A molecular still

Abstract

The application relates to a molecular distiller, belonging to the technical field of molecular distillation, which comprises a cylinder, a mounting ring body and a cover assembly, a scraping mechanism, two groups of supporting mechanisms and a heating assembly. The surface of the cylinder is fixedly connected with the mounting ring body. The cover assembly is arranged at the top of the cylinder. The two groups of supporting mechanisms are arranged on the surface of the cylinder. The scraping mechanism is located at the top of the cover assembly. The heating assembly is arranged on the surface of the cylinder and located at the lower part. Through the cooperative arrangement of the cylinder, the mounting ring body, the cover assembly, the scraping mechanism, the supporting mechanism and the heating assembly, a composite scraping structure capable of realizing the up-down movement and rotation of a scraper is formed. The scraper can dynamically adjust the scraping position during the distillation process, effectively solves the problems of uneven liquid film thickness and many blind scraping areas of a traditional fixed scraper, significantly improves the liquid film uniformity and the evaporation efficiency, and simultaneously realizes the stable operation and convenient maintenance of the equipment through the cooperation of multiple assemblies.

Description

Technical Field

[0001] This invention relates to the field of molecular distillation, and more particularly to a molecular distillation apparatus. Background Technology

[0002] A molecular still is a highly efficient device that uses the difference in molecular free path to achieve liquid-liquid separation. Its core principle is to heat the material to form a liquid film, and after the light molecules evaporate, they gather and separate at the condenser plate. A traditional molecular still typically includes a cylinder, heating components, a condenser plate, and a scraping mechanism. The scraper of the scraping mechanism is driven to rotate by a rotating shaft, which uniformly scrapes the material into a thin layer to accelerate evaporation. Most existing molecular stills use scrapers of fixed height, and the liquid film is scraped by a single rotational motion. Its structure mainly consists of a drive motor, a fixed rotating shaft, and a rigid scraper, forming a circular scraping trajectory inside the cylinder, which is suitable for the separation of conventional materials.

[0003] Traditional molecular distillation apparatuses typically employ a fixed-height scraper structure, which can only achieve a single rotational motion driven by a shaft. In practical applications, this has revealed its shortcomings. The fixed-height scraper cannot dynamically adjust its scraping position. When the material evaporates due to heating, causing the liquid level to drop, the fixed scraper struggles to maintain a stable liquid film thickness. This is especially problematic in the later stages of batch distillation when the material quantity decreases, easily leading to either the scraper scraping without material or an excessively thick liquid film. The scraping trajectory of the single rotational motion is limited to the annular area in the middle of the cylinder, creating scraping blind spots at the top and bottom of the cylinder. This results in localized overheating and decomposition of the material in these areas due to the inability to promptly renew the liquid film.

[0004] The innovation of this invention patent lies in providing a scraper mechanism that can move up and down and rotate. Through mechanical structural innovation, it achieves multi-directional coverage of the scraping range and realizes three-dimensional scraping by the scraper. Compared with the traditional fixed scraper, the uniformity of the liquid film can be significantly improved, thus enhancing flexibility and uniformity of the liquid film. Summary of the Invention

[0005] 1. Technical problems to be solved

[0006] The purpose of this application is to provide a molecular distillation apparatus to solve the problem of uneven liquid film caused by rotating a scraper in a fixed position.

[0007] The molecular distillation apparatus provided in this application adopts the following technical solution: it includes a cylinder, a mounting ring and a capping assembly, a scraping mechanism, two sets of support mechanisms, and a heating assembly. The mounting ring is fixedly connected to the surface of the cylinder, the capping assembly is disposed at the top of the cylinder, the two sets of support mechanisms are disposed on the surface of the cylinder, the scraping mechanism is located at the top of the capping assembly, and the heating assembly is disposed at the lower part of the surface of the cylinder.

[0008] By adopting the above technical solution, a composite scraping structure is formed through the coordinated arrangement of the cylinder, mounting ring, sealing assembly, scraping mechanism, support mechanism and heating assembly, which enables the scraper to move up and down and rotate. This allows the scraper to dynamically adjust its scraping position during the distillation process, effectively solving the problems of uneven liquid film thickness and many scraping blind spots in traditional fixed scrapers, significantly improving liquid film uniformity and evaporation efficiency. At the same time, the cooperation of multiple components enables stable operation and convenient maintenance of the equipment.

