Energy-saving and environmental-friendly air compressor with heat recovery function

Abstract

The present application discloses an energy-saving and environmental-friendly air compressor with a heat recovery function, belonging to the field of air compressors. It includes an air compressor body, in which a rotor rotates. An air inlet pipe and an air outlet pipe are respectively arranged at both ends of the air compressor. One end of the air compressor is fixedly connected to an electric motor, and the rotor is fixedly connected to the electric motor. The air outlet pipe is communicated with an oil-gas separation device, the oil-gas separation device is communicated with a heat recovery device, and one end of the heat recovery device far away from the oil-gas separation device is connected to an air storage tank. The present application has the effect of recovering and utilizing the heat generated by the air compressor and saving energy.

Description

Technical Field

[0001] This application relates to the technical field of air compressors, and in particular to an energy-saving and environmental protection type air compressor with a heat recovery function. Background Art

[0002] Air compressors are basic products for industrial modernization. The so-called electricity and automation imply full pneumatic, and air compressors provide the air source power. They are the core equipment in the air source device of the pneumatic system and the main body of the mechanical and electrical air source device. It is a device that converts the mechanical energy of the prime mover (usually an electric motor) into gas pressure energy and is a pneumatic pressure generating device for compressed air.

[0003] During the long-term continuous operation of a screw air compressor, electrical energy is converted into mechanical energy, and mechanical energy is converted into heat energy. During the conversion of mechanical energy into heat energy, the air is strongly compressed under high pressure, causing its temperature to rise sharply. This is a common physical energy conversion phenomenon. The high-speed rotation of the mechanical screw also generates heat through friction. The high heat generated is mixed with the lubricating oil of the air compressor and discharged from the body in the form of oil, gas, and steam. This part of the heat is equivalent to 3 / 4 of the input power of the air compressor. Due to the requirements of the machine operating temperature, this heat energy is discharged into the atmosphere through the cooling system, resulting in a great waste of energy. Summary of the Invention

[0004] In order to recover and utilize the heat generated by the air compressor and save energy, this application provides an energy-saving and environmental protection type air compressor with a heat recovery function.

[0005] The energy-saving and environmental protection type air compressor with a heat recovery function provided by this application adopts the following technical solutions:

[0006] The energy-saving and environmental protection type air compressor with a heat recovery function includes an air compressor body. A rotor rotates inside the air compressor body. An air inlet pipe and an air outlet pipe are respectively arranged at both ends of the air compressor. One end of the air compressor is fixedly connected to a motor, and the rotor is fixedly connected to the motor; the air outlet pipe is communicated with an oil-gas separation device, the oil-gas separation device is communicated with a heat recovery device, and one end of the heat recovery device far away from the oil-gas separation device is connected to a gas storage tank.

[0007] By adopting the above technical solutions, the high-temperature oil-gas mixture in the air compressor first passes through the oil-gas separation device to separate the oil from the high-temperature gas. Subsequently, the high-temperature gas passes through the heat recovery device to absorb and store the heat on the gas. Finally, the cooled gas is transported to the gas storage tank for storage, thereby slowing down heat recovery and utilization, saving energy, being environmentally friendly, and sustainable.

[0008] Preferably, the oil-gas separation device is a spiral tube, and the diameter of the spiral tube gradually decreases from the end close to the air compressor to the end close to the heat recovery device.

[0009] By adopting the above technical solution, when the oil-gas mixture enters the spiral tube, it moves forward along the rotation direction of the spiral tube. Since the mass of the oil is large, under the action of centrifugal force, it moves towards the inner wall of the spiral tube and adheres to the inner wall of the spiral tube, thereby separating the oil and gas. The diameter of the spiral tube gradually decreases and the gas flow velocity inside it gradually increases, thus increasing the centrifugal force and further accelerating the oil-gas separation.

