Energy-saving air compressor oil-gas separation device

Abstract

The application relates to the field of air compressor oil-gas separation, in particular to an energy-saving air compressor oil-gas separation device, which comprises a preliminary cooling separation device, a cooling separation box, a cooling pipe line communicated with the external interlayer arranged in the cooling separation box, a first air inlet pipe and a first air outlet pipe arranged on the cooling separation box, a secondary separation device, a separation assembly rotatably connected to the shell, an auxiliary collecting piece arranged outside the separation assembly, a second air inlet pipe and a second air outlet pipe arranged on the secondary separation device, the second air inlet pipe being communicated with the first air outlet pipe, an air cooling and drying device communicated with the second air outlet pipe, the air cooling and drying device being used for carrying out cooling and drying treatment on the air output by the second air outlet pipe, a third air inlet pipe and a third air outlet pipe arranged on the air cooling and drying device, and the third air outlet pipe being communicated with the external interlayer. The application has the effect of improving the oil-gas separation efficiency.

Description

Technical Field

[0001] This application relates to the field of oil-gas separation in air compressors, and in particular to an energy-saving oil-gas separation device for air compressors. Background Technology

[0002] In the process of oil and gas gathering and transportation, the primary task is oil and gas separation. The oil and gas mixture extracted from underground flows along the pipeline. As the flow distance increases, the pressure of the fluid within the pipeline continuously decreases, and dissolved natural gas is continuously released from the crude oil. The purpose of oil and gas separation is to separate the two phases to facilitate transportation and processing. Currently, there are two main methods for oil and gas separation: mechanical separation and coalescence separation. Mechanical separation utilizes collision or cyclone separation. Its principle is that larger oil droplets in the mixture are separated under their own gravity and centrifugal force. Extensive testing has shown that mechanical separation can be used for oil droplets with a diameter greater than 1 micrometer. The other method is coalescence separation, which uses oil and gas separator elements made of glass fiber. Its main function is to coalesce oil droplets with a diameter less than 1 micrometer into larger droplets, which are then separated.

[0003] In the oil-gas separation process, due to the compressibility of air, an air compressor performs mechanical work to reduce its volume and increase its pressure, producing compressed air that can be reused. Compressed air is an important power source. Compared to other energy sources, compressed air is clear and transparent, easy to transport, has no special harmful properties, poses no fire hazard, is not afraid of overload, can work in many adverse environments, and is abundant on the ground. An air compressor is a device used to compress gases.

[0004] Regarding the aforementioned technologies, the inventors believe that separating oil droplets by their own gravity and centrifugal force has the drawback of not being able to simultaneously achieve both separation time and separation effect. Summary of the Invention

[0005] To improve oil-gas separation efficiency, this application provides an energy-saving air compressor oil-gas separation device.

[0006] This application provides an energy-saving oil-gas separator for air compressors, which adopts the following technical solution:

[0007] An energy-saving air compressor oil-gas separator includes:

[0008] A preliminary cooling separation device includes a cooling separation box, the cooling separation box having an outer interlayer, a cooling pipe connected to the outer interlayer inside the cooling separation box, and a first air inlet pipe and a first air outlet pipe passing through the outer interlayer to the interior of the cooling separation box.

[0009] A secondary separation device is connected to the first air outlet pipe. The secondary separation device includes a separation shell, a separation component rotatably connected to the separation shell and arranged along the length direction of the first air outlet pipe, and an auxiliary collection component arranged around the outside of the separation component and located inside the separation shell. The secondary separation device is provided with a second air inlet pipe and a second air outlet pipe, and the second air inlet pipe is connected to the first air outlet pipe.

[0010] An air drying device is connected to the second air outlet pipe to perform air drying treatment on the air output from the second air outlet pipe. The air drying device is equipped with a third air inlet pipe and a third air outlet pipe, and the third air outlet pipe is connected to the outer interlayer.

