A kind of anti-fouling pulse aeration device

Abstract

The utility model discloses an anti-fouling and clogging pulse aeration device, including an air distribution unit, an air collection unit and an aeration unit, wherein the air distribution unit includes an air inlet pipe, an air distribution groove and a fixing device, and the air distribution groove is provided with air distribution holes and a large-diameter air inlet device; the air collection unit includes an inverted U-shaped structure air collection cover; the aeration unit includes a siphon barrel and an exhaust pipe, and the exhaust pipe is located inside the siphon barrel, the siphon barrel is open at the upper end, and a mud discharge port is provided at the lower end, a mud discharge guide channel is provided below the mud discharge port, a float is provided in the guide pipe, and a limit block is provided below the float, and the mud discharge guide has a hollow structure around the lower end to ensure that the float can float up and down in the hollow structure part. The utility model is provided with a mud discharge port and a float at the bottom of the siphon barrel, and the sinking and floating of the float is controlled by adjusting the air intake of the air distribution groove, and the pulse aeration or mud discharge of the siphon barrel is further controlled, which does not affect the pulse aeration effect and can prevent the bottom of the siphon barrel from being blocked, and has a simple structure and is easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a pulse aeration device which is anti-fouling and anti-clogging. Background Art

[0002] MBR membrane bioreactor is an advanced sewage treatment technology that organically combines high-efficiency membrane separation technology with activated sludge technology. Compared with traditional wastewater biological treatment processes, the membrane bioreactor process has the advantages of good water quality, small footprint, and high degree of automation. It has been widely used in various water treatment fields.

[0003] MBR membrane bioreactors are easily contaminated during use. In order to ensure the normal operation of MBR membrane bioreactors, hollow fiber membranes need to be aerated. Traditional aeration forms mainly include continuous aeration with perforated tubes and intermittent aeration with perforated tubes. Aeration tubes are set at the bottom of the MBR membrane module for continuous or intermittent aeration. The aeration holes of the perforated tubes are easily blocked, resulting in local aeration of the MBR membrane module and mud accumulation. In addition, the aeration energy consumption is high, and the intermittent aeration control valves lead to more valve failures, which in turn affects the normal operation of the membrane system. Pulse aeration is the current mainstream aeration method for submerged ultrafiltration. The inverted siphon principle can be used to convert continuous airflow into intermittent pulse airflow, which can reduce the energy consumption of membrane pool operation and slow down membrane pollution.

[0004] Existing pulse aeration generally includes an air distribution unit and an aeration unit. The aeration unit includes an air collection unit and an exhaust device. The air collection unit is a siphon tube or siphon barrel that opens upward and is closed at the lower end. During use, sludge is easily deposited at the bottom of the siphon tube / siphon barrel, causing blockage. When there is a lot of sludge deposited, it will block the bottom of the exhaust pipe, causing aeration failure. Chinese patent CN219620970U adopts a funnel-shaped mud discharge port at the bottom of the U-shaped siphon pipe, but the mud discharge port is small, so the sludge cannot be discharged and the mud discharge port is easy to be blocked. If the mud discharge port is opened with a large hole, the siphon principle is destroyed and the pulse aeration effect cannot be achieved. Chinese patent CN216946405U uses a high-pressure cleaning device including a high-pressure water gun extension tube, a connecting nozzle and a cleaning tube, which can realize in-situ cleaning (flushing, flushing) of the pulse aeration device. The operation is inconvenient and the MBR membrane bioreactor that is in operation cannot be cleaned. Summary of the invention

[0005] Technical problem: The technical problem to be solved by the utility model is to provide a pulse aeration device that is resistant to fouling and clogging, so as to solve the problem that silt is easily deposited at the bottom of the U-shaped pipe of the aeration pulse device in the prior art, causing clogging.

[0006] Technical solution: In order to solve the above technical problems, the technical solution adopted by the embodiment of the utility model is: a kind of anti-fouling and clogging pulse aeration device, including an air distribution unit, an air collecting unit and an aeration unit, the air distribution unit includes an air inlet pipe, an air distribution trough and a fixing device, the air distribution trough is an inverted U-shaped structure opening downward, one end of which is connected to the air inlet pipe, and the other end is provided with a fixing piece connected to the membrane frame; the air distribution trough is provided with air distribution holes and a large-diameter air inlet device, and the gas can enter the air collecting unit through the air distribution holes and the large-diameter air inlet device; the air collecting unit includes an inverted U-shaped structure air collecting hood opening downward, the air collecting hood is located directly above the air distribution trough, and the downward positive projection area of ​​the air collecting hood (3) is larger than the downward positive projection area of ​​the air distribution trough (2), so as to ensure that the gas The sewage can enter the air collecting hood through the air distribution holes and can be discharged smoothly; the aeration unit includes a siphon bucket and an exhaust pipe, the exhaust pipe is located inside the siphon bucket, and a gap is left between the lower end and the bottom of the siphon bucket tube; the siphon bucket is open at the upper end, and a mud discharge port is provided at the lower end, a mud discharge diversion channel is provided below the mud discharge port, a float is provided in the diversion pipe, a limit block is provided below the float, a chamfer is provided at the lower end of the mud discharge diversion channel, and a hollow structure is provided around the chamfer below the chamfer, the cross-sectional diameter of the hollow structure part is larger than the diameter of the mud discharge diversion channel, and the height of the hollow structure part is larger than the diameter of the float, so as to ensure that the float can float up and down in the hollow structure part, and when the float is in a sinking state, the sludge at the bottom of the siphon bucket can be discharged smoothly through the mud discharge diversion channel.

