Titanium tetrachloride multistage rectification and purification device and method of use thereof

Abstract

The application discloses a titanium tetrachloride multistage rectification and purification device and a use method thereof, and belongs to the technical field of chemical smelting separation, and comprises a multistage rectification tower, and a main support is fixedly connected to the multistage rectification tower; in the application, a driving motor drives a handle to rotate, a push rod slides in a connecting groove and pushes a I-shaped plate to translate along a sliding groove, an activity plate is moved to the I-shaped plate direction along a limiting through cavity, so that the locking of multiple heat exchange pipes is released, at this time, an operator takes out the failed or blocked heat exchange pipe from the main connecting hole, the auxiliary connecting hole and the through hole on the mounting plate, immediately replaces the new or cleaned standby heat exchange pipe, then reversely starts the driving motor to drive the handle to rotate, the activity plate drives the clamp to be clamped into the annular groove, and then the synchronous locking of the multiple heat exchange pipes is completed, the operation is simple, the modular disassembly and replacement of the heat exchange pipes are realized, the whole heat exchange pipe can be moved out from the reduction bin, the operation space is sufficient, and the maintenance and inspection are facilitated.

Description

Technical Field

[0001] This invention belongs to the field of chemical smelting and separation technology, and particularly relates to a multi-stage distillation and purification device for titanium tetrachloride and its usage method. Background Technology

[0002] Titanium tetrachloride, also known as titanium chloride, has a molecular weight of 189.68. At room temperature, it is a colorless to pale yellow transparent fuming liquid with a pungent acidic odor. It has a melting point of about -25℃, a boiling point of 136.4℃, and a density of 1.726 g / cm³. It is soluble in cold water, ethanol, and chlorinated hydrocarbons. It is chemically reactive and undergoes vigorous hydrolysis in water or humid air to produce titanium dioxide fumes and hydrogen chloride. It reacts with alcohols to form titanate esters and forms a Ziegler-Natta catalyst with triethylaluminum.

[0003] Given that vanadium oxychloride and titanium tetrachloride have similar boiling points, conventional distillation is insufficient to remove vanadium. A reducing agent must be added to the reduction chamber, and the bottom heat exchange tubes are used to drive liquid-phase reduction and gas-liquid separation, simultaneously removing vanadium slag and high-boiling impurities. However, the vanadium slag and solid impurities generated by the reaction easily compact and scale on the outer wall of the heat exchange tubes, leading to a sharp increase in thermal resistance. To maintain the process temperature, the temperature of the heating medium must be continuously increased, further creating a vicious cycle and reducing efficiency. Furthermore, the traditional built-in, fixed, welded tube bundles are difficult to disassemble and repair, making maintenance and replacement operations extremely challenging. Therefore, a multi-stage distillation and purification device for titanium tetrachloride and its application method are urgently needed to solve these problems. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that traditional built-in fixed welded tube bundles are difficult to disassemble, inspect, and maintain, and that replacement operations are very difficult. Therefore, this invention proposes a multi-stage distillation and purification device for titanium tetrachloride and its usage method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-stage distillation and purification apparatus for titanium tetrachloride includes a multi-stage distillation column, a main support fixedly connected to the multi-stage distillation column, a reduction chamber fixedly installed below the multi-stage distillation column, a feed inlet fixedly connected to one side of the reduction chamber, a sealing cover fixedly connected to the other side of the reduction chamber, a waste outlet fixedly connected below the reduction chamber, a secondary support fixedly connected to the reduction chamber, a sliding cavity opened inside the sealing cover, a baffle fixedly connected to the cavity wall of the sliding cavity, and a fixed cover slidably connected inside the sliding cavity;

[0007] A support plate is fixedly connected to one side of the fixed cover. An installation plate is fixedly connected inside the fixed cover. Multiple heat exchange tubes are inserted and installed on the installation plate at equal intervals. A connecting cover is fixedly connected to one side of the installation plate. A sliding groove is opened inside the installation plate. Multiple limiting cavities are opened at equal intervals on the upper and lower groove walls of the sliding cavity. A main connecting hole is opened above the sliding groove on the installation plate. A secondary connecting hole is opened below the sliding groove on the installation plate. Sealing rings are fixedly connected to the walls of both the main connecting hole and the secondary connecting hole.

