Continuous amination reaction device for paranitroaniline
By introducing cleaning components and multi-stage exhaust gas purification devices into the reactor, the problems of incomplete cleaning of the reactor inner wall and direct emission of exhaust gas are solved, achieving efficient cleaning of the reactor inner wall and environmentally friendly treatment of exhaust gas.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2026-03-27
AI Technical Summary
In existing continuous amination reaction devices for p-nitroaniline, the cleaning efficiency of the inner wall of the reactor is low, making it difficult to clean thoroughly, and the direct emission of exhaust gas causes environmental pollution.
The reactor uses a cleaning assembly, including a motor-driven rotating shaft and a cleaning brush, combined with a telescopic rod and spring design, to achieve comprehensive cleaning of the inner wall of the reactor; the exhaust gas is purified through a multi-stage filtration assembly, including filter plates, activated carbon adsorption plates and molecular sieve adsorption plates.
It improves the cleaning efficiency and comprehensiveness of the reactor, reduces environmental pollution, and enhances the purification effect of exhaust gas.
Smart Images
Figure CN224040932U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to nitroaniline technical field especially relates to the continuous aminylation reaction device of nitroaniline. BACKGROUND
[0002] Nitroaniline is a key raw material for many important chemical products, and its continuous aminylation reaction can achieve large-scale and high-efficiency production, which is crucial for the development of the chemical industry. This reaction device is usually used to produce various fine chemical products, for example, in the synthesis process of dyes, nitroaniline can be converted into dye intermediates with different properties and color by aminylation reaction, and in the pharmaceutical field, compounds with specific pharmacological activity can be synthesized, and in pesticide synthesis, it can provide basic raw materials for the preparation of active ingredients of pesticides. Therefore, the performance and efficiency of the continuous aminylation reaction device of nitroaniline directly affect the quality and cost of many downstream products.
[0003] In the existing continuous aminylation reaction device of nitroaniline, a kettle reactor is usually used for reaction. The material is transported to the kettle reactor through the feed pipe, and the raw material in the reaction kettle is stirred by stirring paddle or impeller to fully mix the material. The reaction process is heated by heating jacket or internal heating device to provide the heat required for the reaction, and the temperature is adjusted by external cooling system to prevent the reaction temperature from being too high or too low. The reaction mainly depends on the mixing of the material and the temperature, pressure and other conditions in the reaction kettle, and the corresponding catalyst, which follows the principles of chemical kinetics and thermodynamics. After the reaction is completed, the product is discharged through the discharge pipe for subsequent separation and purification operation.
[0004] Because the reaction in the reaction kettle is a complex chemical synthesis reaction, a large amount of reaction residue, by-products and other impurities are often left on the inner wall of the reaction kettle after the reaction is completed. The traditional cleaning method usually only uses a simple high-pressure water gun to wash or manually uses a brush to clean, which is low in efficiency. Therefore, the continuous aminylation reaction device of nitroaniline is proposed to solve the above problems. UTILITY MODEL CONTENT
[0005] In order to make up for the above shortcomings, the utility model provides a continuous aminylation reaction device of nitroaniline, which aims to improve the problem of single cleaning method and difficult to clean comprehensively during cleaning of the reaction kettle in the prior art.
[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0007] The utility model provides a continuous amine reaction device of nitroaniline, including reaction kettle, reaction kettle side wall is provided with motor, rotation axis is connected in reaction kettle inside, motor output and rotation axis are connected, reaction kettle inside is provided with cleaning assembly, rotation axis side wall is fixedly connected with stirring blade no.
[0008] Cleaning assembly includes connecting frame, connecting frame side wall is fixedly connected in rotation axis side wall, connecting frame side wall is provided with cleaning brush, cleaning brush side wall is fixedly connected with telescopic link, telescopic link side wall is fixedly connected in connecting frame inside, telescopic link side wall is equipped with spring, reaction kettle side wall is provided with water tank, water tank side wall is provided with water pump, water pump input is fixedly connected with fixed pipe, fixed pipe side wall is fixedly connected in water tank side wall, water pump output is fixedly connected with connecting pipe, reaction kettle inside is fixedly connected with fixed plate, fixed plate inside is fixedly connected with delivery pipe, connecting pipe side wall is fixedly connected in delivery pipe side wall, delivery pipe side wall is fixedly connected with shower head.
