A mixing kettle for producing N-methylaniline

Abstract

The utility model discloses a kind of mixed kettle for N-methylaniline production, including mixed kettle, the bottom end of the mixed kettle is equipped with discharge port, and circulation pipe is connected between discharge port and the feed inlet of circulating pump, and feed inlet is equipped with feeding port;Two stirring shafts are rotatably installed in the inside of the mixed kettle, and the top end of stirring shaft extends to the outside of the mixed kettle and is equipped with swivel joint, and the circulating pump is equipped with two discharge ports, and feed pipe is equipped between two discharge ports and two swivel joints.The utility model is discharged by setting discharge port in the bottom end of mixed kettle, and it is connected with circulating pump feed inlet by using circulation pipe, while setting feeding port in feed inlet, the circulation injection mixing of material is realized.The material after first mixing can be re-entered into circulating pump for circulation injection again through discharge port and circulation pipe by feed pipe, stirring shaft, stirring branch and spray head spray into mixed kettle, greatly accelerate the material mixing process, significantly improve mixing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of N-methylaniline production technology, and in particular to a mixing reactor for N-methylaniline production. Background Technology

[0002] In the production of N-methylaniline, the mixing reactor, as a key piece of equipment, plays a decisive role in the mixing effect of materials. With the rapid development of the chemical industry, the market demand for both the quantity and quality of N-methylaniline is constantly increasing. Traditional mixing reactors used in N-methylaniline production have revealed many drawbacks in practical applications.

[0003] 1. Conventional mixing vessels rely solely on simple stirring devices for material mixing, resulting in a single stirring method and low mixing efficiency. Materials are difficult to mix quickly and uniformly within the vessel, leading to prolonged reaction times and hindering production efficiency.

[0004] 2. Lack of effective coordination between the mixing vessel and the circulation system. An unreasonable material circulation path fails to fully utilize the circulation process to enhance mixing, resulting in poor mixing uniformity and stability, which in turn affects the consistency of product quality.

[0005] Against this backdrop, the development of a novel and efficient mixing reactor for the production of N-methylaniline is of significant practical importance. Utility Model Content

[0006] In order to solve the problems mentioned in the background art, the present invention provides a mixing reactor for the production of N-methylaniline.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A mixing vessel for the production of N-methylaniline includes a mixing vessel, the bottom end of which is provided with a discharge port, a circulation pipe is connected between the discharge port and the inlet of a circulation pump, and a feeding port is provided on the inlet.

[0009] The mixing vessel is equipped with two rotating stirring shafts inside. The top of the stirring shafts extends to the outside of the mixing vessel and is equipped with a rotary joint. The circulating pump has two discharge ports, and each discharge port is connected to the two rotary joints by a feed pipe.

[0010] Preferably, the stirring shaft is hollow inside, and multiple stirring branches are provided on the outside of the stirring shaft. The stirring branches are connected to the inside of the stirring shaft, and a nozzle is provided at one end of the stirring shaft.

[0011] Preferably, the plurality of stirring branches are evenly distributed in a ring around the outer edge of the stirring shaft.

[0012] Preferably, a gear is fixed to the outside of the stirring shaft near the top, and the two gears mesh with each other.

[0013] Preferably, a driven pulley is fixed to the outside of one of the stirring shafts, a rotary motor is fixed to the top of the mixing vessel, a drive pulley is fixed to the output shaft of the rotary motor, and a transmission belt is provided between the driven pulley and the drive pulley.

[0014] Preferably, the stirring branches are arranged in a ring array outside the stirring shaft, a crossbar is fixed inside the mixing vessel, a plug is fixed at the top of the crossbar, the plug extends into the stirring branches, and the plug has an arc-shaped structure, with a notch on the side of the plugs that are close to each other.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. By setting a discharge port at the bottom of the mixing vessel and connecting it to the inlet of the circulating pump via a circulation pipe, and simultaneously setting a feeding port at the inlet, the material is circulated and sprayed for mixing. After being pressurized by the circulating pump, the material is sprayed into the mixing vessel through the feeding pipe, stirring shaft, stirring branch, and nozzle. The material after the initial mixing can then re-enter the circulating pump through the discharge port and circulation pipe for further circulation and spraying, greatly accelerating the material mixing process and significantly improving mixing efficiency.

