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

Abstract

The invention discloses an energy-saving and environment-friendly air compressor with a heat recovery function, and belongs to the field of air compressors, the energy-saving and environment-friendly air compressor comprises an air compressor body, a rotor is rotationally arranged in the air compressor body, an air inlet pipe and an air outlet pipe are arranged at the two ends of the air compressor respectively, a motor is fixedly connected to one end of the air compressor, and the rotor is fixedly connected to the motor; the gas 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, far away from the oil-gas separation device, of the heat recovery device is connected with a gas storage tank. The device has the effects that heat generated by the air compressor is recycled, and energy is saved.

Description

Technical Field

[0001] The present application relates to the technical field of air compressors, and in particular to an energy-saving and environment-friendly air compressor with a heat recovery function. Background Art

[0002] Air compressors are basic products of industrial modernization. The commonly mentioned electrical and automation have the meaning of full pneumatics, and air compressors provide air source power. They are the core equipment of the pneumatic system and the main body of the electromechanical air source device. They are devices that convert the mechanical energy of the prime mover (usually an electric motor) into gas pressure energy. They are air pressure generating devices for compressed air.

[0003] During the long-term continuous operation of the screw air compressor, electrical energy is converted into mechanical energy, and mechanical energy is converted into thermal energy. In the process of converting mechanical energy into thermal energy, the air is strongly compressed at high pressure, causing its temperature to rise sharply. This is a common energy conversion phenomenon in physics. The high-speed rotation of the mechanical screw also generates friction and heat. The high heat generated is mixed into oil, gas, and steam by the addition of air compressor lubricating oil and discharged from the body. This part of heat is equivalent to 3 / 4 of the air compressor input power. Due to the requirements of the machine's operating temperature, these heat energies are discharged into the atmosphere through the heat dissipation system, which causes a huge waste of energy. Summary of the invention

[0004] In order to recycle the heat generated by the air compressor and save energy, the present application provides an energy-saving and environmentally friendly air compressor with a heat recovery function.

[0005] The energy-saving and environmentally friendly air compressor with heat recovery function provided in this application adopts the following technical solutions: The energy-saving and environment-friendly air compressor with heat recovery function comprises an air compressor body, a rotor rotating inside the air compressor body, an air inlet pipe and an air outlet pipe respectively arranged at two 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 connected to an oil-gas separation device, the oil-gas separation device is connected to a heat recovery device, and the end of the heat recovery device away from the oil-gas separation device is connected to an air storage tank.

[0006] By adopting the above technical solution, the high-temperature oil and gas mixture in the air compressor first passes through the oil-gas separation device to separate the oil from the high-temperature gas, and then the high-temperature gas passes through the heat recovery device to absorb and store the heat on the gas, and finally the cooled gas is transported to the gas storage tank for storage, thereby slowing down the heat recovery and utilization, saving energy, being green and environmentally friendly, and achieving sustainable development.

[0007] Preferably, the oil-gas separation device is a spiral tube, and the diameter of the spiral tube gradually decreases from an end close to the air compressor to an end close to the heat recovery device.

[0008] By adopting the above technical solution, when the oil-gas mixture enters the spiral tube and moves forward along the rotation direction of the spiral tube, the oil has a large mass and moves toward the inner wall of the spiral tube under the action of centrifugal force 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 speed inside it gradually increases, thereby increasing the centrifugal force and accelerating the oil and gas separation.

[0009] Preferably, the inner wall of the spiral tube is coated with oleophobic paint, a plurality of oil pipes are connected to the inner wall of the bottom of the spiral tube, an oil storage tank is arranged next to the spiral tube, and the ends of the plurality of oil pipes away from the spiral tube are all connected to the oil storage tank.

[0010] By adopting the above technical scheme, when the oil moves toward the inner wall of the spiral tube and adheres to the inner wall of the spiral tube under the action of centrifugation, the oleophobic coating can reduce the possibility of oil adhering to the inner wall of the spiral tube, so that the oil on the inner wall settles to the bottom wall under the action of gravity, and flows into the oil storage tank through the oil pipeline, and is recycled and reused.

