A double-kettle esterification reaction device

Abstract

The utility model provides a kind of double kettle esterification reaction device, including jar body, condenser, collection mechanism and separation subassembly, the condenser is arranged in jar body outside, the top surface of the condenser is provided with water pump, the bottom surface of the condenser is connected with support leg, the side of the condenser is provided with gear set, the gear set includes first gear and second gear, the other side of the condenser is connected with gas pipeline by bearing, the other end of the gas pipeline is connected in the surface of jar body by bearing, the bottom surface of the condenser is opened with discharge port, the side of the condenser is opened with exhaust port, the device is rotated by the collection mechanism of installation, motor drives first rotating shaft, to linkage scraper and scrape the liquid condensed on the inner wall of gas pipeline into the surface of oblique convex strip, avoid the pipe blockage caused by long residence time of liquid on the inner wall of pipeline and form scale.

Description

Technical Field

[0001] This utility model relates to the field of esterification reaction technology, specifically a dual-reactor esterification reaction apparatus. Background Technology

[0002] Esterification is a classic organic reaction in which carboxylic acids and alcohols undergo dehydration condensation to form ester bonds. As a basic synthetic method, it is widely used in the preparation of fine chemicals such as fragrances, plasticizers, solvents, and pharmaceutical intermediates. According to existing technology, such as the plasticizer esterification reaction apparatus described in Chinese patent document CN207478579U, the disclosed technical solution involves adding alcohol, terephthalic acid, octanol, and titanate catalyst into the esterification reaction apparatus body through the feed port, then closing the control valve, and heating the mixture under the stirring action of the stirring device and the heating device. The mixture reacts inside the esterification reaction apparatus body to produce water, and the evaporated alcohol enters the next process stage through the gas supply pipe at the top of the esterification reaction apparatus body.

[0003] According to its publicly available technical solution, the existing technology uses a gas transmission pipe connected to the top of the tank to transport a large amount of steam generated inside the tank to the condenser for condensation. When the steam passes through the gas transmission pipe, a small amount of gas will condense into liquid inside the gas transmission pipe and adhere to the inner wall of the pipe. If the liquid on the inner wall of the gas transmission pipe stays for a long time, it will form scale. The scale accumulates inside the gas transmission pipe and eventually causes the pipe to become blocked. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a dual-reactor esterification reactor to solve the problems mentioned in the background. This invention uses an installed collection mechanism, where a motor drives the first rotating shaft to rotate, thereby coordinating the rotation of the gas pipeline. During the process, a scraper scrapes the condensed liquid on the inner wall of the gas pipeline into the surface of the inclined convex strip, which eventually flows into the condenser. This avoids the liquid from staying on the inner wall of the pipeline for a long time and forming scale, thus preventing blockage of the gas pipeline and eliminating the need for manual cleaning of the pipeline interior later.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a dual-reactor esterification reaction apparatus, comprising a reaction apparatus body, the reaction apparatus body including a tank, a condenser, a collection mechanism, and a separation component, the condenser being disposed outside the tank, a water pump being disposed on the top surface of the condenser, a support leg being connected to the bottom surface of the condenser, a gear set being disposed on one side of the condenser, the gear set including a first gear and a second gear, a gas supply pipe being connected to the other side of the condenser via a bearing, the other end of the gas supply pipe being connected to the surface of the tank via a bearing, an outlet being provided on the bottom surface of the condenser, and an exhaust port being provided on the side surface of the condenser.

[0006] Furthermore, the collecting mechanism includes a scraper, an oblique convex strip, a first gear, and a fixing rod. The scraper and the oblique convex strip are both disposed inside the gas transmission pipe. An annular convex strip is installed on the inner wall of the gas transmission pipe. A groove is formed on the top surface of the scraper, and the annular convex strip is embedded inside the groove.

[0007] Furthermore, the side of the oblique convex strip is welded to the surface of the scraper, the top surface of the oblique convex strip is provided with a guide groove, a motor is provided on the side of the first gear, a first rotating shaft is inserted into the central area of ​​the first gear, and the end of the first rotating shaft is inserted into the output end of the motor.

[0008] Furthermore, a connecting rod and a fan blade are welded to the surface of the first rotating shaft, and the other end of the connecting rod is welded to the inner wall of the gas pipeline.

[0009] Furthermore, the fan blade is disposed at the end of the gas transmission pipe, one end of the fixing rod is welded to the end of the scraper, and the other end of the fixing rod is welded to the inner wall of the condenser.