[0009] As a further description of the above technical solutions:
[0010] The filter assembly includes an exhaust pipe, and the exhaust pipe is fixedly connected to the side wall of the reaction kettle.
[0011] As a further description of the above technical solutions:
[0012] The side wall of the exhaust pipe is fixedly connected to an output pipe, and the side wall of the reaction kettle is fixedly connected to a fixing frame.
[0013] As a further description of the above technical solutions:
[0014] The side wall of the fixing frame is fixedly connected to a filter box, and the side wall of the filter box is provided with a box door.
[0015] As a further description of the above technical solutions:
[0016] The side wall of the output pipe is fixedly connected to the inside of the filter box, and the inside of the filter box is fixedly connected to a sliding groove frame.
[0017] As a further description of the above technical solutions:
[0018] The inside of the sliding groove frame is slidably connected to a filter plate and an activated carbon adsorption plate.
[0019] As a further description of the above technical solutions:
[0020] The inside of the sliding groove frame is slidably connected to a molecular sieve adsorption plate, and the side wall of the filter box is fixedly connected to an exhaust pipe.
[0021] As a further description of the above technical solution:
[0022] One end of the spring is fixedly connected inside the connecting frame, and the other end of the spring is fixedly connected to the side wall of the telescopic rod.
[0023] This utility model has the following beneficial effects:
[0024] 1. In this utility model, the water pump is started to draw water from the water tank to the connecting pipe through the fixed pipe, and then sprays it out through the nozzle on the side wall of the delivery pipe. The motor is started to drive the rotating shaft, which drives the connecting frame to rotate. The cleaning brush on the side wall of the connecting frame cleans the inner wall of the reactor. The cleaning brush is connected to the connecting frame through the telescopic rod. When squeezed, the telescopic rod slides in the connecting frame and squeezes the spring. The spring rebounds and makes the cleaning brush stick to the wall. When the rotating shaft rotates, the first and second stirring blades are cleaned in the water. This solves the problem of the single cleaning method and difficulty in cleaning the reactor. The above technical solution improves the comprehensiveness of reactor cleaning.
[0025] 2. In this utility model, after the reaction is completed, the pressure inside the reactor is first adjusted to a safe range by a pressure control device. Then, the tail gas enters the filter box through the tail gas pipe and the output pipe. The filter plate in the box initially filters the tail gas, followed by the activated carbon adsorption plate and the molecular sieve adsorption plate for purification in sequence. Finally, the filtered tail gas is discharged through the exhaust pipe. When the filter plate needs to be replaced, it can be pulled out from the sliding frame by opening the box door. This solves the problem of environmental pollution caused by direct discharge of tail gas. The above technical solution improves the tail gas purification effect. Attached Figure Description
[0026] Figure 1 This is a three-dimensional schematic diagram of the continuous amination reaction apparatus for p-nitroaniline proposed in this utility model;
[0027] Figure 2 This is a schematic diagram of the internal structure of the tank in the continuous amination reaction apparatus for p-nitroaniline proposed in this utility model.
[0028] Figure 3 This is a schematic diagram of the stirrer structure of the continuous amination reaction apparatus for p-nitroaniline proposed in this utility model;
[0029] Figure 4 for Figure 3 Enlarged view of point A in the middle;
[0030] Figure 5 This is a schematic diagram of the internal structure of the filter box in the continuous amination reaction apparatus for p-nitroaniline proposed in this utility model.
