Non-clogging pulse aeration device

Abstract

The utility model provides a kind of clogging-free pulse aeration device, including the aeration tank of bottom opening, the baffle is arranged in the aeration tank, baffle is provided with curved portion, the baffle divides aeration tank into the gas supply cavity of bottom opening and the gas collection cavity of bottom opening;The one end of the aeration tank is provided with the gas supply nozzle for connecting gas source, and the one end of the gas supply nozzle is communicated with gas supply cavity;N baffle is arranged in the gas collection cavity, and n+1 gas collection cavities are divided into n baffle, and each gas collection cavity is provided with aeration assembly for realizing pulse aeration;The bottom side of the baffle is provided with gas distribution port, and single gas distribution port makes single gas collection cavity and gas supply cavity be communicated.The utility model has the advantages of uniform gas distribution, energy-efficient, maintenance-free, and no clogging.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment, and in particular to a non-clogging pulse aeration device. Background Technology

[0002] Membrane bioreactors (MBRs) are one of the core technologies in wastewater treatment and resource recovery today. Hollow fiber membrane modules, in particular, have gained widespread application due to their high packing density, large specific surface area, and significant cost-effectiveness. However, during continuous operation, pollutants accumulate on the membrane surface, leading to a continuous decline in membrane flux. Aeration devices in MBRs serve a dual function: oxygen supply and membrane fouling control. By placing the aeration device at the bottom of the membrane module, it uses the shearing action and turbulent flow generated by the air bubbles and the aqueous phase to flush and clean the membrane fibers.

[0003] To improve the cleaning effect of aeration devices on membrane surfaces, pulse aeration devices have emerged in recent years. For example, the pulse aeration device for membrane modules disclosed in patent publication number CN218810815U includes an air supply device, an air collection device, and an aeration device. The air collection device includes an air collection chamber with an open bottom, which is divided into several air collection units. Each air collection unit is equipped with an aeration pipe, and several aeration pipes form an aeration device. The upper opening of the aeration pipe is located on the top plate, and the lower opening communicates with the air collection chamber. The air supply device includes a vertical air supply pipe, a horizontal air supply pipe, and a sludge discharge pipe connected in sequence. The horizontal air supply pipe is located at the bottom of the air collection chamber and has several air supply holes that communicate with the air collection chamber. During operation, the vertical air supply pipe is connected to the aerator, allowing the gas generated by the aerator to enter the horizontal air supply pipe via the vertical air supply pipe. Part of the gas is discharged into the air collection chamber through the air supply holes. The gas gathers at the top of the air collection chamber, gradually lowering the water level. When the water level reaches the lower opening of the aeration pipe, the combined effect of water and air pressure causes air to instantly flow out through the upper opening of the aeration pipe, while water flows back into the air collection chamber, creating a siphon effect. This achieves pulse aeration and washes and cleans the membrane fibers. The remaining gas is discharged through the sludge discharge port, achieving the effect of sludge removal from the air supply pipe.

[0004] However, in the use of existing technology, in order to maintain the pressure and volume of gas remaining in the pipeline for sewage discharge, the aeration blower needs to output a higher pressure airflow, which significantly increases the power load of the aeration blower, resulting in higher energy consumption and cost.

[0005] To address the above pain points, the industry urgently needs to develop an energy-efficient pulse aeration device that can self-clean, discharge sludge, and prevent clogging. Utility Model Content

[0006] In order to improve the existing problems of uneven air intake and excessive energy consumption, this utility model provides an energy-saving and efficient pulse aeration device that can self-clean and discharge sludge and prevent clogging.

[0007] This utility model provides a non-clogging pulse aeration device, which adopts the following technical solution: A clog-free pulse aeration device includes an aeration box with an open bottom. The aeration box is characterized by: a baffle plate with a curved portion dividing it into an air supply chamber and an air collection chamber with an open bottom; an air supply nozzle for connecting to an air source is located at one end of the aeration box, and one end of the nozzle communicates with the air supply chamber; n partitions are arranged within the air collection chamber, dividing it into n+1 air collection chambers, each of which contains an aeration component for pulse aeration; and an air distribution port is provided on the bottom side of the baffle plate, allowing a single air collection chamber to communicate with the air supply chamber. The aeration assembly includes an exhaust pipe passing through the aeration box and an air-gathering hood covering the bottom of the exhaust pipe. The air-gathering hood has an air inlet, and there is a gap between the air inlet and the exhaust pipe for air circulation. The bottom of the air-gathering hood has a sludge discharge hole with an inverted V-shaped cross-section. The air-collecting chamber wall is provided with a connecting block for fixing the air-gathering hood, and the connecting block is detachably connected to the air-gathering hood.