[0010] Preferably, the inner wall of the spiral tube is coated with oil-repellent paint. A plurality of oil pipelines are connected to the inner wall of the bottom of the spiral tube, and an oil storage tank is arranged beside the spiral tube. One ends of the plurality of oil pipelines far away from the spiral tube are all connected to the oil storage tank.

[0011] By adopting the above technical solution, when the oil moves towards the inner wall of the spiral tube under the action of centrifugal force and adheres to the inner wall of the spiral tube, the oil-repellent paint can reduce the possibility of the oil adhering to the inner wall of the spiral tube, enabling the oil on its inner wall to sink towards the bottom wall under the action of gravity and flow into the oil storage tank through the oil pipeline, and then be recycled.

[0012] Preferably, a wind shield is arranged above the inner wall of the spiral tube. A plurality of support rods are fixedly connected to the inner wall of the spiral tube near the oil pipeline, and the wind shield is fixedly connected to the plurality of support rods.

[0013] By adopting the above technical solution, when the oil-gas mixture flows in the spiral tube, the wind shield can reduce the flow of the gas into the oil pipeline. The support rods leave a gap between the wind shield and the inner wall of the spiral tube, enabling the oil droplets to flow into the oil pipeline.

[0014] Preferably, a water chamber is arranged inside the air compressor, water is stored in the water chamber, a water tank is installed on the air compressor, and the water tank and the water chamber are connected by a water pipe.

[0015] By adopting the above technical solution, the water stored in the water chamber can cool the air inside the air compressor, and can reduce the temperature on the rotor blades, thereby increasing the service life of the rotor.

[0016] Preferably, a plurality of heat dissipation fins are fixedly connected to the outer side wall of the air compressor.

[0017] By adopting the above technical solution, the plurality of heat dissipation fins can increase the contact area with the outside air, accelerate the dissipation of the temperature on the surface of the air compressor shell, and further increase the service life of the air compressor.

[0018] Preferably, the heat recovery device includes a heat recovery box, a cooling substance storage box and a cooling pipe. The cooling pipe is arranged in the heat recovery box, the cooling substance storage box is fixedly installed on the heat recovery box, and two ends of the cooling pipe respectively penetrate through the heat recovery box and are connected to the cooling substance storage box.

[0019] By adopting the above technical solution, when the high-temperature gas passes through the heat recovery box, the arranged cooling pipes therein can absorb the heat on the high-temperature gas into the cooling substance, so as to store the heat and transfer it for use in other places, achieving the environmental protection effect of energy conservation and emission reduction.

[0020] Preferably, the heat recovery device further includes a cooling sleeve, a cooling cavity is opened in the cooling sleeve, the cooling cavity in the cooling sleeve is sleeved on the spiral pipe, two ends of the cooling sleeve are respectively fixedly connected to two ends of the spiral pipe, an input pipe and an output pipe are respectively arranged at two ends of the cooling sleeve, both the input pipe and the output pipe communicate with the cooling cavity, and one ends of the input pipe and the output pipe far away from the cooling sleeve communicate with the cooling substance storage tank.

[0021] By adopting the above technical solution, when the oil-gas mixture is separated in the spiral pipe, a cooling medium flows in the cooling cavity and absorbs heat from the spiral pipe, so that the temperatures of the oil and gas inside drop, and the heat is collected and flows to other positions where it is needed.

[0022] Preferably, a connecting pipe is installed on the side wall of the heat recovery box, the connecting pipe communicates with the heat recovery box, the spiral pipe communicates with one end of the connecting pipe far away from the cooling box, a rubber ring is fixedly arranged in the connecting pipe, the rubber ring abuts against the side wall of the spiral pipe, a filter membrane is arranged in the connecting pipe, the port of the spiral pipe abuts against the filter membrane, and an oil pipeline is communicated with the inner wall of the connecting pipe, and the oil pipeline communicates with the oil storage tank.

