Reaction kettle for producing polyester polyol
By setting multiple protrusions on the inner and outer walls of the reactor, the contact area between the coolant and the reactants is increased, and the inner wall is driven by the agitating shaft to drive the cleaning board to clean the inner wall, the problem of poor cooling effect of the existing reactor is solved, and more efficient heat exchange and faster cooling effect is achieved, while maintaining the clean state of the reactor.
Patent Information
- Application Number
- CN202421317069.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-06-11
AI Technical Summary
When cooling, the existing reactors have limited internal and external heat exchange contact area, resulting in insufficient heat exchange, which reduces the cooling effect.
A reactor including a cooling shell and an inner reactor is designed. The outer wall of the inner reactor is provided with multiple protrusions, which increases the contact area between the coolant and the reactant, and the cleaning plate is driven by the agitating shaft to clean the protruding inner wall to prevent precipitates from adhering.
By increasing the contact area between the inner reactor and the coolant, the heat exchange efficiency is improved and the cooling effect is achieved. At the same time, the design of the cleaning board effectively prevents the accumulation of precipitates and maintains the clean state of the reactor.
Smart Images
Figure CN222789213U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reaction kettles, in particular to a reaction kettle for producing polyester polyols. Background Art
[0002] A reactor is a reaction equipment. In a broad sense, a reactor is a container for physical or chemical reactions. Through the structural design and parameter configuration of the container, the heating, evaporation, cooling and low-speed mixing functions required by the process are realized. It is a pressure vessel used to complete processes such as vulcanization, nitration, hydrogenation, verticalization, polymerization, condensation, etc. When processing polyester polyols, a reactor that can cool down quickly is required.
[0003] At present, the reactor is cooled by water through an external coolant supply device when cooling. However, due to the cylindrical shape of the reactor, the internal and external heat exchange contact area is limited, the heat exchange is not sufficient, and the cooling effect is reduced. Based on this, we propose an improved reactor for the production of polyester polyols. Utility Model Content
[0004] The main purpose of the utility model is to provide a reaction kettle for producing polyester polyols, which can effectively solve the technical problems in the background technology.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A reactor for producing polyester polyols comprises a cooling shell and an inner reactor, wherein a plurality of protrusions are arranged on the outer wall of the inner reactor, a top cover is fixedly connected to the upper end of the inner reactor, a stirring shaft is rotatably connected to the middle part of the top cover, a stirrer is fixedly sleeved on the outer wall of the stirring shaft near the lower end, a discharge pipe is fixedly sleeved on the lower end of the inner reactor, a plurality of protrusions are arranged in the cooling shell, a mounting box is fixedly connected to one side of the cooling shell, a water outlet pipe and a water inlet pipe are fixedly sleeved in the mounting box, and one end of the water outlet pipe and the water inlet pipe are both connected to the interior of the cooling shell.
[0007] As a further solution of the utility model, multiple mounting rings are fixedly sleeved on the outer wall of the stirring shaft, mounting rods are fixedly connected to the outer walls on both sides of the multiple mounting rings, cleaning plates are movably sleeved in the multiple protrusions, and the cleaning plates are fixedly set at one end of the mounting rods.
[0008] As a further solution of the utility model, the outer wall of the cleaning plate is slidably fitted to the inner wall of the protrusion, and the cross-sections of the cleaning plate and the protrusion are both made of a trapezoidal structure.
[0009] As a further solution of the utility model, a mounting screw is rotatably sleeved on the cleaning plate, and one end of the mounting screw is threadedly sleeved in the mounting rod.
[0010] As a further solution of the utility model, the water outlet pipe and the water inlet pipe are rotatably connected to valve one and valve two respectively, and the discharge pipe is rotatably connected to valve three.
[0011] As a further solution of the utility model, an observation port, a feeding port and a motor are fixedly provided on the upper end of the top cover, and the output end of the motor is fixedly connected to the upper end of the stirring shaft.
[0012] As a further solution of the utility model, the inner reaction kettle is fixedly sleeved in the cooling shell, and the lower end of the discharge pipe is arranged to penetrate the cooling shell.
