Gas phase reactor for producing adiponitrile from adipic acid

Abstract

The utility model discloses a gas phase reactor for producing adiponitrile from adipic acid, which comprises a reaction cylinder body, a lower sealing head arranged at the bottom end of the reaction cylinder body, heating blocks arranged on two sides of the bottom of the lower sealing head, supporting legs arranged at equal intervals at the edge position of the bottom end of the lower sealing head, and a transmission case arranged at the top of an upper sealing head, a driving gear is rotatably mounted at the center of the top end of the top frame, a first driven gear is rotatably mounted at the top end of the top frame on one side of the driving gear, and a second driven gear is rotatably mounted at the top end of the top frame on one side, away from the first driven gear, of the driving gear; a first stirring paddle is rotationally mounted on one side of the top end of the underframe; a second stirring paddle is rotationally mounted on the top end of the underframe on one side of the first stirring paddle. According to the utility model, not only is the reaction efficiency of the reactor to a medium ensured, but also the sealing performance of the reactor in use is ensured, and the reaction effect of the reactor to the medium in use is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of reactors, in particular to a gas phase reactor for producing adiponitrile from adipic acid. Background Art

[0002] Adiponitrile is an important organic chemical raw material, which is widely used in the production of polymer materials such as nylon and polyurethane. At present, the production methods of adiponitrile mainly include gas phase method and liquid phase method. The gas phase method occupies an important position in the production of adiponitrile due to its advantages such as high reaction efficiency, high product purity and simple operation. Therefore, the corresponding gas phase reactor for producing adiponitrile from adipic acid has been derived.

[0003] A gas phase reactor for producing adipic acid from hexonitrile with reference publication number CN208944068U comprises a cylinder with a jacket, characterized in that an upper head with a jacket is arranged at the top of the cylinder, a material inlet for introducing adipic acid material and a seminitrile product is arranged on the side wall near the bottom of the upper head, a gas phase product outlet pipe is arranged on the upper side wall of the upper head, a stirring scraper connected to an external variable frequency motor is arranged in the cylinder, a lower head with a jacket is arranged at the bottom of the cylinder, an ammonia inlet pipe is arranged on the side wall of the lower head, a tar outlet is arranged at the bottom of the lower head, and an upper head is arranged The head jacket has a heat medium inlet and an upper head jacket has a heat medium outlet; the cylinder is provided with a cylinder jacket heat medium inlet and a cylinder jacket heat medium outlet; the lower head is provided with a lower head jacket steam inlet and a lower head jacket steam outlet; the advantage is that the adiponitrile in the system can be recovered and converted into a seminitrile product while the materials are reacting, thereby improving the output and yield of the reaction. Based on the above, although the reactor can be well applied, it is usually not convenient to efficiently stir the medium inside the reaction cylinder, making it difficult for the reaction efficiency of the medium inside the reaction cylinder to reach the established expectations, which often troubles users. Utility Model Content

[0004] The purpose of the utility model is to provide a gas phase reactor for producing adiponitrile from adipic acid, so as to solve the problem that although the reactor proposed in the above background technology can be well applied, it is usually not convenient to efficiently stir the medium inside the reaction cylinder, making it difficult for the reaction efficiency of the medium inside the reaction cylinder to reach the established expectations.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas phase reactor for producing adiponitrile from adipic acid, comprising a reaction cylinder, an upper end cap is arranged at the top of the reaction cylinder, a lower end cap is arranged at the bottom of the reaction cylinder, heating blocks are arranged on both sides of the bottom of the lower end cap, legs with equal spacing are arranged at the edge position of the bottom end of the lower end cap, a transmission box is arranged at the top of the upper end cap, a top frame is arranged on the inner wall of the lower end of the transmission box, a bottom frame is arranged at the bottom of the lower end cap, a driving gear is rotatably installed at the center position of the top of the top frame, A first driven gear is rotatably mounted on the top of the top frame on one side of the driving gear, and the first driven gear is meshed with the driving gear. A second driven gear is rotatably mounted on the top of the top frame on the side of the driving gear away from the first driven gear, and the second driven gear is meshed with the driving gear. A first stirring paddle is rotatably mounted on one side of the top of the bottom frame, and the top of the first stirring paddle is connected to the bottom end of the first driven gear. A second stirring paddle is rotatably mounted on the top of the bottom frame on one side of the first stirring paddle, and the top of the second stirring paddle is connected to the bottom end of the second driven gear.

