rotating plate 8 to rotate, and the lower end of the first crushing rod 12 is below the liquid level, the first crushing rod 12 can impact and break up some of the foam at a certain speed, thus dispersing it. Of course, multiple first crushing rods 12 drive another portion of the foam to rotate. However, because the second crushing rod 15 on the fixed plate 13 is staggered with the first crushing rod 12 in the horizontal direction, the upper end of the second crushing rod 15 is higher than the liquid level and lower than the bottom surface of the rotating plate 8, while the lower end of the first crushing rod 12 is lower than the liquid level and higher than the upper surface of the fixed plate 13. Figure 2 Therefore, the foam pushed by the first crushing rod 12 will impact the second crushing rod 15, cutting the foam and thus breaking it up and eliminating it. This invention uses a rotating shaft 6 to drive a rotating plate 8 and the first crushing rod 12 at the bottom of the rotating plate 8 to rotate. This, combined with the second crushing rod 15 fixed to the side wall of the reactor 1 between the rotating shaft 6 and the side wall, impacts and breaks the foam on the liquid surface, eliminating the foam, reducing foam adhesion to the wall, avoiding safety issues caused by foam, and improving product yield.

[0019] Among them, the rotating shaft 6 is provided with a mounting ring 14 at the height of the fixed plate 13. The fixed plate 13 is fixedly connected to the mounting ring 14 near the rotating end to ensure the stability of the fixed plate 13 and the second crushing rod 15 on the fixed plate 13.

[0020] Among them, a slider 10 is provided at one end of the rotating plate 8 near the side wall of the reactor 1, and a groove 11 is formed on the side wall of the reactor 1 corresponding to the height of the slider 10. The slider 10 is slidably connected to the groove 11 to ensure the stability of the rotating plate 8 and the first crushing rod 12 when they rotate.

[0021] The first crushing rod 12 and the second crushing rod 15 are made of 316L stainless steel, which has high hardness, resistance to corrosion in weak acid and alkaline environments, and good chemical stability.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foam removal device for phenethylamine production, characterized by, The utility model provides a reaction kettle, motor, pivot, stirring blade, rotary plate and fixed plate, the bottom of reaction kettle (1) is provided with support leg (2), and the top of reaction kettle (1) is provided with feed inlet (3), and the bottom is provided with discharge gate (4), and the motor (5) is fixedly arranged in the top center position of reaction kettle (1), and the pivot (6) is vertically arranged in reaction kettle (1) and is rotatably connected with the bottom center position of reaction kettle (1) on the upper end, and the stirring blade (7) is arranged on the pivot (6) and is below the liquid level, and the fixed plate (13) is horizontally designed and is fixedly connected with the inner side wall of reaction kettle (1) on one end, and the fixed plate (13) is below the liquid level and is uniformly provided with a plurality of second crushing rods (15) on the upper surface, and the pivot (6) is fixedly provided with a fixed sleeve (9) and is above the liquid level, and the rotary plate (8) is horizontally designed and is fixedly connected with the side wall of fixed sleeve (9) on one end, and the rotary plate (8) is above the liquid level and is uniformly provided with a plurality of first crushing rods (12) on the lower bottom surface, and the lower end of first crushing rod (12) is below the liquid level and is above the upper surface of fixed plate (13), and the upper end of second crushing rod (15) is above the liquid level and is below the lower bottom surface of rotary plate (8), and a plurality of first crushing rods (12) and a plurality of second crushing rods (15) are staggered in the horizontal direction.

2. A foam removal device for phenethylamine production according to claim 1, characterized in that, The pivot (6) is rotatably provided with a mounting ring (14) corresponding to the height of fixed plate (13), and the fixed plate (13) is fixedly connected with the mounting ring (14) near the rotating end.

3. A foam removal device for phenethylamine production according to claim 1, characterized in that, The rotary plate (8) is provided with a sliding block (10) near one end of the side wall of reaction kettle (1), and a sliding groove (11) is formed in the side wall of reaction kettle (1) corresponding to the height of sliding block (10), and the sliding block (10) is slidably connected with the sliding groove (11).

4. The foam removal device for phenethylamine production according to claim 1, characterized by, The first crushing rod (12) and the second crushing rod (15) are made of 316L stainless steel.

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