Large-bubble pulse aeration device

Abstract

The utility model relates to a large-bubble pulse aeration device which is characterized by comprising a shell, the shell comprises a front side plate, a rear side plate, a left side plate, a right side plate and a top plate, and the bottom of the shell is open; the air inlet groove is in sliding connection with the shell and is a rectangular groove with an opening in the lower end, an air inlet pipe is arranged at one end of the air inlet groove, and an air outlet hole is formed in the side face of the air inlet groove; the gas collecting chamber is fixed on a top plate of the shell and extends towards an inner cavity of the shell, and a gas inlet notch is formed in the top surface of the gas collecting chamber; the gas distribution channel is arranged on a top plate of the shell, the gas distribution channel and the gas collection chamber are correspondingly arranged, and a gap is formed between the bottom of the gas distribution channel and the bottom of the gas collection chamber; and the disperser is arranged on the outer side surface of the top plate of the shell and is communicated with a gas path of the gas distribution channel.

Description

Technical Field

[0001] This utility model relates to the field of membrane bioreactor operation and maintenance, and more specifically to a large bubble pulse aeration device. Background Technology

[0002] During the operation of a membrane bioreactor (MBR), contaminants accumulate on the surface of the membrane fibers, affecting the filtration efficiency. To reduce surface fouling, aeration scrubbing is the most widely used method. It relies on the impact of airflow to remove contaminants from the membrane fiber surface, thus cleaning it. In MBRs, aeration scrubbing is primarily achieved through aeration devices. Traditional aeration devices include aeration fans and aeration pipes with aeration holes. Airflow passes through these holes and impacts the membrane fibers. However, this aeration method typically involves relatively low airflow and limited impact force, resulting in incomplete cleaning of the contaminants from the membrane fiber surface. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a large bubble pulse aeration device, the technical solution of which is: a large bubble pulse aeration device, characterized in that it includes:

[0004] The housing includes a front side plate, a rear side plate, a left side plate, a right side plate, and a top plate, with an open bottom. An air inlet slot is slidably connected to the housing; the air inlet slot is a rectangular slot with an open bottom, an air inlet pipe is provided at one end of the air inlet slot, and an air outlet is provided on the side of the air inlet slot. An air collecting chamber is fixed to the top plate of the housing and extends into the internal cavity of the housing; the top surface of the air collecting chamber has an air inlet notch. An air distribution channel is placed on the top plate of the housing, corresponding to the air collecting chamber, with a gap between the bottom of the air distribution channel and the bottom of the air collecting chamber. A diffuser is placed on the outer side of the top plate of the housing and communicates with the air distribution channel.

[0005] A further technical feature of this utility model is:

[0006] The gap between the bottom of the gas distribution channel and the bottom of the gas collection chamber is 5mm-10mm.

[0007] The air intake slot is provided with a slide rail, and the left and right side plates of the housing are provided with openings that match the air intake slot. The openings are also provided with slide grooves that match the slide rails.

[0008] The shell, air inlet slot, air collection chamber, air distribution channel, and diffuser are an integral structure.

[0009] The air outlets on the side of the air inlet slot are on the same horizontal plane.

[0010] Overflow holes are provided below the front and rear side plates of the housing.

[0011] The beneficial effects of this invention are as follows: Because the gas collecting chamber has an inlet at the top and is closed on all sides and at the bottom, gas enters the top of the gas collecting chamber through the inlet and gradually accumulates and compresses. The increasing amount of gas causes the gas-liquid interface to gradually move downwards until the gas enters the gas distribution channel. Once inside the distribution channel, a siphon effect is formed, allowing the gas to quickly reach the disperser and form large bubbles that scour the membrane fibers in the membrane module. The siphon effect also causes liquid to rush into the gas collecting chamber rapidly. This repeated process forms pulse-like large bubbles that scrub the membrane fibers. The bursting of these large bubbles causes localized turbulence in the fluid, creating shear force and disturbance on the membrane fiber surface. The larger the bubble volume, the greater the impact force, thus achieving a better scouring effect on the membrane fibers. Furthermore, the structure of the gas collecting chamber ensures that the gas pressure reaching the distribution channel is essentially the same, preventing uneven gas distribution. Attached Figure Description

[0012] The structure of this utility model, as well as its further objectives and advantages, will be better understood from the following description taken in conjunction with the accompanying drawings, wherein like reference numerals identify like elements:

[0013] Figure 1 This is an exploded view of an embodiment of the present invention;

[0014] Figure 2 yes Figure 1 The front view of the embodiment shown;

