Mixing and stirring equipment for producing dipropylene glycol methyl ether acetate

Abstract

The utility model relates to the technical field of mixing and stirring equipment, and discloses mixing and stirring equipment for producing dipropylene glycol methyl ether acetate, which comprises a reaction kettle, a rotating motor is mounted at the top of the reaction kettle, and a rotating rod is in key connection with an output shaft end of the rotating motor; by means of the feeding groove, most of the additive guided into the hollow pipe from the guide pipe flows into the conveying cavity through the guide cylinder, the additive in the conveying cavity is conveniently thrown into the conveying pipe and flows into the discharging groove in the scraper blade in cooperation with the rotating rod which rotates, and when the additive is solid, the scraper blade is driven by the conveying pipe to rotate; when part of the solid is in contact with the material receiving plate, the solid can be directly guided into the middle or the bottom of the liquid level along with fluctuation of the liquid, so that the solid is matched with continuous rotation of the stirring rod to be directly and fully mixed with the whole liquid in the reaction kettle, and a solid additive is prevented from being adhered to the inner wall of the reaction kettle in cooperation with the rotating scraping plate; the mixing effect is influenced.

Description

Technical Field

[0001] This utility model relates to the field of mixing and stirring equipment, and more specifically to mixing and stirring equipment for the production of dipropylene glycol methyl ether acetate. Background Technology

[0002] Dipropylene glycol methyl ether acetate is an important organic solvent widely used in coatings, inks, electronic chemicals, and other fields. The production of dipropylene glycol methyl ether acetate usually involves esterification, with dipropylene glycol methyl ether and acetic acid as the main raw materials. The production process includes solid acid catalytic esterification. In the production process of dipropylene glycol methyl ether acetate, mixing and stirring equipment is one of the key links. It is mainly used to uniformly mix the reaction raw materials (such as dipropylene glycol methyl ether, acetic acid, etc.) and catalysts to ensure the efficient progress of the reaction.

[0003] However, in existing mixing and stirring equipment for the production of dipropylene glycol methyl ether acetate, when solid additives are added to the reactor, the solid additives are added all at once and fall directly onto the surface of the liquid level in the reactor, causing the solid additives to accumulate. Due to the lack of a mechanism to directly disperse the solid additives to the top, middle and bottom of the liquid level, the accumulated solid additives are prone to sticking when stirred, thus affecting the mixing effect between the additives and the liquid. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a mixing and stirring device for the production of dipropylene glycol methyl ether acetate, so as to solve the problem in the background art that, due to the lack of a mechanism to directly disperse solid additives to the top, middle and bottom of the liquid level, the accumulated fixed additives are prone to sticking when stirred, thereby affecting the mixing effect of the additives and the liquid.

[0005] This utility model provides the following technical solution: a mixing and stirring device for the production of dipropylene glycol methyl ether acetate, including a reaction vessel, a rotary motor installed on the top of the reaction vessel, a rotating rod keyed to the output shaft of the rotary motor, a feeding cylinder fixedly connected to the top of the reaction vessel near the rotary motor, and also including a guiding mechanism, a conveying mechanism, a diffusion scraping mechanism and a stirring component. The stirring component is located at the bottom of the rotating rod and is used to stir the liquid. The guiding mechanism is located at the bottom of the feeding cylinder, and one end of the guiding mechanism passes through the top of the reaction vessel and extends into the vessel. The bottom of the guiding mechanism is sleeved on the outside of the rotating rod, and the guiding mechanism and the rotating rod are spaced apart. The conveying mechanism is located inside the rotating rod, and the interior of the conveying mechanism is connected to the interior of the guiding mechanism. The diffusion scraping mechanism is located near the inner wall of the reaction vessel, and the diffusion scraping mechanism and the conveying mechanism are fixedly connected, and the interior of the diffusion scraping mechanism is connected to the interior of the conveying mechanism.

[0006] Furthermore, the material guiding mechanism includes a guide tube and a hollow tube. The top end of the guide tube is fixedly connected to the bottom end of the feeding cylinder, and the outer wall of the guide tube penetrates the top of the reactor and extends into the reactor. One end of the guide tube is fixedly connected to a hollow tube, and the hollow tube is sleeved on the outside of the rotating rod.

[0007] Furthermore, a solenoid valve is installed on the outer wall of the guide tube near the bottom of the feeding cylinder.

