A rocking membrane bioreactor

Abstract

The utility model discloses a swing formula membrane bioreactor, including membrane fan, aeration assembly, set up in the membrane pool a plurality of rotating swing frame, a plurality of MABR membrane assemblies, a plurality of swing assembly and drive arrangement, the MABR membrane assembly is installed on rotating swing frame, swing assembly with rotating swing frame swing connection, through drive arrangement makes rotating swing frame through swing assembly and reciprocating operation, MABR membrane assembly in the angle cyclic variation of swing process with sewage flow direction, sludge flow direction, aeration flow direction, drive arrangement is set up on the pulse exhaust cavity of rotating swing frame. The utility model discloses simple structure design, convenient, fast and easy to disassemble and maintain, the adjustment flexibility of movement structure is high, and the supporting equipment is less, and it is unnecessary to increase the supporting equipment such as baffle or partition to ensure the full contact of membrane and water flow, reduces the dead zone, and the manufacturing cost is low, the main swing connecting structure is all above the water surface, and the service life is long.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and relates to bioreactors, and more particularly to a swing membrane bioreactor that saves operating energy consumption, is easy to disassemble and maintain, has high adjustment flexibility, and has a long service life. Background Technology

[0002] With the acceleration of industrialization and urbanization, water pollution has become increasingly serious, and the continuous improvement of wastewater treatment technology has become an important direction for environmental protection. Traditional biological treatment processes, such as activated sludge processes and biological filters, have played an important role in wastewater purification, but they have shortcomings such as high energy consumption, large land area requirements, and limited nitrogen removal efficiency.

[0003] In recent years, the combination of membrane technology and biological treatment technology has provided new solutions for wastewater treatment. The membrane bioreactor (MABR) is a new energy-saving and consumption-reducing technology. Based on a permeable membrane, MABR provides gaseous substrates to a biofilm formed on the outside of the membrane. Because oxygen and pollutants enter the biofilm from opposite sides, the microorganisms within the MABR biofilm have a unique colony structure; different layers of microorganisms have different pollutant treatment capabilities. A thicker biofilm on the membrane surface helps increase its loading capacity, but at the same time, it makes it more difficult for pollutants to penetrate the biofilm layer. Therefore, improving the mass transfer capacity of pollutants on the membrane surface is key to improving MABR membrane performance.

[0004] Currently, intermittent aeration is generally used to promote water flow within the membrane module and improve mass transfer capacity. However, this requires a high instantaneous air volume, and in order to reduce energy consumption, it can only be flushed at a low frequency. This results in a long mass transfer window period within the membrane module. Furthermore, once a biofilm grows on the membrane surface, membrane fibers are prone to adhesion, and short-circuiting between the air bubbles and water flow generated by aeration is very likely to occur. The low flushing frequency can also lead to sludge sedimentation, causing sludge stratification within the membrane tank and affecting the overall performance of the membrane module. Since the biofilm has a non-smooth surface, traditional aeration flushing or unidirectional water flow makes it difficult to reach all the uneven areas of the biofilm, making it difficult to achieve the ideal wastewater treatment effect.

[0005] A common solution is to make the membrane frame movable, including reciprocating movement, up-and-down movement, or rotation. However, this type of movable membrane frame often has problems such as requiring external power drive equipment, resulting in high energy consumption; complex structural design, making installation, disassembly, and maintenance difficult; small vibration amplitude and low degree of freedom of control; easy corrosion and damage of moving parts in sewage; and easy adhesion and blockage of drive rods or slide rails by sludge, causing moving parts to be unable to move. Utility Model Content