[0011] By adopting the above technical solution, when separating oil and gas, the extracted oil and gas first pass through a preliminary cooling and separation device. Specifically, the oil and gas enter the cooling separation box through the first air inlet pipe. The oil and gas entering the cooling separation box are high-temperature oil and gas. After contacting the cooling pipes, the alternating hot and cold temperatures cause the oil to liquefy and fall directly to the bottom of the cooling separation box or condense on the cooling pipes under the action of gravity, quickly separating the oil and gas. The oil and gas after preliminary separation enter the separation component through the first air outlet pipe and the second air inlet pipe. The separation component rotates, and the unseparated oil is thrown onto the auxiliary collection device by centrifugal force. The separated oil flows into the bottom of the separation shell. The separated gas enters the air cooling and drying device through the second air outlet pipe and the third air inlet pipe. The moisture in the air is discharged by low temperature. The compressed cold air enters the outer jacket through the third air outlet pipe and is used to circulate and cool the preliminary cooling and separation device. The use of low-temperature compressed air to circulate and cool the oil and gas achieves energy saving. Multiple separations improve the overall oil and gas separation efficiency and purity, saving time and effort.

[0012] Preferably, a first oil storage tank is provided directly below the preliminary cooling separation device, and multiple oil guide pipes are provided between the first oil storage tank and the cooling separation tank. The two ends of the oil guide pipes are respectively connected to the first oil storage tank and the cooling separation tank, and a first oil outlet is provided at the bottom of the first oil storage tank.

[0013] By adopting the above technical solution, after the oil and gas pass through the cooling separation box and the oil is replaced, the oil flows into the first oil storage tank through multiple oil guide pipes for storage. The stored oil can be discharged from the first oil storage tank through the first oil outlet.

[0014] Preferably, there are multiple cooling pipes, both ends of which are connected to the external interlayer, and the multiple cooling pipes are evenly distributed.

[0015] By adopting the above technical solution, multiple cooling pipes work simultaneously to rapidly cool the oil and gas, allowing a large amount of oil to be replaced in a short time, thus accelerating the oil-gas separation efficiency.

[0016] Preferably, the cooling pipe is provided as a single, meandering cooling pipe within the cooling separation box, with both ends of the cooling pipe connected to the external interlayer.

[0017] By adopting the above technical solution, when only one cooling pipe is set up, the utilization area of ​​the cooling pipe is increased by meandering and bending, so that the oil and gas can fully contact the cooling pipe and quickly precipitate a large amount of oil, thus meeting the conditions for rapid separation of oil and gas.

[0018] Preferably, a fourth air inlet pipe and a fourth air outlet pipe are provided on the outer interlayer. One end of the fourth air inlet pipe is provided on the outer interlayer, and the end of the fourth air inlet pipe away from the outer interlayer is connected to the third air outlet pipe. The fourth air inlet pipe is located near the top of the outer interlayer, and the fourth air outlet pipe is located near the bottom of the outer interlayer.

[0019] By adopting the above technical solution, the compressed air, after being dried by the air cooling device, re-enters the outer jacket and is transported and utilized by the cooling pipeline to cool and separate the oil from the high-temperature oil and gas, thus recycling energy and achieving energy saving. The compressed air after use is discharged through the fourth outlet pipe to the place where it is needed.

[0020] Preferably, a flexible sealing structure is provided at the penetration points of the fourth air inlet pipe and the fourth air outlet pipe into the outer interlayer, and multiple parallel air grooves are provided on the flexible sealing structure around the periphery of the fourth air inlet pipe and the fourth air outlet pipe.

[0021] By adopting the above technical solution, the flexible sealing structure has better air tightness. When gas leakage occurs, multiple air channels will be filled with gas. At this time, the gas will squeeze the air channels, thereby causing the flexible sealing structure to expand under the action of air pressure, increasing the sealing performance.

[0022] Preferably, both the fourth air inlet pipe and the fourth air outlet pipe are equipped with pressure detection devices, and a manual pressure relief valve is provided above the outer interlayer.

