Distillation and purification device for preparing trimethylpentanediol

Abstract

The distillation and purification device comprises a distillation tower, a condenser and a receiver, the condenser is installed at the top of the distillation tower, the receiver is connected with the condenser, the left side of the distillation tower is connected with a pretreatment box, progressive grooves are formed in the pretreatment box at equal intervals, and the progressive grooves are connected with the receiver. The top of the pretreatment box is fixedly connected with a feeding hopper communicating with the interior of the pretreatment box. The steam discharged by the distillation tower is used for preheating raw materials, the heat can be recycled, the energy consumption is reduced, the heat efficiency of the whole distillation process is improved, the raw materials are mixed by stirring, the uniform heating of the raw materials in the pretreatment box can be ensured, and local overheating or supercooling is avoided; the device is simple in structure and convenient to operate, distillation uniformity and efficiency can be improved, turbulent flow in the raw materials can be increased through stirring, the mixing and mass transfer process of the raw materials is promoted, and trimethyl pentanediol can be better separated and purified.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation purification, in particular to a distillation purification device for preparing trimethylpentanediol. Background Art

[0002] Trimethylpentanediol is an important chemical raw material, widely used in the manufacture of polyurethane, alkyd resin, lubricant additives, etc. In the preparation process, distillation purification is a key step to improve the purity and quality of the product.

[0003] In the distillation process of trimethylpentanediol, components such as distillation towers, distillation kettles, condensers and receivers are required to achieve distillation and purification of the mixture. If the mixture is not pretreated before entering the distillation kettle, the quality of distillation and purification is easily affected by local overheating or overcooling, and scale is easily attached to the inner wall of the distillation kettle. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a distillation and purification device for preparing trimethylpentanediol to solve the background technical problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A distillation and purification device for preparing trimethylpentanediol comprises a distillation tower, a condenser and a receiver, wherein the condenser is installed on the top of the distillation tower, the receiver is connected to the condenser, a pretreatment box is connected to the left side of the distillation tower, the interior of the pretreatment box is provided with equidistantly arranged progressive grooves, a feed hopper connected to the interior of the pretreatment box is fixedly connected to the top of the pretreatment box, two synchronous plates are rotatably connected to the inner wall of the progressive groove, a hollow tube is fixedly connected to the synchronous plate, a uniformly distributed guide plate is fixedly connected to the hollow tube, the interior of the guide plate is connected to the interior of the hollow tube, air pipes are rotatably connected to both sides of the hollow tube, the air pipe on the right side can be connected to an exhaust pipe on the distillation tower, the interior of the air pipe is connected to the hollow tube and extends to the outside of the pretreatment box, and a transmission component is arranged outside the pretreatment box.

[0007] As a further description of the above technical solution: the transmission assembly includes a drive motor, the drive motor is fixedly installed on the side of the pretreatment box, the output shaft of the drive motor is fixedly connected to a transmission gear, the outer side of the synchronization plate is fixedly connected to an outer gear ring, the two adjacent outer gear rings are meshed with each other, and the outer gear ring at the bottom is meshed with the transmission gear.

[0008] As a further description of the above technical solution: the synchronous plate and the inner wall of the progressive groove are subjected to a rotational sealing treatment.

[0009] As a further description of the above technical solution: the side of the guide plate is in contact with the inner wall of the progressive groove, and the guide plate is made of stainless steel.

[0010] As a further description of the above technical solution: the bottom of the pretreatment box is detachably connected to a transfer box, the right side of the transfer box is fixedly installed with a liquid pump, and the liquid pump is connected to the distillation tower through a pipeline.

[0011] As a further description of the above technical solution: the bottom of the transfer box is conical, and the inner wall of the transfer box is smooth.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] In the utility model, the steam discharged from the distillation tower is used to preheat the raw materials, and this part of the heat can be recycled and utilized, thereby reducing energy consumption and improving the thermal efficiency of the entire distillation process. The raw materials are mixed by stirring, which can ensure that the raw materials are evenly heated in the pretreatment box, avoiding local overheating or overcooling, and helping to improve the uniformity and efficiency of the distillation. Stirring can increase the turbulence inside the raw materials, promote the mixing and mass transfer process of the raw materials, and help to better separate and purify trimethylpentanediol. During the distillation process, impure substances in the raw materials may scale on the heating surface. Preheating and stirring can reduce the occurrence of this situation and extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the pretreatment box of the utility model;

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the side cross-sectional structure of the pretreatment box of the utility model;

[0017] Figure 4 For the utility model Figure 3 Enlarged structural diagram at A in the middle.

