A rapid cooling device for monochloroacetone

Abstract

The utility model relates to a monochloroacetone preparation field discloses a kind of for the quick cooling device of monochloroacetone, including cooling box, same cooling cylinder is rotationally connected on the upper and lower inner wall of cooling box, high-efficiency circulating cooling mechanism is arranged between the cooling cylinder and cooling box, the bottom of the cooling cylinder is fixedly connected with the discharge pipe with control valve. The utility model has the following advantages and effects: the heat exchange path of cooling medium is prolonged by annular cooling cavity and spiral guide vane design, and the cooling effect is better, and the efficiency is higher, while spiral auger drives bottom material circulation, cooling cylinder positive and negative shaking strengthens wall surface contact, no material stagnation dead angle, greatly improve the uniformity and comprehensiveness of cooling, avoid the situation that local temperature is too high, PLC controller is dynamically adjusted cooling medium flow and stirring speed according to real-time temperature, without manual intervention, avoid supercooling or cooling deficiency.

Description

Technical Field

[0001] This utility model relates to the field of monochloroacetone preparation technology, and in particular to a rapid cooling device for monochloroacetone. Background Technology

[0002] Monochloroacetone, as an important organic chemical raw material, has wide applications in pharmaceuticals, pesticides, dyes, and other fields. Its production process typically involves high temperatures. If it cannot be cooled in a timely and efficient manner, it will not only affect the smooth operation of subsequent production processes but may also cause instability in monochloroacetone due to the high temperature, increasing safety risks.

[0003] However, existing cooling devices for monochloroacetone have shortcomings. Typically, the container containing monochloroacetone is immersed in a coolant, relying on heat conduction for cooling. However, this method suffers from insufficient contact between the coolant and the container, resulting in low heat exchange efficiency and slow cooling speed. Furthermore, the use of only one stirring shaft leads to poor stirring effect, uneven and incomplete cooling, and localized overheating, making it difficult to meet the rapid cooling requirements of large-scale production. Therefore, we propose a rapid cooling device for monochloroacetone to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a rapid cooling device for monochloroacetone to solve the problems mentioned in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a rapid cooling device for monochloroacetone, comprising a cooling tank, wherein the same cooling cylinder is rotatably connected to the upper and lower inner walls of the cooling tank, a high-efficiency circulating cooling mechanism is provided between the cooling cylinder and the cooling tank, a discharge pipe with a control valve is fixedly connected to the bottom of the cooling cylinder, a high-efficiency stirring mechanism is provided between the cooling cylinder, the discharge pipe and the cooling tank, the high-efficiency stirring mechanism includes a stirring and tumbling component and a forward and reverse shaking component, a PLC controller with a display screen is fixedly connected to the front side of the cooling tank, and a feed pipe, a temperature sensor and a pressure relief valve are fixedly connected to the top of the cooling tank.

[0006] A further feature of this invention is that the high-efficiency circulating cooling mechanism includes a pump body, a heat exchanger, and a water tank, which are fixedly connected from top to bottom to one side of the cooling tank, and an annular cooling cavity fixedly sleeved on the outside of the cooling cylinder. The pump body, heat exchanger, and water tank are connected from top to bottom. An upper flexible hose is fixedly connected between the top of the pump body and the cooling cylinder, and a flow valve is installed on the upper flexible hose. A lower flexible hose is fixedly connected between the water tank and the cooling cylinder. Multiple heat dissipation fins are fixedly connected to one side of the heat exchanger. A spiral guide vane is fixedly sleeved inside the annular cooling cavity. The pump body, flow valve, heat exchanger, pressure relief valve, and temperature sensor are all electrically connected to the PLC controller.

[0007] By adopting the above technical solution, the pump body is started to transport the chilled brine in the water tank to the annular cooling chamber. After being guided by the spiral guide vanes, it flows back to the water tank through the lower hose. After being cooled by the heat exchanger, it is recycled. The heat exchange fins greatly improve the heat exchange and cooling effect of the heat exchanger. Due to the setting of the upper and lower hoses, it does not hinder the small-amplitude swaying of the cooling cylinder. Guided by the spiral guide vanes, the cooling medium can be guided to flow along the spiral path, avoiding medium short circuit, extending the heat exchange time, and improving the heat exchange efficiency.

[0008] A further feature of this invention is that an inlet valve and an outlet valve are fixedly connected to one side of the water tank from top to bottom.

