Evaporation and condensation separation equipment and use method thereof

Abstract

The invention discloses evaporation and condensation separation equipment which comprises a supporting frame, and a lifting and overturning assembly is arranged on the supporting frame. A raw material liquid outlet pipe and an air inlet pipe are arranged on the raw material barrel; the separation tank is provided with a raw material liquid inlet and a separation fence gas outlet, a spraying assembly is arranged below the raw material liquid inlet, and a liquid-cooled condenser is arranged below the spraying assembly; a condensing coil is arranged in the condensing tank, and an air inlet and a condensed liquid outlet are formed in the condensing tank; and the finished product barrel is provided with a condensation liquid inlet and an extraction opening. By controlling the temperature and the pressure difference, different components in the raw material liquid can be effectively separated. And the temperature in the separation tank is sequentially controlled at different gas-liquid conversion temperatures from low to high, so that only target liquid can be condensed after being vaporized, and efficient separation is realized.

Description

Technical Field

[0001] The invention relates to an evaporation condensation separation device and a use method thereof. Background Art

[0002] In daily industrial production activities, the contamination of liquid media by another liquid medium is very common, covering almost all industries. For example, in the refrigeration industry, refrigerants may be contaminated by refrigeration oil; in the oil manufacturing industry, oil products may be contaminated by water; in the chemical industry, medicines may be contaminated by oil or water; hydraulic oil in the machinery industry may also be contaminated by water, etc.

[0003] These contaminated media have lost their original performance and become waste, and can no longer be effectively used. This transformation directly leads to the need to replace new media, which causes considerable economic losses. In addition, the treatment of these contaminated media requires additional economic investment, which undoubtedly increases the cost pressure of enterprises. What is more serious is that with the continuous generation of a large amount of waste, they have caused a huge burden on the environment. Summary of the invention

[0004] The main purpose of the present invention is to provide an evaporation-condensation separation device and a method of using the same to solve the problems raised in the above background.

[0005] The purpose of the present invention can be achieved by adopting the following technical solutions: An evaporation condensation separation device, comprising A support frame, wherein a lifting and flipping assembly is provided on the support frame; A raw material barrel, wherein the raw material barrel is provided with a raw material liquid outlet pipe and an air inlet pipe; A separation tank, wherein the separation tank is provided with a raw material liquid inlet and a barrier gas outlet, a spray assembly is provided below the raw material liquid inlet, and a liquid-cooled condenser is provided below the spray assembly; A condensation tank, wherein a condensation coil is arranged in the condensation tank, and an air inlet and a condensation liquid outlet are arranged on the condensation tank; A finished product barrel, wherein the finished product barrel is provided with a condensation liquid inlet and an air extraction port; The raw material barrel is fixed on the lifting and flipping assembly, the raw material liquid outlet pipe of the raw material barrel is connected to the raw material liquid inlet of the separation tank through a spray pump, the isolation fence air outlet of the separation tank is connected to the air inlet of the condensation tank, the condensation liquid outlet of the condensation tank is connected to the condensation liquid inlet of the finished product barrel, and the air suction port of the finished product barrel is connected to the air inlet pipe of the raw material barrel through a pressure differential pump.

[0006] Preferably, the lifting and flipping assembly includes a load-bearing column, a transmission screw is provided on the load-bearing column, a lifting motor is provided at the top of the transmission screw, a lifting slider is provided on the transmission screw, a rotating shaft is provided on the lifting slider, a clamp is provided on the rotating shaft, and the raw material barrel is fixed on the clamp.

[0007] Preferably, the spray assembly comprises a liquid distribution pan, and a spray head is arranged below the liquid distribution pan.

[0008] Preferably, a heater is provided at the bottom of the separation tank.

[0009] Preferably, a circulation port is provided at the bottom of the separation tank, a circulation pump is provided outside the circulation port, and the circulation pump is connected to the raw material liquid inlet of the separation tank.

[0010] Preferably, the circulation pump is connected to a waste barrel.

[0011] Preferably, one end of the condensing coil is connected to a compressor, the compressor is connected to one end of a liquid-cooled condenser, and the other end of the liquid-cooled condenser is connected to the other end of the condensing coil.