[0023] By adopting the above technical solution, the gas separated by centrifugal force in the spiral pipe is filtered again by the filter membrane for the oil in the gas before entering the heat recovery box, strengthening the effect of oil-gas separation, preventing oil substances from entering the heat recovery box and adhering to the cooling pipes, and reducing the energy exchange between the cooling pipes and the gas; the filtered gas penetrates through the filter membrane and enters the heat recovery box, while the oil is blocked by the filter membrane on the filter membrane and gradually flows to the bottom under its own gravity and then flows into the oil storage tank through the oil pipeline; the rubber ring abuts against the outer side wall of the spiral pipe, reducing the gas leakage at the connection port.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The high-temperature oil-gas mixture in the air compressor first passes through the oil-gas separation device to separate the oil from the high-temperature gas. Subsequently, the high-temperature gas passes through the heat recovery device to absorb and store the heat on the gas. Finally, the cooled gas is transported to the gas storage tank for storage, thereby slowing down the heat recovery and utilization, saving energy, being environmentally friendly and sustainable;

[0026] 2. After the oil-gas mixture enters the spiral tube, it moves forward along the rotation direction of the spiral tube. Due to the large mass of the oil, under the action of centrifugal force, it moves towards the inner wall of the spiral tube and adheres to the inner wall of the spiral tube, thereby separating the oil and gas. The diameter of the spiral tube gradually decreases and the internal gas flow velocity gradually increases, so that the centrifugal force increases, and further accelerates the oil-gas separation;

[0027] 3. The gas separated by centrifugal force in the spiral tube is filtered again by the filter membrane before entering the heat recovery box to remove the oil in the gas, strengthening the effect of oil-gas separation, preventing oil substances from entering the heat recovery box and adhering to the cooling tube, and reducing the energy exchange between the cooling tube and the gas; The filtered gas penetrates the filter membrane and enters the heat recovery box, while the oil is blocked by the filter membrane onto the filter membrane and gradually flows to the bottom under its own gravity and flows into the storage oil tank through the oil delivery pipe; The rubber ring abuts against the outer wall of the spiral tube to reduce gas leakage at the connection port. Brief Description of the Drawings

[0028] Figure 1 It is a schematic diagram of the overall structure of an energy-saving and environment-friendly air compressor with a heat recovery function.

[0029] Figure 2 It is a schematic cross-sectional structure diagram of the air compressor in the embodiment of the present application.

[0030] Figure 3 It is a schematic cross-sectional structure diagram of the cooling pipe and the spiral tube in the embodiment of the present application.

[0031] Figure 4 It is a schematic cross-sectional structure diagram of the heat recovery box in the embodiment of the present application.

[0032] Description of the Reference Numerals:

[0033] 1. Air compressor body; 2. Rotor; 3. Intake pipe; 4. Exhaust pipe; 5. Motor; 6. Oil-gas separation device; 7. Heat recovery device; 8. Air storage tank; 9. Spiral tube; 10. Oil-repellent coating; 11. Oil delivery pipe; 12. Storage oil tank; 13. Wind baffle; 14. Support rod; 15. Water cavity; 16. Water tank; 17. Heat dissipation fins; 18. Heat recovery box; 19. Cooling substance storage box; 20. Cooling tube; 21. Cooling sleeve; 22. Cooling cavity; 23. Input pipe; 24. Output pipe; 25. Connecting pipe; 26. Rubber ring; 27. Filter membrane. Detailed Description of the Embodiment

[0034] The following is a further detailed description of the present application in conjunction with the attached Figures 1-4 drawings.

