Rectifying tower for refining cyclohexanone

Abstract

The utility model relates to the technical field of cyclohexanone production devices, in particular to a rectifying tower for refining cyclohexanone, which comprises a tower body, an exhaust pipe is arranged at the top of the tower body, a liquid discharge pipe is arranged at the bottom of the tower body, the upper side of the tower body is communicated with a liquid inlet pipe, and the outlet end of the liquid inlet pipe is fixedly communicated with a liquid phase distributor. The lower side of the tower body is communicated with a gas inlet pipe, the outlet end of the gas inlet pipe is fixedly communicated with a gas phase distributor, and the tower is characterized in that a plurality of groups of packing components which are arranged at intervals in the vertical direction are arranged in the tower body, and a plurality of groups of wall flow prevention devices which are arranged in a manner of crossing with the packing components are arranged in the tower body.

Description

Technical Field

[0001] The utility model relates to the technical field of cyclohexanone production devices, in particular to a distillation tower for cyclohexanone refining. Background Art

[0002] Cyclohexanone is an organic compound, a colorless, transparent liquid with an earthy odor. When it contains trace amounts of phenol, it has a minty flavor. Impure forms are pale yellow, but over time, impurities form, leading to a watery white to grayish-yellow color. It has a strong, pungent odor and is primarily used industrially as a raw material and solvent for organic synthesis. Distillation towers are often used for purification during cyclohexanone production.

[0003] In the current distillation tower process for refining cyclohexanone, as the liquid in the distillation tower flows downward along the packing layer, it tends to concentrate toward the tower wall, gradually increasing the liquid flow rate at the tower wall and causing wall flow. This wall flow phenomenon can cause uneven distribution of the gas and liquid phases in the packing area, thereby affecting mass transfer efficiency and reducing the distillation effect. Furthermore, the uniformity of the liquid after passing through the upper packing decreases, necessitating redistribution. However, existing redistribution devices have limited effectiveness. Therefore, this application proposes a distillation tower for refining cyclohexanone to improve the above-mentioned problems. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a distillation tower for cyclohexanone purification, and the technical solution to the problem is as follows: comprising a tower body, an exhaust pipe is arranged on the top of the tower body, a liquid discharge pipe is arranged at the bottom of the tower body, a liquid inlet pipe is connected to the upper side of the tower body, the outlet end of the liquid inlet pipe is fixedly connected to a liquid phase distributor, and an air inlet pipe is connected to the lower side of the tower body, the outlet end of the air inlet pipe is fixedly connected to a gas phase distributor, and the utility model is characterized in that a plurality of groups of packing members arranged at intervals along the vertical direction are arranged inside the tower body, and a plurality of groups of wall flow prevention devices arranged crosswise with the packing members are arranged inside the tower body;

[0005] The cam is connected with the bottom end of the tower body, and the cam is connected with the bottom end of the tower body to form a circle, and the cam is connected with the bottom end of the tower body to form a circle.

[0006] The upper end of the redistribution bucket is fixedly connected with a first protective cover for covering the vertical axis.

[0007] Preferably, the driving device includes a power shaft arranged perpendicular to the vertical axis, the two ends of the power shaft are rotatably connected to the first protective cover and the side wall of the tower body respectively, the power shaft is coaxially fixedly connected to an active bevel gear meshing with the driven bevel gear near one end of the vertical axis, the outer wall of the tower body is fixedly connected to a mounting seat, the mounting seat is fixedly connected to a motor for driving the power shaft, and the first protective cover and the inner wall of the tower body are jointly fixedly connected to a second protective cover arranged on the outside of the power shaft.

[0008] Preferably, each of the filling components comprises a support frame fixedly connected to the inner wall of the tower body, the support frame is filled with fillers, and a pressure frame fixedly connected to the inner wall of the tower body is arranged above the fillers.

[0009] The beneficial effects of the utility model are:

[0010] 1. When the present application is in use, the liquid phase enters the tower body through the liquid inlet pipe and is evenly distributed downward through the liquid phase distributor, while the gas phase enters the tower body through the gas inlet pipe and is evenly distributed upward through the gas phase distributor, thereby causing the gas and liquid phases to pass through the packing components in a countercurrent manner, thereby causing the gas and liquid phases to transfer mass on the packing surface, thereby achieving the distillation of cyclohexanone. During the distillation process, in order to prevent wall flow after the liquid passes through the packing, an anti-wall flow device is provided. When the liquid passes through the packing, the receiving groove below the packing will catch the liquid that flows down the side wall of the tower body after passing through the packing, preventing the liquid from concentrating and continuing to flow down the side wall of the tower body, causing wall flow.