[0009] By adopting the above technical solution, it is convenient to regularly replace the frozen brine in the water tank.

[0010] A further feature of this invention is as follows: the stirring and churning assembly includes a servo motor fixedly mounted on the top of the cooling tank, a stirring shaft fixedly connected to the output shaft of the servo motor, three irregularly shaped stirring paddles fixedly connected to the outer side of the stirring shaft, and a spiral auger fixedly sleeved on the outer side of the stirring shaft below the irregularly shaped stirring paddles. The forward and reverse swaying assembly includes a connecting plate fixedly connected to one side of the cooling cylinder, a drive pulley rotatably sleeved on the outer side of the stirring shaft, and a rotating shaft rotatably connected to the top of the cooling tank. A driven pulley is fixedly connected to the top of the rotating shaft, and the drive pulley and the driven pulley are connected by the same belt. A rotating plate is fixedly connected to the bottom of the rotating shaft, and a drive column is fixedly connected to the bottom of the rotating plate. An elongated hole is opened on the top of the connecting plate, and the drive column is slidably sleeved in the elongated hole.

[0011] By adopting the above technical solution, the servo motor drives the stirring shaft to rotate, and the irregularly shaped stirring paddle and the spiral auger begin to stir. The spiral auger churns the monochloroacetone from bottom to top, resulting in better stirring. The stirring shaft drives the active pulley to rotate, and the belt drives the driven pulley and the rotating shaft. The rotating plate drives the drive column to push the connecting plate, causing the cooling cylinder to oscillate in both directions. Under the oscillation of the cooling cylinder and the stirring of the irregularly shaped stirring paddle and the spiral auger, the stirring is better, more uniform and comprehensive, thereby improving the uniformity and comprehensiveness of cooling and avoiding the occurrence of local overheating.

[0012] A further feature of this invention is that the spiral auger is located inside the discharge pipe.

[0013] By adopting the above technical solution, the auger can be rotated in reverse during discharge to ensure smooth discharge of chloroacetone.

[0014] A further feature of this invention is that a mounting bracket is fixedly connected to the top of the cooling box, and the servo motor is fixedly connected to the top of the mounting bracket.

[0015] By adopting the above technical solution, it is convenient to support and fix the servo motor.

[0016] A further feature of this invention is that the cooling cylinder and the discharge pipe are rotatably connected between the upper and lower inner walls of the cooling box via bearings.

[0017] By adopting the above technical solutions, the smoothness and stability of the cooling cylinder rotation are improved.

[0018] The beneficial effects of this utility model are:

[0019] 1. This utility model starts the pump body, which transports the chilled brine in the water tank to the annular cooling chamber. After being guided by the spiral guide vanes, it flows back to the water tank through the lower hose. After being cooled by the heat exchanger, it is recycled. The heat dissipation fins greatly improve the heat exchange and cooling effect of the heat exchanger. Due to the setting of the upper and lower hoses, it does not hinder the small-amplitude swaying of the cooling cylinder. Guided by the spiral guide vanes, the cooling medium can be guided to flow along the spiral path, avoiding medium short circuit, extending the heat exchange time, and improving the heat exchange efficiency.

[0020] 2. The servo motor of this utility model drives the stirring shaft to rotate, and the irregularly shaped stirring paddle and the spiral auger start to stir. The spiral auger tumbles the monochloroacetone from bottom to top, making the stirring effect better.

[0021] 3. This utility model uses a stirring shaft to drive the active pulley to rotate, and a belt drives the driven pulley and the rotating shaft. The rotating plate drives the drive column to push the connecting plate, causing the cooling cylinder to sway back and forth. Under the back and forth swaying of the cooling cylinder, as well as the stirring of the irregularly shaped stirring paddle and the spiral auger, the stirring is better, more uniform and comprehensive, thereby improving the uniformity and comprehensiveness of cooling and avoiding the occurrence of local overheating. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a rapid cooling device for monochloroacetone proposed in this utility model.

[0024] Figure 2 This is a cross-sectional view of the cooling box of a rapid cooling device for monochloroacetone proposed in this utility model.

[0025] Figure 3 This is a partial cross-sectional view of the cooling tank and cooling cylinder of a rapid cooling device for monochloroacetone proposed in this utility model.

[0026] Figure 4 for Figure 3 A schematic diagram of the structure of part A;

[0027] Figure 5 for Figure 3 A schematic diagram of the structure of part B.

