Purification equipment for producing 3, 4-dimethyl benzaldehyde

Abstract

The utility model belongs to the technical field of purification equipment, and discloses purification equipment for producing 3, 4-dimethyl benzaldehyde, which comprises a rectifying tower and a condenser, a coaxial condensing pipe is movably mounted in the middle of the condenser, two ends of the condensing pipe penetrate through the condenser and extend to the outside of the condenser, and the rectifying tower is connected with the condensing pipe. A feeding mechanism is connected between the condenser and the condensation pipe in a sleeving manner; the feeding mechanism comprises a flow guide driving assembly fixedly connected to one end of the condensation pipe in a sleeved mode, the flow guide driving assembly is composed of a flow guide ring, a feeding port, a discharging port, a transmission sleeve and a plurality of evenly-distributed impellers, and the transmission sleeve is coaxially arranged in the flow guide ring in a sleeved mode. Due to the arrangement of the feeding mechanism, the condensation pipe in the condenser can rotate quickly, so that the condensation pipe can be in contact with high-temperature airflow at any position in the condenser in time, the high-temperature airflow entering the condenser can exchange heat with the condensation pipe quickly, and the condensation efficiency is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of purification equipment, in particular to purification equipment used for the production of 3,4-dimethylbenzaldehyde. Background Art

[0002] 3,4-Dimethylbenzaldehyde is a colorless or light yellow transparent liquid with an almond flavor. It is a new fine chemical intermediate that plays an important role in fine organic synthesis. It is widely used in the synthesis of fine chemicals such as medicines, pesticides, fragrances, beverages, and foods, such as viscosity regulators, coagulants for organic pollutants, and curing agents for pharmaceuticals and cosmetics.

[0003] When 3,4-dimethylbenzaldehyde is purified by distillation, it needs to be heated and converted between the gas phase and the liquid phase under the action of a condenser, so that different components are separated at corresponding temperatures to achieve the purpose of purification. However, the structure and position of the condenser tubes in the condenser of existing distillation equipment are fixed, and the inner diameter of the condenser is much larger than the outer diameter of the condenser tubes. Therefore, the high-temperature airflow entering the condenser can only rely on the automatic dissipation of air to contact the condenser tubes, and the passive heat exchange efficiency is extremely low. Therefore, it is necessary to develop a new condenser for the production and purification of 3,4-dimethylbenzaldehyde to address the shortcomings of the existing technology. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides a purification device for the production of 3,4-dimethylbenzaldehyde, which has the advantage of being easy to sample.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a purification device for the production of 3,4-dimethylbenzaldehyde, comprising a distillation tower and a condenser, wherein a coaxial condenser tube is movably installed in the middle of the condenser, and both ends of the condenser tube pass through the condenser and extend to the outside of the condenser, and a feeding mechanism is sleeved between the condenser and the condenser tube;

[0006] The feeding mechanism includes a guide drive assembly fixedly sleeved on one end of the condenser, and the guide drive assembly consists of a guide ring, a feed port, a discharge port, a transmission sleeve and several evenly distributed impellers. The transmission sleeve is coaxially sleeved on the inside of the guide ring, and the transmission sleeve is fixedly sleeved on the outside of the condenser. Several impellers are evenly distributed between the guide ring and the transmission sleeve, one end of several impellers is fixedly connected to the outer surface of the transmission sleeve, and a gap is left between the other end of several impellers and the inner wall of the guide ring.

[0007] Preferably, the axial length of the guide ring is matched with the axial length of the transmission sleeve, and the axial length of the guide ring is smaller than the lengths of the transmission sleeve and the impeller.

[0008] Preferably, one end of the transmission sleeve is fixedly connected to a coaxial balance plate, and the other end of the transmission sleeve is fixedly connected to a coaxial limit plate. The outer surface of the limit plate is fixedly sleeved with a limit bearing, and the limit bearing is fixedly sleeved inside the condenser. The outer diameter of the balance plate is smaller than the inner diameter of the condenser.

[0009] Preferably, the facing surfaces of the balancing plate and the limiting plate are smooth, and gaps are left between the two ends of the guide ring and the facing surfaces of the balancing plate and the limiting plate.

[0010] Preferably, the feed port and the discharge port are fixedly connected to the side of the guide ring, the axes of the feed port and the discharge port are parallel to the tangent of the guide ring, the other end of the feed port passes through the condenser and is connected to the top of the distillation tower, the feed port is fixedly sleeved on the top of the condenser, and the other end of the discharge port is connected to the interior of the condenser.

