A terephthalic acid dioctyl ester production esterification kettle

Abstract

The utility model relates to the technical field of dioctyl phthalate, and disclose an esterification kettle for dioctyl terephthalate production, including support board and the cover, the top of support board is opened and has supported opening, the inside fixed connection of support opening has the cauldron body, the bottom of cover and the top of cauldron body all are fixedly connected with circular ring board, two circular ring boards are connected through the screw and the nut between, the cooperation and use of first motor, rotating shaft, rotating plate, transmission gear, circular ring rack, rotating gear and cleaning brush under the device, make its rotating rod rotate, and drive the stirring plate in the rotating process to the reaction material in the cauldron body even stirring treatment, and drive the cleaning scraper of bottom rotation through rotating shaft, avoid the phenomenon that the reaction material appears to appear to accumulate cauldron bottom end, improve the reaction stability of subsequent reaction material.

Description

Technical Field

[0001] This utility model relates to the field of dioctyl terephthalate technology, specifically to an esterification reactor for the production of dioctyl terephthalate. Background Technology

[0002] Dioctyl terephthalate (DTP) is an organic compound and one of the most widely used plasticizers in the plastics industry. When added during the processing and molding of plastic products, it can significantly improve the flexibility of the finished product. An esterification reactor is the equipment that carries out the esterification reaction when DTP is added. The esterification reactor can react DTP with a catalyst.

[0003] A search revealed that Chinese utility model patent CN213590423U discloses a dioctyl terephthalate esterification reactor, comprising a reactor body and a coil. A motor is installed at the top of the reactor body, and the motor is connected to a stirring device inside the reactor body. A discharge port is provided at the bottom of the reactor body. A first feed port, a second feed port, an air outlet, and a vacuum extraction port are also provided above the reactor body. The first feed port is sealed and connected to an octanol storage tank. The second feed port is provided with a sealing cover. The air outlet is sealed and connected to a condenser. The condenser is connected to an alcohol-water separator. The water outlet of the alcohol-water separator is connected to a water tank, and the alcohol outlet is connected to the octanol storage tank. The vacuum extraction port is connected to a vacuum pump.

[0004] Although this device can remove the water generated during the esterification reaction and realize the recycling of octanol, in actual use, reactants tend to accumulate at the bottom of the esterification vessel. Over time, this accumulation can affect the normal use of the esterification vessel. In existing technologies, the esterification vessel often needs to be disassembled and cleaned manually, which greatly reduces the efficiency of the esterification vessel. Therefore, an esterification vessel for the production of dioctyl phthalate with anti-deposition function is proposed. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an esterification reactor for the production of dioctyl phthalate.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: an esterification reactor for the production of dioctyl terephthalate, comprising a support plate and a cover, wherein a support opening is provided at the top of the support plate, and a reactor body is fixedly connected inside the support opening; both the bottom end of the cover and the top end of the reactor body are fixedly connected to a ring plate, and the two ring plates are connected by screws and nuts.

[0009] The top of the cap is fixedly connected to multiple support columns, and the bottom ends of the multiple support columns are fixedly connected to an installation plate. The top of the installation plate is fixedly connected to a first motor, and the output end of the first motor is fixedly connected to a rotating shaft. The bottom end of the rotating shaft extends into the interior of the vessel body. A stirring plate is installed on the outer wall of the rotating shaft through a transmission mechanism. A cleaning rod is fixedly connected to the bottom end of the rotating shaft, and a cleaning scraper is fixedly connected to the outer wall of the cleaning rod.

[0010] The bottom of the vessel body is provided with a discharge opening, and a discharge pipe is fixedly installed inside the discharge opening. A discharge valve is fixedly connected to the outer wall of the discharge pipe.

[0011] Preferably, the transmission mechanism includes a ring rack, the outer wall of which is fixedly connected to the inner wall of the vessel body. Two rotating plates are fixedly connected to the outer wall of the rotating shaft, and a rotating rod is rotatably connected between the two rotating plates. The top end of the rotating rod extends to the top end of the rotating plate, and a transmission rod is rotatably connected to the top end of the rotating plate. A transmission gear is fixedly connected to the top end of the transmission rod, and one end of the transmission gear meshes with one end of the ring rack. A rotating gear is fixedly connected to the top end of the rotating rod, and one end of the rotating gear meshes with one end of the transmission gear. One end of the stirring plate is fixedly connected to the outer wall of the rotating rod.

[0012] Preferably, a cleaning brush is fixedly installed at one end of each of the two stirring plates.