[0011] Preferably, a windshield is provided above the inner wall of the spiral tube, the inner wall of the spiral tube is located near the oil pipeline and is fixedly connected to a plurality of support rods, and the windshield is fixedly connected to the plurality of support rods.

[0012] By adopting the above technical solution, when the oil-gas mixture flows in the spiral tube, the wind shield can reduce the gas flow into the oil pipeline. The support rod leaves a gap between the wind shield and the inner wall of the spiral tube, allowing oil drops to flow into the oil pipeline.

[0013] Preferably, a water cavity is provided in the air compressor, water is stored in the water cavity, and the air compressor is equipped with a water tank, and the water tank and the water cavity are connected by a water pipe.

[0014] By adopting the above technical solution, the water stored in the water cavity can cool the air inside the air compressor, thereby reducing the temperature on the rotor blades and increasing the service life of the rotor.

[0015] Preferably, a plurality of heat dissipation fins are fixedly connected to the outer side wall of the air compressor.

[0016] By adopting the above technical solution, multiple heat dissipation fins can increase the contact area with the outside air, accelerate the dissipation of the surface temperature of the air compressor shell, and thus increase the service life of the air compressor.

[0017] Preferably, the heat recovery device includes a heat recovery box, a cooling material storage box and a cooling pipe, the cooling pipe is arranged in the heat recovery box, the cooling material storage box is fixedly installed on the heat recovery box, and both ends of the cooling pipe are respectively passed through the heat recovery box and connected to the cooling material storage box.

[0018] By adopting the above technical solution, when the high-temperature gas passes through the heat recovery box, the cooling pipes arranged therein can absorb the heat from the high-temperature gas into the cooling material, thereby storing the heat and transferring it to other places, achieving the environmental protection effect of energy saving and emission reduction.

[0019] Preferably, the heat recovery device also includes a cooling jacket, a cooling cavity is opened in the cooling jacket, the cooling cavity in the cooling jacket is sleeved on the spiral tube, the two ends of the cooling jacket are respectively fixedly connected to the two ends of the spiral tube, the two ends of the cooling jacket are respectively provided with an input pipe and the output pipe, the input pipe and the output pipe are both connected to the cooling cavity, and the input pipe and the output pipe are connected to the cooling material storage tank at one end away from the cooling jacket.

[0020] By adopting the above technical solution, when the oil-gas mixture is separated in the spiral tube, a cooling medium flows in the cooling cavity and absorbs heat from the spiral tube, so that the temperature of the oil and gas inside it drops, and the heat is collected and flows to other required locations.

[0021] Preferably, a connecting pipe is installed on the side wall of the heat recovery box, the connecting pipe is connected to the heat recovery box, the spiral pipe is connected to the end of the connecting pipe away from the cooling box, a rubber ring is fixedly arranged in the connecting pipe, the rubber ring is tightly pressed against the side wall of the spiral pipe, a filter membrane is arranged in the connecting pipe, the spiral pipe port is pressed against the filter membrane, the inner wall of the connecting pipe is connected to an oil pipe, and the oil pipe is connected to the oil storage tank.

[0022] By adopting the above technical scheme, the gas after centrifugal separation in the spiral tube first passes through the filter membrane to filter the oil in the gas again before entering the heat recovery box, thereby enhancing the effect of oil and gas separation, preventing oil from entering the heat recovery box and adhering to the cooling pipe, and reducing the energy exchange between the cooling pipe 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 to the filter membrane, and gradually flows to the bottom under its own gravity through the oil pipe into the oil storage tank; the rubber ring abuts against the outer wall of the spiral tube to reduce gas leakage at the connection port.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 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. Then 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 green and environmentally friendly, and achieving sustainable development. 2. When the oil-gas mixture enters the spiral tube and moves forward along the spiral tube's rotation direction, the oil has a large mass and moves toward the inner wall of the spiral tube under the action of centrifugal force 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 flow speed of the gas inside it gradually increases, thereby increasing the centrifugal force and accelerating the separation of oil and gas. 3. The gas after centrifugal separation in the spiral tube passes through the filter membrane to filter the oil in the gas again before entering the heat recovery box, which enhances the effect of oil-gas separation and prevents the oil from entering the heat recovery box and adhering to the cooling pipe, thereby reducing the energy exchange between the cooling pipe 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 to the filter membrane, and gradually flows to the bottom under its own gravity through the oil pipe into the oil storage tank; 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

[0024] Figure 1 It is a schematic diagram of the overall structure of an energy-saving and environment-friendly air compressor with heat recovery function.