[0008] An I-shaped plate is slidably connected within the chute. A connecting groove is provided on one side of the I-shaped plate, and inclined top grooves are provided on both sides of the I-shaped plate. Multiple movable plates are slidably arranged in the middle recess of the I-shaped plate. Clamps are fixedly connected to the movable plates, and protruding rods are fixedly connected to both sides of the movable plates. The connecting cover is attached to the auxiliary support on both sides and a connecting seat is fixedly connected below. A partition is fixedly connected inside the connecting cover, and the partition is located between the main connecting hole and the auxiliary connecting hole and is fixedly connected to the mounting plate.

[0009] The connecting cover is provided with a liquid inlet chamber above the partition and a liquid outlet chamber below the partition. A liquid inlet pipe is fixedly connected to one side of the liquid inlet chamber and a liquid outlet pipe is fixedly connected to one side of the liquid outlet chamber. An electric push rod is fixedly installed above the support plate. A connecting plate is fixedly connected to the movable end of the electric push rod. Multiple mounting slots are equally spaced below the connecting plate. A connecting strip is inserted into the mounting slot. A through hole is opened on the connecting strip. A scraping layer is fixedly installed in the through hole.

[0010] As a further description of the above technical solution:

[0011] The main support and the secondary support are fixedly connected. A working motor is fixedly installed on the secondary support. The output shaft of the working motor is connected to a lead screw. A mating sleeve is fixedly installed inside the connecting seat. The mating sleeve is threadedly engaged with the lead screw.

[0012] As a further description of the above technical solution:

[0013] A drive motor is fixedly installed on one side of the connecting cover. The output shaft of the drive motor is connected to a connecting shaft. The connecting shaft passes through the partition and the mounting plate and is rotatably connected to the partition through a bearing. A crank is fixedly connected to one end of the connecting shaft that passes through the mounting plate. A push rod is fixedly connected to the crank and slides in the connecting groove.

[0014] As a further description of the above technical solution:

[0015] A rubber ring is fixedly connected to one side of the baffle, and a fitting groove is provided on one side wall of the fixing cover, and the baffle fits into the fitting groove.

[0016] As a further description of the above technical solution:

[0017] The chute is connected to the main connection hole and the secondary connection hole through the limiting cavities on the upper and lower sides. The movable plate is slidably engaged with the limiting chute. The protruding rod is slidably engaged with the inclined top groove. An annular groove is opened on the wall of the heat exchange tube. The end of the heat exchange tube is inserted into the main connection hole, the secondary connection hole and the through hole. The clamp is fitted into the annular groove.

[0018] As a further description of the above technical solution:

[0019] The lead screw is rotatably connected to the sub-support via a bearing. Telescopic covers are sleeved at both ends of the lead screw. One end of the telescopic cover is fixedly connected to the sub-support, and the other end of the telescopic cover is fixedly connected to the connecting seat.

[0020] As a further description of the above technical solution:

[0021] A main threaded hole is provided on the upper wall of the mounting groove, and a secondary threaded hole is provided on the upper part of the connecting strip. The main threaded hole and the secondary threaded hole are positioned correspondingly and are connected by a bolt with a common thread.

[0022] A method of using a multi-stage distillation and purification apparatus for titanium tetrachloride, the method comprising the following steps:

[0023] During operation, heat exchange medium is injected into the inlet chamber through the inlet pipe. After the heat exchange medium is evenly distributed in the inlet chamber, it flows into multiple heat exchange tubes inserted on the mounting plate through the main connection hole. During the flow of the heat exchange medium through the heat exchange tubes, it exchanges heat with the reaction products in the reduction chamber. Then it flows into the outlet chamber through the secondary connection hole and is finally discharged through the outlet pipe. When the chemical reaction is completed, the electric push rod is activated to push the connecting plate to slide in the reduction chamber.

[0024] The moving connecting plate synchronously drives multiple connecting strips to slide on the heat exchange tube, thereby scraping and rubbing the deposits on the outer wall of the heat exchange tube through the scraping layer inside the through hole. The debris generated during cleaning falls directly into the bottom of the reduction chamber. Finally, the waste debris and waste liquid are discharged through the waste outlet. Then, the working motor is started to drive the lead screw to rotate. Then, through the threaded engagement between the fitting sleeve and the lead screw, the connecting seat drives the connecting cover, mounting plate and fixing cover to slide outward along the sliding cavity until the fixing cover and heat exchange tube are completely separated from the closed cover.

[0025] At this time, the drive motor is started, which drives the crank to rotate through the connecting shaft. As the crank rotates, the push rod on the crank slides in the connecting groove on one side of the I-shaped plate and pushes the I-shaped plate to move along the slide groove. During the process, the I-shaped plate pushes the protruding rods on both sides of the movable plate through the inclined groove wall of the inclined top groove, causing the movable plate to move along the limiting cavity towards the I-shaped plate, thereby causing the clamp to disengage from the annular groove on the heat exchange tube, thus releasing the locking of multiple heat exchange tubes.

