Reciprocating type membrane aeration bio-membrane reactor

Abstract

The invention provides a reciprocating type membrane aeration bio-membrane reactor, which comprises a membrane box, the top of which is provided with an action wheel; the membrane assembly is arranged in the membrane box; the guide rail plate is used for being arranged on a membrane pool, an arc-shaped guide rail groove matched with the action wheel is formed in the guide rail plate in the length direction of the guide rail plate, and the arc-shaped guide rail groove is bent downwards; the buoyancy assembly is arranged at the bottom of the membrane box; the power assembly is used for being arranged on the membrane pool and connected with the membrane box, and the power assembly is used for driving the membrane box to reciprocate in the length direction of the arc-shaped guide rail groove. According to the reciprocating type membrane aeration bio-membrane reactor, the energy consumption can be reduced, and the mass transfer effect and the membrane area utilization rate can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to a reciprocating membrane aerated biofilm reactor. Background Art

[0002] Currently, the commonly used activated sludge processes mainly include Sequencing Batch Reactor (SBR), Anoxic-Oxic (AO), Anaerobic-Anoxic-Oxic (AAO), Cyclic Activated Sludge System (CASS), oxidation ditch and other process forms. All of these processes require aeration for oxygen supply, and the existing main aeration form is microporous aeration. Limited by the problems of gas-liquid interface kinetics, the oxygen utilization rate of microporous aeration is only 18-25% (corresponding to 1.8-2.2 kgO2 / kWh). In recent years, the emergence of Membrane Aerated Bioreactor (MABR) technology has fundamentally solved the problem of low oxygen utilization rate. A membrane aerated biofilm reactor is a low-energy-consuming membrane aerated bioreactor. It uses a gas-permeable membrane as the carrier for the growth of microorganisms, enabling microorganisms to grow on the outer surface of the membrane to form a stable biofilm. The inside of the membrane is air, and the oxygen in the air diffuses to the outer surface of the membrane to be utilized by microorganisms using the concentration gradient inside and outside the membrane as the driving force for transfer. This special oxygen supply method of the membrane aerated biofilm reactor enables it to have an oxygen utilization rate close to 100%, and the oxygen transfer rate can reach more than 6 kgO2 / Kwh. Currently, the operation modes of the membrane aerated biofilm reactor mainly have two forms: intermittent aeration and hydraulic circulation. Both of these forms drive the liquid-phase fluid for mixing and stirring, and a relatively high liquid-phase flow rate is required to achieve the purpose of controlling the thickness of the biofilm on the membrane filament surface. Therefore, it requires relatively high energy consumption, and there are problems of uneven mixing and low membrane area utilization rate during the operation of both forms. Summary of the Invention

[0003] In view of this, the present invention provides a reciprocating membrane aerated biofilm reactor, which can reduce energy consumption and improve the membrane area utilization rate.

[0004] To solve at least one of the above technical problems, the present invention adopts the following technical solutions:

[0005] A reciprocating membrane aerated biofilm reactor according to an embodiment of the present invention includes:

[0006] A membrane box, on the top of which traveling wheels are provided;

[0007] A membrane module, which is arranged in the membrane box;

[0008] The guide rail plate is used to be arranged on the membrane tank. An arc-shaped guide rail groove that cooperates with the moving wheels is arranged along the length direction of the guide rail plate, and the arc-shaped guide rail groove bends downward.

[0009] The buoyancy assembly is arranged at the bottom of the membrane box.

[0010] The power assembly is used to be arranged on the membrane tank and connected to the membrane box, and the power assembly is used to drive the membrane box to reciprocate along the length direction of the arc-shaped guide rail groove.

[0011] In an embodiment of the present invention, there are two groups of moving wheels oppositely arranged on both sides of the top of the membrane box, and there are two guide rail plates oppositely distributed on both sides of the membrane box. Each guide rail plate corresponds to one group of moving wheels. Each group of moving wheels includes a plurality of moving wheels arranged at intervals in sequence along the length direction of the guide rail plate. There are a plurality of arc-shaped guide rail grooves on each guide rail plate, and the moving wheels correspond to the arc-shaped guide rail grooves one by one.