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the air compressor in the embodiment of the present application.

[0026] Figure 3 It is a schematic diagram of the cross-sectional structure of the cooling pipe and the spiral tube in the embodiment of the present application.

[0027] Figure 4 It is a schematic diagram of the cross-sectional structure of the heat recovery box in the embodiment of the present application.

[0028] Description of reference numerals: 1. Air compressor body; 2. Rotor; 3. Inlet pipe; 4. Outlet pipe; 5. Motor; 6. Oil-gas separation device; 7. Heat recovery device; 8. Air storage tank; 9. Spiral tube; 10. Oleophobic coating; 11. Oil pipeline; 12. Oil storage tank; 13. Wind shield; 14. Support rod; 15. Water cavity; 16. Water tank; 17. Cooling fins; 18. Heat recovery tank; 19. Cooling material storage tank; 20. Cooling pipe; 21. Cooling sleeve; 22. Cooling cavity; 23. Input pipe; 24. Output pipe; 25. Connecting pipe; 26. Rubber ring; 27. Filter membrane. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-4 This application is described in further detail.

[0030] The present application embodiment discloses an energy-saving and environment-friendly air compressor with heat recovery function, such as Figure 1 and Figure 2As shown, it includes an air compressor body 1, one end of which is fixedly welded with a motor 5, a rotor 2 is rotated in the air compressor body 1, the rotating shaft of the rotor 2 is welded with the rotating shaft of the motor 5, and 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, and air is sucked in 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 connected to an oil-gas separation device 6, and the end of the oil-gas separation device 6 away from the air compressor body 1 is connected to a heat recovery device 7, and the heat recovery device 7 can absorb and store the heat in the high-temperature gas in the air compressor, and the end of the heat recovery device 7 away from the oil-gas separation device 6 is connected to a gas 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 green and environmentally friendly, and achieving sustainable development.

[0031] like Figure 2 As shown, a water cavity 15 is arranged on the inner wall of one side of the air compressor body 1 near the motor 5. The water cavity 15 is arranged along the inner wall of the air flow channel in the air compressor body 1, so that the gas in the air compressor body 1 can contact the wall of the water cavity 15. The water cavity 15 stores cooling water. 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 connected by a water pipe. External low-temperature water can be sent to 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 rotor 2 blades caused by high temperature 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 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 thus improve the service life of the air compressor.

[0032] like Figure 1 and Figure 3 As shown, the oil-gas separation device 6 is a spiral tube 9, which is spirally arranged. The two ends of the spiral tube 9 are respectively connected to the air outlet pipe 4 and the heat recovery device 7 of the air compressor body 1, and the diameter of the spiral tube 9 gradually decreases from the end close to the air compressor to the end close to the heat recovery device 7, so that the gas velocity flowing inside increases and the centrifugal force of the air flow is improved. The inner wall of the spiral tube 9 is painted with oleophobic paint 10, and the bottom of the spiral tube 9 is connected to a plurality of oil pipelines 11, which are connected to the inner wall of the lowest end of each arc of the spiral tube 9. An oil storage tank 12 is arranged next to the spiral tube 9, and the plurality of oil pipelines 11 are all connected to the oil storage tank 12. Another support rod 14 is fixedly welded on the inner wall of the lowest end of the spiral tube 9. The support rod 14 is cylindrical, and its axis is arranged in the vertical direction. The wind shield 13 is rectangular, and the wind shield 13 is inclined. One side of the wind shield 13 is fixedly welded to the bottom of the spiral tube 9, and the two sides of the other end are respectively fixedly welded to the top of the two support rods 14. The wind shield 13 covers the top of the oil pipeline 11.

