A waste mineral oil regeneration vacuum treatment system

Abstract

The utility model discloses a kind of waste mineral oil regeneration pressure reduction processing systems, comprising: distillation column, driving assembly being arranged on the distillation column, rotating assembly being arranged on the driving assembly, the driving assembly includes;First rotating motor being arranged at the top of the distillation column, first rotating shaft being connected to the first rotating motor;The rotating assembly includes: rotating rod being connected to the first rotating shaft, several stirring rods being arranged on the rotating rod;The stirring rod tip end is provided with scraper, the scraper touches the inner wall of the distillation column, the top of the distillation column is connected with a waste gas pipe, the other end of the waste gas pipe is connected with exhaust fan, and the exhaust fan is connected on a filter box;Active carbon filter layer is arranged in the filter box, and first filter screen is arranged on the active carbon filter layer.The utility model cooperates with stirring rod to carry out mechanical scraping and stirring to waste material, solves the technical difficulty that residue deposits in inner wall and forms coking layer in distillation process.

Description

Technical Field

[0001] This utility model relates to the field of waste oil recycling and regeneration technology, and in particular to a waste mineral oil regeneration decompression treatment system. Background Technology

[0002] Waste mineral oil is a highly polluting waste generated in the industrial sector, containing heavy metals, colloids, and oxidation products. Direct discharge will cause serious environmental damage. The core of its regeneration treatment lies in the efficient separation of base oil, and vacuum distillation technology has become the mainstream process because it can avoid high-temperature cracking.

[0003] Existing technology CN221491479U relates to a vacuum distillation device for waste mineral oil regeneration with waste heat recovery function. It includes a distillation column, with heat exchange tubes arranged inside the column. Multiple mounting brackets are fixedly connected to the inside of the column and above the heat exchange tubes. A mounting plate is fixedly connected to all the brackets. A motor is mounted at the bottom of the mounting plate, and a connecting shaft is bolted to the output shaft. A hollow turntable is fixedly connected to the bottom of the connecting shaft. By installing a motor-driven hollow turntable inside the distillation column and above the heat exchange tubes, the turntable can supply clean water via a water supply pipe. A nozzle is installed at the bottom of the hollow turntable, allowing for the spraying of clean water onto the heat exchange tubes after use, rinsing the tubes and preventing the deposition of distillation residue on the tube surface, thus ensuring the efficiency of waste heat recovery from the heat exchange tubes.

[0004] However, the above-mentioned vacuum distillation device for regeneration has the following problems: 1. It cannot treat the waste gas generated during the distillation process.

[0005] 2. The waste generated inside the distillation column during the distillation process cannot be cleaned. Summary of the Invention

[0006] This invention overcomes the shortcomings of the prior art and provides a waste mineral oil regeneration and decompression treatment system.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a waste mineral oil regeneration and depressurization treatment system, comprising: a distillation tower, a drive assembly disposed on the distillation tower, and a rotating assembly disposed on the drive assembly;

[0008] The drive assembly includes: a first rotary motor disposed at the top of the distillation column, and a first rotating shaft connected to the first rotary motor;

[0009] The rotating assembly includes: a rotating rod connected to the first rotating shaft, and a plurality of stirring rods disposed on the rotating rod;

[0010] The stirring rod is equipped with a scraper at its end, which contacts the inner wall of the distillation tower. The top of the distillation tower is connected to an exhaust pipe, and the other end of the exhaust pipe is connected to an exhaust fan, which is connected to a filter box.

[0011] The filter box is equipped with an activated carbon filter layer, and a first filter screen is installed on the activated carbon filter layer.

[0012] In a preferred embodiment of this utility model, a second filter screen and a third filter screen are sequentially arranged at the bottom of the distillation column, with the second filter screen positioned above the third filter screen, and the filter holes of the second filter screen being larger than those of the third filter screen.

[0013] In a preferred embodiment of the present invention, a second rotating shaft is connected to the bottom of the rotating rod, the second rotating shaft is mounted on a support frame, and the support frame is fixed to the inner wall of the distillation column.

[0014] In a preferred embodiment of this utility model, the distillation column is provided with a plurality of heating tubes.

[0015] In a preferred embodiment of the present invention, a circulation pipe is connected to the bottom of the distillation column, and a first valve is provided on the circulation pipe.

[0016] In a preferred embodiment of this utility model, a water pump is installed on the circulation pipeline.

[0017] In a preferred embodiment of this invention, the other end of the circulation pipe is connected to the top of the distillation column.

[0018] In a preferred embodiment of this utility model, a drain pipe is connected to the bottom end of the distillation column, and a second valve is connected to the drain pipe.

[0019] In a preferred embodiment of this utility model, the top of the distillation column is connected to two water inlet pipes, which extend into the distillation column. Several nozzles are provided on the water inlet pipe sections inside the distillation column.

