Solvent recycling machine

Abstract

The invention relates to the technical field of solvent recovery, in particular to a solvent recovery machine. Viscous materials can be automatically cleaned without disassembling the distillation pot, so that the manual operation amount is reduced, the operation convenience is improved, and the accident rate of hardening and carbonization of residues in the distillation pot is reduced; comprising a machine box, a heating mechanism installed in the machine box, a distillation pot arranged in the middle of the heating mechanism and a stirring and scraping mechanism used for stirring and mixing a solvent in the distillation pot and cleaning viscous materials attached to the inner wall, and the heating mechanism comprises a frame body fixedly installed in the machine box, a heating cylinder installed on the frame body and a heating assembly used for heating of the heating cylinder; the stirring and scraping mechanism comprises a rotating shaft rotationally mounted in the distillation pot, a driving ring mounted in the rotating shaft in an up-down sliding manner, a driving rod integrally connected with the driving ring, a plurality of groups of inner supporting and scraping assemblies, a driver for providing power for rotation of the rotating shaft, a scraper mounted on the rotating shaft in an up-down sliding manner, and a rod frame; the inner supporting scraping assembly comprises a first supporting rod, a second supporting rod and a scraper.

Description

Technical Field

[0001] This invention relates to the technical field of solvent recovery, and in particular to a solvent recovery machine. Background Technology

[0002] As is well known, vacuum distillation solvent recovery machines are used for distilling and recovering high-boiling-point solvents (above 120℃) and solvents that are easily decomposed by heat. When the system pressure changes to a vacuum gauge pressure of -60 cmHg (-0.08 MPa), the boiling point of the solvent decreases by 30-40%, and the recovery speed and efficiency are significantly improved (for example, at a vacuum gauge pressure of -60 cmHg (-0.08 MPa), the boiling point of water decreases from 100℃ at atmospheric pressure to 60℃). Using a vacuum distillation system to recover solvents, where the solvent evaporates and separates through physical phenomena under vacuum, is the most efficient and economical method for solvent recovery.

[0003] For example, a Chinese invention patent discloses a solvent distillation recovery machine (publication (announcement) number CN107185262A), which includes a distillation kettle, a solvent recovery tank connected to the distillation kettle, a pre-condenser connected to the distillation kettle via an exhaust pipe, a condenser connected to the pre-condenser via a solvent vapor conduit, and the pre-condenser connected to the distillation kettle via a solvent return pipe. The drain port of the condenser is connected to the distillation kettle via a guide pipe. In this solvent distillation recovery machine, the distillation kettle, by connecting the pre-condenser and the condenser, completely cools the solvent vapor generated during heating of the distillation kettle, greatly improving the recovery rate of waste solvents.

