Stirring device for p-toluenesulfonic acid production

Abstract

The utility model discloses a p-toluenesulfonic acid production stirring device, and relates to the technical field of p-toluenesulfonic acid production, and the technical scheme is as follows: the p-toluenesulfonic acid production stirring device comprises a reaction kettle and a stirring assembly, the stirring assembly is arranged in the reaction kettle, the stirring assembly comprises a plurality of screw rods arranged in the reaction kettle, and the screw rods are arranged in the reaction kettle. The device further comprises a supporting seat which is slidably connected into the reaction kettle through the multiple lead screws, the multiple lead screws all penetrate through the supporting seat and are symmetrically arranged with the center of the supporting seat as the center, the positions, penetrating through the supporting seat, of the multiple lead screws are all in threaded connection with driven gears, and the multiple driven gears are all rotationally connected to the supporting seat; the reaction kettle has the effects that the mixing degree of methylbenzene and concentrated sulfuric acid in the reaction kettle is enhanced, and the problems that an upper solution and a lower solution form a dead zone and are not easy to mix are solved; the reaction rate is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of p-toluenesulfonic acid production, and more specifically, to a p-toluenesulfonic acid production stirring device. Background Art

[0002] p-Toluenesulfonic acid is an important organic chemical raw material, widely used in medicine, pesticides, dyes, fragrances and other fields.

[0003] The production of p-toluenesulfonic acid includes the sulfation of toluene. In order to speed up the reaction rate of toluene, a catalyst is usually added to the reactor and the internal solvent is stirred. However, due to the large difference in density between toluene and concentrated sulfuric acid, there will be obvious stratification in the reactor, which will greatly affect the reaction rate between the two.

[0004] A common method to solve the problem of toluene and concentrated sulfuric acid being difficult to mix in layers in a reactor is to add multiple stirring blades in the reactor. Through multi-layer stirring, the upper and lower solutions in the reactor can be mixed. However, if the spacing between the stirring blades is too small, a large flow field may be formed in the reactor, which may easily form a dead zone, causing some solutions to be difficult to mix and resulting in incomplete reaction. If the spacing between the stirring blades is too large, each layer of stirring blades will form an independent circulation, resulting in a partitioned flow phenomenon in the fluid in the reactor, which makes it difficult for the upper and lower solutions in the reactor to mix, affecting the reaction rate.

[0005] Therefore, in order to solve the above technical problems, the present application proposes a stirring device for p-toluenesulfonic acid production. Utility Model Content

[0006] In view of the shortcomings of the prior art, the utility model aims to provide a stirring device for producing p-toluenesulfonic acid.

[0007] To achieve the above object, the utility model provides the following technical solution: a stirring device for producing p-toluenesulfonic acid, comprising a reaction kettle, and also comprising:

[0008] A stirring assembly, which is arranged in a reactor, includes a plurality of screw rods installed in the reactor, and also includes a support seat slidably connected to the reactor through the plurality of screw rods, the plurality of screw rods all penetrate the support seat and are symmetrically arranged about the center of the support seat, and the positions where the plurality of screw rods penetrate the support seat are all threadedly connected with driven gears, the plurality of driven gears are all rotatably connected to the support seat, a turntable is rotatably connected to the support seat, the turntable is meshed with a plurality of driven gears through an internal rack arranged on the inner edge surface, and the plurality of driven gears are all meshed with driving gears, the driving gear is rotatably connected to the support seat, and a motor is installed in the support seat, and the driving end of the motor extends out of the support seat and is connected to the driving gear.

[0009] Preferably, a plurality of stirring blades A are evenly arranged on the outer edge surface of the turntable to enhance the stirring of the raw materials in the reactor.

[0010] Preferably, the number of the screw rods may be 2, and the screw rods are symmetrically arranged to ensure the stability of the support base during operation.

[0011] Preferably, one end of a connecting shaft is mounted on the surface of the driving gear, and the other end of the connecting shaft extends out of the turntable and is connected to a stirring blade B, and the stirring blade B can move in the reverse direction when driven by the motor.

[0012] Preferably, the reactor comprises a sealing cover and a discharge pipe arranged on the reactor, and the sealing cover is provided with a feed port for conveying raw materials, so as to facilitate the entry and exit of raw materials in the reactor.