[0026] At this point, the operator will pull out the failed or blocked heat exchange tube from the main connection hole, auxiliary connection hole and through hole on the mounting plate, and then replace it with a brand new or cleaned spare heat exchange tube. Before replacing the heat exchange tube, the bolts will be loosened to separate the bolts from the main thread hole and auxiliary thread hole, thereby releasing the lock on the connecting strip. Then, the severely worn connecting strip will be pulled out from the mounting groove and replaced. After the replacement is completed, the bolts will be reinserted and tightened to ensure that the connecting strip is securely installed under the connecting plate.

[0027] After replacing the heat exchange tubes by re-inserting both ends into the corresponding main and auxiliary connection holes, the drive motor is reversed to rotate the crank handle, causing the push rod to push the wall of the connecting groove to reset the I-shaped plate. This causes the inclined top groove to push the protruding rod in the opposite direction, causing the movable plate to move the clamp towards the heat exchange tubes, so that the clamp is engaged in the annular groove, thus completing the synchronous locking of multiple heat exchange tubes. Subsequently, the working motor reverses, and the drive screw moves the connecting seat and the fixed cover back into the sliding cavity, causing the fixed cover to re-embed into the sliding cavity and the baffle to engage with the fitting groove. During the process, the rubber ring on the baffle is deformed by pressure, forming a seal with the fixed cover, and then it is put into the next round of distillation reduction production.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, the working motor drives the lead screw to rotate, and then through the threaded engagement of the fitting sleeve and the lead screw, the connecting seat drives the connecting cover, mounting plate, and fixing cover to slide outward along the sliding cavity until the fixing cover and heat exchange tube are completely detached from the closed cover. At this time, the drive motor is started, and the drive motor drives the crank to rotate through the connecting shaft. As the crank rotates, the push rod on the crank slides in the connecting groove on one side of the I-shaped plate and pushes the I-shaped plate to move horizontally along the sliding groove. During the process, the I-shaped plate pushes the protruding rods on both sides of the movable plate through the inclined groove wall of the inclined top groove, causing the movable plate to move along the limiting cavity towards the I-shaped plate, thereby causing the clamp to engage with the annular ring on the heat exchange tube. The tank phase is disengaged, thereby releasing the locking of multiple heat exchange tubes. At this time, the operator will pull out the failed or blocked heat exchange tubes from the main connection hole, auxiliary connection hole and through hole on the mounting plate, and then replace them with brand new or cleaned spare heat exchange tubes. After that, the drive motor is started in reverse to drive the crank handle to rotate, causing the push rod to push the tank wall of the connecting tank to reset the I-shaped plate. Then, the inclined top tank pushes the protruding rod in the opposite direction, causing the movable plate to drive the clamp to lock into the annular groove, thereby completing the synchronous locking of multiple heat exchange tubes. The operation is simple, realizes the modular disassembly and replacement of heat exchange tubes, and the heat exchange tubes as a whole can be moved out of the reduction chamber. There is enough operating space to facilitate maintenance and inspection. 2. In this invention, by activating the electric push rod, the connecting plate is pushed to slide within the reduction chamber. The moving connecting plate simultaneously drives multiple connecting strips to slide on the heat exchange tube. The scraping layer inside the through hole scrapes and rubs the deposits on the outer wall of the heat exchange tube, and the debris generated during cleaning falls directly into the bottom of the reduction chamber. Finally, the waste debris and waste liquid are discharged through the waste outlet, thereby achieving cleaning and anti-scaling maintenance of the outer surface of the heat exchange tube. This effectively solves the problem of heat exchange efficiency reduction caused by ash accumulation, coking, or material adhesion. Furthermore, when replacing the heat exchange tube, the bolts can be loosened to separate them from the main threaded hole and the secondary threaded hole, thereby releasing the locking of the connecting strips. The severely worn connecting strips can then be pulled out of the mounting groove for maintenance and replacement. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural schematic diagram of a multi-stage distillation and purification device for titanium tetrachloride and its usage method proposed in this invention;

[0030] Figure 2 This is a schematic cross-sectional view of the reduction chamber of a multi-stage distillation and purification apparatus for titanium tetrachloride and its usage method proposed in this invention.

[0031] Figure 3 This is a schematic diagram of the enclosed structure of a multi-stage distillation and purification apparatus for titanium tetrachloride and its usage method proposed in this invention.