[0031] Legend:
[0032] 1, reactor; 2, motor; 3, rotating shaft; 4, stirring blade one; 5, stirring blade two; 6, connecting frame; 7, cleaning brush; 8, telescopic rod; 9, spring; 10, water tank; 11, water pump; 12, fixed pipe; 13, connecting pipe; 14, conveying pipe; 15, fixed plate; 16, spray head; 17, tail gas pipe; 18, output pipe; 19, fixing frame; 20, filter box; 21, box door; 22, filter plate; 23, activated carbon adsorption plate; 24, molecular sieve adsorption plate; 25, exhaust pipe; 26, chute frame. DETAILED DESCRIPTION
[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0034] Reference Figure 1 Figure 4 An embodiment provided by the present application: a continuous amination reaction device for p-nitroaniline, comprising a reactor 1, a motor 2 is arranged on the side wall of the reactor 1, a rotating shaft 3 is rotatably connected in the reactor 1, the output end of the motor 2 is connected with the rotating shaft 3, a cleaning assembly is arranged in the reactor 1, stirring blade one 4 is fixedly connected on the side wall of the rotating shaft 3, stirring blade two 5 is fixedly connected on the side wall of the rotating shaft 3, and a filtering assembly is arranged on the side wall of the reactor 1; the cleaning assembly comprises a connecting frame 6, the connecting frame 6 is fixedly connected on the side wall of the rotating shaft 3, a cleaning brush 7 is arranged on the side wall of the connecting frame 6, the cleaning brush 7 is used for cleaning the inner wall of the reactor 1, a telescopic rod 8 is fixedly connected on the side wall of the cleaning brush 7, the telescopic rod 8 is fixedly connected in the connecting frame 6, a spring 9 is sleeved on the side wall of the telescopic rod 8, the spring 9 is used for elastic return, a water tank 10 is arranged on the side wall of the reactor 1, a water pump 11 is arranged on the side wall of the water tank 10, a fixed pipe 12 is fixedly connected on the input end of the water pump 11 and on the side wall of the water tank 10, a connecting pipe 13 is fixedly connected on the output end of the water pump 11, a fixed plate 15 is fixedly connected in the reactor 1, a conveying pipe 14 is fixedly connected in the fixed plate 15, the connecting pipe 13 is fixedly connected on the side wall of the conveying pipe 14, a spray head 16 is fixedly connected on the side wall of the conveying pipe 14, one end of the spring 9 is fixedly connected in the connecting frame 6, and the other end of the spring 9 is fixedly connected on the side wall of the telescopic rod 8.
[0035] After the device is used, the water pump 11 is started, and the water pump 11 is used to provide power to pump out the water in the water tank 10. The water tank 10 is used to store cleaning water to provide water source guarantee for the whole cleaning process. The pumped-out water is transported into the connecting pipe 13 through the fixed pipe 12. The connecting pipe 13 is responsible for transferring the water from the fixed pipe 12 to the delivery pipe 14. The delivery pipe 14 is fixed in the reaction kettle 1 through the fixed plate 15. The fixed plate 15 fixes the delivery pipe 14 at a specific position in the reaction kettle 1, so that the delivery pipe 14 does not displace during the cleaning process, stably supplies water to the spray head 16, and uniformly sprays the water flow on the inner wall of the reaction kettle 1 to achieve the preliminary wetting and flushing of the inner wall of the reaction kettle 1, so as to remove part of the impurities attached to the wall. At this time, the motor 2 is started, and the motor 2 provides power source for the rotating part of the whole cleaning device, drives the rotating shaft 3 to rotate, and transmits the rotating power of the motor 2 to the connecting frame 6, the stirring blade one 4 and the stirring blade two 5. The rotating shaft 3 drives the connecting frame 6 to rotate, and the connecting frame 6 supports and connects the cleaning brush 7, so that the cleaning brush 7 can rotate with the rotating shaft 3 to clean the inner wall of the reaction kettle 1. The cleaning brush 7 is connected with the connecting frame 6 through the telescopic rod 8. The telescopic rod 8 can adjust the position of the cleaning brush 7 according to the actual situation of the inner wall of the reaction kettle 1. When the cleaning brush 7 is pressed, the telescopic rod 8 slides in the connecting frame 6 to press the spring 9. The spring 9 plays a buffering and resetting role. When the cleaning brush 7 is resisted by the inner wall of the reaction kettle 1, the spring 9 is compressed to store elastic potential energy. When the spring 9 rebounds, the cleaning brush 7 is tightly attached to the inside of the reaction kettle 1, so that the cleaning brush 7 always contacts with the inner wall of the reaction kettle 1 to effectively remove stains. While the rotating shaft 3 rotates, the stirring blade one 4 and the stirring blade two 5 rotate in the water to clean. The stirring blade one 4 and the stirring blade two 5 can form water flow disturbance in the water to enhance the washing effect of the water, further assist to clean the residual impurities in the reaction kettle 1, and make the cleaning process more comprehensive and efficient.
