Feeding device of esterification reaction kettle

Abstract

The utility model relates to a feeding device of an esterification reaction kettle, which belongs to the technical field of feeding equipment and comprises an esterification kettle, a raw material adding pipe, a premixing box, a stirring shaft, a stirring impeller, a distribution conical disc, a raw material storage tank, a spiral conveyor, a liquid raw material storage tank, a conveying pipe, a liquid pump, a catalyst adding pipe and a catalyst storage tank. The catalyst adding pipe and the conveying pipe are each provided with a flow adjusting valve and a flow meter. Solid powder raw materials are conveyed through the spiral conveyor, liquid materials are conveyed through the liquid pump, metering is carried out through the flow meter, raw material conveying is more accurate, and quantitative solid and liquid materials are conveyed to the distribution conical disc in the premixing box and are distributed and mixed through rotation of the distribution conical disc. Then the materials are stirred and mixed again through the stirring impeller at the lower part of the premixing box and then are added into the esterification kettle through the raw material adding pipe, so that the materials are uniformly mixed before entering the esterification kettle, and the reaction efficiency is favorably improved.

Description

A feeding device for an esterification reactor Technical Field

[0001] This utility model belongs to the field of feeding equipment technology, specifically relating to a feeding device for an esterification reactor. Background Technology

[0002] The esterification reaction of methyl anthranilate requires the input of both solid powder and liquid materials, along with a catalyst. Currently, traditional feeding devices have several problems. For solid powder raw materials, the entire batch is fed in and then mixed by stirring, resulting in inadequate material mixing, low reaction efficiency, and unstable product quality. Summary of the Invention

[0003] Therefore, it is necessary to provide a feeding device for an esterification reactor to address the problems of the existing technology.

[0004] To solve the problems of the existing technology, the technical solution adopted by this utility model is as follows:

[0005] A feeding device for an esterification reactor includes an esterification reactor. A raw material adding pipe is located at the top of the esterification reactor. A premixing tank is fixed to the top of the raw material adding pipe. A stirring shaft is rotatably installed inside the premixing tank. A stirring impeller is fixed to the bottom of the stirring shaft. A distribution cone is fixed to the upper part of the stirring shaft. A solid raw material storage tank is located above the premixing tank. A screw conveyor is fixed to the bottom of the solid raw material storage tank. The outlet of the screw conveyor extends into the premixing tank and faces the top center of the distribution cone. A liquid raw material storage tank is located on one side of the esterification reactor. A conveying pipe is fixed to the bottom of the liquid raw material storage tank. The other end of the conveying pipe extends into the premixing tank and faces the top center of the distribution cone. A liquid pump is installed on the conveying pipe. A catalyst adding pipe is located at the top of the esterification reactor and is connected to the catalyst storage tank. Flow regulating valves and flow meters are installed on both the catalyst adding pipe and the conveying pipe.

[0006] As a preferred embodiment, a distribution ring tube is fixed on the upper inner wall of the esterification reactor. The bottom of the distribution ring tube is uniformly provided with distribution liquid holes. The bottoms of the catalyst addition tube and the raw material addition tube are both fixed to the distribution ring tube, which can better and more evenly distribute the raw materials and catalyst entering the esterification reactor and improve the reaction efficiency.

[0007] As a preferred embodiment, the esterification reactor is equipped with a rotating shaft, with a stirrer fixed at the lower end of the rotating shaft and a stirring motor fixed at the top of the rotating shaft. A pulley is fixed at the upper part of the rotating shaft, and a pulley is connected to a second pulley via a belt. The second pulley is fixed on the stirring shaft, and the stirring shaft can be driven by the rotating shaft, eliminating the need for a separate power equipment and saving costs.

[0008] As a preferred embodiment, the catalyst storage tank is fitted with two semi-circular fixing plates on the outside. The two ends of the fixing plates are fixed with connecting flanges, and fastening bolts are provided on the connecting flanges. The inner fixing plates are fixed with support plates, and the inner end of the support plates is fixed to the frame of the stirring motor by bolts. The fixing and installation of the catalyst storage tank is relatively convenient and quick.

[0009] As a preferred option, the inner wall of the fixing clamp is fixed with an anti-slip rubber layer, which better prevents the fixing clamp from sliding with the catalyst storage tank and can reduce the impact of the vibration of the stirring motor on the catalyst storage tank.

[0010] As a preferred embodiment, the distribution cone is uniformly provided with multiple distribution holes to facilitate the distribution of liquids and powdered solids.

[0011] As a preferred embodiment, the upper end of the stirring shaft extends to the side of the solid raw material storage tank, and a pulley three is fixed to the upper end of the stirring shaft. The pulley three is connected to a pulley four via a belt two. An agitator shaft is rotatably installed inside the solid raw material storage tank, and an agitator rod is fixed on the agitator shaft. The arrangement of the agitator shaft and agitator rod can prevent bridging of the powder raw materials in the solid raw material storage tank, and the agitator shaft can be driven by a rotating shaft, eliminating the need for a separate power equipment and saving costs.