[0032] Figure 4This is a schematic cross-sectional view of the connecting shroud structure of a multi-stage distillation and purification apparatus for titanium tetrachloride and its usage method proposed in this invention.

[0033] Figure 5 This is a schematic cross-sectional view of the mounting plate structure of a multi-stage distillation and purification device for titanium tetrachloride and its usage method proposed in this invention.

[0034] Figure 6 This is a three-dimensional structural diagram of the I-shaped plate and movable plate of a multi-stage distillation and purification device for titanium tetrachloride and its usage method proposed in this invention.

[0035] Figure 7 This is a three-dimensional structural diagram of the heat exchange tube of a multi-stage distillation and purification device for titanium tetrachloride and its usage method proposed in this invention.

[0036] Figure 8 This is a three-dimensional structural diagram of the connecting shaft of a multi-stage distillation and purification device for titanium tetrachloride and its usage method proposed in this invention.

[0037] Legend: 1. Multistage distillation column; 2. Main support; 3. Reduction chamber; 4. Feed inlet; 5. Sealing hood; 6. Waste outlet; 7. Secondary support; 8. Slide cavity; 9. Baffle; 10. Fixed cover; 11. Support plate; 12. Mounting plate; 13. Heat exchange tube; 14. Connecting cover; 15. Slide groove; 16. Limiting cavity; 17. Main connecting hole; 18. Secondary connecting hole; 19. Sealing ring; 20. I-shaped plate; 21. Connecting groove; 22. Inclined top groove; 23. Movable plate; 24. Clamp; 25. Protruding rod; 26. Connecting seat; 7. Partition plate; 28. Liquid inlet chamber; 29. ​​Liquid outlet chamber; 30. Liquid inlet pipe; 31. Liquid outlet pipe; 32. Electric push rod; 33. Connecting plate; 34. Mounting groove; 35. Connecting strip; 36. Through hole; 37. Scraping layer; 38. Working motor; 39. Lead screw; 40. Mating sleeve; 41. Drive motor; 42. Connecting shaft; 43. Handle; 44. Push rod; 45. Rubber ring; 46. Fitting groove; 47. Annular groove; 48. Telescopic cover; 49. Main threaded hole; 50. Secondary threaded hole; 51. Bolt. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In its specific implementation, such as Figures 1-8This invention provides a technical solution: a multi-stage distillation and purification device for titanium tetrachloride, comprising a multi-stage distillation column 1, a main support 2 fixedly connected to the multi-stage distillation column 1, a reduction chamber 3 fixedly installed below the multi-stage distillation column 1, a feed inlet 4 fixedly connected to one side of the reduction chamber 3, a sealing cover 5 fixedly connected to the other side of the reduction chamber 3, a waste outlet 6 fixedly connected below the reduction chamber 3, a secondary support 7 fixedly connected to the reduction chamber 3, the main support 2 and the secondary support 7 fixedly connected, a working motor 38 fixedly installed on the secondary support 7, and a lead screw 39 connected to the output shaft of the working motor 38. A sliding cavity 8 is provided inside the closed cover 5. A baffle 9 is fixedly connected to the cavity wall of the sliding cavity 8. A fixed cover 10 is slidably connected inside the sliding cavity 8. A rubber ring 45 is fixedly connected to one side of the baffle 9. A fitting groove 46 is provided on one side wall of the fixed cover 10. The baffle 9 fits into the fitting groove 46. When the baffle 9 and the fitting groove 46 gradually fit together, the rubber ring 45 on the baffle 9 is deformed by the pressure of the fixed cover 10 and fits tightly against the groove wall of the fitting groove 46, thereby forming a seal between the fixed cover 10 and the closed cover 5 to prevent the process gas or liquid in the reduction chamber 3 from leaking along the sliding cavity 8.

