Aeration device and membrane bioreactor
By adopting the uniform air supply structure of the aeration device and the water sealing box design in the membrane bioreactor, the problems of high aeration energy consumption and uneven air output of the perforated pipe are solved, and the efficient operation and good cleaning effect of the membrane bioreactor are achieved.
Patent Information
- Application Number
- CN202421909662.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-07
AI Technical Summary
In the prior art, the perforated tube aeration device has high energy consumption, poor membrane cleaning effect, and uneven air output, resulting in difficult operation and maintenance of the membrane bioreactor.
An aeration device is adopted, including an aeration box, an aeration assembly and an air supply assembly. The gas is evenly distributed to each aeration chamber through a divided air supply structure, ensuring that each aeration chamber is independently aerated, avoiding the phenomenon of air series, combining the water sealing box and the partitioning member to prevent blockage, and achieving uniform aeration.
It achieves uniform aeration and good membrane cleaning effect, ensuring long-term and efficient operation of membrane bioreactors, reducing energy consumption and reducing maintenance difficulties.
Smart Images
Figure CN223074011U_ABST
Abstract
Description
Technical Field
[0001] This application is used in the technical field of membrane bioreactors, and particularly relates to an aeration device and a membrane bioreactor. Background Art
[0002] A membrane bioreactor (MBR, Membrane Bio-Reactor) is a new type of sewage treatment technology that organically combines ultrafiltration or microfiltration membrane separation technology with biological treatment technology, and is widely used in municipal and industrial sewage treatment and reuse. During the operation and maintenance of a membrane bioreactor, effective control of membrane fouling can ensure the long-term and efficient operation of the membrane bioreactor. Therefore, the membrane module is usually flushed by means of aeration cleaning to control membrane fouling.
[0003] The traditional MBR aeration form is continuous aeration, that is, perforated pipe aeration is used. However, perforated pipe aeration has high energy consumption, poor membrane cleaning effect, and defects such as the perforated pipe is extremely easy to be blocked by the settled sludge. Even if the perforated pipe is not blocked, because the perforated pipe is provided with small holes of the same specification in sequence on a long pipeline, due to different along-path and local losses, the outflow pressure of each orifice is different, resulting in uneven air output. Therefore, it is difficult to maintain the perforated pipe aeration, and the scale is limited.
[0004] In recent years, the continuous aeration method has gradually been replaced by the intermittent aeration method, but the air output of this aeration method is still uneven. Utility Model Content
[0005] The purpose of this application is to solve at least one of the technical problems existing in the prior art, and provide an aeration device and a membrane bioreactor. Among them, the air output of the aeration device is uniform, and the membrane bioreactor using this aeration device can operate efficiently for a long time.
[0006] The technical solution adopted by this application to solve its technical problems is:
[0007] An aeration device, comprising
[0008] An aeration box, in which an aeration chamber is provided;
[0009] An aeration component, which is located in the aeration chamber;
[0010] A gas supply component, on which a total intake channel is provided. A first intake channel and a second intake channel are provided in the gas supply component. A gas guiding groove corresponding to the aeration box is provided on the gas supply component. The first intake channel and the second intake channel are both communicated with the total intake channel. One end of the gas guiding groove is communicated with the aeration chamber, and the other end is communicated with the first intake channel or the second intake channel.
[0011] In some embodiments of the present application, the aeration assembly includes a water-sealing box and an air outlet pipe. The water-sealing box is located in the aeration chamber. The top of the water-sealing box is provided with a first opening. The bottom end of the air outlet pipe extends into the water-sealing box through the first opening, and the top end of the air outlet pipe extends outside the aeration box.
[0012] In some embodiments of the present application, a plurality of the aeration chambers are provided in the aeration box. The aeration assembly is provided in each of the aeration chambers, and each aeration chamber is communicated with a gas guide groove.
[0013] In some embodiments of the present application, a second opening is provided at the bottom of the aeration chamber. A plurality of partition members are provided in the aeration box. The partition members extend from the inner top surface of the aeration box towards the second opening, and the partition members are provided between adjacent aeration chambers.
