Depolymerization prevention device for dicyclopentadiene preparation

Abstract

The utility model discloses a depolymerization prevention device for dicyclopentadiene preparation, which comprises a base and a preparation cylinder fixedly connected to the top of the base through a fixing plate, the top of the preparation cylinder is rotatably connected with a rotating pipe through an opening, and the utility model relates to the technical field of dicyclopentadiene preparation. According to the depolymerization prevention device for dicyclopentadiene preparation, cooling water is introduced into a rotating pipe and added into a curved cooling pipe, heat exchange and cooling are conducted on a preparation barrel through the cooling water in the curved cooling pipe, meanwhile, a motor drives a rotating rod to rotate, and the rotating rod can drive a rotating pipe to rotate through a belt wheel and a belt; the rotating pipe drives the curved cooling pipe to rotate in the preparation cylinder, so that the curved cooling pipe can be in better contact with materials in the preparation cylinder for heat exchange, the interior of the preparation cylinder can be completely cooled, generated dicyclopentadiene is effectively prevented from being depolymerized, and the yield of dicyclopentadiene is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of dicyclopentadiene preparation, in particular to a depolymerization prevention device for dicyclopentadiene preparation. Background Art

[0002] Dicyclopentadiene mainly comes from the C5 fraction of kerosene or petroleum cracking, and can be regarded as a primary raw material, which does not need to be produced through organic synthesis. Since there are many components in the carbon nine fraction with boiling points very close to dicyclopentadiene and methyldicyclopentadiene, high-purity dicyclopentadiene cannot be obtained from the carbon nine fraction by direct distillation. However, since dicyclopentadiene can be decomposed into cyclopentadiene at a certain temperature, cyclopentadiene can be relatively easily separated from other carbon nine fractions. Therefore, the current process for producing dicyclopentadiene from the carbon nine fraction is to use depolymerization separation to obtain cyclopentadiene products, and then dimerize the cyclopentadiene products to produce dicyclopentadiene products.

[0003] In the process of producing dicyclopentadiene products through dimerization of cyclopentadiene products, the dimerization of cyclopentadiene is an exothermic reaction. Therefore, when cyclopentadiene dimerizes, cooling water is needed to cool the polymerization reactor. However, the dimerization process of cyclopentadiene is reversible. If the cyclopentadiene cannot be completely cooled, the dicyclopentadiene will be depolymerized, which will easily affect the yield of dicyclopentadiene. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a depolymerization prevention device for the preparation of dicyclopentadiene, which solves the problem that the dimerization process of cyclopentadiene is reversible. If the cyclopentadiene cannot be completely cooled, it will cause depolymerization of dicyclopentadiene, which is likely to affect the yield of dicyclopentadiene.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a device for preventing depolymerization of dicyclopentadiene preparation, comprising a base and a preparation cylinder fixedly connected to the top of the base by a fixed plate, the top of the preparation cylinder being rotatably connected to a rotating tube by opening an opening, one end of the rotating tube being connected to a curved cooling tube, the bottom of the inner cavity of the preparation cylinder being fixedly connected to the rotating tube, one end of the rotating tube being rotatably connected to one end of the curved cooling tube by a sealed bearing, the surface of the rotating tube being connected to a discharge pipe, one end of the discharge pipe passing through the preparation cylinder and extending to the outside of the preparation cylinder, the rear of the top of the preparation cylinder being fixedly connected to a motor by a fixed frame, the output shaft of the motor being fixedly connected to a rotating rod by a coupling, one end of the rotating rod being rotatably connected to the top of the preparation cylinder by a bearing, the outer surface of the rotating rod and the outer surface of the rotating tube being fixedly connected to pulleys, and a belt being transmission-connected between the outer surfaces of the two pulleys.

[0006] Preferably, a collecting frame and a recycling frame are fixedly connected to the top of the base and located on both sides of the preparation cylinder, and a first liquid pump is fixedly installed on the top of the base and located between the collecting frame and the recycling frame.

[0007] Preferably, the water inlet end of the first liquid pump is connected to an inlet pipe, one end of the inlet pipe passes through the collection frame and extends to the interior of the collection frame, and the water outlet end of the first liquid pump is connected to an outlet pipe, one end of the outlet pipe extends to the interior of the recovery frame.

[0008] Preferably, a second liquid pump is fixedly installed on one side of the top of the preparation cylinder, the water inlet end of the second liquid pump is connected to a liquid inlet pipe, the liquid inlet pipe extends to the interior of the recovery frame, the water outlet end of the second liquid pump is connected to a liquid outlet pipe, one end of the liquid outlet pipe is rotatably connected to the other end of the rotating tube through a sealed bearing.

[0009] Preferably, a mounting plate is fixedly connected to the top of the outer surface of the base, and a stirring rod is rotatably connected to the top of the mounting plate through an opening.

