THF (tetrahydrofuran) recovery and crude product separation integrated equipment of crude distillation kettle

Abstract

The utility model relates to the field of THF recovery, and discloses a crude distillation kettle THF recovery and crude product separation integrated device which comprises a crude distillation kettle main body and a THF solution receiving tank located on one side of the crude distillation kettle main body, supporting legs are fixedly installed at the bottom of the crude distillation kettle main body, a feeding pipe is fixedly installed at the top of the crude distillation kettle main body, and the THF solution receiving tank is located on the other side of the crude distillation kettle main body. An end cover is mounted at the top of the feeding pipe through threads. Compared with the prior art, the THF recovery device has the following advantages and effects that THF in a THF-containing crude product can be rapidly and comprehensively extracted in a steam form and condensed into a solution to be recycled through cooperative operation of the heating and stirring mechanism and the condensation mechanism, meanwhile, separation of the crude product is achieved, the THF recovery efficiency and the crude product separation efficiency are greatly improved, and the production cost is reduced. The THF recovery process and the crude product separation process are integrated, so that intermediate links are reduced, loss and pollution caused by multiple times of material transfer in a traditional separation method are avoided, and the separation efficiency and the product quality are further improved.

Description

Technical Field

[0001] This application relates to the field of THF recovery technology, and in particular to an integrated device for THF recovery and crude product separation in a crude steaming vessel. Background Technology

[0002] Tetrahydrofuran (THF), also known as oxacyclopentane or 1,4-epoxybutane, is a heterocyclic organic compound. THF is commonly used as a solvent in organic synthesis and polymer material preparation. After the reaction, THF needs to be recovered and separated from the crude product to improve production quality and reduce production costs. Currently, the principle of THF recovery and separation from the crude product is as follows: utilizing the difference in boiling points between THF and other components in the crude product, the mixture in the crude distillation vessel is heated, causing THF and other volatile components to vaporize into steam, while the high-boiling-point components in the crude product remain at the bottom of the vessel, thus achieving preliminary separation. The vaporized steam rises to the top of the crude distillation vessel and enters a condenser. In the condenser, the steam liquefies upon cooling and is collected as the THF recovery liquid.

[0003] In related technologies, the operation of THF recovery and crude product separation is usually carried out using two different devices, which often requires multiple material transfers, easily causing losses and pollution, affecting separation efficiency and product quality. Moreover, during the THF recovery process, the heating of the crude product containing THF is not uniform and comprehensive enough, which reduces the quality and efficiency of THF recovery.

[0004] Therefore, we propose an integrated device for THF recovery and crude product separation in a crude steaming vessel to solve the above problems. Utility Model Content

[0005] The purpose of this application is to provide an integrated device for THF recovery and crude product separation in a crude steaming vessel. This device can quickly and comprehensively extract THF from crude products containing THF in the form of steam and condense it into a solution for recovery, while simultaneously separating the crude product, thus greatly improving the efficiency of THF recovery and crude product separation.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: an integrated device for THF recovery and crude product separation in a crude steaming vessel, comprising a crude steaming vessel body and a THF solution receiving tank located on one side of the crude steaming vessel body. Support legs are fixedly installed at the bottom of the crude steaming vessel body, and a feeding pipe is fixedly installed at the top of the crude steaming vessel body. An end cap is threaded onto the top of the feeding pipe. A crude product discharge pipe is fixedly installed at the bottom front side of the crude steaming vessel body, and an electromagnetic discharge valve is fixedly installed on the crude product discharge pipe. A heating and stirring mechanism is provided on the crude steaming vessel body. This is used to stir the crude product containing THF inside the main body of the crude steaming vessel. The THF solution receiving tank is fixedly installed on one side of the outer wall of the main body of the crude steaming vessel by a bracket. A steam extraction pump for extracting THF vapor is fixedly installed on the top of the main body of the crude steaming vessel. The suction end of the steam extraction pump is fixedly connected to a steam extraction pipe, one end of which extends into the main body of the crude steaming vessel. The discharge end of the steam extraction pump is fixedly connected to a steam delivery pipe, one end of which extends into the THF solution receiving tank. A condensation mechanism is provided on the THF solution receiving tank to condense the THF vapor into a THF solution.

