Temperature control device for acrylate emulsion polymerization

Abstract

The utility model provides a temperature control device for acrylate emulsion polymerization, which belongs to the technical field of polymerization temperature control and comprises an emulsion polymerization barrel. The barrel cover assembly is arranged above the emulsion polymerization barrel; the heat dissipation assembly is arranged on the barrel cover assembly; the barrel cover assembly comprises an outer cover ring arranged on the top of the emulsion polymerization barrel, and an inner cover ring arranged on the top of the emulsion polymerization barrel, the outer fixing column is arranged at the top of the outer cover ring; the top cover is arranged at the top of the outer fixing column; the central fixing column is arranged at the central position of the bottom of the top cover; the inner cover is rotationally arranged at the bottom of the central fixing column; the heat dissipation assembly is arranged between the outer cover ring and the inner cover; according to the utility model, the heat exchange pipe is linked with the stirring shaft for stirring the acrylate emulsion in the emulsion polymerization barrel, so that the heat exchange pipe and the stirring shaft rotate synchronously, the cooling liquid flowing in the heat exchange pipe can be in contact with the acrylate emulsion close to the middle position in the emulsion polymerization barrel, and the local temperature of the acrylate emulsion is effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of polymerization temperature control technology, specifically relating to a temperature control device for acrylate emulsion polymerization. Background Technology

[0002] Acrylic ester emulsions require polymerization during processing. Temperature is one of the important factors affecting the polymerization reaction. If the temperature is too high, it is difficult to control and may cause violent polymerization, which can be dangerous. Moreover, the polymerization rate increases, the number of latex particles increases, the particle size decreases, the stability of the emulsion decreases, and there is a risk of latex oxidization in the reactor. Therefore, the temperature must be strictly controlled according to the formula requirements when operating the polymerization reaction.

[0003] In practice, acrylic emulsions usually need to be stirred. During the stirring process, the acrylic emulsion is centrifuged and flows in a vortex. Under the centrifugal rotation of the stirring blade, the part of the acrylic emulsion near the stirring blade is difficult to contact the heat dissipation components on the outside, thus failing to dissipate heat evenly and effectively. This can easily lead to insufficient local heat dissipation, which in turn can cause local overheating and explosive polymerization.

[0004] Therefore, a temperature control device for acrylate emulsion polymerization is proposed. Summary of the Invention

[0005] This invention provides a temperature control device for acrylate emulsion polymerization, which aims to solve the problems mentioned above.

[0006] This utility model provides a temperature control device for acrylic emulsion polymerization, including an emulsion polymerization tank; a tank cover assembly disposed above the emulsion polymerization tank; and a heat dissipation assembly on the tank cover assembly. The tank cover assembly includes: an outer cover ring disposed at the top of the emulsion polymerization tank; an outer fixing post disposed at the top of the outer cover ring; a top cover disposed at the top of the outer fixing post; a central fixing post disposed at the center of the bottom of the top cover; an inner cover rotatably disposed at the bottom of the central fixing post; and a heat dissipation assembly disposed between the outer cover ring and the inner cover. The heat dissipation assembly includes: a rotating ring sliding between the outer cover ring and the inner cover; an exchange pipe disposed at the bottom of the rotating ring; a flow guide shroud disposed between the top of the rotating ring and the central fixing post; hot and cold inlet / outlet pipes disposed at the top of the central fixing post; a stirring shaft docking seat disposed on the outer wall of the heat exchange pipe; and a viscosity detection assembly disposed on the outer cover ring.

[0007] Furthermore, the viscosity detection component includes: a rotor viscometer and an electric push rod disposed on the top of the outer cover ring. The rotor viscometer is located on one side of the electric push rod, and a rotor is disposed on the rotor viscometer near the inner side of the emulsion polymerization tank. A baffle is disposed at the output end of the electric push rod, and a guide rod is disposed on the top of the baffle.

[0008] Furthermore, the inner wall of the outer cover ring and the outer wall of the inner cover are provided with annular grooves for the rotating ring to slide.

[0009] By adopting the above technical solution, the stability of the rotating ring is guaranteed.

[0010] Furthermore, the interior of the flow guide and the central fixed column is provided with a liquid flow channel that allows the cold and hot inlet and outlet pipes to communicate with the heat exchange pipe;

[0011] By adopting the above technical solution, the liquid is ensured to flow and circulate, so that the liquid flows in from one end of the heat exchange tube and flows out from the other end of the heat exchange tube.

