Air compressor oil gas dual recovery method and device

Abstract

The application discloses an air compressor oil-gas double-recovery method and device, relates to the technical field of air compressor waste heat recovery, and comprises an air compressor and a high-temperature oil-gas mixing pipe installed in the air compressor. The tail end of the high-temperature oil-gas mixing pipe is provided with an oil-gas separator for separating oil and gas. Two groups of output ports are formed on the other side of the oil-gas separator. One group of the output ports is connected with a gas pipe for conveying gas, and the other group of the output ports is connected with an oil pipe for conveying oil. The air compressor gas heat energy recovery structure and the oil heat energy recovery structure can recover and utilize the gas heat energy and the oil heat energy in the air compressor, so that the heat energy is used for heating water, thereby meeting the bathing water demand of mine workers and further reducing the overall energy consumption during the whole mine operation.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery technology for air compressors, specifically to a method and apparatus for dual oil and gas recovery in air compressors. Background Technology

[0002] An air compressor, also known as an air compressor, is a machine that compresses air to increase gas pressure or transport gas. Air compressors come in three types: piston, centrifugal, and screw. They are mainly used to drive various pneumatic tools and in braking and control applications. In the food and pharmaceutical industries, air compressors are mainly used to compress air to agitate slurries. Noise control of air compressors mainly employs three methods: silencers, soundproof tunnels, and sound insulation technology.

[0003] Mining operations rely on the kinetic energy provided by air compressors. These air compressors are typically located in dedicated machine rooms on the ground. During operation, the compressed air generates 80-90 degrees Celsius of heat energy inside the air compressor, and the high-temperature oil used for lubrication also generates 70-80 degrees Celsius. In current technology, this heat needs to be dissipated through a cooling system. Therefore, the energy consumed by the entire air compressor not only requires the compression of air but also the cooling of the large amount of heat generated inside the air compressor. In other words, the energy utilization rate of air compressors in current technology is relatively low.

[0004] Therefore, in order to improve the energy utilization rate of air compressors and reduce energy consumption, we propose a device and method for dual recovery of air compressor oil and gas heat energy, so as to recover and utilize the gas heat energy and oil heat energy in the air compressor, so that this part of the heat energy can be used to heat water, thereby meeting the bathing water needs of mine workers and further reducing the overall energy consumption during the entire mine operation. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a method and apparatus for dual oil and gas recovery in air compressors to solve the technical problems mentioned in the background above.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an air compressor oil-gas dual recovery device, comprising an air compressor and a high-temperature oil-gas mixing pipe installed inside the air compressor. An oil-gas separator is installed at the end of the high-temperature oil-gas mixing pipe to separate the oil and gas. A recovery box is installed on one side of the oil-gas separator, and a water tank is installed inside the recovery box. A first temperature sensor and a water level sensor are installed inside the water tank to control the water inlet and outlet. An outlet pipe communicating with a bathing device is opened on the outer wall of the water tank. A first winding pipe communicating with an air pipe is wound around the upper half of the water tank, while a second winding pipe communicating with an oil pipe is wound around the lower half of the water tank.

[0007] By adopting the above technical solution, the heat energy of air and oil in the air compressor can be recovered and utilized, so that this part of the heat energy can be used to heat water, thereby meeting the bathing water needs of mine workers and further reducing the overall energy consumption during the entire mine operation.

[0008] The invention is further configured such that a first preheating box is installed inside the recycling bin above the water tank, and the outer wall of the first preheating box is connected to a water pipe that is connected to an external cold water source through an electrically controlled valve, while the bottom wall of the first preheating box is connected to a water pipe that is connected to the water tank through an electrically controlled valve. An air outlet pipe that is connected to a first winding tube is installed through the inside of the first preheating box, and an air cooler is connected to the end of the air outlet pipe. The output end of the air cooler is connected to the user end through an air pipe.

[0009] By adopting the above technical solution, the water in the first preheating tank can be heated.