[0008] By adopting the above technical solution, before the gas is introduced, the wastewater in the MBR membrane bioreactor will be injected from the bottom of the gas supply chamber and the gas collection chamber.

[0009] During operation, gas enters the air supply chamber through the air supply nozzle. The curved section stabilizes the airflow within the chamber, reducing resistance and ensuring even distribution. Simultaneously, the gas rises due to buoyancy, and combined with the gravitational pressure and obstruction of the wastewater at the bottom of the chamber, the gas preferentially fills the top of the air supply chamber. As gas is continuously supplied, air pressure gradually compresses the gas downwards until it reaches the distribution port, ensuring even distribution of gas to each collection chamber and effectively preventing deviations in the air intake volume of each chamber.

[0010] Air introduced into the gas collection chamber gathers at the top. As more gas enters, water is gradually expelled, increasing the air pressure within the chamber. This pressure drives the water level to gradually drop until the gas reaches the lower end of the exhaust pipe. The combined effect of water and air pressure creates a momentary pulse of aeration, instantly releasing the gas as large bubbles through the exhaust pipe. Simultaneously, a siphon effect occurs, causing water to flow back into the gas collection chamber and the gas-gathering hood. By continuously repeating this process, intermittent exhaust creates high-energy bubbles. These rising bubbles possess significant energy to scour the membrane fibers, resulting in high energy utilization and excellent cleaning performance.

[0011] The gas supply chamber, bending section, and air distribution holes ensure more uniform gas distribution to each gas collection chamber, guaranteeing even and effective subsequent rinsing of the membrane fibers. Furthermore, gas within the gas collection chamber can only exit through the exhaust pipe, with no other micro-gaps, preventing gas leakage, reducing gas loss, and ensuring stable air pressure within the chamber, thereby improving pulse aeration efficiency and reducing energy consumption. Additionally, the bottom-opening gas supply chamber and gas collection chamber allow sludge located within them to be discharged through gravity and air pressure during operation. This means that sludge discharge occurs simultaneously with gas collection, eliminating the need for additional energy for cleaning. Simultaneously, the inverted V-shaped sludge discharge holes prevent the reverse entry of even a small amount of settled heavy particles, effectively preventing duct blockage caused by particle deposition when aeration stops. This makes the device maintenance-free, requiring no additional energy for sludge discharge.

[0012] Preferably, the air supply chamber is provided with multiple reinforcing ribs; each air collection chamber is provided with reinforcing ribs; and the outer wall of the aeration box is provided with reinforcing ribs.

[0013] By employing the above technical solution, multiple reinforcing ribs and bends work together to enhance the structural strength of the air supply chamber wall. The reinforcing ribs and bends work together to enhance the structural strength of each air collection chamber wall. By strengthening the structural strength of both the air supply chamber wall and each air collection chamber wall, durability under high-pressure environments is ensured. Furthermore, the reinforcing ribs further increase structural strength.

[0014] Preferably, the gas-gathering hood is cup-shaped, with the top of the gas-gathering hood serving as an air inlet, and the gas-gathering hood gradually contracts from near the air inlet to away from the air inlet.

[0015] By adopting the above technical solution, the gradually shrinking air-gathering hood helps guide the internal sludge to be discharged from the sludge discharge hole.

[0016] Preferably, the connecting block is integrally formed on the gas collecting chamber wall, and the gas collecting hood is provided with a slider part. The slider part and the connecting block slide against each other, and the connecting block and the gas collecting hood are detachably connected.

[0017] By adopting the above technical solution, during installation, the sliding block of the gas-gathering hood is slid into the connecting block for quick and easy alignment, and then secured with bolts. During disassembly, the hood can be removed by removing the bolts and driving the sliding block away from the connecting block. This design, through the combination of the sliding block and bolts, provides a convenient method for installation and disassembly, ensuring a stable connection while facilitating maintenance and replacement.

[0018] Preferably, one end of the connecting block extends into the gas-gathering hood, and the connecting block 73 extending to one end of the gas-gathering hood is detachably connected to the gas-gathering hood.