[0010] Furthermore, the separation assembly includes a second gear and a cleaning scraper. A heat-conducting disk is provided inside the condenser. A heat-dissipating water pipe is connected to the top surface of the heat-conducting disk. The bottom surface of the heat-dissipating water pipe is welded to the top surface of the heat-conducting disk. A circulation pipe is connected to the end of the heat-dissipating water pipe. The other end of the circulation pipe is connected to the output end of the water pump.

[0011] Furthermore, a second rotating shaft is welded to the central region of the second gear, and the other end of the second rotating shaft passes through the surface of the heat-conducting disk. The second gear meshes with the first gear.

[0012] Furthermore, the heat-conducting discs are spaced apart, the cleaning scraper is disposed inside the space, the end of the cleaning scraper is welded to the surface of the second rotating shaft, and a scraper blade is mounted on the surface of the cleaning scraper.

[0013] The beneficial effects of this utility model are:

[0014] 1. This dual-reactor esterification reactor uses an installed collection mechanism and a motor-driven first rotating shaft to rotate, which in turn drives the gas pipeline to rotate synchronously. During the process, a scraper scrapes the condensed liquid on the inner wall of the gas pipeline into the surface of the inclined convex strip, and finally flows into the condenser. This avoids the liquid from staying on the inner wall of the pipeline for a long time and forming scale, thereby preventing the gas pipeline from being blocked. It also saves the need for manual cleaning of the inside of the pipeline later.

[0015] 2. The dual-reactor esterification reactor uses a separation component to promptly scrape away the condensed liquid on the surface of the heat-conducting disk while the cleaning scraper rotates. This prevents the condensed liquid from remaining on the surface of the heat-conducting disk for a long time, forming scale, which would otherwise reduce the heat transfer efficiency and ensure the stable operation of the condenser. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of a dual-reactor esterification reaction apparatus according to the present invention;

[0017] Figure 2 This is a cross-sectional view of the condenser of a dual-reactor esterification reaction apparatus according to the present invention;

[0018] Figure 3 This is a schematic diagram of the scraper of a dual-reactor esterification reaction apparatus according to the present invention;

[0019] Figure 4 This is a split view of the gas delivery pipeline of a dual-reactor esterification reaction device according to this utility model;

[0020] Figure 5 This is a schematic diagram of the gear assembly of a dual-reactor esterification reaction apparatus according to the present invention.

[0021] In the diagram: 1. Tank; 2. Collection mechanism; 3. Separation component; 4. Gas delivery pipeline; 5. Water pump; 6. Circulation pipeline; 7. Condenser; 8. Gear set; 9. Slanted convex strip; 10. Fixed rod; 11. Fan blade; 12. Connecting rod; 13. First rotating shaft; 14. Cooling water pipe; 15. Heat-conducting disc; 16. Cleaning scraper; 17. Motor; 18. Second rotating shaft; 19. Scraper; 20. First gear; 21. Second gear. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please see Figures 1 to 5This utility model provides the following technical solution: a dual-reactor esterification reaction apparatus, comprising a reaction apparatus body, the reaction apparatus body including a tank 1, a condenser 7, a collection mechanism 2, and a separation component 3, the condenser 7 being disposed on the outside of the tank 1, a water pump 5 being disposed on the top surface of the condenser 7, a support leg being connected to the bottom surface of the condenser 7, a gear set 8 being disposed on one side of the condenser 7, the gear set 8 including a first gear 20 and a second gear 21, a gas supply pipe 4 being connected to the other side of the condenser 7 via a bearing, the other end of the gas supply pipe 4 being connected to the surface of the tank 1 via a bearing, an outlet being opened on the bottom surface of the condenser 7, and an exhaust port being opened on the side surface of the condenser 7, the rotation of the gear set 8 causing the gas supply pipe 4 and the cleaning scraper 16 to rotate, during the rotation of the gas supply pipe 4, the scraper 19 scrapes off the condensed liquid on the inner wall of the gas supply pipe 4, and the rotation of the cleaning scraper 16 scrapes off the condensed liquid on the surface of the heat-conducting disk 15.

