A rectification purification device for DMF waste liquid treatment

Abstract

The present application belongs to the technical field of DMF waste liquid treatment, and relates to a rectification and purification device for DMF waste liquid treatment. The present application comprises a shell, a first tank body and a heating base. An exhaust pipe is arranged at the upper part of the shell, and a liquid discharge pipe is arranged at the bottom of the shell. A second tank body is arranged in the shell and moves up and down, and cooperates with the first tank body. The heating base cooperates with the first tank body. Two cleaning assemblies are arranged in the shell and move up and down; one of the cleaning assemblies is arranged directly below the first tank body. When the heating base moves along the first tank body, the inner wall of the first tank body is scraped and cleaned. When the heating base moves along the chain to the second scraping piece, the side containing the residues is turned downward, so that the residues flow out. The scraping piece rotates to clean the heating base. The first heating base and the second heating base alternately cooperate with the first tank body, so that the cleaning of the heating base and the rectification and purification can be carried out at the same time, which is beneficial to improving the rectification efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of DMF waste liquid treatment, and relates to a rectification and purification device for DMF waste liquid treatment. BACKGROUND

[0002] DMF is widely used in the fields of polyurethane synthesis, pharmaceuticals, polymer material production and the like as an excellent industrial solvent, and a large amount of DMF waste liquid is generated in the use process. In order to realize resource recycling, reduce production cost and reduce environmental pollution, the waste liquid usually needs to be purified and recovered through a rectification process.

[0003] Due to the complex composition of DMF waste liquid, high-viscosity impurities such as high-molecular polymers and oils are often contained, and in the rectification heating process, these substances are easy to adhere to the inner wall of the tank, affecting the efficiency of subsequent rectification and the quality of recovered products. At present, a scraper is usually provided to clean the inner wall of the tank. The traditional scraper is mainly used for scraping and cleaning the sidewall of the tank. After rectification is completed, due to the poor flowability of the residual material, the residual material on the bottom wall of the tank is not easy to clean by simple scraping operation, which is not conducive to improving the rectification efficiency and affects the quality of the recovered products. At the same time, the scraper itself is also easy to adhere to the material, which becomes another cleaning difficulty.

[0004] To solve the above problems, the application provides a rectification and purification device for DMF waste liquid treatment. SUMMARY

[0005] To solve the problems in the background art, the application provides a rectification and purification device for DMF waste liquid treatment.

[0006] In order to achieve the above purpose, the technical scheme adopted by the application is as follows:

[0007] A rectification and purification device for DMF waste liquid treatment, comprising a shell, a first tank and a heating base; the upper part of the shell is provided with an exhaust pipe, and the bottom of the shell is provided with a liquid discharge pipe;

[0008] The first tank is fixedly installed in the shell, and a second tank cooperating with the first tank is movably arranged in the shell;

[0009] The heating base is movably arranged in the shell in cooperation with the first tank; a driving assembly for driving the heating base to move along a rectangular trajectory is installed in the shell; a telescopic piece in plug-in cooperation with the heating base is arranged on the driving assembly; and annular protrusions are arranged on the upper and lower sides of the heating base.

[0010] Two cleaning assemblies are movably arranged in the shell; one of the cleaning assemblies is arranged directly below the first tank.

[0011] Further, the cleaning assembly comprises an electric telescopic rod and a scraping piece; the electric telescopic rod is installed at the bottom of the shell; the telescopic end of the electric telescopic rod is vertically upward and rotationally connected with the scraping piece.

[0012] Further, an annular cleaning pipe for cleaning the inner wall of the first tank is installed on the telescopic shaft of the electric telescopic rod below the first tank; a cleaning pipe for cleaning the heating base is installed on the electric telescopic rod.

[0013] Further, first sliding grooves are formed on the upper and lower sides of the heating base, and rectangular blocks are elastically and slidably arranged in the first sliding grooves; second sliding grooves are formed on the scraping piece below the first tank, and magnets are movably arranged in the second sliding grooves; the magnets are in adsorptive cooperation with the rectangular blocks, and the scraping piece is provided with a third electric telescopic rod for driving the magnets to move up and down.