[0007] Preferably, the air distribution holes are located on the top or side of the air distribution groove.

[0008] Preferably, the large-diameter air intake device is an extended pipe with two ends connected, the upper end of the extended pipe is connected to the top of the air distribution groove and is sealed and fixedly connected, and the bottom is higher than the bottom of the side wall of the air distribution groove. When the amount of gas entering the air distribution groove is normal, the gas enters the air collecting unit through the air distribution hole. When the amount of gas entering the air distribution groove is large, the gas can enter the air collecting unit from the extended pipe.

[0009] Preferably, the large-diameter air inlet device is arranged on the side of the air distribution groove, that is, a groove is opened on the side of the air distribution groove, and the upper end of the groove is lower than the lower end of the air distribution hole. When the amount of gas entering the air distribution groove is normal, the gas enters the air distribution groove through the air distribution hole. When the amount of gas entering the air distribution groove is large, the gas can enter the gas collecting unit from the groove.

[0010] Preferably, there are multiple air collecting units above the air distribution groove, and each air collecting unit covers ≥1 large-diameter air inlet device and air distribution hole.

[0011] Preferably, the diameter of the mud discharge port is greater than 5 mm.

[0012] Preferably, the diameter of the float is larger than the diameter of the mud discharge port.

[0013] Preferably, the density of the float is 0.5-0.9 g / cm 3

[0014] Preferably, the air distribution unit and the air collection unit are connected by a snap-fit ​​connection, which is convenient for loading and unloading and simple to operate.

[0015] Beneficial effects: Compared with the prior art, the technical solution of the utility model has the following beneficial effects: the utility model provides a mud discharge port and a float at the bottom of the siphon barrel, and controls the sinking and floating of the float by adjusting the air intake of the air distribution groove, thereby further controlling the pulse aeration or mud discharge of the pulse siphon barrel, which does not affect the pulse aeration effect and can prevent the bottom of the siphon barrel from being blocked. It has no external valves, a simple structure, and is easy to operate.

[0016] The lower end of the mud discharge guide channel of the utility model is provided with a chamfer, which can be closely combined with the float ball better, has a better sealing effect, and makes the pulse aeration effect better.

[0017] The utility model is provided with a large-diameter air intake device on the air distribution groove. On the one hand, the air intake amount can be increased so that the gas enters the air collecting groove from the large-diameter air intake device, thereby controlling the sinking and floating of the float. On the other hand, the problem of being unable to intake air due to blockage of the air distribution holes can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of an anti-fouling pulse aeration device.

[0019] Figure 2 The present invention is a cross-sectional schematic diagram of an anti-fouling and anti-clogging pulse aeration device.

[0020] Figure 3 It is a schematic structural diagram of an air distribution unit according to an embodiment.

[0021] Figure 4 yes Figure 3 Schematic cross-section of the air distribution unit.

[0022] Figure 5 It is a schematic structural diagram of an air distribution unit according to an embodiment.

[0023] Figure 6 It is a structural schematic diagram of a siphon barrel aeration device.

[0024] Figure 7 It is a cross-sectional schematic diagram of the siphon barrel aeration device (with the float ball floating).

[0025] Figure 8 It is a cross-sectional schematic diagram of the siphon barrel aeration device (with the float sinking).

[0026] The figure includes: 1. air inlet pipe; 2. air distribution slot; 3. air collecting hood; 4. aeration outlet hole; 5. air distribution hole; 6. extension pipe; 7. siphon aeration device; 8. exhaust pipe; 9. fixing bracket; 10. float; 11. mud drainage channel; 12. limit block; 13. fixing piece; 14. buckle; 15. siphon bucket; 16. chamfer; 17. groove DETAILED DESCRIPTION

[0027] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings.