[0019] By adopting the above technical solution, the processing of the gas-concentrating hood can be simplified, and the gas-concentrating hood does not need to have an additional slider part, thus reducing processing costs.

[0020] Preferably, the connecting block is connected to the gas-gathering hood by bolts, clips, or pins.

[0021] By adopting the above technical solutions, multiple connection methods provide flexibility, allowing the selection of the most suitable fixing method according to actual needs, ensuring the stability and convenience of the connection.

[0022] Preferably, the gas-gathering hood is a structural component made of PTFE material.

[0023] By adopting the above technical solution, the all-PTFE material has excellent smoothness and water repellency, making it difficult for microorganisms and sludge to adhere. This inhibits the adhesion of microorganisms and sludge, solving the problem of easy clogging of orifices in traditional aeration devices after long-term use. It also eliminates the need for chemical cleaning and has a long service life.

[0024] Preferably, the aeration box, baffle, partition, air supply nozzle, reinforcing rib, reinforcing rib, exhaust pipe and connecting block are integrally injection molded from ABS composite material.

[0025] By adopting the above technical solutions, ABS material not only possesses excellent physical properties, good chemical stability, and processability, but also high structural strength and durability, effectively ensuring the stability and reliability of the aeration box. Furthermore, the ease of processing ABS material reduces production costs while optimizing molding precision and overall process effects, contributing to improved equipment lifespan and economic efficiency.

[0026] Preferably, the exhaust pipe extends from one end of the aeration box and is detachably connected to a distributor.

[0027] By adopting the above technical solution, during operation, the large air bubbles discharged from the exhaust pipe enter the distributor through the air inlet pipe for diversion, forming multiple small air bubbles that are discharged. These small air bubbles can achieve a uniform cleaning effect on the membrane modules within the coverage area.

[0028] Preferably, the diverter includes at least two diverter pipes and an air inlet pipe. The inner wall of the air inlet pipe is provided with an internal thread, and the end of the exhaust pipe extending out of the top of the aeration box is provided with an external thread. The external thread and the internal thread are mutually adapted.

[0029] By adopting the above technical solution, the exhaust pipe is threadedly connected to the distributor, making the disassembly and assembly of the exhaust pipe and the distributor convenient and reliable.

[0030] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the function of the air supply chamber, the bending part and the air distribution hole, the gas delivered to each air collection chamber is more uniform, ensuring that the subsequent rinsing of the membrane fibers is uniform and effective. 2. The gas in the gas collection chamber can only be discharged through the exhaust pipe, with no other tiny gaps, which helps to prevent gas leakage, reduce gas loss, ensure stable gas pressure in the gas collection chamber, improve the efficiency of pulse aeration, and reduce energy consumption. 3. The sludge located in the air supply chamber and air collection chamber, which are open at the bottom, will be discharged by gravity and air pressure during use, without the need for additional energy consumption for cleaning. At the same time, the inverted V-shaped sludge discharge hole prevents a very small amount of settled heavy particles from entering in reverse, which can effectively prevent the channel blockage caused by particle deposition when aeration stops. This makes the device maintenance-free and requires no additional energy consumption for sludge discharge. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.

[0033] Figure 2 This is a schematic diagram of the bottom structure of Embodiment 1 of this utility model.

[0034] Figure 3 This is a structural cross-sectional view of Embodiment 1 of this utility model.

[0035] Figure 4 This is a schematic diagram of the airflow direction in Embodiment 1 of this utility model.

[0036] Figure 5 This is a partial cross-sectional view of Embodiment 1 of this utility model.

[0037] Figure 6 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model.

[0038] Figure 7 This is a schematic diagram of the bottom structure of Embodiment 2 of this utility model.

[0039] Figure 8 This is a partial cross-sectional view of Embodiment 2 of this utility model.

[0040] Figure 9 yes Figure 8 Enlarged view of point A in the middle.

[0041] The component designations are as follows: 1. Aeration box; 2. Baffle; 21. Bending part; 3. Air supply chamber; 4. Air collection chamber; 41. Air collection chamber; 5. Air supply nozzle; 6. Partition; 7. Aeration assembly; 71. Exhaust pipe; 72. Air gathering hood; 721. Sliding block; 73. Connecting block; 8. Air distribution port; 9. Sludge discharge hole; 10. Reinforcing rib; 11. Reinforcing rib; 12. Reinforcing rib; 13. Diverter; 14. Internal thread; 15. External thread. Detailed Implementation

[0042] The following will refer to the appendix in the embodiments of this utility model. Figures 1 to 9 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example

[0043] A clog-free pulse aeration device, as described in the following article. Figure 1 and Figure 2 It includes an aeration box 1 with an open bottom, and the aeration box 1 is rectangular in shape. A baffle 2 is provided inside the aeration box 1, which divides the aeration box 1 into an air supply chamber 3 with an open bottom and an air collection chamber 4 with an open bottom.

