Distillation equipment for preparing high-quality silicone oil

Abstract

The invention relates to the field of molecular distillation, in particular to distillation equipment for preparing high-quality silicone oil, which comprises a frame body, a distillation cylinder arranged in the middle of the frame body, a top cover arranged at the top of the distillation cylinder, a plurality of feed ports formed in the bottom of the top cover, a heating surface arranged outside the distillation cylinder, a condenser arranged inside the distillation cylinder, and a vacuum interface formed in the right lower part of the distillation cylinder, a distillate outlet is formed in the lower right portion of the distillation cylinder, a feeding port is formed in the right portion of the top cover, a film scraping frame is rotationally connected into the distillation cylinder and slidably connected with film scraping plates, the upper portion of the film scraping frame penetrates out of the top cover, the film scraping plates are symmetrically arranged on the film scraping frame, and gaps exist between the film scraping plates and the inner wall of the distillation cylinder. Through cooperation of the film scraping frame, the film scraping plate, the first servo motor, the connecting rod, the adjusting frame and other components, a liquid film formed on the inner wall of the distillation cylinder can be more uniform, and meanwhile, the thickness of the formed liquid film can be adjusted according to materials with different viscosities, so that the downward flowing speed of the liquid film tends to be consistent, and the optimal distillation effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of molecular distillation, and more particularly to a distillation apparatus for preparing high-quality silicone oil. Background Technology

[0002] Distillation is a very important technique for producing high-quality silicone oil. Silicone oil distillation differs from ordinary essential oil distillation in that it must be carried out under vacuum. The most common distillation equipment for producing silicone oil is the molecular still. Molecular distillation is a special liquid-liquid separation technique. Unlike traditional distillation, which relies on the principle of separation based on boiling point difference, it achieves separation based on the difference in the mean free path of different molecules.

[0003] Patent publication number CN215084943U discloses a short-range molecular distillation apparatus, including a distillation cylinder, a heating jacket fitted on the outer wall of the distillation cylinder, a heating wire inside the heating jacket, a membrane cloth barrel at the top of the distillation cylinder, an electric push rod at the top of the membrane cloth barrel, a rubber piston inside the membrane cloth barrel at the movable end of the electric push rod, a fixing block two at the bottom of the rubber piston, the fixing block two being disposed on the inner wall of the membrane cloth barrel, a feed pipe penetrating one side of the membrane cloth barrel, a one-way valve inside the feed pipe, and a feed barrel penetrating the top end of the feed pipe.

[0004] When producing silicone oil using the above equipment, the material is pre-injected into the feed tank, and then slides down the inner wall of the distillation cylinder through the film-covering tank, forming a liquid film on the inner wall. The heating wire heats the material, and the light molecules that escape from the heated liquid film are the finished silicone oil. The light molecules condense into liquid through the condenser tube and flow down the condenser tube to the light component collection cup for collection. The heavy molecules, which are the heavy components, continue to slide down the inner wall and flow into the heavy component collection cup for collection. However, when the material enters the inner wall of the distillation cylinder, it may not be evenly spread on the inner wall, resulting in an uneven thickness of the liquid film. This may lead to incomplete distillation in areas with thick liquid films, while over-distillation and coking may occur in areas with thin liquid films, affecting the distillation quality. Summary of the Invention

[0005] The technical solution is as follows: A distillation device for preparing high-quality silicone oil includes a frame, a distillation cylinder in the middle of the frame, a top cover on the top of the distillation cylinder, multiple feed ports at the bottom of the top cover, a heating surface on the outside of the distillation cylinder, a condenser inside the distillation cylinder, a vacuum interface on the lower right of the distillation cylinder, a distillate outlet on the lower right of the distillation cylinder, a feed port on the right side of the top cover, a scraper frame rotatably connected inside the distillation cylinder, the scraper frame and scraper plates slidably connected, the upper part of the scraper frame protrudes through the top cover, the scraper frame has symmetrically arranged scraper plates, there is a gap between the scraper plates and the inner wall of the distillation cylinder, a first servo motor is located on the top of the top cover, the first servo motor is connected to the scraper frame through a conveyor belt, symmetrically arranged connecting rods are rotatably connected to the scraper plates close to each other on one side, an adjusting frame is set between the connecting rods, the adjusting frame and the connecting rods are rotatably connected, and the adjusting frame and the scraper frame are slidably connected.