[0007] A further configuration of this application is as follows: the heating and stirring mechanism includes a hollow vertical shaft, an isolation block, multiple serpentine heat-conducting pipes, a steam inlet pipe, a steam outlet pipe, and a drive assembly. The hollow vertical shaft is rotatably installed inside the main body of the coarse steaming kettle, with both its top and bottom extending outside the main body. The isolation block is fixedly installed inside the hollow vertical shaft. Multiple serpentine heat-conducting pipes are all fixedly installed inside the hollow vertical shaft and located within the main body of the coarse steaming kettle. The multiple serpentine heat-conducting pipes are arranged in an equally spaced ring, with both ends extending into the hollow vertical shaft and located on the upper part of the isolation block. On both the top and bottom of the main body of the coarse steaming vessel, reinforcing rods are fixedly installed. The steam inlet pipe and the steam outlet pipe are fixedly installed at one end of the corresponding reinforcing rod. One end of the steam inlet pipe extends to the inside of the top of the hollow vertical shaft, and one end of the steam outlet pipe extends to the inside of the bottom of the hollow vertical shaft. High-temperature resistant sealing rings are fixedly installed on the outer walls of the steam inlet pipe and the steam outlet pipe. Both high-temperature resistant sealing rings slide and seal against the inner wall of the hollow vertical shaft. The drive assembly is located on the top of the main body of the coarse steaming vessel and is used to control the rotation of the hollow vertical shaft.

[0008] A further configuration of this application is as follows: the drive assembly includes a motor, a main gear, and a secondary gear. The motor is fixedly installed on the top of the main body of the coarse steaming kettle, the main gear is fixedly installed on the output shaft end of the motor, and the secondary gear is fixedly fitted on the hollow vertical shaft. The main gear and the secondary gear mesh.

[0009] A further feature of this application is that a temperature sensor is fixedly installed on one inner wall of the main body of the crude steamer.

[0010] A further configuration of this application is as follows: the condensation mechanism includes two hollow heat-conducting discs, multiple vertical heat-conducting pipes, a cooling water inlet pipe, a cooling water outlet pipe, and two electromagnetic check valves. The two hollow heat-conducting discs are respectively fixedly installed on the top inner wall and bottom inner wall of the THF solution receiving tank. The multiple vertical heat-conducting pipes are all fixedly installed between the two hollow heat-conducting discs and are evenly distributed. The two ends of the vertical heat-conducting pipes are respectively connected to the corresponding hollow heat-conducting discs. The cooling water inlet pipe is fixedly installed on the top of the THF solution receiving tank, with one end extending into the upper hollow heat-conducting disc. The cooling water outlet pipe is fixedly installed on the bottom of the THF solution receiving tank, with one end extending into the lower hollow heat-conducting disc. The two electromagnetic check valves are respectively fixedly installed on the cooling water inlet pipe and the cooling water outlet pipe.

[0011] A further feature of this application is that a THF solution discharge pipe is fixedly installed on one side of the THF solution receiving tank, and an electromagnetic discharge valve is fixedly installed on the THF solution discharge pipe.

[0012] A further feature of this application is that a vacuum pump is fixedly installed on one side of the outer wall of the main body of the coarse steaming vessel, and an air suction pipe is fixedly installed at the suction end of the vacuum pump, with one end of the air suction pipe extending into the main body of the coarse steaming vessel.

[0013] A further feature of this application is that a vacuum pressure gauge is fixedly installed on the top of the main body of the crude steaming vessel.

[0014] This application includes at least one of the following beneficial technical effects:

[0015] 1. This application utilizes the coordinated operation of the heating, stirring, and condensing mechanisms to quickly and comprehensively extract THF from crude products containing THF in the form of steam and condense it into a solution for recovery. Simultaneously, it achieves the separation of crude products, greatly improving the efficiency of THF recovery and crude product separation. Furthermore, by integrating the THF recovery and crude product separation processes into one, it reduces intermediate steps, avoids the losses and pollution caused by multiple material transfers in traditional separation methods, and improves separation efficiency and product quality.