[0018] Description of the numbers in the figure:

[0019] 1. Distillation tower; 2. Condenser; 3. Receiver; 4. Pretreatment box; 5. Progressive trough; 6. Feed hopper; 7. Synchronous plate; 8. Hollow tube; 9. Drainage plate; 10. Air pipe; 11. Transmission assembly; 1101. Drive motor; 1102. Transmission gear; 1103. External gear ring; 12. Transfer box; 13. Liquid pump. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] See also Figure 1-4 In the utility model, a distillation and purification device for preparing trimethylpentanediol comprises a distillation tower 1, a condenser 2 and a receiver 3. The condenser 2 is installed on the top of the distillation tower 1, and the receiver 3 is connected to the condenser 2. A pretreatment box 4 is connected to the left side of the distillation tower 1. The interior of the pretreatment box 4 is provided with progressive grooves 5 arranged at equal distances. A feed hopper 6 connected to the interior of the pretreatment box 4 is fixedly connected to the top of the pretreatment box 4. Two synchronous plates 7 are rotatably connected to the inner wall of the progressive groove 5. A hollow tube 8 is fixedly connected to the synchronous plate 7. A uniformly distributed guide plate 9 is fixedly connected to the hollow tube 8. The interior of the guide plate 9 is connected to the interior of the hollow tube 8. Both sides of the hollow tube 8 are rotatably connected with an air pipe 10. The air pipe 10 on the right side can be connected to the exhaust pipe on the distillation tower 1. The interior of the air pipe 10 is connected to the hollow tube 8 and extends to the outside of the pretreatment box 4. A transmission component 11 is arranged on the outside of the pretreatment box 4.

[0022] The transmission assembly 11 includes a driving motor 1101, which is fixedly installed on the side of the pretreatment box 4. A transmission gear 1102 is fixedly connected to the output shaft of the driving motor 1101. An outer gear ring 1103 is fixedly connected to the outer side of the synchronous plate 7. Two adjacent outer gear rings 1103 are meshed with each other, and the outer gear ring 1103 at the bottom is meshed with the driving gear 1102. The synchronous plate 7 and the inner wall of the progressive groove 5 are rotationally sealed. The bottom of the pretreatment box 4 is detachably connected to the transfer box 12, and a liquid pump 13 is fixedly installed on the right side of the transfer box 12. The liquid pump 13 is connected to the distillation tower 1 through a pipeline.

[0023] The bottom of the distillation tower 1 includes a still. When it is necessary to distill and purify trimethylpentanediol, the user adds the trimethylpentanediol mixture through the feed hopper 6 on the top of the pretreatment box 4, and then the trimethylpentanediol mixture moves downward into the progressive groove 5. At this time, the transmission component 11 keeps operating, and the driving motor 1101 drives the transmission gear 1102 fixedly connected thereto to rotate, and the transmission gear 1102 drives the top outer gear ring 1103 to rotate synchronously. The top multiple groups of outer gear rings 1103 are meshed with each other, so that the multiple groups of outer gear rings 1103 rotate synchronously and in different directions, and the synchronous plate 7 and the hollow tube 8 on the synchronous plate 7 rotate accordingly, thereby causing the multiple groups of guide plates 9 fixedly connected to the hollow tube 8 to move downward accordingly, and the trimethylpentanediol mixture moves downward and is blocked by the guide plate 9 and moves inside the progressive groove 5 with the guide plate 9, thereby achieving stirring and mixing of the mixture, and the downward moving trimethylpentanediol mixture will be pushed by the guide plates 9 with different rotation directions after entering the bottom progressive groove 5. , thereby changing the motion trajectory and improving the mixing efficiency. In the above mixing process, the hollow tube 8 and the guide plate 9 are both in a hollow state. Steam can be sent into the multiple groups of guide plates 9 through the side air pipe 10. The steam can be used as the steam discharged from the distillation tower 1, so that during the stirring and mixing process, the guide plate 9 and the trimethylpentanediol mixture are heat exchanged to complete preheating until the trimethylpentanediol mixture enters the transfer box 12, and then the trimethylpentanediol mixture in the transfer box 12 is sent into the distillation tower 1 through the liquid pump 13. The distillation tower 1 is the core equipment for separating the mixture. The raw material enters from the bottom of the distillation tower 1 and is partially evaporated by heating. The inside of the distillation tower 1 is usually filled with fillers or provided with tower plates to provide a place for gas-liquid contact and promote the separation of the mixture. The condenser 2 is located at the top of the distillation tower 1, and is used to condense the rising steam into liquid. The condenser 2 cools the steam through a cooling medium to condense it into liquid, and then collects liquids with different boiling points through multiple groups of receivers 3.

