Efficient separation device for coal-based high-purity alkane oxygen-containing compound and use method of efficient separation device

Abstract

According to the efficient separation device for the coal-based high-purity alkane oxygen-containing compound and the use method of the efficient separation device, one end of a fixed pipe A (11) is connected with an infusion pump A (17), the other end of the fixed pipe A (11) extends into the upper part in a kettle body (1) along a through hole A formed in a kettle cover (2), one end of a fixed pipe B (22) is connected with an infusion pump B (21), and the other end of the fixed pipe B (22) extends into the middle part in the kettle body (1) along a through hole B formed in the kettle cover (2); according to the invention, coal-based high-purity alkane is in full contact with cleaning water in the kettle body, the high-power infusion pump A is used for extracting an upper-layer oil phase, and the low-power infusion pump B is used for extracting an upper-layer oil phase positioned at a lower-layer water phase interface; and after the upper-layer oil phase is extracted in one area, the upper-layer oil phase in other areas can timely supplement the liquid level height, so that the defect that the extraction is not thorough or the lower-layer water is extracted out due to too high extraction speed is avoided, and the economic cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to a high-efficiency separation device for coal-based high-purity alkane oxygen-containing compounds and a method of using the same, and belongs to the technical field of coal-based high-purity alkane processing. BACKGROUND

[0002] Coal-based high-purity alkane is a high-purity saturated hydrocarbon produced by coal indirect liquefaction (Fischer-Tropsch synthesis), and almost does not contain impurities such as sulfur, nitrogen and aromatic hydrocarbons. However, about 5%-15% of oxygen-containing compounds (alcohols, aldehydes, ketones, acids, esters, etc.) are produced in the Fischer-Tropsch synthesis process, which will affect the quality and application performance of high-purity alkane, and therefore must be separated and purified; water washing can effectively remove most of the polar oxygen-containing compounds (such as alcohols, carboxylic acids, etc.) in the mixture, reduce the difficulty of subsequent separation, and water washing as pretreatment can reduce the number of theoretical trays (from 100+ to 50-80) and reflux ratio (from 30:1 to 10:1) of the subsequent rectification tower, significantly reducing energy consumption; coal-based high-purity alkane (non-polar) is almost immiscible with water, with a density <1 g / cm³, and after water washing, an upper oil phase is formed, with a purity of 97-99%, and oxygen-containing compounds (polar) are partially dissolved in water to form a lower aqueous phase containing alcohols, aldehydes, ketones, etc., which can be further recovered and utilized. The traditional method for separating the cleaning water containing alcohols, aldehydes, ketones, etc. and coal-based high-purity alkane is generally a rectification method and a layering method. When using the layering method to separate the cleaning water containing alcohols, aldehydes, ketones, etc. and coal-based high-purity alkane, since the purity of the coal-based high-purity alkane added each time is different, the coal-based high-purity alkane after layering is different in height, and thus the separation precision is not high. SUMMARY

[0003] The present application provides a high-efficiency separation device for coal-based high-purity alkane oxygen-containing compounds and a method of using the same to solve the above technical problems.

[0004] The present application solves the above technical problems by the following technical solutions: This invention provides a high-efficiency separation device for high-purity coal-based alkane oxygen-containing compounds, comprising a vessel body, which is an open-top tank covered with a lid, and an insulated outer shell covering the vessel body. A pump A and a pump B are spaced apart on the top of the lid, with the power of pump A being greater than that of pump B. One end of a fixed pipe A is connected to pump A, and the other end of the fixed pipe A extends into the upper part of the vessel body through a perforation A in the lid. A movable pipe A is slidably sleeved at the other end of the fixed pipe A. An electric telescopic rod A is located at the inner top of the lid, with the movable end of the electric telescopic rod A fixedly connected to the movable pipe A. One end of the fixed pipe B is connected to pump B, and the other end of the fixed pipe B extends along the lid... The perforation B extends into the middle of the vessel body. A movable tube B is slidably sleeved at the other end of the fixed tube B. An electric telescopic rod B is provided on the inner top of the vessel lid. The movable end of the electric telescopic rod B is fixedly connected to the fixed tube B. A drive motor is provided at the center of the top of the vessel lid. The stirring shaft of the drive motor extends into the lower part of the vessel body through the perforation C provided in the vessel lid. A stirring rod is provided below the stirring shaft. Glass observation windows are provided at corresponding positions on the insulation shell and the side wall of the vessel body. An electric telescopic rod C is provided on the insulation shell at the bottom outside the glass observation window. An infrared spectrometer is provided at the upper end of the movable rod at the top of the electric telescopic rod C. The electric telescopic rod C can drive the infrared spectrometer to move up and down.