[0016] 2. This application utilizes the combined action of a steam extraction pump, a steam extraction pipe, and a steam transmission pipe to pump the THF vapor generated inside the main body of the crude steaming kettle to the THF solution receiving tank.

[0017] 3. This application utilizes a crude product discharge pipe and a solenoid discharge valve to discharge crude product that does not contain THF, and utilizes a THF solution discharge pipe and a solenoid discharge valve to discharge the condensed THF solution outside the THF solution receiving tank.

[0018] 4. This application utilizes a vacuum pump to create a vacuum inside the crude distillation vessel, thereby reducing the pressure inside the vessel and allowing THF to vaporize at a lower temperature under certain conditions, improving distillation efficiency and reducing energy consumption and material loss. The vacuum pressure gauge can display the vacuum level inside the crude distillation vessel in real time, providing data support for operation. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram from the first perspective of this embodiment.

[0020] Figure 2 This is a three-dimensional structural diagram from the second perspective of this embodiment.

[0021] Figure 3 This is a schematic diagram of the front sectional view of this embodiment.

[0022] Figure 4 This is a schematic diagram of the main structure of the hollow vertical shaft and the serpentine heat pipe.

[0023] Figure 5 This is a schematic diagram of the main view sectional structure of the hollow vertical axis.

[0024] Figure 6 This is a schematic diagram of the front sectional view of the THF solution receiving tank.

[0025] In the diagram: 1. Main body of the crude steaming kettle; 2. Support leg; 3. Feeding pipe; 4. End cover; 5. Crude product discharge pipe; 6. Electromagnetic discharge valve one; 7. Hollow vertical shaft; 8. Isolation block; 9. Serpentine heat conduction pipe; 10. Steam inlet pipe; 11. Steam outlet pipe; 12. Motor; 13. Main gear; 14. Secondary gear; 15. Reinforcing rod; 16. Temperature sensor; 17. THF solution receiving tank; 18. Steam pump; 19. Steam extraction pipe; 20. Steam transmission pipe; 21. Hollow heat conduction plate; 22. Vertical heat conduction pipe; 23. Cooling water inlet pipe; 24. Cooling water outlet pipe; 25. Electromagnetic check valve; 26. THF solution discharge pipe; 27. Electromagnetic discharge valve two; 28. Vacuum pump; 29. ​​Suction pipe; 30. Vacuum pressure gauge. Detailed Implementation

[0026] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] See Figures 1-6This application provides an integrated device for THF recovery and crude product separation in a crude distillation vessel, including a crude distillation vessel body 1 and a THF solution receiving tank 17 located on one side of the crude distillation vessel body 1. A support leg 2 is fixedly installed at the bottom of the crude distillation vessel body 1, and a feeding pipe 3 is fixedly installed at the top of the crude distillation vessel body 1 to facilitate the pouring of THF-containing crude product into the crude distillation vessel body 1. An end cap 4 is threaded onto the top of the feeding pipe 3 to seal the top of the feeding pipe 3. A crude product discharge pipe 5 is fixedly installed at the bottom front side of the crude distillation vessel body 1, and an electromagnetic discharge valve 6 is fixedly installed on the crude product discharge pipe 5. The crude product discharge pipe 5 and the electromagnetic discharge valve 6 are configured to discharge THF-free crude product.