[0033] like Figure 1 and Figure 3 As shown, the heat recovery device 7 includes a cooling sleeve 21, which is spiral-shaped and sleeved on the outside of the spiral tube 9. The spiral tube 9 is sleeved in the cooling sleeve 21. The two ends of the cooling sleeve 21 are respectively fixedly connected to the outer walls of the two ends of the spiral tube 9 and are sealed. A cooling cavity 22 is formed between the inner wall of the cooling sleeve 21 and the outer wall of the spiral tube 9. A cooling medium flows in the cooling cavity 22. The two ends of the cooling sleeve 21 are respectively connected 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 and moves forward along the rotation direction of the spiral tube 9, the cooling medium in the cooling sleeve 21 adheres to the outer 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 flows forward in a spiral manner along the channel of the spiral tube 9, thereby generating centrifugal force. The mass of the oil is large. Under the action of the centrifugal force, the oil material in the mixed gas is thrown outward and adheres to the inner wall of the spiral tube 9, thereby separating the oil and gas. The oleophobic coating 10 coated inside the spiral tube 9 reduces the possibility of oil substances adhering to and accumulating on the inner wall of the spiral tube 9, so that the oil on the inner wall settles to the bottom wall under the action of gravity, and finally flows into the oil pipeline 11 at the lowest end, and flows into the oil storage tank 12 through the oil pipeline 11, and is recycled and reused. When the oil-gas mixture flows in the spiral tube 9, one end of the windshield 13 is connected to the inner wall of the spiral tube 9 and is gradually tilted upward, which is conducive to blocking the airflow from flowing into the oil pipeline 11. Under the action of the support rod 14, a gap is left between the windshield 13 and the inner wall of the spiral tube 9, which can allow oil drops to flow into the oil pipeline 11.

[0034] like Figure 4As shown, the heat recovery device 7 also includes a heat recovery box 18, a cooling material storage box 19 and a cooling pipe 20. The cooling pipe 20 is arranged in an S shape in the heat recovery box 18. The cooling material storage box 19 is fixedly installed on the upper end surface of the heat recovery box 18. The input pipe 23 and the output pipe 24 on the cooling pipe 20 are both connected to the cooling material storage box 19; the two ends of the cooling pipe 20 are respectively passed through the heat recovery box 18 and connected to the cooling material storage box 19. The cooling medium in the cooling material storage box 19 can be water, liquid metal, refrigerant, etc. The cooling material storage box 19 is connected to other equipment, such as floor heating, 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 in a horizontal direction. The end of the connecting pipe 25 is fixedly connected to the inner cavity of the heat recovery box 18. The spiral tube 9 is connected to the left port of the connecting pipe 25. A filter membrane is arranged in the connecting pipe 25. The bottom inner wall of the connecting pipe 25 located at the front end of the filter membrane is slightly concave. The bottom concave part of the connecting pipe 25 is connected to the oil pipeline 11. The oil pipeline 11 is passed through the connecting pipe 25 and is connected to the oil storage tank 12. A circle of rubber pads is fixedly adhered to the inner wall of the connecting pipe 25, and the rubber pads are pressed against the outer wall of the spiral tube 9, thereby reducing gas leakage at the connection between the connecting pipe 25 and the spiral tube 9.

[0035] like Figure 3 and Figure 4 As shown, the gas separated by centrifugal force in the spiral tube 9 passes through the filter membrane to filter the oil in the gas again, and the filtered gas penetrates the filter membrane and enters the heat recovery box 18, while the oil is blocked by the filter membrane to the filter membrane, and gradually flows to the bottom under its own gravity through the oil pipe 11 into the oil storage tank 12. When the remaining gas passes through the heat recovery box 18, the cooling pipes 20 arranged therein can absorb the heat on the high-temperature gas into the cooling medium, thereby storing the heat and transferring it to other places for use, achieving the environmental protection effect of energy saving and emission reduction.