[0012] In an embodiment of the present invention, the membrane box is formed into a frame structure, and the membrane box includes:

[0013] The membrane component bracket, the membrane component is arranged in the membrane component bracket and connected to the membrane component bracket;

[0014] The moving wheel bracket is located above the membrane component bracket and connected to the membrane component bracket, and the moving wheels are arranged on the moving wheel bracket;

[0015] The buoyancy bracket is located below the membrane component bracket and connected to the membrane component bracket, and the buoyancy assembly is connected to the buoyancy bracket.

[0016] In an embodiment of the present invention, the membrane component includes:

[0017] A plurality of membrane filament members, each membrane filament member is arranged vertically, and the plurality of membrane filament members are arranged at intervals in sequence in the membrane box and their arrangement direction is perpendicular to the length direction of the guide rail plate;

[0018] The main air distribution pipe is arranged above each membrane filament member and communicated with each membrane filament member respectively. A main air inlet pipe is arranged at the top of the main air distribution pipe;

[0019] The main gas collecting pipe is arranged below each membrane filament member and communicated with each membrane filament member, and a main gas outlet pipe is arranged at the bottom of the main gas collecting pipe.

[0020] In an embodiment of the present invention, each membrane filament member respectively includes:

[0021] The air distribution pipe is located at the top of the membrane filament member and its length direction is perpendicular to the main air distribution pipe. An air inlet pipe is arranged at the top of the air distribution pipe, and the air distribution pipe is connected to the air outlet of the main air distribution pipe through the air inlet pipe;

[0022] The collecting pipe is located at the bottom of the membrane filament component, and its length direction is perpendicular to the main collecting pipe. The collecting pipe is parallel and oppositely arranged to the air distribution pipe. An air outlet pipe is arranged at the bottom of the collecting pipe, and the collecting pipe is connected to the air inlet of the main collecting pipe through the air outlet pipe;

[0023] Multiple membrane filaments are located between the air distribution pipe and the collecting pipe and are arranged at intervals in sequence along the length direction of the air distribution pipe. Each membrane filament is arranged vertically. The upper end of each membrane filament is communicated with the air distribution pipe, and the lower end of each membrane filament is communicated with the collecting pipe.

[0024] In an embodiment of the present invention, the diameter of the driving wheel is smaller than the vertical distance from the upper surface to the lower surface of the arc-shaped guide rail groove.

[0025] In an embodiment of the present invention, the buoyancy component includes two floating cylinders, and the two floating cylinders are oppositely arranged on both sides of the bottom of the membrane box.

[0026] In an embodiment of the present invention, a buoyancy air inlet pipe and a buoyancy drain pipe are respectively arranged on each floating cylinder.

[0027] In an embodiment of the present invention, the power component includes:

[0028] A driving member;

[0029] A crank disk, the crank disk is connected to the output shaft of the driving member, the driving member is used to drive the crank disk to rotate, and a connecting rod is arranged at the edge of the crank disk;

[0030] An eccentric crank, one end of the eccentric crank is hinged to the connecting rod on the crank disk, and the other end of the eccentric crank is hinged to the membrane box through a spherical hinge connecting rod.

[0031] In an embodiment of the present invention, the driving member and the guide rail plate are used to be arranged on the top of the membrane tank, and the driving member is a reduction motor.

[0032] At least one of the above technical solutions of the present invention has the following beneficial effects:

[0033] In the reciprocating membrane aeration biofilm reactor of the present invention, by using the power component to drive the membrane box to reciprocate along the length direction of the arc-shaped guide rail groove, the membrane component reciprocates synchronously along the horizontal direction and the vertical direction together with the membrane box. During the movement process, the power directly acts on the membrane box body, and then drives the membrane component to swing, forming a micro-scale eddy current field, getting rid of the dependence on high liquid phase flow velocity, realizing the liquid phase mixing in the membrane tank and the control of the biofilm thickness, and can improve the mass transfer effect and the membrane area utilization rate. In addition, by setting the buoyancy component to provide buoyancy for the membrane box, and arranging a downwardly curved arc-shaped guide rail groove on the guide rail plate, the power component and the buoyancy component form a dual-mode drag reduction system, which can form an inertial force compensation mechanism, realize the mutual conversion of kinetic energy and potential energy, reduce the frictional resistance, reduce the power consumption, and thus reduce the energy consumption. Description of the Drawings