[0005] The aforementioned high-efficiency separation device for high-purity coal-based alkane oxygen-containing compounds has a first sealing ring at the lower end of both fixed pipe A and fixed pipe B, and a second sealing ring at the upper end of both movable pipe A and movable pipe B. This ensures that when movable pipe A and movable pipe B slide up and down, the cavities of movable pipe A and fixed pipe A remain sealed to the outside, and the cavities of movable pipe B and fixed pipe B remain sealed to the outside.

[0006] The efficient separation device for high-purity coal-based alkane oxygen-containing compounds has connecting plates between the movable end of the electric telescopic rod A and the movable pipe A, and between the movable end of the electric telescopic rod B and the fixed pipe B.

[0007] The aforementioned high-efficiency separation device for coal-based high-purity alkane oxygen-containing compounds has a filling pipe that runs through the inside of the vessel body on the vessel lid. The vessel lid is also equipped with a pressure regulating pump and a pressure gauge. The pressure regulating pump is connected to the top of the vessel lid through a pipe. An electric heating tube is coiled in the lower part of the gap between the heat insulation shell and the vessel body.

[0008] The aforementioned high-efficiency separation device for high-purity alkane oxygen-containing compounds based on coal includes an electric telescopic rod A, an electric telescopic rod B, an electric telescopic rod C, a drive motor, a liquid pump A, a liquid pump B, a pressure regulating pump, a pressure gauge, an electric heating tube, and an infrared spectrometer, all connected to a power supply. The electric telescopic rod A, electric telescopic rod B, electric telescopic rod C, liquid pump A, liquid pump B, and the infrared spectrometer are all connected to a controller via data cables. The controller is a microcontroller.

[0009] The aforementioned high-efficiency separation device for high-purity coal-based alkane oxygen-containing compounds has a bottom of the vessel body with a downwardly convex hemispherical structure, and a discharge pipe is provided at the center of the bottom of the vessel body.

[0010] The aforementioned high-efficiency separation device for high-purity coal-based alkane oxygen-containing compounds has support legs at the bottom of the vessel.

[0011] The aforementioned high-efficiency separation device for coal-based high-purity alkane oxygen-containing compounds has a housing covering the infrared spectrometer, and the fixed end of the electric telescopic rod C is fixedly connected to the housing.

[0012] The aforementioned high-efficiency separation device for high-purity coal-based alkane oxygen-containing compounds has a bearing sleeved at the lower end of the stirring shaft, and a support rod is provided between the outer wall of the bearing and the inner wall of the vessel.

[0013] The efficient separation device for high-purity coal-based alkane oxygen-containing compounds was implemented, and a method for using the device was derived, comprising the following steps: Step 1, Connection Preparation: Connect the filling pipe to the coal-based high-purity alkane storage tank containing oxygen-containing compounds and the cleaning water storage tank respectively; connect the liquid pump A and the liquid pump B to the distillation unit; and connect the discharge pipe to the sewage treatment tank. Step 2: Add cleaning water and stir: Add the oxygen-containing coal-based high-purity alkanes and the required cleaning water into the reactor body through the filling pipe. Turn on the electric heating tube to control the reactor body temperature at the required temperature. Turn on the drive motor, which drives the stirring rod to rotate, thereby ensuring that the mixture of oxygen-containing coal-based high-purity alkanes and cleaning water in the reactor body comes into full contact. Turn on the pressure regulating pump to deliver inert gas. The pressure gauge displays the gas pressure in the reactor body in real time to maintain the pressure stability in the reactor body. Step 3, let it stand and separate: Let it stand for 30 minutes. The coal-based high-purity alkanes with trace amounts of oxygen-containing compounds form the upper oil phase, and the washing water with alcohols, acids and ketones forms the lower water phase. Step 4: Retrieving the Finished Product: The controller is activated, and the infrared spectrometer is started to irradiate the inside of the vessel through the glass observation window to determine the height of the stratification point. The controller then activates the electric telescopic rod A, adjusting the height of the movable tube A until its lower end is slightly away from the stratification point before closing the electric telescopic rod A. The controller then activates the liquid extraction pump A, which extracts the upper oil phase at high speed, improving extraction speed and purity. Once the upper oil phase above the lower end of the movable tube A has been completely extracted, the controller closes the liquid extraction pump A and activates the electric telescopic rod B, which moves the movable tube B to... After the lower end is fitted with a gap at the interface between the upper oil phase and the lower water phase, the electric telescopic rod B is closed. The controller then starts the pump B. Pump B slowly extracts a small amount of upper oil phase floating on top of the lower water phase. This ensures that after the upper oil phase is extracted from one area, the upper oil phase in other areas can replenish the liquid level in time. This avoids the drawbacks of incomplete extraction or the extraction of the lower water phase due to excessively fast extraction speed. After pump B has completely extracted the upper oil phase floating on top of the lower water phase, the upper oil phase enters the distillation column for distillation. The discharge pipe is then opened, and the remaining lower water phase in the vessel flows into the wastewater treatment tank for further recycling.

