Preparation method of dynamic MBR hollow fiber membrane module

Abstract

The invention relates to the technical field of hollow fiber membranes, and discloses a preparation method of a dynamic MBR (membrane bioreactor) hollow fiber membrane component, which comprises the following steps: hollowly connecting an impeller framework with a rim pipe by using a connector to obtain an impeller type membrane component; a plurality of hollow fibers are cast into hollow fiber bundles, one ends of the hollow fiber bundles are cast on the reserved opening of the porous pipe sleeve of the impeller framework, the other ends of the hollow fiber bundles are bundled and cast on the hollow rim, and a blade type hollow fiber membrane assembly is prepared; connecting a hollow rim of the blade type hollow fiber membrane module with a rim pipe of the impeller type membrane module to obtain a dynamic MBR hollow fiber membrane assembly; arranging a plurality of dynamic MBR hollow fiber membrane assemblies on a water guide pipe, and connecting in series to form a wheel row; and arranging a plurality of wheel rows in a staggered manner to complete the preparation of the dynamic MBR hollow fiber membrane module. The invention can solve the problems of low packing density of the existing rotary membrane component and easy blockage and pollution of the root of the existing curtain type membrane component, and greatly prolongs the service life of the membrane.

Description

Technical Field

[0001] This invention relates to the field of hollow fiber membrane technology, and more specifically, to a method for preparing a dynamic MBR hollow fiber membrane module. Background Technology

[0002] Membrane bioreactors (MBRs), as a novel and efficient wastewater treatment process combining membrane separation technology and activated sludge process, have been widely used in municipal wastewater treatment, industrial wastewater reuse, and high-standard discharge projects in recent years. However, with the extension of operating time, membrane modules generally face membrane fouling problems, becoming a key technical bottleneck restricting the further development of MBRs.

[0003] In existing applications, hollow fiber membranes are exposed to mixed solutions containing large amounts of suspended solids, colloidal substances, and bioflocs under hydraulic conditions for extended periods. These contaminants readily deposit and accumulate on the membrane surface. These deposits not only clog membrane pores and reduce the effective filtration area but also cause a continuous increase in transmembrane pressure, leading to severe membrane fouling. Ultimately, this results in decreased membrane flux, increased energy consumption, and more frequent cleaning. Frequent chemical cleaning and backwashing processes not only shorten the lifespan of membrane modules but also increase operating costs, hindering the promotion and large-scale application of membrane technology.

[0004] Existing MBR membrane modules are prone to severe sludge deposition and clogging on the membrane surface, especially at the membrane root, which leads to increased membrane fouling and makes it difficult to achieve a good balance between fouling control and high-efficiency filtration.

[0005] Therefore, it is necessary to design a method for preparing a dynamic MBR hollow fiber membrane module to produce a novel membrane module that combines high membrane area utilization, good anti-fouling performance, and low energy consumption operation, in order to solve the problems existing in the current technology. Summary of the Invention

[0006] In view of this, the present invention proposes a method for preparing a dynamic MBR hollow fiber membrane module, which aims to solve the problems of low filling density of existing rotating membrane modules and easy clogging and contamination at the root of current curtain membrane modules, and greatly improves the service life of the membrane.

[0007] In one aspect, the present invention proposes a method for preparing a dynamic MBR hollow fiber membrane module, comprising: An impeller-type membrane module is prepared by connecting the impeller frame to the hollow rim tube using a connector. Several hollow fibers are cast into hollow fiber bundles, and one end of several hollow fiber bundles is cast onto the reserved opening of the porous tube sleeve of the impeller skeleton, and the other end is bundled and cast onto the hollow wheel ring to obtain a blade-type hollow fiber membrane module. The hollow ring of the blade-type hollow fiber membrane module is connected to the rim tube of the impeller-type membrane module to obtain a dynamic MBR hollow fiber membrane assembly. Several of the aforementioned dynamic MBR hollow fiber membrane assemblies are arranged on a water guide pipe and connected in series to form a wheel row; By arranging several of the aforementioned wheel-shaped staggered arrangements, the preparation of the dynamic MBR hollow fiber membrane module is completed.

[0008] Furthermore, the impeller frame also includes three spoke supports. The three spoke supports are connected to the porous tube sleeve.

