Multi-angle enhanced contact membrane bioreactor

Abstract

The invention provides a multi-angle enhanced contact membrane bioreactor which comprises a rotary swing frame, a membrane fan, an MABR membrane assembly, a rotary connecting shaft, an aeration assembly, a driving device and a suspension fixing beam arranged on a membrane pool, the rotary swing frame is movably connected with the suspension fixing beam through the rotary connecting shaft, the MABR membrane assembly is installed on the rotary swing frame, and the aeration assembly is installed on the rotary swing frame. The driving device drives the MABR membrane component and the rotary swinging frame to rotate and swing in a reciprocating manner around the axis of the rotary connecting shaft; the angles of the MABR membrane assembly, the sewage flowing direction, the sludge flowing direction and the aeration flow direction are circularly changed in the swinging process. The device is simple in structural design and convenient and fast to disassemble and maintain; the adjustment flexibility of the motion structure is high, corollary equipment is few, corollary equipment such as folded plates or partition plates for ensuring full contact between the membrane and water flow does not need to be added, dead zones are reduced, and the manufacturing cost is low; and the main swing connecting structure is above the water surface, so that the service life is long.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and relates to bioreactors, and more particularly to a multi-angle enhanced 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. Summary of the Invention

[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 multi-angle enhanced contact membrane bioreactor. The motion structure design of this invention 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 oscillating membrane frame, thus reducing manufacturing costs. The main oscillating connection structures are all above the water surface, resulting in a long service life. Compared with other reciprocating structures, the oscillating structure has less wear and tear on connecting parts, while avoiding jamming. Start-up and shutdown control is simple; only the amount of gas in the exhaust gas inlet drive device needs to be changed 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 multi-angle enhanced contact membrane bioreactor, comprising a rotating swing frame, a membrane blower, a MABR membrane module, a rotating connecting shaft, an aeration assembly, a drive device, and a suspension beam mounted on the membrane tank. The rotating swing frame is movably connected to the suspension beam via the rotating connecting shaft. The MABR membrane module is mounted on the rotating swing frame. The drive device drives the MABR membrane module and the rotating swing frame to reciprocate around the axis of the rotating connecting shaft. During the swinging process, the angle between the MABR membrane module and the wastewater flow direction, the sludge flow direction, and the aeration flow direction changes cyclically.

[0008] As a preferred embodiment of the present invention, the rotation and swing direction of the rotating swing frame alternates between the flow of water and the flow of water.

[0009] As a preferred embodiment of the present invention, the driving device includes a two-position solenoid valve, a flushing fan and a telescopic cylinder, the telescopic cylinder being connected to the rotating swing frame, and the flushing fan being connected to the aeration assembly; or the driving device is a combination of a pulse aeration box and a two-position solenoid valve, or a pulse exhaust chamber or a motor or a combination of a flushing fan and a pulse exhaust chamber disposed on the rotating swing frame.

[0010] As a preferred embodiment of the present invention, the rotating swing frame is provided with a sludge lifting pipe, which is arranged on one or both sides of the MABR membrane module.

[0011] In a preferred embodiment of the present invention, the exhaust gas of the MABR membrane module is connected to the sludge lifting pipe.

[0012] In a preferred embodiment of the present invention, the suspension fixing beam and the rotating connecting shaft are located above the water surface.

[0013] In a preferred embodiment of the present invention, the number of aeration components is ≥2, and the aeration components are evenly distributed below the rotating swing frame. The aeration components and the rotating swing frame do not contact each other, and there is a certain gap, the specific gap of which is determined by the height of the rotating swing frame and the depth of the membrane tank, and is not limited here.

[0014] As a preferred embodiment of the present invention, the MABR membrane module includes non-porous oxygen-permeable hollow fiber membrane filaments, with a biofilm attached to the outside of the membrane filaments.

[0015] As a preferred embodiment of the present invention, there are two rotating swing frames, two MABR membrane modules, and three rotating connecting shafts. The two rotating swing frames are symmetrically arranged on both sides of the central rotating connecting shaft. The top of a single rotating swing frame is hinged to a connecting rod through another rotating connecting shaft, and the midpoint of the connecting rod is connected to the central rotating connecting shaft. Several aeration components are evenly arranged below each MABR membrane module. The exhaust gas from the MABR membrane enters the aeration components on the left and right sides of the bottom of the air inlet fixing frame in turn through two-position solenoid valves.