[0010] The invention is further configured such that a hollow sleeve is slidably sleeved on the outer wall of the air outlet pipe, and the hollow sleeve is vertically connected to the outer wall of the air outlet pipe. The hollow sleeve has a cavity with an air inlet valve at the top, so as to heat the air in the cavity through the heat energy of the air outlet pipe. The outer wall of the hollow sleeve is provided with multiple sets of annularly distributed air heating pipes with vertical spacing, and the ends of the air heating pipes are connected to the inside of the cavity. A second temperature sensor is installed inside the cavity, and a small air pump with an output end connected to the air heating pipe is installed at the end of each set of air heating pipes inside the cavity. The small air pump is electrically connected to the second temperature sensor through a single-chip microcomputer. A pressure valve is provided on the outer wall of the air heating pipe.

[0011] By adopting the above technical solution, the air in the cavity is heated by thermal radiation, and then the water in the first preheating box is preheated by introducing the air into the air heating pipe.

[0012] The invention is further configured such that a second preheating box is installed inside the recovery box below the water tank, and the wall of the second preheating box is connected to a water pipe that is connected to an external cold water source through an electrically controlled valve. The top wall of the second preheating box is connected to a water pipe that is connected to the water tank through an electrically controlled valve via a water pump. A box body is provided above the second preheating box and below the water tank to realize the utilization of the kinetic energy of the oil.

[0013] By adopting the above technical solution, the water in the second preheating box can be preheated before entering the water tank, reducing the heating time of the water tank and thus improving the efficiency of water supply.

[0014] The present invention is further configured such that a feed inlet is provided at the top of the box body and the feed inlet is connected to the end of the second winding tube, a discharge port for oil to flow out is provided at the bottom of the box body, a drive chamber for oil flow is provided inside the box body, a rotating shaft is installed at the center of the inside of the box body, and multiple sets of annularly distributed turbine blades are installed on the outer wall of the rotating shaft.

[0015] By adopting the above technical solution, the kinetic energy of the oil flow can be utilized to drive the turbine blades.

[0016] The invention is further configured such that an oil inlet pipe communicating with the discharge port is provided between the housing and the second preheating box, and a connecting shaft extending into the interior of the second preheating box is synchronously connected to the end of the rotating shaft. Multiple sets of oil heating pipes with spacing are provided at the bottom of the oil inlet pipe, and each set of oil heating pipes is communicating with the interior of the oil inlet pipe. An oil outlet pipe is provided below the second preheating box, and the end of each set of oil heating pipes is communicating with the interior of the oil outlet pipe. An oil outlet pipe is connected to the bottom of the oil outlet pipe, and an oil cooler is connected to the end of the oil outlet pipe. The oil cooler is connected to the cooling system of the air compressor.

[0017] By adopting the above technical solution, multiple sets of oil heating tubes can heat water evenly, improving the quality and efficiency of preheating.

[0018] The invention is further configured such that a mixing chamber is provided inside the oil inlet pipe, and a drive gear is installed at the center of the mixing chamber. The top end of the drive gear is fixedly connected to the bottom end of the connecting shaft to drive the drive gear. Multiple sets of driven gears mesh on both sides of the drive gear. Each set of driven gears is synchronously connected to the oil heating pipe. The outer wall of the oil heating pipe is provided with annularly distributed stirring blades. A central plate is provided inside the oil heating pipe, and multiple sets of annularly distributed connecting skeletons are fixed to the outer wall of the central plate. Each set of connecting skeletons extends to the inner wall of the oil heating pipe. An opening is formed between every two sets of connecting skeletons to allow oil to enter the oil heating pipe. The top opening of the oil heating pipe is dynamically sealed to the bottom wall of the oil inlet pipe and the top wall of the oil outlet pipe.

[0019] By adopting the above technical solution, the oil heating tube is driven, which enables the stirring blade to rotate, thereby achieving the stirring effect on the water in the second preheating box, resulting in better preheating effect and efficient secondary utilization of oil heat energy.

[0020] The method and device for dual oil and gas recovery in air compressors include the following steps;

[0021] S1. First, the gas heat energy and oil heat energy generated during the operation of the air compressor will be separated by the oil-gas separator, so that the gas and oil flow separately.

[0022] S2. Subsequently, the gaseous thermal energy will heat the water tank through heat transfer. Similarly, the thermal energy of the oil will also heat the water tank through heat transfer.