[0004] However, when the inventors implemented this device, they discovered the following drawbacks: During the distillation recovery process, as low-boiling-point substances gradually evaporate, the residual solvent becomes increasingly viscous. This residual solvent adheres to the inside of the distillation pot and is difficult to clean. With continuous heating, the viscous material accumulates and forms residue in the distillation pot. The residue becomes thicker and thicker, and under high-temperature heating, it causes the residue to clump and carbonize, reducing the thermal conductivity of the distillation pot and severely reducing the recovery efficiency of the recovery machine. This can easily cause the residue to overheat and smoke, thus affecting the quality of solvent recovery. Furthermore, using a traditional scraper assembly to scrape the viscous material from the inner wall of the distillation pot is limited because the viscous material adheres to the scraper assembly due to its high viscosity. Moreover, the scraped viscous material is difficult to drain from inside and outside the distillation pot, often requiring disassembly and cleaning, which limits its usability. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a solvent recovery machine that can automatically clean viscous substances without disassembling the machine, reducing manual operation, improving ease of operation, and lowering the accident rate of residue caking and carbonization in the distillation pot.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a solvent recovery machine, comprising a chassis, a heating mechanism installed within the chassis, a distillation pot built into the center of the heating mechanism, and a stirring and scraping mechanism for stirring and mixing the solvent within the distillation pot and cleaning viscous substances adhering to the inner wall. The heating mechanism includes a frame fixedly installed within the chassis, a heating cylinder mounted on the frame, and a heating assembly for heating the heating cylinder. The distillation pot is built into the heating cylinder. The stirring and scraping mechanism includes a rotating shaft rotatably installed within the distillation pot, a drive ring slidably installed vertically within the rotating shaft, and a drive rod integrally connected to the drive ring. The system comprises multiple sets of internal support scraping assemblies, a driver that provides power for the rotation of the rotating shaft, a scraper and a rod frame that are slidably mounted on the rotating shaft, a tension spring fitted on the drive rod, a drive ring and the upper part of the rotating shaft being elastically connected by the tension spring, and a scraper and the upper part of the drive rod being integrally connected by the rod frame. Each internal support scraping assembly includes a first support rod, a second support rod, and a scraper. One end of the first support rod is hinged to the drive ring, and the other end of the first support rod is hinged to one end of the second support rod. The other end of the second support rod intersects with the bottom of the rotating shaft. The scraper is mounted on either the first or second support rod. The scraper has a housing... The distillation vessel includes a groove and a blade slit arranged corresponding to and extending vertically through the scraper; the top of the distillation vessel has an opening, and a sealing cover is hinged to the opening; furthermore, the heating component preferably uses an electromagnetic heating coil, and the heating cylinder is made of metal; the heating component can also use other heating elements such as electric heating coils or electric heating rods that have the same heating effect on the heating cylinder; the driver is preferably a geared motor, but other equivalent driving elements with a rotary driving effect can also be used; one end of the tension spring is fixedly connected to the upper part of the rotating shaft, and the other end of the tension spring is fixedly connected to the upper part of the drive ring; when the sealing cover closes the opening of the distillation vessel, the top of the drive rod... The spring is in tension when in contact with the bottom of the sealing cap; the distillation pot is provided with a distillation chamber with a double-ended constricted opening and an outward expansion in the middle, the inner wall of the distillation chamber is fitted with the first and second support rods in the open state, and the outer diameter of the scraper is fitted with the inner diameter of the constricted opening at the bottom of the distillation chamber; the scrapers on each pair of adjacent inner support scraping components are respectively located on the first and second support rods to ensure that the inner support scraping components are in the retracted state, the first and second support rods are parallel to the central axis of the rotating shaft to ensure that the scraper completely covers and scrapes away the viscous material on the inner wall of the distillation chamber; the rotating shaft is provided with a receiving groove that fits the shape of the first and second support rods.

[0007] As a preferred embodiment, a heating medium is filled between the inner wall of the heating cylinder and the outer wall of the distillation pot; a scraper that conforms to the shape of the distillation pot is rotatably mounted on the outer wall of the distillation pot, the first and second support rods are made of permanent magnet material, and the scraper is made of magnetic material; furthermore, the heating medium is preferably a liquid heat-conducting medium with good thermal conductivity, such as kerosene; the first and second support rods are preferably neodymium magnets, and the scraper can be made of a metal material with good magnetic attraction effect, such as iron or iron alloy.

[0008] As a preferred embodiment, the scraper is equipped with a plurality of evenly distributed agitating rods.

[0009] As a preferred embodiment, a ball bearing is rotatably mounted on the top of the drive rod, and a slide rail that matches the shape of the ball bearing is provided at the bottom of the sealing cover.

[0010] As a preferred embodiment, the distillation vessel is equipped with a discharge pipe extending from the bottom of the casing, and the scraper has multiple circumferentially distributed filter elements in its trough; furthermore, the filter elements are preferably semi-permeable membranes, but fine-mesh screens can also be used to ensure the passage of low-density solutions and prevent the passage of viscous particles.

[0011] As a preferred embodiment, the chassis is rotatably mounted on the base frame, and limit bolts are screwed onto the base frame.

[0012] As a preferred embodiment, a handle is installed on the chassis away from the base frame and at the rotatable connection point of the chassis, and a limit post is installed on the chassis away from the handle.