[0006] Preferably, an air inlet is provided on one side of the top end of the upper head, and the bottom end of the air inlet is connected to the top end of the upper head, so that ammonia gas can be injected into the reaction cylinder through the setting of the air inlet.

[0007] Preferably, a motor is installed at the center position of the top end of the upper head, and the bottom end of the motor extends to the inside of the transmission box and is fixedly connected to the top end of the driving gear, so that the driving gear can be driven to rotate through the setting of the motor.

[0008] Preferably, an exhaust port is provided at the top end of the upper head on one side of the air inlet, and the bottom end of the exhaust port is connected to the top end of the upper head, so that the exhaust gas can be discharged and processed by setting the exhaust port.

[0009] Preferably, a pressure gauge is provided at the top of the upper head on the exhaust port side, and a feeding port is provided at the top of the upper head away from the exhaust port side of the pressure gauge, so that the internal air pressure of the reaction cylinder can be monitored by setting the pressure gauge.

[0010] Preferably, a cover plate is rotatably mounted on the top of the feeding port, and a nut seat is provided on the outer wall of the feeding port through a bracket, so that the feeding port can be opened and closed by setting the cover plate.

[0011] Preferably, a discharge port is provided at the center of the bottom end of the lower head, and the top end of the discharge port is connected to the bottom end of the lower head. The discharge port is provided to discharge the reacted medium inside the reaction cylinder.

[0012] Preferably, a bolt member is threadedly mounted on the top of the nut seat, and the top end of the bolt member passes through the cover plate and is provided with a turning handle, so that the bolt member can be screwed by the setting of the turning handle.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the gas phase reactor for producing adiponitrile from adipic acid not only ensures the reaction efficiency of the reactor to the medium when the reactor is in use, but also ensures the sealing performance of the reactor when the reactor is in use, and ensures the reaction effect of the reactor to the medium when the reactor is in use;

[0014] (1) The driving gear is driven by a motor to rotate. Since the driving gear is meshed with the first driven gear and the second driven gear respectively, the driving gear drives the first driven gear and the second driven gear to rotate, and the first driven gear and the second driven gear respectively drive the first stirring paddle and the second stirring paddle to rotate, so that the second stirring paddle and the first stirring paddle can efficiently stir the medium in the reaction cylinder, thereby ensuring the reaction efficiency of the medium when the reactor is in use;

[0015] (2) By turning the handle to drive one end of the bolt to be screwed into the nut seat, the cover plate can be tightly covered on the top of the feeding port, thereby ensuring the sealing of the reactor during use;

[0016] (3) By arranging a heating block at the bottom of the lower head, the interior of the reaction cylinder can be heated, so that the medium inside the reaction cylinder can undergo a high-temperature reaction, thereby ensuring the reaction effect of the medium when the reactor is in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the second stirring paddle and the first stirring paddle of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the utility model when viewed from above;

[0021] Figure 5 For this utility model Figure 1 Enlarged structural diagram at A in the middle.

[0022] In the figure: 1. reaction cylinder; 2. support leg; 3. upper head; 4. cover plate; 5. motor; 6. air inlet; 7. exhaust port; 8. pressure gauge; 9. feeding port; 10. lower head; 11. heating block; 12. discharge port; 13. transmission box; 14. top frame; 15. driving gear; 16. first driven gear; 17. second driven gear; 18. second stirring paddle; 19. first stirring paddle; 20. bottom frame; 21. nut seat; 22. bolt; 23. handle. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5 The utility model provides an embodiment: a gas phase reactor for producing adiponitrile from adipic acid, comprising a reaction cylinder 1, an upper head 3 is arranged at the top of the reaction cylinder 1, an air inlet 6 is arranged on one side of the top of the upper head 3, and the bottom end of the air inlet 6 is connected to the top of the upper head 3;