[0006] As an improvement to the above solution, a support frame is also included. The support frame is welded to the right side of the frame body. The upper part of the support frame is connected to the first piston cylinder. The first piston cylinder is slidably connected to the first piston rod. The bottom of the first piston cylinder is connected to the feed port. The bottom of the first piston cylinder is provided with a first feed pipe.

[0007] As an improvement to the above solution, a second piston cylinder is also included. The second piston cylinder is located on the side of the support frame close to the first piston cylinder. The bottom of the second piston cylinder is connected to the feed port. A second piston rod is slidably connected inside the second piston cylinder. The bottom of the second piston cylinder is connected to the second feed pipe. The second feed pipe and the first feed pipe are interconnected.

[0008] As an improvement to the above solution, it also includes a first rack, which is fixedly connected to the end of the first piston rod, and a second rack is provided at the end of the second piston rod. A gear meshes between the second rack and the first rack, and the gear and the support frame are rotatably connected.

[0009] As an improvement to the above solution, a twisted shaft is rotatably connected to the top of the support frame, and the twisted shaft and the first rack are threadedly connected. A second servo motor is provided on the side of the support frame near the twisted shaft, and a transmission component is connected between the output shaft of the second servo motor and the bottom of the twisted shaft.

[0010] As an improvement to the above solution, the conveyor assembly consists of two pulleys and a conveyor belt. The two pulleys are respectively connected to the output shaft of the second servo motor and the bottom of the twisted shaft. Four expansion plates are slidably connected to the outside of the left pulley. Elastic wheels are fitted on the outside of the expansion plates, and the conveyor belt is wrapped around the outside of the elastic wheels.

[0011] As an improvement to the above solution, it also includes a rotating rod, which is rotatably connected to the side of the expansion plate that is close to each other. A lifting frame is set between the side of the rotating rod that is close to each other. The lifting frame and the rotating rod are rotatably connected. A threaded rod is threadedly connected to the lifting frame. The threaded rod and the support frame are rotatably connected. A worm gear is connected to the top of the threaded rod. The worm gear meshes with the worm. The worm and the support frame are rotatably connected.

[0012] The beneficial effects are as follows: 1. Through the cooperation of components such as the film scraper, film scraper, first servo motor, connecting rod and adjusting frame, the present invention can make the liquid film formed on the inner wall of the distillation cylinder more uniform. At the same time, the thickness of the liquid film can be adjusted according to the materials with different viscosities, so that the downward flow speed of the liquid film tends to be uniform, so as to achieve the best distillation effect.

[0013] 2. By driving the first piston rod to move, the present invention enables the two piston rods to alternately replace materials and convey materials with the cooperation of the transmission component. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural cross-sectional view of the first part of the present invention.

[0016] Figure 3 This is a three-dimensional structural cross-sectional view of the second part of the present invention.

[0017] Figure 4 This is a three-dimensional structural diagram of the components of the present invention, including the expansion plate, the elastic wheel, and the rotating rod.

[0018] The following are the labels in the diagram: 1. Frame, 2. Distillation cylinder, 3. Top cover, 4. Heating surface, 5. Condenser, 6. Vacuum interface, 7. Residue outlet, 8. Distillate outlet, 9. Feed inlet, 10. Feed port, 11. Scraper frame, 12. Scraper plate, 13. First servo motor, 14. Connecting rod, 15. Adjusting frame, 16. Support frame, 17. First piston cylinder, 18. First piston rod, 19. First feed pipe, 20. Second piston cylinder, 21. Second piston rod, 22. Second feed pipe, 23. First rack, 24. Second rack, 25. Gear, 26. Twist shaft, 27. Second servo motor, 28. Conveying assembly, 29. Expanding plate, 30. Elastic wheel, 31. Rotating rod, 32. Lifting frame, 33. Threaded rod, 34. Worm gear, 35. Worm. Detailed Implementation