[0024] In the utility model, the steam discharged from the distillation tower 1 is used to preheat the raw materials, and this part of the heat can be recycled and utilized, thereby reducing energy consumption and improving the thermal efficiency of the entire distillation process. The raw materials are mixed by stirring, which can ensure that the raw materials are evenly heated in the pretreatment box 4, avoiding local overheating or overcooling, and helping to improve the uniformity and efficiency of the distillation. Stirring can increase the turbulence inside the raw materials, promote the mixing and mass transfer process of the raw materials, and help to better separate and purify trimethylpentanediol. During the distillation process, impure substances in the raw materials may scale on the heating surface. Preheating and stirring can reduce the occurrence of this situation and extend the service life of the equipment.

[0025] See also Figure 3 , wherein: the side of the guide plate 9 is in contact with the inner wall of the progressive groove 5, and the guide plate 9 is made of stainless steel.

[0026] In the utility model, the drainage plate 9 made of stainless steel has good corrosion resistance and thermal conductivity, is suitable for the preparation of trimethylpentanediol, and has high strength to adapt to continuous work. The fitting of the rotating drainage plate 9 and the inner wall of the progressive groove 5 can better transport the mixture.

[0027] See also Figure 3 , wherein: the bottom of the transfer box 12 is conical, and the inner wall of the transfer box 12 is smooth.

[0028] In the utility model, the transfer box 12 with an inclined inner wall is convenient for the liquid pump 13 to extract the mixture, and the smooth inner wall can also be convenient for cleaning and flushing to prevent adhesion.

[0029] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A distillation and purification device for preparing trimethylpentanediol, comprising a distillation tower (1), a condenser (2) and a receiver (3), wherein the condenser (2) is installed at the top of the distillation tower (1), and the receiver (3) is connected to the condenser (2), characterized in that: The left side of the distillation tower (1) is connected to a pretreatment box (4), the interior of the pretreatment box (4) is provided with progressive grooves (5) arranged at equal distances, the top of the pretreatment box (4) is fixedly connected to a feed hopper (6) connected to the interior thereof, the inner wall of the progressive groove (5) is rotatably connected to two synchronous plates (7), the synchronous plates (7) are fixedly connected to a hollow tube (8), the hollow tube (8) is fixedly connected to a uniformly distributed guide plate (9), the interior of the guide plate (9) is connected to the interior of the hollow tube (8), both sides of the hollow tube (8) are rotatably connected to an air pipe (10), the air pipe (10) on the right side can be connected to an exhaust pipe on the distillation tower (1), the interior of the air pipe (10) is connected to the hollow tube (8) and extends to the outside of the pretreatment box (4), and a transmission component (11) is arranged outside the pretreatment box (4).

2. A distillation and purification device for preparing trimethylpentanediol according to claim 1, characterized in that: The transmission assembly (11) comprises a driving motor (1101), wherein the driving motor (1101) is fixedly mounted on the side of the pretreatment box (4), a transmission gear (1102) is fixedly connected to the output shaft of the driving motor (1101), an outer gear ring (1103) is fixedly connected to the outer side of the synchronization plate (7), two adjacent outer gear rings (1103) are meshed with each other, and the outer gear ring (1103) at the bottom is meshed with the transmission gear (1102).

3. A distillation and purification device for preparing trimethylpentanediol according to claim 1, characterized in that: The synchronous plate (7) and the inner wall of the progressive groove (5) are subjected to a rotational sealing treatment.

4. A distillation and purification device for preparing trimethylpentanediol according to claim 1, characterized in that: The side of the guide plate (9) is in contact with the inner wall of the progressive groove (5), and the guide plate (9) is made of stainless steel.

5. A distillation and purification device for preparing trimethylpentanediol according to claim 1, characterized in that: The bottom of the pretreatment box (4) is detachably connected to a transfer box (12), and a liquid extraction pump (13) is fixedly installed on the right side of the transfer box (12), and the liquid extraction pump (13) is connected to the distillation tower (1) through a pipeline.

6. A distillation and purification device for preparing trimethylpentanediol according to claim 5, characterized in that: The bottom of the transfer box (12) is conical, and the inner wall of the transfer box (12) is smooth.

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