[0013] Preferably, the reactor is also provided with a support frame for supporting the reactor.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. In the utility model, through the stirring assembly arranged in the reactor, the motor drives the driven gear to rotate through the driving gear, and the driven gear drives the turntable to rotate at the same time, so that the stirring blades A around the turntable rotate to stir the solution in the reactor, and when the driven gear rotates, under the action of the screw rod, the support seat drives the turntable to make vertical movement on the screw rod, so that the turntable drives the stirring blades A to stir up and down in the reactor, and under the drive of the turntable, the solution at the bottom can be mixed with the solution at the upper layer, so as to achieve the fusion of the upper and lower layer solutions, thereby solving the problem in the prior art that the density difference between toluene and concentrated sulfuric acid is large, stratification in the reactor is caused, and the reaction is not easy.

[0016] 2. In the utility model, the motor drives the turntable to move in the reactor through the screw through the cooperation of the driving gear and the driven gear. At the same time, with the cooperation of the internal rack and the driven gear, the turntable rotates on the support seat, driving the stirring blade A to rotate in the reactor to stir the solution in the reactor. One drive realizes two driving modes, which can save resources and reduce production costs.

[0017] 3. In the utility model, through the connecting shaft set on the driving gear, the motor drives the stirring component to rotate, and the stirring blade B is driven by the connecting shaft to rotate in the opposite direction to the stirring blade, thereby disrupting the vortex formed when the stirring blade A rotates, avoiding the material from flowing in the form of radial flow, forming a dead zone in the reactor, and reducing the stirring efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the reaction kettle in the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the support base in the utility model;

[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the stirring component in the present utility model.

[0023] 1. Reactor; 2. Sealing cover; 3. Support frame; 4. Stirring assembly; 41. Support seat; 42. Turntable; 43. Screw; 44. Driven gear; 45. Driving gear; 5. Stirring blade A; 6. Stirring blade B; 7. Connecting shaft; 8. Internal rack; 9. Motor; 10. Feed inlet; 11. Discharge pipe. DETAILED DESCRIPTION

[0024] like Figure 1-4 As shown, the utility model provides a stirring device for p-toluenesulfonic acid production, comprising a reaction kettle 1, and also comprising:

[0025] A stirring assembly 4, which is arranged in the reactor 1. The stirring assembly 4 includes a plurality of screw rods 43 installed in the reactor 1, and also includes a support seat 41 slidably connected to the reactor 1 through the plurality of screw rods 43. The plurality of screw rods 43 all penetrate the support seat 41 and are symmetrically arranged at the center of the support seat 41. The positions where the plurality of screw rods 43 penetrate the support seat 41 are all threadedly connected with driven gears 44. The plurality of driven gears 44 are all rotatably connected to the support seat 41. The support seat 41 is rotatably connected with a turntable 42. The turntable 42 is meshed with the plurality of driven gears 44 through an inner rack 8 arranged on the inner edge surface. The plurality of driven gears 44 are all meshed with a driving gear 45. The driving gear 45 is rotatably connected to the support seat 41. A motor 9 is installed in the support seat 41. The driving end of the motor 9 extends out of the support seat 41 and is connected to the driving gear 45.

[0026] In summary, the driving gear 45 is driven to rotate by the motor 9, and the driving gear 45 drives the meshing driven gear 44 to rotate, so that the driven gear 44 moves on the screw rod 43, so that the support seat 41 drives the turntable 42 to move in the reactor 1. When the turntable 42 and the support seat 41 move up and down, the solutions in the reactor 1 in the upper and lower layers will blend with each other. At the same time, the driven gear 44 drives the turntable 42 to rotate through the inner rack 8. Since the outer edge surface of the turntable 42 is evenly provided with a plurality of stirring blades A5, the turntable 42 can also drive the plurality of stirring blades A5 to stir the solution in the reactor 1 while rotating, thereby enhancing the stirring effect of the solution and accelerating the mixing rate between the solutions.

[0027] The reactor 1 is also provided with a support frame 3 for supporting the reactor 1. The reactor 1 includes a sealing cover 2 and a discharge pipe 11 provided on the reactor 1. The sealing cover 2 is provided with a feed port 10 for facilitating the transportation of raw materials.