[0014] Further, the driving assembly has two, and the two driving assemblies are symmetrically arranged on the two sides of the first tank; each driving assembly comprises a chain and four sprockets, the sprockets are rotationally installed on the inner wall of the shell, the four sprockets are separately arranged at the four corners of the rectangular track, the chain is wound between the four sprockets, and the telescopic piece is installed on the chain.

[0015] Further, the telescopic piece comprises a sliding sleeve and a sliding rod; one end of the sliding sleeve is fixedly connected with the chain, and the sliding rod is limitingly and slidably arranged in the sliding sleeve; an electric control push rod for driving the sliding rod to slide is arranged in the sliding sleeve.

[0016] Further, a limiting groove matched with the telescopic piece is formed on the heating base, a second electrically conductive sheet is arranged in the limiting groove, an electric heating sheet is arranged in the heating base, and the electric heating sheet and the second electrically conductive sheet are in contact.

[0017] Further, the scraping piece comprises a scraper, the scraper comprises a first plate segment and a second plate segment, the first plate segment and the second plate segment are fixedly connected, the first plate segment is matched with the end face of the heating base, and the second plate segment is matched with the inner side of the protrusion.

[0018] Further, the heating base has two.

[0019] Further, two telescopic pieces are installed on the chain at intervals, and a first electrically conductive sheet matched with the second electrically conductive sheet is installed on one of the telescopic pieces.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] The first heating base scrapes the inner wall of the first tank body when moving upwards along the first tank body, and the scraped residues fall into the accommodating cavity on the first heating base, and then the first heating base with the residues is turned upside down when moving to above the second scraping member along the chain, so that the residues flow out. Then the first heating base is scraped by the second scraping member. This helps to improve the rectification efficiency and the quality of the recovered product.

[0022] When the second heating base moves downwards along the inner wall of the first tank body, the inner wall of the first tank body is scraped again, improving the cleaning effect of the first tank body. And the residues adhered to the second heating base can be cleaned by the first scraping member.

[0023] The first heating base and the second heating base are alternately matched with the first tank body, so that the cleaning and rectification of the heating base can be carried out at the same time, which is beneficial to improve the rectification efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic view of the internal structure of the shell in the first direction of the shell;

[0025] Figure 2 is a schematic view of the internal structure of the shell in the second direction of the shell;

[0026] Figure 3 is a sectional view of the first heating base in the application;

[0027] Figure 4 is an enlarged view of A of the first heating base in the application; Figure 3

[0028] Figure 5 is a schematic view of the structure of the chain in the application;

[0029] Figure 6 is a schematic view of the structure of the first scraping member in the application;

[0030] Figure 7 is a perspective view of the first heating base in the application;

[0031] Figure 8 is a simplified view of the state of the first heating base and the second heating base at the beginning in the application;

[0032] Figure 9 is a simplified view of the state of the second telescopic member when it is in the corresponding position of the second heating base in the application;

[0033] Figure 10 is a simplified view of the state of the first heating base when it moves to above the first tank body in the application;

[0034] Figure 11 ​This is a simplified diagram of the state when the second heating base moves above the first tank in this invention;

[0035] Figure 12 This is a simplified diagram of the state when the second heating base moves to the lower end of the first tank in this invention;

[0036] Figure 13 This is a simplified diagram showing the state when the first heating base and the second scraper are engaged in the present invention.

[0037] In the diagram: 1. Shell; 2. First tank; 3. Second tank; 4. Cylinder; 5. Exhaust pipe; 6. Inlet pipe; 7. Drain pipe; 8. Chain; 9. Sprocket; 10. Servo motor; 11. First telescopic component; 12. Second telescopic component; 13. Second sliding groove; 14. First energized plate; 15. First heating base; 16. Second heating base; 17. Heating element; 18. Limiting groove; 19. Second energized plate; 20. Rectangular block; 21. Tension spring; 22. First electric telescopic rod; 23. First motor; 24. First scraper; 25. Second electric telescopic rod; 26. Second motor; 27. Second scraper; 28. Third electric telescopic rod; 29. ​​Magnet; 30. Cleaning pipe; 31. Annular cleaning pipe. Detailed Implementation

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

[0039] Example 1: As Figures 1-13 As shown, the technical solution adopted by the present invention is as follows: A distillation and purification device for DMF waste liquid treatment includes a shell 1, a first tank 2, and a heating base. An exhaust pipe 5 is fixedly installed on the upper part of the shell 1. A drain pipe 7 is installed on the lower part of the shell 1.