[0011] Preferably, the condenser includes a heat exchange filter plate arranged in the middle of the condenser, and a gap is left between the outer surface of the heat exchange filter plate and the inner wall of the condenser. The interior of the heat exchange filter plate is fixedly connected to a heat exchange guide pipe, and the two ends of the heat exchange guide pipe are respectively fixedly connected to a water inlet and a water outlet, and the water inlet is fixedly sleeved on the interior of the transmission sleeve, the balance plate and the limit plate, and the outside of the water inlet and the water outlet are fixedly sleeved with positioning bearings, and the positioning bearings are sleeved on the interior of the condenser.

[0012] Preferably, the bottom of the condenser is connected to a discharge pipe at one end away from the feeding mechanism, the side of the discharge pipe is connected to a reflux pipe, the lower end of the distillation tower is connected to a reboiler, a feed pipe is provided on the side of the distillation tower, and the other end of the reflux pipe is connected to the reboiler after passing through the distillation tower.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. Due to the setting of the feeding mechanism of the utility model, the condensing tube inside the condenser can rotate quickly, so that it can timely contact with the high-temperature air flow at any point in the condenser, so that the high-temperature air flow entering the condenser can quickly exchange heat with the condensing tube, thereby effectively improving the condensation efficiency.

[0015] 2. Due to the setting of the heat exchange filter plate, the utility model can not only improve the stability of the heat exchange guide tube, ensure that the condenser tube can be quickly rotated so that it can remain stable with the cooperation of positioning bearings, etc., but also through the heat exchange filter plate, the cold energy emitted by the condenser tube can be fully contacted with the heat energy emitted by the high-temperature air flow in the condenser, thereby reducing energy loss and achieving the effect of energy saving and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional schematic diagram of the condenser of the utility model;

[0017] Figure 2 It is a structural diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the condenser of the utility model;

[0019] Figure 4 This is a front view of the condenser of the utility model;

[0020] Figure 5 This is a schematic structural diagram of the feeding mechanism of the utility model;

[0021] Figure 6 It is a sectional view of the side of the feeding mechanism of the present invention.

[0022] In the figure: 1. Condenser; 2. Condenser; 21. Heat exchange filter plate; 22. Heat exchange guide pipe; 23. Water inlet; 24. Water outlet; 25. Positioning bearing; 3. Feed mechanism; 31. Guide drive assembly; 311. Guide ring; 312. Feed port; 313. Discharge port; 314. Transmission sleeve; 315. Impeller; 32. Balance plate; 33. Limit plate; 34. Limit bearing; 4. Feed pipe; 5. Reflux pipe; 6. Distillation tower; 7. Reboiler; 8. Feed pipe. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figures 1 to 6 As shown, the utility model provides a purification device for the production of 3,4-dimethylbenzaldehyde, comprising a distillation tower 6 and a condenser 1. A coaxial condenser tube 2 is movably installed in the middle of the condenser 1. Both ends of the condenser tube 2 pass through the condenser 1 and extend to the outside of the condenser 1. A feeding mechanism 3 is sleeved between the condenser 1 and the condenser tube 2. Due to the provision of the feeding mechanism 3, the condenser tube 2 inside the condenser 1 can rotate quickly, thereby timely contacting the high-temperature airflow at any point in the condenser 1, so that the high-temperature airflow entering the condenser 1 can quickly exchange heat with the condenser tube 2, thereby effectively improving the condensation efficiency.

[0025] The feeding mechanism 3 includes a guide drive assembly 31 fixedly sleeved on one end of the condenser 2. The guide drive assembly 31 consists of a guide ring 311, a feed port 312, a discharge port 313, a transmission sleeve 314 and a number of evenly distributed impellers 315. The transmission sleeve 314 is coaxially sleeved on the inside of the guide ring 311, and the transmission sleeve 314 is fixedly sleeved on the outside of the condenser 2. The impellers 315 are evenly distributed between the guide ring 311 and the transmission sleeve 314. One end of the impellers 315 is fixedly connected to the outer surface of the transmission sleeve 314, and a gap is left between the other end of the impellers 315 and the inner wall of the guide ring 311. Due to the arrangement of the impellers 315, with the cooperation of the feed port 312 and the discharge port 313, the incoming high-temperature air flow can pass through the transmission sleeve 314 to push the impeller 315 to rotate, thereby driving the water inlet 23 to rotate, so that the condenser 2 as a whole rotates continuously inside the condenser 1.