[0014] In some embodiments of the present application, the aeration box, the partition members and the air outlet pipe are integrally formed.
[0015] In some embodiments of the present application, an open space is formed between the top of the water-sealing box and the inner top surface of the aeration box. The top of the water-sealing box is provided with a first fixing member, and the first fixing member is fixedly connected to the inner top surface of the aeration box.
[0016] In some embodiments of the present application, the bottom of the water-sealing box is provided with water-permeable holes.
[0017] In some embodiments of the present application, an air distribution box is provided at the top of the aeration box. An air outlet is provided on the air distribution box. A plurality of air distribution grooves are provided in the air distribution box. The plurality of air distribution grooves are arranged in a divergent manner with the air outlet as the center. An air outlet channel is formed between adjacent air distribution grooves. The inner end of the air outlet channel is communicated with the air outlet, and the outer end of the air outlet channel extends outwards to form a branched air outlet.
[0018] In some embodiments of the present application, the air supply assembly is provided at the bottom of the aeration box. The cross-sections of the first air inlet channel and the second air inlet channel gradually decrease along the air outlet direction, and the first air inlet channel and the second air inlet channel are arranged in parallel.
[0019] The present application further provides a membrane bioreactor, which includes a reactor body and the aeration device in the above embodiments. The reactor body includes a membrane frame and a filter membrane. The filter membrane is located above the aeration box. A second fixing member is provided at the top end of the aeration box, and the second fixing member is connected to the membrane frame.
[0020] At least one of the technical solutions in the above technical solutions has the following advantages or beneficial effects: The aeration component of the aeration device can achieve aeration. The external air supply device allows gas to enter the air supply component through the total air inlet channel of the air supply component. The gas entering the total air inlet channel is divided into two parts and enters the first air inlet channel and the second air inlet channel, that is, the gas is evenly distributed to the first air inlet channel and the second air inlet channel, making the air distribution structure uniform. The air guide groove is correspondingly arranged with the aeration cavity, so that the gas in the first air inlet channel or the second air inlet channel enters the aeration cavity through the air guide groove, realizing one-to-one air supply. As the gas accumulates in the aeration cavity, the gas gradually presses down from the top of the aeration cavity into the water level of the aeration cavity and the water flow in the aeration component until aeration is formed in the aeration component. This aeration device avoids uneven air distribution through a two-way air supply structure, can ensure uniform aeration and no air leakage, and is applied to a membrane bioreactor with good membrane cleaning effect.
[0021] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0023] Figure 1 is an exploded view of an embodiment of the aeration device of the present application;
[0024] Figure 2 is a cross-sectional view of an embodiment of the air supply component in the present application;
[0025] Figure 3 is a perspective view of an embodiment of the air distribution box in the present application;
[0026] Figure 4 is a perspective view of an embodiment of the bioreactor in the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] This part will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to visually and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the protection scope of the present application.
[0028] In the present application, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of the present application, rather than indicating or implying that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0029] In this application, the meaning of "several" is one or more, the meaning of "multiple" is more than two, and expressions such as "greater than", "less than", and "exceeding" are understood not to include the recited number; expressions such as "above", "below", and "within" are understood to include the recited number. In the description of this application, if "first" and "second" are described, they are only used to distinguish technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.
[0030] In this application, unless otherwise clearly defined, terms such as "arranged", "installed", and "connected" should be understood in a broad sense. For example, they can be directly connected, or indirectly connected through an intermediate medium; they can be fixedly connected, or detachably connected, or integrally formed; they can be mechanically connected, or electrically connected or capable of communicating with each other; they can be the communication inside two components or the interaction relationship between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this application in combination with the specific content of the technical solution.
[0031] Among them, Figure 3 and Figure 4 give the reference direction coordinate system of the embodiments of this application. The following will describe the embodiments of this application in combination with the directions shown in Figure 3 and Figure 4 shown.