[0012] Furthermore, an arc groove is provided at the center of one side of the outer wall of the stirring shaft docking seat;

[0013] By adopting the above technical solution, it is easy for the stirring shaft docking seat to fit into the stirring shaft set inside the emulsion polymerization tank, thereby fixing the stirring shaft docking seat, ensuring that the heat exchange tube rotates synchronously with the stirring shaft, and avoiding interference between the stirring shaft and the heat exchange tube.

[0014] Furthermore, the top of the guide rod extends through the outer cover ring;

[0015] By adopting the above technical solution, the guide rod is limited by the outer cover ring, ensuring the vertical lifting and lowering movement of the baffle.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention links the heat exchange tube to the stirring shaft of the acrylic emulsion in the emulsion polymerization tank, ensuring that the heat exchange tube and the stirring shaft rotate synchronously. This guarantees that the coolant flowing in the heat exchange tube can contact the acrylic emulsion near the center of the emulsion polymerization tank, providing all-round heat dissipation for the acrylic emulsion. This effectively reduces the local temperature of the acrylic emulsion and prevents rapid polymerization. The viscosity detection component monitors the viscosity of the acrylic emulsion in real time, providing assistance for temperature control and heat dissipation, and avoiding the problem of limited temperature detection areas.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the bucket lid assembly structure according to an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the mating structure of the outer cover ring and the viscosity detection component in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the heat dissipation component structure according to an embodiment of the present utility model;

[0024] Reference numerals: 1. Emulsion polymerization tank; 2. Tank lid assembly; 21. Outer cover ring; 22. Outer fixing column; 23. Top cover; 24. Central fixing column; 25. Inner cover; 3. Heat dissipation assembly; 31. Rotating ring; 32. Heat exchange tube; 33. Flow guide; 34. Hot and cold inlet / outlet pipes; 35. Stirring shaft docking seat; 4. Viscosity detection assembly; 41. Rotor-type viscometer; 42. Rotor; 43. Electric push rod; 44. Flow baffle; 45. Guide rod. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages 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. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] Reference Figure 1-4 This utility model embodiment proposes a temperature control device for acrylic emulsion polymerization, including an emulsion polymerization tank 1. The top of the emulsion polymerization tank 1 is provided with an outer cover ring 21 of a tank cover assembly 2. Six outer fixing posts 22 are axially and equally spaced on the top of the outer cover ring 21. A top cover 23 is provided on the top of the six outer fixing posts 22. A central fixing post 24 is provided at the bottom center of the top cover 23. An inner cover 25 is rotatably connected to the bottom of the central fixing post 24. An installation hole for installing a stirring motor is opened at the bottom center of the inner cover 25.

[0027] A rotating ring 31 from the heat dissipation assembly 3 is slidably connected between the outer cover ring 21 and the inner cover 25. The inner wall of the outer cover ring 21 and the outer wall of the inner cover 25 are provided with annular grooves for the rotating ring 31 to slide, ensuring the stability of the rotating ring 31's rotation. A heat exchange pipe 32 is provided at the bottom of the rotating ring 31, and a flow guide shroud 33 is provided between the top of the rotating ring 31 and the central fixing post 24. A hot and cold inlet / outlet pipe 34 is provided at the top of the central fixing post 24. The interiors of the flow guide shroud 33 and the central fixing post 24 are provided for the hot and cold inlet / outlet pipe 34 and the heat exchange pipe 32. The interconnected liquid flow channels ensure the flow of liquid, allowing the liquid to flow in from one end of the heat exchange tube 32 and out from the other end. A stirring shaft docking seat 35 is provided on the outer wall of the heat exchange tube 32. An arc groove is provided at the center of one side of the outer wall of the stirring shaft docking seat 35, which facilitates the stirring shaft docking seat 35 to fit against the stirring shaft provided inside the emulsion polymerization tank 1, thereby fixing the stirring shaft docking seat 35 and ensuring that the heat exchange tube 32 rotates synchronously with the stirring shaft, thus avoiding interference between the stirring shaft and the heat exchange tube 32.

[0028] The top of the outer cover ring 21 is equipped with a rotor viscometer 41 and an electric push rod 43. The rotor viscometer 41 is located on one side of the electric push rod 43, and a rotor 42 is provided on the rotor viscometer 41 near the inner side of the emulsion polymerization tank 1. A baffle 44 is provided at the output end of the electric push rod 43. A guide rod 45 is provided at the top of the baffle 44. The top of the guide rod 45 passes through the outer cover ring 21. The outer cover ring 21 is used to limit the guide rod 45 to ensure that the baffle 44 moves vertically up and down.

