Replaceable membrane bundle, suspension type membrane wire assembly and membrane stack reactor

Abstract

The utility model discloses a replaceable membrane bundle which comprises a plurality of rigid membrane filaments with hollow interiors, the adjacent rigid membrane filaments at the fixed end are hardened through sealing glue, the interiors of the rigid membrane filaments are hollow, the adjacent rigid membrane filaments at the free end are mutually independent, and the end face of each rigid membrane filament is in a sealing glue state. The utility model further discloses a suspension type membrane wire assembly which comprises a plurality of flexible membrane wires, and the flexible membrane wires are independent of one another and are suspended on the suspension frame in a U shape. The utility model also discloses a membrane stack reactor, which comprises a mounting rack, an aeration pipe and a plurality of replaceable membrane bundles or suspension type membrane wire assemblies, the fixed ends of the replaceable membrane bundles are connected with the membrane shell or the lower ends of the flexible membrane wires are connected with the membrane shell, the aeration pipe is arranged on the membrane shell, and the membrane shell is detachably connected with the mounting rack. By providing two modular membrane assemblies (replaceable membrane bundle and suspension type membrane filament assemblies), the mounting requirements of membrane filaments of different materials are met; meanwhile, the aeration and water production efficiency is ensured through the design of an independent flow channel for gas-water separation.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a replaceable membrane bundle, a suspended membrane fiber assembly, and a membrane stack reactor. Background Technology

[0002] Existing MBR membrane modules generally suffer from the following problems: 1. External aeration components result in low aeration efficiency and high maintenance costs: Traditional membrane bundles use an integral structure with fixed ends, which easily leads to sludge accumulation at both ends. Damage to some parts of the structure requires replacement of the entire membrane bundle module, generating a large amount of solid waste; 2. Low installation flexibility: The membrane fiber layout is limited and cannot accommodate the installation requirements of different materials (such as rigid and flexible membrane fibers). Therefore, improvements are needed. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a replaceable membrane bundle, a suspended membrane fiber assembly, and a membrane stack reactor.

[0004] The present invention provides a replaceable membrane bundle comprising multiple hollow rigid membrane filaments. The two ends of the replaceable membrane bundle are a fixed end and a free end, respectively. The adjacent rigid membrane filaments at the fixed end are hardened by sealing and each rigid membrane filament is hollow inside. The adjacent rigid membrane filaments at the free end are independent of each other and the end face of each rigid membrane filament is sealed.

[0005] The present invention also provides a suspended membrane fiber assembly, comprising multiple flexible membrane fibers, each of which is independent and suspended in a U-shape on a suspension, the suspension being arranged perpendicular to the axial direction of the flexible membrane fiber.

[0006] The present invention also provides a membrane stack reactor, including a mounting frame, an aeration pipe, and several replaceable membrane bundles or suspended membrane filament assemblies of the present invention. The fixed end of the replaceable membrane bundle is connected to the membrane shell, or the lower end of the flexible membrane filament is connected to the membrane shell. The membrane shell is provided with an aeration pipe, and the membrane shell is detachably connected to the mounting frame.

[0007] Furthermore, the mounting frame includes a water collection shell, the upper end of which is detachably connected to the membrane shell. The water collection shell is provided with an air inlet pipe that communicates with the aeration pipe. The water collection shell is also provided with a water collection chamber for holding the purified water filtered by the replaceable membrane bundle. The water collection chamber and the air inlet pipe are independent of each other.

[0008] Furthermore, the mounting frame also includes a gas distribution shell connected to the bottom of the water collection shell. The gas distribution shell is provided with an aeration nozzle, which extends downward and connects to the sewage outlet. The aeration nozzle has a "trumpet mouth" structure.

[0009] Furthermore, multiple water collection shells are arranged side by side and interconnected to form an upper mounting base, and multiple gas distribution shells are arranged side by side and interconnected to form a lower mounting base, with the upper mounting base and the lower mounting base connected together.

[0010] Furthermore, the water collection shell and the corresponding gas distribution shell at the lower end are integrally formed as an installation component, and multiple installation components are connected side by side, with adjacent water collection shells and adjacent gas distribution shells interconnected.