[0035] The embodiment of the present application discloses an energy-saving and environment-friendly air compressor with a heat recovery function, as shown in Figure 1 and Figure 2As shown in the figure, it includes an air compressor body 1. One end of the air compressor body 1 is fixedly welded with a motor 5. A rotor 2 rotates inside the air compressor body 1. The rotating shaft of the rotor 2 is welded to the rotating shaft of the motor 5. The motor 5 drives the rotor 2 to rotate. An air inlet pipe 3 and an air outlet pipe 4 are respectively arranged at both ends of the air compressor. Air is inhaled from the air inlet pipe 3 and discharged from the air outlet pipe 4 after being compressed by the air compressor. The air outlet pipe 4 is communicated with an oil-gas separation device 6. One end of the oil-gas separation device 6 far away from the air compressor body 1 is connected with a heat recovery device 7. The heat recovery device 7 can absorb and store the heat in the high-temperature gas inside the air compressor. One end of the heat recovery device 7 far away from the oil-gas separation device 6 is connected with an air storage tank 8. The heat recovery device 7 can cool the high-temperature gas generated by the air compressor, and at the same time absorb and store the heat in the high-temperature gas, thereby slowing down the heat recovery and utilization, saving energy, being environmentally friendly and sustainable in development.

[0036] As Figure 2 shown, a water cavity 15 is arranged on the inner wall of the air compressor body 1 close to the motor 5. The water cavity 15 is arranged in a circle along the inner wall of the air flow channel in the air compressor body 1, which can make the gas in the air compressor body 1 contact with the wall of the water cavity 15. Cooling water is stored in the water cavity 15. A water tank 16 is fixedly installed on the outer wall of the air compressor. The water tank 16 and the water cavity 15 are communicated through a water pipe. External low-temperature water can be sent into the water cavity 15 to absorb heat from the air flowing inside the air compressor, so that the temperature of the gas in the inner cavity of the air compressor body 1 drops, thereby reducing the loss of the high temperature to the blades of the rotor 2 and improving the service life of the rotor 2. A plurality of heat dissipation fins 17 are fixedly welded on the outer wall of the air compressor. The plurality of fins are arranged around the circumferential side wall of the air compressor body 1. The plurality of heat dissipation fins 17 can increase the contact area with the outside air, accelerate the dissipation of the surface temperature of the air compressor shell, and further improve the service life of the air compressor.

[0037] As Figure 1 and Figure 3 shown, the oil-gas separation device 6 is a spiral pipe 9. The spiral pipe 9 is spirally arranged. The two ends of the spiral pipe 9 are respectively connected to the air outlet pipe 4 of the air compressor body 1 and the heat recovery device 7. And the diameter of the spiral pipe 9 gradually decreases from the end close to the air compressor to the end close to the heat recovery device 7, so that the flow rate of the gas flowing inside increases, and the centrifugal force of the air flow is enhanced. An oil-repellent coating 10 is coated on the inner wall of the spiral pipe 9. A plurality of oil pipes 11 are connected to the bottom of the spiral pipe 9. The oil pipes 11 are communicated with the inner wall of the lowest end of each arc of the spiral pipe 9. An oil storage tank 12 is arranged beside the spiral pipe 9. The plurality of oil pipes 11 are all communicated with the oil storage tank 12. Another support rod 14 is fixedly welded on the inner wall of the lowest end of the spiral pipe 9. The support rod 14 is in a cylindrical shape, and its axis is arranged in the vertical direction. The windshield 13 is in a cuboid shape and is inclined. One side of it is fixedly welded to the inside of the bottom of the spiral pipe 9, and the two sides of the other end are respectively fixedly welded to the tops of the two support rods 14. The windshield 13 covers the oil pipes 11.

