Reaction kettle for producing paranitroaniline

Abstract

The utility model discloses a reaction kettle for paranitroaniline production, which comprises a reaction kettle main body and an inner cylinder, the center of the inner bottom of the reaction kettle main body is rotatably connected with a main stirring rod, the surface of the main stirring rod is fixedly connected with an auger blade, the inner side wall of the inner cylinder is fixedly connected with a heating inner container, and the top end of the reaction kettle main body is provided with a top cover. An auxiliary stirring rod is rotationally connected to the center of the inner bottom of the top cover, and the main stirring rod and the auxiliary stirring rod rotate in opposite directions; through the arrangement of the inner cylinder and the auger blade, the materials rotate and rise along the inner wall of the heating inner container, so that the contact area of the materials and a heating area is increased, and the heating efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, specifically a reaction vessel for the production of p-nitroaniline. Background Technology

[0002] p-Nitroaniline is an important chemical intermediate with wide applications in the dye industry and chemical synthesis. The production of p-nitroaniline is usually carried out in a reaction vessel, which can meet the various physical and chemical reactions of the internal chemical raw materials and provide a stable production environment.

[0003] Existing reactors typically incorporate heating and stirring components for internal mixing and heating. However, the excessively high flow rate of p-nitroaniline during stirring results in insufficient contact time with the heating components, leading to prolonged heating times and low efficiency. Furthermore, the stirring process is generally carried out in one direction, which can cause vortices to form within the stirring tank over extended periods, hindering the thorough dispersion of the material. Therefore, a new technical solution is needed to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide a reaction vessel for the production of p-nitroaniline, which solves the problems mentioned in the background art, such as excessively fast material flow rate, short contact time with heating components, resulting in long heating time and low efficiency, and the fact that stirring is generally carried out in one direction during the stirring process, which can easily cause the material to form vortices in the stirring tank for a long time, making it difficult for the material to be fully dispersed.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reaction vessel for the production of p-nitroaniline, comprising a reaction vessel body and an inner cylinder, wherein a main stirring rod is rotatably connected to the center of the bottom of the reaction vessel body, and an auger blade is fixedly connected to the surface of the main stirring rod; a heating inner liner is fixedly connected to the inner side wall of the inner cylinder; a top cover is provided at the top of the reaction vessel body, and a secondary stirring rod is rotatably connected to the center of the bottom of the top cover; the main stirring rod and the secondary stirring rod rotate in opposite directions.

[0006] In this technical solution, the outer surface of the main stirring rod is equipped with auger blades. During the rotation of the stirring rod, the material is driven to spiral upward along the auger blades, thereby increasing the contact area and time between the material and the heating zone, and improving the heating efficiency. The main stirring rod and the auxiliary stirring rod rotate in opposite directions, thus driving their respective stirring plates to rotate, forming a counter-current. During the rotation of the stirring plates, the material is stirred, preventing the material from flowing in one direction for a long time and causing it to accumulate and not disperse, thereby improving the processing efficiency.

[0007] Preferably, a lower support rod is fixedly connected to the outer surface of the main stirring rod below the auger blade, and an upper support rod is fixedly connected to the outer surface of the auxiliary stirring rod. The upper and lower support rods are parallel to each other. A stirring plate is fixedly connected to the top surface of the left and right edges of the lower support rod and the bottom surface of the left and right edges of the upper support rod. The surface of the stirring plate is evenly provided with several through holes.

[0008] Preferably, a second servo motor and a first servo motor are fixedly connected to the center of the top of the top cover and the center of the bottom of the reactor body, respectively, and the output ends of the drive shafts of the first servo motor and the second servo motor are fixedly connected to the main stirring rod and the auxiliary stirring rod, respectively.

[0009] Preferably, the left and right inner walls of the reactor body are fixedly connected with crossbars, and the left and right outer walls of the inner cylinder are fixedly connected to the crossbars on both sides respectively.

[0010] Preferably, a power supply box is fixedly connected to the outer wall of the main body of the reactor, and the power supply box is connected to the heating inner liner by an electric wire.

[0011] Preferably, the inner wall of the reactor body is fixedly connected with several heating plates in a circumferential array, and both the heating plates and the interior of the heating liner are equipped with heating wires.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model has an inner cylinder set inside the main body of the reactor, and auger blades are provided on the outer surface of the main stirring rod. During the rotation of the stirring rod, the material is driven to spiral upward along the auger blades, thereby increasing the contact area and time between the material and the heating area and improving the heating efficiency.