[0006] To address the problems of existing membrane frames requiring external drive equipment, resulting in high energy consumption; complex structural design, difficult installation, disassembly, and maintenance; small vibration amplitude; low degree of control freedom; and easy corrosion and damage of moving parts in wastewater, this invention first provides a swing-type membrane bioreactor. This invention features a simple motion structure design, convenient and quick installation, disassembly, and maintenance; high flexibility in motion structure adjustment; fewer supporting equipment for the MABR swing membrane frame, reducing manufacturing costs; the main swing connection structures are all above the water surface, resulting in a long service life; the swing structure has less wear and tear on connecting parts compared to other reciprocating structures, while avoiding jamming; start-stop control is simple, requiring only changes in the amount of gas in the exhaust gas inlet drive device to achieve vibration, static, and high-frequency / low-frequency vibration of the MABR membrane module; the movement of the membrane stacks is relatively flexible, and the running trajectories of the two membrane stacks can be the same or relative.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a swing-type membrane bioreactor, including a membrane blower, several rotating swing frames disposed in a membrane tank, several MABR membrane modules, several swing components, and a drive device. The MABR membrane modules are mounted on the rotating swing frames, and the swing components are movably connected to the rotating swing frames. The driving device enables the rotating swing frames to reciprocate through the swing components. The drive device is a pulse exhaust chamber disposed on the rotating swing frames.

[0008] In a preferred embodiment of this utility model, the swing assembly includes a fixed beam, a support rod, and a connecting rod. Each end of the support rod is provided with a rotating shaft. The fixed beam and the connecting rod are movably connected through the rotating shafts on the support rods. The upper part of the rotating swing frame is connected to the support rods through the connecting rods.

[0009] In a preferred embodiment of this utility model, the number of support rods is ≥2.

[0010] In a preferred embodiment of this utility model, the support rods are of the same length and are arranged in parallel.

[0011] As a preferred embodiment of this utility model, the MABR membrane module is a non-porous, oxygen-permeable hollow fiber membrane filament with a biofilm attached to the outside of the filament.

[0012] In a preferred embodiment of this utility model, the fixed beam and the support rod are located above the water surface.

[0013] In a preferred embodiment of this invention, the exhaust gas outlet of the MABR membrane module is connected to the pulse exhaust chamber.

[0014] As a preferred embodiment of this utility model, it also includes pulse aeration boxes disposed below the rotating swing frame, with the same number of pulse aeration boxes under each rotating swing frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1) The motion structure of this utility model is simple in design, and easy and quick to disassemble and maintain; the motion structure has high flexibility of adjustment, and the motion amplitude can be adjusted; the MABR swing membrane frame has few supporting equipment, and there is no need to add supporting equipment such as folding plates or partitions to ensure full contact between the membrane and the water flow, reducing dead zones and reducing manufacturing costs; the main swing components are all above the water surface, resulting in a long service life; compared with other reciprocating structures (external power drive structures), the wear and tear of the connecting parts of the swing components is small, and the jamming phenomenon is avoided (external power drive structures often run continuously, and jamming will lead to motor overload, equipment shutdown, difficult and time-consuming maintenance).

[0016] 2) The start-stop control of this utility model is simple. It only requires changing the amount of air in the exhaust gas inlet drive device to realize the vibration, static, high frequency / low frequency vibration of the MABR membrane module. The process is simple and the requirements for operation and maintenance are low.

[0017] 3) This invention promotes the contact between pollutants in wastewater and the MABR membrane module, thereby improving mass transfer efficiency. The rotating swing frame is suspended in the membrane tank and reciprocates around the swing assembly, causing the angle of contact between the MABR membrane module and the water flow to continuously change, significantly improving the mass transfer effect of the biofilm.

[0018] 4) When this utility model is running, the movement of the membrane stack is relatively flexible. The running trajectories of the two membrane stacks can be the same or relative. This utility model has less requirement for the tank structure and less requirement for the fixed beam, making it easy to implement and promote. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the present invention.

[0021] In the diagram, 1. Fixed beam; 1-1. Support rod; 1-2. Connecting rod; 1-3. Rotating shaft; 2. Rotating swing frame; 3. Aeration and flushing blower; 4. Pulse exhaust chamber; 5. Pulse aeration box; 6. Membrane blower. Detailed Implementation

[0022] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0023] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the utility model. Furthermore, it should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. The terms "first," "second," etc., used in this utility model are provided for the convenience of describing the technical solution of this utility model and have no specific limiting effect; they are all general terms and do not constitute a limitation on the technical solution of this utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict, all of which are within the scope of protection claimed by this utility model.

