Polymer emulsion polymerization device

Abstract

The high polymer emulsion polymerization device comprises a container body, a cover body is detachably installed on the top of the container body, a rotating shaft is installed on the cover body, and the rotating shaft penetrates through the cover body and can rotate along the axis of the rotating shaft; the rotating shaft comprises a main shaft body located on the lower portion, and the main shaft body extends into the container body. The rod body penetrates through the main shaft body, the axial direction of the rod body is perpendicular to the axial direction of the main shaft body, the rod body can move along the axis of the rod body, a stirring plate is installed at one end of the rod body, and a balancing weight is installed at the other end of the rod body. The ends, away from the main shaft body, of the stirring plates abut against the inner wall face of the container body, and the ends, provided with the balancing weights, of the rod bodies tend to rotate downwards. The invention provides a high polymer emulsion polymerization device for improving the temperature control capability.

Description

Technical Field

[0001] The present invention relates to the technical field of emulsion polymerization equipment, and more particularly to a high polymer emulsion polymerization device. Background Art

[0002] Polymer emulsion polymerization reactors typically utilize anchor / frame agitators for stirring to prevent excessive shear forces from destabilizing micelles and preventing latex particle aggregation or demulsification. Low stirring speeds are also used to further control shear forces. Initially, the RPM is controlled at around 300 to improve efficiency. Later, to minimize post-polymerization demulsification, the RPM is kept between 50 and 100. Low stirring speeds can easily lead to polymer accumulation and deposits on the inner walls of the reaction vessel, impacting heat transfer efficiency and hindering temperature control. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a high polymer emulsion polymerization device to improve the temperature control capability.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a polymer emulsion polymerization device, comprising a container body, a cover body being detachably mounted on the top of the container body, the cover body being mounted with a rotating shaft, the rotating shaft passing through the cover body, and the rotating shaft being able to rotate along its own axis; the rotating shaft comprises a main shaft body located below, the main shaft body extending into the container body; it also comprises a rod body, the rod body passing through the main shaft body, the axial direction of the rod body being perpendicular to the axial direction of the main shaft body, the rod body being able to move along its own axis, a stirring plate being mounted at one end of the rod body, and a counterweight being mounted at the other end. When the stirring plate is located at an extreme position away from the main shaft body, the end of the stirring plate away from the main shaft body abuts against the inner wall surface of the container body, and the end of the rod body mounted with the counterweight has a tendency to rotate downward; it also comprises a ring portion, the ring portion is located below the cover body, the ring portion can move up and down, a magnetic component 1 is mounted on the inner wall of the ring portion, a magnetic component 2 is mounted on the top of the counterweight, and when the ring portion is located at the lower end extreme position, the magnetic component 2 is arranged relative to the magnetic component 1 inside and outside.

[0005] The present invention is further configured such that a linear bearing is installed on the inner wall of the main shaft, the rod body includes a second rod portion, the second rod portion passes through the linear bearing, and the second rod portion is slidably connected to the linear bearing.

[0006] The present invention is further configured such that the rod body includes a rod portion three, and a counterweight block is installed on the rod portion three.

[0007] The present invention is further configured such that a retaining ring is installed on the outer wall of the rod body, the retaining ring is located on the side of the main shaft body away from the counterweight block, and a spring is sleeved on the outer wall of the rod body, one end of the spring abuts the main shaft body and the other end abuts the retaining ring. When the magnetic component 1 is at the upper limit position, the magnetic component 2 is offset downward from the magnetic component 1, and the stirring plate abuts against the inner wall surface of the container body through the action of the spring.

[0008] The present invention is further configured such that the main shaft body is provided with a channel 1, the channel 1 is located on the side of the main shaft body away from the counterweight block, the rod body includes a rod portion 1, the rod portion 1 can be inserted into the channel 1, the channel 1 is a tapered hole, and the rod portion 1 is a cone that matches the hole wall of the channel 1.

[0009] The present invention is further configured such that the stirring plate includes an extension plate located at the bottom, a drainage surface is provided on the top of the extension plate, and the drainage surface is arc-shaped.

[0010] The present invention is further configured such that a plurality of magnetic components are provided along the circumference of the ring portion.

[0011] The present invention is further configured such that the cover body is mounted with a motor, the motor is connected to a gear pair, and the gear pair is connected to the rotating shaft.

[0012] The present invention is further configured such that a bearing is installed on the inner wall of the cover, a rotating shaft is installed on the bearing, and the rotating shaft passes through the bearing.

