Remaining air recycling device of air compressor
By designing the residual gas reuse device of the air compressor, the residual gas of the air compressor is introduced into the aeration pipeline to replace the Roots fan, the problems of waste air and inefficiency of the Roots fan are solved, and energy saving and production costs are achieved.
Patent Information
- Application Number
- CN202520775731.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2035-04-23
AI Technical Summary
The residual gas generated by existing centrifugal air compressors in actual operation cannot be effectively utilized, resulting in energy waste and environmental pollution. At the same time, the low efficiency and high maintenance costs of Roots blowers are also problems.
A residual gas reuse device for air compressors is designed. Through the residual gas collection tank and pressure adjustment chamber, the residual gas of the air compressor is introduced into the aeration pipeline to replace the Roots fan and use the pressure potential energy of the residual gas to replenish the air required for aeration. The device adjusts the pressure range of the gas by adjusting the fit between the spring and the movable sheet to ensure the stability of the gas pressure.
It realizes the effective reuse of residual gas of the air compressor, saves energy, reduces production costs, and reduces dependence on Roots fans, reducing noise and maintenance costs.
Smart Images
Figure CN223049854U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas conveying devices, in particular to a device for reusing the surplus gas of an air compressor. Background Art
[0002] Centrifugal air compressors are widely used in industrial production, mainly used to provide compressed air for instrument air, device air, pressure swing adsorption air, etc. in the factory area. The existing centrifugal air compressors usually adopt a three-stage compression technology, with an exhaust pressure of 8.5 bar and a designed output of 120 Nm³ / h. However, in actual operation, due to the change of gas demand in the workshop (especially after optimizing the pressure swing adsorption gas), the air compressor often generates some surplus gas. These surplus gases are usually directly discharged by the air discharge method, which not only causes energy waste, but also generates relatively large noise due to the discharge of high-pressure gases, having an adverse impact on the environment and working conditions.
[0003] At present, the intake pipeline of the aeration tank mostly introduces air through a Roots blower. However, the Roots blower itself has many disadvantages: The Roots blower belongs to a positive displacement blower, and its operating efficiency is relatively low. Especially under low-load conditions, the energy consumption loss is significant, resulting in high electricity costs during long-term operation; The mechanical transmission and air flow pulsation of the Roots blower will generate relatively large noise, polluting the working environment and requiring additional noise reduction facilities; The components such as the rotor, gear, and bearing of the Roots blower are prone to wear, requiring regular lubrication and replacement, with high maintenance costs; Its air volume adjustment usually relies on valve throttling or variable frequency speed regulation, with a slow response speed and difficulty in adapting to the dynamic change of the air volume demand in the aeration tank. Introducing the surplus gas of the air compressor into the intake pipeline of the aeration tank and using the pressure potential energy of the surplus gas (about 0.8 MPa) to supplement the air required for aeration can reduce the dependence on traditional Roots blowers and can partially replace the Roots blower. In actual application, the pressure of the surplus gas of the air compressor is not stable, but fluctuates greatly with the change of specific production conditions. This pressure fluctuation may cause the gas pressure in the aeration pipeline to be unstable, thereby having an adverse impact on the working efficiency and service life of the aeration device. For example, too high pressure may damage the structure of the aeration head, while too low pressure may lead to insufficient dissolved oxygen, affecting the sewage treatment effect. Summary of the Utility Model
[0004] The technical problem to be solved by the utility model is to propose a device for reusing the surplus gas of an air compressor, which uses the surplus gas of the air compressor for the aeration pipeline to replace the Roots blower, saves energy, and reduces production costs.
[0005] The air compressor waste gas recycling device described in the utility model includes a waste gas collection tank. A pressure adjustment chamber is arranged inside the waste gas collection tank. The pressure adjustment chamber is a cylindrical cavity, inside which an adjustment spring is arranged. The top end of the adjustment spring is fixedly connected to the top wall of the pressure adjustment chamber, and the bottom end of the adjustment spring is fixedly connected to a movable piece. The movable piece fits and is slidably connected to the inner side wall of the pressure adjustment chamber. A limiting rod is slidably penetrated through the movable piece, and both ends of the limiting rod are fixedly connected to the top wall and the bottom wall of the pressure adjustment chamber respectively. An air inlet chamber and a communication air chamber are respectively arranged on the left and right sides of the pressure adjustment chamber. The air inlet chamber is communicated with a waste gas collection pipe. An air inlet and a communication air port are opened on the side wall of the pressure adjustment chamber. The air inlet is arranged at the upper end of the pressure adjustment chamber. The air inlet chamber is communicated with the pressure adjustment chamber through the air inlet. The communication air port is arranged between the air inlet and the bottom wall of the pressure adjustment chamber. The communication air chamber is communicated with the pressure adjustment chamber through the communication air port. An exhaust port is arranged on the bottom wall of the pressure adjustment chamber. The exhaust port is connected to the inlet of a Venturi ejector through an exhaust pipe. The outlet of the Venturi ejector is connected to an aeration pipe, and the ejector port of the Venturi ejector is communicated with the atmosphere.