[0013] As a preferred embodiment, it also includes a distillation outlet pipe connected to the interior of the distillation pot, on which a pressure gauge is installed; furthermore, the output end of the distillation outlet pipe is connected to an external vacuum pumping device.

[0014] As a preferred embodiment, the bottom of the rotating shaft is provided with a scraper assembly that fits into the constricted opening at the bottom of the distillation pot.

[0015] As a preferred embodiment, the rod holder and the drive rod are detachably connected; furthermore, the rod holder is provided with a through hole that allows the top of the drive rod to pass through, and the drive rod is provided with a tray that is in close contact with the rod holder.

[0016] Beneficial effects

[0017] Compared with existing technologies, the present invention provides a solvent recovery machine with the following beneficial effects: In this solvent recovery machine, by pressing down the drive rod, the scraper is positioned at the constricted bottom of the distillation pot. The hinge joint of the first and second support rods moves away from the center of the rotating shaft until the scraper contacts the inner wall of the distillation pot. The sealing cover is then closed, and the top of the drive rod contacts the bottom of the sealing cover. The driver rotates the shaft, and the scraper removes the viscous material adhering to the inner wall of the distillation pot. Simultaneously, the first and second support rods agitate the solvent inside the distillation pot, ensuring uniform heating. The scraped material adheres to the scraper, and when it is necessary to clean the viscous material from the scraper... Open the sealing cover, and the drive ring moves upward under the action of the tension spring. The first and second support rods gradually approach a state parallel to the central axis of the rotating shaft until the first and second support rods are completely retracted into the rotating shaft. The rod frame drives the scraper to move upward synchronously along the outer wall of the rotating shaft. The scraper passes through the blade seam, and the viscous material on the scraper is scraped into the groove inside the scraper. At the same time, the scraper moves to the upper part of the rotating shaft and is located at the upper opening of the distillation pot. The operator can then clean the viscous material inside the scraper. The viscous material can be automatically cleaned without disassembling the machine, reducing manual operation, improving operation convenience, and reducing the accident rate of residue caking and carbonization in the distillation pot. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a top view of the structure of the present invention;

[0020] Figure 3 This is the invention Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0021] Figure 4 This is a three-dimensional structural diagram of the stirring and scraping mechanism of the present invention;

[0022] Figure 5 This is a top view schematic diagram of the stirring and scraping mechanism of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the discharge pipe of the present invention;

[0024] Figure 7 This is a three-dimensional structural diagram showing the positional relationship between the scraper and the distillation pot of the present invention;

[0025] Figure 8 This is the invention Figure 3 A magnified view of the structure at point A in the middle;

[0026] The following components are labeled in the attached diagram: 1. Chassis; 2. Distillation vessel; 3. Frame; 4. Heating cylinder; 5. Heating assembly; 6. Rotating shaft; 7. Drive ring; 8. Drive rod; 9. Driver; 10. Scraper; 11. Rod frame; 12. Tension spring; 13. First support rod; 14. Second support rod; 15. Scraper; 16. Scraper slit; 17. Sealing cover; 18. Scraper frame; 19. Stirring rod; 20. Ball bearing; 21. Slide rail; 22. Discharge pipe; 23. Filter element; 24. Base frame; 25. Limit bolt; 26. Handle; 27. Limit post; 28. Distillation outlet pipe; 29. ​​Pressure gauge; 30. Scraper assembly. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0028] As described in the background section, in a solvent distillation recovery machine, some solvents become increasingly viscous during the distillation process as low-boiling-point substances gradually evaporate. This residual solvent adheres to the inside of the distillation pot and is difficult to clean. With continuous heating, the viscous material accumulates and forms residue in the distillation pot. The residue becomes thicker and thicker, and under high-temperature heating, it causes the residue to caking and carbonize, reducing the thermal conductivity of the distillation pot and severely reducing the recovery efficiency of the recovery machine. This can easily cause the residue to overheat and smoke, thus affecting the quality of solvent recovery. Traditional scraping methods that remove the viscous material from the inner wall of the distillation pot are limited in their application because the viscous material adheres to the scraper assembly due to its high viscosity. Furthermore, the scraped viscous material is difficult to remove from the inside and outside of the distillation pot, often requiring disassembly and cleaning of the distillation pot.

