Constant-temperature reaction kettle for polyacrylamide polymerization

Abstract

The utility model relates to the technical field of reaction kettle discloses a constant temperature reaction kettle for polyacrylamide polymerization, including kettle body, the kettle body outside fixedly connected with the jacket, the kettle body is fixedly connected with the base on, the base is fixedly connected with first motor on, and the output of first motor is fixedly connected with first stirring shaft, and first stirring shaft lower end extends to the kettle body, the kettle body is fixedly connected with second motor on the position close to the base, and first motor and second motor are electrically connected with external main control ware through wire respectively. Through setting up multiple synchronous rotation's flow guide base, and the adjacent two flow guide bases are opposite settings, cooperate inside and open multiple oblique flow guide grooves, can form directional push and extrusion effect to material in the rotating process, after material enters along the flow guide groove, is forced to push out through the liquid outlet narrowing section, forms multiple jet, effectively breaks the original laminar state, makes long chain high molecule to occur stagger, collision and dispersion, avoids with the flow field same direction movement.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and in particular to a constant temperature reaction vessel for polyacrylamide polymerization. Background Technology

[0002] The closed reaction equipment for producing polyacrylamide will choose a constant temperature reactor for reaction preparation, mainly to provide a stable temperature, stirring and reaction environment for aqueous solution polymerization reaction;

[0003] A constant-temperature reactor consists of a vessel body, a jacket, a stirring system, a temperature control system, and a sealing device. Constant temperature control is achieved through a circulating medium in the jacket, preventing localized overheating caused by exothermic reactions. For example, Chinese utility model patent CN221132215U describes a reactor comprising a material inlet connected to the top and a discharge outlet vertically connected to the bottom. It also includes a stirring assembly for mixing materials within the reactor, and a cleaning component for scraping the inner wall of the reactor. Similar to existing commonly used reactors, the internal stirring blades and rods move axially. While this allows for large-scale overall material agitation, the polyacrylamide gradually forms a long-chain polymer structure during the reaction, causing the system viscosity to continuously increase. Traditional axial stirring only creates localized circulation, resulting in insufficient exchange of materials in the radial and vertical directions. This easily leads to uneven temperature and concentration. The materials gradually form long-chain polymer structures, and these long-chain molecules tend to move in the same direction with the flow field created by stirring, making it difficult for molecules to achieve interleaved or convective mixing effects, thus hindering effective dispersion. This results in uneven mixing within the system, insufficient contact between monomers and initiators, and consequently restricts overall reaction efficiency, making it difficult to further improve mixing and reaction efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a constant temperature reactor for polyacrylamide polymerization, in which multiple synchronously rotating relative flow guide seats form a jet through an oblique flow guide groove and a narrowed liquid outlet, breaking laminar flow and improving the uniformity of polymer mixing, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A constant-temperature reactor for polyacrylamide polymerization includes a reactor body, a jacket fixedly connected to the outside of the reactor body, a base fixedly connected to the reactor body, a first motor fixedly connected to the base, a first stirring shaft fixedly connected to the output end of the first motor, and the lower end of the first stirring shaft extending into the reactor body, a second motor fixedly connected to the reactor body near the base, the first motor and the second motor being electrically connected to an external main controller via wires, the output end of the second motor being fixedly connected to a second stirring shaft extending into the reactor body, two opposing mixers symmetrically fixedly connected to the outside of the second stirring shaft, the opposing mixers also including two flow guide seats, end caps fixedly connected to opposite sides of the two flow guide seats, mounting sleeves fixedly connected to the upper and lower ends of the flow guide seats, and a key sleeve fixedly connected between the two mounting sleeves.

[0007] As a further preferred embodiment of this utility model, the second stirring shaft is placed at an angle of 30 degrees inside the vessel to enable two opposing mixers to mix the materials located in the middle and edge of the vessel, respectively.

[0008] As a further preferred embodiment of this utility model, the guide seat is provided with multiple guide grooves. The bottom surface of the guide groove is curved and raised from the edge contour of the guide seat towards the center. When the guide seat rotates at medium and high speed, it can push the material in the vessel into the guide groove. With the help of the diameter difference between the liquid outlet and the inlet end of the guide seat, the material discharged from the liquid outlet is accelerated out.

[0009] As a further preferred embodiment of this utility model, the end cap has an outlet corresponding to the number of guide channels, and the end cap is used to realize the guide channels forming a complete channel structure.