[0038] As Figure 1 and Figure 3 shown, the heat recovery device 7 includes a cooling sleeve 21. The cooling sleeve 21 is spiral and sleeved outside the spiral tube 9. The spiral tube 9 is sleeved inside the cooling sleeve 21. The two ends of the cooling sleeve 21 are respectively fixedly connected to the outer side walls at both ends of the spiral tube 9 and are hermetically connected. A cooling chamber 22 is formed between the inner wall of the cooling sleeve 21 and the outer side wall of the spiral tube 9. A cooling medium flows in the cooling chamber 22. The two ends of the cooling sleeve 21 are respectively communicated with an input pipe 23 and an output pipe 24 for inputting and outputting the cooling medium. When the high-temperature oil-gas mixture enters the spiral tube 9, it moves forward along the rotation direction of the spiral tube 9. The cooling medium in the cooling sleeve 21 adheres to the outer side wall of the spiral tube 9 to absorb the heat of the high-temperature gas in the spiral tube 9. At the same time, when the gas flows in the spiral tube 9, it spirally advances along the channel of the spiral tube 9, thereby generating a centrifugal force. The mass of the oil is relatively large. Under the action of the centrifugal force, the oil substance in the mixed gas is thrown outwards and adheres to the inner wall of the spiral tube 9, so that the oil and gas are separated. The oil-repellent coating 10 is applied to the inner wall of the spiral tube 9, which reduces the possibility of oil substances adhering and accumulating on the inner wall of the spiral tube 9, so that the oil on its inner wall sinks towards the bottom wall under the action of gravity, and finally flows to the position of the oil pipeline 11 at the lowest end, and flows into the storage oil tank 12 through the oil pipeline 11 and is recycled and reused. When the oil-gas mixed gas flows in the spiral tube 9, one end of the wind baffle 13 is connected to the inner wall of the spiral tube 9 and is gradually inclined upwards, which is beneficial to blocking the airflow from flowing into the oil pipeline 11. Under the action of the support rod 14, there is a gap between the wind baffle 13 and the inner wall of the spiral tube 9, which enables the oil droplets to flow into the oil pipeline 11.

[0039] As Figure 4As shown, the heat recovery device 7 further includes a heat recovery box 18, a cooling substance storage box 19, and a cooling pipe 20. The cooling pipe 20 is arranged in an S shape inside the heat recovery box 18. The cooling substance storage box 19 is fixedly installed on the upper end face of the heat recovery box 18. Both the input pipe 23 and the output pipe 24 on the cooling pipe 20 communicate with the inside of the cooling substance storage box 19. Both ends of the cooling pipe 20 penetrate through the heat recovery box 18 and communicate with the cooling substance storage box 19. The cooling medium in the cooling substance storage box 19 can be water, liquid metal, refrigerant, etc. The cooling substance storage box 19 is connected to other devices, such as a floor heating system, a water heater, etc., so that the heat can be used reasonably and effectively. A connecting pipe 25 is installed on the side wall of the heat recovery box 18. The connecting pipe 25 is arranged horizontally. The two ends of the connecting pipe 25 are fixedly communicated with the inner cavity of the heat recovery box 18. The spiral pipe 9 communicates with the left port of the connecting pipe 25. A filter membrane is arranged inside the connecting pipe 25. The bottom inner wall of the connecting pipe 25 at the front end of the filter membrane is slightly concave. An oil delivery pipe 11 communicates with the concave part at the bottom of the connecting pipe 25. The oil delivery pipe 11 penetrates through the connecting pipe 25 and communicates with the oil storage tank 12. A rubber pad is fixedly adhered to the inner wall of the connecting pipe 25. The rubber pad abuts against the outer side wall of the spiral pipe 9, thereby reducing gas leakage at the connection between the connecting pipe 25 and the spiral pipe 9.

[0040] As Figure 3 and Figure 4 shown, the gas separated by centrifugal force in the spiral pipe 9 is filtered again by the filter membrane to remove the oil substances in the gas. The filtered gas penetrates through the filter membrane and enters the heat recovery box 18, while the oil is blocked by the filter membrane onto the filter membrane and gradually flows to the bottom under its own gravity and then flows into the oil storage tank 12 through the oil delivery pipe 11. When the remaining gas passes through the heat recovery box 18, the arranged cooling pipes 20 inside can absorb the heat on the high-temperature gas into the cooling medium, thereby storing the heat for use in other places and achieving the environmental protection effect of energy conservation and emission reduction.

[0041] The implementation principle of the embodiment of this application is as follows: The high-temperature oil-gas mixture in the air compressor first passes through the oil-gas separation device 6 to separate the oil from the high-temperature gas. Subsequently, the high-temperature gas passes through the heat recovery device 7 to absorb and store the heat on the gas. Finally, the cooled gas is transported to the gas storage tank 8 for storage, thereby slowing down the heat recovery and utilization, saving energy, being environmentally friendly, and achieving sustainable development.