[0010] Preferably, a plurality of stirring blades are fixedly connected to the outer surface of the stirring rod and located inside the collecting frame.

[0011] Beneficial effects

[0012] The utility model provides a device for preventing depolymerization of dicyclopentadiene. Compared with the existing technology, it has the following advantages:

[0013] (1) The utility model allows cooling water to be introduced into the rotating tube, so that the cooling water is added to the curved cooling tube, and the cooling water in the curved cooling tube is used to exchange heat and cool the preparation tube. At the same time, the motor drives the rotating rod to rotate, and the rotating rod drives the rotating tube to rotate through the pulley and the belt. The rotating tube drives the curved cooling tube to rotate in the preparation tube, so that the curved cooling tube can better contact and exchange heat with the material in the preparation tube, thereby completely cooling the preparation tube, effectively preventing the generated dicyclopentadiene from depolymerizing, and ensuring the yield of dicyclopentadiene.

[0014] (2) The utility model can recycle the cooling water well by discharging the cooled cooling water to the collection frame through the discharge pipe and pumping the cooling water into the recovery frame through the first liquid pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the external structure of the utility model;

[0016] Figure 2 This is a cross-sectional view of the base, collection frame and recycling frame structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the preparation cylinder, rotating tube, motor, rotating rod, pulley and belt of the utility model.

[0018] Figure 4 Schematic diagram of the pipeline structure of this utility model.

[0019] In the figure: 1. base; 2. preparation cylinder; 3. rotating tube; 4. curved cooling tube; 5. rotating tube; 6. discharge tube; 7. motor; 8. rotating rod; 9. pulley; 10. belt; 11. collection frame; 12. recovery frame; 13. first liquid pump; 14. water inlet pipe; 15. water outlet pipe; 16. second liquid pump; 17. liquid outlet pipe; 18. mounting plate; 19. stirring rod; 20. stirring blade; 21. transmission wheel; 22. transmission belt; 23. liquid inlet pipe. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] See also Figure 1-4 The present invention provides a technical solution: a device for preventing depolymerization of dicyclopentadiene preparation, comprising a base 1 and a preparation cylinder 2 fixedly connected to the top of the base 1 by a fixed plate, the top of the preparation cylinder 2 and the bottom of the preparation cylinder 2 are respectively connected with a feeding pipe and a discharge pipe, the top of the preparation cylinder 2 is rotatably connected with a rotating pipe 3 through an opening, one end of the rotating pipe 3 is connected with a curved cooling pipe 4, the bottom of the inner cavity of the preparation cylinder 2 is fixedly connected with a rotating pipe 5, one end of the rotating pipe 5 is rotatably connected to one end of the curved cooling pipe 4 through a sealed bearing, the surface of the rotating pipe 5 is connected with a discharge pipe 6, one end of the discharge pipe 6 passes through the preparation cylinder 2 and extends to the outside of the preparation cylinder 2, the rear of the top of the preparation cylinder 2 is fixedly connected with a motor 7 through a fixed frame, the motor 7 is a servo motor, electrically connected to an external power supply, and controlled by a control switch, the output shaft of the motor 7 is fixedly connected to a rotating rod 8 through a coupling, one end of the rotating rod 8 is rotatably connected to the top of the preparation cylinder 2 through a bearing, the outer surface of the rotating rod 8 and the outer surface of the rotating tube 3 are fixedly connected with pulleys 9, and a belt 10 is connected for transmission between the outer surfaces of the two pulleys 9.

[0022] Furthermore, in order to recycle the cooling water, a collecting frame 11 and a recycling frame 12 are fixedly connected to the top of the base 1 and located on both sides of the preparation cylinder 2. A first liquid pump 13 is fixedly installed on the top of the base 1 and located between the collecting frame 11 and the recycling frame 12. The first liquid pump 13 is electrically connected to the external power supply and is controlled by a control switch. The water inlet end of the first liquid pump 13 is connected to a water inlet pipe 14. One end of the water inlet pipe 14 passes through the collecting frame 11 and extends to the interior of the collecting frame 11. The first liquid pump 1 3 is connected to the water outlet end thereof with a water outlet pipe 15, one end of the water outlet pipe 15 extends to the interior of the recovery frame 12, a second liquid pump 16 is fixedly installed on one side of the top of the preparation cylinder 2, the second liquid pump 16 is electrically connected to the external power supply and is controlled by a control switch, the water inlet end of the second liquid pump 16 is connected to the liquid inlet pipe 23, the liquid inlet pipe 23 extends to the interior of the recovery frame 12, the water outlet end of the second liquid pump 16 is connected to the liquid outlet pipe 17, one end of the liquid outlet pipe 17 is rotatably connected to the other end of the rotating tube 3 through a sealed bearing.

