Temperature uniformity control device for polyacrylamide reactor

Abstract

The utility model discloses a kind of temperature uniform regulation and control devices of polyacrylamide reaction kettle, it is related to polyacrylamide reaction experiment relevant technical field.The utility model includes main component and temperature control component, main component includes outer tube, outer tube includes through connection in outer tube top end's feeding hopper and through connection in outer tube bottom end's discharge port, outer tube outer circumferential side is also fixed with support frame.The utility model is set up by temperature control component, temperature controller works, heating exchange agent, make it in central shaft and helical blade circulation, due to helical blade coverage area is very large, while it can drive internal solution flow when rotating, greatly increase the uniformity when temperature conduction, solved in relevant scheme heating wire very local setting in reaction kettle inner wall, and coolant can only be set on central shaft, whether heating or cooling will make local temperature sudden change, and overall temperature distribution uneven influence final result problem.

Description

Technical Field

[0001] This utility model belongs to the technical field of polyacrylamide reaction experiments, and in particular relates to a temperature uniform control device for a polyacrylamide reaction vessel. Background Technology

[0002] Polyacrylamide reactors are key equipment for the synthesis of polyacrylamide (PAM). They are usually constructed of stainless steel and are equipped with a jacketed temperature control system, a stirring device, and an inert gas inlet. They can precisely control the temperature, pressure, and material mixing uniformity of the polymerization reaction. Their structural design can effectively prevent polymer agglomeration or local overheating during the reaction process.

[0003] Utility model publication CN216396327U discloses a polyacrylamide polymerization reactor with temperature control function, comprising a reactor shell and a motor; the reactor shell has a feed pipe at the feed inlet on the left side of its upper surface and a discharge pipe at the discharge outlet in the middle of the bottom surface of the reactor shell, with a valve connected in series inside the discharge pipe; the motor is located at the center of the upper surface of the reactor shell, and the motor's output shaft is rotatably connected to the top wall of the reactor shell through a bearing and extends into the interior of the reactor shell, with a hollow rotating rod at the lower end of the motor's output shaft, and symmetrical notches on the upper end of the outer arc surface of the hollow rotating rod; this polyacrylamide polymerization reactor with temperature control function can freely regulate the ambient temperature inside the reactor shell to ensure the reaction process of polyacrylamide, and can also mix and stir the polyacrylamide to accelerate the reaction rate of polyacrylamide.

[0004] However, it still has the following drawbacks in actual use: In the above scheme, the temperature is conducted through heating wires set on the inner wall of the reactor and refrigerant set on the central shaft for heating or heat dissipation. These are all localized. During use, whether heating or heat dissipation, the solution will only experience local temperature changes. In this reaction, local overheating may cause the free radical polymerization rate to run away from control, resulting in excessive growth of polymer molecular chains or cross-linking, producing gel-like byproducts. Low temperature regions may cause the initiator to decompose slowly, resulting in incomplete reaction, increased residual monomers, and affecting product purity. Utility Model Content

[0005] The purpose of this invention is to provide a temperature uniform control device for a polyacrylamide reactor. This invention solves the problem in related solutions where the heating wire is only partially located on the inner wall of the reactor and the refrigerant can only be located on the central axis. This results in sudden changes in local temperature when heating or cooling, and uneven overall temperature distribution affects the final result.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a temperature uniform control device for a polyacrylamide reactor, including a main component and a temperature control component. The main component includes an outer cylinder, which includes a feed hopper connected to the top of the outer cylinder and a discharge port connected to the bottom of the outer cylinder. A support frame is also fixed on the outer periphery of the outer cylinder.

[0008] The temperature control assembly includes an inner cylinder that is vertically fixed to the center of the inner cavity of the outer cylinder. A central shaft is also vertically rotatably connected to the center of the inner cavity of the inner cylinder. A spiral blade is also connected through the outer periphery of the central shaft. A temperature controller is also fixed to the outer periphery of the outer cylinder. The temperature control assembly also includes two temperature transfer liquid conduits that are connected through the two ends of the temperature controller. The ends of the two temperature transfer liquid conduits away from the temperature controller are rotatably connected through the two ends of the central shaft.

