Self-cleaning device for aeration pipe

Abstract

The utility model discloses a self-cleaning device for an aeration pipe, and belongs to the technical field of water treatment equipment. The device comprises an aeration main pipe, an aeration chassis, an aeration branch pipe and a pipeline mixer, two ends of the aeration chassis are respectively connected with one end of the aeration main pipe and one end of the aeration branch pipe, and the aeration main pipe is provided with a first one-way valve and a first pressure sensor; a second one-way valve and a second pressure sensor are arranged on the aeration branch pipe; outlets of the first one-way valve and the second one-way valve face the aeration chassis; a water inlet and a water outlet are respectively formed in two ends of the pipeline mixer, the water outlet is connected with the other end of the aeration branch pipe, and a chemical inlet pipe and an electric valve are arranged at the water inlet. According to the utility model, self-cleaning of the aeration pipe can be realized under the condition that normal operation is not influenced, the aeration pipe is prevented from being blocked, and the service life of a membrane component is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment equipment, and in particular relates to an aeration pipe self-cleaning device. Background Art

[0002] Aeration pipes are one of the commonly used equipment in the field of water treatment. They are mainly used to provide oxygen to promote biological oxidation or oxygen transfer in water bodies. In the process of sewage treatment, aeration pipes are usually installed in aeration tanks or aeration tanks. Air or oxygen is introduced into the water body by spraying bubbles into the water body, thereby increasing the dissolved oxygen content in the water body, promoting the metabolic activities of microorganisms, and thus accelerating the degradation of organic matter. Aeration pipes play the role of oxidation and stirring in sewage treatment, which can effectively improve the efficiency of wastewater treatment and reduce treatment costs.

[0003] Existing aeration pipes are prone to the following problems during long-term operation, especially when operating in sewage: (1) Sludge in the water body flows back into the aeration pipe, and after accumulating or drying in the aeration pipe, it will block the aeration pipe holes, affecting the aeration efficiency and uneven aeration; (2) A large amount of flocculent sludge is easily generated around the aeration pipe, which seriously affects the aeration efficiency of the aeration pipe, resulting in insufficient oxygen supply to the water body and inhibiting the metabolic activity of microorganisms; (3) Sludge backflow and flocculent sludge cover increase the air pressure in the aeration pipe, reduce the air volume, and greatly increase the operating power of the fan. Long-term high power load is likely to cause damage to the fan bearing, posing a safety hazard; (4) The frequency and difficulty of cleaning the membrane module in sewage treatment are increased, shortening the life of the membrane module, which not only reduces the efficiency of water treatment, but also increases maintenance costs.

[0004] In summary, the blockage of the aeration pipe affects the aeration efficiency of the aeration pipe, the life of the membrane assembly, the water quality of the membrane assembly, and the normal operation of the fan. At present, the following cleaning methods are mainly used: (1) Mechanical cleaning: Use special cleaning tools or high-pressure water guns for mechanical cleaning to remove sludge and blockages in the pipe; (2) Chemical cleaning: Use chemical cleaning agents to dissolve the dirt in the pipe. After mixing the cleaning agent with water, introduce the cleaning liquid into the aeration pipe by pumping or soaking to achieve the cleaning effect; (3) Ultrasonic cleaning: Use high-pressure gas to blow the inside of the aeration pipe to blow away impurities or dirt in the pipe; (4) Biological cleaning method: Use some biological cleaning agents or biological enzymes to accelerate the degradation and decomposition of organic matter on the aeration pipe, thereby achieving a cleaning effect. However, each method has its own problems, and all require stopping the system operation, affecting the normal operation effect. Utility Model Content

[0005] Technical problems solved: In view of the above technical problems, the utility model provides an aeration tube self-cleaning device, which can realize self-cleaning of the aeration tube without affecting normal operation, prevent the aeration tube from being blocked, and extend the life of the membrane assembly.

[0006] Technical solution: An aeration pipe self-cleaning device, comprising an aeration main pipe, an aeration chassis, an aeration branch pipe and a pipeline mixer, wherein the two ends of the aeration chassis are respectively connected to the aeration main pipe and one end of the aeration branch pipe, and the aeration main pipe is provided with a first one-way valve and a first pressure sensor; the aeration branch pipe is provided with a second one-way valve and a second pressure sensor; the outlets of the first one-way valve and the second one-way valve are both oriented toward the aeration chassis; the two ends of the pipeline mixer are respectively a water inlet and a water outlet, the water outlet is connected to the other end of the aeration branch pipe, and a medicine inlet pipe and an electric valve are provided at the water inlet.