[0032] The embodiments of this application provide an aeration device. Referring to Figures 1 to 4 , it includes an aeration box 100, and an aeration chamber 110 is provided inside the aeration box 100;
[0033] An aeration assembly 200, and the aeration assembly 200 is located in the aeration chamber 110;
[0034] A gas supply assembly 300, a total air inlet channel 310 is provided on the gas supply assembly 300, a first air inlet channel 320 and a second air inlet channel 330 are provided inside the gas supply assembly 300, a gas guiding groove 340 corresponding to the aeration box 100 is provided on the gas supply assembly 300, both the first air inlet channel 320 and the second air inlet channel 330 are communicated with the total air inlet channel 310, one end of the gas guiding groove 340 is communicated with the aeration chamber 110, and the other end is communicated with the first air inlet channel 320 or the second air inlet channel 330.
[0035] The aeration component of the aeration device can achieve aeration. The external air supply equipment enables gas to enter the air supply component 300 through the total air inlet channel 310 of the air supply component 300. The gas entering the total air inlet channel 310 is divided into two parts and enters the first air inlet channel 320 and the second air inlet channel 330, that is, the gas is evenly distributed into the first air inlet channel 320 and the second air inlet channel 330, making the air distribution structure uniform. The air guide groove 340 is correspondingly arranged with the aeration chamber 110, so that the gas in the first air inlet channel 320 or the second air inlet channel 330 enters the aeration chamber 110 through the air guide groove 340, realizing one-to-one air supply. As the gas accumulates in the aeration chamber 110, the gas gradually presses down from the top of the aeration chamber 110 to fill the water level in the aeration chamber 110 and the aeration component 200 until aeration is formed in the aeration component 200. The aeration device avoids uneven air distribution through the two-way air supply structure, can ensure uniform aeration and no air leakage, is applied to the membrane bioreactor, has a good membrane cleaning effect, and ensures the long-term and efficient operation of the membrane bioreactor.
[0036] In some embodiments, the aeration component 200 includes a water sealing box 210 and an air outlet pipe 220. The water sealing box 210 is located in the aeration chamber 110. A first opening 211 is provided at the top of the water sealing box 210. The bottom end of the air outlet pipe 220 extends into the water sealing box 210 through the first opening 211, and the top end of the air outlet pipe 220 extends to the outside of the aeration box 100. In other words, the first opening 211 at the top of the water sealing box 210 is directly opposite to the top position of the aeration chamber 110. The air outlet pipe 220 is vertically inserted into the water sealing box 210 at a predetermined depth, and the top opening of the air outlet pipe 220 penetrates through the body of the aeration box 100. As the gas accumulates in the aeration chamber 110, the gas gradually presses down from the top of the aeration chamber 110 to fill the water level in the aeration chamber 110 and the water sealing box 210 until the bottom opening of the air outlet pipe 220, and the gas is discharged through the top opening of the air outlet pipe 220 through the air outlet pipe 220 to form aeration.
[0037] A plurality of aeration chambers 110 are provided in the aeration box 100, and an aeration component 200 is provided in each aeration chamber 110. Each aeration chamber 110 is communicated with an air guide groove 340. In other words, the aeration component 200 corresponds to the aeration chamber 110 one by one, and the number of air guide grooves 340 corresponds to the number of aeration chambers 110 one by one. The air outlet end of the air guide groove 340 has a groove-shaped outlet, and the gas is supplied to the aeration chamber 110 through the groove-shaped outlet. The groove-shaped outlet has a large area, effectively preventing the perforated pipe from being easily blocked, which may lead to the defect of sludge accumulation. The one-to-one corresponding structure makes each structure not interfere with each other, avoiding the defect that the aeration frequencies of adjacent aeration chambers 110 are inconsistent due to air leakage and mutual interference.
[0038] The air guide grooves 340 are all arranged in parallel, effectively preventing the pressure imbalance caused by the series design, thus avoiding the phenomenon of uneven aeration.