[0029] To address this technical problem, the present invention provides a solvent recovery machine that is applied to solvent distillation recovery.

[0030] For details, please refer to Figure 3-5The solvent recovery machine specifically includes: a casing 1, a heating mechanism installed inside the casing 1, a distillation pot 2 built into the middle of the heating mechanism, and a stirring and scraping mechanism for stirring and mixing the solvent inside the distillation pot 2 and cleaning the viscous substances adhering to the inner wall. The heating mechanism includes a frame 3 fixedly installed inside the casing 1, a heating cylinder 4 installed on the frame 3, and a heating assembly 5 for heating the heating cylinder 4. The distillation pot 2 is built into the heating cylinder 4. The stirring and scraping mechanism includes a rotating shaft 6 rotatably installed inside the distillation pot 2, a drive ring 7 slidably installed inside the rotating shaft 6, a drive rod 8 integrally connected to the drive ring 7, multiple sets of internal support scraping assemblies, and provides power for the rotation of the rotating shaft 6. The drive unit 9, the scraper 10 and the rod frame 11 are slidably mounted on the rotating shaft 6. A tension spring 12 is sleeved on the drive rod 8. The drive ring 7 and the upper part of the rotating shaft 6 are elastically connected by the tension spring 12. The scraper 10 and the upper part of the drive rod 8 are integrally connected by the rod frame 11. The inner support scraping assembly includes a first support rod 13, a second support rod 14 and a scraper 15. One end of the first support rod 13 is hinged to the drive ring 7, and the other end of the first support rod 13 is hinged to one end of the second support rod 14. The other end of the second support rod 14 is connected to the bottom of the rotating shaft 6. The scraper 15 is mounted on the first support rod 13 or the second support rod 14. The scraper 10 is provided with a receiving groove and a groove corresponding to the scraper 15. A through-cut slit 16 is arranged vertically; the top of the distillation pot 2 has an opening, and a sealing cover 17 is hinged to the opening; furthermore, the heating component 5 preferably uses an electromagnetic heating coil, and the heating cylinder 4 is made of metal; the heating component 5 can also use other heating elements such as electric heating coils or electric heating rods that have the same heating effect on the heating cylinder 4; the driver 9 is preferably a geared motor, but the driver 9 can also use other equivalent driving elements with a rotary driving effect; one end of the tension spring 12 is fixedly connected to the upper part of the rotating shaft 6, and the other end of the tension spring 12 is fixedly connected to the upper part of the drive ring 7; when the sealing cover 17 closes the opening of the distillation pot 2, the top of the drive rod 8 and the sealing cover 17... The bottom of the 7 contacts the spring 12, which is in a stretched state. The distillation pot 2 is provided with a distillation chamber with a double-ended constricted opening and an outward expansion in the middle. The inner wall of the distillation chamber fits with the first support rod 13 and the second support rod 14 in the open state. The outer diameter of the scraper 10 fits with the inner diameter of the constricted opening at the bottom of the distillation chamber. The scrapers 15 on each pair of adjacent inner support scraping components are located on the first support rod 13 and the second support rod 14, respectively, to ensure that the inner support scraping components are in the retracted state. The first support rod 13 and the second support rod 14 are parallel to the central axis of the rotating shaft 6, ensuring that the scraper 15 completely covers and scrapes away the viscous material on the inner wall of the distillation chamber. The rotating shaft 6 is provided with a receiving groove that fits the shape of the first support rod 13 and the second support rod 14.The scraper 15 removes some of the viscous material, which adheres to the first support rod 13 and the second support rod 14. When the first support rod 13 and the second support rod 14 retract into the receiving groove on the rotating shaft 6, the viscous material on the first support rod 13 and the second support rod 14 can be scraped off, causing the viscous material to adhere to the outer wall of the rotating shaft 6. As the scraper 10 moves upward along the rotating shaft 6, it can scrape the viscous material at the rotating shaft 6 into the receiving groove on the scraper 10, thereby further improving the thoroughness of cleaning the viscous material in the distillation pot 2.