[0014] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0015] The positive and progressive effects of this invention are as follows: The aforementioned efficient separation device and method for high-purity coal-based alkanes containing oxygenated compounds utilize the full contact between high-purity coal-based alkanes and washing water in the reactor. The high-purity coal-based alkanes containing trace amounts of oxygenated compounds form the upper oil phase, while the washing water containing alcohols, acids, and ketones forms the lower water phase. A high-power pump A17 extracts the upper oil phase, and a low-power pump B21 extracts the upper oil phase located at the interface with the lower water phase. This ensures that after the upper oil phase is extracted from one area, the upper oil phase in other areas can replenish the liquid level in a timely manner, avoiding the drawbacks of incomplete extraction or the extraction of the lower water phase due to excessively fast extraction speed, and effectively reducing economic costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a partial cross-sectional view of the vessel body of the present invention; Figure 3 This is a half-sectional view of the present invention; Figure 4 This is a three-dimensional half-sectional view of the present invention; Figure 5 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0017] Explanation of reference numerals in the attached figures 1. Vessel body; 2. Vessel lid; 3. Drive motor; 4. Stirring shaft; 5. Stirring rod; 6. Insulation shell; 7. Electric heating element; 8. Bearing; 9. Support leg; 10. Discharge pipe; 11. Fixed pipe A; 12. First sealing ring; 13. Movable pipe A; 14. Second sealing ring; 15. Connecting plate; 16. Electric telescopic rod A; 17. Liquid pump A; 18. Pressure regulating pump; 19. Pressure gauge; 20. Filling pipe; 21. Liquid pump B; 22. Fixed pipe B; 23. Electric telescopic rod B; 24. Movable pipe B; 25. Shell; 26. Electric telescopic rod C; 27. Glass observation window; 28. Infrared spectrometer; 29. ​​Support rod. Detailed Implementation