[0023] S3. After the heat energy of the gas and oil is utilized once, a preheating water tank is set up on the path of the gas and oil to make secondary use of the heat energy of the gas and oil, so that the water to be added to the water tank can be preheated before being added.

[0024] S4. Finally, the gas will flow to the user end through the air cooler, while the oil will flow back to the air compressor's cooling system through the oil cooler.

[0025] In summary, the present invention has the following main beneficial effects:

[0026] 1. This invention, by setting up a water tank, a first winding tube, and a second winding tube, firstly, heat-carrying gas and oil enter the oil-gas separator through a high-temperature oil-gas mixing pipe, causing the oil and gas to separate and enter the oil pipe and gas pipe respectively. Subsequently, they flow into the first and second winding tubes respectively. The high-temperature gas and oil flowing through the winding tubes transfer heat to the water tank and the water in the tank through heat transfer, thereby heating the water in the tank. After the water in the tank reaches the required temperature, the first temperature sensor will activate the electronically controlled valve via a microcontroller. At this time, the water in the water tank will flow out to the water storage tank of the bathing equipment to supply the mine workers with bathing. When the water in the water tank is lower than a certain height, the water outlet electric control valve will close and at the same time the water outlet electric control valves of the first preheating tank and the second preheating tank will be activated. At this time, the water in the preheating tank will enter the water tank to replenish the water until the set water level is reached. Since the water entering the water tank is preheated, it can take less time and consume more heat energy when heating the water in the water tank, so as to achieve efficient and high-quality heating of water and solve the problem of large water consumption during concentrated periods.

[0027] 2. This invention, by setting up a first preheating box and a second preheating box, allows gas to flow out of the first winding tube and into the outlet pipe. As the gas flows through the first preheating box, it heats the air inside the hollow sleeve cavity. When the temperature in the cavity reaches the target, the air pump starts, extracting the hot air and delivering it to the gas heating pipe. This gas heating pipe efficiently heats the water in the first preheating box over a large area, improving heating efficiency and quality. Simultaneously, the air in the first preheating box re-enters the cavity through the inlet valve and is heated again. The air pump continuously supplies hot gas to the gas heating pipe. When the gas pressure in the gas heating pipe exceeds the pressure valve's threshold, the gas is ejected from the pressure valve into the water. Under the force of the gas ejection, the gas heating pipe rotates due to the reaction force of the water, thus stirring the water in the first preheating box and further improving the preheating quality and efficiency of the water, thereby further enhancing the heating efficiency and quality of the water tank. The gas is then discharged through the outlet pipe. The oil flows through the pipe into the air cooler and eventually to the user end. Similarly, after the oil flows out of the second winding tube, it enters the housing through the inlet and flows into the drive chamber to drive the turbine blades to rotate. Finally, it flows out from the outlet and enters the feed pipe. Through the dispersion effect of the feed pipe, the oil flows into multiple sets of oil heating pipes. The oil heating pipes use heat transfer to heat the water in the second preheating tank. Then, the oil in all the oil heating pipes will collect in the oil outlet pipe and flow out to the oil cooler. Finally, it flows back to the air compressor's cooling system. Furthermore, after the turbine blades rotate, they will drive the connecting shaft to rotate. The connecting shaft will then drive the center plate to rotate. The center plate will then drive the oil heating pipes to rotate through multiple sets of connecting frames. This allows the oil heating pipes to drive the stirring blades to rotate, thereby achieving the stirring effect on the water in the second preheating tank. This improves the heating efficiency and quality of the water in the second preheating tank, further improving the heating quality and efficiency of the water tank. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the internal structure of the recycling device of the present invention;

[0029] Figure 2 For the present invention Figure 1 Enlarged view of section A in the image;

[0030] Figure 3 This is a schematic diagram of the hydraulic drive structure of the present invention;

[0031] Figure 4 This is a schematic diagram of the internal structure of the hydraulic drive system of the present invention.

[0032] Figure 5 This is a schematic diagram of the water tank heating structure of the present invention;

[0033] Figure 6This is a schematic diagram of the interior of the first preheating water tank of the present invention;

[0034] Figure 7 This is a schematic diagram of the interior of the second preheating water tank of the present invention;

[0035] Figure 8 This is a schematic diagram of the internal structure of the oil heating tube of the present invention.

