Linked contact membrane bioreactor

Abstract

The utility model discloses a kind of linkage contact membrane bioreactor, including the suspension fixed beam being arranged in membrane pool, several rotating swing frames, membrane fan, aeration assembly, MABR membrane assembly, rotating connection shaft and driving device, rotating swing frame is connected with suspension fixed beam by rotating connection shaft, MABR membrane assembly is installed on rotating swing frame, driving device drives MABR membrane assembly and rotating swing frame around rotating connection shaft's axle to carry out reciprocating rotary swing;MABR membrane assembly is cyclically changed with the angle of sewage flow direction, sludge flow direction, aeration flow direction in swing process.This utility model structure design is simple, dismounts maintenance is convenient, fast;The adjustment flexibility of motion structure is high, and supporting equipment is less, without increasing the supporting equipment such as gusset or baffle to ensure that membrane and water flow are fully contacted, reduce dead zone, and manufacturing cost is low;Main swing connection structure is above water surface, and service life is long.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and relates to bioreactors, especially to a linkage contact 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 utility model first provides a linkage-type contact membrane bioreactor. The motion structure design of this utility model is simple, and installation, disassembly, and maintenance are convenient and quick; the motion structure adjustment is highly flexible, requiring fewer supporting equipment for the MABR swing membrane frame, thus 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 also 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.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a linkage-type contact membrane bioreactor, comprising a suspended fixed beam disposed in a membrane tank, several rotating swing frames, a membrane blower, an aeration component, several MABR membrane modules, several rotating connecting shafts, and a drive device. The rotating swing frames are connected to the suspended fixed beam via rotating connecting shafts. The MABR membrane modules are mounted on the rotating swing frames. The drive device drives the MABR membrane modules and the rotating swing frames to reciprocate around the axis of the rotating connecting shafts. During the swinging process, the angles of the MABR membrane modules with the wastewater flow direction, sludge flow direction, and aeration flow direction change cyclically. The drive device is a pulse exhaust chamber disposed on the rotating swing frames. The rotating swing frames are symmetrically arranged on both sides of the central rotating connecting shaft. The top of each rotating swing frame is hinged to a connecting rod via another rotating connecting shaft, and the midpoint of the connecting rod is connected to the central rotating connecting shaft.

[0008] 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.

[0009] In a preferred embodiment of this utility model, the rotating connecting shaft and the suspension fixing beam are located above the water surface.

[0010] In a preferred embodiment of this invention, the exhaust gas outlet of the MABR membrane module is connected to the pulse exhaust chamber.

[0011] In a preferred embodiment of this utility model, the aeration component is a pulse aeration box disposed below the rotating swing frame.

[0012] In a preferred embodiment of this utility model, the number of rotating swing frames is 2, and the number of rotating connecting shafts is 3.

[0013] In a preferred embodiment of this utility model, the pulse aeration box is disposed below two rotating swing frames, and the number of pulse aeration boxes under each rotating swing frame is the same.

[0014] As a preferred embodiment of this utility model, it also includes an aeration and flushing blower, which is connected to the aeration component.

[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 connection structure is above the water surface, and has a long service life; compared with other reciprocating structures (external power drive structure), the wear and tear of the connecting parts of the swing structure is small, and the jamming phenomenon is avoided (external power drive structure often runs continuously, and jamming will lead to motor overload, equipment shutdown, difficult maintenance and long maintenance time).

[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 rotating connecting shaft, 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. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the present invention.

[0020] In the diagram, 1. Support frame; 1-1. Connecting rod; 1-2. Suspension fixing beam; 2. Rotating swing frame; 3. Rotating connecting shaft; 4. Pulse aeration box; 5. MABR membrane module; 6. Membrane blower. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] Example 1 See Figure 1 This embodiment provides a linkage contact membrane bioreactor, including a suspended fixed beam 1-2 and a connecting rod 1-1, two rotating swing frames 2, two MABR membrane modules 5 submerged in sewage, a membrane blower 6, a drive device and an aeration and flushing blower 7. The drive device is a pulse exhaust chamber 4 set on the left and right sides of a single rotating swing frame 2.

[0024] A rotating connecting shaft 3 is fixed at the center of the connecting rod 1-1, and a rotating connecting shaft 3 is fixed at each of the left and right ends. A vertically mounted bracket 1 is fixed on the suspension fixed beam 1-2. The rotating connecting shaft 3 at the center is fixed at the connection between the bracket 1 and the suspension fixed beam 1-2, which is used to realize the rotation of the connecting rod 1-1 around the rotating connecting shaft 3 at the center. The rotating swing frame 2 is hinged to the rotating connecting shaft 3 at the end of the connecting rod 1-2 to realize the swing.

[0025] Two rotating swing frames 2 are symmetrically arranged on both sides of the central rotating connecting shaft 3, and their tops are hinged to the axis of the central rotating connecting shaft 3 via the intermediate connecting rod 1-1.

[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 tray is horizontally installed at the bottom of the bracket 1 for mounting pulse aeration boxes 8. The pulse aeration boxes 8 are located below the rotating swing frame 2. The number of pulse aeration boxes 8 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 one side of the pulse aeration box 8 starts aeration (the air source is provided by the aeration flushing blower 7), the MABR membrane module above the pulse aeration box 8 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 reciprocate around the central rotating connecting shaft 3 to achieve full contact with the water.

[0027] As a variant of this utility model, the pulse exhaust chamber 4 can also be removed, and the reciprocating swing can be achieved by driving the rotating swing frame solely through the pulse aeration box 8.

[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 linked contact membrane bioreactor, characterized in that, The system includes a suspended fixed beam installed in a membrane tank, several rotating swing frames, a membrane blower, an aeration component, several MABR membrane modules, several rotating connecting shafts, and a drive device. The rotating swing frames are connected to the suspended fixed beams via rotating connecting shafts. The MABR membrane modules are mounted on the rotating swing frames. The drive device drives the MABR membrane modules and the rotating swing frames to reciprocate around the axis of the rotating connecting shafts. During the swinging process, the angles between the MABR membrane modules and the wastewater flow direction, sludge flow direction, and aeration flow direction change cyclically. The drive device is a pulse exhaust chamber installed on the rotating swing frames. The rotating swing frames are symmetrically arranged on both sides of the central rotating connecting shaft. The top of each rotating swing frame is connected to another rotating connecting shaft via a connecting rod, and the midpoint of the connecting rod is connected to the central rotating connecting shaft.

2. The linked contact 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.

3. The linked contact membrane bioreactor according to claim 1, characterized in that, The suspended fixed beam and the rotating connecting shaft are located above the water surface.

4. The linked contact membrane bioreactor according to claim 1, characterized in that, The exhaust outlet of the MABR membrane module is connected to the pulse exhaust chamber.

5. A linked contact membrane bioreactor according to claim 1, characterized in that, The aeration component is a pulse aeration box located below the rotating swing frame.

6. A linked contact membrane bioreactor according to claim 5, characterized in that, The number of rotating swing frames is 2, and the number of rotating connecting shafts is 3.

7. A linked contact membrane bioreactor according to claim 6, characterized in that, The pulse aeration box is located below the two rotating swing frames.

8. A linked contact membrane bioreactor according to claim 1, characterized in that, It also includes an aeration and flushing blower, which is connected to the aeration assembly.

Images