[0018] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0019] like Figures 1-5 As shown, the high-efficiency separation device for high-purity coal-based alkane oxygen-containing compounds includes a vessel body 1, which is an open-top tank. A vessel cover 2 covers the top of the vessel body 1, and an insulating shell 6 covers the outside of the vessel body 1. A pump A17 and a pump B21 are spaced apart on the top of the vessel cover 2. The power of pump A17 is greater than that of pump B21. One end of a fixed pipe A11 is connected to pump A17, and the other end of the fixed pipe A11 extends into the upper part of the vessel body 1 through a perforation A in the vessel cover 2. A movable pipe A13 is slidably sleeved at the other end of the fixed pipe A11. An electric telescopic rod A16 is provided at the inner top of the vessel cover 2, and the movable end of the electric telescopic rod A16 is fixedly connected to the movable pipe A13. One end of the fixed pipe B22 is connected to pump B21, and the other end of the fixed pipe B22 extends into the upper part of the vessel body 1 through a perforation A in the vessel cover 2. A perforation B extends into the middle of the vessel body 1. A movable tube B24 is slidably sleeved at the other end of the fixed tube B22. An electric telescopic rod B23 is provided at the top inner part of the vessel cover 2. The movable end of the electric telescopic rod B23 is fixedly connected to the fixed tube B22. A drive motor 3 is provided at the center of the top of the vessel cover 2. The stirring shaft 4 of the drive motor 3 extends into the lower part of the vessel body 1 through the perforation C provided in the vessel cover 2. A stirring rod 5 is provided at the lower part of the stirring shaft 4. Glass observation windows 27 are provided at corresponding positions on the heat insulation shell 6 and the side wall of the vessel body 1. An electric telescopic rod C26 is provided at the bottom outer part of the glass observation window 27 on the heat insulation shell 6. An infrared spectrometer 28 is provided at the upper end of the movable rod at the top of the electric telescopic rod C26. The electric telescopic rod C26 can drive the infrared spectrometer 28 to move up and down. A first sealing ring 12 is provided at the lower end of both the fixed tube A11 and the fixed tube B22, and a second sealing ring 14 is provided at the upper end of both the movable tube A13 and the movable tube B24, so that when the movable tube A13 and the movable tube B24 slide up and down, the cavity between the movable tube A13 and the fixed tube A11 is kept sealed from the outside, and the cavity between the movable tube B24 and the fixed tube B22 is kept sealed from the outside. A connecting plate 15 is provided between the movable end of the electric telescopic rod A16 and the movable tube A13, and between the movable end of the electric telescopic rod B23 and the fixed tube B22. A filling pipe 20 that penetrates the interior of the vessel body 1 is provided on the vessel lid 2. A pressure regulating pump 18 and a pressure gauge 19 are also provided on the vessel lid 2. The pressure regulating pump 18 is connected to the top of the vessel lid 2 through a pipe. An electric heating tube 7 is coiled in the lower part of the gap between the heat insulation shell 6 and the vessel body 1. Electric telescopic poles A16, B23, and C26, drive motor 3, liquid pump A17, liquid pump B21, pressure regulating pump 18, pressure gauge 19, electric heating tube 7, and infrared spectrometer 28 are connected to the power supply. Electric telescopic poles A16, B23, and C26, liquid pump A17, liquid pump B21, and infrared spectrometer 28 are all connected to the controller via data cables. The controller is a single-chip microcomputer. The bottom of the vessel body 1 is designed as a downwardly convex hemispherical structure, and a discharge pipe 10 is provided at the center of the bottom of the vessel body 1; Support legs 9 are provided at the bottom of the vessel body 1; The infrared spectrometer 28 is covered by a housing 25, and the fixed end of the electric telescopic rod C26 is fixedly connected to the housing 25. A bearing 8 is sleeved at the lower end of the stirring shaft 4, and a support rod 29 is provided between the outer wall of the bearing 8 and the inner wall of the vessel body 1. The efficient separation device for high-purity coal-based alkane oxygen-containing compounds was implemented, and a method for using the device was derived, comprising the following steps: Step 1, Connection Preparation: Connect the filling pipe 20 to the coal-based high-purity alkane storage tank containing oxygen-containing compounds and the washing water storage tank respectively; connect the liquid pump A17 and the liquid pump B21 to the distillation device; and connect the discharge pipe 10 to the sewage treatment tank. Step 2: Add cleaning water and stir: Add the oxygen-containing coal-based high-purity alkanes and the required cleaning water into the vessel 1 through the filling pipe 20. Turn on the electric heating tube 7 to control the temperature of the vessel 1 at the required temperature. Turn on the drive motor 3, which drives the stirring rod 5 to rotate, thereby driving the mixture of oxygen-containing coal-based high-purity alkanes and cleaning water in the vessel 1 to come into full contact. Turn on the pressure regulating pump 18 to deliver inert gas. The pressure gauge 19 displays the gas pressure in the vessel 1 in real time to keep the pressure in the vessel 1 stable. Step 3, let it stand and separate: Let it stand for 30 minutes. The coal-based high-purity alkanes with trace amounts of oxygen-containing compounds form the upper oil phase, and the washing water with alcohols, acids and ketones forms the lower water phase. Step 4: Product Extraction: The controller is activated, and the infrared spectrometer 28 is started to irradiate the inside of the vessel 1 through the glass observation window 27 to determine the height of the stratification point. The controller then activates the electric telescopic rod A16, adjusting the height of the movable tube A13 until its lower end is slightly away from the stratification point before closing the electric telescopic rod A16. The controller then activates the liquid extraction pump A17, which extracts the upper oil phase at high speed, improving extraction speed and purity. Once the upper oil phase above the lower end of the movable tube A13 has been completely extracted, the controller closes the liquid extraction pump A17 and activates the electric telescopic rod B23, which drives the movable tube... After B24 moves to a clearance fit between its lower end and the interface between the upper oil phase and the lower water phase, the electric telescopic rod B23 is closed. The controller then activates the pump B21. Pump B21 slowly extracts a small amount of upper oil phase floating on top of the lower water phase, ensuring that the upper oil phase in other areas can replenish the liquid level after one area is extracted. This avoids the drawbacks of incomplete extraction or the extraction of the lower water phase due to excessively fast extraction speed. After pump B21 has completely extracted the upper oil phase floating on top of the lower water phase, the upper oil phase enters the distillation column for distillation. The discharge pipe 10 is opened, and the remaining lower water phase in the vessel 1 flows into the wastewater treatment tank for further recycling.