[0009] A motor is also fixed at the top of the outer cylinder, and the temperature control component also includes a gear set, with the motor connected to the central shaft via the gear set.

[0010] Furthermore, water passage hole one, water passage hole two, and water passage hole three are respectively provided at the top, center, and bottom of the inner cylinder's circumferential side.

[0011] Furthermore, the spiral blade is provided in two sections, and the two spiral blade sections are mirror images of each other on the central axis.

[0012] Furthermore, the temperature controller is also equipped with a temperature sensor, the sensing end of which penetrates the side wall of the outer cylinder and extends into the inner cavity of the outer cylinder.

[0013] Furthermore, the gear set includes bevel gear one and bevel gear two. Bevel gear one is fixed on the motor power shaft, and bevel gear two is fixed on the outer peripheral side of the central shaft protruding from one end of the outer cylinder, and bevel gear one and bevel gear two mesh with each other.

[0014] Furthermore, an outer shell is fixed to the top of the outer cylinder, and the outer shell is located on the outer periphery of the motor and gear set.

[0015] This utility model has the following beneficial effects:

[0016] 2. This utility model, through its temperature control component, allows the temperature controller to operate during the experiment. The temperature is set to the desired level, heating the heat exchanger and causing it to circulate between the central shaft and the spiral blades. Because the spiral blades cover a large area and rotate, they also drive the internal solution flow, ensuring temperature exchange through the spiral blades. This significantly increases the uniformity of temperature conduction, ultimately enabling more uniform heating in the polyacrylamide reactor experiment. This solves the problem in related solutions where the heating wire is only locally located on the inner wall of the reactor, while the refrigerant can only be placed on the central shaft. This results in sudden temperature changes in certain areas during heating or cooling, leading to uneven overall temperature distribution and affecting the final results.

[0017] 3. This utility model, through its temperature control component, allows experimental materials to be placed in the outer cylinder during use. The temperature control component is then activated to heat and stir the materials. The motor rotates, driving the central shaft through a gear set. Water through the third water passage causes water at the bottom of the outer cylinder to flow upwards under the influence of the spiral blades. Meanwhile, at the top, where the internal liquid solvent may not have fully reached the top of the device, the solution above moves downwards under the influence of the mirrored spiral blades, while the solution below moves upwards, creating a counter-current effect that balances the internal solution density. The counter-current solution then returns to the outer cylinder through the third water passage, repeating the cycle for mixing. This solves the problem that existing reaction agitators can only rotate and stir, but cannot drive the flow of solutions between the upper and lower parts of the cylinder. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the overall appearance of this utility model;

[0019] Figure 2 This is a structural schematic diagram of the cross-section of the outer cylinder of this utility model;

[0020] Figure 3 This is a structural schematic diagram of the cross-section of the inner cylinder of this utility model;

[0021] Figure 4 This is a structural schematic diagram of the inner cylinder of this utility model from a frontal view.

[0022] Figure 5 This is a structural schematic diagram of the cross-section of the central shaft and the spiral blade of this utility model.

[0023] Figure label:

[0024] 1. Main body components; 11. Outer cylinder; 12. Feed hopper; 13. Discharge port; 14. Support frame;

[0025] 2. Temperature control assembly; 21. Inner cylinder; 211. Water inlet 1; 212. Water inlet 2; 213. Water inlet 3; 22. Central shaft; 23. Spiral blade; 24. Temperature transfer liquid conduit; 25. Temperature controller; 251. Temperature sensor; 26. Motor; 27. Gear set; 271. Bevel gear 1; 272. Bevel gear 2; 28. Outer shell. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0027] Please see Figure 1-5As shown, this utility model is a temperature uniform control device for a polyacrylamide reactor, including a main body component 1 and a temperature control component 2. The main body component 1 includes an outer cylinder 11, which includes a feed hopper 12 connected to the top of the outer cylinder 11 and a discharge port 13 connected to the bottom of the outer cylinder 11. A support frame 14 is also fixed on the outer periphery of the outer cylinder 11. The main body component 1 is the main body of the reactor, which is fed through the feed hopper 12 and discharged through the discharge port 13. The support frame 14 on the outer periphery is used to fix and support the entire device. Valves are provided on both the feed hopper 12 and the discharge port 13. The temperature control component 2 is mainly used to control the reaction temperature and keep it at the optimal temperature.