[0009] Furthermore, the three rim tubes divide the impeller-type membrane assembly into three equal regions, and the blade-type hollow fiber membrane assembly is installed in each region.

[0010] Furthermore, when several hollow fibers are cast into hollow fiber bundles and then cast onto the pre-reserved opening of the porous sleeve, Several hollow fibers are cast into a hollow fiber bundle in parallel and of equal length. Several hollow fiber bundles are cast in parallel and of equal length in an isosceles triangular shape onto the reserved opening of the porous sleeve.

[0011] Furthermore, when obtaining the dynamic MBR hollow fiber membrane assembly, a rigid connector is used to connect the hollow wheel ring of the blade-type hollow fiber membrane assembly with the hollow rim tube of the impeller-type membrane assembly.

[0012] Furthermore, the water guide pipe is rotatably connected to the central rotating shaft via an internal connector.

[0013] Furthermore, the water guide pipe is configured as the sole clean water outlet for the wheel assembly.

[0014] Furthermore, during the formation of the wheel arrangement, Several of the aforementioned dynamic MBR hollow fiber membrane modules are arranged at equal intervals on the water guide pipe, and the aforementioned dynamic MBR hollow fiber membrane modules are connected in series on the same hollow rotating shaft to form the wheel row.

[0015] Furthermore, the staggered arrangement specifically refers to arranging several of the wheel rows in a parallel and staggered embedded manner within the sewage tank.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The method for preparing a dynamic MBR hollow fiber membrane module provided by the present invention forms an impeller-type membrane module by connecting the impeller skeleton and the hollow rim tube. Combined with the blade-type module design where the two ends of the hollow fiber bundle are respectively cast with porous tube sleeves and hollow wheel rings, the module structure is compact and the water flow path is unobstructed, thereby improving the membrane filling density and filtration efficiency. By connecting the assembled components in series into a wheel row and driving the rotation by a motor, the shear force generated by the rotation reduces the adhesion of sludge on the surface of the hollow fibers, effectively alleviating membrane fouling and extending the service life of the module. The modular arrangement of the wheel row and the detachable connection of each component facilitate the installation, maintenance and replacement of the module. The overall membrane bioreactor can operate stably, comprehensively improving the practicality and operating efficiency of the dynamic MBR system.

[0017] On the other hand, the present invention proposes a dynamic MBR hollow fiber membrane module prepared by a method for preparing a dynamic MBR hollow fiber membrane module, comprising: a blade-type hollow fiber membrane module, an impeller-type membrane module, a water guide pipe, and a central rotating shaft; The blade-type hollow fiber membrane module includes several hollow fiber bundles, a porous tube sleeve, and a hollow wheel ring. One end of each hollow fiber bundle is cast into a reserved opening in the porous tube sleeve, and the other end is bundled and cast into the hollow wheel ring. The impeller-type membrane assembly includes an impeller frame, several rim tubes, and a connector, wherein the connector is used to connect the impeller frame and the rim tubes. The hollow wheel ring of the blade-type hollow fiber membrane module is hollowly connected to the rim tube of the impeller-type membrane module, and the porous tube sleeve of the blade-type hollow fiber membrane module is hollowly connected to the water guide pipe. The water guide pipe is connected to the central rotating shaft.

[0018] It is understandable that the above-mentioned dynamic MBR hollow fiber membrane module and its preparation method have the same or similar beneficial effects, and will not be elaborated further. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A flowchart of a method for preparing a dynamic MBR hollow fiber membrane module provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the impeller-type membrane module structure of a dynamic MBR hollow fiber membrane module. Figure 3This is a schematic diagram of the structure of a dynamic MBR hollow fiber membrane module. Figure 4 This is a schematic cross-sectional view of a hollow fiber membrane module in a dynamic MBR. Figure 5 This is a top view of a hollow fiber membrane module for a dynamic MBR. Figure 6 Schematic diagram of the wheel arrangement of hollow fiber membrane modules in dynamic MBR Figure 2 ; Figure 7 Schematic diagram of the wheel arrangement of hollow fiber membrane modules in dynamic MBR Figure 2 ; Among them, 1-perforated sleeve, 2-spoke support, 3-rim tube, 4-hollow fiber membrane bundle, 5-water guide pipe, 6-central shaft, 7-connector, 8-inner tube connector, 9-hollow wheel rim. Detailed Implementation