[0007] Preferably, a conveying screw is provided in the pipeline mixer, and the spiral interval of the conveying screw gradually decreases from the water inlet end to the water outlet end.

[0008] Preferably, the first pressure sensor and the electric valve are linked via a PLC controller.

[0009] Preferably, the pipe diameter of the pipeline mixer is 50-500 mm.

[0010] Preferably, the diameter of the pipeline mixer is 0.09 to 0.11 times its length.

[0011] Preferably, the distance between the inlet of the drug inlet pipe and the water inlet is 90-100 mm.

[0012] Preferably, the diameter of the drug inlet pipe is 0.4 to 0.6 times the diameter of the pipeline mixer.

[0013] Preferably, a membrane assembly is provided on the aeration chassis.

[0014] Preferably, a fan is provided at the inlet of the aeration main pipe.

[0015] Preferably, a fan is provided at the inlet of the medicine inlet pipe.

[0016] Beneficial effects: The use of the utility model effectively ensures the smoothness of the pipeline and ensures the continuous and efficient operation of the equipment. The timely detection and response of the pressure sensor provides strong support for the stable operation of the system, reduces the impact of pipeline blockage, and improves processing efficiency. The automated operation of the entire system can reduce manual intervention, making the equipment operation more convenient and reliable, while saving labor costs and time investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 is a schematic diagram of the cross-sectional structure of a pipeline mixer;

[0019] The meanings of the numbers in the figure are as follows: 1. aeration main pipe, 2. first non-return valve, 3. first pressure sensor, 4. aeration chassis, 5. aeration branch pipe, 6. pipeline mixer, 7. electric valve, 8. membrane assembly, 9. second pressure sensor, 10. second non-return valve, 11. drug inlet pipe, 12. water inlet, 13. water outlet, 14. conveying screw. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. Example 1

[0021] like Figure 1 and Figure 2 As shown, an aeration pipe self-cleaning device includes an aeration main pipe 1, an aeration base 4, an aeration branch pipe 5 and a pipeline mixer 6. The two ends of the aeration base 4 are respectively connected to the aeration main pipe 1 and one end of the aeration branch pipe 5. The aeration main pipe 1 is provided with a first one-way valve 2 and a first pressure sensor 3; the aeration branch pipe 5 is provided with a second one-way valve 10 and a second pressure sensor 9; the outlets of the first one-way valve 2 and the second one-way valve 10 are both oriented toward the aeration base 4; the two ends of the pipeline mixer 6 are respectively a water inlet 12 and a water outlet 13, the water outlet 13 is connected to the other end of the aeration branch pipe 5, and a drug inlet pipe 11 and an electric valve 6 are provided at the water inlet 12. The aeration base 4 is provided with a membrane assembly 8, a fan is provided at the inlet of the aeration main pipe 1, and a fan is provided at the inlet of the drug inlet pipe 11. The first pressure sensor 3 and the electric valve 6 are linked by a PLC controller.

[0022] When in working state, sludge will accumulate continuously at the holes of aeration bottom plate 4, and flocculent sludge will be continuously generated outside the pipeline, causing pipeline blockage. At this time, the internal air pressure of aeration main pipe 1 will continue to increase until the reading of the first pressure sensor 3 is greater than 0.5MPa, and the cleaning mode is started. The fan of aeration main pipe 1 is still in working state. Aeration main pipe 1 and aeration branch pipe 5 provide wind pressure at the same time, so that the sludge settled in the holes of aeration bottom plate 4 can be discharged smoothly. At the same time, the electric valve 6 is opened, and the liquid medicine in the medicine inlet pipe 11 flows into the pipeline mixer 6 and mixes evenly with the gas, and enters the aeration bottom plate 4, so that the flocculent sludge near the aeration bottom plate 4 is settled and decomposed, and blown off and discharged by the additional air pressure provided by the fan. The whole cleaning process lasts for 1~3min. When the reading of the first pressure sensor 3 returns to normal, the cleaning is completed. If it is not in the normal range, the cleaning mode is started again until the reading of the first pressure sensor 3 is normal.

[0023] The first one-way valve 2 and the second one-way valve 10 are both protective devices to avoid excessive pressure difference between the aeration main pipe 1, the aeration branch pipe 5 and the aeration bottom plate 4, which may cause gas-liquid backflow and affect work efficiency; the first pressure sensor 3 and the second pressure sensor 9 monitor the pressure readings of the aeration main pipe 1 and the aeration branch pipe 5 respectively to avoid excessive pressure difference on both sides causing the airflow on one side to be unable to circulate normally.

