Preparation device of polystyrene-based copolymer

Abstract

The utility model relates to the technical field of preparation of an energy storage dielectric medium for a thin film capacitor, in particular to a preparation device of a polystyrene-based copolymer. Comprising a mixing tank, a first feeding port is formed in the top of the mixing tank, the bottom of the mixing tank is connected to the top of a polymerization tank through a first pipeline, a first valve is arranged on the first pipeline, an interlayer is arranged on the outer side of the bottom of the polymerization tank, and oil passing ports are formed in the two sides of the interlayer; a breather pipe and a feeding pipe provided with a feeding valve are further arranged at the top of the polymerization tank, an air inlet valve is arranged on the breather pipe, a second pipeline downwards penetrates through a top cover of the polymerization tank, the bottom of the second pipeline is close to the bottom surface of an inner cavity of the polymerization tank, and the other end of the second pipeline extends into the upper part in the demulsification tank and is connected with a liquid outlet pipe; a second valve is arranged on the second pipeline, a second feeding opening is formed in the top of the demulsification tank, a liquid discharging pipe is arranged at the bottom of the demulsification tank, a third valve is arranged on the liquid discharging pipe, and a filtering box is arranged below the liquid discharging pipe. The device provided by the utility model is higher in efficiency.

Description

Technical Field

[0001] This utility model relates to the field of energy storage dielectric preparation technology for thin film capacitors, and in particular to a preparation apparatus for polystyrene-based copolymers. Background Technology

[0002] The core of a film capacitor is formed by winding a metallized thin film, which is made by depositing an aluminum layer on one side of a base film. The aluminum layer serves as the electrode, and the base film serves as the insulating layer. P(4FSt-MMA) is a polystyrene-based copolymer, polymerized from 4-fluorostyrene (4-FSt) and methyl methacrylate (MMA). It has a high operating temperature and good insulation properties, and is considered a superior material for the base film. Currently, P(4FSt-MMA) is mainly prepared in the laboratory using Schlenk flasks, and there is no dedicated equipment for industrial production. This application provides an apparatus for preparing this polystyrene-based copolymer. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a preparation apparatus for polystyrene-based copolymers, addressing the aforementioned technical deficiencies.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a preparation device for polystyrene-based copolymers, including a mixing tank, a first feeding port provided at the top of the mixing tank, the bottom of the mixing tank being connected to the top of a polymerization tank via a first pipe, a first valve provided on the first pipe, an outer jacket provided on the bottom of the polymerization tank, oil inlets provided on both sides of the jacket, a vent pipe and a feeding pipe with a feeding valve provided at the top of the polymerization tank, an air inlet valve provided on the vent pipe, a second pipe penetrating downward through the top cover of the polymerization tank with its bottom close to the bottom surface of the inner cavity of the polymerization tank, the other end of the second pipe extending into the upper part of the demulsifying tank and connected to a liquid outlet pipe, a second valve provided on the second pipe, a second feeding port provided at the top of the demulsifying tank, a drain pipe provided at the bottom of the demulsifying tank, a third valve provided on the drain pipe, and a filter box provided below the drain pipe.

[0005] To further optimize this technical solution, a cylindrical opening is provided at the top of the filter box, a mesh cone is placed at the upper opening of the cylindrical opening, and a filter layer is provided inside the mesh cone.

[0006] To further optimize this technical solution, a motor is installed on the top of the mixing tank, and a stirring shaft is rotatably connected inside the mixing tank. Multiple blades are installed on the stirring shaft, and the stirring shaft is drivenly connected to the motor.

[0007] To further optimize this technical solution, an exhaust pipe is provided on one side of the vent pipe, the exhaust pipe is located on the side of the inlet valve near the polymerization tank, and an exhaust valve is provided on the exhaust pipe.

[0008] To further optimize this technical solution, the outlet of the liquid outlet pipe faces obliquely downwards, and the projection of the direction of the liquid spraying out from the outlet of the liquid outlet pipe onto the horizontal plane is tangent to the projection of the inner wall of the demulsifying tank onto the horizontal plane.

[0009] To further optimize this technical solution, a support ring is provided at the lower part of the drain pipe, and a protective cover that can slide up and down is provided on the support ring.

[0010] Compared with the prior art, this utility model has the following advantages: 1. It includes a mixing tank, a polymerization tank, a demulsifying tank, a filter box, and corresponding pipelines. When the polymerization reaction is carried out in the polymerization tank, the corresponding raw materials can be put into the mixing tank for pre-emulsification in order to prepare for the next batch of production, thus achieving high efficiency; 2. The outlet of the liquid outlet pipe faces downwards at an angle. The projection of the direction of the liquid sprayed from the outlet of the liquid outlet pipe on the horizontal plane is tangent to the projection of the inner wall of the demulsifying tank on the horizontal plane. This causes the emulsion to spray downwards at an angle onto the saturated brine, causing the mixture of saturated brine and emulsion to rotate, thereby accelerating the mixing of the two. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the composition of an apparatus for preparing a polystyrene-based copolymer.