[0019] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0020] A distillation apparatus for preparing high-quality silicone oil, such as Figure 1 As shown, the device includes a frame 1, a distillation cylinder 2 in the middle of the frame 1, a top cover 3 on the top of the distillation cylinder 2, multiple feed inlets 10 at the bottom of the top cover 3, a heating surface 4 on the outside of the distillation cylinder 2, a condenser 5 inside the distillation cylinder 2, a vacuum interface 6 on the lower right of the distillation cylinder 2, a residue outlet 7 on the lower left of the distillation cylinder 2, a distillate outlet 8 on the lower right of the distillation cylinder 2, and a feed inlet 9 on the right side of the top cover 3. The material is injected into the top cover 3 through the feed inlet 9, and then falls onto the inner wall of the distillation cylinder 2 through the feed inlets 10. The material is heated by the heating surface 4, and the condenser 5 begins to cool. The distillate, which is silicone oil, adheres to the condenser 5, falls down along the condenser 5, and finally flows out through the distillate outlet 8 for collection. The residue falls vertically down along the inner wall of the distillation cylinder 2 and flows out through the residue outlet 7 for collection.

[0021] As described in the background section, when the material falls from the feed inlet 10, it may not be evenly distributed on the inner wall of the distillation cylinder 2, resulting in an uneven thickness of the liquid film. This can lead to incomplete distillation in areas with a thicker film, while over-distillation and coking may occur in areas with a thinner film, thus affecting the distillation quality. Therefore, as... Figure 2 As shown, in this embodiment, a scraper frame 11 is rotatably connected inside the distillation cylinder 2. The top cover 3 extends through the upper part of the scraper frame 11. The scraper frame 11 is provided with symmetrically arranged scraper plates 12. There is a gap between the scraper plates 12 and the inner wall of the distillation cylinder 2. A first servo motor 13 is provided on the top of the top cover 3. The first servo motor 13 is connected to the scraper frame 11 through a conveyor belt.

[0022] The first servo motor 13 and the conveyor belt control the rotation of the scraper frame 11. The rotation of the scraper frame 11 drives the scraper plate 12 to rotate. During the downward flow of the material, due to the certain viscosity of the material, its fluidity is relatively weak. Therefore, the material flows downward very slowly. So, during the rotation of the scraper plate 12, the scraper plate 12 can scrape the material into a liquid film state and adhere it to the inner wall of the cylinder. The scraper plate 12 can scrape the material into a uniformly distributed state, avoiding uneven liquid film thickness that would affect the distillation quality.

[0023] It should be noted that during the film scraping process, the scraper 12 may scrape off the liquid film that has been attached to the inner wall of the distillation cylinder 2. This may cause the liquid film to accumulate and adhere to the scraper 12. However, as the scraper 12 rotates continuously, the liquid film adhering to the scraper 12 will be thrown back onto the inner wall of the distillation cylinder 2 due to centrifugal force.

[0024] The materials used to make silicone oil include low-viscosity and high-viscosity materials. Low-viscosity materials have good fluidity, and the liquid film they form may flow downwards into the residue outlet 7 before it is completely distilled, resulting in incomplete distillation. Therefore, it is usually necessary to thicken the liquid film formed by low-viscosity materials to prolong the time the liquid film stays on the inner wall of the cylinder. High-viscosity materials have poor fluidity and easily form a thick film, which stays on the inner wall of the cylinder for a very long time, thus affecting the distillation efficiency. Therefore, they are usually scraped into a thinner liquid film.

[0025] It should also be noted that if low-viscosity materials and high-viscosity materials are scraped into liquid films of equal thickness in a central position, there will be a problem that the flow rate of the low-viscosity material is greater than that of the high-viscosity material. As a result, the distillation effect of the two materials cannot be made to be consistent. Therefore, the liquid film formed by the low-viscosity material can be made thicker than that formed by the high-viscosity material, so that the flow rates of the two materials are made to be consistent, in order to achieve the best distillation effect.