[0010] As a further preferred embodiment of this utility model, a key shaft is fixedly connected to one of the mounting sleeves, and the flow guide seat, mounting sleeve, and key shaft are interlocked and connected to the second stirring shaft and fixed by bolts. Two adjacent key shafts abut against each other to provide a mounting base for the key sleeve.

[0011] As a further preferred embodiment of this utility model, a plurality of pusher blades are fixedly connected to the outer side of the key sleeve. The key sleeve is inserted and connected to two key shafts. The upper and lower ends of the key sleeve abut against the corresponding mounting sleeves respectively. The materials guided by the lower and upper guide seats accelerate out of the corresponding liquid outlets and collide with each other. The rotating pusher blades quickly push out the material located between the two guide seats.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In this invention, by setting multiple synchronously rotating guide seats, with two adjacent guide seats arranged opposite each other, and in conjunction with multiple inclined guide channels inside, the material can be directionally pushed and squeezed during rotation. After the material enters along the guide channels, it is forcibly pushed out through the narrow section of the liquid outlet, forming multiple jets. This effectively breaks the original laminar flow state, causing long-chain polymers to interweave, collide and disperse, avoiding movement in the same direction with the flow field. This can greatly enhance the radial and circumferential mixing effect, making the material more uniformly mixed. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 This is a planar schematic diagram showing the relative positions of the first stirring shaft and the second stirring shaft of this utility model;

[0016] Figure 3 This is a schematic diagram of the counter-mixer structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the disassembled structure of the counter-mixer of this utility model;

[0018] Figure 5 This is a schematic diagram of the flow guide seat structure of this utility model.

[0019] In the diagram: 1. Kettle body; 2. Jacket; 3. Base; 4. First motor; 5. First stirring shaft; 6. Second motor; 7. Second stirring shaft; 8. Counter-current mixer; 9. Guide seat; 10. End cover; 11. Key sleeve; 12. Pusher blade; 13. Guide groove; 14. Mounting sleeve; 15. Key shaft; 16. Liquid outlet. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] like Figures 1-5As shown, the present invention provides a constant temperature reactor for polyacrylamide polymerization, comprising a reactor body 1, a jacket 2 fixedly connected to the outside of the reactor body 1, a base 3 fixedly connected to the reactor body 1, a first motor 4 fixedly connected to the base 3, a first stirring shaft 5 fixedly connected to the output end of the first motor 4, and the lower end of the first stirring shaft 5 extending into the reactor body 1, a second motor 6 fixedly connected to the reactor body 1 near the base 3, the first motor 4 and the second motor 6 being electrically connected to an external main controller via wires, the output end of the second motor 6 being fixedly connected to a second stirring shaft 7 extending into the reactor body 1, two opposing mixers 8 symmetrically fixedly connected to the outside of the second stirring shaft 7, the opposing mixers 8 also including two flow guide seats 9, end caps 10 fixedly connected to opposite sides of the two flow guide seats 9, mounting sleeves 14 fixedly connected to the upper and lower ends of the flow guide seats 9 respectively, and a key sleeve 11 fixedly connected between the two mounting sleeves 14.

[0022] like Figures 1-2 As shown, the second stirring shaft 7 is placed at an angle of 30 degrees inside the vessel body 1 to enable the two opposing mixers 8 to mix the materials located in the middle and at the edge of the vessel body 1 respectively.

[0023] like Figures 3-5 As shown, the guide seat 9 has multiple guide grooves 13. The bottom surface of the guide groove 13 is curved and raised from the edge contour of the guide seat 9 towards the center. When the guide seat 9 rotates at medium and high speed, it can push the material in the vessel 1 into the guide groove 13. With the help of the diameter difference between the liquid outlet 16 and the inlet end of the guide seat 9, the material discharged from the liquid outlet 16 is accelerated out. The end cover 10 has liquid outlets 16 corresponding to the number of guide grooves 13. The end cover 10 is used to make the guide grooves 13 form a complete channel structure. A key shaft 15 is fixedly connected to one of the mounting sleeves 14. The guide seat 9, the mounting sleeve 14, and the key shaft 15 are inserted and connected to the second stirring shaft 7 and fixed by bolts. Two adjacent key shafts 15 abut against each other to provide an installation base for the key sleeve 11.

[0024] like Figures 3-4 As shown, multiple pusher blades 12 are fixedly connected to the outside of the key sleeve 11. The key sleeve 11 is inserted and connected to two key shafts 15. The upper and lower ends of the key sleeve 11 abut against the corresponding mounting sleeves 14 respectively. The materials guided by the lower guide seat 9 and the upper guide seat 9 are accelerated out of the corresponding liquid outlet 16 and collide with each other. The rotating pusher blades 12 quickly push out the material located between the two guide seats 9.