[0008] Furthermore, the conveying mechanism includes a feeding trough, a guide cylinder, a conveying pipe, and a conveying cavity. There are two feeding troughs, which are opened at the top of the outer wall of the rotating rod and are symmetrically arranged. The bottom of each of the two feeding troughs is fixedly connected to a guide cylinder. The rotating rod has a conveying cavity that connects the two feeding troughs. The bottom of the rotating rod is fixedly connected to two conveying pipes, which are symmetrically arranged and communicate with the inside of the conveying cavity.

[0009] Furthermore, the diffusion scraping mechanism includes a scraper, a discharge trough, a discharge hole, and a receiving plate. Two scrapers are provided, and the tops of the two scrapers are fixedly connected to the conveying mechanism. The two scrapers are arranged in a rotationally symmetrical manner along the inner wall of the reactor. A discharge trough is opened on one side of the scraper, and two discharge holes are opened on the inner side of the scraper. Both discharge holes communicate with the discharge trough. A receiving plate is fixedly connected to the inner wall of the discharge trough near the two discharge holes.

[0010] Furthermore, the stirring component includes a support rod and a stirring rod. The top end of the support rod is fixedly connected to the bottom end of the rotating rod, and several sets of stirring rods are fixedly connected to the outer wall of the support rod. Each set of stirring rods is equidistant from the radial direction of the support rod.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. This utility model uses a solenoid valve to precisely control the amount of additive discharged from the feeding cylinder. Through the feeding trough, most of the additive introduced from the guide tube into the hollow tube flows into the conveying chamber, while a small portion is directly introduced into the reactor from the hollow tube, allowing the additive to contact the top of the liquid. The rotating rod facilitates the throwing of the additive from the conveying chamber into the conveying pipe and into the discharge trough inside the scraper. When the additive is solid, the conveying pipe drives the scraper to rotate, causing the solid to move downwards along the discharge trough. When some of the solid contacts the receiving plate, it is directly introduced into the middle or bottom of the liquid level due to the liquid's fluctuations. Combined with the continuous rotation of the stirring rod, this ensures thorough mixing with the liquid in the reactor. The rotating scraper also prevents solid additives from sticking to the inner wall of the reactor, thus maintaining the mixing effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a front view of the reaction vessel of this utility model;

[0015] Figure 3 This is a cross-sectional view of the reaction vessel of this utility model;

[0016] Figure 4 This is a schematic diagram of the stirring rod structure of this utility model;

[0017] Figure 5 This is a cross-sectional view of the hollow tube structure of this utility model;

[0018] Figure 6 This is a partial cross-sectional view of the scraper of this utility model.

[0019] The attached figures are labeled as follows: 1. Reactor; 2. Feeding cylinder; 3. Guide tube; 4. Rotary motor; 5. Rotating rod; 6. Hollow tube; 7. Feed trough; 8. Guide cylinder; 9. Conveying pipe; 10. Scraper; 11. Discharge trough; 12. Discharge hole; 13. Receiving plate; 14. Support rod; 15. Stirring rod; 16. Conveying chamber; 17. Solenoid valve. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0021] Appendix Figures 1-6 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-6 The present invention will be further described below.

[0022] See attached document Figures 1-6 The mixing and stirring equipment for the production of dipropylene glycol methyl ether acetate includes a reactor 1, a rotary motor 4 installed on the top of the reactor 1, a rotating rod 5 keyed to the output shaft of the rotary motor 4, a feeding cylinder 2 fixedly connected to the top of the reactor 1 near the rotary motor 4, and also includes a guiding mechanism, a conveying mechanism, a diffusion scraping mechanism and a stirring component. The stirring component is located at the bottom of the rotating rod 5 and is used to stir the liquid. The guiding mechanism is located at the bottom of the feeding cylinder 2, and one end of the guiding mechanism passes through the top of the reactor 1 and extends into the reactor. The bottom of the guiding mechanism is sleeved on the outside of the rotating rod 5, and the guiding mechanism and the rotating rod 5 are spaced apart. The conveying mechanism is located inside the rotating rod 5, and the interior of the conveying mechanism is connected to the interior of the guiding mechanism. The diffusion scraping mechanism is located near the inner wall of the reactor 1, and the diffusion scraping mechanism and the conveying mechanism are fixedly connected. The interior of the diffusion scraping mechanism is connected to the interior of the conveying mechanism.

[0023] In this embodiment, the additive is introduced into the conveying mechanism through the guiding mechanism. With the help of the rotating rod 5, the conveying mechanism can easily throw the additive into the diffusion scraping mechanism. When the additive is solid, the diffusion scraping mechanism can easily introduce the solid additive directly into the middle and bottom of the liquid inside the reactor 1. With the help of the stirring component, the solid additive can be directly and fully mixed with the liquid in the reactor 1. Again, with the help of the diffusion scraping mechanism, the solid additive adhering to the inner wall of the reactor 1 can be easily scraped off during rotation to avoid affecting the mixing effect.