[0026] The following is the adjustment plan:

[0027] like Figure 2 As shown, the scraper frame 11 and the scraper plate 12 are slidably connected. The scraper plates 12 are rotatably connected to symmetrically arranged connecting rods 14 on one side close to each other. An adjusting frame 15 is arranged between the connecting rods 14. The adjusting frame 15 and the connecting rods 14 are rotatably connected. The adjusting frame 15 and the scraper frame 11 are slidably connected. The upper end of the adjusting frame 15 extends through the scraper frame 11. When it is necessary to adjust the gap between the scraper plate 12 and the inner wall of the distillation cylinder 2, the adjusting frame 15 can be driven to move up and down. When the adjusting frame 15 moves down, it will move the scraper plates 12 away from each other through the connecting rods 14, so that the gap between the scraper plates 12 and the inner wall of the distillation cylinder 2 is reduced. When the adjusting frame 15 moves up, it will move the scraper plates 12 closer to each other through the connecting rods 14, so that the gap between the scraper plates 12 and the inner wall of the distillation cylinder 2 is expanded.

[0028] The feeding method typically uses a piston propulsion system, such as... Figure 3As shown, a support frame 16 is welded to the right side of the frame 1. The upper part of the support frame 16 is connected to the first piston cylinder 17. The first piston rod 18 is slidably connected inside the first piston cylinder 17. The bottom of the first piston cylinder 17 is connected to the feed port 9. By driving the first piston rod 18 to move downward, the material inside the first piston cylinder 17 is injected into the top cover 3 through the feed port 9. Subsequently, the material needs to be drawn into the first piston cylinder 17. Therefore, a first feed pipe 19 is set at the bottom of the first piston cylinder 17. The first feed pipe 19 is connected to the external material cylinder. Therefore, when the first piston rod 18 moves upward, the material in the external material cylinder will be drawn into the first piston cylinder 17 through the first feed pipe 19.

[0029] In addition, it should be noted that a one-way valve is installed on the first feed pipe 19. When the first piston rod 18 moves downward, the material will not be re-injected into the material cylinder from the first feed pipe 19. A one-way valve is also installed at the bottom discharge position of the first piston cylinder 17. When the first piston rod 18 moves upward, it can prevent the material at the feed port 9 from being re-drawn into the first piston cylinder 17.

[0030] When the first piston rod 18 moves upward to replenish material, the feeding of material to the distillation cylinder 2 will be temporarily stopped, resulting in a gap period and preventing continuous material feeding. Therefore, this embodiment adopts a dual-cylinder mode to achieve continuous material feeding, as detailed below:

[0031] like Figure 3 As shown, a second piston cylinder 20 is provided on the side of the support frame 16 near the first piston cylinder 17. The bottom of the second piston cylinder 20 is connected to the feed port 9. A second piston rod 21 is slidably connected inside the second piston cylinder 20. The bottom of the second piston cylinder 20 is connected to the second feed pipe 22. The second feed pipe 22 and the first feed pipe 19 are interconnected and connected to the external material cylinder. The first piston rod 18 and the second piston rod 21 are connected by a transmission assembly.

[0032] When the first piston rod 18 descends, it drives the second piston rod 21 to move upward through the transmission assembly. The descent of the first piston rod 18 conveys the material into the distillation cylinder 2. At the same time, the upward movement of the second piston rod 21 draws the material from the external material cylinder into the second piston cylinder 20. When the first piston rod 18 rises to replenish the material, the second piston rod 21 descends to feed the distillation cylinder 2. Therefore, the alternating operation of the first piston rod 18 and the second piston rod 21 can achieve the purpose of continuous feeding.

[0033] In addition, one-way valves are respectively installed at the discharge position at the bottom of the second piston cylinder 20 and on the second feed pipe 22. Their function is the same as the working principle of the one-way valve in the first piston cylinder 17, which will not be elaborated here.

[0034] like Figure 3As shown, the transmission assembly includes a first rack 23, which is fixedly connected to the end of the first piston rod 18. A second rack 24 is provided at the end of the second piston rod 21. A gear 25 meshes between the second rack 24 and the first rack 23. The gear 25 is rotatably connected to the support frame 16.