[0031] The solvent recovery machine provided by this invention, by pressing down the drive rod 8, positions the scraper 10 at the bottom constriction of the distillation pot 2. The hinge joint of the first support rod 13 and the second support rod 14 moves away from the center of the rotating shaft 6 until the scraper 15 contacts the inner wall of the distillation pot 2. The sealing cover 17 is then closed, and the top of the drive rod 8 contacts the bottom of the sealing cover 17. The driver 9 drives the rotating shaft 6 to rotate, and the scraper 15 scrapes off the viscous material adhering to the inner wall of the distillation pot 2. At the same time, the first support rod 13 and the second support rod 14 can agitate the solvent in the distillation pot 2, ensuring that the solvent is heated evenly. The scraped viscous material adheres to the scraper 15. When it is necessary to clean the viscous material on the scraper 15, the sealing cover 17 is opened, and the tension spring 12... Under the action of the drive ring 7, the first support rod 13 and the second support rod 14 gradually tend to be parallel to the central axis of the rotating shaft 6 until the first support rod 13 and the second support rod 14 are completely retracted into the rotating shaft 6. The rod frame 11 drives the scraper 10 to move upward synchronously along the outer wall of the rotating shaft 6. The scraper 15 passes through the blade slit 16 and the viscous material on the scraper 15 is scraped into the groove inside the scraper 10. At the same time, the scraper 10 moves to the upper part of the rotating shaft 6 and is located at the upper opening of the distillation pot 2. The operator can clean the viscous material in the scraper 10. The viscous material can be automatically cleaned without disassembling the machine, reducing the amount of manual operation, improving the convenience of operation, and reducing the accident rate of residue caking and carbonization in the distillation pot 2.

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] Example 1

[0036] Please refer to Figure 3 and Figure 7A solvent recovery machine includes a housing 1, a heating mechanism installed within the housing 1, a distillation pot 2 built into the center of the heating mechanism, and a stirring and scraping mechanism for stirring and mixing the solvent in the distillation pot 2 and cleaning the viscous substances adhering to the inner wall. The heating mechanism includes a frame 3 fixedly installed within the housing 1, a heating cylinder 4 installed on the frame 3, and a heating assembly 5 for heating the heating cylinder 4. The distillation pot 2 is built into the heating cylinder 4. The stirring and scraping mechanism includes a rotating shaft 6 rotatably installed within the distillation pot 2, a drive ring 7 slidably installed within the rotating shaft 6, a drive rod 8 integrally connected to the drive ring 7, multiple sets of internal support scraping assemblies, a driver 9 providing power for the rotation of the rotating shaft 6, a scraper 10 slidably installed on the rotating shaft 6, and a rod frame 11. A tension spring 12 is sleeved on the drive rod 8. The drive ring 7 and the upper part of the rotating shaft 6 are elastically connected by the tension spring 12. The scraper 10 and the upper part of the drive rod 8 are integrally connected by the rod frame 11. The internal support scraping assembly includes a first support rod 1. 3. The second support rod 14 and the scraper 15 are as follows: one end of the first support rod 13 is hinged to the drive ring 7, and the other end of the first support rod 13 is hinged to one end of the second support rod 14. The other end of the second support rod 14 is connected to the bottom of the rotating shaft 6. The scraper 15 is mounted on the first support rod 13 or the second support rod 14. The scraper 10 is provided with a receiving groove and a blade slit 16 that is arranged corresponding to the scraper 15 and runs vertically through it. The top of the distillation pot 2 is provided with an opening, and a sealing cover 17 is hinged to the opening. A heating medium is filled between the inner wall of the heating cylinder 4 and the outer wall of the distillation pot 2. A scraper frame 18 that fits the shape of the distillation pot 2 is rotatably mounted on the outer wall of the distillation pot 2. The first support rod 13 and the second support rod 14 are made of permanent magnet material, and the scraper frame 18 is made of magnetic material. Furthermore, the heating medium is preferably a liquid heat-conducting medium with good thermal conductivity, such as kerosene. The first support rod 13 and the second support rod 14 are preferably neodymium magnets, and the scraper frame 18 can be made of a metal material with good magnetic attraction, such as iron or iron alloy.