[0029] The specific implementation method is as follows: When polymerizing the acrylate emulsion, the acrylate emulsion is injected into the emulsion polymerization tank 1, and the stirring shaft docking seat 35 is docked with the stirring shaft used for stirring. At this time, the heat exchange tube 32 and the stirring shaft are linked and can rotate synchronously. The outer cover ring 21 is covered, the heat exchange tube 32 is inserted into the acrylate emulsion, and the temperature of the acrylate emulsion is detected in real time by a temperature sensor placed on the inner side wall of the emulsion polymerization tank 1.

[0030] The viscosity of the acrylic emulsion is detected by the viscosity detection component 4. During the detection, the electric push rod 43 is controlled to drive the baffle 44 to move downward through the output end on one side. The baffle 44 moves to the outside of the rotor 42 to avoid the stirring of the acrylic emulsion affecting the rotation detection of the rotor 42. The rotor viscometer 41 drives the rotor 42 to rotate. The resistance generated by the rotation of the rotor 42 in the acrylic emulsion is used to measure the fluid viscosity.

[0031] When the viscosity is too high, heat dissipation is required to lower the temperature of the acrylic emulsion. Specifically, the injection of cooling liquid into the hot and cold inlet / outlet pipe 34 is controlled. After the cooling liquid enters the heat exchange pipe 32, it contacts the acrylic emulsion through the heat exchange pipe 32, increasing the contact area between the cooling liquid and the acrylic emulsion and improving the heat dissipation effect. The cooling liquid containing heat is discharged from the other end of the hot and cold inlet / outlet pipe 34, thereby cooling the acrylic emulsion and facilitating temperature control of the acrylic emulsion during polymerization.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A temperature control device for acrylate emulsion polymerization, characterized in that: Includes emulsion polymerization tank (1); A bucket lid assembly (2) is disposed above the emulsion polymerization tank (1); The heat dissipation component (3) on the bucket lid assembly (2); The bucket lid assembly (2) includes: An outer cover ring (21) is provided on the top of the emulsion polymerization tank (1); An external fixing post (22) is provided at the top of the outer cover ring (21); A top cover (23) is provided on the top of the external fixing post (22); A central fixing post (24) is provided at the center of the bottom of the top cover (23); Rotate the inner cover (25) at the bottom of the central fixed post (24); A heat dissipation assembly (3) is disposed between the outer cover ring (21) and the inner cover (25); The heat dissipation component (3) includes: A rotating ring (31) that slides between the outer cover ring (21) and the inner cover (25); The heat exchange tube (32) is located at the bottom of the rotating ring (31); and A flow guide (33) is provided between the top of the rotating ring (31) and the central fixed post (24); Hot and cold inlet / outlet pipes (34) are provided at the top of the central fixed column (24); A stirring shaft docking seat (35) is provided on the outer wall of the heat exchange tube (32); Viscosity detection component (4) is provided on the outer cover ring (21).

2. The temperature control device for acrylate emulsion polymerization according to claim 1, characterized in that: The viscosity detection component (4) includes: a rotor viscometer (41) and an electric push rod (43) located on the top of the outer cover ring (21). The rotor viscometer (41) is located on one side of the electric push rod (43), and a rotor (42) is provided on the rotor viscometer (41) near the inner side of the emulsion polymerization tank (1). A baffle (44) is provided at the output end of the electric push rod (43), and a guide rod (45) is provided on the top of the baffle (44).

3. The temperature control device for acrylate emulsion polymerization according to claim 1, characterized in that: The inner wall of the outer cover ring (21) and the outer wall of the inner cover (25) are provided with annular grooves for the rotating ring (31) to slide.

4. The temperature control device for acrylate emulsion polymerization according to claim 1, characterized in that: The interior of the flow guide (33) and the central fixed column (24) is provided with a liquid flow channel that allows the cold and hot inlet and outlet pipes (34) to communicate with the heat exchange pipe (32).

5. The temperature control device for acrylate emulsion polymerization according to claim 1, characterized in that: An arc groove is provided at the center of one side of the outer wall of the stirring shaft docking seat (35).

6. The temperature control device for acrylate emulsion polymerization according to claim 2, characterized in that: The top of the guide rod (45) passes through the outer cover ring (21).

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