[0017] 2. The intermeshing gears fixed near the top of the stirring shaft, and the structure connecting one of the stirring shafts to the driving pulley of the rotary motor via a driven pulley and a transmission belt, allow the two stirring shafts to rotate synchronously in opposite directions when the rotary motor is turned on. Simultaneously, the stirring shaft is hollow inside and has multiple evenly distributed annular stirring branches on its exterior. These branches are connected to the interior of the stirring shaft and have nozzles at one end. During the rotation of the stirring shaft, the stirring branches agitate the material, working in conjunction with the circulating jet mixing to further enhance the mixing effect.

[0018] 3. The stirring branches are arranged in a ring array outside the stirring shaft, and a plug is installed at the top of the fixed crossbar inside the mixing vessel. Due to the special arc-shaped structure of the plug and the design of the notches close to each other, when the stirring shaft rotates, the stirring branches can only align with the notches when they rotate to a position where the two stirring shafts are directly opposite each other. At this time, the nozzles on the stirring branch spray liquid, and the liquid sprayed from the opposing nozzles on the two stirring shafts impacts each other, greatly improving the mixing effect. When the nozzles rotate to a position where the two stirring shafts are far apart, they are automatically blocked by the plug. This design ensures that only some of the opposing nozzles spray liquid at any given time, effectively increasing the pressure of the sprayed liquid and further optimizing the mixing effect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is the front view of the present invention;

[0021] Figure 2 This is a cross-sectional view of the present invention;

[0022] Figure 3 This is an exploded view showing the fit between the stirring shaft and the plug of this utility model.

[0023] Figure 4 This is a perspective view of the stirring shaft of this utility model;

[0024] Figure 5 This is a top view of the gear of this utility model;

[0025] Figure 6 This is a front view of the stirring shaft of this utility model;

[0026] In the diagram: 3. Mixing vessel; 301. Discharge port; 302. Circulation pipe; 303. Stirring shaft; 3031. Rotary joint; 304. Stirring branch; 305. Nozzle; 306. Crossbar; 307. Blocker; 8. Circulation pump; 801. Feed inlet; 802. Feed port; 803. Feed pipe; 9. Power input shaft; 901. Gear; 902. Driven pulley; 903. Rotary motor; 904. Driven pulley. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Example 1

[0029] Reference Figure 1-6A mixing vessel for the production of N-methylaniline includes a mixing vessel 3. The bottom end of the mixing vessel 3 is provided with a discharge port 301. A circulation pipe 302 is connected between the discharge port 301 and the inlet 801 of the circulation pump 8. The inlet 801 is provided with a feeding port 802. Two stirring shafts 303 are rotatably installed inside the mixing vessel 3. The top end of the stirring shaft 303 extends to the outside of the mixing vessel 3 and is provided with a rotary joint 3031. The circulation pump 8 is provided with two discharge ports, and a feeding pipe 803 is provided between each of the two discharge ports and the two rotary joints 3031. The stirring shaft 303 is hollow inside, and multiple stirring branches 304 are provided on the outside of the stirring shaft 303. The stirring branches 304 are connected to the inside of the stirring shaft 303, and a nozzle 305 is provided at one end of the stirring shaft 303.

[0030] The material enters the circulating pump 8 through the feed port 802 and the inlet 801. After being pressurized, it is sprayed into the interior of the mixing vessel 3 through the feed pipe 803, the stirring shaft 303, and the nozzle 305, thereby accelerating the mixing of the material. The material mixed initially can flow out through the outlet 301 and flow back into the circulating pump 8 through the circulating pipe 302 for spray mixing. At the same time, the stirring shaft 303 can rotate, driving the stirring branch 304 to stir the material, further improving the mixing efficiency.