[0020] In a preferred embodiment of this utility model, an exhaust pipe is connected to the bottom of the filter box.

[0021] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0022] (1) In this utility model, the scraper in the rotating assembly contacts the inner wall of the distillation column, and works with the stirring rod to mechanically scrape and stir the waste. The first rotating motor drives the stirring rod equipped with the scraper to rotate through the first rotating shaft. When the rotating rod rotates stably with the assistance of the support frame and the second rotating shaft, the end scraper continuously scrapes the inner wall of the distillation column. This dynamic contact mechanism directly solves the technical difficulty of residue deposition on the inner wall during the distillation process to form a coking layer. Compared with the rotary spray cleaning scheme designed only for heat exchange tubes in the prior art, this design achieves active mechanical cleaning of the inner wall of the distillation column, avoiding the problem of reduced heat transfer efficiency caused by long-term accumulation of residue. At the same time, it prevents coking caused by waste mineral oil remaining in one state for a long time during the distillation process.

[0023] (2) This utility model features an exhaust pipe installed at the top of the distillation tower, and an exhaust fan transports the exhaust gas to a filter box with a built-in activated carbon filter layer. The activated carbon adsorbs harmful substances, while the first filter screen intercepts particulate matter, directly solving the problem of fugitive emissions of exhaust gas and significantly reducing pollution. Further benefits include meeting environmental emission standards, improving the safety of the working environment, and the modular design of the filter box facilitates future maintenance and replacement.

[0024] (3) This utility model achieves the recycling and purification of distillation residue by setting a circulation pipe at the bottom of the distillation tower and connecting it to the top of the distillation tower, in conjunction with a graded filter screen and a water pump. The prior art only uses a static filter screen to treat the cold medium, and the water pump can guide the oil that has not been fully distilled back to the top of the tower for further treatment. The second filter screen has a larger pore size than the third filter screen, and the graded filter screen intercepts impurities of different particle sizes step by step. The purified water is atomized and sprayed out from the nozzle to form a dynamic cleaning flow. The direct effect is to thoroughly flush the space inside the tower and dissolve residual oil stains; at the same time, the filtered liquid can be reused, which further reduces water consumption and waste liquid treatment costs compared to the single filtration and discharge scheme in the prior art. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0026] Figure 1 This is a perspective structural diagram of a preferred embodiment of the present invention;

[0027] Figure 2 This is a cross-sectional view of a distillation column according to a preferred embodiment of the present invention;

[0028] Figure 3 This is a cross-sectional view of the filter box according to a preferred embodiment of the present invention;

[0029] In the diagram: 1. Distillation tower; 2. First rotary motor; 3. First rotary shaft; 4. Rotating rod; 5. Stirring rod; 6. Scraper; 7. Exhaust gas pipe; 8. Exhaust fan; 9. Filter box; 10. Activated carbon filter layer; 11. First filter screen; 12. Second filter screen; 13. Third filter screen; 14. Second rotary shaft; 15. On the support frame; 16. Heating tube; 17. Circulation pipe; 18. First valve; 19. Water pump; 20. Drain pipe; 21. Second valve; 22. Water inlet pipe; 23. Nozzle; 24. Exhaust pipe. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0031] like Figures 1-3 As shown, a waste mineral oil regeneration and depressurization treatment system includes: a distillation tower 1, a drive assembly disposed on the distillation tower 1, and a rotating assembly disposed on the drive assembly.

[0032] In this invention, the driving assembly includes: a first rotary motor 2 disposed at the top of the distillation column 1, and a first rotary shaft 3 connected to the first rotary motor 2; the rotating assembly includes: a rotating rod 4 connected to the first rotary shaft 3, and several stirring rods 5 disposed on the rotating rod 4; a scraper 6 is disposed at the end of the stirring rod 5, the scraper 6 contacting the inner wall of the distillation column 1; a second rotary shaft 14 is connected to the bottom of the rotating rod 4, the second rotary shaft 14 is disposed on a support frame 15, and the support frame is fixed to the inner wall of the distillation column 1. The first rotary shaft 3 begins to rotate under the drive of the first rotary motor 2. Since the rotating rod 4 is connected to the first rotary shaft 3, the rotating rod 4 also rotates accordingly. The several stirring rods 5 disposed on the rotating rod 4 also rotate together with the rotating rod 4, and the scraper 6 disposed at the end of the stirring rod 5 also begins to rotate and contact the inner wall of the distillation column 1. The second rotary shaft 14 is connected to the bottom of the rotating rod 4, the second rotary shaft 14 is disposed on a support frame 15, and the support frame is fixed to the inner wall of the distillation column 1. During rotation, the rotating rod 4 maintains stable rotation with the assistance of the support frame and the second rotating shaft 14, ensuring that the scraper 6 at the end of the stirring rod 5 continuously scrapes the inner wall of the distillation column 1. Simultaneously, the stirring rod 5 agitates the waste material, preventing coking of the waste mineral oil and improving distillation efficiency. Agitation helps avoid localized overheating or uneven cooling, ensuring the stability and consistency of the distillation process. The scraper 6 contacts the inner wall of the distillation column 1 and continuously scrapes the column wall as the stirring rod 5 rotates, effectively removing deposits of waste material from the column wall and preventing long-term accumulation to form a coking layer, thus avoiding affecting the heat transfer efficiency of the distillation column 1 and increasing energy consumption.