[0011] Furthermore, multiple replaceable membrane bundles are installed side-by-side laterally to form a rectangular array. A support tube is provided on each of the left and right edges of the array, or a support tube is provided on each of the left and right edges of the suspended membrane fiber assembly. The support tubes are hollow and communicate with the water collection shell. The support tubes are parallel to the replaceable membrane bundles or parallel to the flexible membrane fibers in the suspended membrane fiber assembly. Furthermore, at least one transverse guardrail frame is connected between the support tubes. The guardrail frame is perpendicular to the axis of the replaceable membrane bundles, and its two ends are fixed to the support tubes on the left and right sides, respectively. The guardrail frame contains several partitions perpendicular to the frame, evenly distributed along the membrane bundle arrangement direction, used to divide the side-by-side replaceable membrane bundles into independent units.

[0012] Furthermore, when a suspended membrane fiber assembly is used, the suspension is arranged between the support tubes, and the suspension member is a clip or a collar, and the flexible membrane fiber is detachably fixed to the suspension member.

[0013] The above technical solution has the following beneficial effects:

[0014] This invention provides two types of modular membrane modules (replaceable membrane bundles and suspended membrane fiber modules) to adapt to the installation requirements of membrane fibers of different materials; at the same time, the independent flow channel design for gas-water separation ensures aeration and water production efficiency. Attached Figure Description

[0015] The disclosure of this utility model will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a membrane stack reactor with a suspended membrane fiber assembly in one embodiment of the present invention;

[0017] Figure 2 yes Figure 1 Enlarged view of point A in the medium-film reactor;

[0018] Figure 3 yes Figure 1 Enlarged view of point B in the medium-film reactor;

[0019] Figure 4 This is a schematic diagram of the structure of a membrane stack reactor with a membrane bundle assembly in one embodiment of the present invention;

[0020] Figure 5 yes Figure 4 Enlarged view of point C in the medium-film reactor;

[0021] Figure 6 This is a schematic diagram of the structure of a membrane stack reactor with a membrane bundle assembly in one embodiment of the present invention;

[0022] Figure 7 yes Figure 6 Enlarged view of point D in the medium-film reactor.

[0023] Reference table for attached figures:

[0024] 1. Rigid membrane fiber; 2. Membrane shell; 3. Flexible membrane fiber; 4. Suspension; 5. Aeration pipe; 6. Water collection shell; 601. Air inlet pipe; 602. Water collection chamber; 7. Gas distribution shell; 71. Aeration nozzle; 8. Upper mounting base; 9. Lower mounting base; 10. Mounting component; 11. Support pipe; 12. Guardrail frame. Detailed Implementation

[0025] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0026] It is readily understood that, based on the technical solution of this utility model, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0027] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meanings of the above-mentioned components within this utility model according to the specific circumstances.

[0029] In some embodiments of this utility model, such as Figure 4-7 It includes multiple hollow rigid membrane filaments 1. The two ends of the replaceable membrane bundle are fixed ends and free ends, respectively. The adjacent rigid membrane filaments 1 at the fixed ends are hardened by sealing and each rigid membrane filament 1 is hollow inside. The adjacent rigid membrane filaments 1 at the free ends are independent of each other and the end face of each rigid membrane filament 1 is sealed.

[0030] Specifically, such as Figure 4-7 The structure consists of multiple rigid membrane fibers 1, which are sealed and hardened using silicone or epoxy resin. One end is fixed to the membrane shell 2 by the sealant, providing rigid support and ensuring the stability of the membrane fibers during filtration. However, the interior of each membrane fiber is not sealed, remaining hollow; this end is the fixed end. The other end has the interior of each membrane fiber sealed, but the membrane fibers are independent of each other; this end is the free end. Spacing is reserved between the membrane fibers, allowing the free end to swing freely under the impact of water flow or aeration. When the free end swings, the top of the membrane fibers generates periodic disturbances, creating a "wave-by-wave" anti-accumulation effect. The independence of each rigid membrane fiber 1 avoids friction or entanglement between the membrane fibers, while simultaneously expanding the water flow channels, increasing the turbulence intensity during aeration, and further enhancing sludge flushing efficiency. In addition, the rigid membrane wire 1 is made of relatively stiff membrane wire. The rigid membrane wire 1 is self-supported by the fixed end of the membrane shell 2, eliminating the need for auxiliary structures such as the suspension 4, which simplifies the installation process. The membrane wire is installed upright in the membrane shell 2, and the fixed end is provided with rigid support through the membrane shell 2.