[0040] The first tank 2 is fixedly installed inside the shell 1. Both the upper and lower ends of the first tank 2 are open. A second tank 3 is vertically movable inside the shell 1, and a cylinder 4 is installed inside the shell 1 to drive the second tank 3 to move up and down. The lower end of the second tank 3 mates with the first tank 2, and the upper end of the second tank 3 mates with the exhaust pipe 5. The first tank 2 is provided with a liquid inlet pipe 6, through which the DMF waste liquid to be purified by distillation is injected into the first tank 2.

[0041] The heating base is movably arranged in the shell 1, and is arranged in cooperation with the first tank body 2 and used for plugging the lower end of the first tank body 2. Annular protrusions are fixedly arranged on the upper and lower sides of the heating base, so that the upper and lower sides of the heating base are formed with accommodating cavities. The annular protrusions are arranged in an inclined manner on the side close to the axis of the heating base. When the heating base slides along the inner wall of the first tank body 2, the inner wall of the first tank body 2 is scraped and cleaned. The heating base is provided with an electric heating sheet 17.

[0042] The shell 1 is provided with a driving assembly for driving the heating base to move along the rectangular track. The driving assembly has two, and the two driving assemblies are symmetrically arranged on the two sides of the first tank body 2.

[0043] Each driving assembly comprises a chain 8 and four sprockets 9. The four sprockets 9 are rotatably installed on the shell 1, and the four sprockets 9 are arranged at the four corners of the rectangular track. The chain 8 is arranged between the four sprockets 9. A servo motor 10 is installed on the shell 1, and the output shaft of the servo motor 10 is fixedly connected with one of the sprockets 9.

[0044] The chain 8 is provided with a telescopic piece inserted and matched with the heating base. Specifically, the telescopic piece comprises a sliding sleeve and a sliding rod. One end of the sliding sleeve is fixedly connected with the chain 8, and the sliding rod is limitingly and slidably arranged in the sliding sleeve. The sliding sleeve is provided with an electric control push rod for driving the sliding rod to slide. The heating base is provided with a limiting groove 18 matched with the sliding rod. When the sliding rod is inserted into the limiting groove 18, the chain 8 is moved, and the chain 8 drives the heating base to move through the telescopic piece.

[0045] As shown in Figure 5 The chain 8 is provided with two telescopic pieces arranged at intervals. The two telescopic pieces are a first telescopic piece 11 and a second telescopic piece 12. The end of the sliding rod of the second telescopic piece 12 is provided with a first electrically conductive sheet 14. The first electrically conductive sheet 14 is connected with a power supply. The limiting groove 18 is provided with a second electrically conductive sheet 19 in contact with the electric heating sheet 17. When the second telescopic piece 12 is inserted into the limiting groove 18, the first electrically conductive sheet 14 is in contact with the limiting groove 18, and at this time, the power supply is turned on, the electric heating sheet 17 is electrified and heated. In turn, the DMF waste liquid in the first tank body 2 is heated to be subjected to rectification and purification treatment.

[0046] The heating base is provided with two, and the two heating bases are alternately matched with the first tank body 2.

[0047] The shell 1 is provided with two cleaning assemblies. One of the cleaning assemblies is arranged directly below the first tank body 2. The other cleaning assembly is arranged on one side of the first tank body 2.