[0014] 2. This utility model, by setting a main stirring rod and an auxiliary stirring rod, with the main stirring rod and the auxiliary stirring rod rotating in opposite directions, drives their respective stirring plates to rotate. During the rotation of the stirring plates, the stirring plates will stir the material, avoiding the material from flowing in one direction for a long time and causing it to accumulate and not disperse, thereby improving the processing efficiency. Attached Figure Description

[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0016] Figure 1 This is an overall view of the present invention;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0018] In the diagram: 1. Reactor body; 101. Top cover; 2. Crossbar; 3. Inner cylinder; 4. Heating inner liner; 5. Main stirring rod; 501. Servo motor No. 1; 6. Screwdriver blade; 7. Secondary stirring rod; 701. Servo motor No. 2; 8. Lower support rod; 9. Upper support rod; 10. Stirring plate; 11. Through hole; 12. Power supply box; 13. Heating plate. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description will further elaborate on them in conjunction with specific embodiments.

[0020] A reaction vessel for the production of p-nitroaniline, see [link to relevant documentation]. Figures 1 to 2 The reactor includes a reactor body 1 and an inner cylinder 3. A main stirring rod 5 is rotatably connected to the center of the bottom of the reactor body 1. A screw conveyor blade 6 is fixedly connected to the surface of the main stirring rod 5. A heating inner liner 4 is fixedly connected to the inner side wall of the inner cylinder 3. A top cover 101 is provided at the top of the reactor body 1. A secondary stirring rod 7 is rotatably connected to the center of the bottom of the top cover 101. The main stirring rod 5 and the secondary stirring rod 7 rotate in opposite directions. The bottom of the secondary stirring rod 7 is located inside the top of the main stirring rod 5, but does not contact the main stirring rod 5 to avoid affecting each other's rotation.

[0021] Specifically, such as Figure 2 As shown, a lower support rod 8 is fixedly connected to the outer surface of the main stirring rod 5 below the auger blade 6, and an upper support rod 9 is fixedly connected to the outer surface of the auxiliary stirring rod 7. The upper support rod 9 and the lower support rod 8 are parallel to each other. Agitating plates 10 are fixedly connected to the top surfaces of the left and right edges of the lower support rod 8 and the bottom surfaces of the left and right edges of the upper support rod 9. The upper and lower agitating plates 10 are the same size and are located on the outside of the inner cylinder 3. During the rotation, they drive the material to turn over. Since the rotation direction is opposite, it can avoid the material from rotating in one direction for a long time and not dispersing. Several through holes 11 are evenly opened on the surface of the agitating plate 10. The through holes 11 facilitate the passage of material and avoid the agitating plate 10 from having too much resistance and making it difficult to rotate.

[0022] It is worth noting that, such as Figure 2 As shown, a second servo motor 701 and a first servo motor 501 are fixedly connected to the center of the top of the top cover 101 and the center of the bottom of the reactor body 1, respectively. The output ends of the drive shafts of the first servo motor 501 and the second servo motor 701 are fixedly connected to the main stirring rod 5 and the auxiliary stirring rod 7, respectively. The first servo motor 501 and the second servo motor 701 are of the same model, so their speeds are also the same, only their rotation directions are opposite, so that the upper and lower stirring plates 10 rotate in opposite directions, making the material more evenly stirred.

[0023] It is worth noting that, such as Figure 2As shown, the left and right inner walls of the reactor body 1 are fixedly connected with crossbars 2, and the left and right outer walls of the inner cylinder 3 are fixedly connected with the crossbars 2 on both sides. The crossbars 2 are mainly used to support the inner cylinder 3, so that the inner cylinder 3 is suspended inside the reactor body 1, avoiding affecting the upper support rod 9 and the lower support rod 8.

[0024] It is worth noting that, such as Figure 1 and Figure 2 As shown, a power supply box 12 is fixedly connected to the outer wall of the reactor body 1. The power supply box 12 is equipped with a power socket. After connecting the external wire, it supplies power to the heating plate 13 and the heating inner liner 4 inside the reactor body 1, so that they heat up to heat the material. The power supply box 12 and the heating inner liner 4 are connected by a wire. This wire is located inside the crossbar 2, so it will not be exposed in the material and cause the outer skin to be corroded.

