Dibenzoylmethane distillation and crystallization device

Abstract

The invention relates to the technical field of dibenzoylmethane production, and discloses a dibenzoylmethane distillation and crystallization device which comprises a distillation tank body and a high-pressure hot air mechanism, a supporting circular ring is arranged at the top of the inner wall of the distillation tank body, and a distillation and equipartition mechanism is supported at the top of the supporting circular ring; according to the dibenzoylmethane distillation and crystallization device, a dibenzoylmethane stock solution is uniformly shunted by arranging a shunting platform and a distillation and equipartition disc, and the shunting platform and the distillation and equipartition disc move downwards through the weight of the stock solution, so that a flow control column is driven to automatically control the flow of the stock solution passing through a flow control cavity; in the stock solution conveying process, through the change of the weight of the stock solution, the distillation equipartition disc and the flow dividing platform can move up and down and rotate, so that the stock solution deviates in the wall hanging direction in the distillation pipe, the stock solution can be uniformly attached to the inner wall of the distillation pipe, and the heating efficiency of the distillation pipe on the stock solution is improved.

Description

Technical Field

[0001] The invention relates to the technical field of dibenzoylmethane production, and more specifically to a dibenzoylmethane distillation and crystallization device. Background Art

[0002] Dibenzoylmethane is an organic compound with a light yellow crystal structure. It is a rhombic flake crystal at room temperature and has a high melting point (about 77-80°C). During its preparation, it is usually made by reaction under the action of a catalyst. The finished product liquid needs to be distilled and then concentrated and purified.

[0003] Existing distillation crystallization devices usually use steam distillation equipment, which heats the stock liquid by introducing it into the evaporation chamber. However, in the existing evaporation structure, the stock liquid is transported from the inside to the outside during the process of being transported to the evaporation tube. The amount of stock liquid entering the distillation tube close to the inner side of the transport platform is larger, while the amount of stock liquid entering the distillation tube far from the transport platform is smaller, resulting in uneven distribution. At the same time, the top of the distillation tube close to the inner side of the transport platform will also be covered by the stock liquid, resulting in the water vapor inside it being blocked by the stock liquid during the discharge process, affecting the evaporation of the water vapor, and also easily causing the water vapor to produce high-pressure splashing on the stock liquid, which requires technical optimization. Summary of the invention

[0004] The invention provides a dibenzoylmethane distillation crystallization device, which solves the technical problem that in the dibenzoylmethane raw liquid distillation crystallization device in the related art, the raw liquid cannot be uniformly transported to the inside of the distillation tube during the diversion process.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A dibenzoylmethane distillation crystallization device comprises a distillation tank body and a high-pressure hot air mechanism, wherein a support ring is arranged on the top of the inner wall of the distillation tank body, a distillation equal distribution mechanism is supported on the top of the support ring, a raw material delivery pipe extending to the inside of the distillation tank body is arranged on the top of the distillation tank body, the raw material delivery pipe is used to deliver dibenzoylmethane stock solution to the top of the distillation equal distribution mechanism, a flow control mechanism is arranged on the output end of the raw material delivery pipe, and the flow control mechanism is connected to the distillation equal distribution mechanism;

[0007] The top of the distillation tank is provided with a preheating box sleeved on the outside of the raw material delivery pipe, and the preheating box is used to preheat the dibenzoylmethane stock solution inside the raw material delivery pipe;

[0008] A plurality of groups of distillation tubes are evenly distributed at the bottom of the distillation and distribution mechanism, and the distillation tubes are used to heat and distill the dibenzoylmethane stock solution;

[0009] The output end of the high-pressure hot air mechanism is provided with a second steam conduit extending to the interior of the distillation tank body, and the second steam conduit transports the high-pressure steam generated by the high-pressure hot air mechanism to the interior of the distillation tank body and heats the distillation tube;

[0010] A first steam conduit is arranged between the bottom of the outer side of the distillation tank body and the input end of the high-pressure hot air mechanism, and the output end of the preheating box body is connected to the first steam conduit. The height of the first steam conduit close to one end of the distillation tank body is lower than that of the end close to the high-pressure hot air mechanism.