[0012] Figure 2 This is a schematic diagram of the mixing tank.

[0013] Figure 3 This is a schematic diagram of the polymerization tank.

[0014] Figure 4 This is a schematic diagram of the structure of a demulsifier.

[0015] Figure 5 This is a top-view cross-sectional view of the demulsifier.

[0016] Figure 6 This is a schematic diagram of the filter box.

[0017] In the diagram: 1. Mixing tank; 11. First feed port; 12. Motor; 13. Stirring shaft; 2. First valve; 3. First pipeline; 4. Polymerization tank; 41. Vent pipe; 42. Exhaust pipe; 43. Exhaust valve; 44. Inlet valve; 45. Jacket; 46. Feed pipe; 47. Feed valve; 5. Second pipeline; 6. Second valve; 7. Demulsifier; 71. Discharge pipe; 72. Second feed port; 73. Drain pipe; 74. Third valve; 75. Protective cover; 8. Filter box; 81. Cylindrical opening; 82. Mesh cone; 83. Filter layer. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0019] Detailed implementation method: combined with Figure 1-6As shown, an apparatus for preparing a polystyrene-based copolymer includes a mixing tank 1. A first feeding port 11 is provided at the top of the mixing tank 1, through which raw materials can be added. The bottom of the mixing tank 1 is connected to the top of a polymerization tank 4 via a first pipe 3. The bottom of the mixing tank 1 is higher than the top of the polymerization tank 4, and all parts of the first pipe 3 are lower than the bottom of the mixing tank 1. A first valve 2 is provided on the first pipe 3. A jacket 45 is provided on the outer side of the bottom of the polymerization tank 4. Oil inlets are provided on both sides of the jacket 45. In use, these two oil inlets are connected to a hot oil supply device, and hot oil (at a temperature of 70°C) continuously flows through the jacket 45 to heat the polymerization tank 4. A vent pipe 41 and a feeding pipe 46 are also provided at the top of the polymerization tank 4. The feeding pipe 46 is equipped with a feeding valve 47, and the vent pipe 41 is equipped with an air inlet valve 44. The air inlet valve 44 is connected to a pressure nitrogen source (which can be a nitrogen cylinder, with a pressure reducing valve connected to the nitrogen cylinder, and the pressure of the nitrogen coming out of the pressure reducing valve is greater than atmospheric pressure) through a pipe. The second pipe 5 penetrates downward through the top cover of the polymerization tank 4 and its bottom is close to the bottom surface of the inner cavity of the polymerization tank 4. The other end of the second pipe 5 (which is higher than the top of the polymerization tank 4) extends into the upper part of the demulsifying tank 7 and is connected to an outlet pipe 71. The second pipe 5 is equipped with a second valve 6. The top of the demulsifying tank 7 is equipped with a second feeding port 72. The bottom of the demulsifying tank 7 is equipped with a drain pipe 73. The drain pipe 73 is equipped with a third valve 74. A filter box 8 is installed below the drain pipe 73. In use, a certain amount of 4-fluorostyrene (4-FSt), methyl methacrylate (MMA), sodium dodecylbenzenesulfonate (acting as an emulsifier), and water are added to the mixing tank 1 through the first feed port 11. After all the above raw materials are completely dissolved in the water, they are left to stand for a period of time for pre-emulsification. Then, the first valve 2 is opened to allow the pre-emulsified solution to flow into the polymerization tank 4. The first valve 2 is then closed. After the temperature of the solution in the polymerization tank 4 reaches 70°C (this can be controlled by time, i.e., after a certain period of time, such as two hours, the solution temperature is considered to have reached 70°C; alternatively, a thermocouple inserted into the polymerization tank 4 can be used to measure the solution temperature), a certain amount of potassium persulfate is added to the polymerization tank 4 through the feed pipe 46. Aqueous solution (then feed valve 47 is closed). At this time, 4-fluorostyrene and methyl methacrylate polymerize to form P(4FSt-MMA). After a certain period of time (preferably 24 hours), the second valve 6 is opened, followed by the air inlet valve 44. Under the action of pressurized nitrogen, the liquid in the polymerization tank 4 (still in an emulsion state) enters the demulsification tank 7 (then air inlet valve 44 is closed). An appropriate amount of saturated brine has been added to the demulsification tank 7 in advance (through the second feed port 72). The emulsion entering the demulsification tank 7 is demulsified, and P(4FSt-MMA) precipitates out. Then the third valve 74 is opened, and the solution in the demulsification tank 7 flows into the filter box 8 for filtration. The precipitate obtained is P(4FSt-MMA).