[0028] In the diagram, 1. Cooling tank; 2. Feed pipe; 3. Pressure relief valve; 4. Temperature sensor; 5. High-efficiency stirring mechanism; 51. Servo motor; 52. Stirring shaft; 53. Belt; 54. Drive pulley; 55. Driven pulley; 56. Rotating shaft; 57. Rotating plate; 58. Connecting plate; 59. Drive column; 510. Irregularly shaped stirring paddle; 511. Spiral auger; 6. High-efficiency circulating cooling mechanism; 61. Water tank; 62. Heat exchanger; 64. Flow valve; 65. Upper hose; 66. Pump body; 67. Lower hose; 68. Annular cooling chamber; 69. Spiral guide vane; 7. Discharge pipe; 8. Cooling cylinder; 9. PLC controller. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] See Figure 1 — Figure 5 This utility model provides a rapid cooling device for monochloroacetone, including a cooling box 1, with a cooling cylinder 8 rotatably connected to the upper and lower inner walls of the cooling box 1. A high-efficiency circulating cooling mechanism 6 is provided between the cooling cylinder 8 and the cooling box 1. A discharge pipe 7 with a control valve is fixedly connected to the bottom of the cooling cylinder 8. A high-efficiency stirring mechanism 5 is provided between the cooling cylinder 8, the discharge pipe 7 and the cooling box 1. The high-efficiency stirring mechanism 5 includes a stirring and tumbling component and a forward and reverse shaking component. A PLC controller 9 with a display screen is fixedly connected to the front side of the cooling box 1. A feed pipe 2, a temperature sensor 4 and a pressure relief valve 3 are fixedly connected to the top of the cooling box 1.

[0031] Specifically, refer to Figures 1-3 The high-efficiency circulating cooling mechanism 6 includes a pump body 66, a heat exchanger 62, and a water tank 61, which are fixedly connected to one side of the cooling tank 1 from top to bottom, and an annular cooling cavity 68 fixedly sleeved on the outside of the cooling cylinder 8. The pump body 66, the heat exchanger 62, and the water tank 61 are connected from top to bottom. An upper hose 65 is fixedly connected between the top of the pump body 66 and the cooling cylinder 8. A flow valve 64 is installed on the upper hose 65. A lower hose 67 is fixedly connected between the water tank 61 and the cooling cylinder 8. Multiple heat dissipation fins 63 are fixedly connected to one side of the heat exchanger 62. A spiral guide vane 69 is fixedly sleeved inside the annular cooling cavity 68. The pump body 66, the flow valve 64, the heat exchanger 62, the pressure relief valve 3, and the temperature sensor 4 are all electrically connected to the PLC controller 9.

[0032] The above scheme is adopted as follows: Simultaneously, the pump body 66 starts, and the chilled brine in the water tank 61 is transported to the annular cooling chamber 68. After being guided by the spiral guide vane 69, it flows back to the water tank through the lower hose 67, and then is cooled by the heat exchanger 62 before being recycled. The heat exchange fins 63 greatly improve the heat exchange and cooling effect of the heat exchanger 62. Due to the setting of the upper and lower hoses, it does not hinder the slight forward and reverse swaying of the cooling cylinder 8. Guided by the spiral guide vane 69, the cooling medium can be guided to flow along the spiral path, avoiding medium short circuit, extending the heat exchange time, and improving the heat exchange efficiency.

[0033] Specifically, an inlet valve and an outlet valve are fixedly connected to one side of the water tank 61 from top to bottom, which facilitates the regular replacement of the chilled brine in the water tank 61.

[0034] Specifically, refer to Figures 1-5The stirring and churning assembly includes a servo motor 51 fixedly mounted on the top of the cooling tank 1. A stirring shaft 52 is fixedly connected to the output shaft of the servo motor 51. Three irregularly shaped stirring paddles 510 are fixedly connected to the outside of the stirring shaft 52. A spiral auger 511 is fixedly sleeved on the outside of the stirring shaft 52 below the irregularly shaped stirring paddles 510. The forward and reverse shaking assembly includes a connecting plate 58 fixedly connected to one side of the cooling cylinder 8, a drive pulley 54 rotatably sleeved on the outside of the stirring shaft 52, and a rotating shaft 56 rotatably connected to the top of the cooling tank 1. A driven pulley 55 is fixedly connected to the top of the rotating shaft 56. The drive pulley 54 and the driven pulley 55 are connected to the same belt 53. A rotating plate 57 is fixedly connected to the bottom of the rotating shaft 56. A drive column 59 is fixedly connected to the bottom of the rotating plate 57. An elongated hole is opened on the top of the connecting plate 58, and the drive column 59 is slidably sleeved in the elongated hole.