[0011] As a further optimization scheme of the present invention, the distillation equal distribution mechanism includes a distillation equal distribution disk arranged on the top of a supporting ring, hinged support rods are evenly arranged on the outer side of the distillation equal distribution disk, a rotating base rotatably connected to the top of the supporting ring is arranged at the bottom of the hinged support rod, a plurality of groups of first support springs connected to the bottom of the distillation equal distribution disk are evenly distributed on the top of the supporting ring, an elastic retaining ring is arranged at the edge position of the top of the distillation equal distribution disk, the edge of the top of the elastic retaining ring is fixedly connected to the inner wall of the distillation tank body, and the elastic retaining ring is used to divide the interior of the distillation tank body into two upper and lower chambers.

[0012] As a further optimization scheme of the present invention, a plurality of groups of limiting sliders are evenly distributed on the outer side of the distillation equalizing disk, a first guide groove adapted to the limiting slider is arranged at the inner wall of the distillation tank body, the first guide groove is an upward inclined structure, a liquid collecting trough is arranged on the inner wall of the distillation tank body at the top of the distillation equalizing disk, the top of the distillation tank body is an arc-shaped slope structure, and the liquid collecting trough is used to collect condensed water on the top of the distillation tank body.

[0013] As a further optimization scheme of the present invention, the top surface of the distillation equalizing disk is evenly provided with diversion flow holes, the top of the distillation tube is connected with the diversion flow holes, the top surface of the distillation equalizing disk is evenly provided with a plurality of groups of flow ring grooves, and a diversion branch is connected between two adjacent groups of flow ring grooves, a diversion platform is provided in the middle of the top of the distillation equalizing disk, a plurality of groups of conveying main pipes are evenly distributed on the outer side of the top of the diversion platform, a limiting connecting rod extending to the inside of the distillation tank body is provided at the other end of the conveying main pipe, and a third guide groove matched with the limiting connecting rod is provided at the inner wall of the distillation tank body, and the third guide groove is a vertical structure.

[0014] As a further optimization scheme of the present invention, the bottom of the limiting connecting rod is provided with a supporting column which is in contact with the top of the distillation equalizing disc, and the bottom of the conveying main pipe is evenly distributed with conveying branch pipes which correspond to the top of the diversion ring groove, and the inner diameter of the conveying branch pipes increases proportionally from the end close to the diversion platform to the end close to the limiting connecting rod, and a connecting column is provided in the middle of the top surface of the diversion platform.

[0015] As a further optimization scheme of the present invention, the flow control mechanism includes a flow control column arranged at the top of the connecting column, the flow control column is located inside the raw material conveying pipe, the inner side of the raw material conveying pipe is provided with a flow control cavity that is compatible with the flow control column, the top of the flow control column is provided with a return spring, and the inner wall of the raw material conveying pipe is provided with an inner support frame fixedly connected to the top of the return spring, and when the flow control column moves downward following the connecting column, the gap between the flow control cavity and the flow control column is continuously reduced.

[0016] As a further optimization scheme of the present invention, a baffle ring is also provided at the edge position of the top of the diversion platform, and the baffle ring is used to block the dibenzoylmethane raw liquid. The diversion platform is suspended at the top position of the distillation equalizing disk through the support of the conveying main pipe, the limiting connecting rod and the supporting column. When the distillation equalizing disk moves upward, it pushes the supporting column to drive the diversion platform to move upward.

[0017] As a further optimization scheme of the present invention, a collecting plate is provided at the bottom of the distillation tube, and a rotating support plate is provided between the bottom of the distillation tube and the collecting plate, the distillation tube can be displaced up and down relative to the rotating support plate, and the rotating support plate can rotate on the top of the collecting plate, and a plurality of groups of supporting sliders are evenly distributed on the outside of the collecting plate, and one end of the supporting slider extends away from the collecting plate to the position of the inner wall of the distillation tank body, and the inner wall of the distillation tank body is provided with a second guide groove that is compatible with the supporting slider, and the second guide groove is a vertical structure, and the upper and lower ends of the supporting slider are provided with second support springs fixedly connected to the second guide groove.