[0012] Preferably, the portion of the compressor connected to the liquid-cooled condenser is also connected to an air-cooled condenser, and the air-cooled condenser is connected to the other end of the condensing coil.

[0013] Preferably, an electronic scale is provided below the finished product barrel.

[0014] A method for using an evaporation-condensation separation device comprises the following steps: Step S1: fix the raw material barrel forwardly on the lifting and flipping assembly, start the lifting and flipping assembly to raise the raw material barrel to a required height, and then flip the raw material barrel 180 degrees so that the raw material liquid outlet pipe and the air inlet pipe face downward; Step S2: Start the compressor, the refrigerant enters the liquid-cooled condenser for heat exchange, the temperature of the refrigerant decreases, and the refrigerant enters the condensing coil, the temperature of the liquid-cooled condenser increases, and the temperature is controlled at the gas-liquid conversion temperature of the liquid to be separated, and the raw material liquid in the raw material barrel is prepared for vaporization; Step S3: Start the spray pump to pump the raw material liquid in the raw material barrel into the liquid distribution plate of the separation tank, and the liquid is sprayed out from the spray head and fully atomized; Step S4: Start the pressure differential pump to extract the non-condensable gas in the separation tank, condensation tank and finished product barrel and pump it into the raw material barrel to establish a pressure differential cycle; Step S5: After the atomized raw material liquid is heated by the liquid-cooled condenser, a part of it is vaporized, and the other part flows into the bottom of the separation tank and is heated and vaporized by the heater; Step S6: Due to the pressure difference, the vaporized raw material liquid will rise and enter the condensation tank after isolating the liquid through the air outlet of the isolation grid; Step S7: the condensable gas in the vaporized raw material liquid is cooled into liquid by the condensing coil of the condensing tank; Step S8: the remaining non-condensable gas in the vaporized raw material liquid and the condensable gas condensed into liquid enter the finished product barrel together; Step S9: The non-condensable gas in the finished product barrel is pumped away by the pressure differential pump and pumped into the raw material barrel to establish a pressure difference, so that only the condensable gas condensed into liquid is left in the finished product barrel, thereby purifying the condensable gas and measuring the recovered weight in real time through an electronic scale; Step S10: After the raw material liquid in the raw material barrel is emptied, the spray pump is stopped, and the lifting and flipping assembly is started to flip the raw material barrel back to the normal position and lower it; Step S11: Turn on the circulation pump to pump the liquid at the bottom of the separation tank back into the separation tank, so that the liquid at the bottom continues to be heated and vaporized, and then condensed and enters the finished product barrel until the weight of the finished product barrel no longer increases; Step S12: The finished product barrel is sealed and removed to complete the separation of the liquid at the gas-liquid conversion temperature; Step S13: raising the temperature of the heater, controlling the temperature at the gas-liquid conversion temperature of different liquids, connecting a new finished product barrel, repeating step S11, and separating different liquids in turn at different temperatures; Step S14: repeating step S13 until all the various liquids in the raw liquid are separated one by one; Step S15: Turn off the differential pressure pump and the compressor, connect the circulation pump to the waste barrel, and pump the residual liquid in the separation tank into the waste barrel.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are: The present invention can effectively separate different components in the raw liquid by controlling the temperature and pressure difference. The temperature in the separation tank is controlled from low to high at different gas-liquid conversion temperatures, so that only the target liquid can be condensed after vaporization, thereby achieving efficient separation. When processing media such as R123 Freon, the problem of mutual contamination between media can be effectively solved, thereby ensuring that these media can be safely and efficiently used again after recycling. This feature not only greatly reduces the operating and maintenance costs of the user unit, but also significantly reduces the waste disposal costs, bringing considerable economic benefits to the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a separation device according to an embodiment of the present invention; Figure 2 A front view of a separation device according to an embodiment of the present invention; Figure 3 A side view of a separation device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a lifting and flipping assembly according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the raw material barrel structure of an embodiment of the present invention; Figure 6 This is a schematic diagram of the separation tank structure of an embodiment of the present invention; Figure 7 This is a schematic diagram of the condensing tank structure of an embodiment of the present invention; Figure 8 This is a schematic diagram of the finished barrel structure of an embodiment of the present invention; Fig. 9 It is a schematic diagram of the structure of a compressor and an air-cooled condenser according to an embodiment of the present invention.