[0024] The distance L1 between the inlet of the drug inlet pipe 11 and the water inlet 12 should be 90~100mm. The fan is set at the inlet of the drug inlet pipe 11 to ensure that the airflow entering the pipeline mixer 6 can be evenly mixed with the liquid flow entering from the drug inlet pipe 11 to achieve the best mixing effect. The diameter φ1 of the pipeline mixer 6 should be 50~500mm. The specific diameter is set according to the size of the pipeline mixer 6, and the diameter should be 0.09~0.11 times the total length of the pipeline mixer 6. The diameter of the drug inlet pipe 11 should be 0.4~0.6 times the diameter of the pipeline mixer 6, which can achieve the best mixing effect of gas and liquid. A conveying screw 14 is provided in the pipeline mixer 6, and the spiral spacing of the conveying screw 14 gradually decreases from the water inlet 12 end to the water outlet 13 end. When the mixture passes through the sparse spiral of the conveying screw 14, the flow rate of the mixture is slow due to the large spacing of the conveying screw 14, which allows the mixture more time and space to interact and mix; as the mixture continues to pass through the dense spiral, the spacing of the conveying screw 14 gradually decreases, and the flow rate gradually increases, which helps to gather and mix the previously dispersed particles again, further improving the mixing effect. A denser spiral can generate greater shear force and eddy current in a short time, promoting intense mixing of the mixture. Therefore, the design from sparse to dense can provide gradually increasing mixing time and interaction inside the pipeline mixer 6, thereby achieving a more thorough mixing effect.

[0025] The use of this embodiment effectively ensures the smoothness of the pipeline and ensures the continuous and efficient operation of the equipment. The timely detection and response of the pressure sensor provides strong support for the stable operation of the system, reduces the impact of pipeline blockage, and improves processing efficiency. The automated operation of the entire system can reduce manual intervention, making the operation of the equipment more convenient and reliable, while saving labor costs and time investment.

Claims

1. An aeration tube self-cleaning device, characterized in that: The invention comprises an aeration main pipe (1), an aeration base (4), an aeration branch pipe (5) and a pipeline mixer (6), wherein two ends of the aeration base (4) are respectively connected to one end of the aeration main pipe (1) and the aeration branch pipe (5), and the aeration main pipe (1) is provided with a first one-way valve (2) and a first pressure sensor (3); the aeration branch pipe (5) is provided with a second one-way valve (10) and a second pressure sensor (9); the outlets of the first one-way valve (2) and the second one-way valve (10) are both oriented toward the aeration base (4); the two ends of the pipeline mixer (6) are respectively a water inlet (12) and a water outlet (13), the water outlet (13) is connected to the other end of the aeration branch pipe (5), and a drug inlet pipe (11) and an electric valve (7) are provided at the water inlet (12).

2. The aeration tube self-cleaning device according to claim 1, characterized in that: The pipeline mixer (6) is provided with a conveying screw (14), and the spiral interval of the conveying screw (14) gradually decreases from the water inlet (12) end to the water outlet (13) end.

3. The aeration tube self-cleaning device according to claim 1, characterized in that: The first pressure sensor (3) and the electric valve (7) are linked via a PLC controller.

4. The aeration tube self-cleaning device according to claim 1, characterized in that: The pipe diameter of the pipeline mixer (6) is 50-500 mm.

5. The aeration tube self-cleaning device according to claim 1, characterized in that: The diameter of the pipeline mixer (6) is 0.09 to 0.11 times its length.

6. The aeration tube self-cleaning device according to claim 1, characterized in that: The distance between the inlet of the medicine inlet pipe (11) and the water inlet (12) is 90-100 mm.

7. The aeration tube self-cleaning device according to claim 1, characterized in that: The diameter of the drug inlet pipe (11) is 0.4 to 0.6 times the diameter of the pipeline mixer (6).

8. The aeration tube self-cleaning device according to claim 1, characterized in that: A membrane assembly (8) is provided on the aeration base plate (4).

9. The aeration tube self-cleaning device according to claim 1, characterized in that: A fan is provided at the inlet of the aeration main pipe (1).

10. The aeration tube self-cleaning device according to claim 1, characterized in that: A fan is provided at the inlet of the medicine inlet pipe (11).

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