[0009] Preferably, the scraping mechanism includes a vertical plate, a scraper body, and a threaded cylinder. The threaded cylinder is disposed on the top of the sealing assembly, and a screw is threadedly connected to the inside of the threaded cylinder. The vertical plate is fixedly connected to the top of the sealing assembly. A drive motor is disposed on one side of the vertical plate. A rotating shaft is fixedly connected to the other end of the output shaft of the drive motor. A movable plate is fixedly connected to the other end of the rotating shaft. A movable rod is movably connected to the surface of the movable plate via a pin. A connecting plate is movably connected to the other end of the movable rod via a pin. The screw is rotatably connected to the bottom of the connecting plate. Two sets of L-shaped rods are fixedly connected to the bottom of the screw. The scraper body is fixedly connected to the other end of each set of L-shaped rods.

[0010] By adopting the above technical solution, through the threaded connection between the threaded cylinder and the screw, and the pin linkage structure between the movable plate and the movable rod, the scraper body is driven to reciprocate along the axial direction while rotating, forming a composite motion trajectory of rotation and lifting. This allows the scraper to cover different height areas of the cylinder, eliminates the blind spots of scraping at the top and bottom, and improves the separation efficiency of multi-component materials.

[0011] Preferably, the sealing assembly includes a sealing cover and four sets of movable frame plates. The four sets of movable frame plates are movably connected to the surface of the mounting ring body via hinges. The top of the sealing cover has four sets of grooves. The top of the four sets of movable frame plates is threaded with a lead rod. The bottom of the lead rod is fixedly connected with a pressure plate. The four sets of pressure plates are adapted to the four sets of grooves. The top of the mounting ring body has a sealing groove. An arc-shaped retaining plate is engaged in the sealing groove. The arc-shaped retaining plate is fixedly connected to the bottom of the sealing cover. A sealing ring is provided between the arc-shaped retaining plate and the sealing groove.

[0012] By adopting the above technical solution, through the cooperation of movable frame plates, screws and pressure plates, combined with the sealing structure of arc-shaped clamping plates, sealing rings and sealing grooves, a reliable vacuum seal between the cap and the cylinder is achieved, effectively reducing the leakage rate and preventing the vacuum degree from dropping during distillation. At the same time, the quick-release structure of the four sets of movable frame plates can shorten the disassembly and assembly time of the cap assembly and improve the convenience of maintenance.

[0013] Preferably, the bottom of the sealing cover has two sets of slots, and the slots are T-shaped. Two sets of elastic sheets are engaged in both sets of slots. Springs are provided in both sets of elastic sheets. Cooling plates are provided at the bottom of both sets of elastic sheets. Two sealing cylinders are provided at the top of the sealing cover 217. Tubes are provided in both sets of sealing cylinders. Tubes are connected to two sets of cooling plates respectively. Sealing plugs are provided at the top of both sets of tubes.

[0014] By adopting the above technical solution, the cooling plate supported by the elastic sheet and spring, with the T-shaped slot, can form a snap-fit ​​structure through the elastic sheet and spring, which facilitates the installation and disassembly of the cooling plate. Combined with the tube body and sealing cylinder, the cooling medium can be circulated, and the sealing plug can block the two tube bodies to prevent leakage.

[0015] Preferably, the surface of the scraper body is provided with a guide groove, and the guide groove has a structure that is deep in the center and shallow at the edges;

[0016] By adopting the above technical solution, the flow channel structure with a deep center and shallow edges can guide the liquid film to flow along the trajectory and prolong the residence time of the liquid film in the evaporation zone.

[0017] Preferably, the surface of the cylinder is provided with guide pipes near the top and bottom, and the surface of the two sets of guide pipes is provided with valve bodies. The two sets of valve bodies are a butterfly valve and an eccentric rotary valve, respectively, and the two sets of guide pipes are a heavy phase discharge pipe and a light phase discharge pipe, respectively.

[0018] By adopting the above technical solution, the top light phase discharge pipe, combined with the butterfly valve, can quickly collect low-boiling-point components, while the bottom heavy phase discharge pipe, combined with the eccentric rotary valve, can prevent high-viscosity residual liquid from clogging the pipe, thereby achieving precise separation of light and heavy components and effectively improving product purity.