[0017] In the figure: 1. Support frame; 2. Lifting and flipping assembly; 201. Load-bearing column; 202. Transmission screw; 203. Lifting motor; 204. Lifting slide block; 205. Rotating shaft; 206. Clamp; 3. Raw material barrel; 4. Raw material liquid outlet pipe; 5. Air inlet pipe; 6. Separation tank; 7. Raw material liquid inlet; 8. Isolation fence air outlet; 9. Spray assembly; 901. Liquid distribution tray; 902. Spray head; 10. Liquid-cooled condenser; 11. Condensation tank; 12. Condensation coil; 13. Air inlet; 14. Condensation liquid outlet; 15. Finished product barrel; 16. Condensation liquid inlet; 17. Air extraction port; 18. Spray pump; 19. Pressure differential pump; 20. Heater; 21. Circulation port; 22. Circulation pump; 23. Waste barrel; 24. Compressor; 25. Air-cooled condenser; 26. Electronic scale. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] See also Figures 1 to 9 , an evaporation condensation separation device embodiment provided by the present invention: An evaporation condensation separation device, comprising A support frame 1, on which a lifting and flipping assembly 2 is arranged; A raw material barrel 3, on which a raw material liquid outlet pipe 4 and an air inlet pipe 5 are provided; A separation tank 6, on which a raw material liquid inlet 7 and a barrier gas outlet 8 are provided, a spray assembly 9 is provided below the raw material liquid inlet 7, and a liquid-cooled condenser 10 is provided below the spray assembly 9; A condensation tank 11, wherein a condensation coil 12 is disposed in the condensation tank 11, and an air inlet 13 and a condensation liquid outlet 14 are disposed on the condensation tank 11; The finished product barrel 15 is provided with a condensation liquid inlet 16 and an air extraction port 17; The raw material barrel 3 is fixed on the lifting and flipping assembly 2, the raw material liquid outlet pipe 4 of the raw material barrel 3 is connected to the raw material liquid inlet 7 of the separation tank 6 through the spray pump 18, the isolation fence air outlet 8 of the separation tank 6 is connected to the air inlet 13 of the condensation tank 11, the condensation liquid outlet 14 of the condensation tank 11 is connected to the condensation liquid inlet 16 of the finished product barrel 15, and the air suction port 17 of the finished product barrel 15 is connected to the air inlet pipe 5 of the raw material barrel 3 through the pressure difference pump 19.

[0020] Different media have different gas-liquid conversion temperatures under a certain pressure. The temperature of the separation tank 6 is controlled at the gas-liquid conversion temperature of the medium to be separated to ensure that only this medium is vaporized and separated at this temperature. Different media are separated in sequence according to the gas-liquid conversion temperature.

[0021] By controlling the temperature and pressure difference, different components in the raw liquid can be effectively separated to achieve the purification of the contaminated liquid. The treatment process of the equipment of the present invention has a fast separation speed, a high purification effect and an effect of no liquid loss, and can effectively solve the problem of mutual contamination between media, thereby ensuring that these media can be safely and efficiently used again after recycling, especially for the treatment of media such as R123 Freon, its performance is particularly outstanding.

[0022] Through efficient purification treatment, the emission of harmful substances is reduced, which is very beneficial to environmental protection.

[0023] Furthermore, the lifting and flipping assembly 2 includes a load-bearing column 201, a transmission screw 202 is provided on the load-bearing column 201, a lifting motor 203 is provided at the top of the transmission screw 202, a lifting slider 204 is provided on the transmission screw 202, a rotating shaft 205 is provided on the lifting slider 204, a clamp 206 is provided on the rotating shaft 205, the raw material barrel 3 is fixed on the clamp 206, so that the raw material liquid in the raw material barrel 3 can be more easily extracted, and the rotating shaft 205 can be equipped with a motor to control the rotation, using existing technology.