[0024] In this embodiment, the collecting mechanism 2 includes a scraper 19, an oblique convex strip 9, a first gear 20, and a fixing rod 10. Both the scraper 19 and the oblique convex strip 9 are disposed inside the gas delivery pipe 4. An annular convex strip is installed on the inner wall of the gas delivery pipe 4. A groove is formed on the top surface of the scraper 19, and the annular convex strip is embedded inside the groove. The side of the oblique convex strip 9 is welded to the surface of the scraper 19, and a guide groove is formed on the top surface of the oblique convex strip 9. A motor 17 is disposed on the side of the first gear 20. A first rotating shaft 13 is inserted into the central region of the first gear 20, and the end of the first rotating shaft 13 is inserted into the output end of the motor 17. A connecting rod 12 and a fan blade 11 are welded to the surface of the shaft 13. The other end of the connecting rod 12 is welded to the inner wall of the gas pipeline 4. The fan blade 11 is located at the end of the gas pipeline 4. One end of the fixing rod 10 is welded to the end of the scraper 19. The other end of the fixing rod 10 is welded to the inner wall of the condenser 7. The rotation of the first rotating shaft 13 is linked to the synchronous rotation of the gas pipeline 4. The scraper 19 is restricted by the fixing rod 10 and cannot move synchronously. As a result, the annular convex strip on the inner wall of the gas pipeline 4 slides inside the groove on the top surface of the scraper 19. During the process, the scraper 19 scrapes a small amount of condensed liquid on the inner wall of the gas pipeline 4 into the oblique convex strip 9, and finally flows into the interior of the condenser 7.

[0025] In this embodiment, the separation component 3 includes a second gear 21 and a cleaning scraper 16. A heat-conducting disk 15 is disposed inside the condenser 7. A heat-dissipating water pipe 14 is connected to the top surface of the heat-conducting disk 15, and the bottom surface of the heat-dissipating water pipe 14 is welded to the top surface of the heat-conducting disk 15. A circulation pipe 6 is connected to the end of the heat-dissipating water pipe 14, and the other end of the circulation pipe 6 is connected to the output end of the water pump 5. A second rotating shaft 18 is welded to the central area of ​​the second gear 21, and the other end of the second rotating shaft 18 passes through the surface of the heat-conducting disk 15. The second gear 21 meshes with the first gear 20. The discs 15 are spaced apart, and the cleaning scraper 16 is disposed inside the space. The end of the cleaning scraper 16 is welded to the surface of the second rotating shaft 18. The surface of the cleaning scraper 16 is equipped with a scraper blade. The motor 17 drives the first rotating shaft 13 to rotate, thereby causing the second rotating shaft 18 to rotate in conjunction. The rotation of the second rotating shaft 18 causes the cleaning scraper 16 welded to the surface of the second rotating shaft 18 to rotate synchronously, thereby scraping off the condensed liquid adhering to the surface of the heat-conducting discs 15 in a timely manner, avoiding the condensed liquid from remaining on the surface of the heat-conducting discs 15 for a long time and forming scale, which would lead to a decrease in heat transfer efficiency.