[0044] Reference Figure 2 The air supply chamber 3 is approximately L-shaped. The shorter side of the air supply chamber 3 is distributed along the width direction of the aeration box 1 and is close to one end of the aeration box 1. The longer side of the air supply chamber 3 is distributed along the length direction of the aeration box 1 and is close to one long side of the aeration box 1. One end of the aeration box 1 is provided with an air supply nozzle 5 for connecting to an air source, and one end of the air supply nozzle 5 is connected to the air supply chamber 3. Therefore, by connecting the air supply nozzle 5 to the air source, gas can be introduced into the air supply chamber 3.

[0045] Reference Figure 2The baffle 2 has a semi-circular recessed curved portion 21 extending along its height. This curved portion 21 increases the moment of inertia of the baffle 2's cross-section, thereby enhancing its resistance to deformation in the height direction and preventing deformation under high pressure or continuous airflow impact. When gas enters from the gas supply nozzle 5, the curved portion 21 disrupts the stable boundary layer near the pipe wall, causing disturbance in the airflow within the boundary layer. This helps maintain the boundary layer's adhesion, reduces eddy current losses, improves airflow stability, and makes the airflow velocity distribution across the cross-section more uniform, reducing pressure fluctuations caused by excessively high local velocities. Furthermore, since the gas supply chamber 3 is approximately L-shaped, the airflow inevitably passes through a corner upon entry. Eddy current zones easily form at the bend. The curved portion 21 provides a slight change in the flow path at the pipe wall, interfering with the eddy current formation conditions, dispersing concentrated eddies into smaller disturbances, and reducing overall resistance. In other words, the curved portion 21 stabilizes the airflow in the gas supply chamber 3, reduces resistance, and uniformly delivers gas.

[0046] Reference Figure 2 and Figure 3 A partition 6, rectangular in shape, is installed inside the air collection cavity 4. The partitions 6 are distributed along the width of the aeration box 1, and there are n partitions 6 arranged at intervals along the length of the aeration box 1. Through the division effect of the n partitions 6, the air collection cavity 4 is divided into n+1 air collection chambers 41, and each air collection chamber 41 is equipped with an aeration component 7 for pulse aeration. In this embodiment, two partitions 6 are provided, arranged at intervals along the length of the aeration box 1, dividing the air collection cavity 4 into three air collection chambers 41 sequentially distributed along the length of the aeration box 1. Each of the three air collection chambers 41 is equipped with one aeration component 7.

[0047] Reference Figure 2 The air supply chamber 3 is equipped with reinforcing ribs 10, which are elongated plates. One side of each reinforcing rib 10 is connected to the top of the aeration box 1. Multiple reinforcing ribs 10 are provided, and their combined action with the bending portion 21 enhances the structural strength of the air supply chamber 3 wall (which surrounds the aeration box 1 wall and baffle 2). Additionally, each air collection chamber 41 is equipped with reinforcing ribs 11, which are elongated and distributed along the height of the aeration box 1. Two reinforcing ribs 11 are provided in each air collection chamber 41, spaced apart along the length of the aeration box 1. These reinforcing ribs 11 and the bending portion 21 further enhance the structural strength of each air collection chamber 41 wall (which surrounds the aeration box 1 wall, baffle 2, and partition 6). By enhancing the structural strength of the air supply chamber 3 wall and each air collection chamber 41 wall, durability under high-pressure environments is ensured.

[0048] Reference Figure 1 and Figure 2The outer wall of the aeration box 1 is provided with reinforcing ribs 12. The reinforcing ribs 12 are long strips and are arranged along the height direction of the aeration box 1. There are several reinforcing ribs 12, and the several reinforcing ribs are arranged at intervals along the length direction of the aeration box 1, and are all located on one long side of the aeration box 1.