[0034] Figure 1 This is a schematic structural view of a reciprocating membrane aeration biofilm reactor in an embodiment of the present invention;

[0035] Figure 2 This is a schematic structural view of a membrane box of a reciprocating membrane aeration biofilm reactor in an embodiment of the present invention;

[0036] Figure 3 This is a schematic structural view of a membrane module of a reciprocating membrane aeration biofilm reactor in an embodiment of the present invention;

[0037] Figure 4 This is a side view of a membrane module of a reciprocating membrane aeration biofilm reactor in an embodiment of the present invention;

[0038] Figure 5 This is a schematic structural view of a membrane filament member of a reciprocating membrane aeration biofilm reactor in an embodiment of the present invention.

[0039] Reference Numerals:

[0040] 100, membrane box; 110, membrane module support; 120, moving wheel support; 121, moving wheel; 130, buoyancy support;

[0041] 200, membrane module; 210, membrane filament member; 211, air distribution pipe; 212, intake pipe; 213, gas collecting pipe; 214, outlet pipe; 215, membrane filament; 220, main air distribution pipe; 221, main intake pipe; 230, main gas collecting pipe; 231, main outlet pipe;

[0042] 300, guide rail plate; 310, arc-shaped guide rail groove; 400, floating drum; 410, buoyancy intake pipe; 420, buoyancy drain pipe;

[0043] 500, power assembly; 510, driving member; 520, crank disk; 530, eccentric crank; 540, spherical hinge connecting rod. Detailed Embodiments

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention fall within the scope of protection of the present invention.

[0045] Next, a reciprocating membrane aeration biofilm reactor according to an embodiment of the present invention will be specifically described with reference to the drawings.

[0046] AsFigure 1 As shown in the figure, the reciprocating membrane aeration biofilm reactor according to the embodiment of the present invention may include: a membrane box 100, a membrane module 200, a guide rail plate 300, a buoyancy assembly, and a power assembly 500. Among them, a moving wheel 121 is arranged at the top of the membrane box 100; the membrane module 200 is arranged in the membrane box 100; the guide rail plate 300 is used to be arranged on the membrane pool, and an arc-shaped guide rail groove 310 matching the moving wheel 121 is arranged along the length direction of the guide rail plate 300, and the arc-shaped guide rail groove 310 is bent downward; the buoyancy assembly is arranged at the bottom of the membrane box 100; the power assembly 500 is used to be arranged on the membrane pool and connected to the membrane box 100, and the power assembly 500 is used to drive the membrane box 100 to reciprocate along the length direction of the arc-shaped guide rail groove 310.

[0047] In this embodiment, the power assembly 500 can drive the membrane box 100 to reciprocate in the membrane pool along the length direction of the arc-shaped guide rail groove 310, and the membrane module 200 reciprocates synchronously with the membrane box 100 in the horizontal and vertical directions. For example, the stroke amplitude of the membrane box 100 can be 5-30 cm, and the reciprocating frequency can be 10-60 Hz. During the reciprocating movement, the water flow power directly acts on the membrane module 200, thereby forming a micro-scale eddy field, which can provide continuous mixing and stirring, improving the mass transfer effect compared with intermittent aeration. In addition, the reciprocating operation mode can also achieve the operation condition of full flow field coverage, effectively improving the effective utilization rate of the membrane area (close to 100%) compared with the hydraulic circulation operation mode. In addition, by setting the buoyancy assembly to provide buoyancy for the membrane box 100 and arranging the downward-bent arc-shaped guide rail groove 310 on the guide rail plate 300, the power assembly 500 and the buoyancy assembly form a dual-mode drag reduction system, which can, on the one hand, provide the membrane box 100 with reciprocating movements in two directions, the horizontal direction and the vertical direction, further improving the effective utilization rate of the membrane area. On the other hand, it can also form an inertial force compensation mechanism to realize the mutual conversion of kinetic energy and potential energy, reduce the frictional resistance, reduce the power consumption, and thus reduce the energy consumption.