[0024] Furthermore, the spray assembly 9 includes a liquid distribution pan 901, and a spray head 902 is provided below the liquid distribution pan 901 to atomize the raw material liquid so that it can be quickly vaporized, thereby improving the separation efficiency.

[0025] Furthermore, a heater 20 is provided at the bottom of the separation tank 6, which can continuously heat the liquid flowing into the bottom of the separation tank 6 and adjust the temperature to adapt to the separation of different types of liquids.

[0026] Furthermore, a circulation port 21 is provided at the bottom of the separation tank 6, and a circulation pump 22 is provided outside the circulation port 21. The circulation pump 22 is connected to the raw material liquid inlet 7 of the separation tank 6. If there is still liquid to be separated that has not been vaporized after being heated by the heater 20, the circulation pump 22 is used to let the liquid stored at the bottom of the separation tank 6 enter the raw material liquid inlet 7 of the separation tank 6 again, and the spraying, atomization and vaporization process is performed again to ensure that the liquid to be separated can be completely vaporized.

[0027] Furthermore, the circulation pump 22 is connected to a waste barrel 23, and the waste remaining after separation is recycled into the waste barrel 23, which is more environmentally friendly.

[0028] Furthermore, one end of the condensing coil 12 is connected to a compressor 24, which is connected to one end of the liquid-cooled condenser 10, and the other end of the liquid-cooled condenser 10 is connected to the other end of the condensing coil 12, thereby ensuring the condensation effect of the condensing coil 12. The portion of the compressor 24 that is connected to the liquid-cooled condenser 10 is also connected to an air-cooled condenser 25, which is connected to the other end of the condensing coil 12. The refrigerant inside the condensing coil 12 is drawn away and compressed by the compressor 24 and then enters the liquid-cooled condenser 10 and the air-cooled condenser 25 respectively. After being cooled by the two condensers, the refrigerant enters the condensing coil 12, thereby ensuring the condensation effect of the condensing coil 12.

[0029] Furthermore, an electronic scale 26 is provided below the finished product barrel 15. By measuring the recovered weight in real time through the electronic scale 26, the progress of the separation process can be understood in real time, which facilitates timely adjustment of operating parameters to ensure the separation effect.

[0030] A method for using an evaporation-condensation separation device comprises the following steps: Step S1: fix the raw material barrel 3 on the lifting and flipping assembly 2 in a positive direction, start the lifting and flipping assembly 2 to raise the raw material barrel 3 to a desired height, and then flip the raw material barrel 3 180 degrees so that the raw material liquid outlet pipe 4 and the air inlet pipe 5 face downward; Step S2: start the compressor 24, the refrigerant enters the liquid-cooled condenser 10 for heat exchange, the temperature of the refrigerant decreases, and the refrigerant enters the condensing coil 12, the temperature of the liquid-cooled condenser 10 increases, and the temperature is controlled at the gas-liquid conversion temperature of the liquid to be separated, and the raw material liquid in the raw material barrel (3) is prepared for vaporization; Step S3: Start the spray pump 18 to pump the raw material liquid in the raw material barrel 3 into the liquid distribution plate 901 of the separation tank 6, and the liquid is sprayed out from the spray head 902 and fully atomized; Step S4: Start the differential pressure pump 19 to extract the non-condensable gas in the separation tank 6, the condensation tank 11 and the finished product barrel 15 and pump it into the raw material barrel 3 to establish a differential pressure cycle; During the pre-use preparation process of the equipment, air will enter the separation tank 6, the condensation tank 11 and the finished product barrel 15. When the equipment is in use, air cannot be condensed. These non-condensable gases are pumped into the raw material barrel 3 through the pressure difference pump 19 to establish a pressure difference, thereby establishing liquid circulation.