[0036] In the diagram: 1. High-temperature oil-gas mixing pipe; 2. Oil-gas separator; 3. Gas pipe; 4. Oil pipe; 5. Recovery box; 6. Water tank; 7. First winding pipe; 8. Second winding pipe; 9. First preheating box; 10. Gas outlet pipe; 11. Hollow sleeve; 12. Cavity; 13. Gas heating pipe; 14. Small air pump; 15. Pressure valve; 16. Second preheating box; 17. Feed inlet; 18. Box body; 19. Discharge outlet; 20. Drive chamber; 21. Rotating shaft; 22. Turbine fan blade; 23. Oil inlet pipe; 24. Connecting shaft; 25. Oil heating pipe; 26. Oil outlet pipe; 27. Oil outlet pipe; 28. Mixing chamber; 29. ​​Drive gear; 30. Driven gear; 31. Stirring blade; 32. Center plate; 33. Connecting frame. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] The embodiments of the present invention will now be described.

[0039] Air compressor oil and gas dual recovery device, such as Figure 1-8 As shown, it includes an air compressor and a high-temperature oil-gas mixing pipe 1 installed inside the air compressor. An oil-gas separator 2 is installed at the end of the high-temperature oil-gas mixing pipe 1 to separate oil and gas. Two sets of output ports are opened on the other side of the oil-gas separator 2. One set of output ports is connected to an air pipe 3 to transport gas, while the other set of output ports is connected to an oil pipe 4 to transport oil.

[0040] Please see Figure 1 and Figure 6 The first preheating box 9 can reuse the heat energy of the gas to heat the water in the preheating box.

[0041] Specifically, a recovery box 5 is installed on one side of the oil-gas separator 2. Inside the recovery box 5, above the water tank 6, a first preheating box 9 is installed. The outer wall of the first preheating box 9 is connected to a water pipe that is connected to an external cold water source via an electrically controlled valve. The bottom wall of the first preheating box 9 is connected to a water pipe that is connected to the water tank 6 via an electrically controlled valve. An air outlet pipe 10, which is connected to the first winding pipe 7, is installed through the interior of the first preheating box 9. An air cooler is connected to the end of the air outlet pipe 10. The output end of the air cooler is connected to the user end via an air pipe. A hollow sleeve 11 is slidably sleeved on the outer wall of the air outlet pipe 10, and the hollow sleeve 11 and the outer wall of the air outlet pipe 10 are vertically connected at the upper limit. The hollow sleeve 11 has a cavity 12 with an air inlet valve at the top, so that the air in the cavity 12 can be heated by the heat energy of the air from the air outlet pipe 10. The outer wall of the hollow sleeve 11 is provided with multiple sets of annularly distributed air heating pipes 13 with vertical spacing, and the ends of the air heating pipes 13 are connected to the inside of the cavity 12. A second temperature sensor is installed inside the cavity 12, and a small air pump 14 with its output end connected to the air heating pipe 13 is installed at the end of each set of air heating pipes 13 inside the cavity 12. The small air pump 14 is electrically connected to the second temperature sensor through a single-chip microcomputer. A pressure valve 15 is provided on the outer wall of the air heating pipe 13.

[0042] Please see Figure 5 By using a winding method to transfer heat energy, heat energy can be transferred efficiently, thereby maximizing the utilization of waste heat.

[0043] Specifically, the recycling bin 5 has a water tank 6 installed inside. The water tank 6 has a first temperature sensor and a water level sensor installed inside to control the water inlet and outlet of the water tank 6. The outer wall of the water tank 6 has a water outlet pipe that connects to the bathing equipment. The upper part of the water tank 6 is wound with a first winding pipe 7 that connects to the air pipe 3, while the lower part of the water tank 6 is wound with a second winding pipe 8 that connects to the oil pipe 4.

[0044] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 The second preheating box 16 can reuse the heat energy of the oil to preheat the water in the preheating box.