[0048] As Figure 1 and Figure 2 shown, there are two groups of moving wheels 121 relatively arranged on both sides of the top of the membrane box 100, and there are two guide rail plates 300 relatively distributed on both sides of the membrane box 100. Each guide rail plate 300 corresponds to a group of moving wheels 121. Each group of moving wheels 121 includes a plurality of them arranged at intervals in sequence along the length direction of the guide rail plate 300. There are a plurality of arc-shaped guide rail grooves 310 on each guide rail plate 300, and the moving wheels 121 correspond to the arc-shaped guide rail grooves 310 one by one.

[0049] In this embodiment, by respectively arranging two sets of moving wheels 121 on both sides of the top of the bellows 100, arranging arc-shaped guide grooves 310 corresponding to the moving wheels 121 on the guide rail plate 300, and correspondingly connecting the moving wheels 121 with the respective arc-shaped guide grooves 310, the stability of the bellows 100 when reciprocating along the length direction of the arc-shaped guide grooves 310 can be improved.

[0050] As Figure 1 and Figure 2 shown, the bellows 100 is formed into a frame structure. The bellows 100 includes: a membrane module bracket 110, a moving wheel bracket 120, and a buoyancy bracket 130. Among them, the membrane module 200 is arranged in the membrane module bracket 110 and connected to the membrane module bracket 110; the moving wheel bracket 120 is located above the membrane module bracket 110 and connected to the membrane module bracket 110, and the moving wheels 121 are arranged on the moving wheel bracket 120; the buoyancy bracket 130 is located below the membrane module bracket 110 and connected to the membrane module bracket 110, and the buoyancy component is connected to the buoyancy bracket 130. In this embodiment, the frame-structured bellows 100 enables the water flow power to directly act on the membrane module 200, thereby forming a micro-scale eddy field, so as to provide continuous mixing and stirring, and improve the mass transfer effect and the effective utilization rate of the membrane area.

[0051] As Figure 3 and Figure 4 shown, the membrane module 200 includes: a plurality of membrane filament members 210, a main gas distribution pipe 220, and a main gas collection pipe 230. Among them, each membrane filament member 210 is arranged in the vertical direction, and the plurality of membrane filament members 210 are arranged at intervals in the bellows 100 in sequence and their arrangement direction is perpendicular to the length direction of the guide rail plate 300; the main gas distribution pipe 220 is arranged above each membrane filament member 210 and communicated with each membrane filament member 210 respectively, and a main air inlet pipe 221 is arranged at the top of the main gas distribution pipe 220; the main gas collection pipe 230 is arranged below each membrane filament member 210 and communicated with each membrane filament member 210, and a main outlet pipe 231 is arranged at the bottom of the main gas collection pipe 230.

[0052] In this embodiment, the plurality of membrane filament members 210 are arranged in the vertical direction, which can effectively increase the effective membrane area, so that oxygen can continuously diffuse to the outside of the membrane in a bubble-free form through the micropores of the membrane filaments 215, thereby providing sufficient oxygen source for the aerobic microorganisms attached to its surface. The main gas distribution pipe 220 serves as the primary gas distribution channel. By connecting with the tops of each membrane filament member 210, it ensures that the gas can be evenly transmitted into each membrane filament 215, effectively improving the uniformity of gas distribution. The main air inlet pipe 221 at the top of the main gas distribution pipe 220 is designed to facilitate docking with the external gas source system to achieve centralized control of the overall gas flow. The main gas collection pipe 230 collects the oxygen released from the bottoms of each membrane filament member 210 and exports it from the membrane pool through the main outlet pipe 231 arranged at the bottom for unified discharge or recovery.