[0019] Preferably, a connecting pipe is provided on the surface of the cylinder near the bottom, and the connecting pipe is connected to a conveying pipe through a flange;

[0020] By adopting the above technical solution, the flange-connected delivery pipe can enhance its sealing performance and prevent leakage during vacuuming.

[0021] Preferably, the two sets of support mechanisms include two sets of fixing blocks, one side of each set of fixing blocks is movably connected to a connecting rod via a pin, the other end of each set of connecting rods is fixedly connected to a base plate, and the top of each set of base plates is provided with a stud.

[0022] By adopting the above technical solution, through the movable connection of the fixed block, connecting rod and base plate and the adjustment of the stud, the level of the equipment can be adaptively adjusted, enhancing the stability of the equipment in different installation scenarios, reducing the vibration amplitude, and ensuring the operating accuracy of the scraping mechanism.

[0023] Preferably, the heating assembly includes a heating pot body and a heating wire, the heating pot body is disposed on the surface of the cylinder, and the heating wire is disposed inside the heating pot body.

[0024] By adopting the above technical solution, the combination of heating pot body and electric heating wire achieves uniform heating. Combined with the dynamic scraping of scraper, the evaporation rate of materials is increased. At the same time, the heating temperature can be adjusted according to the material characteristics, making it suitable for the separation of multiple types of materials.

[0025] Preferably, the surface of the mounting ring is provided with four sets of clip frames, each of the four sets of clip frames having a clip block engaged, and the four sets of clip blocks being fixedly connected to one side of the movable frame plate.

[0026] By adopting the above technical solution, the snap-fit ​​structure between the frame and the card block enhances the connection strength between the movable frame plate and the mounting ring, preventing the cap displacement caused by vacuum negative pressure during distillation. At the same time, in conjunction with the screw pressure plate structure, the uniformity of pressure distribution on the sealing surface is improved.

[0027] 2. Beneficial effects

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. This invention provides a molecular distillation apparatus. Through the coordinated arrangement of the cylinder, mounting ring, sealing assembly, scraping mechanism, support mechanism, and heating assembly, a composite scraping structure is formed that enables the scraper to move up and down and rotate. This allows the scraper to dynamically adjust its scraping position during the distillation process, effectively solving the problems of uneven liquid film thickness and numerous scraping blind spots in traditional fixed scrapers. This significantly improves the uniformity of the liquid film and evaporation efficiency. At the same time, the cooperation of multiple components enables stable operation and convenient maintenance of the equipment, and improves the separation efficiency of multi-component materials.

[0030] 2. This invention provides a molecular distillation apparatus that achieves a reliable vacuum seal between the cap and the cylinder through the cooperation of movable frame plates, lead screws and pressure plates, combined with an arc-shaped clamping plate, sealing rings and sealing grooves, effectively reducing the leakage rate and preventing the vacuum level from dropping during distillation. At the same time, the quick-release structure of the four sets of movable frame plates can shorten the disassembly and assembly time of the cap assembly and improve the convenience of maintenance.

[0031] 3. This invention provides a molecular distillation apparatus in which a cooling plate supported by an elastic sheet and a spring is used. The groove is T-shaped, and the elastic sheet and spring can form a snap-fit ​​structure, which facilitates the installation and removal of the cooling plate. With the help of the tube body and the sealing cylinder, the cooling medium can be circulated. The sealing plug can block the two tube bodies to prevent leakage.

[0032] 4. This invention provides a molecular distillation apparatus. Through the movable connection of the fixed block, connecting rod and base plate and the adjustment of the stud, the horizontal level of the equipment can be adaptively adjusted, enhancing the stability of the equipment in different installation scenarios, reducing vibration amplitude, ensuring the operating accuracy of the scraping mechanism, and the top light phase discharge pipe with butterfly can quickly collect low boiling point components, while the bottom heavy phase discharge pipe with eccentric rotary valve can prevent high viscosity residual liquid from clogging, achieving precise separation of light and heavy components and effectively improving product purity. Attached Figure Description

[0033] Figure 1 This is a frontal cross-sectional view of the present invention.