[0015] Figure 3 yes Figure 1 A cross-sectional view of the embodiment shown. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] Reference Figures 1 to 3In this embodiment, a large bubble pulse aeration device is characterized by comprising: a housing 1, the housing including a front side plate, a rear side plate, a left side plate, a right side plate and a top plate, the bottom of the housing 1 being open; an air inlet groove 2 slidably connected to the housing 1, the air inlet groove being a rectangular groove with an open bottom, one end of the air inlet groove being provided with an air inlet pipe 21, and an air outlet hole 22 being provided on the side of the air inlet groove; an air collecting chamber 3 fixed to the top plate of the housing extending into the internal cavity of the housing, the top surface of the air collecting chamber being provided with an air inlet notch 31; an air distribution channel 4 placed on the top plate of the housing, the air distribution channel 4 and the air collecting chamber 3 being correspondingly arranged, and there being a gap between the bottom of the air distribution channel 4 and the bottom of the air collecting chamber 3; and a disperser 5 placed on the outer side of the top plate of the housing and communicating with the air distribution channel 4. In this embodiment, the gap between the bottom of the gas distribution channel and the bottom of the gas collection chamber is 5mm-10mm; a slide rail 23 is provided on the air inlet slot 2, and openings 11 matching the air inlet slot are provided on the left and right side plates of the housing, and a slide groove 12 matching the slide rail is also provided at the opening; the air outlet 22 on the side of the air inlet slot 2 is on the same horizontal plane; overflow holes 6 are provided below the front and rear side plates of the housing.

[0018] Because the gas collecting chamber 3 has an air inlet 31 at the top and is closed around the sides and bottom, the gas enters the top of the gas collecting chamber through the air inlet 31 and gradually gathers and compresses. The increasing amount of gas causes the gas-liquid interface to gradually move downwards until the gas enters the gas distribution channel. After entering the gas distribution channel, the gas forms a siphon effect, which allows the gas to quickly reach the disperser 5 and form large bubbles to scour the membrane fibers in the membrane module. The occurrence of the siphon effect also causes the liquid to rush into the gas collecting chamber 3 quickly. This process is repeated to form pulse-like large bubbles that scrub the membrane fibers. The bursting of these large bubbles will cause local turbulence in the fluid, forming shear force and disturbance force on the surface of the membrane fibers. The larger the volume of the bubble, the greater the impact force, which can achieve a better scouring effect on the membrane fibers. Moreover, the structure of the gas collecting chamber ensures that the gas pressure reaching the gas distribution channel is basically the same, and there will be no uneven gas distribution.

[0019] In addition, a slide rail 23 is provided on the air inlet groove 2, and openings 11 matching the air inlet groove 2 are provided on the left and right side plates of the housing 1. A sliding groove 12 matching the slide rail 23 is also provided at the opening 11. This structure facilitates installation. The lower end of the air inlet groove 2 is open, which overcomes the problem of mud accumulation and blockage in the perforated pipe. The air outlets 22 on the side of the air inlet groove 2 are on the same horizontal plane. Gas enters from the air inlet pipe 21 and gathers and compresses at the top of the air inlet groove 2. When the gas-liquid interface reaches the position of the air outlet 22, the gas pressure at the air outlet is basically the same, realizing the uniform distribution of gas by the air inlet groove 2. Overflow holes 6 are provided below the front and rear side plates of the housing. When the gas distribution channel is blocked, the gas fills the internal cavity of the housing and reaches the overflow hole 6, where it is uniformly aerated.

[0020] In practical applications, the shell 1, air inlet groove 2, air collection chamber 3, air distribution channel 4, and disperser 5 can also be an integral structure, integrally molded with materials such as ABS and polyvinyl chloride, which has the advantages of easy molding, high strength, and corrosion resistance, making it more suitable for sewage treatment.

[0021] The technical content and features of this utility model have been disclosed above. However, it is understood that, under the inventive concept of this utility model, those skilled in the art can make various changes and improvements to the above structure, including combinations of the technical features disclosed or claimed herein, as well as other combinations that explicitly include these features. All such modifications and / or combinations fall within the technical field to which this utility model pertains and are within the protection scope of the claims of this utility model.

Claims

1. A large bubble pulse aeration device, characterized in that The utility model relates to a kind of air distribution device, including: Shell, the shell includes front side plate, rear side plate, left side plate, right side plate and top plate, the shell bottom is open type; With the air inlet groove of shell sliding connection, the air inlet groove is the rectangular slot of lower end opening, and the air inlet groove is provided with air inlet pipe in one end, and air outlet hole is opened in the side of air inlet groove; Fixed on the top plate of shell and extended to the cavity of shell inside the gas collection chamber, the top surface of gas collection chamber is provided with air intake gap; Gas distribution channel is placed on the top plate of shell, the gas distribution channel and the gas collection chamber are correspondingly provided, and there is gap between the bottom of gas distribution channel and the bottom of gas collection chamber; The disperser of gas distribution channel gas path conduction is placed on the outside of the top plate of shell.

2. The large bubble pulse aeration device of claim 1, wherein: The gap between the bottom of gas distribution channel and the bottom of gas collection chamber is 5mm-10mm.

3. The large bubble pulse aeration device of claim 1, wherein: Air inlet groove is provided with slide rail, the left side plate and the right side plate of shell are provided with the opening matched with air inlet groove, and the opening is also provided with the slide groove matched with the slide rail.

4. The large bubble pulse aeration device of claim 1, wherein: The shell, air inlet groove, gas collection chamber, gas distribution channel and disperser are integrated structure.

5. The large bubble pulse aeration device of claim 1, wherein: The air outlet hole in the side of air inlet groove is in the same horizontal plane.

6. An apparatus according to claim 1 or claim 2 or claim 3 or claim 4 or claim 5 wherein: Overflow hole is arranged below the front side plate and the rear side plate of shell.

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