[0031] Meanwhile, the innovative design of membrane housing 2 enables the convenient removal of the entire membrane bundle from the mounting frame. Membrane housing 2 and the membrane fibers are directly connected by adhesive, with connecting components on membrane housing 2. Membrane housing 2 features a quick-connect connector that precisely matches the corresponding socket on the mounting frame. A simple pressing and rotating operation allows for a tight connection or quick separation. Additionally, the fixed end of the replaceable membrane bundle can be connected to membrane housing 2, or the lower end of the flexible membrane fiber 3 can be connected to membrane housing 2. Membrane housing 2 is equipped with an aeration pipe 5, which has air holes.

[0032] In some embodiments of this utility model, such as Figure 1-3It includes multiple flexible membrane filaments 3, each of which is independent and suspended in a U-shape on a suspension 4, which is set perpendicular to the axis of the flexible membrane filaments 3.

[0033] Specifically, such as Figure 1-3 Each membrane filament is U-shaped, with its top end fixed to the suspension frame 4 via a suspension component (such as a clip, collar, or hook), while the bottom end hangs freely, forming a "fixed top, free bottom" configuration. The suspension frame 4 is positioned perpendicular to the membrane filament axis and is typically a metal or engineering plastic rod with a smooth surface to reduce membrane filament wear. The suspension components are designed to be detachable, such as elastic clips or magnetic hangers, facilitating the installation and replacement of individual membrane filaments. Simultaneously, the membrane filament is made of a flexible material, possessing good flexibility and bending resistance, allowing the bottom end to swing freely in the water flow. Multiple membrane filaments are suspended side-by-side on the same suspension frame 4, forming a vertical curtain-like array. Both ends of the suspension frame 4 are fixed to support pipes 11 on the left and right sides (parallel to the membrane filaments). The support pipes 11 are hollow structures, connecting to the water collection shell 6, and serving both structural support and permeate collection functions. The aeration pipe 5 is located below the free end of the membrane filament (usually at the bottom of the membrane stack reactor) and connects to the air inlet channel. Compressed air enters through aeration nozzle 71 and is evenly distributed to aeration pipe 5 via gas distribution shell 7, releasing bubbles upwards from the bottom of the membrane fibers. The lower end of the flexible membrane fibers 3 oscillates under the impact of airflow, washing away sludge on the surface of the membrane fibers and delaying membrane fouling. The U-shaped structure exposes both sides of the membrane fibers to the aeration area, improving washing efficiency. Wastewater permeates through the micropores of the membrane fibers under negative pressure, and purified water flows through the water collection shell 6 (product water tank) into which the membrane fibers converge, and is discharged through the hollow channel in the support pipe 11.

[0034] Technical Effects: The free swinging of the lower end of the membrane fibers effectively breaks down the sludge deposits on the surface of the fibers, especially avoiding the "sludge cap" problem that easily forms at the top of traditional fixed membrane fibers. Compared with fixed membrane fibers, the sludge accumulation rate of flexible membrane fibers 3 is reduced. Damaged membrane fibers can be removed by loosening the suspension components. The replacement process does not require stopping the machine or disassembling the entire assembly. It eliminates the need to use silicone or epoxy resin to fix the membrane fibers, avoiding the membrane fiber detachment problem caused by aging of the adhesive sealant in traditional processes. The swinging characteristics of flexible membrane fibers 3 are suitable for treating wastewater containing high suspended solids or colloids (such as food processing wastewater and municipal sewage); the self-cleaning effect generated by the swinging can reduce the aeration intensity.

[0035] In some embodiments of this utility model, such as Figure 7 The mounting frame includes a water collection shell 6, the upper end of which is detachably connected to the membrane shell 2. The water collection shell 6 is provided with an air inlet pipe 601 that communicates with the aeration pipe 5. The water collection shell 6 is provided with a water collection chamber 602 for holding the purified water after the replacement membrane bundle filtration. The water collection chamber 602 and the air inlet pipe 601 are independent of each other.