[0013] In summary, the present invention has the following beneficial effects:

[0014] 1. By reducing the spindle speed, the centrifugal force of the rod on the side of the counterweight is reduced. Under the action of the spring, the stirring plate extends to abut the inner wall of the container. As the stirring plate continues to rotate, the deposited fluid on the inner wall of the container is cleaned, thereby ensuring the heat dissipation capacity of the container and improving the temperature control ability.

[0015] 2. The weight of the counterweight on one side of the rod is greater than that on the other side. Therefore, when the rod rotates, the centrifugal force on the side of the counterweight is greater, and the rod tends to move toward the side of the counterweight, thereby ensuring a stable distance between the stirring plate and the inner wall of the container to ensure appropriate shear force, improve mixing uniformity and reduce the phenomenon of fluid hanging on the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A cross-sectional view of an embodiment Figure 1 ;

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 for Figure 1 Partial cross-sectional view along the MM direction;

[0019] Figure 4 Schematic diagram of the installation of the stirring plate in the embodiment;

[0020] Figure 5 A cross-sectional view of an embodiment Figure 2 ;

[0021] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0022] Figure numerals: container body 1, cover body 11, motor 111, gear pair 112, driving component 113, bearing 114, rotating shaft 2, main shaft body 21, channel one 211, channel two 212, cylinder body 3, ring part 31, magnetic component one 311, rod body 4, rod part one 41, rod part two 42, rod part three 421, groove body 43, spring 44, retaining ring 45, stirring plate 5, extension plate 51, drainage surface 511, counterweight block 6, magnetic component two 61, linear bearing 7. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, this embodiment discloses a polymer emulsion polymerization device, including a container body 1, a cover body 11 is detachably installed on the top of the container body 1, the cover body 11 is fixed, and the container body 1 can be moved downward to separate from the cover body 11. After the container body 1 and the cover body 11 are fixed, the container body 1 is limited, and the outer surface of the container body 1 dissipates heat by blowing air.

[0025] like Figure 1 As shown, the cover 11 is mounted with a rotating shaft 2, which passes through the cover 11 and is capable of rotating along its own axis. Specifically, a motor 111 is mounted on the upper end of the cover 11. The output shaft of motor 111 is connected to a gear pair 112. One gear of gear pair 112 is connected to the output shaft of motor 111, and the other gear of gear pair 112 is connected to rotating shaft 2. Driven by motor 111, rotating shaft 2 rotates. A bearing 114 is mounted on the inner wall of the cover 11. Rotating shaft 2 is mounted on bearing 114 and passes through bearing 114.

[0026] like Figure 1 As shown, the upper end of the cover 11 is also equipped with a driving component 113, which is a cylinder. The output end of the driving component 113 passes through the cover 11 and is equipped with a cylinder 3. The cylinder 3 is located below the cover 11 and moves up and down under the drive of the driving component 113. The cylinder 3 includes a ring portion 31 located below, and a magnetic component 311 is installed on the inner wall of the ring portion 31. Figure 3 As shown, a plurality of magnetic components 311 are provided along the circumference of the ring portion 31 .