[0039] A second opening is provided at the bottom of the aeration chamber 110. A plurality of partition members 120 are provided in the aeration box 100. The partition members 120 extend from the inner top surface of the aeration box 100 towards the second opening. Partition members 120 are provided between adjacent aeration chambers 110. In other words, the partition members 120 divide the aeration box 100 into several aeration chambers 110. The partition members 120 are partition plates.
[0040] The outer surface and the inner partition plate that form the total intake passage 310 in the air supply assembly 300 are both designed to be streamlined, which is beneficial to reducing the pressure loss of the gas during the flow process.
[0041] In some embodiments, the aeration box 100, the partition members 120 and the air outlet pipe 220 are integrally formed, reducing problems such as structural instability, poor sealing and cumbersome operation caused by the assembly process of the aeration device.
[0042] In some embodiments, an open space 212 is formed between the top of the water sealing box 210 and the inner top surface of the aeration box 100. The gas in the aeration chamber 110 can enter the water sealing box 210 through the open space 212. That is, there is a predetermined distance between the first opening 211 at the top of the water sealing box 210 and the top of the aeration chamber 110 to divert the gas in the aeration chamber 110 into the water sealing box 210. The top of the water sealing box 210 is provided with a first fixing member, and the first fixing member is fixedly connected to the inner top surface of the aeration box 100 to improve the overall stability of the aeration device.
[0043] The bottom of the water sealing box 210 is provided with water permeable holes 213. It can be understood that the lower end of the water sealing box 210 is closed, and only the water permeable holes 213 are provided. The water permeable holes 213 communicate with the aeration chamber 110 and the water sealing box 210 and are used for discharging or supplementing liquid.
[0044] It can be understood that when the water level in the aeration chamber 110 submerges the first opening 211 of the water sealing box 210, the sludge in the sewage can enter the aeration chamber 110 through the first opening 211 and the water permeable holes 213 of the water sealing box 210. And when the water level in the aeration chamber 110 is lower than the first opening 211 of the water sealing box 210 and aeration has not started yet, since the bottom of the water sealing box 210 is provided with water permeable holes 213, the sludge in the sewage can still enter the aeration chamber 110 through the water permeable holes 213. In this way, the sludge is not likely to deposit in the water sealing box 210, thereby preventing the bottom opening of the air outlet pipe 220 from being blocked by the sludge and unable to aerate.
[0045] The top of the aeration box 100 is provided with a gas distribution box 400, that is, the gas distribution box 400 is arranged on the outer top surface of the aeration box 100 above the air outlet 410. The gas distribution box 400 is provided with an air outlet 410. A plurality of gas distribution grooves 420 are arranged in the gas distribution box 400. The plurality of gas distribution grooves 420 are divergently arranged with the air outlet 410 as the center. An air outlet channel 421 is formed between adjacent gas distribution grooves 420. The inner end of the air outlet channel 421 is communicated with the air outlet 410. The outer end of the air outlet channel 421 extends outwards to form a branched air outlet. That is, one end of the gas distribution groove 420 is located at the air outlet 410 in the middle of the gas distribution box 400, and the other end extends towards the outer side wall of the gas distribution box 400 and forms a gas distribution outlet on the outer side wall of the gas distributor. The setting of the gas distribution box 400 can make the aeration more uniform, and the outlet is arranged on the side to avoid the gas directly impacting the membrane filaments.
[0046] In some embodiments, the air supply assembly 300 is arranged at the bottom of the aeration box 100, which can ensure that the gas collection volume of the aeration chamber 110 is used to the maximum limit without wasting space, thereby saving costs. The cross sections of the first air inlet channel 320 and the second air inlet channel 330 gradually decrease along the air outlet direction. The first air inlet channel 320 and the second air inlet channel 330 are arranged in parallel. Such a design is beneficial to ensure the uniformity of gas distribution in the two gas channels (the first air inlet channel 320 and the second air inlet channel 330).