[0026] like Figure 6 As shown, the axial length of the guide ring 311 is matched with the axial length of the transmission sleeve 314 , and the axial length of the guide ring 311 is smaller than the lengths of the transmission sleeve 314 and the impeller 315 .

[0027] like Figure 6 As shown, one end of the transmission sleeve 314 is fixedly connected to a coaxial balancing plate 32, and the other end of the transmission sleeve 314 is fixedly connected to a coaxial limiting plate 33. The outer surface of the limiting plate 33 is fixedly sleeved with a limiting bearing 34, and the limiting bearing 34 is fixedly sleeved inside the condenser 1. The outer diameter of the balancing plate 32 is smaller than the inner diameter of the condenser 1; due to the setting of the balancing plate 32, the irregular condenser tube 2 can maintain balance as much as possible during rotation, thereby avoiding contact with the inner wall of the condenser 1 and affecting the rotation.

[0028] like Figure 1 and Figure 5 As shown, the facing surfaces of the balancing plate 32 and the limiting plate 33 are smooth, and gaps are left between the two ends of the guide ring 311 and the facing surfaces of the balancing plate 32 and the limiting plate 33.

[0029] like Figure 6 As shown, the feed port 312 and the discharge port 313 are fixedly connected to the side of the guide ring 311, the axes of the feed port 312 and the discharge port 313 are parallel to the tangent of the guide ring 311, the other end of the feed port 312 passes through the condenser 1 and is connected to the top of the distillation tower 6, the feed port 312 is fixedly sleeved on the top of the condenser 1, and the other end of the discharge port 313 is connected to the interior of the condenser 1.

[0030] like Figure 1As shown, the condenser 2 includes a heat exchange filter plate 21 arranged in the middle of the condenser 1, and a gap is left between the outer surface of the heat exchange filter plate 21 and the inner wall of the condenser 1, and a heat exchange guide pipe 22 is fixedly connected to the inside of the heat exchange filter plate 21, and the two ends of the heat exchange guide pipe 22 are fixedly connected to a water inlet 23 and a water outlet 24 respectively. The water inlet 23 is fixedly sleeved on the inside of the transmission sleeve 314, the balance plate 32 and the limit plate 33, and the outside of the water inlet 23 and the water outlet 24 are fixedly sleeved with a positioning bearing 25, which is sleeved on the inside of the condenser 1; due to the arrangement of the heat exchange filter plate 21, not only can the stability of the heat exchange guide pipe 22 be improved, ensuring that the condenser 2 can be quickly rotated so that it can remain stable with the cooperation of the positioning bearing 25, etc., but also through the heat exchange filter plate 21, the cold energy emitted by the condenser 2 can be fully contacted with the heat energy emitted by the high-temperature airflow filled in the condenser 1, thereby reducing energy loss and achieving the effect of energy saving and emission reduction.

[0031] like Figure 1 and Figure 2 As shown, the bottom of the condenser 1 is connected to one end away from the feeding mechanism 3 with a discharge pipe 4, the side of the discharge pipe 4 is connected to a reflux pipe 5, the lower end of the distillation tower 6 is connected to a reboiler 7, a feed pipe 8 is provided on the side of the distillation tower 6, and the other end of the reflux pipe 5 is connected to the reboiler 7 after passing through the distillation tower 6.

[0032] The working principle and use process of this utility model:

[0033] The equipment is installed as shown in the figure. During the distillation process, the high-temperature gas enters the guide ring 311 from the feed inlet 312 and pushes the impeller 315, thereby causing the transmission sleeve 314 to drive the condenser 2 to rotate. With the cooperation of the positioning bearing 25, the heat exchange filter plate 21 and the heat exchange guide tube 22 rotate as a whole inside the condenser 1. The gas that pushes the impeller 315 along the inside of the guide ring 311 is finally discharged from the discharge port 313 into the inside of the condenser 1 and contacts the condenser 2. Due to the continuous rotation of the heat exchange filter plate 21 and the heat exchange guide tube 22, the gas entering the condenser 1 can quickly and fully contact the heat exchange filter plate 21 and the heat exchange guide tube 22, thereby effectively improving the heat exchange efficiency; more importantly, the high-temperature gas entering the condenser 1 can fill the condenser 1 as much as possible to ensure that the cold energy emitted by the condenser 2 can be completely exchanged with the heat energy emitted by the condenser 1, thereby improving the energy utilization efficiency.