[0016] As a preferred embodiment of the present invention, it further includes a fixed frame, wherein the suspension fixed beam is disposed on the fixed frame, and the distance between the suspension fixed beam and one end of the fixed frame is 1 / 4-1 / 3. The connecting rod is hinged to the rotating swing frame through a rotating connecting shaft, so that the rotating swing frame is located at an eccentric position on the fixed frame. The fixed frame is also provided with a stop block fixing bracket, and the two ends of the stop block fixing bracket are connected to adjustable limit blocks through screws to limit the swing amplitude. The driving device is a pulse exhaust chamber, which is staggered with the rotating connecting shaft. The pulse exhaust chamber enables the rotating swing frame to swing back and forth around the rotating connecting shaft.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1) The motion structure design of this invention is simple, and disassembly and maintenance are convenient and quick; the motion structure has high adjustment flexibility and can realize the adjustment of motion amplitude; the MABR swing membrane frame has fewer 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, resulting in a long service life; compared with other reciprocating structures (externally driven structures), the wear and tear of the connecting parts of the swing structure is small, and the jamming phenomenon is avoided (externally driven structures often run continuously, and jamming will lead to motor overload, equipment shutdown, difficult and time-consuming maintenance).

[0018] 2) The start-stop control of the present invention is simple. It only requires changing the amount of gas 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.

[0019] 3) The aeration and flushing structure of this invention is independent of the main structure of the rotating swing. The rotating swing frame is driven by an external force to achieve reciprocating swing. The driving force can be a simple aeration and flushing, a gas lift pipe, a cylinder or a motor, etc.

[0020] 4) The present invention can adopt a single-axis rotational swing structure, which is simple, low in cost, convenient for construction and transportation, not prone to fatigue, long in life, convenient for maintenance and operation, and has a more flexible operating strategy.

[0021] 5) 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

[0022] 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.

[0023] Figure 1 This is a schematic diagram of Example 1.

[0024] Figure 2 This is a schematic diagram of the rotating and swinging motion against the direction of water flow in Example 1.

[0025] Figure 3 This is a schematic diagram of Example 1, showing the device rotating and swinging in the direction of the water flow.

[0026] Figure 4 This is a schematic diagram of Example 2.

[0027] Figure 5 This is a schematic diagram of Example 3.

[0028] Figure 6 This is a schematic diagram of Example 4.

[0029] Figure 7 This is a schematic diagram of Example 5.

[0030] Figure 8 This is a schematic diagram of Example 6.

[0031] Figure 9 This is a schematic diagram of Example 7.

[0032] In the diagram, 1. Fixed frame; 1-1. Suspension fixed beam; 1-2. Aeration component fixed bracket; 1-3. Connecting rod; 1-4. Stop block fixed bracket; 1-5. Adjustable limit stop block; 2. Rotary swing frame; 3. Rotary connecting shaft; 4. Drive device; 4-1. Two-position solenoid valve; 4-2. Telescopic cylinder; 4-3. Flushing blower; 4-4. Motor; 5. MABR membrane module; 5-1. MABR membrane module exhaust pipe; 6. Sludge lifting pipe; 7. Hydraulic circulation thruster; 8. Pulse aeration box; 9. Membrane blower; 10. Pulse exhaust chamber; 11. Exhaust gas emission regulating valve; 12. Exhaust gas outlet; 13. Hydraulic baffle. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] This invention provides a multi-angle enhanced contact membrane bioreactor. The motion structure design of this invention is simple, and disassembly and maintenance are convenient and quick. The motion structure has high adjustment flexibility, and the motion amplitude can be adjusted. The MABR swing membrane frame requires fewer supporting equipment, eliminating the need for additional baffles or partitions to ensure full contact between the membrane and the water flow, reducing dead zones and lowering manufacturing costs. The main swing connection structures are all above the water surface, resulting in a long service life. Compared with other reciprocating structures (externally driven structures), the swing structure has less wear and tear on the connecting parts, while avoiding jamming (externally driven structures often operate continuously, and jamming can lead to motor overload, equipment shutdown, and difficult and time-consuming maintenance).