[0025] It is worth noting that, such as Figure 2 As shown, the inner wall of the reactor body 1 is fixedly connected with several heating plates 13 in a circumferential array. Both the heating plates 13 and the heating inner liner 4 are equipped with heating wires. The heating plates 13 heat the material on the outermost side, while the heating inner liner 4 heats the material that spirals through. The two work together to heat the material, which improves the heating efficiency. Both the heating plates 13 and the heating inner liner 4 are made of corrosion-resistant materials, which can avoid the corrosive effects of the material.

[0026] Working principle: After starting the No. 1 servo motor 501 and the No. 2 servo motor 701, the main stirring rod 5 and the auxiliary stirring rod 7 rotate in opposite directions. The auger blades 6 on the surface of the main stirring rod 5 spirally lift the material along the inner wall of the heating inner liner 4, extending the residence time of the material in the heating area. At the same time, the heating inner liner 4 and the heating plates 13 arranged in a circular array on the inner side of the reactor body 1 work together to heat the material and improve the heat transfer efficiency. The auxiliary stirring rod 7 drives the upper support rod 9 and the stirring plate 10 to rotate in the opposite direction, forming a counteracting effect with the lower support rod 8 and the stirring plate 10 of the main stirring rod 5. The material is dispersed through the through holes 11 on the surface of the stirring plate 10, avoiding the accumulation problem caused by unidirectional vortex. The material is fully dispersed under the bidirectional stirring action and continuously contacts the heating area through the spiral motion of the auger blades 6, ultimately achieving efficient and uniform heating and mixing. The power supply box 12 provides stable power to the heating inner liner 4 and the heating plate 13. The crossbar 2 ensures that the inner cylinder 3 is stably suspended, ensuring smooth operation of the stirring mechanism.

[0027] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0028] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A reaction vessel for p-nitroaniline production, comprising a reaction vessel main body (1) and an inner cylinder (3), characterized in that: The inner bottom central rotation of the reaction kettle body (1) is connected with the main stirring rod (5), the surface of the main stirring rod (5) is fixedly connected with the auger blade (6), the inner side wall of the inner cylinder (3) is fixedly connected with the heating liner (4), the top end of the reaction kettle body (1) is provided with the top cover (101), the inner bottom central rotation of the top cover (101) is connected with the auxiliary stirring rod (7), and the rotation directions of the main stirring rod (5) and the auxiliary stirring rod (7) are opposite.

2. The reaction kettle for producing p-nitroaniline according to claim 1, characterized in that: The outer surface of the main stirring rod (5) below the auger blade (6) is fixedly connected with the lower support rod (8), the outer surface of the auxiliary stirring rod (7) is fixedly connected with the upper support rod (9), the upper support rod (9) and the lower support rod (8) are parallel to each other, the top end surface of the left and right two side edges of the lower support rod (8) and the bottom surface of the left and right two side edges of the upper support rod (9) are fixedly connected with the stirring plate (10), and the surface of the stirring plate (10) is uniformly provided with a plurality of through holes (11).

3. The reaction kettle for producing p-nitroaniline according to claim 1, characterized in that: The top end central of the top cover (101) and the bottom central of the reaction kettle body (1) are fixedly connected with the second servo motor (701) and the first servo motor (501) respectively, and the output ends of the transmission shafts of the first servo motor (501) and the second servo motor (701) are fixedly connected with the main stirring rod (5) and the auxiliary stirring rod (7).

4. The reaction kettle for producing p-nitroaniline according to claim 1, characterized in that: The left and right inner side walls of the reaction kettle body (1) are fixedly connected with the cross rods (2), and the left and right outer side walls of the inner cylinder (3) are fixedly connected with the cross rods (2) on the two sides.

5. The reaction kettle for producing p-nitroaniline according to claim 1, characterized in that: The outer side wall of the reaction kettle body (1) is fixedly connected with the power supply box (12), and the power supply box (12) and the heating liner (4) are connected through wires.

6. The reaction kettle for producing p-nitroaniline according to claim 1, characterized in that: The inner side wall of the reaction kettle body (1) is fixedly connected with a plurality of heating plates (13) in a circumferential array, and the inside of the heating plate (13) and the heating liner (4) is provided with an electric heating wire.

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