[0028] When it is necessary to produce p-toluenesulfonic acid, toluene and concentrated sulfuric acid are first injected into the reactor 1. After the injection is completed, the motor 9 is started to rotate forward, and the motor 9 drives the driving gear 45 to rotate. The driving gear 45 drives the turntable 42 with an inner rack 8 on the inner edge surface to rotate reversely through the driven gear 44. The stirring blade A5 arranged on the turntable 42 reversely stirs the solution in the reactor 1. At the same time, one end of the connecting shaft 7 is installed on the surface of the driving gear 45, and the other end of the connecting shaft 7 extends out of the turntable 42 and is connected with the stirring blade B6. When the driving gear 45 rotates, the stirring blade B6 is also driven to rotate to stir the solution in the reactor 1 in the forward direction. By rotating the stirring blade B6 in the opposite direction to the stirring blade A5, the vortex formed in the reactor 1 when the stirring blade A5 rotates can be slowed down, the wear of the internal devices caused by the large vortex is reduced, and the dead zone in the reactor 1 caused by the vortex rotation force is reduced, thereby enhancing the reaction rate of the solution;

[0029] At the same time, when the motor 9 drives the turntable 42 to rotate, the support seat 41 rotatably connected to the driven gear 44 drives the turntable 42 to move upward under the drive of the screw rod 43 threadedly connected to the driven gear 44, so that the lower layer solution in the reactor 1 moves upward under the drive of the turntable 42, thereby enhancing the mixing effect of the two layers of solution. The number of the screw rods 43 can be 2, and the screw rods 43 are symmetrically arranged, which can ensure the stability of the support seat 41 during operation;

[0030] When the support seat 41 drives the turntable 42 to rotate to the set height, the motor 9 pauses. After a period of rest, the motor 9 reverses, and the stirring blade B6 rotates in the opposite direction driven by the motor 9, and the stirring blade A5 rotates forward driven by the turntable 42, and continues to stir the solution in the reactor 1 in the opposite direction, reducing the possibility of forming a continuous vortex inside and enhancing the stirring effect. The support seat 41 drives the turntable 42 to move downward, driving the upper layer of the solution downward, further enhancing the mixing effect of the two layers of solution, accelerating the mixing and reaction of toluene and concentrated sulfuric acid, and facilitating the completion of subsequent steps.

[0031] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A stirring device for producing p-toluenesulfonic acid, comprising a reaction kettle (1), characterized in that: Also includes: A stirring assembly (4), wherein the stirring assembly (4) is arranged in a reaction kettle (1), the stirring assembly (4) comprises a plurality of screw rods (43) installed in the reaction kettle (1), and also comprises a support seat (41) slidably connected to the reaction kettle (1) through the plurality of screw rods (43), the plurality of screw rods (43) all penetrate the support seat (41) and are arranged symmetrically about the center of the support seat (41), and the positions where the plurality of screw rods (43) penetrate the support seat (41) are all threadedly connected to driven gears (44), and the plurality of driven gears (44) are all The support base (41) is rotatably connected to a rotating disk (42), the rotating disk (42) is meshedly connected to a plurality of driven gears (44) via an inner rack (8) arranged on an inner edge surface, and the plurality of driven gears (44) are meshedly connected to a driving gear (45), the driving gear (45) is rotatably connected to the support base (41), and a motor (9) is installed in the support base (41), and the driving end of the motor (9) extends out of the support base (41) and is connected to the driving gear (45).

2. A stirring device for producing p-toluenesulfonic acid according to claim 1, characterized in that: A plurality of stirring blades A (5) are evenly arranged on the outer edge surface of the rotating disk (42).

3. A stirring device for producing p-toluenesulfonic acid according to claim 2, characterized in that: The number of the screw rods (43) may be 2.

4. A stirring device for producing p-toluenesulfonic acid according to claim 3, characterized in that: One end of a connecting shaft (7) is mounted on the surface of the driving gear (45), and the other end of the connecting shaft (7) extends out of the rotating disk (42) and is connected to a stirring blade B (6).

5. A stirring device for producing p-toluenesulfonic acid according to claim 4, characterized in that: The reaction kettle (1) comprises a sealing cover (2) and a discharge pipe (11) arranged on the reaction kettle (1), and the sealing cover (2) is provided with a feed port (10) for facilitating the conveyance of raw materials.

6. A stirring device for producing p-toluenesulfonic acid according to claim 5, characterized in that: The reaction kettle (1) is also provided with a support frame (3) for supporting the reaction kettle (1).

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