[0023] By adopting the above technical solution, the pressure detection device monitors the pressure inside the outer interlayer in real time, avoiding equipment damage due to excessive pressure. When excessive pressure is detected, the manual pressure relief valve is opened to balance the air pressure inside the outer interlayer with the external atmospheric pressure, thus playing a protective role.

[0024] Preferably, the separation assembly includes a rotating separation shaft and a plurality of centrifugal discs fixed to the rotating separation shaft, each centrifugal disc having a plurality of compartments, and the second air inlet pipe intakes air in the direction of the length of the rotating separation shaft.

[0025] By adopting the above technical solution, the oil and gas after preliminary separation enter the secondary separation device. During the process of the centrifugal disc rotating driven by the separation shaft, the oil and gas are cut by multiple compartments. Then, due to the centrifugal force, the oil is thrown out, achieving the effect of secondary separation.

[0026] Preferably, the auxiliary collection component includes an auxiliary pad with multiple meandering spaces, the openings of which face the compartments.

[0027] By adopting the above technical solution, the ejected oil first falls onto the auxiliary pad, then gathers through multiple meandering spaces to form oil droplets or oil, and finally flows to the bottom of the separation shell.

[0028] Preferably, one first air outlet pipe and one secondary separation device constitute a set of secondary separation components, and the secondary separation components may be provided in one or more sets.

[0029] By adopting the above technical solution, under normal circumstances, one set of separation components can efficiently separate oil and gas. However, for large quantities of oil and gas, multiple sets of separation components can be used together as needed to improve separation efficiency.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. During oil-gas separation, the extracted oil and gas first pass through a preliminary cooling separation device. Specifically, the oil and gas enter the cooling separation box through the first inlet pipe. The oil and gas entering the cooling separation box are high-temperature oil and gas. Upon contact with the cooling pipes, the alternating hot and cold temperatures cause the oil to liquefy. Under the influence of gravity, the oil falls directly to the bottom of the cooling separation box or condenses on the cooling pipes, rapidly separating the oil and gas. The oil and gas after preliminary separation enter the separation component through the first outlet pipe and the second inlet pipe. The separation component rotates, and the centrifugal force throws the unseparated oil onto the auxiliary collection device. The separated oil flows into the bottom of the separation shell. The separated gas enters the air cooling and drying device through the second outlet pipe and the third inlet pipe. The moisture in the air is discharged through the low temperature. The compressed cold air enters the outer jacket through the third outlet pipe and is circulated to cool the preliminary cooling separation device. The use of low-temperature compressed air for cooling the oil and gas achieves energy saving. Multiple separations improve the overall oil-gas separation efficiency and purity, saving time and effort.

[0032] 2. After the compressed air has been dried by the air cooling device, it re-enters the outer jacket and is transported and utilized by the cooling pipeline to cool and separate the oil from the high-temperature oil and gas, thus recycling energy and achieving energy saving. The used compressed air is discharged through the fourth outlet pipe to the place where it is needed.

[0033] 3. The oil and gas after the initial separation enter the secondary separation device. During the process of the centrifugal disc rotating driven by the separation shaft, the oil and gas are cut by multiple compartments. Then, due to the centrifugal force, the oil is thrown out, achieving the effect of secondary separation. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the energy-saving air compressor oil-gas separator in the embodiments of this application;

[0035] Figure 2 This is a front cross-sectional view of an embodiment of this application;

[0036] Figure 3 This is a magnified view of part A.

[0037] Figure 4 This is a schematic diagram illustrating the internal structure of an air-cooling and drying device.