[0035] The start-stop control is simple; it only requires changing the amount of gas in the exhaust gas intake drive device to achieve vibration, static, and high-frequency / low-frequency vibration of the MABR membrane module. The process is simple and has low requirements for operation and maintenance.

[0036] The aeration and flushing structure is independent of the main rotating and swinging structure. The rotating and swinging frame is driven by an external force to achieve reciprocating swinging. The driving force can be a simple aeration and flushing structure, a gas lift pipe, a cylinder, or a motor.

[0037] The present invention can also adopt a single-axis rotational swing structure, which is simple, low-cost, easy to construct and transport, not prone to fatigue, long-lasting, easy to maintain and operate, and has a more flexible operating strategy.

[0038] The membrane of the MABR membrane module of the present invention is a non-porous, oxygen-permeable hollow fiber membrane filament, with a biofilm attached to the outside of the membrane filament, and water flow and sludge passing through the membrane filament from different angles.

[0039] When the multi-angle enhanced contact membrane bioreactor of the present invention is running, the rotating swing frame, under the action of the driving device, drives the MABR membrane module to swing left and right sequentially in the wastewater.

[0040] Example 1 See Figure 1 , Figure 2 and Figure 3 This embodiment provides a multi-angle enhanced contact membrane bioreactor, including a fixed frame 1 and a suspended fixed beam 1-1, a rotating swing frame 2, a MABR membrane module 5 immersed in sewage and a drive device 4. The drive device consists of a two-position control valve 4-1, a telescopic cylinder 4-2 and a flushing blower 4-3.

[0041] The rotating connecting shaft 3 is connected to the suspension fixed beam 1-1, and the top of the rotating swing frame 2 is connected to the rotating connecting shaft 3 and fixed to the fixed frame 1.

[0042] The drive unit 4 provides driving force to drive the MABR membrane module 5 and the rotating swing frame 2 to reciprocate around the axis of the rotating connecting shaft 3. During the swinging process, the angle between the MABR membrane module 5 and the direction of sewage flow, sludge flow, and aeration flow changes cyclically.

[0043] The suspended fixed beam 1-1 and the rotating connecting shaft 3 are above the water surface, and the membrane fan 9 is connected to the air inlet of the MABR membrane module 5.

[0044] The rotating swing frame 2 includes sludge lifting pipes 6, which are located on both sides of the MABR membrane module 5, one on each side. The exhaust pipe 5-1 of the MABR membrane module is connected to the sludge lifting pipe 6. The exhaust gas rises and is sucked into the sludge on the lower side of the tank. The two exhaust gas inlet points change height as the membrane frame swings, alternating to become higher air inlet points, and taking turns sucking in sludge from both sides. The positions of the sludge inlet and outlet of the circulating lifting pipe change continuously as the rotating swing frame 2 swings.

[0045] During operation, part of the exhaust gas from the telescopic cylinder merges with the intake gas of the MABR membrane module and enters the MABR membrane fibers. Since the cylinder exhaust gas is discharged intermittently, it can instantly increase the gas flow rate inside the MABR membrane, discharge the condensate inside the membrane, and ensure the oxygen transfer efficiency of the MABR membrane.

[0046] A pulse aeration box 8 is horizontally mounted on the aeration component fixing bracket 1-2 at the bottom of the fixed frame 1. Part of the cylinder exhaust gas enters the pulse aeration box 8, which pulses and releases large bubbles to wash over the MABR membrane module 5, causing the rotating swing frame 2 to rotate alternately with and against the water flow. A valve (not shown in the figure) is installed on the MABR membrane module exhaust pipe 5-1 to regulate the gas flow rate and control the swing speed. The reciprocating frequency of the device is controlled by a two-position solenoid valve 4-1. The membrane is a non-porous, oxygen-permeable hollow fiber membrane filament with a biofilm attached to its outer surface. Water and sludge pass through the membrane filament from different angles.