[0033] In this invention, a waste gas pipe 7 is connected to the top of the distillation tower 1, and an exhaust fan 8 is connected to the other end of the waste gas pipe 7. The exhaust fan 8 is connected to a filter box 9. An activated carbon filter layer 10 is installed inside the filter box 9, and a first filter screen 11 is installed on the activated carbon filter layer 10. An exhaust pipe 24 is connected to the bottom of the filter box 9. During the vacuum distillation of waste mineral oil, waste gas containing harmful substances is generated. The waste gas is collected through the waste gas pipe 7 connected to the top of the distillation tower 1 and transported to the exhaust fan 8. After the exhaust fan 8 is started, a negative pressure is generated to draw the waste gas out of the waste gas pipe 7 and send the waste gas into the filter box 9. The waste gas first enters the first filter screen 11 in the filter box 9, where large particles of impurities and oil mist are intercepted. Then the waste gas passes through the activated carbon filter layer 10, where the activated carbon adsorbs volatile organic compounds, odors, and other harmful gas components in the waste gas. After being purified by the double filtration of the first filter screen 11 and the activated carbon filter layer 10, the waste gas becomes cleaner and meets environmental emission standards. Finally, the purified gas is discharged into the atmosphere through the exhaust pipe 24 connected to the bottom of the filter box 9.

[0034] In this invention, a second filter screen 12 and a third filter screen 13 are sequentially arranged at the bottom of the distillation column 1. The second filter screen 12 is positioned above the third filter screen 13, and the filter holes of the second filter screen 12 are larger than those of the third filter screen 13. Impurities, colloids, oxidation products, etc., in the waste mineral oil will gradually settle to the bottom of the distillation column 1. When these waste materials and residual liquids flow through the bottom of the distillation column 1, they will pass through the second filter screen 12 and the third filter screen 13 in sequence. The second filter screen 12, located at the top, has relatively large filter holes, which first filters and intercepts larger particulate impurities; then the liquid continues to flow downwards, passing through the third filter screen 13 below, whose filter holes are even smaller, further intercepting finer impurity particles.

[0035] In this invention, a plurality of heating tubes 16 are installed inside the distillation column 1. A circulation pipe 17 is connected to the bottom of the distillation column 1, and a first valve 18 is installed on the circulation pipe 17. A water pump 19 is installed on the circulation pipe 17. The other end of the circulation pipe 17 is connected to the top of the distillation column 1. The heating tubes 16 generate heat when energized, providing the heat required for the distillation of waste mineral oil, so that the base oil in the waste mineral oil can reach the vaporization temperature. After being heated, some of the incompletely distilled oil and dissolved residual oil will flow to the bottom of the column with the liquid, be pumped by the water pump 19 through the circulation pipe 17, and return to the top of the column for re-distillation. The first valve 18 is used to control the opening and closing of the circulation pipe 17 and to regulate the flow rate of the circulating liquid.

[0036] In this invention, a drain pipe 20 is connected to the bottom of the distillation column 1, and a second valve 21 is connected to the drain pipe 20. When the distillation process is completed or when it is necessary to discharge the waste liquid at the bottom of the distillation column 1, the operator can open the second valve 21 on the drain pipe 20 to allow the waste liquid at the bottom of the distillation column 1 to be discharged through the drain pipe 20. During normal distillation, the second valve 21 is usually closed to prevent the leakage of liquid and vapor from the column and to maintain stable pressure and liquid level inside the distillation column 1.

[0037] In this invention, the top of the distillation column 1 is connected to two water inlet pipes 22, which extend into the distillation column 1. Several nozzles 23 are installed on the water inlet pipes 22 inside the distillation column 1. The two water inlet pipes 22 are connected to an external liquid supply source. When liquid enters the distillation column 1 through the water inlet pipes 22, the nozzles 23 evenly distribute the liquid into the internal space of the distillation column 1 in the form of atomization or spraying. The nozzles 23 can spray liquid as needed to clean, cool, or perform other functions inside the distillation column 1.