[0049] Reference Figure 2 and Figure 3 A gas distribution port 8 is provided on the bottom side of the baffle 2, and the gas distribution port 8 extends through the front and rear surfaces of the baffle 2. A single gas distribution port 8 connects a single gas collection chamber 41 with the gas supply chamber 3. There are three gas distribution ports 8 corresponding to the number of gas collection chambers 41. The three gas distribution ports 8 are distributed at intervals along the length of the aeration box 1, and the three gas distribution ports 8 are connected to the three gas collection chambers 41 one by one.

[0050] Before gas is introduced, wastewater from the MBR membrane bioreactor is poured into the air supply chamber 3 from its bottom, as the bottom of the chamber is open. During operation, gas is introduced into the air supply chamber 3 through the air supply nozzle 5. The curved part 21 stabilizes the airflow in the air supply chamber 3, reduces resistance, and ensures uniform delivery. Because the gas density is much lower than the surrounding liquid, the gas will rise due to buoyancy. Combined with the gravity and obstruction of the wastewater at the bottom of the air supply chamber 3, the gas will preferentially fill the top of the air supply chamber 3. During the continuous gas introduction, the gas is gradually squeezed downwards by the air pressure until it reaches the three air distribution ports 8, thus ensuring that the gas is evenly introduced into the three gas collection chambers 41 from the three air distribution ports 8, effectively avoiding deviations in the air intake of each gas collection chamber 41. Then, synchronous pulse aeration is achieved through the aeration components 7 in each gas collection chamber 41, which ensures more uniform rinsing and cleaning of the membrane surface.

[0051] Specifically, refer to Figure 3 and Figure 4 The aeration assembly 7 includes an exhaust pipe 71 passing through the aeration box 1 and an air-gathering hood 72 covering the bottom of the exhaust pipe 71. The exhaust pipe 71 is a long, circular pipe distributed along the height of the aeration box 1, passing through the top of the aeration box 1, such that one end of the exhaust pipe 71 is located in the air collection chamber 41, and the other end extends out of the top of the aeration box 1. The air-gathering hood 72 is elliptical cup-shaped, with the top of the air-gathering hood 72 serving as the air inlet (at the mouth of the cup). There is a gap between the air inlet and the exhaust pipe that allows air to flow, and the air-gathering hood 72 gradually narrows from near the air inlet to away from the air inlet. The bottom of the air-gathering hood 72 has a circular sludge discharge hole 9, the cross-section of which is an inverted V-shape, meaning that the sludge discharge hole 9 gradually expands from top to bottom.

[0052] In addition, refer to Figure 2 and Figure 5The air collecting chamber 41 has a connecting block 73 for fixing the air-gathering hood 72. The connecting block 73 is integrally formed on the wall of the air collecting chamber 41, and is elongated and distributed along the height direction of the aeration box 1. The connecting block 73 and the air-gathering hood 72 are detachably connected. The air-gathering hood 72 is provided with a slider part 721, which slides and engages with the connecting block 73 along the height direction of the aeration box 1. Specifically, the connecting block 73 and the air-gathering hood 72 are connected by bolts. During installation, the slider part 721 of the air-gathering hood is slid into the connecting block 73 for quick and easy alignment, and then fixed with bolts. During disassembly, the bolts are removed, and the slider part is driven away from the connecting block to remove the air-gathering hood, thus achieving a detachable connection between the connecting block 73 and the air-gathering hood 72. In other embodiments, the connection between the connecting block 73 and the air-gathering hood 72 can be achieved by using a snap-fit ​​or pin-groove method as in the prior art.

[0053] Because the bottom of the gas collection cavity 4 is open, water will be poured into all three gas collection cavities 41 before gas is introduced. During operation, the air introduced into the gas collection cavity 41 gathers at the top. As the amount of gas introduced into the gas collection cavity 41 increases, the water in the gas collection cavity 41 is gradually discharged, and the air pressure in the gas collection cavity 41 increases. The air pressure drives the water level to gradually drop until the gas is pressed down to the lower end of the exhaust pipe 71. Under the combined action of water pressure and air pressure, an instantaneous pulse aeration is generated, and the gas is instantly discharged through the exhaust pipe 71 and released as large bubbles. At the same time, a siphon effect is formed, and water flows back into the gas collection cavity 41 and the gas gathering hood 72. By continuously repeating the above process, the intermittent exhaust forms high-energy bubbles. During the rise of the bubbles, they have a large energy to scour the membrane fibers, resulting in high energy utilization and good cleaning effect.