[0028] See also Figure 1-8 The utility model provides a technical solution: an anti-fouling and clogging pulse aeration device, including an air distribution unit, an air collecting unit and an aeration unit. The air distribution unit includes an air inlet pipe 1, an air distribution groove 2 and a fixing device. The air distribution groove 2 is an inverted U-shaped structure with an opening downward, one end of which is connected to the air inlet pipe 1, and the other end is provided with a fixing 13 connected to the membrane frame.

[0029] The gas distribution slot 2 is provided with gas distribution holes 5 and a large-diameter air intake device, through which gas can enter the gas collection unit. The gas distribution holes can be arranged on the top or side of the gas distribution slot 2, and the large-diameter air intake device can be an extended pipe with two ends connected, and the upper end of the extended pipe is connected to the top of the gas distribution slot and is sealed and fixed (such as Figure 3 ), when the amount of gas introduced into the gas distribution groove 2 is normal, the gas enters the gas collecting unit through the gas distribution hole 5. When the amount of gas introduced into the gas distribution groove 2 is large, the gas can enter the gas collecting unit from the extension pipe 6.

[0030] Furthermore, if Figure 5 The large-diameter air intake device can also be arranged on the side of the air distribution groove 2, that is, a groove 17 is opened on the side of the air distribution groove 2, and the upper end of the groove 17 is lower than the lower end of the air distribution hole 5. When the amount of gas entering the air distribution groove 2 is normal, the gas enters the air distribution groove 2 through the air distribution hole 5. When the amount of gas entering the air distribution groove 2 is large, the gas can enter the gas collecting unit from the groove 17.

[0031] The gas collecting unit includes an inverted U-shaped gas collecting hood 3 opening downward, the gas collecting hood 3 is located directly above the gas distribution trough 2, and the downward orthographic projection area of ​​the gas collecting hood 3 is larger than the downward orthographic projection area of ​​the gas distribution trough 2, ensuring that the gas can enter the gas collecting hood 3 through the gas distribution holes 5 and the sewage in the gas collecting hood 3 can be smoothly discharged from the lower end of the gas collecting hood 3.

[0032] The aeration unit includes a siphon barrel aeration device 7 and an exhaust pipe 8, wherein the exhaust pipe 8 is located inside the siphon barrel aeration device. The siphon aeration device 7 includes a siphon barrel 15 and a mud discharge device. The upper end of the exhaust pipe 8 is higher than the upper end of the siphon barrel 15 and is connected to the gas collecting hood 3. A gap is left between the lower end of the exhaust pipe 8 and the bottom of the siphon barrel 15 to ensure that gas can discharge bubbles to the outside from the exhaust pipe 8 during pulse aeration.

[0033] The upper end of the siphon bucket 15 is open and is fixed to the upper end of the air collecting hood 3 by a fixing bracket 9. The lower end of the siphon bucket 15 is provided with a mud discharge port, and a mud discharge diversion channel 11 is provided below the mud discharge port. The upper end diameter of the mud discharge diversion channel 11 is the same as the diameter of the mud discharge port. A float 10 is provided in the mud discharge diversion channel 11, and a limit block 12 is provided below the float 10. A chamfer 16 is provided in the mud discharge diversion channel 11, and a hollow structure is provided around the chamfer 16. The cross-sectional diameter of the hollow structure part is larger than the diameter of the mud discharge diversion channel 11, and the height of the hollow structure part is larger than the diameter of the float 10, so as to ensure that the float 10 can float up and down in the hollow structure part, and when the float 10 is in a sunken state, the sludge at the bottom of the siphon bucket 15 can be smoothly discharged through the mud discharge diversion channel 11.

[0034] Preferably, a plurality of air collecting units are arranged above the air distribution groove 2 , and each air collecting unit covers a plurality of large-diameter air inlet devices and air distribution holes 5 .

[0035] Preferably, the diameter of the mud discharge port is greater than 5 mm, so as to facilitate the smooth discharge of the mud at the bottom of the siphon bucket 15.

[0036] Preferably, the diameter of the float is larger than the diameter of the mud discharge port.

[0037] Preferably, the siphon barrel 15 and the mud discharge diversion channel 11 are an integrated structure.

[0038] Preferably, the density of the float is 0.5-0.9 g / cm 3 .

[0039] Preferably, the air distribution unit and the air collection unit are connected by a buckle, which is convenient for loading and unloading and simple to operate.