[0045] Specifically, a second preheating box 16 is installed inside the recycling box 5, below the water tank 6. The wall of the second preheating box 16 is connected to a water pipe that is connected to an external cold water source via an electrically controlled valve. The top wall of the second preheating box 16 is connected to a water pipe that is connected to the water tank 6 via an electrically controlled valve through a water pump. A box body 18 is positioned above the second preheating box 16 and below the water tank 6. An inlet 17 is located at the top of the box body 18, connected to the end of the second winding tube 8. An outlet 19 for oil flow is located at the bottom of the box body 18. A drive chamber 20 for oil flow is located inside the box body 18. A rotating shaft 21 is installed at the center of the inside of the box body 18. The outer wall of the rotating shaft 21... Multiple sets of annularly distributed turbine blades 22 are installed. An oil inlet pipe 23 communicating with the outlet 19 is provided between the housing 18 and the second preheating box 16. The end of the rotating shaft 21 is synchronously connected to a connecting shaft 24 extending into the interior of the second preheating box 16. Multiple sets of spaced oil heating pipes 25 are provided at the bottom of the oil inlet pipe 23, and each set of oil heating pipes 25 is connected to the interior of the oil inlet pipe 23. An oil outlet pipe 26 is provided below the second preheating box 16, and the end of each set of oil heating pipes 25 is connected to the interior of the oil outlet pipe 26. The bottom of the oil outlet pipe 26 is connected to an oil outlet pipe 27, and the end of the oil outlet pipe 27 is connected to an oil cooler, which is connected to the cooling system of the air compressor.

[0046] Please see Figure 7-8 In this example, the rotation of the turbine fan blade 22 drives the drive gear 29, which in turn drives the other multiple driven gears 30 to rotate, thereby achieving the purpose of controlling the oil heating tube 25.

[0047] Specifically, the oil inlet pipe 23 has a mixing chamber 28 inside, and a drive gear 29 is installed at the center of the mixing chamber 28. The top of the drive gear 29 is fixedly connected to the bottom of the connecting shaft 24 to drive the drive gear 29. Multiple driven gears 30 mesh on both sides of the drive gear 29. Each set of driven gears 30 is synchronously connected to the oil heating pipe 25. The outer wall of the oil heating pipe 25 is provided with annularly distributed stirring blades 31. The oil heating pipe 25 has a central plate 32 inside, and multiple sets of annularly distributed connecting skeletons 33 are fixed to the outer wall of the central plate 32. Each set of connecting skeletons 33 extends to the inner wall of the oil heating pipe 25. An opening is formed between every two sets of connecting skeletons 33 to allow oil to enter the oil heating pipe 25. The top opening of the oil heating pipe 25 is dynamically sealed to the bottom wall of the oil inlet pipe 23 and the top wall of the oil outlet pipe 26.

[0048] The working principle of this invention is as follows: First, the gas and oil carrying heat energy enter the oil-gas separator 2 through the high-temperature oil-gas mixing pipe 1, so that the oil and gas are separated and enter the oil pipe 4 and the gas pipe 3 respectively. Then, the first winding pipe 7 and the second winding pipe 8 are respectively introduced. The high-temperature gas and high-temperature oil flowing through the winding pipe will transfer heat to the water tank 6 and the water in the water tank through heat transfer, thereby achieving the heating effect of the water in the water tank.

[0049] Once the water in water tank 6 reaches the required temperature, the first temperature sensor will activate the electronic control valve via a microcontroller. At this time, the water in water tank 6 will flow out to the water storage tank of the bathing equipment to supply the mine workers with bathing. When the water in water tank 6 is lower than a certain height, the outlet electronic control valve will close and simultaneously activate the outlet electronic control valves of the first preheating tank 9 and the second preheating tank 16. At this time, the water in the preheating tank will enter water tank 6 to replenish the water until the set water level is reached. Since the water entering water tank 6 is preheated, the water in water tank 6 can be heated faster, achieving efficient and high-quality heating of the water, which can solve the problem of large water consumption during concentrated periods.