[0047] A membrane bioreactor, characterized in that it includes a reactor body and the aeration device in the above embodiments. The reactor body 500 includes a membrane frame 510 and a filter membrane 520. The filter membrane 520 is located above the aeration box 100 to scrub the filter membrane 520 when the aeration device aerates. The top end of the aeration box 100 is provided with a second fixing member 130. The second fixing member 130 is connected to the membrane frame to make the aeration box 100 firmly connected to the reactor body 500. The fixed end of the air supply assembly 300 is provided with an O-ring to prevent rotation and shock, and is inserted into the second fixing member 130. The outer surface of the air supply assembly 300 tightly fits on the inner surface of the aeration box 100 and is fixed by bolts or bonding or other forms.
[0048] The aeration box 100 adopts the form of integral molding with a small number of bolts, without bonding, with a reliable structure and simple installation.
[0049] The air supply assembly 300 includes a matching upper cover body and a lower cover body, a total air inlet channel 310. The first air inlet channel 320 and the second air inlet channel 330 are formed between the upper cover body and the lower cover body.
[0050] In the description of this specification, the descriptions referring to terms such as "example", "embodiment", or "some embodiments" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0051] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can also make equivalent deformations or substitutions without departing from the spirit of the present application, and these equivalent deformations or substitutions are all included within the scope defined by the claims of the present application.
Claims
1. An aeration device, characterized in that, including an aeration box, within which an aeration chamber is provided; an aeration assembly, which is located in the aeration chamber; a gas supply assembly, on which a main air inlet passage is provided, within which a first air inlet passage and a second air inlet passage are provided, on which a gas guiding groove corresponding to the aeration box is provided, both the first air inlet passage and the second air inlet passage are communicated with the main air inlet passage, one end of the gas guiding groove is communicated with the aeration chamber, and the other end is communicated with the first air inlet passage or the second air inlet passage.
2. The aeration device according to claim 1, characterized in that, The aeration assembly includes a water sealing box and an air outlet pipe, the water sealing box is located in the aeration chamber, a first opening is provided at the top of the water sealing box, the bottom end of the air outlet pipe extends into the water sealing box through the first opening, and the top end of the air outlet pipe extends to the outside of the aeration box.
3. The aeration device according to claim 2, characterized in that, A plurality of the aeration chambers are provided in the aeration box, the aeration assembly is provided in each of the aeration chambers, and each of the aeration chambers is communicated with the gas guiding groove.
4. The aeration device according to claim 3, characterized in that, A second opening is provided at the bottom of the aeration chamber, a plurality of partition members are provided in the aeration box, the partition members extend from the inner top surface of the aeration box towards the second opening, and the partition members are provided between adjacent aeration chambers.
5. The aeration device according to claim 4, characterized in that, The aeration box, the partition members and the air outlet pipe are integrally formed.
6. The aeration device according to claim 2, characterized in that, An open space is formed between the top of the water sealing box and the inner top surface of the aeration box, a first fixing member is provided at the top of the water sealing box, and the first fixing member is fixedly connected with the inner top surface of the aeration box.
7. The aeration device according to claim 6, characterized in that, The bottom of the water sealing box is provided with water permeable holes.
8. The aeration device according to claim 2, characterized in that, A gas distribution box is provided at the top of the aeration box, an air outlet is provided on the gas distribution box, a plurality of gas distribution grooves are provided in the gas distribution box, the plurality of gas distribution grooves are arranged in a divergent manner with the air outlet as the center, an air outlet passage is formed between adjacent gas distribution grooves, the inner end of the air outlet passage is communicated with the air outlet, and the outer end of the air outlet passage extends outwards to form a branched air outlet.
9. The aeration device according to claim 1, characterized in that, The gas supply assembly is provided at the bottom of the aeration box, the cross sections of the first air inlet passage and the second air inlet passage gradually decrease along the air outlet direction, and the first air inlet passage and the second air inlet passage are arranged in parallel.
10. A membrane bioreactor, characterized in that, including a reactor body and the aeration device according to any one of claims 1 to 9, the reactor body includes a membrane frame and a filter membrane, the filter membrane is located above the aeration box, and a second fixing member is provided at the top end of the aeration box, and the second fixing member is connected with the membrane frame.