[0042] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An energy-saving and environmental protection air compressor with heat recovery function, comprising an air compressor body (1), a rotor (2) rotates in the air compressor body (1), an air inlet pipe (3) and an air outlet pipe (4) are respectively arranged at both ends of the air compressor, one end of the air compressor is fixedly connected with a motor (5), and the rotor (2) is fixedly connected to the motor (5); It is characterized in that: The outlet pipe (4) is connected to an oil-gas separation device (6), the oil-gas separation device (6) is connected to a heat recovery device (7), and one end of the heat recovery device (7) far from the oil-gas separation device (6) is connected to a gas storage tank (8); The oil-gas separation device (6) is a spiral pipe (9), and the diameter of the spiral pipe (9) gradually decreases from the end close to the air compressor to the end close to the heat recovery device (7); The heat recovery device (7) includes a heat recovery box (18), a cooling substance storage box (19) and a cooling pipe (20). The cooling pipe (20) is arranged in the heat recovery box (18), the cooling substance storage box (19) is fixedly installed on the heat recovery box (18), and both ends of the cooling pipe (20) respectively penetrate through the heat recovery box (18) and are connected to the cooling substance storage box (19); The heat recovery device (7) further includes a cooling sleeve (21). A cooling cavity (22) is opened in the cooling sleeve (21). The cooling cavity (22) in the cooling sleeve (21) sleeves the spiral pipe (9). Both ends of the cooling sleeve (21) are respectively fixedly connected to both ends of the spiral pipe (9). An input pipe (23) and an output pipe (24) are respectively arranged at both ends of the cooling sleeve (21). The input pipe (23) and the output pipe (24) are both connected to the cooling cavity (22). One ends of the input pipe (23) and the output pipe (24) far from the cooling sleeve (21) are connected to the cooling substance storage box (19).

2. The energy-saving and environmental-friendly air compressor with heat recovery function according to claim 1, characterized in that: An oil-repellent coating (10) is applied to the inner wall of the spiral pipe (9). A plurality of oil pipes (11) are connected to the bottom inner wall of the spiral pipe (9). An oil storage tank (12) is arranged beside the spiral pipe (9). One ends of the plurality of oil pipes (11) far from the spiral pipe (9) are all connected to the oil storage tank (12).

3. The energy-saving and environmental protection air compressor with heat recovery function according to claim 2, wherein: A wind baffle (13) is arranged above the inner wall of the spiral pipe (9). A plurality of support rods (14) are fixedly connected to the inner wall of the spiral pipe (9) near the oil pipes (11). The wind baffle (13) is fixedly connected to the plurality of support rods (14).

4. The energy-saving and environmental-friendly air compressor with heat recovery function according to claim 1, characterized in that: A water cavity (15) is arranged in the air compressor, water is stored in the water cavity (15), the air compressor is equipped with a water tank (16), and the water tank (16) and the water cavity (15) are connected by a water pipe.

5. The energy-saving and environmental-friendly air compressor with heat recovery function according to claim 1, characterized in that: A plurality of heat dissipation fins (17) are fixedly connected to the outer side wall of the air compressor.

6. The energy-saving and environmental-friendly air compressor with heat recovery function according to claim 2, characterized in that: A connecting pipe (25) is installed on the side wall of the heat recovery box (18). The connecting pipe (25) is connected to the heat recovery box (18). The spiral pipe (9) is connected to one end of the connecting pipe (25) far from the cooling box. A rubber ring (26) is fixedly arranged in the connecting pipe (25). The rubber ring (26) abuts against the side wall of the spiral pipe (9). A filter membrane is arranged in the connecting pipe (25). The port of the spiral pipe (9) abuts against the filter membrane. An oil pipe (11) is connected to the inner wall of the connecting pipe (25). The oil pipe (11) is connected to the oil storage tank (12).

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