[0036] Specifically, such as Figure 7The water collection shell 6 is the core structure of the mounting frame in the membrane stack reactor. Its key feature is the gas-water separation achieved through an independent flow channel design, ensuring that the aeration and product water processes do not interfere with each other. The upper end of the water collection shell 6 is detachably connected to the membrane shell 2 (membrane bundle fixing end) via a flange, snap-fit, or threaded structure, forming a modular structure that facilitates quick replacement of the membrane bundle (e.g., membrane shell 2 can be removed by loosening the bolts), while ensuring a sealed connection (usually using O-rings) to prevent product water leakage. An independent pipe is located inside the water collection shell 6, connecting to the aeration pipe 5 at the bottom of the membrane stack, ensuring a sealed connection (usually using O-rings) to deliver compressed air required for aeration. The airflow path is: compressed air → air inlet pipe 601 → aeration pipe 5 → membrane fiber surface (washing away contaminants). The independent cavity inside the water collection shell 6 is used to collect the purified water after filtration by the membrane fibers; the water flow path is: wastewater → membrane fiber micropores → water collection chamber 602 → product water outlet. Membrane housing 2 and water collection housing 6 are detachably connected. When the membrane fibers age or break, only the membrane bundle and membrane housing 2 need to be replaced, without disassembling the entire mounting frame.

[0037] In some embodiments of this utility model, such as Figure 7 The mounting frame also includes a gas distribution shell 7 connected to the bottom of the water collection shell 6. The gas distribution shell 7 is provided with an aeration nozzle 71. The aeration nozzle 71 extends upward to connect with the air inlet pipe 601 and extends downward to connect with the sewage outlet. The aeration nozzle 71 has an "expansion-contraction-re-expansion" structure.

[0038] Specifically, such as Figure 7 The gas distribution shell 7 and aerator nozzle 71 are the aeration structure design of the mounting frame in the membrane reactor, and are also key components for achieving efficient aeration. Their "expansion-contraction-re-expansion" structure is the core technology. Layered layout: The gas distribution shell 7 is located at the bottom of the water collection shell 6. The two are detachably connected by flanges, clips, or threads for easy independent maintenance. The water collection shell 6 is responsible for collecting purified water (product water tank), while the gas distribution shell 7 focuses on distributing the aeration gas to ensure gas-water separation. "Expansion-contraction-re-expansion" flow channel: The cross-section of the aerator nozzle 71 is in the shape of "flare mouth → narrow neck → flare mouth": Expansion section (inlet): Increases the gas inlet area, reduces the airflow velocity, and stabilizes the gas pressure; Contraction section (narrow neck): The cross-section shrinks, the gas velocity surges, forming a high-speed jet; Re-expansion section (outlet): The area expands again, the airflow diffuses evenly, and the pressure rises. Airflow path: Compressed air → Aerator nozzle 71 inlet (expansion section) → Narrow neck acceleration → Re-expansion section homogenization → Air inlet pipe 601 → Aeration pipe 5 → Membrane fiber surface. Ordinary aerator nozzles 71 are prone to uneven gas distribution, insufficient local flushing of membrane fibers, and serious sludge accumulation; the "expansion-contraction-re-expansion" structure evenly diffuses the high-speed airflow to the entire gas distribution shell 7, improving the aeration coverage of the membrane fiber surface and avoiding local blockage.

[0039] In some embodiments of this utility model, such as Figure 6-7 Multiple water collection shells 6 are arranged side by side and interconnected to form an upper mounting base 8, and multiple gas distribution shells 7 are arranged side by side and interconnected to form a lower mounting base 9. The upper mounting base 8 and the lower mounting base 9 are connected.