[0028] A heating and stirring mechanism is provided on the main body 1 of the crude steaming vessel. This mechanism is used to stir the crude product containing THF inside the main body 1. The heating and stirring mechanism includes a hollow vertical shaft 7, an isolation block 8, multiple serpentine heat-conducting pipes 9, a steam inlet pipe 10, a steam outlet pipe 11, and a drive assembly. The hollow vertical shaft 7 is rotatably installed inside the main body 1 of the crude steaming vessel, with its top and bottom extending outside the vessel. The isolation block 8 is fixedly installed inside the hollow vertical shaft 7. Multiple serpentine heat-conducting pipes 9 are fixedly installed inside the hollow vertical shaft 7 and located within the main body 1 of the crude steaming vessel. The multiple serpentine heat-conducting pipes 9 are evenly spaced in a ring shape, with both ends extending into the hollow vertical shaft 7 and located above and below the isolation block 8, respectively. Reinforcing rods 15 are fixedly installed at both the top and bottom. Steam inlet pipe 10 and steam outlet pipe 11 are both fixedly installed at one end of the corresponding reinforcing rod 15. One end of the steam inlet pipe 10 extends into the top of the hollow vertical shaft 7, and one end of the steam outlet pipe 11 extends into the bottom of the hollow vertical shaft 7. The isolation block 8 divides the internal space of the hollow vertical shaft 7 into two parts, allowing steam to flow smoothly from top to bottom through the serpentine heat pipe 9. The steam inlet pipe 10 is used to transport high-temperature steam into the hollow vertical shaft 7, and the steam outlet pipe 11 is used to discharge the low-temperature steam after heat release. The two reinforcing rods 15 respectively reinforce the steam inlet pipe 10 and the steam outlet pipe 11, preventing the steam inlet pipe 10 and the steam outlet pipe 11 from being damaged during the rotation of the hollow vertical shaft 7. Pipe 11 rotates accordingly. High-temperature resistant sealing rings are fixedly installed on the outer walls of both the steam inlet pipe 10 and the steam outlet pipe 11. Both high-temperature resistant sealing rings slide and seal against the inner wall of the hollow vertical shaft 7. These two high-temperature resistant sealing rings effectively seal the gaps between the steam inlet pipe 10 and the hollow vertical shaft 7, and between the steam outlet pipe 11 and the hollow vertical shaft 7, respectively, preventing steam leakage from the top or bottom of the hollow vertical shaft 7. The drive assembly is located at the top of the main body 1 of the coarse steaming vessel. The drive assembly controls the rotation of the hollow vertical shaft 7. High-temperature steam is evenly heated by passing through multiple equally spaced annularly distributed serpentine heat-conducting pipes 9. Combined with the rotation and stirring of the hollow vertical shaft, the heating of the THF-containing coarse product is more uniform, promoting… Regarding the THF evaporation process, it should be noted that the end of the steam inlet pipe 10 furthest from the hollow vertical shaft 7 is fixedly connected to the steam outlet port of an external steam generator, and the end of the steam outlet pipe 11 furthest from the hollow vertical shaft 7 is fixedly connected to an external low-temperature steam recovery tank. The drive assembly includes a motor 12, a main gear 13, and a secondary gear 14. The motor 12 is fixedly mounted on the top of the coarse steaming vessel body 1, the main gear 13 is fixedly mounted on the output shaft end of the motor 12, and the secondary gear 14 is fixedly mounted on the hollow vertical shaft 7. The main gear 13 and the secondary gear 14 mesh, and the motor 12 controls the rotation of the main gear 13. Utilizing the meshing transmission action of the main gear 13 and the secondary gear 14, the rotation of the hollow vertical shaft 7 can be controlled, causing multiple serpentine heat pipes 9 to rotate along with the hollow vertical shaft 7.Furthermore, by utilizing the rotation of multiple serpentine heat-conducting tubes 9, the crude product containing THF can be uniformly stirred, and the heat from the high-temperature steam can be evenly and comprehensively transferred to the crude product containing THF, thereby enhancing the evaporation effect and efficiency of THF.