[0028] The temperature control assembly 2 includes an inner cylinder 21 vertically fixed to the center of the inner cavity of the outer cylinder 11. A central shaft 22 is vertically rotatably connected to the center of the inner cavity of the inner cylinder 21. A spiral blade 23 is also connected through the outer periphery of the central shaft 22. A temperature controller 25 is also fixed to the outer periphery of the outer cylinder 11. The temperature control assembly 2 also includes two heat transfer liquid conduits 24 that are connected through the two ends of the temperature controller 25. The ends of the two heat transfer liquid conduits 24 that are away from the temperature controller 25 are rotatably connected through the two ends of the central shaft 22.

[0029] The inner cylinder 21, together with the internal spiral blade 23, can agitate the internal water flow, replacing the function of a stirring element. Both the inner cylinder 21 and the spiral blade 23 are hollow, and a heat exchanger, such as Freon or other highly efficient heat-conducting substances, can be placed inside. The temperature controller 25 is equipped with a temperature sensor 251, which can sense and monitor the internal temperature of the reactor. It is also equipped with a display screen and a heat exchanger, etc., and can change the internal temperature of the reactor by using the set exchanger.

[0030] A motor 26 is also fixed at the top of the outer cylinder 11. The temperature control component 2 also includes a gear set 27. The motor 26 is connected to the central shaft 22 through the gear set 27. The motor 26 and the gear set 27 are used to drive the central shaft 22 and the spiral blade 23 to rotate, so as to realize the stirring function.

[0031] Furthermore, the inner cylinder 21 has water passage holes 1 211, 212, and 3 213 respectively at the top, center, and bottom of its circumferential side. All three sets of water passage holes are used for the flow of the heat transfer liquid between the inner and outer cylinders 11, but their effects are slightly different. Water passage hole 3 213 mainly allows the solution at the bottom of the outer cylinder 11 to flow upward under the action of the spiral blade 23. Because the bottom often has a certain amount of raw material for the polyacrylamide reaction deposited, which may not have completely dissolved, the water passage hole 1 211 is set larger. At the top, because the internal liquid solvent may not have completely reached the top of the device, the water passage hole 1 211 is set vertically more often. Under the action of the mirror-arranged spiral blade 23, the solution above moves downward and the solution below moves upward, forming a counterflow to balance the internal solution density. Water passage hole 3 213 allows the counterflowed solution to return to the outer cylinder 11.

[0032] During this process, the temperature controller 25 will work to heat the exchanger at the set temperature, causing it to circulate between the central shaft 22 and the spiral blades 23. Since the spiral blades 23 have a large coverage area and can drive the internal solution to flow when they rotate, the temperature exchange through the spiral blades 23 greatly increases the uniformity of temperature conduction, ultimately allowing the polyacrylamide reactor experiment to be heated more uniformly.

[0033] Furthermore, the spiral blade 23 is provided with two sections, and the two spiral blade sections 23 are mirror images of each other on the central shaft 22. When the two mirror images of the spiral blade 23 rotate, the top solution moves downward and the bottom solution moves upward, thereby causing the upper and lower solutions to counteract each other and making the internal solution density as similar as possible.

[0034] Furthermore, the temperature controller 25 is also equipped with a temperature sensor 251. The sensing end of the temperature sensor 251 penetrates the side wall of the outer cylinder 11 and extends into the inner cavity of the outer cylinder 11. The temperature sensor 251 can be used to monitor the overall temperature inside the reactor. If there is a change, it can be adjusted by the temperature control component 2 to keep it at the optimal experimental temperature.

[0035] Furthermore, the gear set 27 includes a first bevel gear 271 and a second bevel gear 272. The first bevel gear 271 is fixed on the power shaft of the motor 26, and the second bevel gear 272 is fixed on the outer peripheral side of the central shaft 22 protruding from one end of the outer cylinder 11. The first bevel gear 271 and the second bevel gear 272 mesh with each other. Because the end of the central shaft 22 is connected to the temperature transfer liquid conduit 24, a gear set 27 is needed to change the transmission direction so that the motor 26 can drive the central shaft 22 to rotate normally.