[0024] Specifically, the material guiding mechanism includes a guide tube 3 and a hollow tube 6. The top end of the guide tube 3 is fixedly connected to the bottom end of the feeding cylinder 2, and the outer wall of the guide tube 3 penetrates the top end of the reactor 1 and extends into the reactor 1. One end of the guide tube 3 is fixedly connected to the hollow tube 6, and the hollow tube 6 is sleeved on the outside of the rotating rod 5.

[0025] In this embodiment, a gap is provided between the inner wall of the hollow tube 6 and the outer wall of the rotating rod 5, so as not to affect the rotation of the rotating rod 5 while facilitating the introduction of additives into the rotating rod 5.

[0026] Specifically, a solenoid valve 17 is installed on the outer wall of the guide tube 3 near the bottom of the feeding cylinder 2.

[0027] In this embodiment, the amount of additive dispensed from the feeding cylinder 2 can be precisely controlled by the solenoid valve 17.

[0028] Specifically, the conveying mechanism includes a feed trough 7, a guide cylinder 8, a conveying pipe 9, and a conveying cavity 16. There are two feed troughs 7, which are located on the top of the outer wall of the rotating rod 5 and are symmetrically arranged. The bottom of each feed trough 7 is fixedly connected to a guide cylinder 8. The rotating rod 5 has a conveying cavity 16 that connects the two feed troughs 7. The bottom of the rotating rod 5 is fixedly connected to two conveying pipes 9, which are symmetrically arranged and communicate with the inside of the conveying cavity 16.

[0029] In this embodiment, the rotating rod 5 facilitates the throwing of additives inside the conveying chamber 16 into the conveying pipe 9 and into the diffusion scraping mechanism.

[0030] Specifically, the diffusion scraping mechanism includes a scraper 10, a discharge trough 11, a discharge hole 12, and a receiving plate 13. There are two scrapers 10, and the tops of the two scrapers 10 are fixedly connected to the conveying mechanism. The two scrapers 10 are arranged in a rotationally symmetrical manner along the inner wall of the reactor 1. A discharge trough 11 is opened on one side of the scraper 10, and two discharge holes 12 are opened on the inner side of the scraper 10. Both discharge holes 12 are connected to the discharge trough 11. A receiving plate 13 is fixedly connected to the inner wall of the discharge trough 11 near the two discharge holes 12.

[0031] In this embodiment, when the additive is solid, the conveying pipe 9 drives the scraper 10 to rotate, causing the solid additive to move downward along the discharge trough 11. When some of the solid additive comes into contact with the receiving plate 13, the solid additive will be directly introduced into the middle or bottom of the liquid level from the discharge hole 12 with the fluctuation of the liquid, which facilitates the solid additive to be directly introduced into the middle and bottom of the liquid level to react and mix with the liquid, thereby improving the mixing effect.

[0032] Specifically, the stirring component includes a support rod 14 and a stirring rod 15. The top end of the support rod 14 is fixedly connected to the bottom end of the rotating rod 5. Several sets of stirring rods 15 are fixedly connected to the outer wall of the support rod 14, and each set of stirring rods 15 is arranged equidistantly along the radial direction of the support rod 14.

[0033] In this embodiment, the rotation of several stirring rods 15 facilitates the stirring of the solid additive discharged from the discharge hole 12, so as to fully mix it with the liquid.