[0011] 2. Furthermore, the receiving groove is arranged in the tower body through the installation sleeve, and the inner diameter of the receiving groove is larger than the inner diameter of the tower body, so that the inner wall of the tower body can correspond to the middle of the receiving groove, effectively improving the receiving effect of the receiving groove on the liquid, and a convex edge corresponding to the receiving groove is arranged on the tower body. The relatively protruding convex edge can effectively guide the liquid to flow along the inner wall of the tower body to the receiving groove, and prevent it from spreading along the inner wall of the tower body to the upper side wall of the installation sleeve.

[0012] 3. The liquid entering the receiving tank can enter the redistribution bucket through the guide pipe for redistribution. The vertical shaft can rotate under the drive of the drive device. The rotation of the vertical shaft will drive the redistribution body below the redistribution bucket to rotate. Then, when the liquid in the redistribution bucket flows outward through the redistribution holes on the redistribution body, the rotation of the redistribution body can make the liquid evenly spread to the surrounding areas, thereby facilitating the liquid to be evenly distributed downward again. In addition, the rotation of the vertical shaft will also drive the rotation of the scraper, which can effectively clean the liquid attached to the side wall of the tower body, preventing the liquid from sticking to the wall and causing wall flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a full-section front view of the utility model.

[0014] Figure 2 For this utility model Figure 1 Magnified view of area A in center.

[0015] Figure 3 For this utility model Figure 1 Magnified view of area B.

[0016] Figure 4 This is a partial three-dimensional cross-sectional view of the utility model from the first perspective.

[0017] Figure 5 For this utility model Figure 4 Magnified view of area C in the middle.

[0018] Figure 6 For this utility model Figure 5 Magnified view of area D in the middle.

[0019] Figure 7 This is a partial three-dimensional cross-sectional view of the utility model from a second viewing angle.

[0020] Figure 8 This is a three-dimensional view from the third perspective of the present invention.

[0021] Reference numerals

[0022] 1. Tower body, 2. Exhaust pipe, 3. Drain pipe, 4. Liquid inlet pipe, 5. Liquid phase distributor, 6. Inlet pipe, 7. Gas phase distributor, 8. Packing component, 9. Anti-wall flow device, 10. Mounting sleeve, 11. Receiving groove, 12. Raised edge, 13. Guide pipe, 14. Redistribution bucket, 15. Redistribution body, 16. Redistribution hole, 17. Vertical shaft, 18. Cross bar, 19. Scraper, 20. Driven bevel gear, 21. First protective cover, 22. Power shaft, 23. Driving bevel gear, 24. Mounting seat, 25. Motor, 26. Second protective cover, 27. Support frame, 28. Packing, 29. Press frame. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-8 The specific implementation methods of the present invention are further described in detail.

[0024] In the first embodiment, the technical solution is as follows: when the present application is in use, the liquid phase enters the tower body 1 through the liquid inlet pipe 4 and is uniformly distributed downward through the liquid phase distributor 5, while the gas phase enters the tower body through the gas inlet pipe 6 and is uniformly distributed upward through the gas phase distributor 7, thereby causing the gas and liquid phases to pass through the packing member 8 in a countercurrent manner, thereby causing the gas and liquid phases to transfer mass on the surface of the packing 28, thereby achieving the distillation of cyclohexanone. During the distillation process, in order to prevent the liquid from flowing through the packing 28 and causing wall flow, a wall flow prevention device 9 is provided. When the liquid passes through the packing 28, the receiving groove 11 below the packing 28 will catch the liquid that flows down the side wall of the tower body 1 after passing through the packing 28, preventing the liquid from concentrating and continuing to flow down the side wall of the tower body 1 and causing wall flow.

[0025] Furthermore, the receiving groove 11 is arranged in the tower body 1 through the installation sleeve 10, and the inner diameter of the receiving groove 11 is larger than the inner diameter of the tower body 1, so that the inner wall of the tower body 1 can correspond to the middle of the receiving groove 11, effectively improving the receiving effect of the receiving groove 11 on the liquid, and a convex edge 12 corresponding to the receiving groove 11 is arranged on the tower body 1. The relatively protruding convex edge 12 can effectively guide the liquid to flow along the inner wall of the tower body 1 to the receiving groove 11, and prevent it from spreading along the inner wall of the tower body 1 to the upper side wall of the installation sleeve 10.

[0026] The liquid entering the receiving tank 11 can enter the redistribution bucket 14 through the guide pipe 13 for redistribution. The vertical shaft 17 can rotate under the drive of the driving device. The rotation of the vertical shaft 17 will drive the redistribution body 15 below the redistribution bucket 14 to rotate. Then, when the liquid in the redistribution bucket 14 flows outward through the redistribution holes 16 on the redistribution body 15, the rotation of the redistribution body 15 can make the liquid evenly spread to the surroundings, thereby facilitating the liquid to be evenly distributed downward again. In addition, the rotation of the vertical shaft 17 will also drive the scraper 19 to rotate, which can effectively clean the liquid attached to the side wall of the tower body 1, preventing the liquid from sticking to the wall and causing wall flow.