[0048] The two cleaning assemblies are identical in structure, and each of the cleaning assemblies comprises an electric telescopic rod and a scraping member. The electric telescopic rod is fixedly installed at the bottom of the first tank body 2, and the telescopic end of the electric telescopic rod is vertically upward. The scraping member is rotatably installed on the telescopic end of the electric telescopic rod. The upper end of the electric telescopic rod is fixedly installed with a motor for driving the scraping member to rotate. The scraping member comprises a plurality of scraping plates which are circumferentially distributed and one end of which is fixedly connected to the center of the scraping member. The scraping plate comprises a first plate segment and a second plate segment which are fixedly connected. The first plate segment cooperates with the end face of the heating base, and the second plate segment cooperates with the inner side of the protrusion.

[0049] When the electric telescopic rod below the first tank body 2 is elongated, the electric telescopic rod pushes the corresponding heating base along the inner wall of the first tank body 2 upward through the scraping member, and the heating base scrapes and cleans the inner wall of the first tank body 2.

[0050] A second sliding groove 13 is formed in the scraping member, a magnet 29 is slidably arranged in the second sliding groove 13 in an up-down direction, and a third electric telescopic rod 28 is installed in the second sliding groove 13 for driving the magnet 29 to move up and down. First sliding grooves are formed at the upper and lower ends of the heating base, a rectangular block 20 is slidably arranged in the first sliding grooves, the rectangular block 20 is fixedly connected with a tension spring 21, a spring groove for accommodating the tension spring 21 is formed in the bottom wall of the first sliding groove, and one end of the tension spring 21 away from the rectangular block 20 is fixedly connected with the bottom wall of the spring groove. A first stop block is fixedly arranged on the inner wall of one end of the first sliding groove away from the spring groove, and a second stop block is fixedly connected with the first stop block on one end of the rectangular block 20 close to the tension spring 21. The magnet 29 is adsorptively matched with the rectangular block 20.

[0051] When the heating base is on the cleaning assembly, the magnet 29 is in contact with the rectangular block 20, so that the magnet 29 slides into the second sliding groove 13, the magnet 29 pulls the rectangular block 20 to move into the second sliding groove 13 through adsorption force, so that the upper part of the rectangular block 20 is in the first sliding groove and the lower part of the rectangular block 20 is in the second sliding groove 13, and the heating base and the corresponding cleaning assembly are connected together.

[0052] Working principle: in order to facilitate the description, in the cleaning assembly directly below the first tank body 2, the electric telescopic rod is named as the first electric telescopic rod 22, the motor is named as the first motor 23, and the scraping assembly is named as the first scraping member 24. In another cleaning assembly, the electric telescopic rod is named as the second electric telescopic rod 25, the motor is named as the second motor 26, and the scraping assembly is named as the second scraping member 27. The two heating bases are respectively named as the first heating base 15 and the second heating base 16.

[0053] At the beginning, the rectangular block 20 is flush with the outer surface of the heating base. The rectangular block 20 at the lower end of the heating base is adsorbed with the corresponding magnet 29. The first heating base 15 is at the lower end of the first tank body 2 and seals the lower end of the first tank body 2. The second telescopic member 12 is inserted into the limiting slot 18 on the first heating base 15, and the first electric heating sheet 14 is in contact with the second electric heating sheet 19. The first telescopic member 11 is inserted into the limiting slot 18 on the second heating base 16. The first scraping member 24 is tightly attached to the bottom of the first heating base 15, and the second scraping member 27 is tightly attached to the bottom of the second heating base 16. The lower end of the second tank body 3 is connected to the upper end of the first tank body 2.

[0054] In use, the DMF waste liquid is injected into the first tank body 2 through the liquid inlet pipe 6, and after the injection is completed, the liquid surface is lower than the upper end of the first tank body 2. Then, the power supply is started, and the electric heating sheet 17 is electrified, thereby heating the DMF waste liquid in the first tank body 2. The DMF waste liquid is heated to produce vaporization and is discharged to the condensing equipment through the exhaust pipe 5 for condensation.