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0035] 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 purification device for producing 3,4-dimethylbenzaldehyde, comprising a distillation tower (6) and a condenser (1), characterized in that: A coaxial condenser tube (2) is movably mounted in the middle of the condenser (1), both ends of the condenser tube (2) pass through the condenser (1) and extend to the outside of the condenser (1), and a feeding mechanism (3) is sleeved between the condenser (1) and the condenser tube (2); The feeding mechanism (3) includes a guide drive assembly (31) fixedly sleeved on one end of the condenser (2), the guide drive assembly (31) consisting of a guide ring (311), a feed port (312), a discharge port (313), a transmission sleeve (314) and a plurality of evenly distributed impellers (315), the transmission sleeve (314) being coaxially sleeved inside the guide ring (311), the transmission sleeve (314) being fixedly sleeved on the outside of the condenser (2), the plurality of impellers (315) being evenly distributed between the guide ring (311) and the transmission sleeve (314), one end of the plurality of impellers (315) being fixedly connected to the outer surface of the transmission sleeve (314), and a gap being left between the other end of the plurality of impellers (315) and the inner wall of the guide ring (311).

2. A purification device for producing 3,4-dimethylbenzaldehyde according to claim 1, characterized in that: The axial length of the guide ring (311) is compatible with the axial length of the transmission sleeve (314), and the axial length of the guide ring (311) is smaller than the lengths of the transmission sleeve (314) and the impeller (315).

3. A purification device for producing 3,4-dimethylbenzaldehyde according to claim 1, characterized in that: One end of the transmission sleeve (314) is fixedly connected to a coaxial balancing plate (32), and the other end of the transmission sleeve (314) is fixedly connected to a coaxial limiting plate (33). The outer surface of the limiting plate (33) is fixedly sleeved with a limiting bearing (34), and the limiting bearing (34) is fixedly sleeved inside the condenser (1). The outer diameter of the balancing plate (32) is smaller than the inner diameter of the condenser (1).

4. A purification device for producing 3,4-dimethylbenzaldehyde according to claim 3, characterized in that: The facing surfaces of the balancing plate (32) and the limiting plate (33) are both smooth, and gaps are left between the two ends of the guide ring (311) and the facing surfaces of the balancing plate (32) and the limiting plate (33).

5. A purification device for producing 3,4-dimethylbenzaldehyde according to claim 1, characterized in that: The feed port (312) and the discharge port (313) are fixedly connected to the side of the guide ring (311); the axes of the feed port (312) and the discharge port (313) are parallel to the tangent of the guide ring (311); the other end of the feed port (312) passes through the condenser (1) and is connected to the top of the distillation tower (6); the feed port (312) is fixedly sleeved on the top of the condenser (1); and the other end of the discharge port (313) is connected to the interior of the condenser (1).

6. A purification device for producing 3,4-dimethylbenzaldehyde according to claim 3, characterized in that: The condenser (2) includes a heat exchange filter plate (21) arranged in the middle of the condenser (1), a gap is left between the outer surface of the heat exchange filter plate (21) and the inner wall of the condenser (1), the interior of the heat exchange filter plate (21) is fixedly connected with a heat exchange guide pipe (22), the two ends of the heat exchange guide pipe (22) are respectively fixedly connected with a water inlet (23) and a water outlet (24), the water inlet (23) is fixedly sleeved on the inside of the transmission sleeve (314), the balance plate (32) and the limit plate (33), the outside of the water inlet (23) and the water outlet (24) are fixedly sleeved with a positioning bearing (25), and the positioning bearing (25) is sleeved on the inside of the condenser (1).

7. A purification device for producing 3,4-dimethylbenzaldehyde according to claim 1, characterized in that: The bottom of the condenser (1) is connected to a feed pipe (4) at one end away from the feed mechanism (3), and a reflux pipe (5) is connected to the side of the feed pipe (4). The lower end of the distillation tower (6) is connected to a reboiler (7), and a feed pipe (8) is provided on the side of the distillation tower (6). The other end of the reflux pipe (5) is connected to the reboiler (7) after passing through the distillation tower (6).

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