[0006] Preferably, a filter is arranged on the ejector port of the Venturi ejector.
[0007] Preferably, the movable piece is always located below the air inlet. The thickness of the movable piece is less than the height of the communication air port. The lower edge of the communication air port is not connected to the bottom wall of the pressure adjustment chamber, and the distance between the lower edge of the communication air port and the bottom wall of the pressure adjustment chamber is greater than the thickness of the movable piece.
[0008] Preferably, a flow meter one and a back pressure valve one are arranged on the exhaust pipe. The communication air chamber is communicated with a high-pressure air outlet pipe. A flow meter two and a back pressure valve two are arranged on the high-pressure air outlet pipe. The high-pressure air outlet pipe is connected to the inlet of a high-pressure air buffer tank. The outlet of the high-pressure air buffer tank is connected to the inlet of the Venturi ejector through a voltage stabilizing pipe.
[0009] Preferably, a solenoid valve and a voltage stabilizing valve are arranged on the voltage stabilizing pipe.
[0010] Preferably, a pressure gauge is arranged on the high-pressure air buffer tank.
[0011] Valves can be arranged on the pipeline according to control needs to conveniently control the on-off of the materials in the corresponding pipeline and adjust the flow rate of the materials by opening and closing the valves.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] 1. The surplus air of the air compressor enters the surplus air collection tank through the surplus air collection pipe. First, it enters the intake chamber, then enters the pressure regulation chamber through the intake port, and overcomes the upward elastic force of the regulating spring, making both sides of the movable piece communicate with the connecting air port. The gas passes through the connecting air port from the upper side of the movable piece in the pressure regulation chamber through the connecting air chamber to the lower side of the movable piece in the pressure regulation chamber, and then enters the venturi ejector through the exhaust pipe. After mixing with the air entering through the ejector port, it enters the aeration pipe for use in the aeration tank. When the pressure of the surplus air of the air compressor is too low, the surplus air cannot resist the elastic force of the regulating spring after entering the pressure regulation chamber, so the regulating spring pulls the movable piece up to the upper part of the connecting air port, and the gas cannot pass through the connecting air port. When the air pressure gradually increases, the movable piece moves down, and the gas can enter the exhaust pipe again. When the pressure of the surplus air of the air compressor is too high, the movable piece overcomes the elastic force of the regulating spring and moves to the lower part of the connecting air port, and the gas directly enters the connecting air chamber from the connecting air port and cannot enter the exhaust pipe. The above settings ensure that the pressure of the gas entering the exhaust pipe is within a certain range and does not fluctuate greatly, so that the gas pressure entering the venturi ejector and the aeration pipe will not fluctuate too much to affect the operation of the aeration device.
[0014] 2. Through the surplus air reuse device of the air compressor of the present utility model, the surplus air of the air compressor is used for the aeration pipe, achieving reuse, saving energy, and reducing production costs. Brief Description of the Drawings
[0015] Figure 1 is a schematic structural diagram of the surplus air reuse device of the air compressor of the present utility model;
[0016] Figure 2 is a schematic overall structure diagram of the surplus air collection tank;
[0017] Figure 3 is a schematic internal structure diagram of the surplus air collection tank.
[0018] In the figure: 1. Surplus air collection tank; 2. Pressure regulation chamber; 3. Regulating spring; 4. Movable piece; 5. Limit rod; 6. Intake chamber; 7. Connecting air chamber; 8. Surplus air collection pipe; 9. Intake port; 10. Connecting air port; 11. Exhaust port; 12. Exhaust pipe; 13. Venturi ejector; 14. Aeration pipe; 15. Filter; 16. Flowmeter I; 17. Back pressure valve I; 18. High-pressure outlet pipe; 19. Flowmeter II; 20. Back pressure valve II; 21. High-pressure air buffer tank; 22. Pressure stabilizing pipe; 23. Solenoid valve; 24. Pressure stabilizing valve; 25. Pressure gauge. Detailed Embodiment
[0019] Next, the present utility model will be clearly and completely described in conjunction with the drawings.