[0038] Explanation of reference numerals in the attached drawings: 1. Preliminary cooling and separation device; 11. Cooling and separation box; 12. External interlayer; 121. Fourth air inlet pipe; 122. Fourth air outlet pipe; 13. Cooling pipeline; 14. First air inlet pipe; 15. First air outlet pipe; 2. Secondary separation device; 21. Separation shell; 22. Separation assembly; 221. Rotating separation shaft; 222. Centrifugal disc; 223. Divider; 23. Auxiliary collection component; 231. Auxiliary pad; 232. Detour space 24. Second air inlet pipe; 25. Second air outlet pipe; 3. Air drying device; 31. Drying housing; 311. Distribution box; 312. Pressure protector; 313. Drying pressure gauge; 32. Water vapor separator; 33. Pre-cooling and reheater; 34. Heat exchanger; 35. Cooling fan; 36. Manual drain valve; 37. Third air inlet pipe; 38. Third air outlet pipe; 4. First oil storage tank; 41. Oil guide pipe; 5. Flexible sealing structure; 51. Air duct. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0040] This application discloses an energy-saving air compressor oil-gas separator. (Refer to...) Figure 1 and Figure 2The energy-saving air compressor oil-gas separation device includes a preliminary cooling separation device 1, a secondary separation device 2 connected to the preliminary cooling device, and an air cooling and drying device 3 connected to both the secondary separation device 2 and the preliminary cooling separation device 1. The preliminary cooling separation device 1 includes a cooling separation chamber 11, which has an external interlayer 12. Optionally, the cooling separation chamber 11 has a square structure; in this embodiment, it is rectangular. The thickness of the external interlayer 12 can be selected from various options, depending on the pressure that the cooling separation chamber 11 can withstand.

[0041] Reference Figure 1 and Figure 2 The cooling separation chamber 11 is equipped with cooling pipes 13, which may be one or more. Optionally, multiple cooling pipes 13 are provided, with both ends of each cooling pipe 13 connected to the external interlayer 12. Preferably, the multiple cooling pipes 13 are evenly distributed. Optionally, the multiple cooling pipes 13 are arranged along the height direction of the cooling separation chamber 11 and are parallel to each other; alternatively, the multiple cooling pipes 13 are arranged along the lateral direction of the cooling separation chamber 11 and are parallel to each other. In this embodiment, multiple cooling pipes 13 are arranged along the height direction of the cooling separation chamber 11. During oil-gas separation, the oil condensed and liquefied on the cooling pipes 13 flows to the bottom of the cooling separation chamber 11 under the action of gravity and the guiding effect of the cooling pipes 13. The simultaneous action of multiple cooling pipes 13 rapidly cools the oil and gas, allowing a large amount of oil to be displaced in a short time, thus accelerating the oil-gas separation efficiency.

[0042] Reference Figure 1 and Figure 2 Optionally, a single cooling pipe 13 is provided, with both ends of the cooling pipe 13 connected to the external interlayer 12. Preferably, the cooling pipe 13 is arranged in a winding manner within the cooling separation box 11, and the winding cooling pipe 13 has multiple parallel sections. Optionally, the multiple parallel sections are parallel to one side wall of the cooling separation box 11 in the height direction; alternatively, the multiple parallel sections are parallel to one top or bottom of the cooling separation box 11 in the lateral direction. Preferably, the multiple parallel sections are parallel to one side wall of the cooling separation box 11 in the height direction. During oil-gas separation, the oil condensed and liquefied on the cooling pipe 13 flows to the bottom of the cooling separation box 11 under the action of gravity and the guiding effect of the cooling pipe 13.

[0043] Reference Figure 1 and Figure 2The cooling separation chamber 11 is provided with a first air inlet pipe 14 and a first air outlet pipe 15 that pass through the outer interlayer 12 and directly connect to the interior of the cooling separation chamber 11. The first air inlet pipe 14 is used to input unseparated oil and gas into the cooling separation chamber 11, and the first air outlet pipe 15 is used to transport the oil and gas separated by the preliminary cooling separation device 1. The oil and gas separated by the preliminary cooling separation device 1 are input into the secondary separation device 2 through the first air outlet pipe 15. Preferably, a first oil storage tank 4 is provided directly below the preliminary cooling separation device 1, that is, the first oil storage tank 4 is located directly below the cooling separation chamber 11. Optionally, the first oil storage tank 4 and the cooling separation chamber 11 can share a wall for separation.