[0024] Example 1 See Figure 1 This embodiment provides a swing-type membrane bioreactor, including four swing components, two rotating swing frames 2, two MABR membrane modules submerged in wastewater, the MABR membrane modules being installed inside the rotating swing frames 2, a drive device and a membrane blower 6, the drive device being a pulse exhaust chamber 4 located on the left and right sides of the rotating swing frames 2.

[0025] Each swing assembly includes a fixed beam 1, a support rod 1-1, a connecting rod 1-2, and a rotating shaft 1-3 arranged parallel to the membrane tank. One end of the fixed beam 1 and the support rod 1-1 are connected through the rotating shaft 1-3. The other end of the support rod 1-1 is connected to one end of the connecting rod 1-2 through another rotating shaft 1-3. The other end of the connecting rod 1-2 is fixedly connected to one side of the upper part of the rotating swing frame 2. Every two swing assemblies are connected to one rotating swing frame 2. The swing assemblies are above the sewage liquid surface.

[0026] When the MABR membrane equipment is running, the membrane blower 6 is turned on, and the exhaust gas from the MABR membrane enters the pulse exhaust chamber 4. When the gas storage capacity of the pulse exhaust chamber 4 gradually increases but does not reach the exhaust capacity, the buoyancy component of the MABR membrane module 5 is greater than the gravity, causing the rotating swing frame 2 to swing eccentrically upwards and the other side to swing eccentrically downwards. When the gas storage capacity of the pulse exhaust chamber 4 reaches the exhaust capacity, the gas is released, and the buoyancy of the MABR membrane module 5 is less than the gravity. A pulse aeration box 5 is provided below the rotating swing frame 2. The pulse aeration box 5 is connected to the aeration and flushing blower 3. The number of pulse aeration boxes 5 under each rotating swing frame 2 is the same, with 6 on each side (this utility model does not limit the number of aeration boxes, as long as the number of pulse aeration boxes under each rotating swing frame is the same, the 6 here is just an example). When the pulse aeration box 5 on one side starts aeration, the MABR membrane module above the pulse aeration box 5 is driven to float on one side by the gas flushing, and sinks on the other side by gravity. Together with the pulse exhaust chamber 4, it drives the two rotating swing frames 2 to swing back and forth around the central rotating connecting shaft 3, so as to fully contact the water.

[0027] The structure of this utility model is more stable and the running trajectory is controllable (the rotating swing frame has 2 connection points for control, and the movement is a parallelogram trajectory). The running trajectories of the two rotating swing frames can be the same or opposite.

[0028] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A swing-type membrane bioreactor, characterized in that, The device includes a membrane blower, several rotating swing frames disposed in a membrane tank, several MABR membrane modules, several swing components, and a drive device. The MABR membrane modules are mounted on the rotating swing frames, and the swing components are movably connected to the rotating swing frames. The drive device enables the rotating swing frames to reciprocate through the swing components. The drive device is a pulse exhaust chamber disposed on the rotating swing frames.

2. The swing-type membrane bioreactor according to claim 1, characterized in that, The swing assembly includes a fixed beam, a support rod, and a connecting rod. Each end of the support rod is provided with a rotating shaft. The fixed beam and the connecting rod are movably connected through the rotating shafts on the support rods. The upper part of the rotating swing frame is connected to the support rods through the connecting rods.

3. The swing-type membrane bioreactor according to claim 2, characterized in that, The number of support rods is ≥2.

4. A swing-type membrane bioreactor according to claim 2, characterized in that, The support rods are of the same length and are arranged in parallel.

5. A swing-type membrane bioreactor according to claim 1, characterized in that, The MABR membrane module is a non-porous, oxygen-permeable hollow fiber membrane with a biofilm attached to the outside of the membrane.

6. A swing-type membrane bioreactor according to claim 2, characterized in that, The fixed beam and support rod are located above the water surface.

7. A swing-type membrane bioreactor according to any one of claims 1-6, characterized in that, The exhaust outlet of the MABR membrane module is connected to the pulse exhaust chamber.

8. A swing-type membrane bioreactor according to any one of claims 1-6, characterized in that, It also includes pulse aeration boxes located below the rotating swing frame, with the same number of pulse aeration boxes under each rotating swing frame.

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