[0020] As Figure 1As shown in the figure, the air compressor waste gas recycling device includes a waste gas collection tank 1. Inside the waste gas collection tank 1, there is a pressure adjustment chamber 2. The pressure adjustment chamber 2 is a cylindrical cavity, inside which there is an adjustment spring 3. The top end of the adjustment spring 3 is fixedly connected to the top wall of the pressure adjustment chamber 2, and the bottom end of the adjustment spring 3 is fixedly connected to a movable piece 4. The movable piece 4 fits and is slidably connected to the inner side wall of the pressure adjustment chamber 2. A limiting rod 5 is slidably penetrated through the movable piece 4, and both ends of the limiting rod 5 are fixedly connected to the top wall and the bottom wall of the pressure adjustment chamber 2 respectively. On the left and right sides of the pressure adjustment chamber 2, there are an air inlet chamber 6 and a communication air chamber 7 respectively. The air inlet chamber 6 is communicated with a waste gas collection pipe 8. An air inlet 9 and a communication air port 10 are opened on the side wall of the pressure adjustment chamber 2. The air inlet 9 is arranged at the upper end of the pressure adjustment chamber 2, and the air inlet chamber 6 is communicated with the pressure adjustment chamber 2 through the air inlet 9. The communication air port 10 is arranged between the air inlet 9 and the bottom wall of the pressure adjustment chamber 2, and the communication air chamber 7 is communicated with the pressure adjustment chamber 2 through the communication air port 10. The bottom wall of the pressure adjustment chamber 2 is provided with an exhaust port 11. The exhaust port 11 is connected to the inlet of a Venturi ejector 13 through an exhaust pipe 12. The outlet of the Venturi ejector 13 is connected to an aeration pipe 14. The ejector port of the Venturi ejector 13 is communicated with the atmosphere. A filter 15 is provided on the ejector port of the Venturi ejector 13.
[0021] As Figure 2 , Figure 3 shown in the figure, the movable piece 4 is always located below the air inlet 9. The lower edge of the communication air port 10 is not connected to the bottom wall of the pressure adjustment chamber 2, and the distance between the lower edge of the communication air port 10 and the bottom wall of the pressure adjustment chamber 2 is greater than the thickness of the movable piece 4. A flowmeter one 16 and a back pressure valve one 17 are provided on the exhaust pipe 12. The communication air chamber 7 is communicated with a high-pressure outlet pipe 18. A flowmeter two 19 and a back pressure valve two 20 are provided on the high-pressure outlet pipe 18. The high-pressure outlet pipe 18 is connected to the inlet of a high-pressure air buffer tank 21. A pressure gauge 25 is provided on the high-pressure air buffer tank 21. The outlet of the high-pressure air buffer tank 21 is connected to the inlet of the Venturi ejector 13 through a voltage stabilizing pipe 22. A solenoid valve 23 and a voltage stabilizing valve 24 are provided on the voltage stabilizing pipe 22. The solenoid valve 23 is closer to the high-pressure air buffer tank 21 than the voltage stabilizing valve 24.
[0022] The working process is as follows: The waste gas of the air compressor enters the waste gas collection tank 1 through the waste gas collection pipe 8, first enters the air inlet chamber 6, then enters the pressure adjustment chamber 2 through the air inlet 9, and overcomes the upward elastic force of the adjustment spring 3 to make the movable piece 4 located between the upper and lower edges of the communication air port 10. Both the upper and lower sides of the movable piece 4 are communicated with the communication air port 10. The gas enters the lower side of the movable piece 4 in the pressure adjustment chamber 2 from the upper side of the movable piece 4 in the pressure adjustment chamber 2 through the communication air port 10 and enters the exhaust pipe 12. When the gas pressure is greater than the set pressure of the back pressure valve one 17, the back pressure valve one 17 opens to allow the gas to enter the Venturi ejector 13. After being mixed with the air entering the ejector port after being filtered by the filter 15, it enters the aeration pipe 14 for use in the aeration tank;
[0023] When the residual air pressure of the air compressor entering the residual air collection tank 1 is too low, the residual air cannot resist the elastic force of the regulating spring 3 after entering the pressure regulating chamber 2, so that the movable piece 4 cannot move upward to the upper part of the communication air port 10, and the gas cannot pass through the communication air port 10. Then the gas accumulates in the pressure regulating chamber 2. After the air pressure gradually rises, the movable piece 4 moves downward, and the gas can enter the exhaust pipe 12 again;
[0024] When the residual air pressure of the air compressor entering the residual air collection tank 1 is too high, the movable piece 4 overcomes the elastic force of the regulating spring 3 and moves to the lower part of the communication air port 10. Then the gas directly enters the communication air chamber 7 from the communication air port 10 and cannot enter the exhaust pipe 12. When the gas pressure is greater than the set pressure of the second back pressure valve 20, the second back pressure valve 20 opens, and the residual air enters the high-pressure gas buffer tank 21 through the high-pressure outlet pipe 18; among them, the set pressure of the second back pressure valve 20 is greater than the set pressure of the first back pressure valve 17. Therefore, when there is gas passing through the exhaust pipe 12, the second back pressure valve 20 is in the closed state, and the gas will not be discharged through the high-pressure outlet pipe 18.