[0040] A support plate 11 is fixedly connected to one side of the upper part of the fixed cover 10. An installation plate 12 is fixedly connected inside the fixed cover 10. Multiple heat exchange tubes 13 are installed on the installation plate 12 at equal intervals. A connecting cover 14 is fixedly connected to one side of the installation plate 12. A sliding groove 15 is opened inside the installation plate 12, and multiple limiting cavities 16 are opened at equal intervals on the upper and lower groove walls of the sliding cavity 8. A main connecting hole 17 is opened above the sliding groove 15 on the installation plate 12, and a secondary connecting hole 18 is opened below the sliding groove 15 on the installation plate 12. Sealing rings 19 are fixedly connected to the walls of the main connecting hole 17 and the secondary connecting hole 18. An I-shaped plate 20 is slidably connected inside the sliding groove 15. A connecting groove 21 is opened on one side of the I-shaped plate 20, and inclined top grooves 22 are opened on both sides of the I-shaped plate 20. Multiple movable plates 23 are slidably arranged in the middle recess of the I-shaped plate 20, and clips are fixedly connected to the movable plates 23. The clamp 24 and the movable plate 23 are fixedly connected to the two sides with protruding rods 25. The sliding groove 15 is connected to the main connecting hole 17 and the secondary connecting hole 18 through the limiting through cavity 16 on the upper and lower sides. The movable plate 23 is slidably engaged with the limiting sliding cavity 8, and the protruding rod 25 is slidably engaged with the inclined top groove 22. The heat exchange tube 13 has an annular groove 47 on its tube wall. The end of the heat exchange tube 13 is inserted into the main connecting hole 17, the secondary connecting hole 18 and the through hole 36. The clamp 24 is fitted into the annular groove 47. The limiting sliding cavity 8 can limit and guide the movable plate 23, thereby preventing the movable plate 23 from deflecting and shaking when moving, and ensuring smooth movement. When the end of the heat exchange tube 13 is inserted into the main connecting hole 17 and the secondary connecting hole 18, the heat exchange tube 13 can squeeze the sealing ring 19, causing the sealing ring 19 to undergo elastic deformation and tightly fit between the outer wall of the heat exchange tube 13 and the hole wall, thereby forming a sealing structure.

[0041] The connecting cover 14 overlaps on both sides of the sub-support 7 and is fixedly connected to the bottom of the connecting seat 26. The connecting seat 26 is fixedly installed with the mating sleeve 40, which is threadedly engaged with the lead screw 39. The lead screw 39 is rotatably connected to the sub-support 7 through the bearing. The two ends of the lead screw 39 are fitted with telescopic covers 48. One end of the telescopic cover 48 is fixedly connected to the sub-support 7, and the other end of the telescopic cover 48 is fixedly connected to the connecting seat 26. When the lead screw 39 drives the connecting seat 26 to move, the connecting seat 26 can compress or stretch the telescopic covers 48 on both sides, thereby adaptively shielding the lead screw 39 through the telescopic covers 48, reducing the direct contact between the lead screw 39 and the outside world. The two sides of the connecting cover 14 overlap on the sub-support 7, so that the sub-support 7 can limit the connection cover 14 and the connecting seat 26 as a whole, preventing twisting and tilting during movement.

[0042] A partition 27 is fixedly connected inside the connecting cover 14, and the partition 27 is located between the main connecting hole 17 and the auxiliary connecting hole 18 and is fixedly connected to the mounting plate 12. A liquid inlet chamber 28 is provided above the partition 27 in the connecting cover 14, and a liquid outlet chamber 29 is provided below the partition 27 in the connecting cover 14. A liquid inlet pipe 30 is fixedly connected to one side of the liquid inlet chamber 28, and a liquid outlet pipe 31 is fixedly connected to one side of the liquid outlet chamber 29. A drive motor 41 is fixedly installed on one side of the connecting cover 14, and the output shaft of the drive motor 41 is connected to a connecting shaft 42. The connecting shaft 42 passes through the partition 27 and the mounting plate 12 and is rotatably connected to the partition 27 via a bearing. One end of the connecting shaft 42 that passes through the mounting plate 12 is fixedly connected to a handle 43. A push rod 44 is fixedly connected to the handle 43. The push rod 44 slides in the connecting groove 21. When the handle 43 rotates and the push rod 44 pushes the I-shaped plate 20, the I-shaped plate 20 can slide in the slide groove 15. The slide groove 15 guides and restricts the I-shaped plate 20, thereby preventing the I-shaped plate 20 from shifting laterally during the force process.

[0043] An electric push rod 32 is fixedly installed above the support plate 11. A connecting plate 33 is fixedly connected to the movable end of the electric push rod 32. Multiple mounting slots 34 are equally spaced below the connecting plate 33. A connecting strip 35 is inserted into the mounting slot 34. A through hole 36 is opened on the connecting strip 35. A scraping layer 37 is fixedly installed in the through hole 36. A main threaded hole 49 is opened on the upper wall of the mounting slot 34. A secondary threaded hole 50 is opened on the upper part of the connecting strip 35. The main threaded hole 49 and the secondary threaded hole 50 are correspondingly connected and are threaded together with a bolt 51. The mounting slot 34 can be used to position the installation of the connecting strip 35 to prevent the installation of the connecting strip 35 from being misaligned. This facilitates the accurate alignment of the main threaded hole 49 and the secondary threaded hole 50, allowing the bolt 51 to be smoothly inserted and tightened, thereby firmly locking the connecting strip 35 in the mounting slot 34.