[0020] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. A high-efficiency separation device for high-purity coal-based alkane oxygen-containing compounds, characterized in that: Includes a vessel body (1), which is an open-top tank. A lid (2) covers the top of the vessel body (1), and an insulating shell (6) covers the outside of the vessel body (1). A liquid pump A (17) and a liquid pump B (21) are spaced apart on the top of the lid (2). The power of the liquid pump A (17) is greater than that of the liquid pump B (21). One end of a fixed pipe A (11) is connected to the liquid pump A (17), and the other end of the fixed pipe A (11) is connected to the lid (21). 2) A perforation A extends into the upper part of the vessel body (1). A movable tube A (13) is slidably sleeved at the other end of the fixed tube A (11). An electric telescopic rod A (16) is provided at the inner top of the vessel cover (2). The movable end of the electric telescopic rod A (16) is fixedly connected to the movable tube A (13). One end of the fixed tube B (22) is connected to the liquid pump B (21). The other end of the fixed tube B (22) extends into the vessel body through the perforation B provided in the vessel cover (2). 1) In the middle of the inner part, a movable tube B (24) is slidably sleeved at the other end of the fixed tube B (22). An electric telescopic rod B (23) is provided at the inner top of the lid (2). The movable end of the electric telescopic rod B (23) is fixedly connected to the fixed tube B (22). A drive motor (3) is provided at the center of the top of the lid (2). The stirring shaft (4) of the drive motor (3) extends into the lower part of the body (1) through the perforation C provided in the lid (2). A stirring rod (5) is provided at the lower part of the stirring shaft (4). A glass observation window (27) is provided at the corresponding position of the heat insulation shell (6) and the side wall of the body (1). An electric telescopic rod C (26) is provided at the bottom of the glass observation window (27) on the heat insulation shell (6). An infrared spectrometer (28) is provided at the upper end of the movable rod at the top of the electric telescopic rod C (26). The electric telescopic rod C (26) can drive the infrared spectrometer (28) to move up and down.

2. The high-efficiency separation device for coal-based high-purity alkane oxygen-containing compounds as described in claim 1, characterized in that: A first sealing ring (12) is provided at the lower end of both the fixed tube A (11) and the fixed tube B (22), and a second sealing ring (14) is provided at the upper end of both the movable tube A (13) and the movable tube B (24), so that when the movable tube A (13) and the movable tube B (24) slide up and down, the cavity between the movable tube A (13) and the fixed tube A (11) is kept sealed from the outside, and the cavity between the movable tube B (24) and the fixed tube B (22) is kept sealed from the outside.

3. The high-efficiency separation device for coal-based high-purity alkane oxygen-containing compounds as described in claim 1, characterized in that: A connecting plate (15) is provided between the end of the movable end of the electric telescopic rod A (16) and the movable tube A (13), and between the end of the movable end of the electric telescopic rod B (23) and the fixed tube B (22).

4. The high-efficiency separation device for coal-based high-purity alkane oxygen-containing compounds as described in claim 1, characterized in that: A filling pipe (20) that penetrates the inside of the vessel body (1) is provided on the lid (2). A pressure regulating pump (18) and a pressure gauge (19) are also provided on the lid (2). The pressure regulating pump (18) is connected to the top of the lid (2) through a pipe. An electric heating tube (7) is coiled in the lower part of the gap between the heat insulation shell (6) and the vessel body (1).