[0025] When the first flowmeter 16 detects that there is no gas passing through, the solenoid valve 23 opens, and the gas in the high-pressure gas buffer tank 21 enters the pressure stabilizing pipe 22 and passes through the pressure stabilizing valve 24 into the Venturi injector 13. The above settings ensure that the gas pressure entering the exhaust pipe 12 is within a certain range and has little fluctuation, so that the gas pressure entering the Venturi injector 13 and the aeration pipe 14 will not fluctuate too much to affect the operation of the aeration device.
Claims
1. An air compressor waste gas recycling device, characterized in that: The invention comprises a residual gas collection tank (1), wherein a pressure regulating chamber (2) is provided in the residual gas collection tank (1), wherein an adjusting spring (3) is provided in the pressure regulating chamber (2), wherein the top end of the adjusting spring (3) is fixedly connected to the top wall of the pressure regulating chamber (2), wherein the bottom end of the adjusting spring (3) is fixedly connected to a movable sheet (4), wherein the movable sheet (4) is fitted with and slidably connected to the inner wall of the pressure regulating chamber (2), wherein a limit rod (5) is slidably penetrated on the movable sheet (4), wherein the two ends of the limit rod (5) are respectively fixedly connected to the top wall and the bottom wall of the pressure regulating chamber (2); wherein an air inlet chamber (6) and a connecting air chamber (7) are provided on the left and right sides of the pressure regulating chamber (2), wherein the air inlet chamber (6) is connected to a residual gas collection pipe (8), wherein the pressure regulating chamber ( 2) An air inlet (9) and a connecting air port (10) are provided on the side wall, the air inlet (9) is provided at the upper end of the pressure regulating chamber (2), the air inlet chamber (6) is communicated with the pressure regulating chamber (2) through the air inlet (9), the connecting air port (10) is provided between the air inlet (9) and the bottom wall of the pressure regulating chamber (2), the connecting air chamber (7) is communicated with the pressure regulating chamber (2) through the connecting air port (10); an exhaust port (11) is provided on the bottom wall of the pressure regulating chamber (2), the exhaust port (11) is connected to the inlet of a venturi ejector (13) through an exhaust pipe (12), the outlet of the venturi ejector (13) is connected to an aeration pipe (14), and the ejection port of the venturi ejector (13) is communicated with the atmosphere.
2. The air compressor waste gas recycling device according to claim 1, characterized in that: A filter (15) is provided on the ejection port of the Venturi ejector (13).
3. The air compressor waste gas recycling device according to claim 1, characterized in that: The movable sheet (4) is always located below the air inlet (9), the lower edge of the communicating air port (10) is not in contact with the bottom wall of the pressure regulating chamber (2), and the distance between the lower edge of the communicating air port (10) and the bottom wall of the pressure regulating chamber (2) is greater than the thickness of the movable sheet (4).
4. The air compressor waste gas recycling device according to claim 3, characterized in that: The exhaust pipe (12) is provided with a flow meter 1 (16) and a back pressure valve 1 (17); the communicating air chamber (7) is connected to a high pressure outlet pipe (18); the high pressure outlet pipe (18) is provided with a flow meter 2 (19) and a back pressure valve 2 (20); the high pressure outlet pipe (18) is connected to an inlet of a high pressure gas buffer tank (21); and the outlet of the high pressure gas buffer tank (21) is connected to an inlet of the venturi ejector (13) via a pressure stabilizing tube (22).
5. The air compressor waste gas recycling device according to claim 4, characterized in that: The voltage-stabilizing tube (22) is provided with a solenoid valve (23) and a voltage-stabilizing valve (24).
6. The air compressor waste gas recycling device according to claim 4, characterized in that: A pressure gauge (25) is provided on the high-pressure gas buffer tank (21).