[0053] As Figure 5 shown, each membrane filament member 210 respectively includes: a gas distribution pipe 211, a gas collecting pipe 213, and a gas collecting pipe 213. Among them, the gas distribution pipe 211 is located at the top of the membrane filament member 210 and its length direction is perpendicular to the main gas distribution pipe 220. An air inlet pipe 212 is provided at the top of the gas distribution pipe 211, and the gas distribution pipe 211 is connected to the air outlet of the main gas distribution pipe 220 through the air inlet pipe 212; the gas collecting pipe 213 is located at the bottom of the membrane filament member 210 and its length direction is perpendicular to the main gas collecting pipe 230. The gas collecting pipe 213 is parallel and oppositely arranged to the gas distribution pipe 211. An air outlet pipe 214 is provided at the bottom of the gas collecting pipe 213, and the gas collecting pipe 213 is connected to the air inlet of the main gas collecting pipe 230 through the air outlet pipe 214; a plurality of membrane filaments 215 are located between the gas distribution pipe 211 and the gas collecting pipe 213 and are arranged at intervals in sequence along the length direction of the gas distribution pipe 211. Each membrane filament 215 is arranged in the vertical direction. The upper end of each membrane filament 215 is communicated with the gas distribution pipe 211, and the lower end of each membrane filament 215 is communicated with the gas collecting pipe 213.

[0054] In this embodiment, the gas distribution pipe 211 serves as the gas distribution starting point of the membrane filament member 210, introduces the gas from the main gas distribution pipe 220 through the air inlet pipe 212, and evenly transports it to the upper ends of each membrane filament 215 along the length direction of the gas distribution pipe 211 to ensure that all membrane filaments 215 obtain a balanced gas source input. The membrane filament 215 serves as the core channel for gas mass transfer. Its hollow microporous structure allows oxygen to laterally diffuse to the outer surface of the membrane under the drive of a pressure difference, continuously providing a bubble-free oxygen environment for the external biofilm, thereby reducing oxygen loss, improving oxygen utilization rate, and inhibiting interference with the denitrification reaction during the nitrogen removal process. The lower end of each membrane filament 215 is connected to the gas collecting pipe 213. The tail gas that has not completed mass transfer enters the gas collecting pipe 213 through the bottom of the membrane filament 215 for collection, and then is transported to the main gas collecting pipe 230 through the air outlet pipe 214, and finally is centrally discharged or recycled, forming a closed and controllable oxygen supply path. In addition, the parallel arrangement of the gas distribution pipe 211 and the gas collecting pipe 213 at both ends of the membrane filament 215 not only realizes the stable support of the structure of the membrane filament 215, but also facilitates the modular installation and maintenance of the entire membrane filament 215 assembly. The membrane filaments 215 are arranged at intervals along the length direction of the gas distribution pipe 211, which not only helps the full contact of the biofilm and oxygen transmission, but also effectively prevents the mutual interference, entanglement or excessive accumulation of the membrane filaments 215, and prolongs the operation cycle of the system.

[0055] In an embodiment of the present invention, the moving wheel 121 can rotate freely, and the diameter of the moving wheel 121 is smaller than the vertical distance from the upper surface to the lower surface of the arc-shaped guide groove 310. The buoyancy assembly includes two floating cylinders 400, and the two floating cylinders 400 are oppositely arranged on both sides of the bottom of the bellows 100. Specifically, the vertical distance from the upper surface to the lower surface of the arc-shaped guide groove 310 is 2-4 mm higher than the diameter of the moving wheel 121. Thus, the overall buoyancy of the bellows 100 can be adjusted by injecting gas or draining water into the floating cylinders 400, so that the bellows 100 floats in water, and then the moving wheel 121 is separated from the lower surface of the arc-shaped guide groove 310 to form a controllable gap, and the height of the gap is 0.1-2 mm. Thus, the arc-shaped guide groove 310 and the moving wheel 121 roll and rub, which can effectively reduce the frictional resistance, reduce the power loss and the energy consumption of the power assembly 500.

[0056] As Figure 2 shown, a buoyancy air inlet pipe 410 and a buoyancy drain pipe 420 are respectively arranged on each floating cylinder 400. Specifically, the buoyancy air inlet pipe is arranged above the floating cylinder 400, and the buoyancy drain pipe 420 is arranged below the floating cylinder 400. When it is necessary to increase the overall buoyancy of the bellows 100, air can be injected into the floating cylinder 400 through the buoyancy air inlet pipe 410, and the ballast water can be discharged through the buoyancy drain pipe 420. When reducing the overall buoyancy of the bellows 100, ballast water can be injected into the floating cylinder 400 through the buoyancy drain pipe 420, and the air can be discharged through the buoyancy air inlet pipe 410. Thus, the controllable adjustment of the overall buoyancy of the bellows 100 is realized.