[0013] The beneficial effects of the utility model are as follows:
[0014] By arranging a plurality of protrusions on the inner reactor, the polyester polyol can be filled into the protrusion grooves inside the inner reactor, thereby increasing the contact area between the inner reactor and the cooling liquid circulating outside and improving the heat exchange efficiency;
[0015] By fixing a sleeve mounting ring on the outer wall of the stirring shaft and arranging a mounting rod on the outer wall of the mounting ring, a cleaning plate is installed at the other end of the mounting rod through an installation screw to clean the inner wall of the raised groove, which can effectively prevent the sediment from adhering. The raised cross-section shape is trapezoidal, which is convenient for guiding the material and can prevent the scraped sediment from staying in the raised groove, which is practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the external structure of a reaction kettle for producing polyester polyols according to the utility model;
[0017] Figure 2 This is a schematic diagram of the internal structure of a cooling shell of a reaction kettle for producing polyester polyols according to the utility model;
[0018] Figure 3 This is a schematic diagram of the internal structure of an inner reactor of a reactor for producing polyester polyols according to the utility model;
[0019] Figure 4 The utility model is a schematic diagram of the internal structure of a mounting rod of a reaction kettle for producing polyester polyols.
[0020] In the figure: 1. Cooling shell; 2. Inner reactor; 3. Protrusion; 4. Top cover; 5. Observation port; 6. Feeding port; 7. Stirring shaft; 8. Agitator; 9. Mounting ring; 10. Mounting rod; 11. Cleaning plate; 12. Mounting screw; 13. Mounting box; 14. Water outlet pipe; 15. Water inlet pipe; 16. Discharge pipe; 17. Valve one; 18. Valve two; 19. Valve three. DETAILED DESCRIPTION
[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0022] like Figure 1-4 As shown, a reactor for producing polyester polyols comprises a cooling shell 1 and an inner reactor 2, wherein a plurality of protrusions 3 are arranged on the outer wall of the inner reactor 2, a top cover 4 is fixedly connected to the upper end of the inner reactor 2, a stirring shaft 7 is rotatably connected to the middle part of the top cover 4, a stirrer 8 is fixedly sleeved on the outer wall of the stirring shaft 7 near the lower end, a discharge pipe 16 is fixedly sleeved on the lower end of the inner reactor 2, a plurality of protrusions 3 are all arranged in the cooling shell 1, a mounting box 13 is fixedly connected to one side of the cooling shell 1, a water outlet pipe 14 and a water inlet pipe 15 are respectively fixedly sleeved in the mounting box 13, one end of the water outlet pipe 14 and the water inlet pipe 15 are both connected to the inside of the cooling shell 1, the water outlet pipe 14 and the water inlet pipe 15 are externally connected to a cooling liquid supply device for cooling liquid supply, the cooling liquid enters from the bottom of the cooling shell 1 through the water inlet pipe 15 for heat exchange treatment with the polyester polyol in the inner reactor 2, and the treated liquid enters the cooling liquid supply device through the water outlet pipe 14 for circulation, thereby achieving a rapid cooling effect in the process.
[0023] In this embodiment, a plurality of mounting rings 9 are fixedly sleeved on the outer wall of the stirring shaft 7, mounting rods 10 are fixedly connected to the outer walls on both sides of the plurality of mounting rings 9, a cleaning plate 11 is movably sleeved in the plurality of protrusions 3, and the cleaning plate 11 is fixedly set at one end of the mounting rod 10. When the stirring shaft 7 drives the agitator 8 to stir, the stirring shaft 7 can also synchronously drive the mounting ring 9 to rotate, and then drive the mounting rod 10 to rotate, and the cleaning plate 11 is driven to rotate by the mounting rod 10 to clean the inner wall of the protrusion 3.
[0024] In this embodiment, the outer wall of the cleaning plate 11 is slidably fitted against the inner wall of the protrusion 3, so that the cleaning plate 11 can clean the inner wall of the protrusion 3 during rotation. The cross-sections of the cleaning plate 11 and the protrusion 3 are both made of trapezoidal structures, so that the upper and lower inner walls of the protrusion 3 are both inclined structures, which can prevent sediment from accumulating on the inner wall of the groove of the protrusion 3 and causing cleaning troubles.
[0025] In this embodiment, a mounting screw 12 is rotatably sleeved on the cleaning plate 11, and one end of the mounting screw 12 is threadedly sleeved in the mounting rod 10, so that when the cleaning plate 11 is removed for cleaning and replacement at a later time, the cleaning plate 11 can be easily disassembled from the mounting rod 10 for processing by twisting the mounting screw 12, thereby reducing the difficulty of disassembling and assembling the cleaning plate 11.