[0020] The filter box 8 has a cylindrical opening 81 at its top, and a mesh cone 82 is placed at the upper opening of the cylindrical opening 81. A filter layer 83 is disposed inside the mesh cone 82, and the filter layer 83 is located directly below the drain pipe 73. Sediment remains on the filter layer 83, while liquid flows into the filter box 8. The mesh cone 82, along with the filter layer 83, can be removed from the cylindrical opening 81 for sediment collection.

[0021] A motor 12 is installed on the top of the mixing tank 1, and a stirring shaft 13 is rotatably connected inside the mixing tank 1. The stirring shaft 13 is equipped with multiple blades and is connected to the motor 12 for transmission. It can be stirred during pre-emulsification to improve the speed and effect of pre-emulsification.

[0022] An exhaust pipe 42 is provided on one side of the vent pipe 41. The exhaust pipe 42 is located on the side of the inlet valve 44 near the polymerization tank 4, and an exhaust valve 43 is provided on the exhaust pipe 42. In use, after opening the first valve 2, the exhaust valve 43 is then opened, allowing the liquid in the mixing tank 1 to easily enter the polymerization tank 4.

[0023] The outlet of the liquid outlet pipe 71 faces obliquely downwards. The projection of the direction in which the liquid sprays out from the outlet of the liquid outlet pipe 71 onto the horizontal plane is tangent to the projection of the inner wall of the demulsifying tank 7 onto the horizontal plane. This causes the emulsion to spray obliquely downwards onto the saturated brine, resulting in a rotation of the mixture of saturated brine and emulsion, thereby accelerating the mixing of the two. The extension direction of the liquid outlet pipe 71 can be a segment (approximately one-eighth) of a cylindrical helix.

[0024] The lower part of the drain pipe 73 is provided with a support ring, and the support ring is provided with a protective cover 75 that can slide up and down. The protective cover 75 is made of transparent material. When the second valve 6 is opened, the operator can observe the liquid level in the filter layer 83 through the protective cover 75.

[0025] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. An apparatus for preparing polystyrene-based copolymers, characterized in that: The system includes a mixing tank (1), with a first feeding port (11) at the top. The bottom of the mixing tank (1) is connected to the top of the polymerization tank (4) via a first pipe (3) equipped with a first valve (2). A jacket (45) is provided on the outer side of the bottom of the polymerization tank (4), and oil inlets are provided on both sides of the jacket (45). The top of the polymerization tank (4) is also provided with a vent pipe (41) and a feeding pipe (46) equipped with a feeding valve (47). An air inlet valve (44) is provided on the vent pipe (41). A second pipe... The second pipe (5) penetrates the top cover of the polymerization tank (4) downwards and its bottom is close to the bottom surface of the inner cavity of the polymerization tank (4). The other end of the second pipe (5) extends into the upper part of the demulsifying tank (7) and is connected to the outlet pipe (71). A second valve (6) is provided on the second pipe (5). A second feed port (72) is provided at the top of the demulsifying tank (7). A drain pipe (73) is provided at the bottom of the demulsifying tank (7). A third valve (74) is provided on the drain pipe (73). A filter box (8) is provided below the drain pipe (73).

2. The apparatus for preparing a polystyrene-based copolymer according to claim 1, characterized in that: The top of the filter box (8) is provided with a cylindrical opening (81), and a mesh cone (82) is placed at the upper opening of the cylindrical opening (81). A filter layer (83) is provided inside the mesh cone (82).

3. The apparatus for preparing a polystyrene-based copolymer according to claim 1, characterized in that: A motor (12) is installed on the top of the mixing tank (1), and a stirring shaft (13) is rotatably connected inside the mixing tank (1). Multiple blades are installed on the stirring shaft (13), and the stirring shaft (13) is connected to the motor (12) in a transmission.

4. The apparatus for preparing a polystyrene-based copolymer according to claim 1, characterized in that: An exhaust pipe (42) is provided on one side of the vent pipe (41). The exhaust pipe (42) is located on the side of the inlet valve (44) close to the polymerization tank (4). An exhaust valve (43) is provided on the exhaust pipe (42).

5. The apparatus for preparing a polystyrene-based copolymer according to claim 1, characterized in that: The outlet of the liquid outlet pipe (71) faces obliquely downward, and the projection of the direction of the liquid spraying out from the outlet of the liquid outlet pipe (71) on the horizontal plane is tangent to the projection of the inner wall of the demulsifier (7) on the horizontal plane.

6. The apparatus for preparing a polystyrene-based copolymer according to any one of claims 1-5, characterized in that: The lower part of the drain pipe (73) is provided with a support ring, and the support ring is provided with a protective cover (75) that can slide up and down.

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