[0018] As a further optimization scheme of the present invention, a concentrated liquid guide pipe extending to the outside of the distillation tank body is provided on the outer side of the collecting plate, and the concentrated liquid guide pipe conducts the dibenzoylmethane concentrated after distillation for cooling and crystallization. A water collecting tank is provided at the bottom of the distillation tank body, and the water collecting tank is used to collect condensed water on the outside of the distillation tube. A third steam conduit connected to a preheating box is provided on the top of the first steam conduit, and the preheating box is sleeved on the outside of the raw material delivery pipe.

[0019] As a further optimization scheme of the present invention, when the distillation tube heats the dibenzoylmethane stock solution inside it, the generated water vapor is transported to the position of the branch flow hole through the top of the distillation tube and discharged upward to the top of the distillation tank body. When the high-pressure hot air mechanism is running, suction is generated on the first steam duct. The outside of the distillation tank body is provided with a water pipe extending into the interior of the distillation tank body and interconnected with the inner side of the liquid collecting tank, and the output end of the water pipe extends to the interior of the water collecting tank.

[0020] The beneficial effects of the present invention are as follows: the present invention is provided with a flow diversion platform and a distillation equalizing disc, so that the dibenzoylmethane stock solution transported to the top of the flow diversion platform through the raw material conveying pipe is evenly diverted, and the flow diversion platform and the distillation equalizing disc are displaced downward by the weight of the stock solution, thereby driving the flow control column to automatically control the flow rate of the stock solution passing through the flow control cavity position, and in the process of stock solution transportation, the distillation equalizing disc and the flow diversion platform can be displaced up and down by the change of the stock solution weight, and the distillation equalizing disc is guided by the first guide groove and the limit slider to drive the distillation tube to rotate, so that the stock solution is offset in the direction of hanging on the wall inside the distillation tube, so that the stock solution can be evenly attached to the inner wall position of the distillation tube, thereby improving the heating efficiency of the distillation tube for the stock solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 is a three-dimensional structural cross-sectional view of the present invention;

[0023] Figure 3 It is an enlarged schematic diagram of the internal structure of the distillation tank body and the preheating box body in the present invention;

[0024] Figure 4 yes Figure 3 A schematic diagram of the structure at A;

[0025] Figure 5 It is an enlarged schematic diagram of the connection structure at the distillation and equal distribution mechanism in the present invention;

[0026] Figure 6 yes Figure 5 A schematic diagram of the structure at B;

[0027] Figure 7 It is an enlarged schematic diagram of the connection structure at the distillation equal-dividing disk in the present invention;

[0028] Figure 8 It is an enlarged schematic diagram of the structure of the hinged support rod in the present invention;

[0029] Fig. 9 It is an enlarged schematic diagram of the connection structure at the diversion platform in the present invention;

[0030] Fig.10 It is an enlarged cross-sectional view of the structure of the flow control mechanism in the present invention;

[0031] Fig.11 It is an enlarged schematic diagram of the structure of the collecting plate in the present invention.

[0032] In the figure: 1, distillation tank; 2, water guide pipe; 3, concentrate guide pipe; 4, water collecting tank; 5, first steam guide pipe; 6, high-pressure hot air mechanism; 7, second steam guide pipe; 8, third steam guide pipe; 9, raw material conveying pipe; 10, preheating box;

[0033] 11. Distillation equalizing disc; 12. Supporting ring; 13. Distillation tube; 14. Collecting disc; 15. Liquid collecting trough; 16. First guide groove; 17. Second guide groove; 18. Third guide groove; 19. Diversion platform; 20. Articulated support rod;

[0034] 21. Limiting slider; 22. First supporting spring; 23. Diverter hole; 24. Diverter branch; 25. Diverter ring groove; 26. Rotating base; 27. Connecting column; 28. Retaining ring; 29. ​​Delivery branch pipe; 30. Support column;

[0035] 31. Limiting connecting rod; 32. Delivery main pipe; 33. Inner support frame; 34. Return spring; 35. Flow control column; 36. Flow control cavity; 37. Support slider; 38. Second support spring; 39. Rotating support plate; 40. Elastic retaining ring. DETAILED DESCRIPTION