[0031] Multiple stirring branches 304 are evenly distributed in a ring around the outside of the stirring shaft 303. A gear 901 is fixed near the top of the stirring shaft 303. Two gears 901 mesh with each other. A driven pulley 902 is fixed to the outside of one of the stirring shafts 303. A rotary motor 903 is fixed to the top of the mixing vessel 3. A drive pulley 904 is fixed to the output shaft of the rotary motor 903. A transmission belt is provided between the driven pulley 902 and the drive pulley 904.

[0032] When the rotary motor 903 is turned on, it can drive the drive pulley 904 to rotate, which in turn drives the driven pulley 902 to rotate through the transmission belt, thereby driving one of the stirring shafts 303 to rotate. Then, through the meshing of the two gears 901, the other stirring shaft 303 can be driven to rotate synchronously in the opposite direction, thus achieving the effect of stirring and mixing.

[0033] Among them, the stirring branches 304 are arranged in a ring array on the outside of the stirring shaft 303. A crossbar 306 is fixed inside the mixing vessel 3. A plug 307 is fixed at the top of the crossbar 306. The plug 307 extends into the stirring branches 304. The plug 307 has an arc-shaped structure and a notch is provided on the side of the plugs 307 that are close to each other.

[0034] Since the plug 307 is fixed, during the rotation of the stirring shaft 303, the stirring branch 304 can only be aligned with the notch when it rotates to the direction where the two stirring shafts 303 are directly opposite each other. At this time, the stirring branch 304 is in a connected state, and the nozzle 305 connected to the stirring branch 304 can spray liquid. At this time, the nozzles 305 on the two stirring shafts 303 are directly opposite each other, and the two liquids impact each other, thereby improving the mixing effect. When the nozzle 305 rotates to the side where the two stirring shafts 303 are far apart, it will be automatically blocked by the plug 307. For a certain period of time, only some of the opposite nozzles 305 will spray liquid, which can increase the pressure of the sprayed liquid and further improve the mixing effect.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mixing vessel for the production of N-methylaniline, comprising a mixing vessel (3), characterized in that: The bottom end of the mixing vessel (3) is provided with a discharge port (301), and a circulation pipe (302) is connected between the discharge port (301) and the inlet (801) of the circulation pump (8). The inlet (801) is provided with a feeding port (802). The mixing vessel (3) is equipped with two stirring shafts (303) inside. The top of the stirring shafts (303) extends to the outside of the mixing vessel (3) and is equipped with a rotary joint (3031). The circulating pump (8) is provided with two discharge ports, and a feed pipe (803) is provided between the two discharge ports and the two rotary joints (3031).

2. The mixing vessel for producing N-methylaniline according to claim 1, characterized in that: The stirring shaft (303) is hollow inside, and multiple stirring branches (304) are provided on the outside of the stirring shaft (303). The stirring branches (304) are connected to the inside of the stirring shaft (303), and a nozzle (305) is provided at one end of the stirring shaft (303).

3. The mixing reactor for N-methylaniline production according to claim 2, characterized in that: The multiple stirring branches (304) are evenly distributed in an outer ring around the stirring shaft (303).

4. The mixing vessel for producing N-methylaniline according to claim 1, characterized in that: A gear (901) is fixed to the outside of the stirring shaft (303) near the top, and the two gears (901) mesh with each other.

5. The mixing vessel for producing N-methylaniline according to claim 1, characterized in that: One of the stirring shafts (303) is externally fixed with a driven pulley (902), and a rotary motor (903) is fixed at the top of the mixing vessel (3). The output shaft of the rotary motor (903) is fixed with a driving pulley (904), and a transmission belt is provided between the driven pulley (902) and the driving pulley (904).

6. The mixing vessel for producing N-methylaniline according to claim 2, characterized in that: The stirring branches (304) are arranged in a ring array on the outside of the stirring shaft (303). A crossbar (306) is fixed inside the mixing vessel (3). A plug (307) is fixed at the top of the crossbar (306). The plug (307) extends into the stirring branches (304). The plug (307) has an arc-shaped structure and a notch is provided on the side of the plugs (307) that are close to each other.

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