[0037] The solvent recovery machine provided in this embodiment heats the heating medium in the heating cylinder 4 through the heating component 5, while the distillation pot 2 is completely immersed in the heating medium, which can improve the heating uniformity of the distillation pot 2, thereby improving the distillation effect of the recovered solvent in the distillation pot 2 and preventing uneven heating of the solvent. When the rotating shaft 6 drives the inner support scraping component to rotate, the magnetic attraction between the first support rod 13 and the second support rod 14 and the scraper 18 can drive the scraper 18 to rotate. During the rotation, the scraper 18 can scrape off the sediment in the heating medium on the outer wall of the distillation pot 2, reducing the adhesion of sediment and other substances on the outer wall of the distillation pot 2, thereby ensuring the good thermal conductivity of the distillation pot 2.

[0038] Example 2

[0039] The solvent recovery machine provided in Example 1 has been further optimized, specifically, as follows: Figure 3 and Figure 7 As shown, multiple evenly distributed stirring rods 19 are installed on the scraper frame 18.

[0040] The solvent recovery machine provided in this embodiment can mix and agitate the heating medium through the stirring rod 19, thereby further improving the temperature uniformity of the heating medium in the heating cylinder 4 and ensuring that the solvent in the distillation pot 2 is heated evenly.

[0041] Example 3

[0042] The solvent recovery machine provided in Example 1 or 2 is further optimized, such as... Figure 3 and Figure 7 As shown, a ball bearing 20 is rotatably mounted on the top of the drive rod 8, and a slide 21 that fits the shape of the ball bearing 20 is provided at the bottom of the sealing cover 17; furthermore, a hemispherical groove that fits the ball bearing 20 is provided in the middle of the slide 21.

[0043] In the solvent recovery machine provided in this embodiment, the ball bearing 20 is slidably installed in the slide rail 21. When it is necessary to move the drive rod 8 to the bottom of the rotating shaft 6, the sealing cover 17 can be closed, allowing the ball bearing 20 to slide in the slide rail 21, thereby making it easier to press down and move the drive rod 8. After the sealing cover 17 is completely closed with the distillation pot 2, the ball bearing 20 enters the hemispherical groove. The sealing cover 17 can limit the drive rod 8 to prevent it from moving upward automatically. The drive rod 8 and the sealing cover 17 are in rotational contact through the ball bearing 20, which can reduce the resistance during the rotation of the rotating shaft 6. At the same time, the hemispherical groove limits the ball bearing 20, restricting the rotation trajectory of the upper part of the drive rod 8, thereby improving the rotational stability of the rotating shaft 6, preventing excessive shaking of the rotating shaft 6 during rotation, and reducing the wear rate of the rotating shaft 6.

[0044] Specifically, a discharge pipe 22 extending from the bottom of the casing 1 is installed on the distillation pot 2, and multiple circumferentially distributed filter elements 23 are provided in the container of the scraper 10; furthermore, the filter elements 23 are preferably semi-permeable membranes, but fine mesh screens can also be used to ensure the passage of low-density solutions and prevent viscous particles from passing through; the purified liquid in the solvent distillation process is filtered through the filter elements 23 and discharged and collected through the discharge pipe 22, while the viscous substances produced during distillation are left in the container of the scraper 10 to prevent the viscous substances from entering the discharge pipe 22 at the bottom of the distillation pot 2, so as to prevent the viscous substances from clogging the discharge pipe 22.