[0034] Figure 2 This is a schematic diagram of the overall side view structure of the present invention;

[0035] Figure 3 This is a schematic diagram of the capping assembly structure of the present invention;

[0036] Figure 4 This is a schematic diagram of the scraping mechanism structure of the present invention;

[0037] Figure 5 This is a schematic diagram of the main structure of the scraper of the present invention;

[0038] Figure 6 This is a schematic diagram of the support mechanism structure of the present invention;

[0039] Figure 7 This is a schematic diagram of the heating component structure of the present invention.

[0040] The components include: 1. Cylinder body; 2. Cover assembly; 201. Movable frame plate; 202. Clip frame; 203. Clip block; 204. Groove; 205. Pressure plate; 206. Screw; 207. Sealing cylinder; 208. Tube body; 209. Sealing plug; 210. Slot; 211. Spring; 212. Elastic sheet; 213. Cooling plate; 214. Arc-shaped clip plate; 215. Sealing ring; 216. Sealing groove; 217. Sealing cover; 3. Scraping mechanism; 301. Drive motor; 302. Rotating shaft. 303. Vertical plate; 304. Movable plate; 305. Movable rod; 306. Connecting plate; 307. Threaded cylinder; 308. Screw; 309. L-shaped rod; 310. Scraper body; 311. Guide channel; 4. Support mechanism; 401. Fixing block; 402. Connecting rod; 403. Base plate; 404. Stud; 5. Heating assembly; 501. Heating pot body; 502. Heating wire; 6. Conduit; 7. Valve body; 8. Connecting pipe; 9. Flange; 10. Conveying pipe; 11. Mounting ring. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1 - Appendix Figure 7This application will be described in further detail below.

[0042] Example 1: A molecular distillation apparatus, referring to Figure 1 , Figure 2 and Figure 3 The device includes a cylinder 1, a mounting ring 11 and a capping assembly 2, a scraping mechanism 3, two sets of support mechanisms 4, and a heating assembly 5. The mounting ring 11 is fixedly connected to the surface of the cylinder 1. The capping assembly 2 is located at the top of the cylinder 1. The two sets of support mechanisms 4 are located on the surface of the cylinder 1. The scraping mechanism 3 is located at the top of the capping assembly 2. The heating assembly 5 is located at the lower part of the surface of the cylinder 1. Through the coordinated arrangement of the cylinder 1, the mounting ring 11, the capping assembly 2, the scraping mechanism 3, the support mechanisms 4, and the heating assembly 5, a composite scraping structure is formed that enables the scraper to move up and down and rotate. This allows the scraper to dynamically adjust its scraping position during the distillation process, effectively solving the problems of uneven liquid film thickness and many scraping blind spots in traditional fixed scrapers. This significantly improves the uniformity of the liquid film and the evaporation efficiency. At the same time, the cooperation of multiple components enables the stable operation and convenient maintenance of the equipment.