[0044] A method for using a multi-stage distillation and purification apparatus for titanium tetrachloride includes the following steps:

[0045] During operation, heat exchange medium is injected into the liquid inlet chamber 28 through the liquid inlet pipe 30. After the heat exchange medium is evenly distributed in the liquid inlet chamber 28, it flows into multiple heat exchange tubes 13 inserted on the mounting plate 12 through the main connection hole 17. During the flow of the heat exchange medium through the heat exchange tubes 13, it exchanges heat with the reaction products in the reduction chamber 3. Then it flows into the liquid outlet chamber 29 through the secondary connection hole 18 and is finally discharged through the liquid outlet pipe 31. When the chemical reaction is completed, the electric push rod 32 is activated to push the connecting plate 33 to slide in the reduction chamber 3.

[0046] The moving connecting plate 33 synchronously drives multiple connecting strips 35 to slide on the heat exchange tube 13, thereby scraping and rubbing the deposits on the outer wall of the heat exchange tube 13 through the scraping layer 37 inside the through hole 36. The debris generated during cleaning falls directly into the bottom of the reduction chamber 3. Finally, the waste debris and waste liquid are discharged through the waste outlet 6. Then, the working motor 38 is started to drive the lead screw 39 to rotate. Then, through the threaded engagement of the fitting sleeve 40 and the lead screw 39, the connecting seat 26 drives the connecting cover 14, the mounting plate 12 and the fixing cover 10 to slide outward along the sliding cavity 8 until the fixing cover 10 and the heat exchange tube 13 are completely separated from the closed cover 5.

[0047] At this time, the drive motor 41 is started, which drives the crank 43 to rotate through the connecting shaft 42. As the crank 43 rotates, the push rod 44 on the crank 43 slides in the connecting groove 21 on one side of the I-shaped plate 20 and pushes the I-shaped plate 20 to move along the sliding groove 15. During the process, the I-shaped plate 20 pushes the protruding rods 25 on both sides of the movable plate 23 through the inclined groove wall of the inclined top groove 22, causing the movable plate 23 to move along the limiting cavity 16 towards the I-shaped plate 20, thereby causing the clamp 24 to disengage from the annular groove 47 on the heat exchange tube 13, thereby releasing the locking of multiple heat exchange tubes 13.

[0048] At this time, the operator will pull out the failed or blocked heat exchange tube 13 from the main connection hole 17, the auxiliary connection hole 18 and the through hole 36 on the mounting plate 12, and then replace it with a brand new or cleaned spare heat exchange tube 13. Before replacing the heat exchange tube 13, the operator will loosen the bolt 51 to separate the bolt 51 from the main thread hole 49 and the auxiliary thread hole 50, thereby releasing the lock on the connecting strip 35. Then, the severely worn connecting strip 35 will be pulled out from the mounting groove 34 and replaced. After the replacement is completed, the bolt 51 will be reinserted and tightened to make the connecting strip 35 securely installed under the connecting plate 33.

[0049] After replacing the heat exchange tubes 13 by re-inserting both ends of the heat exchange tubes 13 into the corresponding main connection holes 17 and auxiliary connection holes 18, the drive motor 41 is started in reverse to rotate the crank handle 43, causing the push rod 44 to push the wall of the connecting groove 21 to reset the I-shaped plate 20. This causes the inclined top groove 22 to push the protruding rod 25 in the opposite direction, causing the movable plate 23 to move the clamp 24 toward the heat exchange tubes 13, so that the clamp 24 is locked into the annular groove 47, thereby completing the synchronous locking of multiple heat exchange tubes 13. Then the working motor 38 reverses, and the drive screw 39 drives the connecting seat 26 and the fixing cover 10 to move back to the sliding cavity 8, causing the fixing cover 10 to be re-embedded in the sliding cavity 8, and the baffle 9 to engage with the fitting groove 46. During the process, the rubber ring 45 on the baffle 9 is deformed by pressure, forming a seal with the fixing cover 10, and then it is put into the next round of distillation reduction production.