[0020] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] See Figure 1 As shown in some embodiments of this application, this embodiment provides a method for preparing a dynamic MBR hollow fiber membrane module, including the following steps: S100: An impeller-type membrane module is made by connecting the impeller frame to the hollow rim tube using a connector. S200: Several hollow fibers are cast into hollow fiber bundles, and one end of several hollow fiber bundles is cast onto the reserved opening of the porous tube sleeve of the impeller skeleton, and the other end is bundled and cast onto the hollow wheel ring to obtain a blade-type hollow fiber membrane module. S300: Connect the hollow ring of the blade-type hollow fiber membrane module to the rim tube of the impeller-type membrane module to obtain a dynamic MBR hollow fiber membrane assembly. S400: By arranging several rounds of hollow fiber membrane modules in a staggered manner, the preparation of the dynamic MBR hollow fiber membrane module is completed.

[0022] Specifically, in the S100, a suitable impeller frame and rim tube are selected, and a connector is used to hollowly connect the two, ensuring a sealed connection and smooth water flow. The installation positions of the impeller frame and rim tube are perfectly matched, and the connector completely covers the connection surface of the impeller frame and rim tube, ensuring structural stability and preventing loosening or leakage during use.

[0023] Understandably, the hollow connection between the impeller frame and the rim tube is achieved through the connector, which not only provides support for the subsequent installation of blade-type components, but also constructs a preliminary outlet channel for the filtered water, ensuring unobstructed water flow and laying the structural foundation for efficient filtration.

[0024] Specifically, the impeller frame also includes three spoke supports.

[0025] Specifically, the three spoke supports are connected to the porous tube sleeve.

[0026] Specifically, the three rim tubes divide the impeller-type membrane module into three equal areas, and each area is equipped with a blade-type hollow fiber membrane module.

[0027] Specifically, the impeller frame is first assembled, and one end of each of the three spoke supports is fixedly connected to the corresponding position on the outer wall of the porous sleeve, ensuring a firm connection and a radially even distribution. Then, three rim tubes are selected, and each rim tube is hollowly connected to the other end of the corresponding spoke support through a connector, so that the three rim tubes form a ring structure around the porous sleeve, and the connection is well sealed, allowing water to flow smoothly, thus completing the preparation of the impeller membrane module.

[0028] Understandably, the connection between the three spoke supports and the porous tube sleeve forms a stable radial support structure, effectively dispersing the pressure and impact force borne by the component during operation and preventing frame deformation. The hollow connection between the spoke supports and the rim tube not only achieves structural fixation but also constructs a water guiding channel for the filtered water, laying the foundation for subsequent filtration and water discharge.

[0029] Specifically, three blade-type hollow fiber membrane modules are prepared according to the dimensions of the three equally divided regions of the impeller-type membrane module, with the number and length of hollow fiber bundles in each module adapted to the corresponding region.

[0030] Understandably, the three equally divided areas correspond to the installation of three blade-type components, which makes the filtration layout uniform and reasonable, maximizes the use of the space of the impeller membrane module, and improves the membrane packing density; the independent filtration and water guiding design of each area avoids mutual interference of water flow in different areas, ensures stable filtration efficiency, and provides convenience for subsequent modular maintenance.

[0031] Specifically, in S200, when several hollow fibers are cast into hollow fiber bundles, and these hollow fiber bundles are cast onto the reserved openings of the porous sleeve, Several hollow fibers are cast into a hollow fiber bundle in parallel and of equal length. Several hollow fiber bundles are cast in parallel and of equal length in an isosceles triangular shape onto the reserved opening of the porous sleeve.

[0032] Specifically, several hollow fibers are selected, arranged in parallel with the same length, and then cast to form hollow fiber bundles. One end of each set of hollow fiber bundles is cast into the pre-reserved opening of the porous sleeve of the impeller frame to ensure that the fiber bundles are tightly bonded to the porous sleeve and that the hollow channels are unobstructed. The other ends of all the hollow fiber bundles are bundled in pairs, concentrated, and cast onto the hollow wheel ring to form isosceles triangles, so that the fiber bundles maintain a regular shape and complete the preparation of the blade-type hollow fiber membrane module.

