Cooling device for preparing p-hydroxybenzonitrile

Abstract

The utility model discloses a cooling device for preparing p-hydroxybenzonitrile, which comprises a cooling cylinder and a discharge pipe connected to the bottom end of the cooling cylinder, a feed port is arranged at the top of the cooling cylinder, and a cooling mechanism for cooling materials is connected in the cooling cylinder. The cooling mechanism comprises a heat dissipation disc, a plurality of upper sprayers, a plurality of lower sprayers, an outer pipe, a cooling pipe and an inner pipe, the heat dissipation disc is connected to the top of the outer pipe, the upper sprayers and the lower sprayers are communicated with the cooling pipe, the cooling pipe is wound on the outer side of the inner pipe, the air spraying direction of the upper sprayers faces the heat dissipation disc, the cooling pipe is connected with an external air supply mechanism, and the air supply mechanism is connected with the cooling mechanism. The inner pipe is connected with a conveying mechanism used for conveying materials. According to the device, materials can be turned over continuously, cooling and heat dissipation of the materials are facilitated, the air injection direction of the upper spray head faces the heat dissipation disc, the heat dissipation disc is used in cooperation, the lower spray head blows air in the material falling process, and the heat dissipation efficiency of the materials is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of p-hydroxybenzonitrile preparation, in particular to a cooling device for p-hydroxybenzonitrile preparation. Background Art

[0002] p-Hydroxybenzonitrile (p-Hydroxybenzonitrile) is a chemical with the molecular formula C7H5NO. Also known as 4-hydroxybenzonitrile and p-cyanophenol, the pure product appears as lustrous, scaly white crystals with an mp of 112-113°C and a bp of 145°C / 266.6Pa. It is soluble in a variety of organic solvents and readily soluble in hot water. It is an important fine chemical raw material and intermediate, widely used in the synthesis of various pharmaceuticals, fragrances, pesticides, liquid crystal materials, and corrosion inhibitors.

[0003] During the preparation of p-hydroxybenzonitrile, cooling is required. Usually, the material is piled in a cooling drum and stirred by a stirring mechanism for natural cooling. This method takes a long time to cool and is inefficient, which in turn affects the subsequent processing of the material and has poor practicality. Utility Model Content

[0004] The purpose of the utility model is to provide a cooling device for the preparation of p-hydroxybenzonitrile, which has the advantages of being able to continuously turn over the material, being beneficial to the cooling and heat dissipation of the material, and being able to accelerate the heat dissipation efficiency of the material by cooperating with the use of a cooling mechanism, thereby solving the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a cooling device for preparing parahydroxybenzonitrile, comprising a cooling cylinder and a discharge pipe connected to the bottom end of the cooling cylinder, and a feeding port is provided at the top of the cooling cylinder, a cooling mechanism for cooling the material is connected to the cooling cylinder, the cooling mechanism comprises a heat dissipation plate, multiple upper nozzles, multiple lower nozzles, an outer tube, a cooling pipe, and an inner tube, the heat dissipation plate is connected to the top of the outer tube, the upper nozzle and the lower nozzle are connected to the cooling pipe, the cooling pipe is wound around the outside of the inner tube, the jet direction of the upper nozzle is toward the heat dissipation plate, the cooling pipe is connected to an external air supply mechanism, and the inner tube is connected to a conveying mechanism for material conveying.

[0006] Preferably, the cooling mechanism further includes an installation cavity and a plurality of heat dissipation holes, the installation cavity is arranged between the outer tube and the inner tube, the cooling tube is located in the installation cavity, and the heat dissipation holes are arranged on the heat dissipation plate.

[0007] Preferably, the heat dissipation plate is an umbrella-shaped structure.

[0008] Preferably, the upper nozzle and the lower nozzle are connected to the outside of the outer tube, the upper nozzle is located above the lower nozzle, and the upper nozzle is arranged obliquely, while the lower nozzle is arranged horizontally.

[0009] Preferably, the conveying mechanism includes a motor, a rotating shaft, and a spiral conveying shaft. The motor is used to drive the rotating shaft to rotate. The end of the rotating shaft is connected to the spiral conveying shaft, and the spiral conveying shaft passes through the inner tube.

[0010] Preferably, a transverse plate is connected to the top of the cooling cylinder, the motor is fixed to the top of the transverse plate, and the rotating shaft is rotatably connected to the transverse plate.

[0011] Preferably, the center line of the spiral conveying shaft coincides with the axis of the inner tube, and both ends of the spiral conveying shaft protrude from both ends of the inner tube.