[0031] Step S5: After the atomized raw material liquid is heated by the liquid-cooled condenser 10, a part of it is vaporized, and the other part flows into the bottom of the separation tank 6 and is heated and vaporized by the heater 20; Step S6: Due to the pressure difference, the vaporized raw material liquid will rise and enter the condensation tank 11 after passing through the isolation grid air outlet 8 to isolate the liquid; Step S7: the condensable gas in the vaporized raw material liquid is cooled into liquid by the condensation coil 12 of the condensation tank 11; Step S8: the remaining non-condensable gas in the vaporized raw material liquid and the condensable gas condensed into liquid enter the finished product barrel 15 together; Step S9: The non-condensable gas in the finished product barrel 15 is pumped away by the differential pressure pump 19 and pumped into the raw material barrel 3 to establish a pressure difference, so that only the condensable gas condensed into liquid remains in the finished product barrel 15, thereby purifying the condensable gas, and measuring the recovered weight in real time through the electronic scale 26; Step S10: After the raw material liquid in the raw material barrel 3 is emptied, the spray pump 18 is stopped, and the lifting and flipping assembly 2 is started to flip the raw material barrel 3 back to the normal position and lower it; Step S11: Turn on the circulation pump 22 to pump the liquid at the bottom of the separation tank 6 back into the separation tank 6, so that the liquid at the bottom continues to be heated and vaporized, and then condensed and enters the finished product barrel 15, until the weight of the finished product barrel 15 stops increasing; Step S12: The finished product barrel 15 is sealed and removed to complete the separation of the liquid at the gas-liquid conversion temperature; Step S13: raising the temperature of the heater 20, controlling the temperature at the gas-liquid conversion temperature of different liquids, connecting a new finished product barrel 15, repeating step S11, and separating different liquids in turn at different temperatures; Step S14: repeating step S13 until the various liquids in the raw liquid are separated one by one; Step S15 : turning off the differential pressure pump 19 and the compressor 24 , connecting the circulation pump 22 to the waste barrel 23 , and pumping the residual liquid in the separation tank 6 into the waste barrel 23 .

[0032] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An evaporation condensation separation device, characterized in that: include A support frame (1), wherein a lifting and flipping assembly (2) is provided on the support frame (1); A raw material barrel (3), wherein the raw material barrel (3) is provided with a raw material liquid outlet pipe (4) and an air inlet pipe (5); A separation tank (6), wherein the separation tank (6) is provided with a raw material liquid inlet (7) and a barrier gas outlet (8), a spray assembly (9) is provided below the raw material liquid inlet (7), and a liquid-cooled condenser (10) is provided below the spray assembly (9); A condensation tank (11), wherein a condensation coil (12) is arranged in the condensation tank (11), and an air inlet (13) and a condensation liquid outlet (14) are arranged on the condensation tank (11); A finished product barrel (15), wherein the finished product barrel (15) is provided with a condensation liquid inlet (16) and an air extraction port (17); The raw material barrel (3) is fixed on the lifting and flipping assembly (2); the raw material liquid outlet pipe (4) of the raw material barrel (3) is connected to the raw material liquid inlet (7) of the separation tank (6) through a spray pump (18); the isolation grille air outlet (8) of the separation tank (6) is connected to the air inlet (13) of the condensation tank (11); the condensation liquid outlet (14) of the condensation tank (11) is connected to the condensation liquid inlet (16) of the finished product barrel (15); and the air extraction port (17) of the finished product barrel (15) is connected to the air inlet pipe (5) of the raw material barrel (3) through a pressure difference pump (19).

2. The evaporation-condensation separation device according to claim 1, characterized in that: The lifting and flipping assembly (2) comprises a load-bearing column (201), a transmission screw (202) is arranged on the load-bearing column (201), a lifting motor (203) is arranged at the top of the transmission screw (202), a lifting slider (204) is arranged on the transmission screw (202), a rotating shaft (205) is arranged on the lifting slider (204), a clamp (206) is arranged on the rotating shaft (205), and the raw material barrel (3) is fixed on the clamp (206).

3. The evaporation-condensation separation device according to claim 1, characterized in that: The spray assembly (9) comprises a liquid distribution tray (901), and a spray head (902) is arranged below the liquid distribution tray (901).

4. The evaporation-condensation separation device according to claim 1, characterized in that: A heater (20) is provided at the bottom of the separation tank (6).

5. The evaporation-condensation separation device according to claim 1, characterized in that: A circulation port (21) is provided at the bottom of the separation tank (6), a circulation pump (22) is provided outside the circulation port (21), and the circulation pump (22) is connected to the raw material liquid inlet (7) of the separation tank (6).