[0033] Understandably, the hollow fiber bundle serves as the core of the filter, enabling wastewater filtration. The parallel and equal-length design ensures a uniform filtration area. Both ends are fixed to the porous sleeve and the hollow wheel ring respectively by casting, ensuring structural stability and allowing the filtration channels of each hollow fiber to be connected to the subsequent water guiding system, thus preventing water stagnation.

[0034] Specifically, in S300, the hollow wheel ring of the blade-type hollow fiber membrane module obtained in S200 is connected to the rim tube of the impeller-type membrane module obtained in S100 to ensure that the connection part is hollow and well sealed, with no water leakage, thus forming an independent dynamic MBR hollow fiber membrane assembly.

[0035] Specifically, a rigid connector is used to connect the hollow ring of the blade-type hollow fiber membrane module with the hollow rim tube of the impeller-type membrane module.

[0036] Understandably, by connecting the hollow wheel rim to the wheel rim tube, the water filtered by the blade-type component can flow smoothly into the wheel rim tube, completing the "filtration-water guiding" functional connection. Each assembly can independently achieve filtration and water guiding, providing a foundation for subsequent modular integration.

[0037] Specifically, in S400, several dynamic MBR hollow fiber membrane assemblies prepared in S300 are selected, arranged sequentially on the water pipe and fixed in series to form a wheel row; several wheel rows are arranged in a staggered manner so that the assemblies of adjacent wheel rows do not block each other, and finally the preparation of the dynamic MBR hollow fiber membrane module is completed.

[0038] Understandably, the staggered arrangement design can increase the contact area between the filter wheel and the wastewater, avoid dead zones in water flow, and improve filtration efficiency; multiple assemblies are connected in series to form the filter wheel, realizing the large-scale integration of filter units to meet the needs of different treatment volumes, while the modular arrangement facilitates subsequent maintenance and partial replacement.

[0039] As can be seen, this invention significantly increases the filling density of hollow fibers and the wastewater contact area through modular assembly and staggered arrangement design, thereby improving filtration efficiency. The hollow connections between components create smooth water flow channels, reducing water flow resistance and stagnation. The modular structure of the wheel arrangement allows for independent disassembly and replacement of components, reducing maintenance difficulty and cost. Combined with the rotary drive design, it can peel off contaminants from the membrane surface through shear force, effectively alleviating membrane fouling and extending the service life of the components. The overall structural design is reasonable, the operation process is simple, and it takes into account practicality, stability, and economy, which is conducive to the promotion and large-scale application of MBR technology.

[0040] See Figure 1 As shown, in some embodiments of this application, the water guide pipe is rotatably connected to the central rotating shaft through an inner pipe connector.

[0041] Specifically, select an inner pipe connector that matches the inner diameter of the water pipe and the outer diameter of the central rotating shaft. Embed one end of the inner pipe connector into the end of the water pipe and fix the contact surface between the connector and the water pipe with an annular seal to ensure a sealed connection. Insert the end of the central rotating shaft into the other end of the inner pipe connector and adjust the fitting clearance to ensure that the two fit tightly and can rotate flexibly relative to each other. At the same time, ensure that the internal hollow channels of the water pipe and the central rotating shaft are completely connected without obstruction or misalignment.

[0042] Understandably, the built-in design of the pipe connector avoids interference from external impurities and frictional wear, and the seals ensure no water leakage during rotation; the rotating adapter structure reduces rotational resistance and ensures smooth rotation of the wheel; and the through-hole channel lays the foundation for centralized water outflow.

[0043] Specifically, the water pipe is set as the only clean water outlet for the wheel-type pump.

[0044] It is understandable that the water pipe is designated as the only clean water outlet for the wheel, and all other potential water outlet paths of all assemblies are closed except for those connected to the water pipe, ensuring that all filtered water can only be discharged through the water pipe.

[0045] Understandably, the design of a single clean water outlet avoids water flow dispersion, concentrates water flow, improves water guiding efficiency, and reduces the risk of leakage caused by multiple outlets.