[0026] Working principle: Esterification reaction inside tank 1 generates steam. When motor 17 is turned on, it drives the first gear 20 to rotate. The first gear 20 meshes with the second gear 21, causing the second gear 21 to rotate synchronously. The rotation of the first gear 20 and the second gear 21 drives the first rotating shaft 13 and the second rotating shaft 18 to rotate synchronously. The rotation of the first rotating shaft 13 causes the fan blades 11 welded to its surface and the connecting rod 12 to rotate synchronously. The rotation of the fan blades 11 blows the steam inside tank 1 into the gas pipeline 4, where the steam ultimately passes through... The gas enters the condenser 7 through the gas delivery pipe 4 for condensation. Inside the condenser 7, the gas contacts the heat-conducting disk 15 for cooling and condensation. The heat-conducting disk 15 then contacts the heat dissipation water pipe 14, transferring heat from the disk to the pipe. The water inside the heat dissipation water pipe 14 is then transported to the outside of the condenser 7 via the circulation pipe 6 for further cooling. The water in the circulation pipe 6 is then pumped back into the pipe by the water pump 5, ultimately flowing back to the heat dissipation water pipe 14 for circulation. The other end of the connecting rod 12 is welded to the inner wall of the gas delivery pipe 4, causing the pipe to rotate. The annular protrusion on the inner wall of the gas pipeline 4 is embedded in the groove on the top of the scraper 19. The scraper 19 is restricted by the fixing rod 10 and cannot move synchronously. As a result, the annular protrusion on the inner wall of the gas pipeline 4 slides inside the groove on the top surface of the scraper 19. During this process, the scraper 19 scrapes a small amount of condensed liquid on the inner wall of the gas pipeline 4 into the oblique protrusion 9, and finally flows into the condenser 7. This avoids the liquid from staying on the inner wall of the pipeline for a long time and forming scale, thereby preventing the gas pipeline 4 from becoming blocked. The rotation of the second rotating shaft 18 causes the cleaning scraper 16 welded to the surface of the second rotating shaft 18 to move synchronously. The cleaning scraper 16 is rotated and positioned in the interval area of ​​the heat-conducting disk 15. The scraper blades on the surface of the cleaning scraper 16 contact the surface of the heat-conducting disk 15, thereby promptly scraping away the condensed liquid adhering to the surface of the heat-conducting disk 15. This prevents the condensed liquid from remaining on the surface of the heat-conducting disk 15 for a long time and forming scale, which would lead to a decrease in heat transfer efficiency and ensure the stable operation of the condenser 7. The condensed gas inside the condenser 7 is discharged through the exhaust port on the side of the condenser 7, and the liquid formed after the gas inside the condenser 7 is condensed is discharged through the exhaust port opened at the bottom of the condenser 7.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dual-reactor esterification reactor, comprising a reactor body, characterized in that: The reaction device body includes a tank (1), a condenser (7), a collection mechanism (2), and a separation component (3). The condenser (7) is located outside the tank (1). A water pump (5) is installed on the top surface of the condenser (7). A support leg is connected to the bottom surface of the condenser (7). A gear set (8) is installed on one side of the condenser (7). The gear set (8) includes a first gear (20) and a second gear (21). A gas supply pipe (4) is connected to the other side of the condenser (7) through a bearing. The other end of the gas supply pipe (4) is connected to the surface of the tank (1) through a bearing. An outlet is opened on the bottom surface of the condenser (7), and an exhaust port is opened on the side surface of the condenser (7).

2. The dual-reactor esterification reactor according to claim 1, characterized in that: The collecting mechanism (2) includes a scraper (19), an oblique convex strip (9), a first gear (20) and a fixing rod (10). The scraper (19) and the oblique convex strip (9) are both arranged inside the gas transmission pipe (4). An annular convex strip is installed on the inner wall of the gas transmission pipe (4). A groove is opened on the top surface of the scraper (19), and the annular convex strip is embedded in the groove.

3. The dual-reactor esterification reactor according to claim 2, characterized in that: The side of the oblique convex strip (9) is welded to the surface of the scraper (19). A guide groove is provided on the top surface of the oblique convex strip (9). A motor (17) is provided on the side of the first gear (20). A first rotating shaft (13) is inserted into the central area of ​​the first gear (20). The end of the first rotating shaft (13) is inserted into the output end of the motor (17).

4. The dual-reactor esterification reactor according to claim 3, characterized in that: The first rotating shaft (13) has a connecting rod (12) and a fan blade (11) welded to its surface, and the other end of the connecting rod (12) is welded to the inner wall of the gas pipeline (4).

5. The dual-reactor esterification reactor according to claim 4, characterized in that: The fan blade (11) is located at the end of the gas pipeline (4), one end of the fixing rod (10) is welded to the end of the scraper (19), and the other end of the fixing rod (10) is welded to the inner wall of the condenser (7).

6. The dual-reactor esterification reactor according to claim 1, characterized in that: The separation component (3) includes a second gear (21) and a cleaning scraper (16). The condenser (7) is provided with a heat-conducting disc (15). The top surface of the heat-conducting disc (15) is connected to a heat dissipation water pipe (14). The bottom surface of the heat dissipation water pipe (14) is welded to the top surface of the heat-conducting disc (15). The end of the heat dissipation water pipe (14) is connected to a circulation pipe (6). The other end of the circulation pipe (6) is connected to the output end of the water pump (5).

7. The dual-reactor esterification reactor according to claim 6, characterized in that: The second gear (21) has a second rotating shaft (18) welded to its central area. The other end of the second rotating shaft (18) passes through the surface of the heat-conducting disk (15). The second gear (21) meshes with the first gear (20).

8. The dual-reactor esterification reactor according to claim 7, characterized in that: The heat-conducting discs (15) are spaced apart, and the cleaning scraper (16) is disposed inside the spaced apart. The end of the cleaning scraper (16) is welded to the surface of the second rotating shaft (18), and a scraper blade is mounted on the surface of the cleaning scraper (16).

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