[0045] Specifically, it also includes a base frame 24, on which the housing 1 is rotatably mounted. Limit bolts 25 are screwed onto the base frame 24. When it is necessary to discharge the residual pure liquid after distillation in the distillation pot 2, the housing 1 can be rotated so that the outlet end of the discharge pipe 22 faces downward, thereby completely draining the residual pure liquid in the distillation pot 2, improving the smoothness of the pure liquid discharge, and effectively reducing the residue of pure liquid in the distillation pot 2. The limit bolts 25 can lock and limit the housing 1 after rotation and adjustment, so that the operator does not need to apply force to the housing 1 for a long time and keep the housing 1 in an inclined state.

[0046] Specifically, a handle 26 is installed on the chassis 1 at the rotatable connection point with the base frame 24, and a limit post 27 is installed on the chassis 1 at the location away from the handle 26. The operator can apply force to the chassis 1 through the handle 26, thereby making it easier and less strenuous to rotate and adjust the chassis 1. The limit post 27 can limit the rotation angle of the chassis 1 to prevent the chassis 1 from rotating excessively, so that the outlet end of the discharge pipe 22 is facing downwards, further improving the ease of operation.

[0047] Specifically, it also includes a distillation outlet pipe 28 connected to the inside of the distillation pot 2, and a pressure gauge 29 is installed on the distillation outlet pipe 28; furthermore, the output end of the distillation outlet pipe 28 is connected to an external vacuum device; the gaseous material generated by distillation is discharged through the distillation outlet pipe 28, and the distillation pot 2 can also be evacuated by the external vacuum device through the distillation outlet pipe 28, while the pressure gauge 29 can monitor the real-time pressure inside the distillation pot 2.

[0048] Specifically, the bottom of the rotating shaft 6 is provided with a scraper assembly 30 that fits into the constricted opening at the bottom of the distillation pot 2; the scraper assembly 30 can agitate the purified liquid at the constricted opening at the bottom of the distillation pot 2, thereby improving the smoothness of the purified liquid discharge at the discharge pipe 22 and reducing the amount of purified liquid adhering to the constricted opening at the bottom of the distillation pot 2.

[0049] Specifically, the rod holder 11 is detachably connected to the drive rod 8; furthermore, the rod holder 11 is provided with a through hole that allows the top of the drive rod 8 to pass through, and the drive rod 8 is provided with a tray that is in close contact with the rod holder 11; when it is necessary to clean the viscous material collected in the scraper 10, the rod holder 11 can be lifted directly upwards, so that the rod holder 11 and the scraper 10 can be removed from the distillation pot 2 to clean the viscous material, further improving the convenience of cleaning the viscous material collected in the scraper 10.