[0023] Furthermore, in order to quickly dissipate the heat of the recovered cooling water, a mounting plate 18 is fixedly connected to the top of the outer surface of the base 1, and a stirring rod 19 is rotatably connected to the top of the mounting plate 18 through an opening. A plurality of stirring blades 20 are fixedly connected to the outer surface of the stirring rod 19 and located inside the collecting frame 11.

[0024] During use, cyclopentadiene is added into the preparation cylinder 2, and cooling water is extracted from the recovery frame 12 by controlling the liquid inlet pipe 23 on the second liquid pump 16, and the cooling water is pumped into the rotating tube 3 through the liquid outlet pipe 17. The cooling water is passed into the curved cooling tube 4 through the rotating tube 3. The cooling water in the curved cooling tube 4 will cool the material in the preparation cylinder 2, and the cooling water in the curved cooling tube 4 will be discharged into the collection frame 11 through the rotating tube 5 and the discharge pipe 6. At the same time, the motor 7 is controlled to drive the rotating rod 8 to rotate, and the rotating rod 8 will drive the rotating tube 3 to rotate through the pulley 9 and the belt 10. The rotating tube 3 will drive the curved cooling tube 4 to rotate in the preparation cylinder 2, so that the curved cooling tube 4 can exchange heat and cool the material in the preparation cylinder 2;

[0025] As the rotating tube 3 rotates, the rotating tube 3 drives the stirring rod 19 to rotate through the transmission wheel 21 and the transmission belt 22, and the stirring rod 19 drives the multiple stirring blades 20 to rotate, so that the multiple stirring blades 20 stir and dissipate heat in the collection frame 11;

[0026] After the cyclopentadiene material in the preparation cylinder 2 is cooled, it is discharged through the discharge pipe. After the cooling water in the collection frame 11 is cooled, it is extracted by controlling the water inlet pipe 14 on the first liquid pump 13, and the cooling water is discharged into the recovery frame 12 through the outlet pipe 15 for recycling.

Claims

1. A depolymerization prevention device for preparing dicyclopentadiene, comprising a base (1) and a preparation cylinder (2) fixedly connected to the top of the base (1) via a fixing plate, characterized in that: The top of the preparation cylinder (2) is rotatably connected to a rotating tube (3) through an opening, one end of the rotating tube (3) is connected to a curved cooling tube (4), the bottom of the inner cavity of the preparation cylinder (2) is fixedly connected to a rotating tube (5), one end of the rotating tube (5) is rotatably connected to one end of the curved cooling tube (4) through a sealed bearing, the surface of the rotating tube (5) is connected to a discharge tube (6), one end of the discharge tube (6) passes through the preparation cylinder (2) and extends to the outside of the preparation cylinder (2), the rear of the top of the preparation cylinder (2) is fixedly connected to a motor (7) through a fixed frame, the output shaft of the motor (7) is fixedly connected to a rotating rod (8) through a coupling, one end of the rotating rod (8) is rotatably connected to the top of the preparation cylinder (2) through a bearing, the outer surface of the rotating rod (8) and the outer surface of the rotating tube (3) are both fixedly connected to pulleys (9), and a belt (10) is connected between the outer surfaces of the two pulleys (9).

2. The device for preventing depolymerization of dicyclopentadiene according to claim 1, wherein: A collecting frame (11) and a recycling frame (12) are fixedly connected to the top of the base (1) and located on both sides of the preparation cylinder (2), and a first liquid pump (13) is fixedly installed on the top of the base (1) and located between the collecting frame (11) and the recycling frame (12).

3. The device for preventing depolymerization of dicyclopentadiene according to claim 2, wherein: The water inlet end of the first liquid pump (13) is connected to a water inlet pipe (14), one end of which passes through the collection frame (11) and extends to the interior of the collection frame (11); the water outlet end of the first liquid pump (13) is connected to a water outlet pipe (15), one end of which extends to the interior of the recovery frame (12).

4. The device for preventing depolymerization of dicyclopentadiene according to claim 1, wherein: A second liquid pump (16) is fixedly installed on one side of the top of the preparation cylinder (2), the water inlet end of the second liquid pump (16) is connected to a liquid inlet pipe (23), and the liquid inlet pipe (23) extends to the interior of the recovery frame (12), and the water outlet end of the second liquid pump (16) is connected to a liquid outlet pipe (17), and one end of the liquid outlet pipe (17) is rotatably connected to the other end of the rotating tube (3) through a sealed bearing.

5. The device for preventing depolymerization of dicyclopentadiene according to claim 1, wherein: A mounting plate (18) is fixedly connected to the top of the outer surface of the base (1).

6. The device for preventing depolymerization of dicyclopentadiene according to claim 5, wherein: The top of the mounting plate (18) is rotatably connected to a stirring rod (19) via an opening.

7. The device for preventing depolymerization of dicyclopentadiene according to claim 6, wherein: A plurality of stirring blades (20) are fixedly connected to the outer surface of the stirring rod (19) and located inside the collecting frame (11).

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