[0036] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0037] Example 1

[0038] like Figures 1 to 11 As shown, a dibenzoylmethane distillation crystallization device comprises a distillation tank body 1 and a high-pressure hot air mechanism 6, a support ring 12 is arranged on the top of the inner wall of the distillation tank body 1, a distillation equal distribution mechanism is supported on the top of the support ring 12, a raw material delivery pipe 9 extending to the inside of the distillation tank body 1 is arranged on the top of the distillation tank body 1, the raw material delivery pipe 9 is used to deliver the dibenzoylmethane stock solution to the top of the distillation equal distribution mechanism, a flow control mechanism is arranged on the output end of the raw material delivery pipe 9, and the flow control mechanism is connected to the distillation equal distribution mechanism;

[0039] The distillation equal distribution mechanism includes a distillation equal distribution disc 11 arranged on the top of a support ring 12, and hinged support rods 20 are evenly arranged on the outer side of the distillation equal distribution disc 11, and a rotating base 26 rotatably connected to the top of the support ring 12 is arranged at the bottom of the hinged support rod 20, and a plurality of groups of first support springs 22 interconnected with the bottom of the distillation equal distribution disc 11 are evenly distributed on the top of the support ring 12, and an elastic retaining ring 40 is arranged at the edge position of the top of the distillation equal distribution disc 11, and the edge of the top of the elastic retaining ring 40 is fixedly connected to the inner wall of the distillation tank body 1, and the elastic retaining ring 40 is used to divide the interior of the distillation tank body 1 into two upper and lower chambers, and a plurality of groups of limiting sliders 21 are evenly distributed on the outer side of the distillation equal distribution disc 11, and a first guide groove 16 adapted to the limiting slider 21 is arranged at the inner wall position of the distillation tank body 1, and the first guide groove 16 is an oblique upward structure, and the distillation tank body A liquid collecting trough 15 is arranged on the inner wall at the top of the distillation equal-dividing disc 11. The top of the distillation tank body 1 is an arc-shaped slope structure. The liquid collecting trough 15 is used to collect condensed water on the top of the distillation tank body 1. The top surface of the distillation equal-dividing disc 11 is evenly provided with diversion holes 23. The top of the distillation tube 13 is connected to the diversion holes 23. A plurality of groups of flow ring grooves 25 are evenly arranged on the top surface of the distillation equal-dividing disc 11, and a flow branch 24 is connected between two adjacent groups of flow ring grooves 25. A flow diversion platform 19 is arranged in the middle of the top of the distillation equal-dividing disc 11. A plurality of groups of conveying main pipes 32 are evenly arranged on the outer side of the top of the flow diversion platform 19. The other end of the conveying main pipe 32 is provided with a limit connecting rod 31 extending to the inside of the distillation tank body 1. A third guide groove 18 adapted to the limit connecting rod 31 is arranged at the position of the inner wall of the distillation tank body 1. The third guide groove 18 is a vertical structure.

[0040] A support column 30 is provided at the bottom of the limit connecting rod 31 and is fitted with the top of the distillation equal-dividing disc 11. A delivery branch pipe 29 corresponding to the top of the diverting ring groove 25 is evenly distributed at the bottom of the delivery main pipe 32. The inner diameter of the delivery branch pipe 29 increases proportionally from the end close to the diverting platform 19 to the end close to the limit connecting rod 31. A connecting column 27 is provided in the middle of the top surface of the diverting platform 19.

[0041] The flow control mechanism includes a flow control column 35 arranged at the top of the connecting column 27, the flow control column 35 is located inside the raw material conveying pipe 9, a flow control cavity 36 adapted to the flow control column 35 is arranged on the inner side of the raw material conveying pipe 9, a reset spring 34 is arranged at the top of the flow control column 35, and an inner support frame 33 fixedly connected to the top of the reset spring 34 is arranged at the inner wall position of the raw material conveying pipe 9. When the flow control column 35 moves downward following the connecting column 27, the gap between the flow control cavity 36 and the flow control column 35 is continuously reduced. A retaining ring 28 is also arranged at the edge position of the top of the diversion platform 19. The retaining ring 28 is used to block the dibenzoylmethane raw liquid. The diversion platform 19 is suspended at the top position of the distillation equal-dividing disc 11 through the support of the conveying main pipe 32, the limit connecting rod 31 and the support column 30. When the distillation equal-dividing disc 11 moves upward, the support column 30 is pushed to drive the diversion platform 19 to move upward;

[0042] The top of the distillation tank body 1 is provided with a preheating box body 10 which is sleeved on the outside of the raw material delivery pipe 9. The preheating box body 10 is used to preheat the dibenzoylmethane stock solution inside the raw material delivery pipe 9.