[0050] The solvent recovery machine provided by this invention operates as follows: Solvent is injected into the distillation pot 2, and the sealing cover 17 is closed. The sealing cover 17 applies downward pressure to the drive rod 8, causing the scraper 10 to be located at the constricted bottom of the distillation pot 2. The hinge joint of the first support rod 13 and the second support rod 14 moves away from the center of the rotating shaft 6 until the scraper 15 contacts the inner wall of the distillation pot 2. The sealing cover 17 is fully closed, and the ball bearing 20 at the top of the drive rod 8 contacts the hemispherical groove in the slide 21 at the bottom of the sealing cover 17. The driver 9 drives the rotating shaft 6 to rotate, and the scraper 15 scrapes off the viscous material adhering to the inner wall of the distillation pot 2. At the same time, the first support rod 13 and the second support rod 14 can agitate the solvent in the distillation pot 2, so that the solvent is heated evenly. The scraped viscous material adheres to the inner wall of the distillation pot 2. When it is necessary to clean the viscous material on the scraper 15, the sealing cover 17 is opened. Under the action of the tension spring 12, the drive ring 7 moves upward. The first support rod 13 and the second support rod 14 gradually move towards a state parallel to the central axis of the rotating shaft 6 until the first support rod 13 and the second support rod 14 are completely retracted into the rotating shaft 6. The viscous material on the first support rod 13 and the second support rod 14 is left on the outer wall of the rotating shaft 6. The rod frame 11 drives the scraper 10 to move upward synchronously along the outer wall of the rotating shaft 6. The scraper 15 passes through the blade slit 16. The viscous material on the scraper 15 and the outer wall of the rotating shaft 6 is scraped into the groove inside the scraper 10. The operator lifts the rod frame 11 to remove the scraper 10 from the distillation pot 2 and cleans the viscous material inside the scraper 10.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A solvent recovery machine, characterized in that, Includes a chassis (1), a heating mechanism installed in the chassis (1), a distillation pot (2) built into the middle of the heating mechanism, and a stirring and scraping mechanism for stirring and mixing the solvent in the distillation pot (2) and cleaning the viscous substances adhering to the inner wall; The heating mechanism includes a frame (3) fixedly installed in the chassis (1), a heating cylinder (4) installed on the frame (3), and a heating assembly (5) for heating the heating cylinder (4). The distillation pot (2) is built into the heating cylinder (4). The stirring and scraping mechanism includes a rotating shaft (6) rotatably installed in the distillation pot (2), a drive ring (7) slidably installed in the rotating shaft (6), a drive rod (8) integrally connected with the drive ring (7), multiple sets of internal support scraping components, a driver (9) that provides power for the rotation of the rotating shaft (6), a scraper (10) slidably installed on the rotating shaft (6), and a rod frame (11). A tension spring (12) is sleeved on the drive rod (8). The upper part of the drive ring (7) and the rotating shaft (6) are elastically connected by the tension spring (12). The upper part of the scraper (10) and the drive rod (8) are integrally connected by the rod frame (11). The inner support scraping assembly includes a first support rod (13), a second support rod (14), and a scraper (15). One end of the first support rod (13) is hinged to the drive ring (7), and the other end of the first support rod (13) is hinged to one end of the second support rod (14). The other end of the second support rod (14) is connected to the bottom of the rotating shaft (6). The scraper (15) is mounted on the first support rod (13) or the second support rod (14). The scraper (10) is provided with a receiving groove and a blade slit (16) that is arranged corresponding to the scraper (15) and runs vertically through it. The top of the distillation pot (2) is provided with an opening, and a sealing cover (17) is hinged to the opening.

2. The solvent recovery machine according to claim 1, characterized in that, A heating medium is poured between the inner wall of the heating cylinder (4) and the outer wall of the distillation pot (2); a scraper (18) that fits the shape of the distillation pot (2) is rotatably installed on the outer wall of the distillation pot (2); the first support rod (13) and the second support rod (14) are made of permanent magnet material, and the scraper (18) is made of magnetic material.

3. The solvent recovery machine according to claim 2, characterized in that, The scraper (18) is equipped with a plurality of evenly distributed agitating rods (19).

4. The solvent recovery machine according to claim 1 or 3, characterized in that, The top of the drive rod (8) is rotatably mounted with a ball (20), and the bottom of the sealing cover (17) is provided with a slide (21) that fits the shape of the ball (20).

5. The solvent recovery machine according to claim 1, characterized in that, The distillation pot (2) is equipped with a discharge pipe (22) extending from the bottom of the casing (1), and the scraper (10) is provided with a plurality of circumferentially distributed filter elements (23) in the trough.

6. The solvent recovery machine according to claim 5, characterized in that, It also includes a base frame (24), on which the chassis (1) is rotatably mounted, and a limit bolt (25) is screwed onto the base frame (24).

7. The solvent recovery machine according to claim 6, characterized in that, A handle (26) is installed on the chassis (1) away from the base frame (24) at the rotatable connection point with the chassis (1), and a limit post (27) is installed on the chassis (1) away from the handle (26).

8. The solvent recovery machine according to claim 1, characterized in that, It also includes a distillation outlet pipe (28) that communicates with the interior of the distillation pot (2), and a pressure gauge (29) is installed on the distillation outlet pipe (28).

9. The solvent recovery machine according to claim 1, characterized in that, The bottom of the rotating shaft (6) is provided with a scraper assembly (30) that fits into the constricted opening at the bottom of the distillation pot (2).

10. The solvent recovery machine according to claim 1, characterized in that, The rod frame (11) is detachably connected to the drive rod (8).

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