[0029] In this embodiment, the THF solution receiving tank 17 is fixedly installed on one outer wall of the crude steaming vessel body 1 by a bracket. A steam extraction pump 18 for extracting THF vapor is fixedly installed on the top of the crude steaming vessel body 1. A steam extraction pipe 19 is fixedly connected to the suction end of the steam extraction pump 18, with one end of the steam extraction pipe 19 extending into the crude steaming vessel body 1. A steam delivery pipe 20 is fixedly connected to the discharge end of the steam extraction pump 18, with one end of the steam delivery pipe 20 extending into the THF solution receiving tank 17. By utilizing the combined action of the steam extraction pump 18, the steam extraction pipe 19, and the steam delivery pipe 20, the crude steaming vessel... The THF vapor generated within the main body 1 is pumped into the THF solution receiving tank 17. The THF solution receiving tank 17 is equipped with a condensation mechanism to condense the THF vapor into a THF solution. The condensation mechanism includes two hollow heat-conducting plates 21, multiple vertical heat-conducting pipes 22, a cooling water inlet pipe 23, a cooling water outlet pipe 24, and two electromagnetic check valves 25. The two hollow heat-conducting plates 21 are respectively fixedly installed on the top and bottom inner walls of the THF solution receiving tank 17, and the multiple vertical heat-conducting pipes 22 are all fixedly installed between the two hollow heat-conducting plates 21. The vertical heat pipes 22 are evenly distributed, with both ends connected to corresponding hollow heat-conducting plates 21. Cooling water inlet pipe 23 is fixedly installed at the top of the THF solution receiving tank 17, with one end extending into the upper hollow heat-conducting plate 21. Cooling water outlet pipe 24 is fixedly installed at the bottom of the THF solution receiving tank 17, with one end extending into the lower hollow heat-conducting plate 21. Two electromagnetic check valves 25 are fixedly installed on the cooling water inlet pipe 23 and the cooling water outlet pipe 24, respectively. 3. The low-temperature cooling water is guided to the upper hollow heat conduction plate 21, so that the low-temperature cooling water entering the upper hollow heat conduction plate 21 flows from top to bottom along multiple vertical heat conduction pipes 22, which can perform comprehensive and rapid heat absorption and condensation treatment on THF steam. Then, the high-temperature cooling water flows into the lower hollow heat conduction plate 21 and finally flows away through the cooling water outlet pipe 24. It should be noted that one end of the cooling water inlet pipe 23 is fixedly connected to the external low-temperature cooling water pipe, and one end of the cooling water outlet pipe 24 is fixedly connected to the external high-temperature cooling water pipe.

[0030] In this embodiment, a temperature sensor 16 is fixedly installed on the inner wall of one side of the main body 1 of the coarse steaming kettle, which is used to monitor the internal temperature of the main body 1 of the coarse steaming kettle in real time, so that the operator can adjust the heating state in time and prevent the temperature from being too high, which may cause safety problems or production quality issues.

[0031] In this embodiment, a THF solution discharge pipe 26 is fixedly installed on one side of the THF solution receiving tank 17, and an electromagnetic discharge valve 27 is fixedly installed on the THF solution discharge pipe 26 to facilitate the discharge of the condensed THF solution out of the THF solution receiving tank 17.

[0032] In this embodiment, a vacuum pump 28 is fixedly installed on one outer wall of the crude distillation vessel body 1. A suction pipe 29 is fixedly installed at the suction end of the vacuum pump 28, and one end of the suction pipe 29 extends into the crude distillation vessel body 1. A vacuum pressure gauge 30 is fixedly installed on the top of the crude distillation vessel body 1. The vacuum pump 28 is used to evacuate the inside of the crude distillation vessel body 1. By reducing the pressure inside the crude distillation vessel body 1, THF can be vaporized at a lower temperature as needed under certain conditions, thereby improving distillation efficiency and reducing energy consumption and material loss. The vacuum pressure gauge 30 can display the vacuum level inside the crude distillation vessel body 1 in real time, providing data support for operation.

[0033] In this embodiment, it should be noted that the electromagnetic discharge valve 6, motor 12, steam pump 18, electromagnetic check valve 25, electromagnetic discharge valve 27, and vacuum pump 28 are all commercially available. Their wiring connection and control methods are mature technologies in the field and are fully disclosed. Therefore, they will not be described in detail here.

[0034] Based on the above structure, the working principle of the integrated THF recovery and crude product separation equipment provided in this application is as follows:

[0035] After opening the end cover 4, the crude product containing THF is added into the crude steamer body 1 through the top feeding pipe 3, and then the end cover 4 is put back.

[0036] Next, high-temperature steam is controlled to flow into the hollow vertical shaft 7 through the steam inlet pipe 10, and the motor 12 is turned on. The motor 12 drives the main gear 13 to rotate, which in turn causes the secondary gear 14 meshing with the main gear 13 to rotate. The secondary gear 14 drives the hollow vertical shaft 7 to rotate, causing multiple serpentine heat conduction tubes 9 to rotate as well. At the same time, steam enters the hollow vertical shaft 7 through the steam inlet pipe 10 and flows into each serpentine heat conduction tube 9 from top to bottom. This allows the crude product in the main body 1 of the coarse steaming kettle to be stirred and heated at the same time. Under the action of multiple serpentine heat conduction tubes 9 rotating and stirring, the THF-containing crude product is heated more evenly, which can accelerate the evaporation of THF to form THF steam. The low-temperature steam after releasing heat is discharged through the steam outlet pipe 11.