[0044] Reference Figure 1 and Figure 2 Multiple oil guide pipes 41 are provided between the first oil storage tank 4 and the cooling separation device. The two ends of each oil guide pipe 41 are connected to the first oil storage tank 4 and the cooling separation tank 11, respectively. Preferably, the multiple oil guide pipes 41 are evenly arranged. In an optional embodiment, all multiple oil guide pipes 41 are rigid metal pipes; in an optional embodiment, the multiple oil guide pipes 41 are flexible rubber hoses. A first oil outlet is also provided at the bottom of the first oil storage tank 4. Optionally, a rubber stopper is provided at the first oil outlet; alternatively, a threaded structure is provided at the first oil outlet, and the first oil outlet is sealed with a threaded cap. After the oil and gas pass through the cooling separation tank 11 and the oil is displaced, the oil flows into the first oil storage tank 4 through the multiple oil guide pipes 41 for storage. The stored oil can be discharged from the first oil storage tank 4 through the first oil outlet.

[0045] Reference Figure 1 and Figure 2 The secondary separation device 2 includes a separation housing 21, a separation assembly 22 rotatably connected to the separation housing 21 and arranged along the length of the first exhaust pipe 15, and an auxiliary collection component 23 surrounding the separation assembly 22. The separation housing 21 is elongated along the direction of the first exhaust pipe 15, and a second oil tank is provided at the bottom of the separation housing 21, which can be used as a support leg. The separation housing 21 is provided with a second air inlet pipe 24 communicating with the first exhaust pipe 15, and a second exhaust pipe 25 for outputting the compressed air after secondary separation. The separation assembly 22 includes a rotating separation shaft 221 and multiple centrifugal discs 222 fixed to the rotating separation shaft 221. Each centrifugal disc 222 is provided with multiple compartments 223, and the second air inlet pipe 24 intakes air along the length of the rotating separation shaft 221. The oil and gas after initial separation enter the secondary separation device 2. During the process of the centrifugal disc 222 rotating driven by the separation shaft, the oil and gas are cut by multiple compartments 223. Then, due to the centrifugal force, the oil is thrown out, achieving the effect of secondary separation.

[0046] Reference Figure 1 and Figure 2 The auxiliary collection component 23 includes an auxiliary pad 231 with multiple meandering spaces 232. The openings of the multiple meandering spaces 232 of the auxiliary pad 231 face the grid 223. The shape of the meandering spaces 232 is not fixed, and they serve to divert oil and gas. At the same time, oil droplets thrown out by centrifugal force can first fall onto the auxiliary pad 231 and collect and flow along the grooves of the meandering spaces 232 until the oil flows into the second oil storage tank. Optionally, the auxiliary pad 231 can be made of other flexible materials that do not react with oil; preferably, the auxiliary pad 231 is a rubber pad. A first vent pipe 15 and a secondary separation device 2 constitute a set of secondary separation components. The secondary separation components 22 can be provided in one or more sets. In this embodiment, two sets of secondary separation components 22 are used as an example for explanation. The two sets of secondary separation components 22 are arranged side by side. Under normal circumstances, one set of separation components 22 can efficiently separate oil and gas, but for a large amount of oil and gas, multiple sets of separation components 22 can be used together as needed to improve separation efficiency.