[0057] In an embodiment of the present invention, the power assembly 500 includes: a driving member 510, a crank disk 520 and an eccentric crank 530. Among them, the driving member 510 and the guide plate 300 are used to be arranged on the top of the membrane pool, and the driving member 510 is a reduction motor; the crank disk 520 is connected to the output shaft of the driving member 510, and the driving member 510 is used to drive the crank disk 520 to rotate, and a connecting rod is arranged on the edge of the crank disk 520; one end of the eccentric crank 530 is hinged to the connecting rod on the crank disk 520, and the other end of the eccentric crank 530 is hinged to the bellows 100 through a spherical hinge connecting rod 540.

[0058] In this embodiment, the reduction motor serves as the driving member 510. By outputting rotational power with low speed and high torque, it drives the crank disk 520 connected to its output shaft to continuously rotate. One end of the connecting rod provided at the edge of the crank disk 520 is hinged to one end of the eccentric crank 530, and the connecting rod drives the eccentric crank 530 to perform eccentric rotational motion. One end of the spherical hinge connecting rod 540 is hinged to the eccentric crank 530 through a spherical hinge structure, and the other end of the spherical hinge connecting rod 540 is hinged to the moving wheel bracket 120 of the diaphragm box 100 through a spherical hinge structure. The spherical hinge structure can rotate freely. Since one end of the eccentric crank 530 is hinged to the crank disk 520 and the other end is hinged to the diaphragm box 100 through the spherical hinge connecting rod, the diaphragm box 100 realizes reciprocating motion along an arc trajectory under the constraint of the arc-shaped guide groove 310. Thus, the reciprocating motion of the diaphragm box 100 and the membrane module 200 in two directions, namely the horizontal direction and the vertical direction, is achieved. The water flow power directly acts on the membrane module 200, thereby forming a micro-scale eddy field, which can provide continuous mixing and stirring. Compared with intermittent aeration, the mass transfer effect is improved, and at the same time, fouling of the membrane filaments 215 and local over-thickening of the biofilm are effectively inhibited. In addition, the reciprocating operation mode can also achieve an operating condition with full flow field coverage, effectively improving the effective utilization rate of the membrane area compared with the hydraulic circulation operation mode.

[0059] In summary, for the reciprocating membrane aeration biofilm reactor of the present invention, by using the power assembly 500 to drive the diaphragm box 100 to reciprocate along the length direction of the arc-shaped guide groove 310, and the membrane module 200 to reciprocate synchronously with the diaphragm box 100 in the horizontal direction and the vertical direction, liquid-phase mixing in the membrane tank and control of the biofilm thickness can be realized, and the mass transfer effect and the utilization rate of the membrane area can be improved. In addition, by providing a buoyancy assembly to provide buoyancy for the diaphragm box 100 and arranging a downwardly curved arc-shaped guide groove 310 on the guide plate 300, the power assembly 500 and the buoyancy assembly form a dual-mode drag reduction system, which can form an inertial force compensation mechanism, realize the mutual conversion of kinetic energy and potential energy, reduce the frictional resistance, reduce the power consumption, and thus reduce the energy consumption.

[0060] Unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those of ordinary skill in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one. The terms "connected" or "coupled" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right" and the like are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0061] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A reciprocating membrane aeration biofilm reactor, characterized in that, Comprising: An aneroid box, with moving wheels arranged at the top of the aneroid box; A membrane module, which is arranged in the aneroid box; A guide rail plate, which is used to be arranged on a membrane tank. An arc-shaped guide rail groove matching with the moving wheels is arranged along the length direction of the guide rail plate, and the arc-shaped guide rail groove bends downward; A buoyancy assembly, which is arranged at the bottom of the aneroid box; A power assembly, which is used to be arranged on the membrane tank and connected to the aneroid box, and the power assembly is used to drive the aneroid box to reciprocate along the length direction of the arc-shaped guide rail groove.