[0027] like Figure 1As shown, the rotating shaft 2 includes a main shaft body 21 located at the bottom, and the main shaft body 21 extends into the container body 1. The main shaft body 21 is installed with a rod body 4, and the rod body 4 passes through the main shaft body 21. The main shaft body 21 is vertically arranged in the axial direction, and the rod body 4 is perpendicular to the axial direction of the main shaft body 21. The rod body 4 can move along its own axis. Specifically, as shown in FIG. Figure 2 As shown, the main shaft body 21 is provided with a second hole 212, and the second hole 212 is fixedly installed with a linear bearing 7. The rod body 4 includes a second rod portion 42, which passes through the linear bearing 7 and is slidably connected to the linear bearing 7. A stirring plate 5 is installed at one end of the rod body 4, and a counterweight 6 is installed at the other end. A second magnetic component 61 is installed on the top of the counterweight 6. When the ring portion 31 is at the lower end limit position, the second magnetic component 61 and the first magnetic component 311 are arranged relative to each other inside and outside. Under the mutual attraction between the second magnetic component 61 and the first magnetic component 311, they move closer to each other so that Figure 1 The rod body 4 in the shown position moves to the left to the left extreme position, and the magnetic component 2 61 and the magnetic component 1 311 are always kept separated. A retaining ring 45 is installed on the outer wall of the rod body 4. The retaining ring 45 is located on the side of the main shaft body 21 away from the counterweight 6. A spring 44 is sleeved on the outer wall of the rod body 4. One end of the spring 44 abuts the main shaft body 21 and the other end abuts the retaining ring 45. Figure 5 As shown, the rod body 4 includes a rod portion 3 421, and the rod portion 3 421 is installed with a counterweight 6. When the magnetic component 1 311 is at the upper limit position, the magnetic component 2 61 and the magnetic component 1 311 are offset downward, and the stirring plate 5 is in contact with the inner wall surface of the container body 1 through the action of the spring 44, thereby realizing the left and right movement of the rod body 4. At the same time, when the stirring plate 5 is in the extreme position away from the main shaft body 21, the end of the stirring plate 5 away from the main shaft body 21 abuts against the inner wall of the container body 1, and the end of the rod body 4 equipped with the counterweight 6 tends to rotate downward, that is, the weight of the counterweight 6 on one side of the rod body 4 is greater than the other side. Therefore, when the rod body 4 rotates, the centrifugal force of the rod body 4 on the side of the counterweight 6 is greater, and the rod body 4 tends to move toward the side of the counterweight 6, thereby ensuring that a gap is formed between the stirring plate 5 and the inner wall of the container body 1. The gap between the stirring plate 5 and the inner wall of the container body 1 is 0.05-0.12 times the inner diameter of the container body 1. In the early stage of the polymerization reaction, if the gap is too small and the main shaft 21 maintains a speed of 300rpm, it is easy to cause excessive local shear, increase energy consumption, and easily cause scraping between the stirring plate 5 and the inner wall of the container body 1, resulting in increased heat, which is not conducive to controlling the reaction temperature. The scraping phenomenon at high speed also affects the service life of the stirring plate 5. When the distance between the stirring plate 5 and the inner wall of the container body 1 is too large, a dead zone is easily formed on the inner wall of the container body 1, resulting in uneven mixing. At the same time, the boundary layer on the inner wall of the container body 1 thickens, the heat transfer efficiency decreases, and a low flow velocity area is easily formed on the inner wall of the container body 1, which makes it more likely for the fluid to stick to the wall.

[0028] like Figure 2As shown, the main shaft body 21 is provided with a hole 211, which is located on the side of the main shaft body 21 away from the counterweight 6. The rod body 4 includes a rod portion 41, which can be inserted into the hole 211. The hole 211 is a tapered hole, and the rod portion 41 is a tapered shape that matches the hole wall of the hole 211. When the stirring plate 5 is located closest to the main shaft body 21, the rod portion 41 abuts against the hole wall of the hole 211 to form a limit position. Figure 5 、 Figure 6 As shown, when the counterweight 6 moves to the extreme position close to the main shaft body 21, the counterweight 6 abuts the linear bearing 7, and the linear bearing 7 forms a limit for the counterweight 6. The stirring plate 5 and the inner wall of the container body 1 are abutted at this time, thereby reducing the force between the stirring plate 5 and the inner wall of the container body 1, preventing the friction resistance generated by the stirring plate 5 and the inner wall of the container body 1 when rotating from being too large and aggravating the wear, but ensuring that the stirring plate 5 has a cleaning effect on the sediment on the inner wall of the container body 1, improving the mixing uniformity, and solving the problem of weakened heat dissipation ability caused by sedimentation.

[0029] like Figure 4 As shown, the rod body 4 is provided with a groove body 43, and the stirring plate 5 is inserted into the groove body 43 and fixedly installed.

[0030] like Figure 1 As shown, the stirring plate 5 includes an extension plate 51 located at the bottom, and a drainage surface 511 is provided on the top of the extension plate 51. The drainage surface 511 is arc-shaped, and the drainage surface 511 forms a highly streamlined change in the radial direction of the main shaft body 21 in the up and down directions. In order to reduce the stirring shear force, the stirring plate 5 adopts a semi-frame design. In order to improve the axial flow of the fluid, the drainage surface 511 is provided, which is beneficial to the uniformity and efficiency of mixing.

[0031] The specific usage is:

[0032] ① Install the container body 1 containing the polymer emulsion and the cover body 11.

[0033] ② The cylinder 3 moves downward to the lower limit position, so that the magnetic component 1 311 moves downward synchronously. The magnetic component 1 311 magnetically attracts the magnetic component 2 61 to separate the stirring plate 5 from the inner wall of the container body 1. The distance between the stirring plate 5 and the inner wall of the container body 1 is 0.05-0.12 times the inner diameter of the container body 1.

[0034] ③ Start the main shaft 21, and the agitator 5 rotates synchronously to generate stirring. The main shaft 21 rotates at a speed of 280-320 r / min (i.e., 300 RPM). By separating the agitator 5 from the inner wall of the container 1 before starting the main shaft 21, friction between the agitator 5 and the inner wall of the container 1 is effectively reduced during startup, reducing wear.