[0036] With reference to Figure 1 and Figure 5 , the filtering assembly includes a tail gas pipe 17 fixedly connected to the side wall of the reaction kettle 1. The side wall of the tail gas pipe 17 is fixedly connected with an output pipe 18. The side wall of the reaction kettle 1 is fixedly connected with a fixed frame 19. The side wall of the fixed frame 19 is fixedly connected with a filter box 20. The side wall of the filter box 20 is provided with a box door 21. The side wall of the output pipe 18 is fixedly connected to the inside of the filter box 20. The inside of the filter box 20 is fixedly connected with a sliding groove frame 26 for providing an installation position for the filtering assembly. The inside of the sliding groove frame 26 is slidably connected with a filter plate 22, an activated carbon adsorption plate 23 and a molecular sieve adsorption plate 24. The side wall of the filter box 20 is fixedly connected with an exhaust pipe 25 for discharging filtered tail gas.
[0037] When the reaction is over, first of all, the pressure in the reaction kettle 1 is adjusted to a safe range by a pressure control device such as a pressure reducing valve, the pressure control device can monitor the pressure in the reaction kettle 1 in real time, and automatically adjust the opening and closing degree of the pressure reducing valve according to the preset safe pressure value, to ensure that the pressure in the reaction kettle 1 decreases smoothly to the safe range, and to provide safety guarantee for subsequent tail gas discharge operation, then the gas containing tail gas is transported to the inside of the output pipe 18 through the tail gas pipe 17, the tail gas pipe 17 is a channel connecting the reaction kettle 1 and the output pipe 18, to ensure that the tail gas is discharged from the reaction kettle 1, and the output pipe 18 further transports the tail gas to the filter box 20, the filter box 20 is a device for purifying tail gas, and the filter box 20 is provided with a filter plate 22 inside, the filter plate 22 is mainly used for primary filtering of the tail gas, it can intercept larger particles of impurities, dust and the like in the tail gas, through physical interception, to reduce the burden of subsequent filtering links, the tail gas is first filtered and then adsorbed by the activated carbon adsorption plate 23, the activated carbon adsorption plate 23 has a microporous structure, and can use the principle of physical adsorption to adsorb organic pollutants, odor molecules and the like in the tail gas on its surface, after being treated by the activated carbon adsorption plate 23, the concentration of harmful components in the tail gas is greatly reduced, to further improve the purification degree of the tail gas, and then pass through the last molecular sieve adsorption plate 24, the molecular sieve adsorption plate 24 can selectively adsorb according to the size and shape of molecules by virtue of its microporous structure, it can effectively adsorb small molecular impurities such as carbon dioxide and moisture remaining in the tail gas, through screening and electrostatic adsorption, to deeply purify the tail gas, and finally the filtered tail gas is discharged through the exhaust pipe 25, when it is necessary to replace the filter components inside the filter box 20, the box door 21 is opened, the box door 21 facilitates the operator to enter the inside of the filter box 20 to perform maintenance and component replacement work, after the box door 21 is opened, the filter components can be pulled out from the inside of the sliding slot frame 26 for replacement, the sliding slot frame 26 provides installation positions for the filter components, and at the same time, when the filter components are replaced, the filter components can be smoothly pulled out and inserted along the sliding slot, to improve the working efficiency of replacing the filter components and reduce the equipment downtime.
[0038] Working principle: after the equipment is used, the water pump 11 is started to pump the water in the water tank 10 out through the fixed pipe 12, to the connecting pipe 13, and then to the delivery pipe 14, the delivery pipe 14 is fixed in the reaction kettle 1 through the fixed plate 15, the water is sprayed out from the nozzle 16 fixed on the side wall of the delivery pipe 14, and then the motor 2 is started to drive the rotating shaft 3 to rotate, the rotating shaft 3 drives the connecting frame 6 to rotate, so that the cleaning brush 7 fixed on the side wall of the connecting frame 6 cleans the inner wall of the reaction kettle 1, the cleaning brush 7 is connected with the connecting frame 6 through the telescopic rod 8, when the cleaning brush 7 is pressed, the telescopic rod 8 slides in the connecting frame 6 to press the spring 9, and the spring 9 rebounds to make the cleaning brush 7 stick to the inside of the reaction kettle 1, the rotating shaft 3 rotates at the same time, the stirring blade one 4 and the stirring blade two 5 rotate in the water to clean.