[0013] Preferably, a stabilizing column is fixedly connected to each of the four corners of the bottom end of the support plate, and an anti-slip pad is fixedly connected to the bottom end of each of the four stabilizing columns.

[0014] Preferably, the top of the cover has an air vent, and an air vent pipe is fixedly installed inside the air vent.

[0015] Preferably, an observation window is fixedly installed on the outer wall of the vessel.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides an esterification reactor for the production of dioctyl terephthalate, which has the following beneficial effects:

[0018] This esterification reactor for the production of dioctyl terephthalate works by pouring the reaction materials into the reactor body. A first motor, rotating shaft, rotating plate, transmission gear, ring rack, and rotating gear work together to rotate the rotating rod. During rotation, the stirring plate is driven to uniformly stir the reaction materials inside the reactor body. The rotating shaft also drives the bottom cleaning scraper to rotate, preventing the reaction materials from accumulating at the bottom of the reactor body and improving the reaction stability of subsequent reaction materials. Attached Figure Description

[0019] Figure 1 This is a front view structural diagram of the present invention;

[0020] Figure 2 This is a front view cross-sectional structural diagram of the vessel body of this utility model;

[0021] Figure 3 This is a front view cross-sectional structural diagram of the vessel body and the lid of this utility model;

[0022] Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0023] In the diagram: 1. Support plate; 2. Cover; 3. Kettle body; 4. Circular ring plate; 5. Screw; 6. Nut; 7. Support column; 8. Mounting plate; 9. First motor; 10. Rotating shaft; 11. Stirring plate; 12. Cleaning rod; 13. Cleaning scraper; 14. Discharge pipe; 15. Discharge valve; 16. Circular ring rack; 17. Rotating plate; 18. Rotating rod; 19. Transmission rod; 20. Transmission gear; 21. Rotating gear; 22. Cleaning brush; 23. Stabilizing column; 24. Anti-slip pad; 25. Air outlet pipe; 26. Observation window. Detailed Implementation

[0024] Please see Figure 1-4An esterification reactor for the production of dioctyl terephthalate includes a support plate 1 and a cover 2. The top of the support plate 1 has a support opening, and a reactor body 3 is fixedly connected inside the support opening. Circular ring plates 4 are fixedly connected to both the bottom of the cover 2 and the top of the reactor body 3. Two circular ring plates 4 are connected by screws 5 and nuts 6. Multiple support columns 7 are fixedly connected to the top of the cover 2. A mounting plate 8 is fixedly connected between the bottom ends of the multiple support columns 7. A first motor 9 is fixedly connected to the top of the mounting plate 8. A rotating shaft 10 is fixedly connected to the output end of the first motor 9. The bottom end of the rotating shaft 10 extends into the interior of the vessel body 3. A stirring plate 11 is installed on the outer wall of the rotating shaft 10 via a transmission mechanism. A cleaning rod 12 is fixedly connected to the bottom end of the rotating shaft 10, and a cleaning scraper 13 is fixedly connected to the outer wall of the cleaning rod 12. A discharge opening is provided at the bottom end of the vessel body 3, and a discharge pipe is fixedly installed inside the discharge opening. A discharge valve 15 is fixedly connected to the outer wall of the discharge pipe 14. The transmission mechanism includes a ring rack 16, the outer wall of which is fixedly connected to the inner wall of the vessel body 3. Two [unclear characters] are fixedly connected to the outer wall of the rotating shaft 10. A rotating plate 17 is rotatably connected to two rotating plates 17, with the top end of the rotating rod 18 extending to the top end of the rotating plate 17. A transmission rod 19 is rotatably connected to the top end of the rotating plate 17, and a transmission gear 20 is fixedly connected to the top end of the transmission rod 19. One end of the transmission gear 20 meshes with one end of the ring rack 16. A rotating gear 21 is fixedly connected to the top end of the rotating rod 18, and the rotating gear 21 meshes with one end of the transmission gear 20. One end of the stirring plate 11 is fixedly connected to the outer wall of the rotating rod 18, and one end of both stirring plates 11 is fixedly connected to the outer wall of the rotating rod 18. A cleaning brush 22 is fixedly installed. After the reaction material is poured into the inside of the vessel body 3, the first motor 9, rotating shaft 10, rotating plate 17, transmission gear 20, ring rack 16, rotating gear 21 and cleaning brush 22 work together to rotate the rotating rod 18. During the rotation, the stirring plate 11 is driven to uniformly stir the reaction material inside the vessel body 3. The rotating shaft 10 drives the cleaning scraper 13 at the bottom to rotate, which prevents the reaction material from accumulating at the bottom of the vessel body 3 and improves the reaction stability of the subsequent reaction material.