[0050] Furthermore, after the gas flows out of the first winding tube 7, it enters the outlet pipe 10 and heats the air in the cavity 12 inside the hollow sleeve 11 as it flows through the first preheating box 9. When the temperature in the cavity 12 reaches the target, the small air pump 14 starts, extracting the hot air from the cavity 12 and delivering it to the gas heating pipe 13. The gas heating pipe 13 then efficiently heats the water in the first preheating box 9 over a large area, improving heating efficiency and quality. At the same time, the air in the first preheating box 9 enters the cavity 12 again through the air inlet valve. The water is heated, and the small air pump 14 continuously supplies hot air to the air heating tube 13. When the air pressure in the air heating tube 13 is greater than the threshold of the pressure valve, the gas will be sprayed out from the pressure valve into the water. At this time, under the jet force of the gas, the air heating tube 13 will be rotated by the reaction force of the water, which will stir the water in the first preheating box 9, further improving the preheating quality and efficiency of the water, that is, further improving the heating efficiency and quality of the water tank. The gas finally flows to the air cooler through the air outlet pipe 10 and is eventually delivered to the user end for use.

[0051] Similarly, after the oil flows out of the second winding tube 8, it will enter the housing 18 through the feed port 17 and flow into the drive chamber 20 to drive the turbine fan blade 22 to rotate. Finally, it will flow out from the discharge port 19. The flowing oil will enter the oil inlet pipe 23. Through the dispersion effect of the oil inlet pipe 23, the oil will flow into multiple sets of oil heating pipes 25. The oil heating pipes 25 will use the heat transfer effect to heat the water in the second preheating box 16. Then, the oil in all the oil heating pipes 25 will be collected in the oil outlet pipe 26 and flow out through the oil outlet pipe 27 to the oil cooler, and finally flow back to the cooling system of the air compressor.

[0052] Furthermore, after the turbine fan blade 22 rotates, it will drive the connecting shaft 24 to rotate, which in turn will drive the center plate 32 to rotate. The center plate 32 will then drive the oil heating pipe 25 to rotate through the action of multiple sets of connecting frames 33, so that the oil heating pipe 25 can drive the stirring blade 31 to rotate, thereby achieving the stirring effect on the water in the second preheating box 16, improving the heating efficiency and quality of the water in the second preheating box 16, that is, further improving the heating quality and efficiency of the water tank.

[0053] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An air compressor oil-gas dual recovery device, comprising an air compressor and a high-temperature oil-gas mixing pipe (1) installed inside the air compressor, characterized in that: An oil-gas separator (2) is installed at the end of the high-temperature oil-gas mixing pipe (1) to separate oil and gas. Two sets of output ports are opened on the other side of the oil-gas separator (2). One set of output ports is connected to a gas pipe (3) to transport gas, while the other set of output ports is connected to an oil pipe (4) to transport oil. A recovery box (5) is installed on one side of the oil-gas separator (2), and a water tank (6) is installed inside the recovery box (5). A first temperature sensor and a water level sensor for controlling the water inlet and outlet of the water tank (6) are installed inside the water tank (6). An outlet pipe connected to the bathing equipment is opened on the outer wall of the water tank (6). A first winding pipe (7) connected to the gas pipe (3) is wound around the upper part of the water tank (6), while a second winding pipe (8) connected to the oil pipe (4) is wound around the lower part of the water tank (6). The first preheating box (9) is installed inside the recycling box (5) above the water tank (6). The outer wall of the first preheating box (9) is connected to a water pipe that is connected to an external cold water source through an electric control valve. The bottom wall of the first preheating box (9) is connected to a water pipe that is connected to the water tank (6) through an electric control valve. An air outlet pipe (10) that is connected to the first winding pipe (7) is installed inside the first preheating box (9). An air cooler is connected to the end of the air outlet pipe (10). The output end of the air cooler is connected to the user end through an air pipe. The second preheating box (16) is installed inside the recycling box (5) below the water tank (6). A box body (18) is set between the second preheating box (16) above the water tank (6) and below the water tank (6) to realize the utilization of oil kinetic energy. The wall of the second preheating box (16) is connected to a water pipe that is connected to an external cold water source through an electric control valve, and the top wall of the second preheating box (16) is connected to a water tank (6) through an electric control valve via a water pump. The top of the box body (18) is provided with a feed inlet (17), and the feed inlet (17) is connected to the end of the second winding tube (8). The bottom of the box body (18) is provided with a discharge outlet (19) for oil to flow out, and the inside of the box body (18) is provided with a drive chamber (20) for oil to flow. A rotating shaft (21) is installed at the center of the inside of the box body (18), and multiple sets of annularly distributed turbine blades (22) are installed on the outer wall of the rotating shaft (21). An oil inlet pipe (23) communicating with the outlet (19) is provided between the box body (18) and the second preheating box (16), and the end of the rotating shaft (21) is synchronously connected to a connecting shaft (24) extending into the interior of the second preheating box (16). Multiple sets of oil heating pipes (25) with spacing are provided at the bottom of the oil inlet pipe (23), and each set of oil heating pipes (25) is connected to the interior of the oil inlet pipe (23). An oil outlet pipe (26) is provided below the second preheating box (16), and the end of each set of oil heating pipes (25) is connected to the interior of the oil outlet pipe (26). The oil inlet pipe (23) has a mixing chamber (28) inside, and a drive gear (29) is installed at the center of the mixing chamber (28). The top of the drive gear (29) is fixedly connected to the bottom of the connecting shaft (24) to drive the drive gear (29). Multiple driven gears (30) mesh on both sides of the drive gear (29). Each set of driven gears (30) is synchronously connected to the oil heating pipe (25), and the outer wall of the oil heating pipe (25) is provided with annularly distributed stirring blades (31).