[0047] Example 2 See Figure 4 This embodiment provides a multi-angle enhanced contact membrane bioreactor, which consists of a fixed frame 1, a suspended fixed beam 1-1, a rotating swing frame 2, a rotating connecting shaft 3, and a drive device 4. The drive device 4 is a pulse aeration box 8 at the bottom. The top of the rotating swing frame 2 is connected to the axis of the rotating connecting shaft 3. When the MABR membrane equipment is running, the exhaust gas of the MABR membrane module enters the pulse aeration box 8 at the bottom of the fixed frame 1. There are two pulse aeration boxes. When one side of the pulse aeration box 8 starts aeration, the MABR membrane module 5 above the pulse aeration box 8 is driven to float on one side by the gas scouring and sinks on the other side. The rotating swing membrane frame 2 swings back and forth around the rotating connecting shaft 3 to fully contact the water.

[0048] In this embodiment, no additional power drive is required; the buoyancy generated by the gas scouring during aeration is sufficient to drive the reciprocating swing of the rotating swing frame.

[0049] Example 3 See Figure 5 This embodiment provides a multi-angle enhanced contact membrane bioreactor, which consists of a fixed frame 1, a suspended fixed beam 1-1, a rotating swing frame 2, a rotating connecting shaft 3, and a driving device 4. The driving device 4 is a pulse exhaust chamber 10 fixed on the rotating swing frame 2. The pulse exhaust chambers 10 are respectively arranged on the left and right sides of the rotating swing frame 2. The top of the rotating swing frame 2 is connected to the axis of the rotating connecting shaft 3. When the MABR membrane equipment is running, the driving gas alternately enters the pulse exhaust chambers 10 on the left and right sides under the action of the two-position solenoid valve 4-1. When the gas enters the pulse exhaust chamber 10 on one side, the rotating swing frame 2 floats up under the action of buoyancy. The rotating swing frame 2 swings back and forth around the rotating connecting shaft 3.

[0050] In this embodiment, no additional power drive is required; the reciprocating swing of the rotating swing frame can be driven solely by the buoyancy generated by the gas in the exhaust chamber.

[0051] Example 4 See Figure 6This embodiment provides a multi-angle enhanced contact membrane bioreactor, which consists of a fixed frame 1, a suspended fixed beam 1-1, a rotating swing frame 2, a rotating connecting shaft 3 and a drive device 4. The pulse aeration box 8 is connected to the exhaust gas of the MABR membrane module 5. The drive device 4 is a motor 4-4, which drives the rotating swing frame 2 to realize the reciprocating motion of the MABR membrane frame.

[0052] Example 5 See Figure 7 This embodiment provides a multi-angle enhanced contact membrane bioreactor, consisting of a suspended fixed beam 1-1, two rotating swing frames 2, three rotating connecting shafts 3, and a drive device 4. The drive device 4 consists of pulse aeration boxes 8 on the left and right sides of the bottom. The 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 a middle connecting rod 1-3. When the MABR membrane equipment is running, the exhaust gas from the MABR membrane enters the pulse aeration boxes 8 on the left and right sides of the bottom of the air intake fixed frame 1 through two-position solenoid valves 4-1 in turn. There are 6 pulse aeration boxes 8 on each side (in this embodiment, the number of pulse aeration boxes is only an example, and it is only necessary to ensure that the number of pulse aeration boxes under each rotating swing frame is the same). When one side of the pulse aeration box 8 starts aeration, the MABR membrane module above the pulse aeration box 8 is driven to float on one side by the gas scouring, and sinks on the other side by gravity. The two rotating swing frames 2 swing back and forth around the central rotating connecting shaft 3, making full contact with the water. (It can also have a buoyancy cavity fixed on the rotating frame).

[0053] Compared to Example 2, the structure of this example can be used in large-scale sewage treatment plants.

[0054] Example 6 See Figure 8 This embodiment provides a multi-angle enhanced contact membrane bioreactor, which consists of a fixed frame 1, a suspended fixed beam 1-1, a rotating swing frame 2, a rotating connecting shaft 3, and a driving device 4. The rotating swing frame 2 is connected to the fixed frame 1 through the suspended fixed beam 1-1. The suspended fixed beam 1-1 is located at an eccentric position of the fixed frame 1, at a distance of 1 / 4 to 1 / 3 from one end of the fixed frame 1. The rotating connecting shaft 3 is hinged to the suspended fixed beam 1-1, so that the rotating connecting shaft 3 is fixed on the fixed frame 1.