[0025] It should also be noted that a stabilizing column 23 is fixedly connected to the four corners of the bottom of the support plate 1, and an anti-slip pad 24 is fixedly connected to the bottom of each of the four stabilizing columns 23, which further improves the stability of the overall device position. The top of the cover 2 is provided with a gas outlet, and a gas outlet pipe 25 is fixedly installed inside the gas outlet. An observation window 26 is fixedly installed on the outer wall of the vessel body 3, which allows for a more intuitive view of the reaction process inside the esterification vessel body 3.

[0026] In summary, when using the esterification reactor for the production of dioctyl terephthalate, the reaction materials are first poured into the reactor body 3. Then, the cap 2 is installed using screws 5 and nuts 6. After the first motor 9 is powered on, its output drives the rotating shaft 10 to rotate, which in turn drives the rotating plate 17 to rotate. The transmission gear 20 meshes with the ring rack 16, which in turn drives the transmission rod 19 to rotate. Simultaneously, the transmission gear 20 meshes with the rotating gear 21, which in turn drives the rotating rod 18 to rotate. During this rotation, the stirring plate 11 is driven to uniformly stir the reaction materials inside the reactor body 3. The rotating shaft 10 drives the bottom cleaning scraper 13 to rotate, cleaning the bottom of the reactor body 3 to prevent the accumulation of reaction materials. During the rotation of the stirring plate 11, the cleaning brush 22 is driven to rotate, cleaning the inner wall of the reactor body 3.

Claims

1. An esterification reactor for the production of dioctyl terephthalate, comprising a support plate (1) and a cover (2), characterized in that: The top of the support plate (1) is provided with a support opening, and the vessel body (3) is fixedly connected inside the support opening. The bottom of the cover (2) and the top of the vessel body (3) are both fixedly connected with a ring plate (4). The two ring plates (4) are connected to each other by screws (5) and nuts (6). The top of the cover (2) is fixedly connected to a plurality of support columns (7), and the bottom ends of the plurality of support columns (7) are fixedly connected to an installation plate (8). The top of the installation plate (8) is fixedly connected to a first motor (9), and the output end of the first motor (9) is fixedly connected to a rotating shaft (10). The bottom end of the rotating shaft (10) extends into the interior of the vessel body (3). A stirring plate (11) is installed on the outer wall of the rotating shaft (10) through a transmission mechanism. A cleaning rod (12) is fixedly connected to the bottom end of the rotating shaft (10), and a cleaning scraper (13) is fixedly connected to the outer wall of the cleaning rod (12). The bottom end of the vessel body (3) is provided with a discharge opening, and a discharge pipe is fixedly installed inside the discharge opening. (14) A discharge valve (15) is fixedly connected to the outer wall of the discharge pipe.

2. The esterification reactor for the production of dioctyl terephthalate according to claim 1, characterized in that: The transmission mechanism includes a ring rack (16), the outer wall of which is fixedly connected to the inner wall of the vessel body (3). Two rotating plates (17) are fixedly connected to the outer wall of the rotating shaft (10). A rotating rod (18) is rotatably connected between the two rotating plates (17). The top end of the rotating rod (18) extends to the top end of the rotating plate (17). A transmission rod (19) is rotatably connected to the top end of the rotating plate (17). A transmission gear (20) is fixedly connected to the top end of the transmission rod (19). One end of the transmission gear (20) meshes with one end of the ring rack (16). A rotating gear (21) is fixedly connected to the top end of the rotating rod (18). One end of the rotating gear (21) meshes with one end of the transmission gear (20). One end of the stirring plate (11) is fixedly connected to the outer wall of the rotating rod (18).

3. The esterification reactor for the production of dioctyl terephthalate according to claim 2, characterized in that: A cleaning brush (22) is fixedly installed at one end of each of the two stirring plates (11).

4. The esterification reactor for the production of dioctyl terephthalate according to claim 3, characterized in that: The support plate (1) has a stabilizing column (23) fixedly connected at the four corners of its bottom end, and the bottom ends of the four stabilizing columns (23) are fixedly connected with anti-slip pads (24).

5. The esterification reactor for the production of dioctyl terephthalate according to claim 4, characterized in that: The top of the cover (2) is provided with an air outlet, and an air outlet pipe (25) is fixedly installed inside the air outlet.

6. The esterification reactor for the production of dioctyl terephthalate according to claim 5, characterized in that: An observation window (26) is fixedly installed on the outer wall of the vessel body (3).

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