5. The high-efficiency separation device for coal-based high-purity alkane oxygen-containing compounds as described in claim 4, characterized in that: Electric telescopic rod A (16), electric telescopic rod B (23), electric telescopic rod C (26), drive motor (3), liquid pump A (17), liquid pump B (21), pressure regulating pump (18), pressure gauge (19), electric heating tube (7) and infrared spectrometer (28) are connected to the power supply for switching on and off respectively. Electric telescopic rod A (16), electric telescopic rod B (23), electric telescopic rod C (26), liquid pump A (17), liquid pump B (21) and infrared spectrometer (28) are all connected to the controller through data cable. The controller is a single-chip microcomputer.

6. The high-efficiency separation device for coal-based high-purity alkane oxygen-containing compounds as described in claim 1, characterized in that: The bottom of the vessel body (1) is set as a downward convex hemispherical structure, and a discharge pipe (10) is provided at the center of the bottom of the vessel body (1).

7. The high-efficiency separation device for coal-based high-purity alkane oxygen-containing compounds as described in claim 1, characterized in that: Support legs (9) are provided at the bottom of the vessel body (1).

8. The high-efficiency separation device for coal-based high-purity alkane oxygen-containing compounds as described in claim 1, characterized in that: The infrared spectrometer (28) is covered by a housing (25), and the fixed end of the electric telescopic rod C (26) is fixedly connected to the housing (25).

9. The high-efficiency separation device for coal-based high-purity alkane oxygen-containing compounds as described in claim 1, characterized in that: A bearing (8) is fitted onto the lower end of the stirring shaft (4), and a support rod (29) is provided between the outer wall of the bearing (8) and the inner wall of the vessel body (1).

10. A method for using the high-efficiency separation device for high-purity coal-based alkane oxygen-containing compounds as described in any one of claims 1-9, characterized in that: The method of use includes the following steps: Step 1, Connection Preparation: Connect the filling pipe (20) to the coal-based high-purity alkane storage tank containing oxygen-containing compounds and the cleaning water storage tank respectively; connect the liquid pump A (17) and the liquid pump B (21) to the distillation device; and connect the discharge pipe (10) to the sewage treatment tank. Step 2, Add cleaning water and stir: Add the oxygen-containing coal-based high-purity alkanes and the required cleaning water into the vessel body (1) through the filling pipe (20), turn on the electric heating tube (7) to control the temperature of the vessel body (1) at the required temperature, turn on the drive motor (3), the drive motor (3) drives the stirring rod (5) to rotate, thereby driving the mixture of oxygen-containing coal-based high-purity alkanes and cleaning water in the vessel body (1) to fully contact, turn on the pressure regulating pump (18) to transport inert gas, and display the gas pressure in the vessel body (1) in real time through the pressure gauge (19) to keep the pressure in the vessel body (1) stable; Step 3, let it stand and separate: Let it stand for 30 minutes. The coal-based high-purity alkanes with trace amounts of oxygen-containing compounds form the upper oil phase, and the washing water with alcohols, acids and ketones forms the lower water phase. Step 4, Extracting the Finished Product: Turn on the controller, which will start the infrared spectrometer (28) to irradiate the inside of the vessel (1) through the glass observation window (27) to determine the height of the stratification point. The controller will then start the electric telescopic rod A (16), and adjust the height of the movable tube A (13) by the electric telescopic rod A (16) until its lower end is slightly away from the stratification point before closing the electric telescopic rod A (16). The controller will then start the liquid pump A (17), which will extract the upper oil phase at high speed, improving the extraction speed and purity. After the upper oil phase above the lower end of the movable tube A (13) has been completely extracted, the controller will then close the liquid pump A (17) and start the electric telescopic rod B (23). The moving tube B (24) is moved so that its lower end fits the interface between the upper oil phase and the lower water phase. Then the electric telescopic rod B (23) is closed. The controller controls the start of the pumping pump B (21). The pumping pump B (21) slowly extracts a small amount of upper oil phase floating on the top of the lower water phase. This allows the upper oil phase in other areas to replenish the liquid level in time after the upper oil phase in one area is extracted. This avoids the drawbacks of not being able to extract cleanly or sucking out the lower water phase along with the upper oil phase due to the excessively fast extraction speed. After the pumping pump B (21) has completely extracted the upper oil phase floating on the top of the lower water phase, the upper oil phase enters the distillation column for distillation. The discharge pipe (10) is opened, and the remaining lower water phase in the vessel (1) flows into the sewage treatment tank for the next step of recycling.

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