[0054] The air-gathering hood 72 is a structural component made of PTFE (polytetrafluoroethylene). The all-PTFE material has excellent smoothness and hydrophobicity, making it difficult for microorganisms and sludge to adhere, thus inhibiting their adhesion. This solves the problem of easy clogging of orifices in traditional aeration devices after long-term use, eliminating the need for chemical cleaning and extending its lifespan. During the increase in air pressure within the air-collecting chamber 41, sludge is ejected from the sludge discharge hole 9 by the air pressure. Simultaneously, the gradually contracting air-gathering hood 72 helps guide the internal sludge out of the sludge discharge hole 9, thereby carrying the sludge away. Furthermore, when aeration stops, sludge and heavy particles settle due to gravity, but it is difficult for them to enter the narrow inverted V-shaped slit against gravity. The inverted V-shaped sludge discharge hole 9 prevents a very small amount of settled heavy particles from entering in the reverse direction, effectively preventing pore blockage caused by particle deposition when aeration stops.

[0055] The aeration box 1, baffle 2, partition 6, air supply nozzle 5, reinforcing rib 10, reinforcing rib 11, exhaust pipe 71, and connecting block 73 are integrally injection molded from ABS (acrylonitrile-butadiene-styrene copolymer). ABS material not only has excellent physical properties, good chemical stability, and processability, but also high structural strength and durability, effectively ensuring the stability and reliability of the aeration box. Furthermore, the easy processing of ABS material reduces production costs while optimizing molding precision and overall process effects, contributing to improved equipment lifespan and economy. Combined with the bottom-open air supply chamber 3 and bottom-open air collection chamber 4, the sludge located in the air supply chamber 3 and air collection chamber 4 is discharged through gravity and air pressure during use, requiring no additional energy consumption for cleaning and making this device maintenance-free.

[0056] Additionally, refer to Figure 1 and Figure 5 The exhaust pipe 71, extending from the top of the aeration box 1, is detachably connected to a distributor 13. The distributor 13 includes at least two distributor pipes and one intake pipe; in this embodiment, four distributor pipes are provided. (Combined with...) Figure 5 The intake pipe is circular and is connected to the splitter pipe. The inner wall of the intake pipe is provided with an internal thread 14. The end of the exhaust pipe 71 that extends out of the top of the aeration box 1 is provided with an external thread 15. The external thread 15 and the internal thread 14 are compatible with each other, so that the exhaust pipe 71 is threadedly connected to the splitter 13, making the disassembly and assembly of the exhaust pipe 71 and the splitter 13 convenient and reliable.

[0057] During operation, large air bubbles discharged from exhaust pipe 71 enter the splitter 13 through the intake pipe. After being split by the splitter, they form multiple small air bubbles, which are then discharged from four different directions through the splitter pipe. These small air bubbles can achieve a uniform scrubbing effect on the membrane modules within the covered area.

[0058] It should be noted that in the prior art, the distributor 13 and the gas-gathering hood 72 are connected by bolts passing through the aeration box 1, and the high-pressure gas in the gas collection chamber 41 may leak slightly in the gaps of the bolt holes. However, in this embodiment, the gas-gathering hood 72 is connected to the connecting block 73, so that the gas in the gas collection chamber 41 can only be discharged through the exhaust pipe 71. This helps to prevent gas leakage, reduce gas loss, and ensure stable gas pressure in the gas collection chamber 41, thereby improving the efficiency of pulse aeration.

[0059] The implementation principle of this application is as follows: before the gas is introduced, the wastewater in the MBR membrane bioreactor will be injected from the bottom of the gas supply chamber 3 and the three gas collection chambers 41.

[0060] During operation, gas is introduced into the air supply chamber 3 through the air supply nozzle 5. The curved section 21 stabilizes the airflow in the air supply chamber 3, reduces resistance, and ensures even distribution. Due to buoyancy, the gas rises and, combined with the gravitational pressure and obstruction from the sewage at the bottom of the air supply chamber 3, the gas preferentially fills the top of the chamber. During continuous gas supply, the gas pressure gradually compresses it downwards until it reaches the three air distribution ports 8, ensuring that the gas is evenly distributed from the three air distribution ports 8 into the three air collection chambers 41, effectively preventing deviations in the air intake of each air collection chamber 41.