[0047] Reference Figure 2 and Figure 4 The air drying device 3 is connected to the second outlet pipe 25 to perform air drying treatment on the air output from the second outlet pipe 25. The air drying device 3 includes a drying shell 31, a water vapor separator 32 installed inside the drying shell 31, a precooling and reheating unit 33 connected to the water vapor separator 32, a heat exchanger 34, a cooling fan 35, a manual drain valve 36, and a third air inlet pipe 37 and a third air outlet pipe 38 installed on the drying shell 31. The third air inlet pipe 37 is connected to the water vapor separator 32. The compressed air after air drying treatment passes through the precooling and reheating unit 33. The third air outlet pipe 38 is connected to the precooling and reheating unit 33. The treated low-temperature compressed air is input into the outer jacket 12 through the third air outlet pipe 38. The air drying device 3 is also equipped with an electrical distribution box 311 that provides energy to the air drying device 3, a pressure protector 312 that protects the interior, and multiple air drying pressure gauges 313. After the compressed air passes through the air cooling and drying device 3, the compressed air is cooled down, causing the water vapor inside the compressed air to freeze. Then, the dry, low-temperature compressed air is output through the third outlet pipe 38.

[0048] Reference Figure 2A fourth air inlet pipe 121 and a fourth air outlet pipe 122 are installed on the outer interlayer 12. One end of the fourth air inlet pipe 121 is inserted into the outer interlayer 12, and the end of the fourth air inlet pipe 121 away from the outer interlayer 12 is connected to the third air outlet pipe 38. The fourth air inlet pipe 121 is located near the top of the outer interlayer 12, and the fourth air outlet pipe 122 is located near the bottom of the outer interlayer 12. The compressed air, after being dehydrated by the air drying device 3, re-enters the outer interlayer 12 and is transported and utilized by the cooling pipe 13 to cool and separate the oil from the high-temperature oil and gas, recycling energy and achieving energy saving. The used compressed air is discharged through the fourth air outlet pipe 122 to be used where needed.

[0049] Reference Figure 2 and Figure 3 Flexible sealing structures 5 are provided at the penetration points of the fourth air inlet pipe 121 and the fourth air outlet pipe 122 into the outer interlayer 12. Multiple parallel air grooves 51 are arranged around the periphery of the flexible sealing structure 5. The flexible sealing structure 5 has better airtightness. When gas leakage occurs, the multiple air grooves 51 will fill with gas, which will compress the air grooves 51, causing the flexible sealing structure 5 to expand under air pressure, increasing the sealing performance. Pressure detection devices are provided on both the fourth air inlet pipe 121 and the fourth air outlet pipe 122, and a manual pressure relief valve is provided above the outer interlayer 12. The pressure detection devices monitor the pressure inside the outer interlayer 12 in real time to prevent equipment damage due to excessive pressure. When excessive pressure is detected, the manual pressure relief valve is opened to balance the air pressure inside the outer interlayer 12 with the external atmospheric pressure, thus providing protection.