[0040] Specifically, such as Figure 6-7 The system achieves flexible expansion and efficient maintenance through the modular integrated design of the membrane reactor mounting frame, which integrates the water collection shell 6 and the gas distribution shell 7 into a single unit. The upper mounting base 8 and lower mounting base 9 are formed as follows: Upper mounting base 8: Consists of multiple water collection shells 6 arranged side-by-side, connected into a single structure using an integrated molding process (such as injection molding, die casting, or welding). Each water collection shell 6 has an independently installed water collection chamber 602 and an air inlet pipe 601. Adjacent water collection shells 6 are connected to adjacent water collection chambers 602 through interfaces, forming a unified product water collection channel. Lower mounting base 9: Multiple gas distribution shells 7 are also integrally molded side-by-side, integrating their respective aerators 71 and internal flow channels, allowing compressed air to be evenly distributed among the gas distribution shells 7 and ultimately delivered to the air inlet pipe 601 through the aerators 71. The upper mounting base 8 and lower mounting base 9 are assembled using a detachable connection structure (such as flange connection, snap-fit ​​quick coupling, or threaded connection). This connection method ensures both installation stability and ease of disassembly and maintenance. The upper and lower mounting bases 9 can be quickly separated according to actual needs, allowing for inspection and replacement of the water collection shell 6 or gas distribution shell 7. Water production process: After being filtered through the membrane bundle, the purified water flows into the collection chambers 602 of each water collection shell 6. Because the water collection shells 6 in the upper mounting base 8 are interconnected, the purified water can flow freely between the collection chambers 602 and is finally discharged through a unified outlet, achieving efficient water production and collection. Aeration process: Compressed air enters the gas distribution shell 7 from the aeration nozzle 71. The gas distribution shell 7, connected in the lower mounting base 9, evenly distributes the air to each air inlet pipe 601, and then delivers it to the aeration pipe 5 to aerate and flush the membrane fibers, ensuring uniform aeration throughout the entire membrane reactor and effectively preventing membrane fiber fouling.

[0041] Technical Benefits: The processing capacity of the membrane reactor can be easily adjusted by increasing or decreasing the number of water collection shells 6 and gas distribution shells 7. For example, fewer modules can be used to treat small-scale wastewater, while the number of modules can be increased to treat large-scale wastewater without redesigning the overall structure. When expanding municipal wastewater treatment plants or increasing the volume of industrial wastewater treatment, new modules can be directly connected in parallel on the existing mounting base, significantly shortening the construction cycle. Integrated Molding Process: This reduces the assembly process of individual components, lowering labor and time costs in the production process. At the same time, the integrated molding structure reduces the number of connectors, lowers the risk of leakage, and improves system reliability. Convenient Local Maintenance: When a module malfunctions (such as a damaged water collection shell 6 or a blocked gas distribution shell 7), only the corresponding module needs to be disassembled for repair or replacement, without disassembling the entire mounting frame, improving maintenance efficiency and reducing maintenance costs. Enhanced Gas-Water Separation: The design of the upper and lower mounting bases 9 makes the aeration system and the product water system more spatially organized, further ensuring the independence of the water collection chamber 602 and the air inlet pipe 601, reducing gas-water mixing interference, improving product water quality, and extending the service life of the membrane fibers. Uniform fluid distribution: The integrated mounting base has smoother internal flow channels, and the gas and water flow are more evenly distributed among the modules, avoiding the problem of reduced processing efficiency caused by excessively fast or slow local flow rates.

[0042] In some embodiments of this utility model, such as Figure 4-5 The water collection shell 6 and the corresponding gas distribution shell 7 at the lower end are integrally formed as an installation part 10. Multiple installation parts 10 are connected side by side, and adjacent water collection shells 6 are interconnected, and adjacent gas distribution shells 7 are interconnected.