[0026] In this embodiment, valve one 17 and valve two 18 are rotatably connected to the water outlet pipe 14 and the water inlet pipe 15 respectively, and valve three 19 is rotatably connected to the discharge pipe 16. Valve one 17 controls the opening or closing of the water outlet pipe 14, valve two 18 controls the opening or closing of the water inlet pipe 15, and valve three 19 controls the opening or closing of the discharge pipe 16.
[0027] In this embodiment, an observation port 5, a feeding port 6 and a motor are fixedly provided on the upper end of the top cover 4. The observation port 5 is used to observe the interior of the inner reactor 2, and the feeding port 6 is used to feed materials into the inner reactor 2. The output end of the motor is fixedly connected to the upper end of the stirring shaft 7. The stirring shaft 7 is driven to rotate by the motor, and then the agitator 8 can be driven to rotate to stir the polyester polyol.
[0028] In this embodiment, the inner reactor 2 is fixedly sleeved in the cooling shell 1, the lower end of the discharge pipe 16 penetrates the cooling shell 1, and the contact surface between the discharge pipe 16 and the cooling shell 1 is sealed by a sealing ring.
[0029] It should be noted that the utility model is a reactor for producing polyester polyols. When in use, the water outlet pipe 14 and the water inlet pipe 15 are connected to an external coolant supply device for coolant supply. The coolant enters the bottom of the cooling shell 1 through the water inlet pipe 15 to exchange heat with the polyester polyol in the inner reactor 2. The treated liquid then enters the coolant supply device through the water outlet pipe 14 for circulation. In this process, a rapid cooling effect is achieved. At the same time, when the stirring shaft 7 drives the agitator 8 to stir, it simultaneously drives the mounting ring 9 to rotate, and then drives the cleaning plate 11 to rotate through the mounting rod 10 to clean the inner wall of the protrusion 3 to prevent sediment from remaining and affecting cleaning.
[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A reactor for producing polyester polyols, comprising a cooling outer shell (1) and an inner reactor (2), characterized in that: A plurality of protrusions (3) are arranged on the outer wall of the inner reaction kettle (2); a top cover (4) is fixedly connected to the upper end of the inner reaction kettle (2); a stirring shaft (7) is rotatably connected to the middle part of the top cover (4); a stirrer (8) is fixedly sleeved on the outer wall of the stirring shaft (7) near the lower end; a discharge pipe (16) is fixedly sleeved on the lower end of the inner reaction kettle (2); the plurality of protrusions (3) are all arranged in the cooling shell (1); a mounting box (13) is fixedly connected to one side of the cooling shell (1); a water outlet pipe (14) and a water inlet pipe (15) are fixedly sleeved in the mounting box (13), respectively; one end of each of the water outlet pipe (14) and the water inlet pipe (15) is connected to the interior of the cooling shell (1).
2. A reaction kettle for producing polyester polyols according to claim 1, characterized in that: A plurality of mounting rings (9) are fixedly sleeved on the outer wall of the stirring shaft (7), mounting rods (10) are fixedly connected to the outer walls on both sides of the plurality of mounting rings (9), and a cleaning plate (11) is movably sleeved in the plurality of protrusions (3), and the cleaning plate (11) is fixedly arranged on one end of the mounting rod (10).
3. A reaction kettle for producing polyester polyols according to claim 2, characterized in that: The outer wall of the cleaning plate (11) is slidably fitted to the inner wall of the protrusion (3), and the cross-sections of the cleaning plate (11) and the protrusion (3) are both made of a trapezoidal structure.
4. A reaction kettle for producing polyester polyols according to claim 2, characterized in that: A mounting screw rod (12) is rotatably sleeved on the cleaning plate (11), and one end of the mounting screw rod (12) is threadedly sleeved in the mounting rod (10).
5. The reactor for producing polyester polyols according to claim 1, characterized in that: The water outlet pipe (14) and the water inlet pipe (15) are rotatably connected to valve one (17) and valve two (18), respectively, and the discharge pipe (16) is rotatably connected to valve three (19).
6. The reaction kettle for producing polyester polyol according to claim 1, characterized in that: An observation port (5), a feeding port (6) and a motor are fixedly arranged on the upper end of the top cover (4), and an output end of the motor is fixedly connected to the upper end of the stirring shaft (7).
7. The reaction kettle for producing polyester polyol according to claim 1, characterized in that: The inner reaction kettle (2) is fixedly sleeved in the cooling outer shell (1), and the lower end of the discharge pipe (16) is arranged to penetrate the cooling outer shell (1).