[0055] After the rectification is completed, the power supply is turned off, the electric heating sheet 17 on the first heating base 15 is de-energized, and the heating is stopped. The residue after rectification remains at the bottom of the first tank body 2 and adheres to the inner wall of the first tank body 2. At this time, the liquid surface in the containing cavity is lower than the upper end of the containing cavity. In order to improve the subsequent rectification efficiency and ensure the quality of the recovered product, the heating base and the inner wall of the first tank body 2 need to be cleaned.

[0056] When the heating base and the inner wall of the first tank body 2 are cleaned, the second tank body 3 is first moved upward by the air cylinder 4, so that there is a certain gap between the second tank body 3 and the first tank body 2. Then, the second telescopic member 12 and the first telescopic member 11 are shortened, the second telescopic member 12 is separated from the first heating base 15, and the first telescopic member 11 is separated from the second heating base 16. At this time, the first scraping member 24 supports the first heating base 15, and the second scraping member 27 supports the second heating base 16.

[0057] The servo motor 10 is started, so that the chain 8 moves clockwise, and the chain 8 drives the first telescopic member 11 and the second telescopic member 12 to move clockwise. When the second telescopic member 12 is at the corresponding position of the second heating base 16, the chain 8 is stopped, as shown in Figure 9 After that, the second telescopic member 12 is elongated and inserted into the limiting slot 18 on the second heating base 16.

[0058] The third electric telescopic rod 28 on the first scraping piece 24 is started to move the magnet 29 on the first scraping piece 24 downward, the magnet 29 drives the rectangular block 20 on the lower side of the first heating base 15 to move downward, so that the rectangular block 20 on the lower side of the first heating base 15 is clamped between the first sliding groove and the second sliding groove 13, so that the first heating base 15 and the first scraping piece 24 are connected together to prevent the first heating base 15 from being deflected during upward movement.

[0059] Then, the first electric telescopic rod 22 is extended, the first electric telescopic rod 22 drives the first heating base 15 to move upward through the first scraping piece 24, the first heating base 15 moves upward along the inner wall of the first tank body 2 to scrape the residues on the inner wall of the first tank body 2, and the scraped residues enter the accommodating cavity on the upper side of the first heating base 15. Until the first heating base 15 moves to the upper side of the first tank body 2, the first electric telescopic rod 22 is stopped.

[0060] During the upward movement of the first heating base 15 along the inner wall of the first tank body 2, the second electric telescopic rod 25 is shortened, the second scraping piece 27 moves downward to be separated from the second heating base 16, and the upper end of the second scraping piece 27 is lower than the lower end of the second heating base 16.

[0061] The servo motor 10 is started to drive the chain 8 to move clockwise, so that the first telescopic piece 11 and the second telescopic piece 12 move clockwise, and the second telescopic piece 12 drives the second heating base 16 to move along the chain 8. When the first telescopic piece 11 is opposite to the limiting groove 18 on the first heating base 15, the servo motor 10 is turned off.

[0062] Then, the first telescopic piece 11 is extended and inserted into the limiting groove 18 on the first heating base 15, the first heating base 15 is connected with the chain 8 through the first telescopic piece 11, and at this time, as shown in Figure 10 .

[0063] Then, the rectangular block 20 on the first heating base 15 is separated from the adsorption of the magnet 29. Specifically, the third electric telescopic rod 28 on the first scraping piece 24 is extended, the third electric telescopic rod 28 drives the corresponding rectangular block 20 to move upward through the magnet 29, so that the magnet 29 and the rectangular block 20 return to the initial position. Then, the first electric telescopic rod 22 is shortened, the first electric telescopic rod 22 drives the first scraping piece 24 and the magnet 29 to move downward, the magnet 29 drives the corresponding rectangular block 20 to move downward, and when the second stop block abuts against the first stop block, the rectangular block 20 cannot continue to move downward. With the continuous downward movement of the first scraping piece 24, the magnet 29 and the rectangular block 20 are separated, and the rectangular block 20 returns to the initial position under the action of the tension spring 21. Then, the first electric telescopic rod 22 is turned off.