[0043] Specifically, such as Figure 4-5The membrane reactor mounting frame achieves integrated and modular design through the integral molding and side-by-side connection of the water collection shell 6 and the gas distribution shell 7. A single water collection shell 6 and its corresponding gas distribution shell 7 are integrally molded using processes such as injection molding, die casting, or welding to form an independent mounting component 10. This mounting component 10 internally integrates a water collection chamber 602 (product water side) and an aeration channel (air inlet side), which are completely isolated to prevent air-water mixing. The water collection shell 6 receives purified water after membrane filtration, collects it through the water collection chamber 602, and transports it to the product water outlet. The gas distribution shell 7 connects the aeration nozzle 71 and the air inlet pipe 601, evenly distributing compressed air to the aeration pipe 5 to provide aeration and flushing for the membrane fibers. Lateral expansion mechanism: Multiple integrally molded mounting components 10 are connected laterally side-by-side through snap-fit, flange, or threaded interfaces to form the overall structure of the membrane reactor. Internal connectivity design: On the product water side: the collection chambers 602 of adjacent collection shells 6 are interconnected via internal channels or interfaces, ensuring that purified water can flow freely between each installation component 10 and is ultimately discharged. On the aeration side: the aeration channels of adjacent gas distribution shells 7 are also interconnected, allowing compressed air to be evenly distributed to all aeration pipes 5, ensuring consistent membrane fiber aeration. Product water flow: After filtration through the membrane bundles, purified water enters the collection chamber 602 of the collection shell 6. Because adjacent collection shells 6 are interconnected, purified water can flow to the main product water outlet through internal channels, achieving centralized discharge and avoiding localized water accumulation or uneven flow rates. Aeration flow: Compressed air enters the gas distribution shell 7 from the aeration nozzle 71, diffuses evenly through the connecting channels of adjacent gas distribution shells 7, and is then transported to the aeration pipes 5 via the air inlet pipe 601, synchronously aerating and rinsing the membrane fiber surface to prevent sludge adhesion.

[0044] In some embodiments of this utility model, such as Figure 4 Multiple replaceable membrane bundles are installed side by side in a transverse direction to form a rectangular array. A support tube 11 is provided on each of the left and right edges of the array, or as shown below. Figure 1 A support tube 11 is provided on each of the left and right edges of the suspended membrane fiber assembly. The support tube 11 is hollow and connected to the water collection shell 6. The support tube 11 is parallel to the replaceable membrane bundle or parallel to the flexible membrane fiber 3 in the suspended membrane fiber assembly.

[0045] Specifically, the array layout and support structure design of the membrane modules (replaceable membrane bundles or suspended membrane fiber modules) in the membrane stack reactor are based on the core principle of achieving multiple objectives—permeate collection, structural support, and membrane module protection—through the hollow connectivity and spatial positioning function of the support tube 11. Multiple replaceable membrane bundles or suspended membrane fiber modules are arranged horizontally (laterally) to form a rectangular array, thus expanding the membrane filtration area. Applicable scenarios:

[0046] like Figure 4 Replaceable membrane bundle (rigid membrane fiber 1): suitable for high-load scenarios, with high array density; such as Figure 1Suspended membrane fiber assembly (flexible membrane fiber 3): requires reserved swing space and has a relatively large array spacing. A support tube 11 is installed on each of the left and right edges of the rectangular array, parallel to and at the same height as the membrane assembly (membrane bundle or membrane fiber), forming a "two-sided clamping" frame structure. The support tube 11 has a hollow cavity inside, with one end connected to the water collection chamber 602 of the water collection shell 6, and the other end extending to the product water outlet, serving as a transmission channel for purified water.

[0047] In some embodiments of this utility model, such as Figure 4 and Figure 5 At least one transverse guardrail frame 12 is connected between the support tubes 11. The guardrail frame 12 is perpendicular to the axis of the replaceable membrane bundle, and its two ends are fixed to the support tubes 11 on the left and right sides respectively. The guardrail frame 12 is provided with several partitions perpendicular to the frame. The partitions are evenly distributed along the arrangement direction of the membrane bundles and are used to divide the replaceable membrane bundles installed side by side into independent units.

[0048] Specifically, such as Figure 4 and Figure 5 The combination design of the guardrail frame 12 and the partitions achieves the lateral limiting and separation structure of the membrane module, realizing the physical separation, positioning and fixation, and impact protection of the replaceable membrane bundles. The guardrail frame 12 is a rigid rod-shaped or plate-shaped structure, perpendicular to the axis of the replaceable membrane bundles (i.e., arranged laterally), and is fixed at both ends to the support tubes 11 on the left and right sides by bolts, buckles, etc., forming a "crossbeam" spanning the membrane bundle array; quantity: at least 1, which can be increased according to the length of the membrane bundle array. The partitions are thin sheet-shaped structures, perpendicular to the guardrail frame 12 (i.e., parallel to the membrane bundle axis), and evenly distributed along the membrane bundle arrangement direction (longitudinal). They are embedded in the slots of the guardrail frame 12 or welded to fix the three-dimensional positioning system: support tube 11 (longitudinal): provides vertical support on the left and right sides of the membrane bundle array; guardrail frame 12 (lateral): connects the support tubes 11 to form a horizontal limiting boundary; partitions (longitudinal): subdivide independent units within the guardrail frame 12 to form a "cross-sectional" grid limiting structure.