[0043] A plurality of groups of distillation tubes 13 are evenly distributed at the bottom of the distillation equal distribution mechanism, and the distillation tubes 13 are used to heat and distill the dibenzoylmethane stock solution. A collecting plate 14 is arranged at the bottom of the distillation tube 13, and a rotating support plate 39 is arranged between the bottom of the distillation tube 13 and the collecting plate 14. The distillation tube 13 can move up and down relative to the rotating support plate 39, and the rotating support plate 39 can rotate on the top of the collecting plate 14. A plurality of groups of supporting sliders 37 are evenly distributed on the outside of the collecting plate 14, and one end of the supporting slider 37 away from the collecting plate 14 extends to the position of the inner wall of the distillation tank body 1, and the inner wall of the distillation tank body 1 is provided with a first slide block 37 that matches with the supporting slider 37. Two guide grooves 17, the second guide groove 17 is a vertical structure, the upper and lower ends of the support slider 37 are both provided with second support springs 38 fixedly connected to the second guide groove 17, the outer side of the collecting plate 14 is provided with a concentrated liquid guide pipe 3 extending to the outside of the distillation tank body 1, the concentrated liquid guide pipe 3 guides the concentrated dibenzoylmethane after distillation to be cooled and crystallized, the bottom of the distillation tank body 1 is provided with a water collecting tank 4, the water collecting tank 4 is used to collect condensed water outside the distillation pipe 13, the top of the first steam conduit 5 is provided with a third steam conduit 8 interconnected with the preheating box 10, and the preheating box 10 is sleeved on the outer side of the raw material conveying pipe 9;

[0044] The output end of the high-pressure hot air mechanism 6 is provided with a second steam conduit 7 extending to the interior of the distillation tank body 1. The second steam conduit 7 transports the high-pressure steam generated by the high-pressure hot air mechanism 6 to the interior of the distillation tank body 1 and heats the distillation tube 13.

[0045] A first steam duct 5 is arranged between the bottom of the outer side of the distillation tank body 1 and the input end of the high-pressure hot air mechanism 6, and the output end of the preheating box 10 is interconnected with the first steam duct 5. The position height of the first steam duct 5 close to one end of the distillation tank body 1 is lower than that of the end close to the high-pressure hot air mechanism 6. When the distillation tube 13 heats the dibenzoylmethane stock solution inside it, the generated water vapor is transported to the position of the branch flow hole 23 through the top of the distillation tube 13 and discharged upward to the top of the distillation tank body 1. When the high-pressure hot air mechanism 6 is running, suction is generated on the first steam duct 5. A water conduit 2 extending into the interior of the distillation tank body 1 and interconnected with the inner side of the liquid collecting tank 15 is arranged on the outer side of the distillation tank body 1, and the output end of the water conduit 2 extends to the interior of the water collecting tank 4.

[0046] The use process of the dibenzoylmethane distillation crystallization device proposed in this embodiment is as follows: when the distillation crystallization device is in use, it is connected to the external dibenzoylmethane stock solution conveying equipment through the raw material conveying pipe 9, and the high-pressure hot air mechanism 6 is started to preheat the interior of the distillation tank body 1, so that the distillation tube 13 is heated to a predetermined temperature. During the heating process of the distillation tube 13, condensed water will be generated on the outside of the distillation tube 13, and the condensed water will gather and then fall to the position of the water collecting tank 4;