[0064] Afterwards, the servo motor 10 is started, and the chain 8 moves clockwise. The first telescopic member 11 and the second telescopic member 12 move clockwise with the chain 8. The first telescopic member 11 drives the first heating base 15 to move, and the second telescopic member 12 drives the second heating base 16 to move, until the second heating base 16 moves to the top of the first tank body 2, and the servo motor 10 is turned off.

[0065] Then, the first electric telescopic rod 22 is extended, and the first electric telescopic rod 22 drives the first scraping member 24 to move upwards. When the first scraping member 24 contacts the second heating base 16, the first telescopic member 11 is turned off. At this time, as shown in FIG. 6, the first scraping member 24 is in contact with the second heating base 16. Figure 11 Afterwards, the third electric telescopic rod 28 is retracted, and the third electric telescopic rod 28 drives the magnet 29 to move downwards. The magnet 29 drives the rectangular block 20 on the lower side of the second heating base 16 to move downwards, so that the lower part of the rectangular block 20 extends into the second sliding groove 13. The third electric telescopic rod 28 is turned off.

[0066] Then, the second telescopic member 12 is retracted to be separated from the second heating base 16. Afterwards, the first electric telescopic rod 22 is retracted, and the second heating base 16 moves downwards along the inner wall of the first tank body 2. The second heating base 16 performs scraping and cleaning on the inner wall of the first tank body 2 again. When the second heating base 16 moves to the lower end of the first tank body 2, the first electric telescopic rod 22 is turned off. At this time, as shown in FIG. 7, the second heating base 16 is in contact with the inner wall of the first tank body 2. Figure 12 The residues scraped by the second heating base 16 fall into the shell 1, and residues are adhered to the accommodating cavity on the lower side of the second heating base 16.

[0067] The third electric telescopic rod 28 is started, and the magnet 29 moves upwards, so that the rectangular block 20 and the magnet 29 on the second heating base 16 are reset.

[0068] Afterwards, the first scraping member 24 is driven to rotate by the first motor 23, and the first scraping member 24 performs scraping and cleaning on the second heating base 16.

[0069] Afterwards, the servo motor 10 is started, and the chain 8 moves anticlockwise. The chain 8 drives the first heating base 15 to move through the first telescopic member 11. Until the first heating base 15 moves to the top of the second scraping member 27, the servo motor 10 is turned off. At this time, the second telescopic member 12 is opposite to the limiting slot 18 on the second heating base 16. The second telescopic member 12 is extended and inserted into the limiting slot 18 on the second heating base 16, so that the second heating base 16 is connected with the chain 8 through the second telescopic member 12, and the second heating base 16 is more stable. Meanwhile, the first electrified sheet 14 on the second telescopic member 12 is in contact with the second electrified sheet 19 on the second heating base 16.

[0070] The cylinder 4 is started, and the second tank body 3 moves downwards to be connected with the first tank body 2.

[0071] Afterwards, the DMF waste liquid is injected into the first tank 2 through the liquid inlet pipe 6, and the power supply is started, and the second heating base 16 heats and distills the DMF waste liquid.

[0072] When the chain 8 drives the first heating base 15 to move counterclockwise through the first telescopic member 11, as shown in the direction, Figure 12 when the first heating base 15 passes the upper left corner of the chain 8, it is flipped counterclockwise by 90 degrees, so that the side of the first heating base 15 containing the residues faces the left. Afterwards, the first heating base 15 moves downward with the chain 8, and when the first heating base 15 passes the lower left corner of the chain 8, it is flipped counterclockwise by 90 degrees again, so that the side of the first heating base 15 containing the residues faces downward, and the residues in the first heating base 15 flow to the bottom of the shell 1.

[0073] When the first heating base 15 is above the second scraping member 27, the second electric telescopic rod 25 is extended, the second electric telescopic rod 25 pushes the second scraping member 27 to move upward, and the second scraping member 27 is in contact with the first heating base 15. Afterwards, the second motor 26 is started, and the second motor 26 drives the second scraping member 27 to rotate, and the first heating base 15 is scraped and cleaned.

[0074] Embodiment 2: This embodiment is a further improvement based on embodiment 1.