[0025] When in use, the air inlet 6 is provided so as to inject ammonia into the reaction cylinder 1;

[0026] An exhaust port 7 is provided at the top of the upper head 3 on one side of the air inlet 6, and the bottom end of the exhaust port 7 is connected to the top end of the upper head 3;

[0027] When in use, the exhaust port 7 is provided so as to discharge the waste gas;

[0028] A pressure gauge 8 is provided at the top of the upper head 3 on the exhaust port 7 side, and a feed port 9 is provided at the top of the upper head 3 on the side of the pressure gauge 8 away from the exhaust port 7;

[0029] When in use, the pressure gauge 8 is set to monitor the internal air pressure of the reaction cylinder 1;

[0030] A cover plate 4 is rotatably mounted on the top of the feed port 9, and a nut seat 21 is provided on the outer wall of the feed port 9 through a bracket;

[0031] When in use, the cover plate 4 is arranged so as to open and close the feeding port 9;

[0032] A bolt member 22 is threadedly mounted on the top of the nut seat 21, and the top end of the bolt member 22 passes through the cover plate 4 and is provided with a turning handle 23;

[0033] When in use, the handle 23 is arranged so as to screw the bolt 22;

[0034] A motor 5 is installed at the center of the top of the upper head 3, and the bottom end of the motor 5 extends to the inside of the transmission box 13 and is fixedly connected to the top of the driving gear 15;

[0035] When in use, the motor 5 is arranged to drive the driving gear 15 to rotate;

[0036] A lower end cap 10 is provided at the bottom end of the reaction cylinder 1, a discharge port 12 is provided at the center of the bottom end of the lower end cap 10, and the top end of the discharge port 12 is connected to the bottom end of the lower end cap 10;

[0037] When in use, the discharge port 12 is provided to discharge the reacted medium inside the reaction cylinder 1;

[0038] A heating block 11 is provided on both sides of the bottom of the lower head 10, and legs 2 with equal spacing are provided at the edge of the bottom of the lower head 10. A transmission box 13 is provided on the top of the upper head 3, and a top frame 14 is provided on the inner wall of the lower end of the transmission box 13. A bottom frame 20 is provided at the bottom of the lower head 10, and a driving gear 15 is rotatably installed at the center position of the top of the top frame 14. A first driven gear 16 is rotatably installed at the top of the top frame 14 on one side of the driving gear 15, and the first driven gear 16 is meshed with the driving gear 15;

[0039] A second driven gear 17 is rotatably mounted on the top of the top frame 14 on the side of the driving gear 15 away from the first driven gear 16, and the second driven gear 17 is meshed with the driving gear 15. A first stirring paddle 19 is rotatably mounted on one side of the top of the bottom frame 20, and the top of the first stirring paddle 19 is connected to the bottom end of the first driven gear 16. A second stirring paddle 18 is rotatably mounted on the top of the bottom frame 20 on the side of the first stirring paddle 19, and the top of the second stirring paddle 18 is connected to the bottom end of the second driven gear 17.

[0040] When the embodiment of the present application is used, adipic acid and the seminitrile product to be converted are first injected into the interior of the reaction cylinder 1 from the feed port 9, and ammonia is injected into the reaction cylinder 1 from the air inlet 6. At this time, the ammonia will contact the adipic acid and the seminitrile product, so that the above-mentioned medium is located inside the reaction cylinder 1 for contact reaction, so that it is dehydrated after the reaction to form adipic dinitrile, and the gas phase product after the reaction can be discharged through the discharge port 12, and the exhaust gas can be discharged from the exhaust port 7. Then, the heating block 11 is set to heat the reaction medium inside the reaction cylinder 1, so that the medium is located inside the reaction cylinder 1 for high-temperature reaction, so as to ensure the reaction effect of adipic acid, and then the handle 23 is rotated to drive one side of the bolt member 22. The end is screwed into the inside of the nut seat 21, so that the cover plate 4 can be tightly covered on the top of the feeding port 9 to ensure the sealing of the reactor. Finally, the motor 5 drives the driving gear 15 to rotate, so that the driving gear 15 drives the first driven gear 16 and the second driven gear 17 to rotate, and the first driven gear 16 and the second driven gear 17 respectively drive the first stirring paddle 19 and the second stirring paddle 18 to rotate, so that the second stirring paddle 18 and the first stirring paddle 19 can efficiently stir the medium inside the reaction cylinder 1 to improve the reaction efficiency of the adipic acid medium. In addition, through the setting of the pressure meter 8, the air pressure inside the reaction cylinder 1 can be monitored and displayed, thereby completing the use of the reactor.