[0012] Preferably, the bottom of the outer tube is connected to a support frame, and the support frame is fixed to the inner bottom end of the cooling cylinder.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is provided with a cooling mechanism and a conveying mechanism, and the motor can drive the spiral conveying shaft to rotate, so that the material at the bottom end of the cooling cylinder enters through the inner tube and is discharged from the top of the inner tube. The heat dissipation plate disperses the material, and then the material falls to the bottom end of the cooling cylinder again, realizing continuous flipping of the material, which is beneficial to the cooling and heat dissipation of the material. At the same time, during the rising process of the material, the cooling tube absorbs heat from the inner tube to realize the material cooling operation. Furthermore, cold air is ejected from the upper nozzle and the lower nozzle, and the jet direction of the upper nozzle is toward the heat dissipation plate. Combined with the use of the heat dissipation plate and the blowing of air by the lower nozzle during the falling process of the material, the heat dissipation efficiency of the material is accelerated, and the practicality is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure between the heat sink and the motor of the utility model;

[0017] Figure 4 This is a schematic diagram of the connection structure between the cooling mechanism and the conveying mechanism of the present invention.

[0018] In the figure: 1. Cooling cylinder; 2. Horizontal plate; 3. Motor; 4. Rotating shaft; 5. Discharge pipe; 6. Cold air delivery pipe; 7. Screw conveyor shaft; 8. Heat dissipation plate; 9. Upper nozzle; 10. Lower nozzle; 11. Outer tube; 12. Cooling tube; 13. Inner tube; 14. Mounting cavity; 15. Support frame; 16. Heat dissipation hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0020] See also Figures 1 to 4 The present invention provides a cooling device for preparing parahydroxybenzonitrile, comprising a cooling cylinder 1 and a discharge pipe 5 connected to the bottom end of the cooling cylinder 1. A feeding port is provided at the top of the cooling cylinder 1. The material enters the cooling cylinder 1 from the feeding port for cooling. The discharge pipe 5 is connected to a solenoid valve. During the material cooling process, the solenoid valve is in a closed state to prevent the material from being discharged from the discharge pipe 5. When the material is cooled to a suitable temperature, the solenoid valve opens to discharge the material. A cooling mechanism for cooling the material is connected to the cooling cylinder 1. The cooling mechanism comprises a heat sink 8, multiple upper nozzles 9, multiple lower nozzles 10, an outer tube 11, a cooling pipe 12, and an inner tube 13. The heat sink 8 is connected to the top of the outer tube 11. The upper nozzles 9 and the lower nozzles 10 are connected to the cooling pipe 12. The cooling pipe 12 is wound around the outside of the inner tube 13. The jet direction of the upper nozzle 9 is toward the heat sink 8. The cooling pipe 12 is connected to an external air supply mechanism (belonging to the existing technology). The inner tube 13 is connected to a conveying mechanism for material conveying. When the material moves upward and is discharged from the top of the inner tube 13, the heat sink 8 disperses the material, and the upper nozzle 9 blows air to the heat sink 8 to facilitate cooling of the material. Then the material falls from the edge of the heat sink 8. During the falling process, the horizontal lower nozzle 10 blows air to the material again to further improve the heat dissipation effect of the material.

[0021] As the material moves upward, the cooling tube 12 absorbs heat from the inner tube 13, keeping it at a low temperature and cooling the material. Furthermore, cold air is ejected from the upper nozzle 9 and the lower nozzle 10, with the upper nozzle 9 directing its jet toward the heat sink 8. Combined with the use of the heat sink 8 and the lower nozzle 10 blowing air onto the material as it falls, this accelerates the material's heat dissipation efficiency and shortens its cooling time.

[0022] The cooling mechanism also includes an installation cavity 14 and multiple heat dissipation holes 16. The installation cavity 14 is arranged between the outer tube 11 and the inner tube 13. The cooling tube 12 is located in the installation cavity 14. The heat dissipation holes 16 are arranged on the heat dissipation plate 8. The heat dissipation plate 8 is an umbrella-shaped structure, which can promote wind cooling and enhance the cooling effect.

[0023] The upper nozzle 9 and the lower nozzle 10 are connected to the outside of the outer tube 11. The upper nozzle 9 is located above the lower nozzle 10, and the upper nozzle 9 is tilted and the lower nozzle 10 is horizontally set. The end of the cooling pipe 12 is connected to the cold air delivery pipe 6, and the cold air delivery pipe 6 is connected to the external air supply mechanism. The cold air is delivered to the cooling pipe 12 through the cold air delivery pipe 6, and the cooling pipe 12 is spirally wound around the outside of the inner tube 13, so that the inner tube 13 is cooled evenly, which is convenient for cooling the material.

[0024] The conveying mechanism includes a motor 3, a rotating shaft 4, and a screw conveying shaft 7. The motor 3 is used to drive the rotating shaft 4 to rotate. The end of the rotating shaft 4 is connected to the screw conveying shaft 7, and the screw conveying shaft 7 runs through the inner tube 13. The motor 3 drives the rotating shaft 4 to rotate, and synchronously drives the screw conveying shaft 7 to rotate, facilitating the entry of material at the bottom end of the cooling cylinder 1 through the inner tube 13 and discharge from the top of the inner tube 13, achieving continuous flipping of the material, which is beneficial to cooling and heat dissipation of the material.