[0012] The advantages of this utility model compared with the prior art are:

[0013] Solid powder raw materials are conveyed by a screw conveyor, and liquid materials are conveyed by a liquid pump. The flow meter measures the flow rate, making the material delivery more precise. A fixed amount of solid and liquid materials are conveyed to the distribution cone in the premixing tank. After being mixed by the rotation of the distribution cone, the materials are stirred again by the impeller at the bottom of the premixing tank and then added to the esterification reactor through the raw material addition pipe. This ensures that the materials are uniformly mixed before entering the esterification reactor, which helps to improve the reaction efficiency. Attached Figure Description

[0014] Figure 1 is a structural schematic diagram of this utility model;

[0015] Figure 2 is a partial structural schematic diagram of Figure 1;

[0016] Figure 3 is a schematic diagram of the internal structure of the solid raw material storage tank;

[0017] The numbers on the map are:

[0018] 1. Esterification reactor; 2. Catalyst addition pipe; 3. Fixing clamp; 4. Catalyst storage tank; 5. Stirring motor; 6. Rotary shaft; 7. Flow meter; 8. Premixing tank; 9. Stirring shaft; 10. Solid raw material storage tank; 11. Screw conveyor; 12. Distribution cone; 13. Liquid raw material storage tank; 14. Stirring impeller; 15. Raw material addition pipe; 16. Conveying pipe; 17. Liquid pump; 18. Pulley 2; 19. Pulley 3; 20. Stirring shaft; 21. Stirring rod; 22. Distribution ring pipe. Detailed Implementation

[0019] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0020] Example 1, referring to Figures 1 to 3, a feeding device for an esterification reactor includes an esterification reactor 1. A raw material adding pipe 15 is provided at the top of the esterification reactor 1. A premixing tank 8 is fixed to the top of the raw material adding pipe 15. A stirring shaft 9 is rotatably installed inside the premixing tank 8. A stirring impeller 14 is fixed to the bottom of the stirring shaft 9. A distribution cone 12 is fixed to the upper part of the stirring shaft 9. A solid raw material storage tank 10 is provided above the premixing tank 8. A screw conveyor 11 is fixed to the bottom of the solid raw material storage tank 10. The outlet of the screw conveyor 11 extends into... Inside the premixing tank 8, with the outlet facing the top center of the distribution cone 12, a liquid raw material storage tank 13 is provided on one side of the esterification reactor 1. A conveying pipe 16 is fixed at the bottom of the liquid raw material storage tank 13. The other end of the conveying pipe 16 extends into the premixing tank 8, with the outlet facing the top center of the distribution cone 12. A liquid pump 17 is provided on the conveying pipe 16. A catalyst addition pipe 2 is provided at the top of the esterification reactor 1. The catalyst addition pipe 2 is connected to the catalyst storage tank 4. Both the catalyst addition pipe 2 and the conveying pipe 16 are equipped with flow regulating valves and flow meters 7.

[0021] During operation, solid raw materials are transported from solid raw material storage tank 10 to premixing tank 8 via screw conveyor 11, and liquid raw materials are transported from liquid raw material storage tank 13 to premixing tank 8 via liquid pump 17, flow regulating valve and flow meter 7. In premixing tank 8, liquid and solid raw materials fall to the top of distribution cone 12, are distributed by the rotation of distribution cone 12, and undergo preliminary mixing. The materials fall to the bottom of premixing tank 8, are stirred by impeller 14, and then added to esterification reactor 1 through raw material addition pipe 15. In esterification reactor 1, they are mixed with catalyst entering through catalyst addition pipe 2 to carry out esterification reaction.

[0022] In Example 2, based on Example 1, a distribution ring pipe 22 is fixed on the upper inner wall of the esterification reactor 1. Distribution ring pipe 22 has uniformly distributed liquid distribution holes at its bottom. The bottoms of the catalyst addition pipe 2 and the raw material addition pipe 15 are both fixed to the distribution ring pipe 22. The flow rate of the valve on the raw material addition pipe 15 is controlled to balance the amount of material discharged from the raw material addition pipe 15 with the amount of material entering. The raw material addition pipe 15 is opened only when the liquid level in the premixing tank 8 is close to the bottom of the distribution cone 12. Automatic control can also be used. A liquid level sensor is installed in the premixing tank 8, and the liquid level sensor is connected to a PLC controller. The valve on the raw material addition pipe 15 is controlled as an electric valve. The PLC controller is connected to the valve on the raw material addition pipe 15, the flow regulating valve, the flow meter 7, and the screw conveyor 11.