[0036] The implementation principle of the embodiment of the present application is: the high-temperature oil and gas mixture in the air compressor first passes through the oil-gas separation device 6 to separate the oil from the high-temperature gas, and then the high-temperature gas passes through the heat recovery device 7 to absorb and store the heat on the gas, and 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 green and environmentally friendly, and achieving sustainable development.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An energy-saving and environment-friendly air compressor with a heat recovery function, comprising an air compressor body (1), a rotor (2) rotating inside the air compressor body (1), an air inlet pipe (3) and an air outlet pipe (4) being respectively arranged at two ends of the air compressor, a motor (5) being fixedly connected to one end of the air compressor, and the rotor (2) being fixedly connected to the motor (5); characterized in that: The gas 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 the end of the heat recovery device (7) away from the oil-gas separation device (6) is connected to a gas storage tank (8).

2. The energy-saving and environment-friendly air compressor with heat recovery function according to claim 1 is characterized in that: The oil-gas separation device (6) is a spiral tube (9), and the diameter of the spiral tube (9) gradually decreases from an end close to the air compressor to an end close to the heat recovery device (7).

3. The energy-saving and environment-friendly air compressor with heat recovery function according to claim 2 is characterized in that: The inner wall of the spiral tube (9) is coated with an oleophobic coating (10); a plurality of oil delivery pipes (11) are connected to the inner wall at the bottom of the spiral tube (9); an oil storage tank (12) is arranged next to the spiral tube (9); and the ends of the plurality of oil delivery pipes (11) away from the spiral tube (9) are all connected to the oil storage tank (12).

4. The energy-saving and environment-friendly air compressor with heat recovery function according to claim 3 is characterized in that: A windshield (13) is arranged above the inner wall of the spiral tube (9), and a plurality of support rods (14) are fixedly connected to the inner wall of the spiral tube (9) near the oil delivery pipe (11), and the windshield (13) is fixedly connected to the plurality of support rods (14).

5. The energy-saving and environment-friendly air compressor with heat recovery function according to claim 1 is characterized in that: The air compressor is provided with a water chamber (15), in which water is stored. The air compressor is equipped with a water tank (16), and the water tank (16) and the water chamber (15) are connected by a water pipe.

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

7. The energy-saving and environment-friendly air compressor with heat recovery function according to claim 3 is characterized in that: The heat recovery device (7) comprises a heat recovery box (18), a cooling material storage box (19) and a cooling pipe (20); the cooling pipe (20) is arranged in the heat recovery box (18); the cooling material storage box (19) is fixedly installed on the heat recovery box (18); and both ends of the cooling pipe (20) are respectively passed through the heat recovery box (18) and connected to the cooling material storage box (19).

8. The energy-saving and environment-friendly air compressor with heat recovery function according to claim 7 is characterized in that: The heat recovery device (7) further comprises a cooling jacket (21), a cooling cavity (22) being opened in the cooling jacket (21), the cooling cavity (22) in the cooling jacket (21) being sleeved on the spiral tube (9), the two ends of the cooling jacket (21) being respectively fixedly connected to the two ends of the spiral tube (9), the two ends of the cooling jacket (21) being respectively provided with an input pipe (23) and an output pipe (24), the input pipe (23) and the output pipe (24) being both connected to the cooling cavity (22), and the ends of the input pipe (23) and the output pipe (24) being away from the cooling jacket (21) being connected to the cooling material storage tank (19).

9. The energy-saving and environment-friendly air compressor with heat recovery function according to claim 7, 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 tube (9) is connected to one end of the connecting pipe (25) away from the cooling box, a rubber ring (26) is fixedly arranged in the connecting pipe (25), the rubber ring (26) is tightly pressed against the side wall of the spiral tube (9), a filter membrane is arranged in the connecting pipe (25), the end of the spiral tube (9) is pressed against the filter membrane, the inner wall of the connecting pipe (25) is connected to an oil delivery pipe (11), and the oil delivery pipe (11) is connected to the oil storage tank (12).

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