[0035] The above scheme is adopted: the servo motor 51 drives the stirring shaft 52 to rotate, and the irregularly shaped stirring paddle 510 and the spiral auger 511 start to stir. The spiral auger 511 tumbles the monochloroacetone from bottom to top, making the stirring effect better. The stirring shaft 52 drives the drive pulley 54 to rotate, and the belt 53 drives the driven pulley 55 and the rotating shaft 56. The rotating plate 57 drives the drive column 59 to push the connecting plate 58, making the cooling cylinder 8 swing back and forth. Under the back and forth swing of the cooling cylinder 8, and the stirring of the irregularly shaped stirring paddle 510 and the spiral auger 511, the stirring is better, more uniform and comprehensive, thereby improving the uniformity and comprehensiveness of cooling and avoiding the occurrence of local overheating.

[0036] Specifically, the auger 511 is located inside the discharge pipe 7. During discharge, the auger 511 can be rotated in the opposite direction to facilitate the smooth discharge of monochloroacetone.

[0037] Specifically, a mounting bracket is fixedly connected to the top of the cooling box 1, and the servo motor 51 is fixedly connected to the top of the mounting bracket, which facilitates the support and fixation of the servo motor 51.

[0038] Specifically, the cooling cylinder 8 and the discharge pipe 7 are rotatably connected between the upper and lower inner walls of the cooling box 1 via bearings, which improves the smoothness and stability of the rotation of the cooling cylinder 8.

[0039] In this invention, the inlet valve of water tank 61 is opened, and chilled brine is injected into water tank 61. The target cooling temperature of monochloroacetone (25-30℃), the initial speed of pump body 66, the initial speed of servo motor 51, and the opening pressure threshold of pressure relief valve 3 are set via the display screen of PLC controller 9. The sealing cap of feed pipe 2 at the top of cooling cylinder 8 is opened, and monochloroacetone at approximately 100℃ is injected into cooling cylinder 8 through feed pipe 2. Then, the threaded sealing cap is tightened. The device is started via PLC controller 9, and servo motor 51 drives stirring shaft 52 to rotate. The irregularly shaped stirring paddle 510 and spiral auger 511 begin stirring. Spiral auger 511 churns monochloroacetone from bottom to top, causing... The stirring effect is better. At the same time, the pump body 66 starts and delivers the chilled brine in the water tank 61 to the annular cooling chamber 68. After being guided by the spiral guide vane 69, it flows back to the water tank through the lower hose 67. After being cooled by the heat exchanger 62, it is recycled. At the same time, the stirring shaft 52 drives the drive pulley 54 to rotate, which drives the driven pulley 55 and the rotating shaft 56 through the belt 53. The rotating plate 57 drives the drive column 59 to push the connecting plate 58, so that the cooling cylinder 8 swings back and forth along the bearing. Under the back and forth swing of the cooling cylinder 8, and under the stirring of the irregular stirring paddle 510 and the spiral auger 511, the stirring is better, more uniform and comprehensive, thereby improving the uniformity and comprehensiveness of cooling and avoiding the occurrence of local overheating.

[0040] Temperature sensor 4 collects the temperature of monochloroacetone inside cooling cylinder 8 in real time, and the data is simultaneously displayed on the screen of PLC controller 9. If the temperature is >30℃, PLC controller 9 automatically increases the speed of pump body 66, the opening of flow valve 64, and the speed of servo motor 51 to accelerate cooling efficiency. If the temperature is <25℃, PLC controller 9 reduces the speed of pump body 66, the opening of flow valve 64, and the speed of servo motor 51 to avoid overcooling. If the pressure inside the cooling cylinder is greater than the preset value, the pressure relief valve 3 is equipped with a pressure sensor to measure the air pressure inside cooling cylinder 8 so that PLC controller 9 can automatically open... Open the pressure relief valve 3 to introduce the volatilized monochloroacetone gas into the external exhaust gas treatment device. When the display screen of PLC controller 9 shows that the monochloroacetone temperature is stable at 25-30℃ for 5 minutes, the cooling is determined to be complete. The PLC controller 9 shuts down the servo motor 51, pump body 66 and heat exchanger 62, opens the control valve of the discharge pipe 7, and starts the servo motor 51 in reverse. At this time, under the push of the reverse rotating screw conveyor 511, the material is smoothly discharged from the discharge pipe 7. After the discharge is completed, close the discharge pipe control valve, open the water outlet valve of water tank 61 to discharge the aged frozen brine, and then inject new frozen brine to prepare for the cooling of the next batch of materials.