[0043] Example 2: A molecular distillation apparatus, referring to Figure 1 , Figure 3 and Figure 4The scraping mechanism 3 includes a vertical plate 303, a scraper body 310, and a threaded cylinder 307. The threaded cylinder 307 is located on the top of the capping assembly 2. A screw 308 is threadedly connected to the internal thread of the threaded cylinder 307. The vertical plate 303 is fixedly connected to the top of the capping assembly 2. A drive motor 301 is located on one side of the vertical plate 303. A rotating shaft 302 is fixedly connected to the other end of the output shaft of the drive motor 301. A movable plate 304 is fixedly connected to the other end of the rotating shaft 302. A movable rod 305 is movably connected to the surface of the movable plate 304 via a pin. A connecting plate 306 is movably connected to the other end of the movable rod 305 via a pin. The screw 308 is rotatably connected to the bottom of the connecting plate 306. Two sets of L-shaped rods 309 are fixedly connected to the bottom of the screw 308. The other end of 309 is fixedly connected to a scraper body 310. The sealing assembly 2 includes a sealing cover 217 and four sets of movable frame plates 201. The four sets of movable frame plates 201 are movably connected to the surface of the mounting ring 11 via hinges. The top of the sealing cover 217 has four sets of grooves 204. The top of the four sets of movable frame plates 201 is threadedly connected to a lead rod 206. The bottom of the lead rod 206 is fixedly connected to a pressure plate 205. The four sets of pressure plates 205 are adapted to the four sets of grooves 204. The top of the mounting ring 11 has a sealing groove 216. An arc-shaped retaining plate 214 is engaged in the sealing groove 216. The arc-shaped retaining plate 214 is fixedly connected to the bottom of the sealing cover 217. A sealing ring 215 is provided between the arc-shaped retaining plate 214 and the sealing groove 216. The sealing cover 217... Two sets of slots 210 are provided at the bottom, and the slots 210 are T-shaped. Two sets of elastic plates 212 are engaged in each of the two sets of slots 210. Springs 211 are provided in the two sets of elastic plates 212. Cooling plates 213 are provided at the bottom of each set of elastic plates 212. Two sealing cylinders 207 are provided at the top of the sealing cover 217. Tubes 208 are provided in each of the two sets of sealing cylinders 207. The two sets of tubes 208 are connected to the two sets of cooling plates 213 respectively. Sealing plugs 209 are provided at the top of the two sets of tubes 208. Through the threaded connection between the threaded cylinder 307 and the screw 308, and the pin linkage structure between the movable plate 304 and the movable rod 305, the scraper body 310 is driven to rotate and reciprocate along the axial direction, forming a composite motion trajectory of rotation and lifting. The scraper can cover different height areas of the cylinder 1, eliminating blind spots at the top and bottom and improving the separation efficiency of multi-component materials. Through the cooperation of the movable frame plate 201, the lead screw 206 and the pressure plate 205, combined with the sealing structure of the arc-shaped clamping plate 214, the sealing ring 215 and the sealing groove 216, a reliable vacuum seal is achieved between the cap and the cylinder 1, effectively reducing the leakage rate and preventing the vacuum degree from dropping during distillation. At the same time, the quick-release structure of the four sets of movable frame plates 201 can shorten the disassembly and assembly time of the cap assembly 2 and improve the convenience of maintenance. The cooling plate 213 supported by the elastic sheet 212 and the spring 211, with the T-shaped groove 210, can form a snap-fit ​​structure through the elastic sheet 212 and the spring 211, which facilitates the installation and removal of the cooling plate 213.The combination of pipe body 208 and sealing cylinder 207 enables the circulation of cooling medium, while the sealing plug 209 blocks both pipe bodies 208 to prevent leakage.

[0044] Example 3: A molecular distillation apparatus, referring to Figure 2 , Figure 4 and Figure 5 The surface of the scraper body 310 is provided with a guide groove 311, which has a deep center and shallow edge structure. The surface of the cylinder 1 is provided with conduits 6 near the top and bottom. The surface of the two sets of conduits 6 is provided with valve bodies 7, which are butterfly valves and eccentric rotary valves, respectively. The two sets of conduits 6 are heavy phase discharge pipes and light phase discharge pipes, respectively. The surface of the cylinder 1 is provided with a connecting pipe 8 near the bottom. The connecting pipe 8 is connected to a conveying pipe 10 through a flange 9. The deep center and shallow edge structure of the guide groove 311 can guide the liquid film to flow along the trajectory, prolonging the residence time of the liquid film in the evaporation zone. The top light phase discharge pipe, in conjunction with the butterfly valve, can quickly collect low-boiling-point components. The bottom heavy phase discharge pipe, in conjunction with the eccentric rotary valve, can prevent high-viscosity residual liquid from clogging, achieving precise separation of light and heavy components and effectively improving product purity. The conveying pipe 10 connected by the flange 9 can enhance the sealing performance and prevent leakage during vacuuming.