[0075] A plurality of cleaning pipes 30 are installed on the telescopic shafts of the first electric telescopic rod 22 and the second electric telescopic rod 25.

[0076] An annular cleaning pipe 31 is arranged on the telescopic shaft of the first electric telescopic rod 22. During the process in which the first electric telescopic rod 22 pushes the heating base to move upward through the first scraping member 24, the heating base cleans the inner wall of the first tank 2. At the same time, the annular cleaning pipe 31 sprays liquid onto the inner wall of the first tank 2 to clean the inner wall of the first tank 2 and promote the detachment of the adhering objects on the inner wall of the first tank 2.

[0077] Liquid is sprayed through the cleaning pipes 30 to the second heating base 16 or the first heating base 15 to clean the second heating base 16 or the first heating base 15 and promote the detachment of the adhering objects.

[0078] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A distillation and purification apparatus for treating DMF waste liquid, characterized in that: It includes a shell (1), a first tank (2) and a heating base; the upper part of the shell (1) is provided with an exhaust pipe (5) and the bottom of the shell (1) is provided with a drain pipe (7). The first tank (2) is fixedly installed inside the shell (1), and a second tank (3) that cooperates with the first tank (2) is provided inside the shell (1) and moves up and down. The heating base is fitted with the first tank (2) and is movably disposed within the housing (1); a drive assembly for driving the heating base to move along a rectangular trajectory is installed inside the housing (1); the drive assembly is provided with a telescopic component that is inserted and fitted with the heating base; and annular protrusions are provided on both the upper and lower sides of the heating base. Two cleaning components are installed inside the housing (1) and can move up and down; one of the cleaning components is located directly below the first tank (2); The cleaning assembly includes an electric telescopic rod and a scraper; the electric telescopic rod is installed at the bottom of the housing (1); the telescopic end of the electric telescopic rod is vertically upward and rotatably connected to the scraper; The electric telescopic rod below the first tank (2) is equipped with an annular cleaning pipe (31) for cleaning the inner wall of the first tank (2); the electric telescopic rod is equipped with a cleaning pipe (30) for cleaning the heating base. The heating base has a first sliding groove on both the upper and lower sides, and a rectangular block (20) is elastically slidably arranged in the first sliding groove; a second sliding groove (13) is provided on the scraper below the first tank (2), and a magnet (29) is moved up and down in the second sliding groove (13). The magnet (29) and the rectangular block (20) are attracted to each other, and a third electric telescopic rod (28) is installed on the scraper to drive the magnet (29) to move up and down. There are two drive components, which are symmetrically arranged on both sides of the first tank (2); each drive component includes a chain (8) and four sprockets (9), the sprockets (9) are rotatably mounted on the inner wall of the shell (1), the four sprockets (9) are respectively located at the four corners of the rectangular track, and the chain (8) is wound around the four sprockets (9); the telescopic component is mounted on the chain (8); The telescopic component includes a sliding sleeve and a sliding rod; one end of the sliding sleeve is fixedly connected to the chain (8), and the sliding rod is limited and slidably disposed inside the sliding sleeve; an electrically controlled push rod for driving the sliding rod to slide is disposed inside the sliding sleeve; The heating base has a limiting groove (18) that cooperates with the telescopic component. A second energized piece (19) is provided in the limiting groove (18). An electric heating piece (17) is provided in the heating base. The electric heating piece (17) is in contact with the second energized piece (19).

2. The distillation and purification apparatus for DMF waste liquid treatment according to claim 1, characterized in that: The scraping component includes a scraper, which includes a first plate segment and a second plate segment. The first plate segment and the second plate segment are fixedly connected. The first plate segment mates with the end face of the heating base, and the second plate segment mates with the inner side of the protrusion.

3. The distillation and purification apparatus for DMF waste liquid treatment according to claim 1, characterized in that: There are two heating bases.

4. The distillation and purification apparatus for DMF waste liquid treatment according to claim 1, characterized in that: Two telescopic components are installed at intervals on the chain (8), one of which is equipped with a first energized piece (14) that cooperates with the second energized piece (19).

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