Claims

1. A rapid cooling device for monochloroacetone, characterized in that, The cooling tank (1) is rotatably connected to the same cooling cylinder (8) on its upper and lower inner walls. A high-efficiency circulating cooling mechanism (6) is provided between the cooling cylinder (8) and the cooling tank (1). A discharge pipe (7) with a control valve is fixedly connected to the bottom of the cooling cylinder (8). A high-efficiency stirring mechanism (5) is provided between the cooling cylinder (8), the discharge pipe (7) and the cooling tank (1). The high-efficiency stirring mechanism (5) includes a stirring and tumbling component and a forward and reverse shaking component. A PLC controller (9) with a display screen is fixedly connected to the front side of the cooling tank (1). A feed pipe (2), a temperature sensor (4) and a pressure relief valve (3) are fixedly connected to the top of the cooling tank (1).

2. The rapid cooling device for monochloroacetone according to claim 1, characterized in that: The high-efficiency circulating cooling mechanism (6) includes a pump body (66), a heat exchanger (62) and a water tank (61) fixedly connected from top to bottom to one side of the cooling box (1), and an annular cooling cavity (68) fixedly sleeved on the outside of the cooling cylinder (8). The pump body (66), the heat exchanger (62) and the water tank (61) are connected from top to bottom. An upper hose (65) is fixedly connected between the top of the pump body (66) and the cooling cylinder (8). A flow valve (64) is provided on the upper hose (65). A lower hose (67) is fixedly connected between the water tank (61) and the cooling cylinder (8). Multiple heat dissipation fins (63) are fixedly connected to one side of the heat exchanger (62).

3. The rapid cooling device for monochloroacetone according to claim 2, characterized in that: The annular cooling cavity (68) is fitted with a spiral guide vane (69).

4. A rapid cooling device for monochloroacetone according to claim 2, characterized in that: The water tank (61) has an inlet valve and an outlet valve fixedly connected to one side from top to bottom.

5. A rapid cooling device for monochloroacetone according to claim 2, characterized in that: The pump body (66), flow valve (64), heat exchanger (62), pressure relief valve (3) and temperature sensor (4) are all electrically connected to the PLC controller (9).

6. The rapid cooling device for monochloroacetone according to claim 1, characterized in that: The stirring and tumbling assembly includes a servo motor (51) fixedly installed on the top of the cooling box (1). A stirring shaft (52) is fixedly connected to the output shaft of the servo motor (51). Three irregular stirring paddles (510) are fixedly connected to the outside of the stirring shaft (52). A spiral auger (511) is fixedly sleeved on the outside of the stirring shaft (52) below the irregular stirring paddles (510).

7. A rapid cooling device for monochloroacetone according to claim 6, characterized in that: The spiral auger (511) is located inside the discharge pipe (7).

8. A rapid cooling device for monochloroacetone according to claim 6, characterized in that: The top of the cooling box (1) is fixedly connected to a mounting bracket, and the servo motor (51) is fixedly connected to the top of the mounting bracket.

9. A rapid cooling device for monochloroacetone according to claim 6, characterized in that: The forward and reverse swaying assembly includes a connecting plate (58) fixedly connected to one side of the cooling cylinder (8), a drive pulley (54) rotatably sleeved on the outside of the stirring shaft (52), and a rotating shaft (56) rotatably connected to the top of the cooling box (1). A driven pulley (55) is fixedly connected to the top of the rotating shaft (56). The drive pulley (54) and the driven pulley (55) are connected to the same belt (53). A rotating plate (57) is fixedly connected to the bottom of the rotating shaft (56). A drive column (59) is fixedly connected to the bottom of the rotating plate (57). An elongated hole is opened at the top of the connecting plate (58), and the drive column (59) is slidably sleeved in the elongated hole.

10. A rapid cooling device for monochloroacetone according to claim 1, characterized in that: The cooling cylinder (8) and the discharge pipe (7) are rotatably connected between the upper and lower inner walls of the cooling box (1) via bearings.

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