[0037] Then, by starting the steam extraction pump 18, the THF vapor generated in the main body 1 of the crude steaming kettle is extracted through the steam extraction pipe 19 and transported to the THF solution receiving tank 17 through the steam transmission pipe 20. The low temperature cooling water is controlled to flow through the cooling water inflow pipe 23 and enter the upper hollow heat conduction plate 21 under the control of the electromagnetic check valve 25. Then it flows through multiple vertical heat conduction pipes 22 and finally flows out from the lower hollow heat conduction plate 21 through the cooling water outflow pipe 24. During this process, the cooling water continuously absorbs the heat of the THF vapor and can condense it into THF solution and store it in the THF solution receiving tank 17 in a comprehensive and rapid manner.

[0038] Finally, after the THF recovery and crude product separation are completed, the motor 12 is stopped and the steam is stopped from entering the hollow vertical shaft 7. By opening the electromagnetic discharge valve 6 on the crude product discharge pipe 5, the crude product without THF can be discharged outside the crude steaming kettle body 1. By opening the electromagnetic discharge valve 27 on the THF solution discharge pipe 26, the THF solution can be discharged from the THF solution receiving tank 17.

[0039] Throughout the process, THF recovery and crude product separation are integrated into one, reducing intermediate steps and avoiding the losses and pollution caused by multiple material transfers in traditional separation methods. This improves separation efficiency and product quality. In addition, temperature sensor 16 can monitor the temperature inside the crude steaming kettle body 1 in real time, and operators can adjust the heating status based on the temperature data.

[0040] During the THF recovery and crude product separation operation, the vacuum pump 28 can be started to evacuate the crude distillation vessel body 1 as needed, thereby reducing the pressure inside the crude distillation vessel body 1 and allowing THF to vaporize at a lower temperature, improving distillation efficiency and reducing energy consumption and material loss.

Claims

1. An apparatus for integrating recovery of crude still THF and separation of crude product, characterized by, The utility model provides a crude distillation kettle, including the crude distillation kettle main part (1) and the THF solution access tank (17) of one side of crude distillation kettle main part (1), the bottom fixed mounting of crude distillation kettle main part (1) has support leg (2), the top fixed mounting of crude distillation kettle main part (1) has feeding pipe (3), the top end screw thread installation of feeding pipe (3) has end cover (4), the bottom fixed mounting of crude distillation kettle main part (1) front side has crude product discharge pipe (5), crude product discharge pipe (5) is fixedly installed and is equipped with electromagnetic discharge valve one (6), be provided with heating stirring mechanism on crude distillation kettle main part (1), heating stirring mechanism is used for the crude product containing THF in crude distillation kettle main part (1) inside stirring processing, the THF solution access tank (17) is fixedly installed through support on the one side outer wall of crude distillation kettle main part (1), the top fixed mounting of crude distillation kettle main part (1) is equipped with the steam extraction pump (18) for extracting THF steam, the suction end fixed connection of steam extraction pump (18) is equipped with steam extraction pipe (19), one end of steam extraction pipe (19) extends to in crude distillation kettle main part (1), the discharge end fixed connection of steam extraction pump (18) is equipped with steam delivery pipe (20), one end of steam delivery pipe (20) extends to in THF solution access tank (17), be provided with condensing mechanism on THF solution access tank (17), condensing mechanism is used for THF steam condensation and is made into THF solution.