[0038] In use, waste mineral oil is injected into distillation tower 1, and the heating pipe 16 on the inner wall of distillation tower 1 is activated, transferring heat to the waste mineral oil and raising its temperature. During the heating process, the base oil gradually vaporizes, and the vapor rises to the top of distillation tower 1. The first rotary motor 2 is activated, driving the first rotary shaft 3 to rotate, and the rotary rod 4 rotates accordingly. The scraper 6 at the end of the stirring rod 5 contacts the inner wall of distillation tower 1 and rotates accordingly. The stirring rod 5 stirs the waste material, making it heat more evenly and avoiding local overheating or uneven cooling. At the same time, the scraper 6 continuously scrapes the tower wall, removing deposits of waste material on the tower wall and preventing coking that would affect distillation efficiency. The waste gas generated during distillation is collected by the waste gas pipe 7 and sent to the exhaust fan 8. The exhaust fan 8 is activated, transporting the waste gas to the filter box 9. The waste gas first passes through the first filter screen 11, intercepting large particulate impurities and oil mist; then it passes through the activated carbon filter layer 10, adsorbing volatile organic compounds, odors, and other harmful gas components. The purified exhaust gas meets environmental emission standards and is discharged into the atmosphere through exhaust pipe 24. Impurities, colloids, oxidation products, etc., in the waste mineral oil settle to the bottom of distillation tower 1 and are filtered sequentially through the second filter screen 12 and the third filter screen 13. The liquid after two-stage filtration is drawn back to the top of distillation tower 1 by the water pump 19 on the circulation pipe 17 for redistillation. The first valve 18 on the circulation pipe 17 can regulate the flow rate and speed of the circulating liquid. When the distillation process is completed or when it is necessary to discharge the waste residue at the bottom of distillation tower 1, the second valve 21 on the drain pipe 20 is opened to discharge the waste residue from distillation tower 1. During normal distillation, the second valve 21 is in the closed state.

[0039] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A waste mineral oil regeneration and depressurization treatment system, comprising: A distillation column (1), a drive assembly disposed on the distillation column (1), and a rotating assembly disposed on the drive assembly, characterized in that, The drive assembly includes: a first rotary motor (2) disposed at the top of the distillation column (1), and a first rotating shaft (3) connected to the first rotary motor (2); The rotating assembly includes: a rotating rod (4) connected to the first rotating shaft (3), and a plurality of stirring rods (5) disposed on the rotating rod (4); The stirring rod (5) is provided with a scraper (6) at its end. The scraper (6) contacts the inner wall of the distillation tower (1). The top of the distillation tower (1) is connected to a waste gas pipe (7). The other end of the waste gas pipe (7) is connected to an exhaust fan (8). The exhaust fan (8) is connected to a filter box (9). The filter box (9) is provided with an activated carbon filter layer (10), and a first filter screen (11) is provided on the activated carbon filter layer (10).

2. The waste mineral oil regeneration and depressurization treatment system according to claim 1, characterized in that: The bottom of the distillation column (1) is provided with a second filter screen (12) and a third filter screen (13) in sequence. The second filter screen (12) is located above the third filter screen (13), and the filter holes of the second filter screen (12) are larger than those of the third filter screen (13).

3. The waste mineral oil regeneration and depressurization treatment system according to claim 1, characterized in that: The bottom of the rotating rod (4) is connected to a second rotating shaft (14), which is mounted on a support frame (15) and the support frame is fixed to the inner wall of the distillation column (1).

4. The waste mineral oil regeneration and depressurization treatment system according to claim 1, characterized in that: The distillation column (1) is equipped with several heating tubes (16).

5. The waste mineral oil regeneration and depressurization treatment system according to claim 1, characterized in that: The bottom of the distillation column (1) is connected to a circulation pipe (17), and a first valve (18) is installed on the circulation pipe (17).

6. The waste mineral oil regeneration and depressurization treatment system according to claim 5, characterized in that: A water pump (19) is installed on the circulation pipe (17).

7. The waste mineral oil regeneration and depressurization treatment system according to claim 5, characterized in that: The other end of the circulation pipe (17) is connected to the top of the distillation column (1).

8. The waste mineral oil regeneration and depressurization treatment system according to claim 1, characterized in that: The bottom end of the distillation column (1) is connected to a drain pipe (20), and a second valve (21) is connected to the drain pipe (20).

9. The waste mineral oil regeneration and depressurization treatment system according to claim 1, characterized in that: The top of the distillation tower (1) is connected to two water inlet pipes (22), which extend into the distillation tower (1). Several nozzles (23) are provided in the water inlet pipes (22) inside the distillation tower (1).

10. The waste mineral oil regeneration and depressurization treatment system according to claim 1, characterized in that: The bottom of the filter box (9) is connected to an exhaust pipe (24).

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