Claims

1. A multi-stage distillation and purification apparatus for titanium tetrachloride, characterized in that, include: A multi-stage distillation column (1) is fixedly connected to a main support (2). A reduction chamber (3) is fixedly installed below the multi-stage distillation column (1). A feed port (4) is fixedly connected to one side of the reduction chamber (3). A sealing cover (5) is fixedly connected to the other side of the reduction chamber (3). A waste discharge port (6) is fixedly connected below the reduction chamber (3). A secondary support (7) is fixedly connected to the reduction chamber (3). A sliding cavity (8) is opened inside the sealing cover (5). A baffle (9) is fixedly connected to the cavity wall of the sliding cavity (8). A fixed cover (10) is slidably connected inside the sliding cavity (8). A support plate (11) is fixedly connected to one side of the fixed cover (10). An installation plate (12) is fixedly connected inside the fixed cover (10). Multiple heat exchange tubes (13) are inserted and installed at equal intervals on the installation plate (12). A connecting cover (14) is fixedly connected to one side of the installation plate (12). A sliding groove (15) is opened inside the installation plate (12). Multiple limiting passages (16) are opened at equal intervals on the upper and lower groove walls of the sliding cavity (8). A main connecting hole (17) is opened above the sliding groove (15) on the installation plate (12). A secondary connecting hole (18) is opened below the sliding groove (15) on the installation plate (12). Sealing rings (19) are fixedly connected to the walls of the main connecting hole (17) and the secondary connecting hole (18). An I-shaped plate (20) is slidably connected in the groove (15). A connecting groove (21) is provided on one side of the I-shaped plate (20). An inclined top groove (22) is provided on both sides of the I-shaped plate (20). Multiple movable plates (23) are slidably arranged in the middle recess of the I-shaped plate (20). A clamp (24) is fixedly connected to the movable plate (23). A protruding rod (25) is fixedly connected to both sides of the movable plate (23). The connecting cover (14) overlaps on both sides of the auxiliary support (7) and a connecting seat (26) is fixedly connected below. A partition (27) is fixedly connected inside the connecting cover (14). The partition (27) is located between the main connecting hole (17) and the auxiliary connecting hole (18) and is fixedly connected to the mounting plate (12). The connecting cover (14) is provided with an inlet chamber (28) above the partition (27), and the connecting cover (14) is provided with an outlet chamber (29) below the partition (27). An inlet pipe (30) is fixedly connected to one side of the inlet chamber (28), and an outlet pipe (31) is fixedly connected to one side of the outlet chamber (29). An electric push rod (32) is fixedly installed above the support plate (11). A connecting plate (33) is fixedly connected to the movable end of the electric push rod (32). Multiple mounting slots (34) are equally spaced below the connecting plate (33). A connecting strip (35) is inserted into the mounting slot (34). A through hole (36) is opened on the connecting strip (35), and a scraping layer (37) is fixedly installed in the through hole (36).

2. The titanium tetrachloride multi-stage distillation and purification apparatus according to claim 1, characterized in that, The main support (2) is fixedly connected to the secondary support (7). A working motor (38) is fixedly installed on the secondary support (7). The output shaft of the working motor (38) is connected to a lead screw (39). A mating sleeve (40) is fixedly installed inside the connecting seat (26). The mating sleeve (40) is threadedly engaged with the lead screw (39).

3. The multi-stage distillation and purification apparatus for titanium tetrachloride according to claim 1, characterized in that, A drive motor (41) is fixedly installed on one side of the connecting cover (14). The output shaft of the drive motor (41) is connected to a connecting shaft (42). The connecting shaft (42) passes through the partition (27) and the mounting plate (12) and is rotatably connected to the partition (27) through a bearing. A rocker arm (43) is fixedly connected to one end of the connecting shaft (42) that passes through the mounting plate (12). A push rod (44) is fixedly connected to the rocker arm (43). The push rod (44) slides in the connecting groove (21).

4. The multi-stage distillation and purification apparatus for titanium tetrachloride according to claim 1, characterized in that, A rubber ring (45) is fixedly connected to one side of the baffle (9), and a fitting groove (46) is provided on one side wall of the fixing cover (10), and the baffle (9) fits into the fitting groove (46).

5. The multi-stage distillation and purification apparatus for titanium tetrachloride according to claim 1, characterized in that, The slide groove (15) is connected to the main connecting hole (17) and the secondary connecting hole (18) through the limiting through cavity (16) on the upper and lower sides. The movable plate (23) is slidably engaged with the limiting slide cavity (8). The protruding rod (25) is slidably engaged with the inclined top groove (22). The heat exchange tube (13) has an annular groove (47) on its tube wall. The end of the heat exchange tube (13) is inserted into the main connecting hole (17), the secondary connecting hole (18) and the through hole (36). The clamp (24) is fitted into the annular groove (47).

6. The multi-stage distillation and purification apparatus for titanium tetrachloride according to claim 2, characterized in that, The lead screw (39) is rotatably connected to the sub-support (7) via bearings. Telescopic covers (48) are sleeved on both ends of the lead screw (39). One end of the telescopic cover (48) is fixedly connected to the sub-support (7), and the other end of the telescopic cover (48) is fixedly connected to the connecting seat (26).