[0061] Air entering the gas collection chamber 41 accumulates at the top. As the amount of gas entering the chamber increases, water is gradually discharged, increasing the air pressure. This pressure drives the water level to gradually drop until the gas reaches the lower end of the exhaust pipe 71. The combined effect of water and air pressure creates a momentary pulse aeration, causing the gas to be instantly discharged through the exhaust pipe 71 and released as large bubbles. Simultaneously, a siphon effect is created, causing water to flow back into the gas collection chamber 41 and the gas-gathering hood 72. The large bubbles discharged from the exhaust pipe 71 enter the distributor 13 through the air inlet pipe. After being split by four distributor pipes, they form multiple small bubbles that are discharged. These small bubbles provide a uniform scrubbing effect on the membrane modules within their coverage area.

[0062] By continuously repeating the above process, intermittent exhaust forms high-energy bubbles. As the bubbles rise, they have a large energy to scour the membrane fibers, resulting in high energy utilization and good cleaning effect.

[0063] Through the functions of the air supply chamber 3, the curved section 21, and the air distribution holes, the gas delivered to each air collection chamber 41 is made more uniform, ensuring that the subsequent rinsing of the membrane fibers is uniform and effective. Furthermore, the gas in the air collection chamber 41 can only be discharged through the exhaust pipe 71, with no other tiny gaps, which helps prevent gas leakage, reduces gas loss, and ensures stable air pressure within the air collection chamber 41, thereby improving the efficiency of pulse aeration and reducing energy consumption. In addition, through the bottom-open air supply chamber 3 and the bottom-open air collection chamber 4, the sludge located in the air supply chamber 3 and the air collection chamber 4 will be discharged by gravity and air pressure during use, requiring no additional energy for cleaning. At the same time, the inverted V-shaped sludge discharge hole 9 prevents a very small amount of settled heavy particles from entering in the reverse direction, effectively preventing duct blockage caused by particle deposition when aeration stops. This makes the device maintenance-free, requiring no additional energy for sludge discharge. Example

[0064] The difference between this embodiment and Embodiment 1 is that the number of partitions is different. (Refer to...) Figure 6 and Figure 7In this embodiment, three partitions 6 are provided, arranged at intervals along the length of the aeration box 1, dividing the air collection cavity 4 into four air collection chambers 41 distributed sequentially along the length of the aeration box 1. Each of the four air collection chambers 41 is equipped with one of four aeration components 7. Four air distribution ports 8 are provided corresponding to the number of air collection chambers 41, and each of the four air distribution ports 8 connects to one of the four air collection chambers 41. Users can select an appropriate number of air collection chambers or aeration components according to their actual needs.

[0065] The difference between this embodiment and Embodiment 1 lies in the aeration components. For details, please refer to... Figure 8 and Figure 9 The aeration assembly 7 includes an exhaust pipe 71 passing through the aeration box 1 and an air-gathering hood 72 covering the bottom of the exhaust pipe 71. The exhaust pipe 71 is a long, circular pipe distributed along the height of the aeration box 1, passing through the top of the aeration box 1, such that one end of the exhaust pipe 71 is located in the air collection chamber 41, and the other end extends out of the top of the aeration box 1. The air-gathering hood 72 is elliptical cup-shaped, with the top of the air-gathering hood 72 serving as the air inlet (at the mouth of the cup). There is a gap between the air inlet and the exhaust pipe that allows air to flow, and the air-gathering hood 72 gradually narrows from near the air inlet to away from the air inlet. The bottom of the air-gathering hood 72 has a circular sludge discharge hole 9, the cross-section of which is an inverted V-shape, meaning that the sludge discharge hole 9 gradually expands from top to bottom.

[0066] In addition, refer to Figure 8 and Figure 9 The gas collecting chamber 41 has a connecting block 73 on its wall for fixing the gas-gathering hood 72. One end of the connecting block 73 is fixedly connected to the top of the aeration box 1, and the other end of the connecting block 73 extends downward into the gas-gathering hood 72. The connecting block 73 extending into the gas-gathering hood 72 is detachably connected to the gas-gathering hood 72, specifically, the connecting block 73 and the gas-gathering hood 72 are connected by bolts. In other embodiments, the connection method between the connecting block 73 and the gas-gathering hood 72 can be the snap-fit ​​or pin-groove method in the prior art. Using the method of this embodiment, the processing of the gas-gathering hood 72 can be simplified compared to Embodiment 1, and the gas-gathering hood does not need to have an additional slider part, reducing processing costs.