[0050] The implementation principle of this application embodiment is as follows: When separating oil and gas, the extracted oil and gas first pass through the preliminary cooling separation device 1. Specifically, it enters the cooling separation box 11 through the first air inlet pipe 14. The oil and gas entering the cooling separation box 11 is high-temperature oil and gas. After contacting the cooling pipe 13, the alternating hot and cold temperatures cause the oil to liquefy. Under the action of gravity, it falls directly to the bottom of the cooling separation box 11 or condenses on the cooling pipe 13, quickly separating the oil and gas. The oil and gas after preliminary separation enter the separation component 22 through the first air outlet pipe 15 and the second air inlet pipe 24. 2. Rotation causes the unseparated oil to be thrown onto the auxiliary collection component 23 by centrifugal force. The separated oil flows into the bottom of the separation shell 21. The separated gas enters the air cooling and drying device 3 through the second air outlet pipe 25 and the third air inlet pipe 37. The moisture in the air is discharged by low temperature. The compressed cold air enters the outer jacket 12 through the third air outlet pipe 38 and is used to cool the preliminary cooling separation device 1. The cold air circulation of low temperature compressed air is used to cool the oil and gas, which has the effect of energy saving. Multiple separations improve the overall oil and gas separation efficiency and separation purity, saving time and effort.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An energy-saving air compressor oil-gas separator, characterized in that, include: A preliminary cooling separation device (1) includes a cooling separation box (11), the cooling separation box (11) is provided with an outer interlayer (12), the cooling separation box (11) is provided with a cooling pipe (13) communicating with the outer interlayer (12), and the cooling separation box (11) is provided with a first air inlet pipe (14) and a first air outlet pipe (15) passing through the outer interlayer (12) to the inside of the cooling separation box (11); A secondary separation device (2) is connected to the first air outlet pipe (15). The secondary separation device (2) includes a separation shell (21), a separation component (22) rotatably connected to the separation shell (21) and arranged along the length direction of the first air outlet pipe (15), and an auxiliary collection component (23) arranged around the outside of the separation component (22) and located inside the separation shell (21). A second air inlet pipe (24) and a second air outlet pipe (25) are arranged on the secondary separation device (2). The second air inlet pipe (24) is connected to the first air outlet pipe (15). An air drying device (3) is connected to the second air outlet pipe (25) to perform air drying treatment on the air output from the second air outlet pipe (25). The air drying device (3) is provided with a third air inlet pipe (37) and a third air outlet pipe (38). The third air outlet pipe (38) is connected to the outer interlayer (12). The outer interlayer (12) is provided with a fourth air inlet pipe (121) and a fourth air outlet pipe (122). One end of the fourth air inlet pipe (121) is provided on the outer interlayer (12), and the other end of the fourth air inlet pipe (121) away from the outer interlayer (12) is connected to the third air outlet pipe (38). The fourth air inlet pipe (121) is located near the top of the outer interlayer (12), and the fourth air outlet pipe (122) is located near the bottom of the outer interlayer (12). Flexible sealing structures (5) are provided at the penetration points of the fourth air inlet pipe (121) and the fourth air outlet pipe (122) into the outer interlayer (12). Multiple parallel air grooves (51) are provided on the flexible sealing structure (5) around the periphery of the fourth air inlet pipe (121) and the fourth air outlet pipe (122).

2. The energy-saving air compressor oil-gas separator according to claim 1, characterized in that: A first oil storage tank (4) is provided directly below the preliminary cooling separation device (1). Multiple oil guide pipes (41) are provided between the first oil storage tank (4) and the cooling separation box (11). The two ends of the oil guide pipes (41) are respectively connected to the first oil storage tank (4) and the cooling separation box (11). A first oil outlet is provided at the bottom of the first oil storage tank (4).

3. The energy-saving air compressor oil-gas separator according to claim 2, characterized in that: The cooling pipes (13) are provided in multiple ways, and both ends of the cooling pipes (13) are connected to the outer interlayer (12). The multiple cooling pipes (13) are evenly arranged.

4. The energy-saving air compressor oil-gas separator according to claim 2, characterized in that: The cooling pipe (13) is provided in one way. The cooling pipe (13) is arranged in a meandering manner inside the cooling separation box (11). Both ends of the cooling pipe (13) are connected to the outer interlayer (12).

5. The energy-saving air compressor oil-gas separator according to claim 1, characterized in that: Pressure detection devices are provided on both the fourth air inlet pipe (121) and the fourth air outlet pipe (122), and a manual pressure relief valve is provided above the outer interlayer (12).

6. The energy-saving air compressor oil-gas separator according to claim 1, characterized in that: The separation assembly (22) includes a rotating separation shaft (221) and a plurality of centrifugal discs (222) fixed on the rotating separation shaft (221). Each centrifugal disc (222) is provided with a plurality of compartments (223). The second air inlet pipe (24) intakes air in the direction of the length of the rotating separation shaft (221).

7. The energy-saving air compressor oil-gas separator according to claim 6, characterized in that: The auxiliary collection component (23) includes an auxiliary pad (231) with multiple meandering spaces (232) and the openings of the multiple meandering spaces (232) of the auxiliary pad (231) facing the compartment (223).

8. The energy-saving air compressor oil-gas separator according to claim 7, characterized in that: A first air outlet pipe (15) and a secondary separation device (2) constitute a set of secondary separation components, and the secondary separation components (22) may be provided in one or more sets.

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