[0045] Example 4: A molecular distillation apparatus, referring to Figure 6 , Figure 7 and Figure 3 The two sets of support mechanisms 4 include two sets of fixing blocks 401. One side of each set of fixing blocks 401 is movably connected to a connecting rod 402 via a pin. The other end of each set of connecting rods 402 is fixedly connected to a base plate 403. The top of each set of base plates 403 is provided with a stud 404. The heating assembly 5 includes a heating pot body 501 and a heating wire 502. The heating pot body 501 is disposed on the surface of the cylinder 1. The heating wire 502 is disposed inside the heating pot body 501. The surface of the mounting ring 11 is provided with four sets of clip frames 202. Each of the four sets of clip frames 202 is fitted with a clip block 203. The four sets of clip blocks 203 are respectively fixedly connected to one side of the movable frame plate 201 via the fixing blocks 401 and the connecting rods 402. The movable connection with the base plate 403 and the adjustment of the stud 404 enable adaptive adjustment of the equipment's level, enhancing the equipment's stability in different installation scenarios, reducing vibration amplitude, and ensuring the operating accuracy of the scraping mechanism 3. The combination of the heating pot body 501 and the heating wire 502 achieves uniform heating, and the dynamic scraping of the scraper increases the material evaporation rate. At the same time, the heating temperature can be adjusted according to the material characteristics, adapting to the separation of multiple types of materials. The snap-fit ​​structure of the frame and the locking block 203 enhances the connection strength between the movable frame plate 201 and the mounting ring 11, preventing the cap displacement caused by vacuum negative pressure during distillation. At the same time, the structure of the screw 206 and the pressure plate 205 improves the uniformity of the pressure distribution on the sealing surface.

[0046] The implementation principle of this application embodiment is as follows: the cylinder 1 is fixed to the horizontal platform by the support mechanism 4, and the top stud 404 of the bottom plate 403 is screwed to fix it, so that the liquid is introduced into the cylinder 1 to avoid vibration when the scraping mechanism 3 is running. After the installation ring 11 is welded to the cylinder 1, the sealing groove 216 is aligned with the arc-shaped clamping plate 214 of the cover assembly 2, and the sealing ring 215 is embedded. When the scraping mechanism 3 is installed, the threaded cylinder 307 is fixed to the top of the cover, and the screw 308 is screwed in to ensure that the thread gap is ≤0.1mm. The drive motor 301 is fixed by the upright plate 303 to ensure that the rotating shaft 302 is coaxial with the movable plate 304. The movable rod 305 is linked to the connecting plate 306 and the cooling plate 21. 3. The tube body 208 is connected to the cooling circulation system via the T-shaped slot 210 and the elastic sheet 212. After tightening the sealing plug 209, a test is conducted to ensure no leakage. The heating pot body 501 is wrapped with heating wire 502 and covered with an insulation layer, and connected to the temperature control system. The conveying pipe 10 is connected to the external vacuum structure to ensure that the inside of the cylinder 1 is in a vacuum state. The heating component 5 is started to heat up to the initial evaporation of the material. At the same time, the cooling plate 213 is circulated with coolant. After the drive motor 301 is started, the rotating shaft 302 drives the scraper body 310 to move up and down repeatedly. The threaded cylinder 307 drives the screw 308 to move axially, realizing a combined rotation and lifting motion. For low-viscosity materials, the scraper lifting frequency is 10. The flow rate is 1000 rpm. The guide channel 311 guides the liquid film to form a spiral flow, controlling the liquid film thickness to 0.1-0.3 mm. For high-viscosity materials, the speed is reduced to 80 rpm, the stroke is increased to 15 mm, and the gap between the scraper and the evaporation surface is adjusted to 0.5 mm. After the light component evaporates, it is condensed on the cooling plate 213 and discharged through the top butterfly valve. The heavy component residual liquid is discharged through the bottom eccentric rotary valve. The vacuum degree is maintained during discharge. When the material liquid level drops, the PLC control system automatically increases the downward stroke of the screw 308, so that the scraper body 310 drops synchronously with the liquid level. During maintenance, the movable frame plate 201 and the lead screw 206 are loosened. After the pressure plate 205 is disengaged from the groove 204, the movable frame plate 201 is flipped to remove the sealing cover 217. The cooling plate 213 is quickly disassembled and cleaned through the elastic sheet 212, reducing the single maintenance time. The clamping strength of the clamping frame 202 and the clamping block 203 is checked regularly to prevent the vacuum negative pressure from causing the sealing cover to shift and to ensure uniform pressure on the sealing surface.