[0039] When the reaction is finished, first, the pressure in the reactor 1 is adjusted to a safe range by a pressure control device such as a pressure reducing valve, then the gas containing tail gas is delivered into the output pipe 18 through the tail gas pipe 17, and then into the filter box 20, the filter box 20 is provided with a filter plate 22, the tail gas is first filtered and then adsorbed by the activated carbon adsorption plate 23, and then passes through the last molecular sieve adsorption plate 24, and finally the filtered tail gas is discharged through the exhaust pipe 25, when the filter assembly in the filter box 20 needs to be replaced, the box door 21 is opened to take it out from the chute frame 26 for replacement.
[0040] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.
Claims
1. A device for continuous amination of p-nitroaniline, comprising a reactor (1), characterized in that: The side wall of the reaction kettle (1) is provided with a motor (2), the inside of the reaction kettle (1) is rotatably connected with a rotating shaft (3), the output end of the motor (2) is connected with the rotating shaft (3), the inside of the reaction kettle (1) is provided with a cleaning assembly, the side wall of the rotating shaft (3) is fixedly connected with stirring blade one (4), the side wall of the rotating shaft (3) is fixedly connected with stirring blade two (5), and the side wall of the reaction kettle (1) is provided with a filtering assembly. The cleaning assembly comprises a connecting frame (6), the side wall of the connecting frame (6) is fixedly connected to the side wall of the rotating shaft (3), the side wall of the connecting frame (6) is provided with a cleaning brush (7), the side wall of the cleaning brush (7) is fixedly connected with a telescopic rod (8), the side wall of the telescopic rod (8) is fixedly connected to the inside of the connecting frame (6), the side wall of the telescopic rod (8) is sleeved with a spring (9), the side wall of the reaction kettle (1) is provided with a water tank (10), the side wall of the water tank (10) is provided with a water pump (11), the input end of the water pump (11) is fixedly connected with a fixed pipe (12), the side wall of the fixed pipe (12) is fixedly connected to the side wall of the water tank (10), the output end of the water pump (11) is fixedly connected with a connecting pipe (13), the inside of the reaction kettle (1) is fixedly connected with a fixed plate (15), the inside of the fixed plate (15) is fixedly connected with a conveying pipe (14), the side wall of the connecting pipe (13) is fixedly connected to the side wall of the conveying pipe (14), and the side wall of the conveying pipe (14) is fixedly connected with a spray head (16).
2. The apparatus for continuous amination of p-nitroaniline according to claim 1, characterized in that: The filtering assembly comprises a tail gas pipe (17), and the side wall of the tail gas pipe (17) is fixedly connected to the side wall of the reaction kettle (1).
3. The apparatus for continuous amination of p-nitroaniline according to claim 2, characterized in that: The side wall of the tail gas pipe (17) is fixedly connected with an output pipe (18), and the side wall of the reaction kettle (1) is fixedly connected with a fixed frame (19).
4. The apparatus for continuous amination of p-nitroaniline according to claim 3, characterized in that: The side wall of the fixed frame (19) is fixedly connected with a filter box (20), and the side wall of the filter box (20) is provided with a box door (21).
5. The apparatus for continuous amination of p-nitroaniline according to claim 4, characterized in that: The side wall of the output pipe (18) is fixedly connected to the inside of the filter box (20), and the inside of the filter box (20) is fixedly connected with a chute frame (26).
6. The apparatus for continuous amination of p-nitroaniline according to claim 5, characterized in that: The inside of the chute frame (26) is slidably connected with a filter plate (22), the inside of the chute frame (26) is slidably connected with an activated carbon adsorption plate (23).
7. The apparatus for continuous amination of p-nitroaniline according to claim 6, characterized in that: The inside of the chute frame (26) is slidably connected with a molecular sieve adsorption plate (24), and the side wall of the filter box (20) is fixedly connected with an exhaust pipe (25).
8. The apparatus for continuous amination of p-nitroaniline according to claim 1, characterized by: One end of the spring (9) is fixedly connected to the inside of the connecting frame (6), and the other end of the spring (9) is fixedly connected to the side wall of the telescopic rod (8).