[0047] After the preheating of the distillation tube 13 is completed, the dibenzoylmethane stock solution is transported to the top of the diversion platform 19 through the raw material delivery pipe 9. At this time, the dibenzoylmethane stock solution enters the interior of the delivery main pipe 32 through the top of the diversion platform 19, and is then transported to the position of the delivery branch pipe 29 through the delivery branch pipe 29. The dibenzoylmethane stock solution is introduced into the interior of the corresponding diversion annular groove 25 through the delivery branch pipe 29, and is further transported to the position of the diversion flow hole 23 through the diversion annular groove 25. At this time, the stock solution slides downward along the inner wall of the diversion flow hole 23 to the inner wall position of the distillation tube 13, and the dibenzoylmethane stock solution is distilled by the high temperature of the distillation tube 13;

[0048] During the downward sliding of the dibenzoylmethane stock solution, the weight of the stock solution itself will exert downward pressure on the diversion platform 19, the distillation equal-dividing disc 11 and the distillation tube 13, so that the distillation equal-dividing disc 11 moves downward as a whole. At this time, the limiting slider 21 on the outer side of the distillation equal-dividing disc 11 is driven by the limiting guiding action of the first guide groove 16 to drive the distillation equal-dividing disc 11 to rotate and move, while the stock solution on the inner side of the distillation tube 13 still moves vertically downward under the action of its own gravity. The rotation of the distillation tube 13 enables the stock solution to be evenly attached to the inner wall of the distillation tube 13 during the downward sliding process, thereby achieving the effect of uniform coating, so that the stock solution is more efficient during the distillation process on the inner wall of the distillation tube 13.

[0049] As the flow-dividing platform 19 moves downward, the flow-controlling column 35 on the top of the connecting column 27 moves downward synchronously, so that the flow-controlling column 35 is close to the flow-controlling cavity 36, and the distance between the two is reduced, so that the flow rate of the dibenzoylmethane stock solution delivered to the top of the flow-dividing platform 19 through the raw material delivery pipe 9 is reduced, so that the amount of the dibenzoylmethane stock solution remaining on the flow-dividing platform 19, the distillation equalizing disc 11 and the distillation tube 13 is reduced, and as the distillation continues, the dibenzoylmethane concentrate after distillation is collected in the collecting disc 14, and is led out through the water guide pipe 2 for cooling and crystallization;

[0050] The amount of dibenzoylmethane stock solution on the distillation equal-dividing disc 11, the diverting platform 19 and the distillation tube 13 is reduced, so that the pressure on them is reduced. Under the action of the rebound force of the reset spring 34, the first support spring 22 and the second support spring 38, the distillation equal-dividing disc 11, the distillation tube 13 and the diverting platform 19 are displaced upward again as a whole, thereby driving the flow control column 35 to displace upward, so that the flow passage of the flow control cavity 36 is expanded, the flow rate of the dibenzoylmethane stock solution is increased, and the automatic adjustment of the flow rate is realized. In addition, during the adjustment process, the coating effect of the dibenzoylmethane stock solution inside the distillation tube 13 is improved, and the existing natural coating state is optimized.

[0051] In the process of the distillation tube 13 moving up and down and following the rotation, the distillation tube 13 drives the rotating support plate 39 to move up and down, thereby driving the collecting plate 14 to move up and down, and the rotating support plate 39 is driven by the distillation tube 13 to rotate relative to the collecting plate 14;

[0052] The dibenzoylmethane stock solution on the inner wall is distilled through the distillation tube 13, and the water vapor after distillation moves upward through the inside of the distillation tube 13 and is discharged from the position of the branch flow hole 23. The water vapor discharged through the branch flow hole 23 enters the top area of ​​the distillation tank body 1, and further preheats the dibenzoylmethane stock solution inside the raw material conveying pipe 9 through the preheating box 10, thereby improving the utilization rate of heat;

[0053] Furthermore, after the raw material delivery pipe 9 is preheated by the hot steam inside the preheating box 10, it is guided to the position of the first steam pipe 5 through the third steam pipe 8, and the hot steam passing through the outer side of the distillation pipe 13 is transported to the position of the high-pressure hot air mechanism 6 through the first steam pipe 5, and is reheated and transported to the inside of the distillation tank body 1 by the high-pressure hot air mechanism 6, thereby realizing the preheating function of the dibenzoylmethane stock solution and improving the utilization rate of heat;

[0054] It should be noted that the high-pressure hot air mechanism 6 is any conveying and heating equipment in the prior art, and its working principle and technical characteristics are not described in detail.