6. The evaporation-condensation separation device according to claim 5, characterized in that: The circulation pump (22) is connected to a waste barrel (23).

7. The evaporation-condensation separation device according to claim 1, characterized in that: One end of the condensing coil (12) is connected to a compressor (24), the compressor (24) is connected to one end of a liquid-cooled condenser (10), and the other end of the liquid-cooled condenser (10) is connected to the other end of the condensing coil (12).

8. The evaporation-condensation separation device according to claim 7, characterized in that: The portion of the compressor (24) connected to the liquid-cooled condenser (10) is also connected to an air-cooled condenser (25), and the air-cooled condenser (25) is connected to the other end of the condensing coil (12).

9. The evaporation-condensation separation device according to claim 1, characterized in that: An electronic scale (26) is provided below the finished product barrel (15).

10. A method for using the evaporation-condensation separation device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1: fix the raw material barrel (3) on the lifting and flipping assembly (2) in a positive direction, start the lifting and flipping assembly (2) to raise the raw material barrel (3) to a desired height, and then flip the raw material barrel (3) 180 degrees so that the raw material liquid outlet pipe (4) and the air inlet pipe (5) face downwards; Step S2: starting the compressor (24), the refrigerant enters the liquid-cooled condenser (10) for heat exchange, the temperature of the refrigerant decreases, and the refrigerant enters the condensing coil (12), the temperature of the liquid-cooled condenser (10) increases, and the temperature is controlled at the gas-liquid conversion temperature of the liquid to be separated, so as to prepare to vaporize the raw material liquid in the raw material barrel (3); Step S3: starting the spray pump (18) to pump the raw material liquid in the raw material barrel (3) into the liquid distribution plate (901) of the separation tank (6), and the liquid is sprayed out from the spray head (902) to be fully atomized; Step S4: Start the differential pressure pump (19) to extract the non-condensable gas in the separation tank (6), the condensation tank (11) and the finished product barrel (15) and pump it into the raw material barrel (3) to establish a differential pressure cycle; Step S5: After the atomized raw material liquid is heated by the liquid-cooled condenser (10), a portion of it is vaporized, and the other portion flows into the bottom of the separation tank (6) and is heated and vaporized by the heater (20); Step S6: Due to the pressure difference, the vaporized raw material liquid will rise and enter the condensation tank (11) after passing through the isolation grid gas outlet (8) to isolate the liquid; Step S7: the condensable gas in the vaporized raw material liquid is cooled into liquid by the condensation coil (12) of the condensation tank (11); Step S8: the remaining non-condensable gas in the vaporized raw material liquid and the condensable gas condensed into liquid enter the finished product barrel (15); Step S9: the non-condensable gas in the finished product barrel (15) is pumped away by the differential pressure pump (19) and pumped into the raw material barrel (3), thereby establishing a pressure difference so that only the condensable gas condensed into liquid remains in the finished product barrel (15), thereby achieving purification of the condensable gas, and the recovered weight is measured in real time by an electronic scale (26); Step S10: After the raw material liquid in the raw material barrel (3) is evacuated, the spray pump (18) is stopped, and the lifting and flipping assembly (2) is started to flip the raw material barrel (3) back to the normal position and lower it; Step S11: starting the circulation pump (22) to pump the liquid stored at the bottom of the separation tank (6) back into the separation tank (6), so that the liquid stored at the bottom continues to be heated and vaporized, and then condensed and enters the finished product barrel (15), until the weight of the finished product barrel (15) no longer increases; Step S12: sealing and removing the finished product barrel (15) to complete the separation of the liquid at the gas-liquid conversion temperature; Step S13: raising the temperature of the heater (20) to control the temperature at the gas-liquid conversion temperature of different liquids, connecting a new finished product barrel (15), and repeating step S11 to sequentially separate different liquids at different temperatures; Step S14: repeating step S13 until the various liquids in the raw liquid are separated one by one; Step S15: Turn off the differential pressure pump (19) and the compressor (24), connect the circulation pump (22) to the waste barrel (23), and pump the residual liquid in the separation tank (6) into the waste barrel (23).

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