[0034] The working principle and usage process of this utility model are as follows: During use, the rotary motor 4 is started, causing the rotating rod 5 to rotate. The rotating rod 5 then rotates the support rod 14, which in turn drives multiple sets of stirring rods 15 to stir and mix the liquid. When adding additives, the amount of additive discharged from the feeding cylinder 2 can be precisely controlled by the solenoid valve 17. The additive flows from the feeding cylinder 2 into the guide tube 3 and then from inside the guide tube 3 into the hollow tube 6. At this time, most of the additive introduced into the hollow tube 6 flows into the conveying chamber 16 through the feed trough 7 and the guide tube 8, while a small portion of the additive is directly introduced into the reaction vessel 1 from the hollow tube 6. Contacting the top of the liquid, the rotating rod 5 facilitates the throwing of additives from the conveying chamber 16 into the conveying pipe 9 and into the discharge trough 11 inside the scraper 10. When the additive is solid, the conveying pipe 9 drives the scraper 10 to rotate, causing the solid additive to move downwards along the discharge trough 11. When some of the solid additive comes into contact with the receiving plate 13, the solid additive will be directly introduced from the discharge hole 12 into the middle or bottom of the liquid level due to the fluctuation of the liquid. In this way, in conjunction with the continuous rotation of the stirring rod 15, it can be fully mixed with the liquid in the reactor 1. At the same time, the scraper 10 rotates on the inner wall of the reactor 1 to prevent the solid additive from sticking to the inner wall of the reactor 1 and affecting the mixing effect.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A mixing and stirring device for the production of dipropylene glycol methyl ether acetate, comprising a reaction vessel (1), wherein a rotary motor (4) is mounted on the top of the reaction vessel (1), a rotating rod (5) is keyed to the output shaft end of the rotary motor (4), and a feeding measuring cylinder (2) is fixedly connected to the top of the reaction vessel (1) near the rotary motor (4), characterized in that: It also includes a material guiding mechanism, a conveying mechanism, a diffusion scraping mechanism and a stirring component. The stirring component is located at the bottom of the rotating rod (5) and is used to stir the liquid. The material guiding mechanism is located at the bottom of the feeding cylinder (2), and one end of the material guiding mechanism passes through the top of the reactor (1) and extends into the reactor. The bottom of the material guiding mechanism is sleeved on the outside of the rotating rod (5), and the material guiding mechanism and the rotating rod (5) are spaced apart. The conveying mechanism is located inside the rotating rod (5), and the inside of the conveying mechanism is connected to the inside of the material guiding mechanism. The diffusion scraping mechanism is located near the inner wall of the reactor (1), and the diffusion scraping mechanism and the conveying mechanism are fixedly connected. The inside of the diffusion scraping mechanism is connected to the inside of the conveying mechanism.

2. The mixing and agitating apparatus for production of dipropylene glycol methyl ether acetate as claimed in claim 1 wherein: The material guiding mechanism includes a guide tube (3) and a hollow tube (6). The top end of the guide tube (3) is fixedly connected to the bottom end of the feeding cylinder (2), and the outer wall of the guide tube (3) penetrates the top end of the reactor (1) and extends into the reactor (1). One end of the guide tube (3) is fixedly connected to the hollow tube (6), and the hollow tube (6) is sleeved on the outside of the rotating rod (5).

3. The mixing and agitating apparatus for production of dipropylene glycol methyl ether acetate as claimed in claim 2 wherein: A solenoid valve (17) is installed on the outer wall of the guide tube (3) near the bottom of the feeding cylinder (2).

4. The mixing and agitating apparatus for production of dipropylene glycol methyl ether acetate as claimed in claim 1 wherein: The conveying mechanism includes a feeding trough (7), a guide cylinder (8), a conveying pipe (9), and a conveying cavity (16). There are two feeding troughs (7), which are located on the top of the outer wall of the rotating rod (5). The two feeding troughs (7) are symmetrically arranged. The bottom of each of the two feeding troughs (7) is fixedly connected to a guide cylinder (8). The rotating rod (5) has a conveying cavity (16) that connects the two feeding troughs (7). The bottom of the rotating rod (5) is fixedly connected to two conveying pipes (9), which are symmetrically arranged and communicate with the inside of the conveying cavity (16).

5. The mixing and agitating apparatus for production of dipropylene glycol methyl ether acetate as claimed in claim 1 wherein: The diffusion scraping mechanism includes a scraper (10), a discharge trough (11), a discharge hole (12), and a receiving plate (13). There are two scrapers (10), and the tops of the two scrapers (10) are fixedly connected to the conveying mechanism. The two scrapers (10) are arranged in a rotationally symmetrical manner along the inner wall of the reactor (1). A discharge trough (11) is opened on one side of the scraper (10), and two discharge holes (12) are opened on the inner side of the scraper (10). Both discharge holes (12) are connected to the discharge trough (11). A receiving plate (13) is fixedly connected to the inner wall of the discharge trough (11) near the two discharge holes (12).

6. The mixing and stirring equipment for the production of dipropylene glycol methyl ether acetate according to claim 1, characterized in that: The stirring component includes a support rod (14) and a stirring rod (15). The top end of the support rod (14) is fixedly connected to the bottom end of the rotating rod (5). Several sets of stirring rods (15) are fixedly connected to the outer wall of the support rod (14). Each set of stirring rods (15) is arranged equidistantly along the radial direction of the support rod (14).

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