[0025] The top of the cooling cylinder 1 is connected to a transverse plate 2 , a motor 3 is fixed to the top of the transverse plate 2 , and a rotating shaft 4 is rotatably connected to the transverse plate 2 , thereby improving the stability of the rotation of the rotating shaft 4 and making the screw conveying shaft 7 rotate stably.

[0026] The center line of the screw conveying shaft 7 coincides with the axis of the inner tube 13 , and both ends of the screw conveying shaft 7 protrude from both ends of the inner tube 13 .

[0027] The bottom of the outer tube 11 is connected to a support frame 15 , which is fixed to the inner bottom end of the cooling cylinder 1 to provide good support for the outer tube 11 .

[0028] Working principle: The material is fed into the cooling cylinder 1 from the feeding port, and the cold air enters the cooling tube 12 through the cold air conveying pipe 6. The cooling tube 12 cools the inner tube 13. At the same time, part of the cold air is discharged from the upper nozzle 9 and the lower nozzle 10. Furthermore, the motor 3 drives the rotating shaft 4 to rotate, and synchronously drives the spiral conveying shaft 7 to rotate. The material enters from the bottom of the inner tube 13, moves up along the height direction of the inner tube 13, and is discharged from the top outlet. During the upward movement of the material, the inner tube 13 cools the material. The heat dissipation plate 8 disperses the material, and the upper nozzle 9 blows air on the heat dissipation plate 8 to promote the cooling effect of the material. Then the material falls from the edge of the heat dissipation plate 8, and the lower nozzle 10 blows air on the falling material again to cool it down, thereby improving the cooling efficiency of the material. When the material is cooled to a suitable temperature, it is immediately discharged from the discharge pipe 5.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling device for preparing p-hydroxybenzonitrile, comprising a cooling cylinder (1) and a discharge pipe (5) connected to the bottom end of the cooling cylinder (1), wherein a feeding port is provided at the top of the cooling cylinder (1), characterized in that: The cooling cylinder (1) is internally connected to a cooling mechanism for cooling materials, and the cooling mechanism includes a heat sink (8), a plurality of upper nozzles (9), a plurality of lower nozzles (10), an outer tube (11), a cooling tube (12), and an inner tube (13). The heat sink (8) is connected to the top of the outer tube (11), the upper nozzles (9) and the lower nozzles (10) are connected to the cooling tube (12), the cooling tube (12) is wound around the outside of the inner tube (13), the jet direction of the upper nozzle (9) is toward the heat sink (8), the cooling tube (12) is connected to an external air supply mechanism, and the inner tube (13) is connected to a conveying mechanism for conveying materials.

2. A cooling device for preparing p-hydroxybenzonitrile according to claim 1, characterized in that, The cooling mechanism further comprises a mounting cavity (14) and a plurality of heat dissipation holes (16); the mounting cavity (14) is arranged between the outer tube (11) and the inner tube (13); the cooling tube (12) is located in the mounting cavity (14); and the heat dissipation holes (16) are arranged on the heat dissipation plate (8).

3. A cooling device for preparing p-hydroxybenzonitrile according to claim 2, characterized in that, The heat dissipation plate (8) is an umbrella-shaped structure.

4. A cooling device for preparing p-hydroxybenzonitrile according to claim 1, characterized in that: The upper nozzle (9) and the lower nozzle (10) are connected to the outside of the outer tube (11), the upper nozzle (9) is located above the lower nozzle (10), and the upper nozzle (9) is arranged at an angle, while the lower nozzle (10) is arranged horizontally.

5. A cooling device for preparing p-hydroxybenzonitrile according to claim 1, characterized in that: The conveying mechanism comprises a motor (3), a rotating shaft (4), and a spiral conveying shaft (7). The motor (3) is used to drive the rotating shaft (4) to rotate. The end of the rotating shaft (4) is connected to the spiral conveying shaft (7). The spiral conveying shaft (7) passes through the inner tube (13).

6. A cooling device for preparing p-hydroxybenzonitrile according to claim 5, characterized in that: The top of the cooling cylinder (1) is connected to a transverse plate (2), the motor (3) is fixed to the top of the transverse plate (2), and the rotating shaft (4) is rotatably connected to the transverse plate (2).

7. A cooling device for preparing p-hydroxybenzonitrile according to claim 5, characterized in that: The center line of the spiral conveying shaft (7) coincides with the axis of the inner tube (13), and both ends of the spiral conveying shaft (7) protrude from both ends of the inner tube (13).

8. A cooling device for preparing p-hydroxybenzonitrile according to claim 1, characterized in that: The bottom of the outer tube (11) is connected to a support frame (15), and the support frame (15) is fixed to the inner bottom end of the cooling cylinder (1).

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