[0023] The esterification reactor 1 is equipped with a rotating shaft 6. A stirrer is fixed to the lower end of the rotating shaft 6, and a stirring motor 5 is fixed to the top of the rotating shaft 6. A pulley 1 is fixed to the upper part of the rotating shaft 6. The pulley 1 is connected to a pulley 2 18 via a belt 1. The pulley 2 18 is fixed to the stirring shaft 9. When the stirring motor 5 rotates, it drives the rotating shaft 6 to rotate. Then, through the pulley 1, belt 1, and pulley 2 18, it drives the stirring shaft 9 to rotate, thereby driving the distribution cone 12 to rotate and distribute the material.

[0024] The catalyst storage tank 4 is fitted with two semi-circular fixing plates 3 on the outside. The two ends of the fixing plates 3 are fixed with connecting flanges, and fastening bolts are provided on the connecting flanges. The inner fixing plates 3 are fixed with support plates, and the inner end of the support plates is fixed to the frame of the stirring motor 5 by bolts.

[0025] An anti-slip rubber layer is fixed on the inner wall of the fixing plate 3.

[0026] Multiple distribution holes are evenly provided on the distribution cone disk 12.

[0027] The upper end of the stirring shaft 9 extends to the side of the solid raw material storage tank 10, and a pulley 3 19 is fixed to the upper end of the stirring shaft 9. The pulley 3 19 is connected to a pulley 4 via a belt 2. An agitator shaft 20 is rotatably installed inside the solid raw material storage tank 10, and an agitator rod 21 is fixed on the agitator shaft 20. The rotation of the stirring shaft 9 will drive the agitator shaft 20 to rotate through the pulley 3 19, belt 2, and pulley 4, thereby driving the agitator rod 21 to agitate the solid raw material in the solid raw material storage tank 10 and prevent bridging.

[0028] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A feeding device for an esterification reactor, comprising an esterification reactor (1), wherein a raw material adding pipe (15) is provided at the top of the esterification reactor (1), characterized in that: A premixing tank (8) is fixed to the top of the raw material addition pipe (15). A stirring shaft (9) is rotatably installed inside the premixing tank (8). A stirring impeller (14) is fixed to the bottom of the stirring shaft (9). A distribution cone (12) is fixed to the upper part of the stirring shaft (9). A solid raw material storage tank (10) is provided above the premixing tank (8). A screw conveyor (11) is fixed to the bottom of the solid raw material storage tank (10). The outlet of the screw conveyor (11) extends into the premixing tank (8) and faces the middle top of the distribution cone (12). The esterification kettle ( 1) A liquid raw material storage tank (13) is provided on one side. A conveying pipe (16) is fixed at the bottom of the liquid raw material storage tank (13). The other end of the conveying pipe (16) extends into the premixing tank (8) and the outlet faces the middle top of the distribution cone (12). A liquid pump (17) is provided on the conveying pipe (16). A catalyst addition pipe (2) is provided at the top of the esterification kettle (1). The catalyst addition pipe (2) is connected to the catalyst storage tank (4). A flow regulating valve and a flow meter (7) are provided on both the catalyst addition pipe (2) and the conveying pipe (16).

2. The feeding device for an esterification reactor according to claim 1, characterized in that, A distribution ring tube (22) is fixed on the upper inner wall of the esterification vessel (1). The bottom of the distribution ring tube (22) is uniformly provided with distribution liquid holes. The bottoms of the catalyst addition tube (2) and the raw material addition tube (15) are both fixed to the distribution ring tube (22).

3. The feeding device of an esterification reactor according to claim 1 or 2, characterized in that, The esterification vessel (1) is equipped with a rotating shaft (6), a stirrer is fixed at the lower end of the rotating shaft (6), a stirring motor (5) is fixed at the top of the rotating shaft (6), a pulley is fixed at the upper part of the rotating shaft (6), and a pulley is connected to a second pulley (18) through a belt. The second pulley (18) is fixed on the stirring shaft (9).

4. The feeding device for an esterification reactor according to claim 1, characterized in that, The catalyst storage tank (4) has two semi-circular fixing plates (3) on its outer side. The two ends of the fixing plates (3) are fixed with connecting flanges and fastening bolts. The inner fixing plates (3) are fixed with support plates. The inner end of the support plates is fixed to the frame of the stirring motor (5) by bolts.

5. The feeding device of an esterification reactor according to claim 4, wherein An anti-slip rubber layer is fixed on the inner wall of the fixing clamp (3).

6. The feeding device of an esterification reactor according to claim 1, wherein Multiple distribution holes are uniformly provided on the distribution cone disk (12).

7. The feeding device of an esterification reactor according to claim 3, wherein The upper end of the stirring shaft (9) extends to the side of the solid raw material storage tank (10), and the upper end of the stirring shaft (9) is fixed with a pulley three (19). The pulley three (19) is connected to a pulley four through a belt two. The stirring shaft (20) is rotatably installed inside the solid raw material storage tank (10), and the stirring rod (21) is fixed on the stirring shaft (20).

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