[0027] Example 2. Based on Example 1, specifically, when the present application is in use, the filler 28 is filled between the support frame 27 and the pressure frame 29 to form a filler component 8. The specific material of the filler 28 can be selected according to the existing types. This application will not describe it in detail. The filler component 8 facilitates full contact and mass transfer between the gas and liquid phases, thereby completing the distillation treatment of cyclohexanone. After the treatment is completed, the gas phase can be discharged through the exhaust pipe 2 at the top of the tower body 1, and the liquid phase can be discharged through the drain pipe 3 at the bottom of the tower body 1.

[0028] Vertical shaft 17 requires a drive mechanism to operate. Specifically, motor 25 on mounting bracket 24 is activated, which drives power shaft 22 to rotate. This rotation of power shaft 22 then rotates driving bevel gear 23, which in turn drives vertical shaft 17 via driven bevel gear 20. This rotation of vertical shaft 17 also drives redistribution body 15, evenly distributing liquid passing through redistribution holes 16. This rotation also drives scraper 19 via crossbar 18.

[0029] Embodiment 3, based on embodiment 2, the first protective cover 21 and the second protective cover 26 can protect transmission components such as the vertical shaft 17, the power shaft 22, the driving bevel gear 23 and the driven bevel gear 20, thereby preventing them from being corroded by gas-liquid two-phase for a long time and ensuring their service life.

Claims

1. A distillation tower for cyclohexanone purification, comprising a tower body (1), an exhaust pipe (2) arranged at the top of the tower body (1), a liquid discharge pipe (3) arranged at the bottom of the tower body (1), a liquid inlet pipe (4) connected to the upper side of the tower body (1), an outlet end of the liquid inlet pipe (4) fixedly connected to a liquid phase distributor (5), a gas inlet pipe (6) connected to the lower side of the tower body (1), an outlet end of the gas inlet pipe (6) fixedly connected to a gas phase distributor (7), characterized in that: Arranged inside the tower body (1) are multiple groups of filler members (8) arranged at intervals in the vertical direction, and arranged inside the tower body (1) are multiple groups of wall flow prevention devices (9) arranged in a cross-arrangement with the filler members (8); Each group of the wall flow prevention devices (9) includes a mounting sleeve (10) coaxial with the tower body, the inner diameter of the mounting sleeve (10) is larger than the inner diameter of the tower body (1), the mounting sleeve (10) is coaxially fixedly connected to a receiving groove (11), the tower body (1) is integrally arranged with a convex edge (12) corresponding to the receiving groove (11), the bottom of the receiving groove (11) is fixedly connected to the inlet ends of two symmetrically arranged guide pipes (13), the outlet ends of the two guide pipes (13) are fixedly connected to a funnel-shaped redistribution bucket (14), the redistribution bucket (14) is coaxially arranged with the tower body (1), and the redistribution bucket (14) is fixedly connected to the tower body (1). The outlet end is rotatably connected to a redistribution body (15), and redistribution holes (16) are evenly distributed around the redistribution body (15). The upper end of the redistribution bucket is coaxially rotatably connected to the upper part of the vertical shaft (17). The redistribution body (15) is coaxially fixedly connected to the lower part of the vertical shaft (17). The lower end of the vertical shaft (17) is fixedly connected to a crossbar (18). The crossbar (18) is fixedly connected to two scrapers (19) arranged symmetrically and abutting against the inner wall of the tower body (1). The upper end of the vertical shaft (17) is coaxially fixedly connected to a driven bevel gear (20), and the tower body (1) is connected to a driving device for driving the driven bevel gear (20); A first protective cover (21) for covering the vertical shaft (17) is fixedly connected to the upper end of the redistribution bucket (14).

2. A distillation tower for cyclohexanone purification according to claim 1, characterized in that: The driving device comprises a power shaft (22) arranged perpendicular to the vertical axis (17), the two ends of the power shaft (22) being rotatably connected to the first protective cover (21) and the side wall of the tower body (1), respectively; the end of the power shaft (22) close to the vertical axis (17) is coaxially fixedly connected to a driving bevel gear (23) meshing with the driven bevel gear (20); the outer wall of the tower body (1) is fixedly connected to a mounting seat (24); the mounting seat (24) is fixedly connected to a motor (25) for driving the power shaft (22); the first protective cover (21) and the inner wall of the tower body (1) are fixedly connected to a second protective cover (26) arranged on the outside of the power shaft (22).

3. A distillation tower for cyclohexanone purification according to claim 1, characterized in that: Each of the packing components (8) comprises a support frame (27) fixedly connected to the inner wall of the tower body (1); the support frame (27) is filled with packing (28); and a pressure frame (29) fixedly connected to the inner wall of the tower body (1) is arranged above the packing (28).

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