2. The air compressor oil-gas dual recovery device according to claim 1, characterized in that: The outer wall of the air outlet pipe (10) is slidably sleeved with a hollow sleeve (11), and the hollow sleeve (11) and the outer wall of the air outlet pipe (10) are vertically connected. The hollow sleeve (11) has a cavity (12) with an air inlet valve at the top, so as to heat the air in the cavity (12) through the heat energy of the air outlet pipe (10). The outer wall of the hollow sleeve (11) is provided with multiple sets of annularly distributed and vertically spaced air heating pipes (13), and the ends of the air heating pipes (13) are connected to the inside of the cavity (12). The inside of the cavity (12) is equipped with a second temperature sensor, and the inside of the cavity (12) is equipped with a small air pump (14) whose output end is connected to the air heating pipe (13) at the end of each set of air heating pipes (13). The small air pump (14) is electrically connected to the second temperature sensor through a single-chip microcomputer. The outer wall of the air heating pipe (13) is provided with a pressure valve (15).

3. The air compressor oil-gas dual recovery device according to claim 2, characterized in that: The bottom end of the oil outlet pipe (26) is connected to an oil outlet pipe (27), and the end of the oil outlet pipe (27) is connected to an oil cooler, which is connected to the cooling system of the air compressor.

4. The air compressor oil-gas dual recovery device according to claim 3, characterized in that: The oil heating tube (25) is provided with a central plate (32) inside, and multiple sets of annularly distributed connecting skeletons (33) are fixed on the outer wall of the central plate (32). Each set of connecting skeletons (33) extends to the inner wall of the oil heating tube (25), and an opening is formed between each two sets of connecting skeletons (33) to allow oil to enter the oil heating tube (25). The top opening of the oil heating tube (25) is dynamically sealed to the bottom wall of the oil inlet pipe (23) and the top wall of the oil outlet pipe (26).

5. A method for dual oil and gas recovery in air compressors, characterized in that... The process of using the air compressor oil-gas dual recovery device according to any one of claims 1-4 includes the following steps; S1. First, the gas heat energy and oil heat energy generated during the operation of the air compressor will be separated by the oil-gas separator, so that the gas and oil flow separately. S2. Subsequently, the gaseous thermal energy will heat the water tank through heat transfer. Similarly, the thermal energy of the oil will also heat the water tank through heat transfer. S3. After the heat energy of the gas and oil is utilized once, a preheating water tank is set up on the path of the gas and oil to make secondary use of the heat energy of the gas and oil, so that the water to be added to the water tank can be preheated before being added. S4. Finally, the gas will flow to the user end through the air cooler, while the oil will flow back to the air compressor's cooling system through the oil cooler.

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