[0067] The difference between this embodiment and Embodiment 1 lies in the number of shunt tubes in the shunt 13. (Refer to...) Figure 6 and Figure 9 In this embodiment, the splitter 13 has six splitting pipes. During operation, large air bubbles discharged from the exhaust pipe 71 enter the splitter 13 through the intake pipe. After being split by the splitter, they form multiple small air bubbles, which are then discharged from six different directions through the splitting pipes. These small air bubbles enable a more uniform scrubbing effect on the membrane modules within the covered area.

[0068] In summary, this embodiment has more aeration components and more diversion pipes in the diverter 13, which makes the aeration coverage of the aeration device wider, and users can choose according to their actual aeration needs.

[0069] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A clog-free pulse aeration device, comprising an aeration box (1) with an open bottom, characterized in that: The aeration box (1) is provided with a baffle (2), and the baffle (2) is provided with a curved part (21). The baffle (2) divides the aeration box (1) into an air supply chamber (3) with an open bottom and an air collection chamber (4) with an open bottom. One end of the aeration box (1) is provided with an air supply nozzle (5) for connecting to an air source. One end of the air supply nozzle (5) is connected to the air supply chamber (3). The air collection chamber (4) is provided with n partitions (6). The n partitions (6) divide the air collection chamber (4) into n+1 air collection chambers (41). Each air collection chamber (41) is provided with an aeration component (7) for pulse aeration. The bottom side of the baffle (2) is provided with an air distribution port (8). A single air distribution port (8) connects a single air collection chamber (41) to the air supply chamber (3). The aeration assembly (7) includes an exhaust pipe (71) passing through the aeration box (1) and an air-gathering hood (72) covering the bottom of the exhaust pipe (71). The air-gathering hood (72) has an air inlet, and there is a gap between the air inlet and the exhaust pipe (71) for air circulation. The bottom of the air-gathering hood (72) has a sludge discharge hole (9), and the cross-section of the sludge discharge hole (9) is inverted V-shaped. The wall of the air collection chamber (41) is provided with a connecting block (73) for fixing the air-gathering hood (72), and the connecting block (73) is detachably connected to the air-gathering hood (72).

2. The non-clogging pulse aeration device according to claim 1, characterized in that: The air supply chamber (3) is provided with multiple reinforcing ribs (10); each of the air collection chambers (41) is provided with reinforcing ribs (11); the outer wall of the aeration box (1) is provided with reinforcing ribs (12).

3. The non-clogging pulse aeration device according to claim 1, characterized in that: The gas-gathering hood (72) is cup-shaped, with the top of the gas-gathering hood (72) serving as an air inlet, and the gas-gathering hood (72) gradually contracts from near the air inlet to away from the air inlet.

4. The non-clogging pulse aeration device according to claim 1, characterized in that: The connecting block (73) is integrally formed on the wall of the gas collecting cavity (41). The gas collecting cover (72) is provided with a slider part (721). The slider part (721) and the connecting block (73) slide and cooperate with each other. The connecting block (73) and the gas collecting cover (72) are detachably connected.

5. The non-clogging pulse aeration device according to claim 1, characterized in that: One end of the connecting block extends into the gas-gathering hood (72), and the connecting block (73) extending to one end of the gas-gathering hood (72) is detachably connected to the gas-gathering hood (72).

6. A non-clogging pulse aeration device according to claim 1, 4 or 5, characterized in that: The connecting block (73) is connected to the gas-gathering cover (72) by bolts, clips or pins.

7. The non-clogging pulse aeration device according to claim 1, characterized in that: The gas-gathering hood (72) is a structural component made of PTFE material.

8. A non-clogging pulse aeration device according to claim 2, characterized in that: The aeration box (1), baffle (2), partition (6), air supply nozzle (5), reinforcing rib (10), reinforcing rib (11), exhaust pipe (71) and connecting block (73) are integrally injection molded from ABS material.

9. A non-clogging pulse aeration device according to claim 1, characterized in that: The exhaust pipe (71) extends out of the aeration box (1) and is detachably connected to a distributor (13).

10. A non-clogging pulse aeration device according to claim 9, characterized in that: The diverter (13) includes at least two diverter pipes and an air inlet pipe. The inner wall of the air inlet pipe is provided with an internal thread (14). The end of the exhaust pipe (71) extending out of the top of the aeration box (1) is provided with an external thread (15). The external thread (15) and the internal thread (14) are adapted to each other.

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