2. The reciprocating membrane aeration biofilm reactor according to claim 1, characterized in that, The moving wheels are two groups relatively arranged on both sides of the top of the aneroid box, and the guide rail plates are two relatively distributed on both sides of the aneroid box. Each guide rail plate corresponds to a group of moving wheels. Each group of moving wheels includes a plurality of them arranged at intervals in sequence along the length direction of the guide rail plate. The arc-shaped guide rail grooves on each guide rail plate are multiple, and the moving wheels correspond to the arc-shaped guide rail grooves one by one.

3. The reciprocating membrane aeration biofilm reactor according to claim 1, characterized in that, The aneroid box is formed into a frame structure, and the aneroid box includes: A membrane module support, the membrane module is arranged in the membrane module support and connected to the membrane module support; A moving wheel support, which is located above the membrane module support and connected to the membrane module support, and the moving wheels are arranged on the moving wheel support; A buoyancy support, which is located below the membrane module support and connected to the membrane module support, and the buoyancy assembly is connected to the buoyancy support.

4. The reciprocating membrane aeration biofilm reactor according to claim 3, wherein, The membrane module includes: A plurality of membrane filament members, each membrane filament member is arranged vertically, and a plurality of membrane filament members are arranged at intervals in sequence in the aneroid box and their arrangement direction is perpendicular to the length direction of the guide rail plate; A main air distribution pipe, which is arranged above each membrane filament member and communicated with each membrane filament member respectively. A main air inlet pipe is arranged at the top of the main air distribution pipe; A main air collection pipe, which is arranged below each membrane filament member and communicated with each membrane filament member, and a main air outlet pipe is arranged at the bottom of the main air collection pipe.

5. The reciprocating membrane aeration biofilm reactor according to claim 4, wherein, Each membrane filament member respectively includes: An air distribution pipe, which is located at the top of the membrane filament member and its length direction is perpendicular to the main air distribution pipe. An air inlet pipe is arranged at the top of the air distribution pipe, and the air distribution pipe is connected to the air outlet of the main air distribution pipe through the air inlet pipe; An air collection pipe, which is located at the bottom of the membrane filament member and its length direction is perpendicular to the main air collection pipe. The air collection pipe is parallel and relatively arranged with the air distribution pipe, and an air outlet pipe is arranged at the bottom of the air collection pipe. The air collection pipe is connected to the air inlet of the main air collection pipe through the air outlet pipe; A plurality of membrane filaments, the plurality of membrane filaments are located between the air distribution pipe and the air collection pipe and arranged at intervals in sequence along the length direction of the air distribution pipe. Each membrane filament is arranged vertically, the upper end of each membrane filament is communicated with the air distribution pipe, and the lower end of each membrane filament is communicated with the air collection pipe.

6. The reciprocating membrane aeration biofilm reactor according to claim 1, characterized in that, The diameter of the moving wheel is smaller than the vertical distance from the upper surface to the lower surface of the arc-shaped guide rail groove.

7. The reciprocating membrane aeration biofilm reactor according to claim 1, wherein, The buoyancy assembly includes two floating cylinders, and the two floating cylinders are relatively arranged on both sides of the bottom of the aneroid box.

8. The reciprocating membrane aeration biofilm reactor according to claim 7, characterized in that Each of the buoyancy floats is respectively provided with a buoyancy air inlet pipe and a buoyancy drain pipe.

9. The reciprocating membrane aeration biofilm reactor according to claim 1, characterized in that, The power assembly includes: A driving member; A crank disc, the crank disc is connected to the output shaft of the driving member, the driving member is used to drive the crank disc to rotate, and a connecting rod is arranged at the edge of the crank disc; An eccentric crank, one end of the eccentric crank is hinged to the connecting rod on the crank disc, and the other end of the eccentric crank is hinged to the diaphragm box through a spherical hinge connecting rod.

10. The reciprocating membrane aeration biofilm reactor according to claim 9, wherein, The driving member and the guide rail plate are used to be arranged on the top of the diaphragm tank, and the driving member is a reduction motor.

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