[0025] It should be noted that this utility model is a constant-temperature reactor for polyacrylamide polymerization. During the polyacrylamide preparation reaction, the jacket 2 covers the outer wall of the reactor body 1, and heat exchange is carried out through the continuously flowing heat transfer medium inside to maintain a constant reaction temperature inside the reactor. After the material is put into the reactor body 1, the first motor 4 is powered on and drives the first stirring shaft 5 to rotate continuously. The first stirring shaft 5 performs a conventional stirring action inside the reactor body 1, turning the internal material as a whole, so that the material forms a basic axial flow, completing the initial mixing and large-scale conveying, and maintaining the basic flow state of the reaction system. Simultaneously, the second motor 6 drives the second stirring shaft 7 to rotate. The second stirring shaft 7 is installed in an inclined manner inside the reactor body 1. During operation, it drives the counter-mixer 8 to rotate synchronously at medium or high speed, and the guide seat 9 on the counter-mixer 8 rotates rapidly with the shaft, relying on centrifugal force. The surrounding material is poured into the guide channel 13. As the bottom of the guide channel 13 gradually rises in an arc from the outside to the center, the material is continuously squeezed and pressurized during its movement in the channel. Then, it is ejected at high speed through the liquid outlet 16 on the end cover 10, forming multiple concentrated jets. The material jets ejected from the two sets of opposite guide seats 9 will directly collide, causing the polyacrylamide long-chain polymers generated by the reaction to interweave, collide and disperse, no longer moving in the same direction as the stirring flow field. At the same time, the pusher blades 12 on the outside of the key sleeve 11 continue to rotate, quickly pushing and transferring the material between the two guide seats 9, strengthening the material exchange in the radial and vertical directions in the reactor, and allowing the reaction monomers and initiators to come into more complete contact. After the second motor 6 runs for a specified time, it is turned off. At this time, the second stirring shaft 7 can continue to stir for a certain period of time, thereby accelerating the mixing efficiency of the material in the early stage of the reaction.

[0026] 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 constant-temperature reactor for polyacrylamide polymerization, characterized in that: The system includes a vessel body (1), a jacket (2) fixedly connected to the outside of the vessel body (1), a base (3) fixedly connected to the vessel body (1), a first motor (4) fixedly connected to the base (3), a first stirring shaft (5) fixedly connected to the output end of the first motor (4), and the lower end of the first stirring shaft (5) extending into the vessel body (1). A second motor (6) is fixedly connected to the vessel body (1) near the base (3). The first motor (4) and the second motor (6) are respectively connected to an external main unit via wires. The controller is electrically connected, and the output end of the second motor (6) is fixedly connected to the second stirring shaft (7) and extends into the vessel body (1); two opposing mixers (8) are symmetrically fixedly connected to the outside of the second stirring shaft (7), and the opposing mixers (8) also include two guide seats (9), and end caps (10) are fixedly connected to the opposite side of the two guide seats (9), and mounting sleeves (14) are fixedly connected to the upper and lower ends of the guide seats (9), and key sleeves (11) are fixedly connected between the two mounting sleeves (14).

2. The constant temperature reaction kettle for polyacrylamide polymerization according to claim 1, characterized in that: The second stirring shaft (7) is installed inside the vessel body (1) at an angle of 30 degrees relative to the vertical direction.

3. The constant temperature reaction kettle for polyacrylamide polymerization according to claim 1, characterized in that: The guide seat (9) has multiple guide grooves (13) inside, and the bottom surface of the guide groove (13) is raised in an arc shape from the edge of the guide seat (9) towards the center.

4. The constant temperature reaction kettle for polyacrylamide polymerization according to claim 3, characterized in that: The end cap (10) has liquid outlets (16) corresponding to the number of guide grooves (13).

5. The constant-temperature reactor for polyacrylamide polymerization according to claim 1, characterized in that: One of the mounting sleeves (14) is fixedly connected to a key shaft (15). The guide seat (9) is inserted into the mounting sleeve (14) and the key shaft (15) and connected to the second stirring shaft (7) by bolts. The two adjacent key shafts (15) abut against each other.

6. The constant-temperature reactor for polyacrylamide polymerization according to claim 5, characterized in that: Multiple pusher blades (12) are fixedly connected to the outside of the key sleeve (11). The key sleeve (11) is inserted and connected to two key shafts (15). The upper and lower ends of the key sleeve (11) respectively abut against the corresponding mounting sleeves (14).

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