[0046] Understandably, the built-in design of the pipe connector reduces external friction and impurity interference, the rotating adapter structure reduces rotational resistance, and the seals ensure that there is no risk of water leakage at the connection point; the through-hole hollow channel ensures that the filtered water can flow smoothly out of the water guide pipe without affecting the water guiding efficiency.

[0047] See Figure 1As shown, in some embodiments of this application, several dynamic MBR hollow fiber membrane modules are arranged equidistantly on a water guide pipe, and several dynamic MBR hollow fiber membrane modules are connected in series on the same hollow rotating shaft to form a wheel row.

[0048] Specifically, staggered arrangement means arranging several wheel-shaped arrays in a parallel and staggered embedded manner within the sewage tank.

[0049] Specifically, several dynamic MBR hollow fiber membrane assemblies are arranged at equal intervals and connected in series on a water guide pipe that has been connected to a central rotating shaft to form a wheel row; several wheel rows are staggered in the sewage tank, and a motor is set outside the tank and connected to the central rotating shaft. The motor can drive the wheel rows to rotate, thereby driving the operation of the dynamic MBR hollow fiber membrane module.

[0050] Understandably, the series integration of the wheel arrays enables large-scale filtration, and the staggered arrangement increases the contact area with wastewater; the motor transmits power through the central shaft, driving the wheel arrays to rotate, using shear force to peel off pollutants from the membrane surface, and the rotation of the internal connectors ensures a smooth and stable rotation process.

[0051] Understandably, in practical use, the wheel arrays are arranged in the sewage tank. Each wheel array rotates at a certain speed under the action of a motor outside the tank, or the rotation is started when sludge on the hollow fiber is attached due to gravity. After being filtered by the hollow fiber bundles, the sewage flows through the rim tube and the spoke support body. The filtered water in the rim tube flows through the spoke support body and finally merges into the water guide pipe. The filtered water is then discharged through the water guide pipe of the hollow rotating shaft.

[0052] As can be seen, this invention achieves a rotatable connection between the water guide pipe and the central rotating shaft through an internal connector. The built-in design avoids the frictional loss and sealing failure issues associated with external connections, reducing component operating resistance and leakage risk, and extending the service life of transmission components. The internal connector ensures complete connectivity between the hollow channel of the water guide pipe and the central rotating shaft, without interfering with the flow of filtered water. Combined with the single purified water outlet design of the water guide pipe, this improves water guiding efficiency. This connection method is compatible with the impeller frame's spoke support structure and three-part division layout, further enhancing the overall structural stability and filtration uniformity of the component, making the impeller rotation smoother, the self-cleaning effect more significant, and effectively mitigating membrane fouling. Simultaneously, the modular design and the adaptability of the rotatable connection facilitate the installation, maintenance, and partial replacement of the component, reducing operating and maintenance costs. Overall, this improves the practicality, stability, and economy of the dynamic MBR hollow fiber membrane module, contributing to the large-scale promotion and application of MBR technology. See Figure 2-7 As shown, in another embodiment of this application, a dynamic MBR hollow fiber membrane module is prepared according to a method for preparing a dynamic MBR hollow fiber membrane module, including: a blade-type hollow fiber membrane module, an impeller-type membrane module, a water guide pipe 5, and a central rotating shaft 6.

[0053] Specifically, the blade-type hollow fiber membrane module includes several hollow fiber bundles 4, a porous sleeve 1, and a hollow ring 9. One end of the several hollow fiber bundles 4 is cast into the reserved opening of the porous sleeve 1, and the other end is bundled and cast into the hollow ring 9.

[0054] The impeller-type membrane module includes an impeller frame, several rim tubes 3 and a connector 7, which is used to connect the impeller frame and the rim tubes 3.

[0055] The hollow ring 9 of the blade-type hollow fiber membrane module is hollowly connected to the rim tube 3 of the impeller-type membrane module, and the porous tube sleeve 1 of the blade-type hollow fiber membrane module is hollowly connected to the water guide pipe 5.

[0056] The water guide pipe 5 is connected to the central rotating shaft 6 through the hollow inner connector 8.

[0057] Specifically, the impeller frame consists of a spoke support 2 and a porous sleeve 1.