[0055] The fixed frame 1 is also equipped with a stop block fixing bracket 1-4. The two ends of the stop block fixing bracket 1-4 are connected by screws to two adjustable limit blocks 1-5 on the left and right sides, which are used to limit the swing amplitude. The screws are used to change the relative position of the adjustable limit blocks 1-5 (change the swing amplitude).

[0056] The drive device 4 is a pulse exhaust chamber 10, which is offset from the rotary connecting shaft 3.

[0057] When the MABR membrane equipment is running, the exhaust gas of the MABR membrane module 5 enters the pulse exhaust chamber 10. When the gas storage capacity of the pulse exhaust chamber 10 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 upward and the other side to swing eccentrically downward. When the gas storage capacity of the pulse exhaust chamber 10 reaches the exhaust capacity, the gas is released, and the buoyancy of the MABR membrane module 5 is less than the gravity, causing the rotating swing frame 2 to swing eccentrically downward and the other side to swing eccentrically upward.

[0058] During operation, the rotating swing frame 2 reciprocates around the rotating connecting shaft 3, making full contact with the water. The pulse aeration box 8 on the fixed frame 1 periodically flushes the biofilm, and some gas enters the pulse exhaust chamber 10, which accelerates the pulse frequency of the exhaust chamber, enhances the swing intensity of the rotating swing frame 2, and also enhances the hydraulic exchange between the MABR membrane module 5 and the outside world, ensuring full contact between pollutants and the biofilm.

[0059] The pulse exhaust chamber 10 can be located at the top of the rotating swing frame 2, at the bottom of the rotating swing frame 2, or in the middle of the rotating swing frame 2.

[0060] The air source for the pulse aeration box 8 can be a blower or the exhaust gas from the MABR membrane module.

[0061] Example 7 See Figure 9 This embodiment provides a multi-angle enhanced contact membrane bioreactor, which consists of a fixed frame 1, a suspended fixed beam 1-1, a rotating swing frame 2, a rotating connecting shaft 3 and a driving device 4. The rotating swing frame 2 and the fixed frame 1 are connected by the suspended fixed beam 1-1, and the position of the suspended fixed beam 1-1 is located at the center of the fixed frame 1. The rotating connecting shaft 3 is hinged to the suspended fixed beam 1-1, so that the rotating connecting shaft 3 is fixed on the fixed frame 1.

[0062] The fixed frame 1 is also equipped with a stop block fixing bracket 1-4. The two ends of the stop block fixing bracket 1-4 are connected by screws to two adjustable limit blocks 1-5 on the left and right sides, which are used to limit the swing amplitude. The screws are used to change the relative position of the adjustable limit blocks 1-5 (change the swing amplitude).

[0063] A hydraulic circulation thruster 7 is also installed at the end of the sewage flow direction, which can increase the flushing force of the sewage flow direction.

[0064] The drive device 4 is a pulse exhaust chamber 10, which is located on the upper part of the rotating swing frame 2 near the water inlet side. A hydraulic baffle 13 is provided on the lower part of the same side, which increases the reverse thrust.

[0065] A fixed-height exhaust gas outlet 12 is provided in the middle of the side of the fixed frame near the water inlet. It is connected to the exhaust gas pipe 5-1 of the MABR membrane module through the exhaust gas emission regulating valve 11. This helps to prevent pressure changes in the membrane due to swaying when different membrane stacks are working at the same time, so as to ensure uniform gas output.

[0066] When the MABR membrane equipment is running, the exhaust gas from the MABR membrane module 5 enters the pulse exhaust chamber 10. When the gas storage capacity of the pulse exhaust chamber 10 gradually increases but does not reach the exhaust volume, the buoyancy of the MABR membrane module 5 gradually exceeds the gravity, causing the rotating swing frame 2 to swing upward and the other side to swing downward. When the gas storage capacity of the pulse exhaust chamber 10 reaches the exhaust volume, the gas is released, and the buoyancy of the MABR membrane module 5 becomes less than the gravity, causing the rotating swing frame 2 to swing downward and the other side to swing upward.