[0036] Furthermore, an outer shell 28 is fixed to the top of the outer cylinder 11. The outer shell 28 is located on the outer periphery of the motor 26 and the gear set 27. The outer shell 28 is mainly used to protect the gear set 27 and prevent damage from external forces.

[0037] The specific working principle of this utility model is as follows: When using this device, the polyacrylamide reaction raw materials and water required for the experiment are placed into the outer cylinder 11 through the feed hopper 12. Then, the temperature control component 2 is activated to heat and stir the mixture. First, the motor 26 rotates, which drives the central shaft 22 to rotate through the gear set 27. As the central shaft 22 rotates, the water through the water passage 213 causes the water at the bottom of the outer cylinder 11 to flow upward under the action of the spiral blade 23. At the top, because the internal liquid solvent may not have completely reached the top of the device, the solution above moves downward under the action of the mirror-set spiral blade 23, while the solution below moves upward. The upward movement creates a counterflow, balancing the density of the internal solution. Then, through the water passage 213, the counterflowed solution returns to the outer cylinder 11, circulating repeatedly for mixing. During this process, the temperature controller 25 operates, heating the exchanger at the set temperature, causing it to circulate between the central shaft 22 and the spiral blades 23. Because the spiral blades 23 have a large coverage area and can drive the internal solution flow during rotation, all solutions exchange temperature through the spiral blades 23, greatly increasing the uniformity of temperature conduction. Ultimately, this allows for more uniform heating in the polyacrylamide reactor experiment.

[0038] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall be protected by the present utility model.

Claims

1. A temperature uniform control device for a polyacrylamide reactor, comprising a main component (1) and a temperature control component (2), characterized in that: The main component (1) includes an outer cylinder (11), the outer cylinder (11) includes a feed hopper (12) that is connected to the top of the outer cylinder (11) and a discharge port (13) that is connected to the bottom of the outer cylinder (11). A support frame (14) is also fixed on the outer periphery of the outer cylinder (11). The temperature control assembly (2) includes an inner cylinder (21) vertically fixed to the center of the inner cavity of the outer cylinder (11), a central shaft (22) vertically rotatably connected to the center of the inner cavity of the inner cylinder (21), a spiral blade (23) penetrating the outer periphery of the central shaft (22), a temperature controller (25) fixed to the outer periphery of the outer cylinder (11), and the temperature control assembly (2) also includes two heat transfer liquid conduits (24) penetrating and connected to both ends of the temperature controller (25). The ends of the two heat transfer liquid conduits (24) away from the temperature controller (25) are respectively rotatably connected to both ends of the central shaft (22). The top of the outer cylinder (11) is also fixed with a motor (26), and the temperature control component (2) also includes a gear set (27). The motor (26) is connected to the central shaft (22) through the gear set (27).

2. The temperature uniform control device for a polyacrylamide reactor according to claim 1, characterized in that: The inner cylinder (21) has a water passage hole 1 (211), a water passage hole 2 (212), and a water passage hole 3 (213) respectively at the top, center, and bottom of its circumferential side.

3. The temperature uniform control device for a polyacrylamide reactor according to claim 1, characterized in that: The spiral blade (23) is provided in two sections, and the two sections of the spiral blade (23) are mirror images of each other on the central axis (22).

4. The temperature uniform control device for a polyacrylamide reactor according to claim 1, characterized in that: The temperature controller (25) is also equipped with a temperature sensor (251), the sensing end of which penetrates the side wall of the outer cylinder (11) and extends into the inner cavity of the outer cylinder (11).

5. The temperature uniform control device for a polyacrylamide reactor according to claim 1, characterized in that: The gear set (27) includes a first bevel gear (271) and a second bevel gear (272). The first bevel gear (271) is fixed on the power shaft of the motor (26), and the second bevel gear (272) is fixed on the outer peripheral side of the central shaft (22) protruding from one end of the outer cylinder (11). The first bevel gear (271) and the second bevel gear (272) mesh with each other.

6. The temperature uniform control device for a polyacrylamide reactor according to claim 5, characterized in that: The top of the outer cylinder (11) is also fixed with a shell (28), which is located on the outer periphery of the motor (26) and the gear set (27).

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