[0058] It is understandable that a dynamic MBR hollow fiber membrane module and its preparation method have the same or similar beneficial effects, which will not be elaborated further.

[0059] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program goods. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program goods embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0060] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program goods according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0061] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0062] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for preparing a dynamic MBR hollow fiber membrane module, characterized in that, include: An impeller-type membrane module is prepared by connecting the impeller frame to the hollow rim tube using a connector. Several hollow fibers are cast into hollow fiber bundles, and one end of several hollow fiber bundles is cast onto the reserved opening of the porous tube sleeve of the impeller skeleton, and the other end is bundled and cast onto the hollow wheel ring to obtain a blade-type hollow fiber membrane module. The hollow ring of the blade-type hollow fiber membrane module is connected to the rim tube of the impeller-type membrane module to obtain a dynamic MBR hollow fiber membrane assembly. Several of the aforementioned dynamic MBR hollow fiber membrane assemblies are arranged on a water guide pipe and connected in series to form a wheel row; By arranging several of the aforementioned wheel-shaped staggered arrangements, the preparation of the dynamic MBR hollow fiber membrane module is completed.

2. The method for preparing a dynamic MBR hollow fiber membrane module according to claim 1, characterized in that, The impeller frame also includes three spoke supports. The three spoke supports are connected to the porous tube sleeve.

3. The method for preparing a dynamic MBR hollow fiber membrane module according to claim 1, characterized in that, The three rim tubes divide the impeller-type membrane assembly into three equal regions, and the blade-type hollow fiber membrane assembly is installed in each region.

4. The method for preparing a dynamic MBR hollow fiber membrane module according to claim 3, characterized in that, Several hollow fibers are cast into hollow fiber bundles, and these hollow fiber bundles are then cast onto the pre-reserved openings of the porous sleeve. Several hollow fibers are cast into a hollow fiber bundle in parallel and of equal length. Several hollow fiber bundles are cast in parallel and of equal length in an isosceles triangular shape onto the reserved opening of the porous sleeve.

5. The method for preparing a dynamic MBR hollow fiber membrane module according to claim 4, characterized in that, When obtaining the dynamic MBR hollow fiber membrane assembly, a rigid connector is used to connect the hollow wheel ring of the blade-type hollow fiber membrane assembly with the hollow rim tube of the impeller-type membrane assembly.

6. The method for preparing a dynamic MBR hollow fiber membrane module according to claim 5, characterized in that, The water guide pipe is rotatably connected to the central rotating shaft through an internal connector.

7. The method for preparing a dynamic MBR hollow fiber membrane module according to claim 6, characterized in that, The water guide pipe is set as the only clean water outlet for the wheel row.

8. The method for preparing a dynamic MBR hollow fiber membrane module according to claim 7, characterized in that, When forming the wheel arrangement Several of the aforementioned dynamic MBR hollow fiber membrane modules are arranged at equal intervals on the water guide pipe, and the aforementioned dynamic MBR hollow fiber membrane modules are connected in series on the same hollow rotating shaft to form the wheel row.

9. The method for preparing a dynamic MBR hollow fiber membrane module according to claim 8, characterized in that, The staggered arrangement specifically refers to arranging several of the wheel rows in a parallel and staggered embedded manner within the sewage tank.

10. A dynamic MBR hollow fiber membrane module prepared by the method for preparing a dynamic MBR hollow fiber membrane module according to any one of claims 1-9, comprising: Blade-type hollow fiber membrane module, impeller-type membrane module, water guide pipe and central rotating shaft; The blade-type hollow fiber membrane module includes several hollow fiber bundles, a porous tube sleeve, and a hollow wheel ring. One end of each hollow fiber bundle is cast into a reserved opening in the porous tube sleeve, and the other end is bundled and cast into the hollow wheel ring. The impeller-type membrane assembly includes an impeller frame, several rim tubes, and a connector, wherein the connector is used to connect the impeller frame and the rim tubes. The hollow wheel ring of the blade-type hollow fiber membrane module is hollowly connected to the rim tube of the impeller-type membrane module, and the porous tube sleeve of the blade-type hollow fiber membrane module is hollowly connected to the water guide pipe. The water guide pipe is connected to the central rotating shaft.

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