[0049] This invention provides two types of modular membrane modules (replaceable membrane bundles and suspended membrane fiber modules) to adapt to the installation requirements of membrane fibers of different materials; at the same time, the independent flow channel design for gas-water separation ensures aeration and water production efficiency.

[0050] The above are merely the principles and preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several other modifications can be made based on the principles of this utility model, and these modifications should also be considered within the scope of protection of this utility model.

Claims

1. A replaceable membrane bundle, characterized in that, The replaceable membrane bundle includes multiple hollow rigid membrane filaments. The two ends of the replaceable membrane bundle are a fixed end and a free end, respectively. The adjacent rigid membrane filaments at the fixed end are hardened by sealing and each rigid membrane filament is hollow inside. The adjacent rigid membrane filaments at the free end are independent of each other and the end face of each rigid membrane filament is sealed.

2. A suspended membrane fiber assembly, characterized in that, It includes multiple flexible membrane filaments, each of which is independent and suspended in a U-shape on a suspension, which is arranged perpendicular to the axis of the flexible membrane filaments.

3. A membrane stack reactor, characterized in that, It includes a mounting frame, an aeration pipe, and several replaceable membrane bundles as described in claim 1 or suspended membrane filament assemblies as described in claim 2. The fixed end of the replaceable membrane bundle is connected to the membrane shell, or the lower end of the flexible membrane filament is connected to the membrane shell. The membrane shell is provided with an aeration pipe, and the membrane shell is detachably connected to the mounting frame.

4. The membrane stack reactor according to claim 3, characterized in that, The mounting frame includes a water collection shell, the upper end of which is detachably connected to the membrane shell. The water collection shell is provided with an air inlet pipe that communicates with the aeration pipe. The water collection shell is also provided with a water collection chamber for holding the purified water filtered by the replaceable membrane bundle. The water collection chamber and the air inlet pipe are independent of each other.

5. The membrane stack reactor according to claim 4, characterized in that, The mounting frame also includes a gas distribution shell connected to the bottom of the water collection shell. The gas distribution shell is provided with an aeration nozzle. The aeration nozzle extends upward to communicate with the air inlet pipe and extends downward to connect with the sewage outlet. The aeration nozzle has a "trumpet mouth" structure.

6. The membrane stack reactor according to claim 5, characterized in that, Multiple water collection shells are arranged side by side and interconnected to form an upper mounting base, and multiple gas distribution shells are arranged side by side and interconnected to form a lower mounting base, with the upper mounting base and the lower mounting base connected together.

7. The membrane stack reactor according to claim 5, characterized in that, The water collection shell and the corresponding gas distribution shell at the lower end are integrally formed as an installation component. Multiple installation components are connected side by side, and adjacent water collection shells are interconnected, as are adjacent gas distribution shells.

8. The membrane stack reactor according to claim 4, characterized in that, Multiple replaceable membrane bundles are installed side by side in a transverse direction to form a rectangular array. A support tube is provided on each of the left and right edges of the array, or a support tube is provided on each of the left and right edges of the suspended membrane fiber assembly. The support tube is hollow and communicates with the water collection shell. The support tube is parallel to the replaceable membrane bundles or parallel to the flexible membrane fiber in the suspended membrane fiber assembly.

9. The membrane stack reactor according to claim 8, characterized in that, At least one transverse guardrail frame is connected between the support tubes. The guardrail frame is perpendicular to the axis of the replaceable membrane bundle, and its two ends are fixed to the support tubes on the left and right sides respectively. The guardrail frame is provided with a number of partitions perpendicular to the frame. The partitions are evenly distributed along the arrangement direction of the membrane bundles and are used to divide the replaceable membrane bundles installed side by side into independent units.

10. The membrane stack reactor according to claim 8, characterized in that, When the suspended membrane fiber assembly is used, the suspension is arranged between the support tubes, and the suspension member is a clip or a collar. The flexible membrane fiber is detachably fixed to the suspension member.

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