[0055] The specific implementation methods of this embodiment are described above, but this embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms inspired by this embodiment, all of which are within the protection of this embodiment.

Claims

1. A dibenzoylmethane distillation and crystallization device, characterized in that: The invention comprises a distillation tank body (1) and a high-pressure hot air mechanism (6), wherein a support ring (12) is arranged on the top of the inner wall of the distillation tank body (1), and the top of the support ring (12) supports the distillation equal distribution mechanism, and a raw material delivery pipe (9) extending to the inside of the distillation tank body (1) is arranged on the top of the distillation tank body (1), and the raw material delivery pipe (9) is used to deliver dibenzoylmethane stock solution to the top of the distillation equal distribution mechanism, and a flow control mechanism is arranged on the output end of the raw material delivery pipe (9), and the flow control mechanism is connected to the distillation equal distribution mechanism; A preheating box (10) is provided on the top of the distillation tank (1) and is sleeved on the outside of the raw material delivery pipe (9). The preheating box (10) is used to preheat the dibenzoylmethane stock solution inside the raw material delivery pipe (9); A plurality of groups of distillation tubes (13) are evenly distributed at the bottom of the distillation and equal distribution mechanism, and the distillation tubes (13) are used to heat and distill the dibenzoylmethane stock solution; The output end of the high-pressure hot air mechanism (6) is provided with a second steam conduit (7) extending into the interior of the distillation tank body (1), and the second steam conduit (7) transports the high-pressure steam generated by the high-pressure hot air mechanism (6) into the interior of the distillation tank body (1) and heats the distillation tube (13); A first steam conduit (5) is provided between the bottom of the outer side of the distillation tank body (1) and the input end of the high-pressure hot air mechanism (6); the output end of the preheating box body (10) is connected to the first steam conduit (5); and the height of the first steam conduit (5) close to one end of the distillation tank body (1) is lower than that of the other end close to the high-pressure hot air mechanism (6).

2. A dibenzoylmethane distillation and crystallization device according to claim 1, characterized in that, The distillation equal distribution mechanism comprises a distillation equal distribution disc (11) arranged on the top of a support ring (12); the outer side of the distillation equal distribution disc (11) is evenly provided with hinged support rods (20); the bottom of the hinged support rod (20) is provided with a rotating base (26) rotatably connected to the top of the support ring (12); the top of the support ring (12) is evenly distributed with a plurality of groups of first support springs (22) interconnected with the bottom of the distillation equal distribution disc (11); an elastic retaining ring (40) is provided at the edge position of the top of the distillation equal distribution disc (11); the edge of the top of the elastic retaining ring (40) is fixedly connected to the inner wall of the distillation tank body (1); and the elastic retaining ring (40) is used to separate the interior of the distillation tank body (1) into two upper and lower chambers.

3. A dibenzoylmethane distillation and crystallization device according to claim 2, characterized in that, A plurality of groups of limit sliders (21) are evenly distributed on the outer side of the distillation equal distribution disc (11); a first guide groove (16) adapted to the limit slider (21) is provided at the inner wall of the distillation tank body (1); the first guide groove (16) is an upwardly inclined structure; a liquid collecting trough (15) is provided on the inner wall of the distillation tank body (1) at the top of the distillation equal distribution disc (11); the top of the distillation tank body (1) is an arc-shaped slope structure; the liquid collecting trough (15) is used to collect condensed water at the top of the distillation tank body (1).

4. A dibenzoylmethane distillation and crystallization device according to claim 3, characterized in that, The top surface of the distillation equalizing disc (11) is evenly provided with diversion holes (23), the top of the distillation tube (13) is connected to the diversion holes (23), the top surface of the distillation equalizing disc (11) is evenly provided with a plurality of groups of flow ring grooves (25), and a diversion branch (24) is connected between two adjacent groups of flow ring grooves (25), a diversion platform (19) is provided in the middle of the top of the distillation equalizing disc (11), a plurality of groups of conveying main pipes (32) are evenly distributed on the outer side of the top of the diversion platform (19), the other end of the conveying main pipe (32) is provided with a limit connecting rod (31) extending to the inside of the distillation tank body (1), and a third guide groove (18) adapted to the limit connecting rod (31) is provided at the position of the inner wall of the distillation tank body (1), and the third guide groove (18) is a vertical structure.