7. The multi-stage distillation and purification apparatus for titanium tetrachloride according to claim 1, characterized in that, A main threaded hole (49) is provided on the upper wall of the mounting groove (34), and a secondary threaded hole (50) is provided on the upper part of the connecting strip (35). The main threaded hole (49) and the secondary threaded hole (50) are positioned correspondingly and are connected by a bolt (51) through a common thread.

8. A method of using a multi-stage distillation and purification apparatus for titanium tetrachloride, as described in any one of claims 1-7, characterized in that... The method of use includes the following steps: During operation, heat exchange medium is injected into the inlet chamber (28) through the inlet pipe (30). After the heat exchange medium is evenly distributed in the inlet chamber (28), it flows into multiple heat exchange tubes (13) inserted on the mounting plate (12) through the main connection hole (17). During the flow of the heat exchange medium through the heat exchange tubes (13), it exchanges heat with the reaction products in the reduction chamber (3). Then it flows into the outlet chamber (29) through the secondary connection hole (18) and is finally discharged through the outlet pipe (31). When the chemical reaction is completed, the electric push rod (32) is activated to push the connecting plate (33) to slide in the reduction chamber (3). The moving connecting plate (33) synchronously drives multiple connecting strips (35) to slide on the heat exchange tube (13), and then scrapes and rubs the attachments on the outer wall of the heat exchange tube (13) through the scraping layer (37) inside the through hole (36). The debris generated during cleaning falls directly into the bottom of the reduction chamber (3). Finally, the waste debris and waste liquid are discharged through the waste outlet (6). Then, the working motor (38) drives the lead screw (39) to rotate. Then, through the threaded engagement of the fitting sleeve (40) and the lead screw (39), the connecting seat (26) drives the connecting cover (14), the mounting plate (12) and the fixing cover (10) to slide outward along the sliding cavity (8) until the fixing cover (10) and the heat exchange tube (13) are completely separated from the closed cover (5). At this time, the drive motor (41) is started, and the drive motor (41) drives the rocker (43) to rotate through the connecting shaft (42). As the rocker (43) rotates, the push rod (44) on the rocker (43) slides in the connecting groove (21) on one side of the I-shaped plate (20) and pushes the I-shaped plate (20) to move along the slide groove (15). During the process, the I-shaped plate (20) pushes the protruding rods (25) on both sides of the movable plate (23) through the inclined groove wall of the inclined top groove (22), causing the movable plate (23) to move along the limiting cavity (16) towards the I-shaped plate (20), thereby causing the clamp (24) to disengage from the annular groove (47) on the heat exchange tube (13), thereby releasing the locking of multiple heat exchange tubes (13). At this time, the operator will pull out the failed or blocked heat exchange tube (13) from the main connection hole (17), auxiliary connection hole (18) and through hole (36) on the mounting plate (12), and then replace it with a brand new or cleaned spare heat exchange tube (13). Before replacing the heat exchange tube (13), the operator will loosen the bolt (51) to separate the bolt (51) from the main thread hole (49) and auxiliary thread hole (50), thereby releasing the lock on the connecting strip (35). Then, the severely worn connecting strip (35) will be pulled out from the mounting groove (34) and replaced. After the replacement is completed, the bolt (51) will be reinserted and tightened to make the connecting strip (35) securely installed under the connecting plate (33). After re-inserting the heat exchange tube (13) into the corresponding main connection hole (17) and auxiliary connection hole (18) at both ends, thus completing the replacement of the heat exchange tube (13), the drive motor (41) is started in reverse to drive the crank handle (43) to rotate, causing the push rod (44) to push the groove wall of the connecting groove (21) to reset the I-shaped plate (20), and then the inclined top groove (22) pushes the protruding rod (25) in reverse, causing the movable plate (23) to drive the clamp (24) to move towards the heat exchange tube (13), so that the clamp (24) is engaged. The tubes are moved into the annular groove (47) to complete the synchronous locking of multiple heat exchange tubes (13). Then the working motor (38) reverses and drives the lead screw (39) to move the connecting seat (26) and the fixed cover (10) back into the sliding cavity (8), causing the fixed cover (10) to be re-embedded into the sliding cavity (8) and the baffle (9) to engage with the fitting groove (46). During the process, the rubber ring (45) on the baffle (9) is deformed by pressure and forms a seal with the fixed cover (10), and then it is put into the next round of distillation reduction production.

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