Claims

1. A gas phase reactor for producing adiponitrile from adipic acid, characterized in that: The invention comprises a reaction cylinder (1), wherein an upper end cap (3) is arranged at the top of the reaction cylinder (1), a lower end cap (10) is arranged at the bottom of the reaction cylinder (1), heating blocks (11) are arranged on both sides of the bottom of the lower end cap (10), legs (2) with equal spacing are arranged at the edge of the bottom of the lower end cap (10), a transmission box (13) is arranged at the top of the upper end cap (3), a top frame (14) is arranged on the inner wall of the lower end of the transmission box (13), a bottom frame (20) is arranged at the bottom of the lower end cap (10), a driving gear (15) is rotatably mounted at the center of the top of the top frame (14), and a first gear (20) is rotatably mounted at the top of the top frame (14) on one side of the driving gear (15). A driven gear (16), the first driven gear (16) and the driving gear (15) are meshed with each other, a second driven gear (17) is rotatably mounted on the top of the top frame (14) on the side of the driving gear (15) away from the first driven gear (16), the second driven gear (17) and the driving gear (15) are meshed with each other, a first stirring paddle (19) is rotatably mounted on one side of the top of the bottom frame (20), the top of the first stirring paddle (19) is connected to the bottom end of the first driven gear (16), a second stirring paddle (18) is rotatably mounted on the top of the bottom frame (20) on the side of the first stirring paddle (19), the top of the second stirring paddle (18) is connected to the bottom end of the second driven gear (17).

2. A gas phase reactor for producing adiponitrile from adipic acid according to claim 1, characterized in that: An air inlet (6) is provided on one side of the top end of the upper head (3), and the bottom end of the air inlet (6) is connected to the top end of the upper head (3).

3. A gas phase reactor for producing adiponitrile from adipic acid according to claim 1, characterized in that: A motor (5) is installed at the center position of the top end of the upper head (3), and the bottom end of the motor (5) extends into the interior of the transmission box (13) and is fixedly connected to the top end of the driving gear (15).

4. A gas phase reactor for producing adiponitrile from adipic acid according to claim 2, characterized in that: An exhaust port (7) is provided at the top end of the upper head (3) on one side of the air inlet (6), and the bottom end of the exhaust port (7) is connected to the top end of the upper head (3).

5. A gas phase reactor for producing adiponitrile from adipic acid according to claim 4, characterized in that: A pressure gauge (8) is provided at the top of the upper head (3) on one side of the exhaust port (7), and a feed port (9) is provided at the top of the upper head (3) on the side of the pressure gauge (8) away from the exhaust port (7).

6. A gas phase reactor for producing adiponitrile from adipic acid according to claim 5, characterized in that: A cover plate (4) is rotatably mounted on the top of the feeding port (9), and a nut seat (21) is arranged on the outer wall of the feeding port (9) via a bracket.

7. A gas phase reactor for producing adiponitrile from adipic acid according to claim 1, characterized in that: A discharge port (12) is provided at the center position of the bottom end of the lower head (10), and the top end of the discharge port (12) is connected to the bottom end of the lower head (10).

8. A gas phase reactor for producing adiponitrile from adipic acid according to claim 6, characterized in that: A bolt member (22) is threadedly mounted on the top of the nut seat (21); the top end of the bolt member (22) penetrates the cover plate (4) and is provided with a turning handle (23).

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