[0047] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A molecular distillation apparatus, comprising a cylinder (1), a mounting ring (11) and a capping assembly (2), a scraping mechanism (3), two sets of support mechanisms (4), and a heating assembly (5), characterized in that: The surface of the cylinder (1) is fixedly connected to the mounting ring (11), the capping assembly (2) is set on the top of the cylinder (1), two sets of the support mechanisms (4) are set on the surface of the cylinder (1), the scraping mechanism (3) is located on the top of the capping assembly (2), and the heating assembly (5) is set on the lower part of the surface of the cylinder (1). The scraping mechanism (3) includes a vertical plate (303), a scraper body (310), and a threaded cylinder (307). The threaded cylinder (307) is located on the top of the capping assembly (2). A screw (308) is threadedly connected to the threaded cylinder (307). The vertical plate (303) is fixedly connected to the top of the capping assembly (2). A drive motor (301) is located on one side of the vertical plate (303). A rotating shaft (302) is fixedly connected to the other end of the output shaft of the drive motor (301). (302) has a movable plate (304) fixedly connected to the other end. The surface of the movable plate (304) is movably connected to a movable rod (305) via a pin. The other end of the movable rod (305) is movably connected to a connecting plate (306) via a pin. The screw (308) is rotatably connected to the bottom of the connecting plate (306). The bottom of the screw (308) is fixedly connected to two sets of L-shaped rods (309). The other end of each set of L-shaped rods (309) is fixedly connected to a scraper body (310). The sealing assembly (2) includes a sealing cover (217) and four sets of movable frame plates (201). The four sets of movable frame plates (201) are movably connected to the surface of the mounting ring (11) by hinges. The top of the sealing cover (217) is provided with four sets of grooves (204). The top of the four sets of movable frame plates (201) is threaded with a screw rod (206). The bottom of the screw rod (206) is fixedly connected with a pressure plate (205). The four sets of pressure plates (205) are adapted to the four sets of grooves (204). The top of the mounting ring (11) is provided with a sealing groove (216). An arc-shaped clamping plate (214) is snapped into the sealing groove (216). The arc-shaped clamping plate (214) is fixedly connected to the bottom of the sealing cover (217). A sealing ring (215) is provided between the arc-shaped clamping plate (214) and the sealing groove (216). The bottom of the sealing cover (217) is provided with two sets of slots (210), and the slots (210) are T-shaped. Two sets of elastic plates (212) are engaged in both sets of slots (210). Springs (211) are provided in both sets of elastic plates (212). Cooling plates (213) are provided at the bottom of both sets of elastic plates (212). Two sealing cylinders (207) are provided at the top of the sealing cover (217). Tubes (208) are provided in both sets of sealing cylinders (207). The two sets of tubes (208) are connected to the two sets of cooling plates (213) respectively. Sealing plugs (209) are provided at the top of the two sets of tubes (208).

2. The molecular distillation apparatus according to claim 1, characterized in that: The surface of the scraper body (310) is provided with a guide groove (311), which has a structure that is deep in the center and shallow at the edge.

3. A molecular distillation apparatus according to claim 1, characterized in that: The surface of the cylinder (1) is provided with conduits (6) near the top and bottom. The surfaces of the two sets of conduits (6) are provided with valve bodies (7). The two sets of valve bodies (7) are a butterfly valve and an eccentric rotary valve, respectively. The two sets of conduits (6) are a heavy phase discharge pipe and a light phase discharge pipe, respectively.

4. A molecular distillation apparatus according to claim 1, characterized in that: A connecting pipe (8) is provided on the surface of the cylinder (1) near the bottom, and a conveying pipe (10) is provided on the connecting pipe (8) through a flange (9).

5. A molecular distillation apparatus according to claim 1, characterized in that: The two sets of support mechanisms (4) include two sets of fixing blocks (401). One side of each of the two sets of fixing blocks (401) is movably connected to a connecting rod (402) via a pin. The other end of each of the two sets of connecting rods (402) is fixedly connected to a base plate (403). The top of each of the two sets of base plates (403) is provided with a stud (404).

6. A molecular distillation apparatus according to claim 1, characterized in that: The heating assembly (5) includes a heating pot body (501) and a heating wire (502). The heating pot body (501) is disposed on the surface of the cylinder (1), and the heating wire (502) is disposed inside the heating pot body (501).

7. A molecular distillation apparatus according to claim 1, characterized in that: The surface of the mounting ring (11) is provided with four sets of card frames (202), and each of the four sets of card frames (202) is fitted with a card block (203). The four sets of card blocks (203) are respectively fixedly connected to one side of the movable frame plate (201).

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