[0035] like Figure 2 As shown, the power source for the movement of the second piston rod 21 is as follows:

[0036] The top of the support frame 16 is rotatably connected to a twisted shaft 26, which is threadedly connected to the first rack 23. A second servo motor 27 is provided on the side of the support frame 16 near the twisted shaft 26. A transmission assembly 28 is connected between the output shaft of the second servo motor 27 and the bottom of the twisted shaft 26. The second servo motor 27 drives the transmission assembly 28 to rotate, thereby causing the twisted shaft 26 to rotate. The rotation of the twisted shaft 26 can drive the first rack 23 to move up and down, and the first rack 23 drives the first piston rod 18 to move.

[0037] As explained above, adjusting the thickness of the liquid film according to the different viscosities of the materials is to optimize distillation and ensure efficient and gentle separation of the materials on the evaporation surface. If a thick film is adjusted, the material inflow rate needs to be increased to allow a sufficient amount of material to quickly form a thick film. If the material inflow rate remains slow, the amount of material injected may not be enough to form a thick film. Conversely, if a thin film is adjusted, the material inflow rate needs to be slowed down to ensure that the amount of material entering the film is consistent with the amount of film formed. Therefore, this embodiment adopts the following solution:

[0038] like Figure 4 As shown, the conveyor assembly 28 consists of two pulleys and a conveyor belt. The two pulleys are respectively connected to the output shaft of the second servo motor 27 and the bottom of the twisted shaft 26. Four expansion plates 29 are slidably connected to the outside of the left pulley. Elastic wheels 30 are fitted on the outside of the expansion plates 29. The conveyor belt is wound around the outside of the elastic wheels 30. The rotation speed of the twisted shaft 26 is adjusted by adjusting the size of the elastic wheels 30. The larger the diameter of the elastic wheels 30, the slower the rotation speed of the twisted shaft 26. The smaller the diameter of the elastic wheels 30, the faster the rotation speed of the twisted shaft 26.

[0039] Therefore, the size of the elastic wheel 30 needs to be adjusted by moving the expansion plate 29 inward and outward, as detailed below.

[0040] like Figure 4As shown, the expansion plates 29 are rotatably connected to a rotating rod 31 on one side close to each other. A lifting frame 32 is set between the rotating rods 31 on one side close to each other. The lifting frame 32 and the rotating rod 31 are rotatably connected. A threaded rod 33 is threadedly connected to the lifting frame 32. The threaded rod 33 is rotatably connected to the support frame 16. A worm gear 34 is connected to the top of the threaded rod 33. The worm gear 34 meshes with the worm 35. The worm 35 is rotatably connected to the support frame 16.

[0041] The worm gear 35 can be rotated to drive the worm wheel 34 to rotate, which in turn drives the threaded rod 33 to rotate. The rotation of the threaded rod 33 drives the lifting frame 32 to move up and down. When the lifting frame 32 moves downward, the expanding plate 29 moves inward to reduce the diameter of the elastic wheel 30 and reduce the speed of the twisted shaft 26, thereby reducing the speed at which the material is injected into the distillation cylinder 2. When the lifting frame 32 moves upward, the expanding plate 29 moves outward to expand the diameter of the elastic wheel 30 and increase the speed of the twisted shaft 26, thereby increasing the speed at which the material is injected into the distillation cylinder 2.

[0042] In addition, the left side of the lifting frame 32 and the upper part of the adjusting frame 15 are rotatably connected. When the lifting frame 32 descends, it not only reduces the speed at which the material is injected into the distillation cylinder 2, but also drives the adjusting frame 15 to move downward, causing the scraper plate 12 to move outward and reduce the distance between the scraper plate 12 and the inner wall of the distillation cylinder 2. Conversely, when the lifting frame 32 rises, it not only increases the speed at which the material is injected into the distillation cylinder 2, but also drives the adjusting frame 15 to move upward, causing the scraper plate 12 to move inward and increase the distance between the scraper plate 12 and the inner wall of the distillation cylinder 2.