[0067] During operation, the rotating swing frame 2 reciprocates around the rotating connecting shaft 3, making full contact with the water. The pulse aeration box 8 on the fixed frame 1 periodically flushes the biofilm, and some gas enters the pulse exhaust chamber 10, which accelerates the pulse frequency of the exhaust chamber, enhances the swing intensity of the rotating swing frame 2, and also enhances the hydraulic exchange between the MABR membrane module 5 and the outside world, ensuring full contact between pollutants and the biofilm.

[0068] The air source for the pulse aeration box 8 can be a blower or the exhaust gas from the MABR membrane module.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the method of the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of the present invention are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A multi-angle enhanced contact membrane bioreactor, characterized in that, The system includes a rotating swing frame, a membrane blower, a MABR membrane module, a rotating connecting shaft, an aeration assembly, a drive unit, and a suspension beam mounted on the membrane tank. The rotating swing frame is movably connected to the suspension beam via the rotating connecting shaft. The MABR membrane module is mounted on the rotating swing frame. The drive unit drives the MABR membrane module and the rotating swing frame to reciprocate around the axis of the rotating connecting shaft. During the swinging process, the angle between the MABR membrane module and the wastewater flow direction, the sludge flow direction, and the aeration flow direction changes cyclically.

2. The multi-angle enhanced contact membrane bioreactor according to claim 1, characterized in that, The rotating swing frame rotates alternately with and against the water flow.

3. The multi-angle enhanced contact membrane bioreactor according to claim 1, characterized in that, The driving device includes a two-position solenoid valve, a flushing fan, and a telescopic cylinder. The telescopic cylinder is connected to the rotating swing frame, and the flushing fan is connected to the aeration assembly. Alternatively, the driving device may be a combination of a pulse aeration box and a two-position solenoid valve, or a pulse exhaust chamber or a motor or a combination of a flushing fan and a pulse exhaust chamber mounted on the rotating swing frame.

4. A multi-angle enhanced contact membrane bioreactor according to any one of claims 1-3, characterized in that, The rotating swing frame is equipped with a sludge lifting pipe, which is located on one or both sides of the MABR membrane module.

5. A multi-angle enhanced contact membrane bioreactor according to claim 4, characterized in that, The exhaust gas from the MABR membrane module is fed into the sludge lifting pipe.

6. A multi-angle enhanced contact membrane bioreactor according to any one of claims 1-3, characterized in that, The suspended fixed beam and the rotating connecting shaft are located above the water surface.

7. A multi-angle enhanced contact membrane bioreactor according to any one of claims 1-3, characterized in that, The number of aeration components is ≥2, and the aeration components are evenly distributed below the rotating swing frame.

8. A multi-angle enhanced contact membrane bioreactor according to any one of claims 1-3, characterized in that, The MABR membrane module includes non-porous, oxygen-permeable hollow fiber membrane filaments with a biofilm attached to the outside of the filaments.

9. A multi-angle enhanced contact membrane bioreactor according to claim 1, characterized in that, There are two rotating swing frames, two MABR membrane modules, and three rotating connecting shafts. The two 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 through another rotating connecting shaft, and the midpoint of the connecting rod is connected to the central rotating connecting shaft. Several aeration components are evenly arranged below each MABR membrane module. The exhaust gas from the MABR membrane enters the aeration components on the left and right sides of the bottom of the air inlet fixing frame in turn through two-position solenoid valves.

10. A multi-angle enhanced contact membrane bioreactor according to claim 1, characterized in that, It also includes a fixed frame, on which the suspension fixed beam is mounted. The suspension fixed beam is 1 / 4 to 1 / 3 of the distance from one end of the fixed frame. The suspension fixed beam is connected to the rotating swing frame through a rotating connecting shaft, so that the rotating swing frame is located at an eccentric position on the fixed frame. The fixed frame is also provided with a stop block fixing bracket. The two ends of the stop block fixing bracket are connected to adjustable limit blocks through screws to limit the swing amplitude of the connecting rod. The driving device is a pulse exhaust chamber. The pulse exhaust chamber is staggered with the rotating connecting shaft, and the rotating swing frame reciprocates around the rotating connecting shaft through the pulse exhaust chamber.

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