[0040] Working process: After the ventilation pipe is ventilated, the air intake pressure is set, and the gas continuously enters the corresponding gas collection unit through the air distribution holes of the air distribution groove and gathers at the top of the gas collection hood. Under the action of air pressure, the water in the gas collection hood is gradually discharged, and the interface between the gas and water in the gas collection hood will gradually decrease until the interface between the gas and water in the gas collection hood reaches the lower end surface of the exhaust pipe. The gas is discharged from the exhaust channel to form aeration. Because the float is in a floating state under normal working pressure, the float can seal the bottom of the siphon barrel, so it does not affect the pulse aeration effect. When it is necessary to discharge sludge, increase the air intake pressure, and the gas quickly gathers in the air distribution groove. After reaching a certain amount of gas, the gas enters the gas collection unit through the large-diameter air intake device, and the gas quickly gathers in the gas collection hood. The interface between the gas and water in the liquid gas collection hood will drop rapidly. The buoyancy of the float is less than its own gravity, and the float sinks. The sludge is discharged from the sludge discharge diversion channel 11 to achieve the sludge discharge effect.

[0041] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above specific embodiments. The above specific embodiments and the description in the specification are only for further illustrating the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the claims and their equivalents.

Claims

1. An anti-fouling pulse aeration device, characterized in that: include: An air distribution unit, an air collection unit and an aeration unit, wherein the air distribution unit comprises an air inlet pipe (1), an air distribution trough (2) and a fixing device, wherein the air distribution trough (2) is an inverted U-shaped structure opening downward, one end of which is connected to the air inlet pipe (1), and the other end of which is provided with a fixing piece (13) connected to a membrane frame; the air distribution trough (2) is provided with air distribution holes (5) and a large-diameter air inlet device, and gas can enter the air collection unit through the air distribution holes (5) and the large-diameter air inlet device; the air collection unit comprises an inverted U-shaped structure air collection hood (3) opening downward, the air collection hood (3) is located directly above the air distribution trough (2), and the downward orthographic projection area of ​​the air collection hood (3) is larger than the downward orthographic projection area of ​​the air distribution trough (2), so as to ensure that gas can enter the air collection hood (3) through the air distribution holes (5) and sewage can be discharged smoothly; The aeration unit comprises a siphon aeration device (7) and an exhaust pipe (8), wherein the exhaust pipe (8) is located inside the siphon aeration device (7), and the siphon aeration device (7) comprises a siphon bucket (15) and a mud discharge device, wherein a gap is left between the lower end of the exhaust pipe (8) and the bottom of the siphon bucket; the siphon bucket (15) is open at the upper end, and is provided with a mud discharge port at the lower end; a mud discharge guide channel (11) is provided below the mud discharge port; a float (10) is provided in the mud discharge guide channel (11), and a limit block (12) is provided below the float (10); a chamfer (16) is provided at the lower end of the mud discharge guide channel (11), and a hollow structure is provided around the lower end of the chamfer (16); the cross section of the hollow structure portion is directly larger than the diameter of the mud discharge guide channel (11), and the height of the hollow structure portion is larger than the diameter of the float (10).

2. The anti-fouling pulse aeration device according to claim 1, characterized in that: The air distribution holes (5) are located on the top or side of the air distribution groove (2).

3. The anti-fouling pulse aeration device according to claim 1, characterized in that: The large-diameter air intake device is an extended pipe (6) with two ends connected. The upper end of the extended pipe (6) is connected to the top of the air distribution groove (2) and is sealed and fixedly connected. The bottom of the extended pipe (6) is higher than the bottom of the side wall of the air distribution groove (2). When the amount of gas entering the air distribution groove (2) is normal, the gas enters the air collection unit through the air distribution hole (5). When the amount of gas entering the air distribution groove is large, the gas can enter the air collection unit from the extended pipe (6).

4. The anti-fouling pulse aeration device according to claim 1, characterized in that: The large-diameter air intake device is arranged on the side of the air distribution groove (2), that is, a groove (17) is opened on the side of the air distribution groove (2), and the upper end of the groove (17) is lower than the lower end of the air distribution hole (5). When the amount of air entering the air distribution groove (2) is normal, the gas enters the air distribution groove (2) through the air distribution hole. When the amount of air entering the air distribution groove is large, the gas can enter the air collection unit from the groove (17).

5. The anti-fouling pulse aeration device according to claim 1, characterized in that: There are multiple air collecting units above the air distribution groove, and each air collecting unit covers ≥1 large-diameter air inlet device and air distribution hole.

6. The anti-fouling pulse aeration device according to claim 1, characterized in that: The diameter of the mud discharge port is greater than 5 mm.

7. The anti-fouling pulse aeration device according to claim 1, characterized in that: The diameter of the floating ball (10) is greater than the diameter of the mud discharge port.

8. The anti-fouling pulse aeration device according to claim 1, characterized in that: The density of the float (10) is 0.5-0.9 g / cm 3 .

9. The anti-fouling pulse aeration device according to claim 1, characterized in that: The air distribution unit is connected to the air collection unit via a buckle (14).

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