2. The crude kettle THF recovery and crude product separation integrated apparatus according to claim 1, characterized by: The heating stirring mechanism includes a hollow vertical shaft (7), a spacer block (8), a plurality of serpentine heat pipes (9), a steam inlet pipe (10), a steam outlet pipe (11), and a driving assembly. The hollow vertical shaft (7) is rotatably installed in the crude distillation kettle main part (1), and the top end and the bottom of the hollow vertical shaft (7) extend out of the crude distillation kettle main part (1). The spacer block (8) is fixedly installed in the hollow vertical shaft (7). A plurality of serpentine heat pipes (9) are fixedly installed in the hollow vertical shaft (7) and located in the crude distillation kettle main part (1). The plurality of serpentine heat pipes (9) are equally spaced and arranged in a ring shape. The two ends of the serpentine heat pipes (9) extend into the hollow vertical shaft (7) and are located above and below the spacer block (8), respectively. Reinforcing rods (15) are fixedly installed at the top and the bottom of the crude distillation kettle main part (1). The steam inlet pipe (10) and the steam outlet pipe (11) are fixedly installed at one end of the corresponding reinforcing rod (15). One end of the steam inlet pipe (10) extends into the top end of the hollow vertical shaft (7), and one end of the steam outlet pipe (11) extends into the bottom end of the hollow vertical shaft (7). High-temperature-resistant sealing rings are fixedly installed on the outer pipe walls of the steam inlet pipe (10) and the steam outlet pipe (11). The two high-temperature-resistant sealing rings are in sliding sealing contact with the inner wall of the hollow vertical shaft (7). The driving assembly is arranged at the top of the crude distillation kettle main part (1) and is used to control the rotation of the hollow vertical shaft (7).

3. The crude kettle THF recovery and crude product separation integrated apparatus according to claim 2, characterized by: The driving assembly comprises a motor (12), a main gear (13) and a secondary gear (14), the motor (12) is fixedly installed on the top of the rough distillation kettle body (1), the main gear (13) is fixedly installed on the output shaft end of the motor (12), the secondary gear (14) is fixedly sleeved on the hollow vertical shaft (7), and the main gear (13) is engaged with the secondary gear (14).

4. The crude kettle THF recovery and crude product separation integrated apparatus according to claim 1, characterized by: A temperature sensor (16) is fixedly installed on the inner wall of one side of the rough distillation kettle body (1).

5. The crude kettle THF recovery and crude product separation integrated apparatus of claim 1, wherein: The condensing mechanism comprises two hollow heat-conducting discs (21), a plurality of vertical heat-conducting pipes (22), a cooling water inflow pipe (23), a cooling water outflow pipe (24) and two electromagnetic check valves (25), the two hollow heat-conducting discs (21) are fixedly installed on the top inner wall and the bottom inner wall of the THF solution receiving tank (17) respectively, the plurality of vertical heat-conducting pipes (22) are fixedly installed between the two hollow heat-conducting discs (21) and are evenly distributed, the two ends of the vertical heat-conducting pipe (22) are communicated with the corresponding hollow heat-conducting disc (21) respectively, the cooling water inflow pipe (23) is fixedly installed on the top of the THF solution receiving tank (17), one end of the cooling water inflow pipe (23) extends into the upper hollow heat-conducting disc (21), the cooling water outflow pipe (24) is fixedly installed on the bottom of the THF solution receiving tank (17), one end of the cooling water outflow pipe (24) extends into the lower hollow heat-conducting disc (21), and the two electromagnetic check valves (25) are fixedly installed on the cooling water inflow pipe (23) and the cooling water outflow pipe (24) respectively.

6. The crude kettle THF recovery and crude product separation integrated apparatus of claim 5, wherein: One side of the THF solution receiving tank (17) is fixedly installed with a THF solution discharge pipe (26), and the THF solution discharge pipe (26) is fixedly installed with an electromagnetic discharge valve two (27).

7. The crude kettle THF recovery integrated with crude product separation apparatus of claim 1, wherein: A vacuum pump (28) is fixedly installed on the outer wall of one side of the rough distillation kettle body (1), a suction pipe (29) is fixedly installed on the suction end of the vacuum pump (28), and one end of the suction pipe (29) extends into the rough distillation kettle body (1).

8. The crude kettle THF recovery and crude product separation integrated apparatus of claim 1, wherein: A vacuum pressure gauge (30) is fixedly installed on the top of the rough distillation kettle body (1). A vacuum pressure gauge (30) is fixedly installed on the top of the rough distillation kettle body (1).

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