[0035] ④ Cylinder 3 moves upward, causing magnetic component 1 311 to be vertically offset from magnetic component 2 61, reducing the rotational resistance of spindle 21 and lowering energy consumption. At this point, because the centrifugal force on rod 4 is greater on the side of counterweight 6, rod 4 tends to move toward counterweight 6, thereby maintaining a stable spacing between stirring plate 5 and the inner wall of container 1.

[0036] ⑤ After stirring for a certain period of time, the main shaft 21 reduces its rotation speed to below 80RPM, the centrifugal force of the rod 4 on the side of the counterweight 6 is reduced, and the stirring plate 5 is extended to abut the inner wall of the container body 1 under the action of the spring 44. As the stirring plate 5 continues to rotate, the deposited fluid on the inner wall of the container body 1 is cleaned, thereby ensuring the heat dissipation capacity of the container body 1 and improving the temperature control ability.

[0037] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A high polymer emulsion polymerization device, characterized in that: The container (1) comprises a container body (1), a cover (11) being detachably mounted on the top of the container body (1), a rotating shaft (2) being mounted on the cover (11), the rotating shaft (2) passing through the cover (11), and the rotating shaft (2) being capable of rotating along its own axis; The rotating shaft (2) includes a main shaft body (21) located below, and the main shaft body (21) extends into the container body (1); The invention also includes a rod body (4), the rod body (4) passes through the main shaft body (21), the axial direction of the rod body (4) is perpendicular to the axial direction of the main shaft body (21), the rod body (4) can move along its own axis, one end of the rod body (4) is installed with a stirring plate (5), and the other end is installed with a counterweight (6), when the stirring plate (5) is located at an extreme position away from the main shaft body (21), the end of the stirring plate (5) away from the main shaft body (21) abuts against the inner wall surface of the container body (1), and the end of the rod body (4) installed with the counterweight (6) has a tendency to rotate downward; The invention also includes a ring portion (31), the ring portion (31) is located below the cover body (11), the ring portion (31) can move up and down, a magnetic component 1 (311) is installed on the inner wall of the ring portion (31), and a magnetic component 2 (61) is installed on the top of the counterweight (6). When the ring portion (31) is located at the lower extreme position, the magnetic component 2 (61) and the magnetic component 1 (311) are arranged relative to each other inside and outside.

2. A high polymer emulsion polymerization device according to claim 1, characterized in that: A linear bearing (7) is installed on the inner wall of the main shaft body (21), and the rod body (4) includes a second rod portion (42). The second rod portion (42) passes through the linear bearing (7), and the second rod portion (42) is slidably connected to the linear bearing (7).

3. A high polymer emulsion polymerization device according to claim 1, characterized in that: The rod body (4) includes a rod portion three (421), and the rod portion three (421) is installed with the counterweight block (6).

4. A high polymer emulsion polymerization device according to claim 1, characterized in that: A retaining ring (45) is installed on the outer wall of the rod body (4), and the retaining ring (45) is located on the side of the main shaft body (21) away from the counterweight (6). A spring (44) is sleeved on the outer wall of the rod body (4), and one end of the spring (44) abuts against the main shaft body (21) and the other end abuts against the retaining ring (45). When the magnetic component 1 (311) is located at the upper limit position, the magnetic component 2 (61) and the magnetic component 1 (311) are offset downward, and the stirring plate (5) abuts against the inner wall surface of the container body (1) through the action of the spring (44).

5. A high polymer emulsion polymerization device according to claim 1, characterized in that: The main shaft body (21) is provided with a hole (211), and the hole (211) is located on the side of the main shaft body (21) away from the counterweight (6). The rod body (4) includes a rod portion (41), and the rod portion (41) can be inserted into the hole (211). The hole (211) is a tapered hole, and the rod portion (41) is a cone that matches the hole wall of the hole (211).

6. A high polymer emulsion polymerization device according to claim 1, characterized in that: The stirring plate (5) comprises an extension plate (51) located at the bottom, and a drainage surface (511) is provided on the top of the extension plate (51), and the drainage surface (511) is arc-shaped.

7. The high polymer emulsion polymerization device according to claim 1, characterized in that: A plurality of magnetic components (311) are arranged along the circumference of the ring portion (31).

8. The high polymer emulsion polymerization device according to claim 1, characterized in that: The cover body (11) is equipped with a motor (111), the motor (111) is connected to a gear pair (112), and the gear pair (112) is connected to the rotating shaft (2).

9. The high polymer emulsion polymerization device according to claim 1, characterized in that: A bearing (114) is installed on the inner wall of the cover body (11), the rotating shaft (2) is installed on the bearing (114), and the rotating shaft (2) passes through the bearing (114).

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