[0043] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes made to the content described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A distillation apparatus for preparing high-quality silicone oil, comprising a frame (1), a distillation cylinder (2) disposed in the middle of the frame (1), a top cover (3) disposed on the top of the distillation cylinder (2), multiple feed inlets (10) opened at the bottom of the top cover (3), a heating surface (4) disposed on the outside of the distillation cylinder (2), a condenser (5) disposed inside the distillation cylinder (2), a vacuum interface (6) disposed on the lower right side of the distillation cylinder (2), a distillate outlet (8) disposed on the lower right side of the distillation cylinder (2), and a feed inlet (9) disposed on the right side of the top cover (3), characterized in that, A scraper frame (11) is rotatably connected inside the distillation cylinder (2). The scraper frame (11) and the scraper plate (12) are slidably connected. The upper part of the scraper frame (11) extends through the top cover (3). The scraper frame (11) is provided with symmetrically arranged scraper plates (12). There is a gap between the scraper plate (12) and the inner wall of the distillation cylinder (2). The top of the top cover (3) is provided with a first servo motor (13). The first servo motor (13) is connected to the scraper frame (11) through a conveyor belt. The scraper plates (12) are rotatably connected to symmetrically arranged connecting rods (14) on one side close to each other. An adjustment frame (15) is provided between the connecting rods (14). The adjustment frame (15) and the connecting rods (14) are rotatably connected. The adjustment frame (15) and the scraper frame (11) are slidably connected.

2. The distillation apparatus for preparing high-quality silicone oil as described in claim 1, characterized in that, It also includes a support frame (16), which is welded to the right side of the frame (1). The upper part of the support frame (16) is connected to the first piston cylinder (17). The first piston rod (18) is slidably connected inside the first piston cylinder (17). The bottom of the first piston cylinder (17) is connected to the feed port (9). The bottom of the first piston cylinder (17) is provided with a first feed pipe (19).

3. The distillation equipment for preparing high-quality silicone oil as described in claim 2, characterized in that, It also includes a second piston cylinder (20), which is located on the side of the support frame (16) near the first piston cylinder (17). The bottom of the second piston cylinder (20) is connected to the feed inlet (9). A second piston rod (21) is slidably connected inside the second piston cylinder (20). The bottom of the second piston cylinder (20) is connected to the second feed pipe (22). The second feed pipe (22) and the first feed pipe (19) are connected to each other.

4. The distillation apparatus for preparing high-quality silicone oil as described in claim 3, characterized in that, It also includes a first rack (23), which is fixedly connected to the end of the first piston rod (18), and a second rack (24) is provided at the end of the second piston rod (21). A gear (25) meshes between the second rack (24) and the first rack (23), and the gear (25) is rotatably connected to the support frame (16).

5. The distillation apparatus for preparing high-quality silicone oil as described in claim 4, characterized in that, The top of the support frame (16) is rotatably connected to a twisted shaft (26), and the twisted shaft (26) and the first rack (23) are threadedly connected. The support frame (16) is provided with a second servo motor (27) on the side near the twisted shaft (26), and a transmission assembly (28) is connected between the output shaft of the second servo motor (27) and the bottom of the twisted shaft (26).

6. The distillation apparatus for preparing high-quality silicone oil as described in claim 5, characterized in that, The conveyor assembly (28) consists of two pulleys and a conveyor belt. The two pulleys are respectively connected to the output shaft of the second servo motor (27) and the bottom of the twisted shaft (26). The left pulley is externally connected to four expansion plates (29). The expansion plates (29) are fitted with elastic wheels (30). The conveyor belt is wrapped around the elastic wheels (30).

7. The distillation apparatus for preparing high-quality silicone oil as described in claim 6, characterized in that, It also includes a rotating rod (31), which is rotatably connected to the expansion plate (29) on one side close to each other. A lifting frame (32) is set between the rotating rods (31) on the one side close to each other. The lifting frame (32) and the rotating rod (31) are rotatably connected. A threaded rod (33) is threadedly connected to the lifting frame (32). The threaded rod (33) and the support frame (16) are rotatably connected. A worm wheel (34) is connected to the top of the threaded rod (33). The worm wheel (34) meshes with the worm (35). The worm (35) and the support frame (16) are rotatably connected.

Images