5. A dibenzoylmethane distillation and crystallization device according to claim 4, characterized in that, The bottom of the limiting connecting rod (31) is provided with a supporting column (30) which is in contact with the top of the distillation equalizing disc (11), and the bottom of the conveying main pipe (32) is evenly distributed with conveying branch pipes (29) which correspond to the top of the diversion ring groove (25). The inner diameter of the conveying branch pipe (29) increases proportionally from the end close to the diversion platform (19) to the end close to the limiting connecting rod (31), and a connecting column (27) is provided in the middle of the top surface of the diversion platform (19).

6. A dibenzoylmethane distillation and crystallization device according to claim 5, characterized in that: The flow control mechanism comprises a flow control column (35) arranged at the top end of the connecting column (27), the flow control column (35) being located inside the raw material conveying pipe (9), the inner side of the raw material conveying pipe (9) being provided with a flow control cavity (36) which is compatible with the flow control column (35), the top end of the flow control column (35) being provided with a return spring (34), and an inner support frame (33) fixedly connected to the top end of the return spring (34) being provided at the inner wall position of the raw material conveying pipe (9), and when the flow control column (35) moves downward following the connecting column (27), the gap between the flow control cavity (36) and the flow control column (35) is continuously reduced.

7. A dibenzoylmethane distillation and crystallization device according to claim 6, characterized in that: A retaining ring (28) is also provided at the edge of the top of the diversion platform (19), and the retaining ring (28) is used to block the dibenzoylmethane stock solution. The diversion platform (19) is suspended at the top of the distillation equalizing disc (11) through the support of the conveying main pipe (32), the limit connecting rod (31) and the supporting column (30). When the distillation equalizing disc (11) moves upward, it pushes the supporting column (30) to drive the diversion platform (19) to move upward.

8. A dibenzoylmethane distillation and crystallization device according to claim 7, characterized in that: A collecting plate (14) is arranged at the bottom of the distillation tube (13); a rotating support plate (39) is arranged between the bottom of the distillation tube (13) and the collecting plate (14); the distillation tube (13) can move up and down relative to the rotating support plate (39); the rotating support plate (39) can rotate on the top of the collecting plate (14); a plurality of groups of supporting sliders (37) are evenly distributed on the outer side of the collecting plate (14); one end of the supporting slider (37) away from the collecting plate (14) extends to the position of the inner wall of the distillation tank body (1); the inner wall of the distillation tank body (1) is provided with a second guide groove (17) that is mutually compatible with the supporting slider (37); the second guide groove (17) is a vertical structure; and upper and lower ends of the supporting slider (37) are provided with second supporting springs (38) that are fixedly connected to the second guide groove (17).

9. A dibenzoylmethane distillation and crystallization device according to claim 8, characterized in that: The outer side of the collecting plate (14) is provided with a concentrated liquid guide pipe (3) extending to the outside of the distillation tank body (1), and the concentrated liquid guide pipe (3) guides out the dibenzoylmethane concentrated after distillation for cooling and crystallization. The bottom of the distillation tank body (1) is provided with a water collecting tank (4), and the water collecting tank (4) is used to collect condensed water outside the distillation pipe (13). The top of the first steam conduit (5) is provided with a third steam conduit (8) which is interconnected with the preheating box (10), and the preheating box (10) is sleeved on the outer side of the raw material conveying pipe (9).

10. A dibenzoylmethane distillation and crystallization device according to claim 9, characterized in that: When the distillation tube (13) heats the dibenzoylmethane stock solution therein, the generated water vapor is transported through the top of the distillation tube (13) to the position of the branch flow hole (23) and is discharged upward to the top of the distillation tank body (1). When the high-pressure hot air mechanism (6) is in operation, suction is generated on the first steam conduit (5). The outside of the distillation tank body (1) is provided with a water guide pipe (2) extending into the inside of the distillation tank body (1) and communicating with the inside of the liquid collecting tank (15). The output end of the water guide pipe (2) extends into the inside of the water collecting tank (4).

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