A self-vibrating MBR membrane frame

Abstract

This invention provides an automatically vibrating MBR membrane holder, which solves the problems of high energy consumption, complex structure, and uneven vibration in existing MBR membrane holders. It includes an outer frame and multiple inner membrane holders; the top inner wall of the outer frame has multiple slots, with latches movably connected within the slots; the top of each inner membrane holder has a locking block that engages with the latches, and a compression spring abuts against the inner wall of the slot top; symmetrical first limiting protrusions extend from the side walls of the slots, engaging with the bottom of the latches; the bottom inner wall of the outer frame has a U-shaped groove corresponding to the slots, and the bottom of each inner membrane holder has a hemispherical protrusion that slides with the U-shaped groove; symmetrical second limiting protrusions extend from the side walls of the U-shaped groove, engaging with the top of the hemispherical protrusion; each slot and U-shaped groove movably connects to one inner membrane holder. This invention has wide applications in the field of water treatment equipment technology.

Description

Technical Field

[0001] This application relates to the field of water treatment equipment technology, and more specifically, to an MBR membrane frame that can automatically vibrate. Background Technology

[0002] In the field of wastewater treatment, membrane bioreactor (MBR) technology has become the mainstream process due to its advantage of combining efficient membrane separation with the traditional activated sludge process. Its core involves placing the MBR membrane module in an aeration tank. After aerobic aeration and biodegradation, wastewater is pumped out as treated water through solid-liquid separation via a filter membrane. The MBR membrane frame, as the core component that fixes and supports the membrane module, is crucial to the system's operational stability and separation efficiency.

[0003] However, MBR membrane modules are often immersed in wastewater for extended periods, leading to the adsorption of sludge and large organic molecules on the membrane fiber surface. This can obstruct water flow and clog collection pipes, necessitating measures to mitigate membrane fouling. Current MBR membrane frames are typically integral welded structures, complex in design and secured with numerous screws. Maintenance requires disassembling a large number of fasteners, which is time-consuming and labor-intensive. Traditional mechanical vibration relies on complex components such as motors and eccentric wheels, which continuously consume electrical energy, resulting in high costs and energy consumption. Furthermore, existing membrane frames exhibit poor vibration uniformity. While the entire frame moves synchronously during vibration, uneven airflow distribution and structural limitations cause significant differences in vibration amplitude between the membrane modules in the center and at the edges, creating vibration blind spots. This leads to sludge accumulation on some membrane surfaces, resulting in poor membrane fouling mitigation. Utility Model Content

[0004] To address the aforementioned problems, the present invention provides an MBR membrane frame with automatic vibration capability, solving the issues of high energy consumption, complex structure, and uneven vibration in existing MBR membrane frames. It includes an outer frame and multiple inner membrane frames; the top inner wall of the outer frame has multiple slots, with latches movably connected within each slot; the top of each inner membrane frame has a latching block that engages with the latches, and a compression spring abuts against the inner wall of the slot top; symmetrical first limiting protrusions extend from both sides of the slots, engaging with the bottom of the latches; the bottom inner wall of the outer frame has a U-shaped groove corresponding to the slots, and the bottom of each inner membrane frame has a hemispherical protrusion that slidably connects to the U-shaped groove; symmetrical second limiting protrusions extend from both sides of the U-shaped groove, engaging with the top of the hemispherical protrusion; each slot and U-shaped groove movably connects to one inner membrane frame.

[0005] Preferably, the buckle includes a connecting part and a snap-fit ​​part connected sequentially from top to bottom. The snap-fit ​​part is provided with an adjustment cavity that is movably connected to the snap-fit ​​block. Symmetrical third limiting protrusions extend from the bottom of the side walls on both sides of the adjustment cavity and cooperate with the bottom surface of the snap-fit ​​block.

[0006] Preferably, the bottom surfaces of the two third limiting protrusions are provided with symmetrical inclined guide surfaces, and the top of the card block is provided with an inclined surface, which cooperates with the inclined surface of the card block.

[0007] Preferably, the slot is convex in shape, and the inner wall of the slot is symmetrically provided with steps to limit the engagement part. Each step is detachably connected to the first limiting protrusion with a limiting block, and the two limiting blocks abut against the two sides of the engagement part respectively.

[0008] Preferably, the top circumferential surface of the snap-fit ​​part is provided with an inclined surface, which cooperates with the step.

[0009] Preferably, the bottom of the outer frame is provided with an aeration pipe, and the surface of the aeration pipe is provided with a number of aeration holes spaced apart along the length direction.

[0010] Preferably, the surface of the aeration pipe is provided with two rows of staggered aeration holes, with adjacent aeration holes staggered along the circumferential direction.

[0011] Preferably, the inner membrane frame is provided with an MBR membrane assembly.

[0012] The beneficial effects of this invention are: the device has a simple structure, few parts, and low manufacturing cost; it requires no additional motors, vibrators, or other power components, achieving automatic shaking through the movable connection between the inner membrane frame and the outer frame, as well as compression springs, resulting in low energy consumption; each inner membrane frame can shake independently, with better shaking uniformity than an integral membrane frame, avoiding shaking blind spots and improving the speed and effectiveness of mitigating membrane fouling. The inner membrane frames can be independently disassembled and installed, facilitating maintenance; the material of the inner membrane frames can be replaced according to the specific wastewater environment being treated, making it widely applicable. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A magnified view of a section at point B.

[0015] Symbols in the diagram: 1. Outer frame; 2. Inner membrane frame; 3. Slot; 4. Buckle; 41. Connecting part; 42. Snap-fit ​​part; 43. Adjustment chamber; 5. Locking block; 6. Compression spring; 7. First limiting protrusion; 8. U-shaped groove; 9. Hemispherical protrusion; 10. Second limiting protrusion; 11. Third limiting protrusion; 12. Step; 13. Limiting block; 14. Aeration pipe; 15. Aeration hole. Detailed Implementation

[0016] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0017] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0018] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] The present application will now describe an MBR membrane frame that can automatically shake, according to an embodiment of the present application.

[0020] Please see Figures 1 to 3The automatically vibrating MBR membrane frame includes an outer frame 1 and multiple inner membrane frames 2. Specifically, the outer frame 1 is a rectangular frame structure, fixed at the bottom of the MBR tank. The inner membrane frames 2 are used to install MBR membrane modules (not shown in the figure). An upper water collection pipe and a lower water collection pipe (not shown in the figure) are fixed to the top and bottom of the inner membrane frames 2, respectively. The two ends of the MBR membrane modules are sealed to the upper and lower water collection pipes to ensure normal collection of permeate water. Multiple slots 3 are provided on the inner wall of the top of the outer frame 1, the number of slots 3 being the same as the number of inner membrane frames 2, and evenly distributed along the length of the outer frame 1. A buckle 4 is movably connected within the slot 3. A locking block 5, engaging with the buckle 4, is located on the top of the inner membrane frame 2. The buckle 4 and locking block 5 allow the inner membrane frame 2 to be quickly and securely fastened to the outer frame 1. A compression spring 6 abuts against the buckle 4 and the inner wall of the top surface of the slot 3. Symmetrical first limiting protrusions 7 extend from both sides of the slot 3, engaging with the bottom of the buckle 4 to prevent it from detaching from the slot 3 and ensuring the stability of the connection. A U-shaped groove 8, corresponding to the slot 3, is located on the inner wall of the bottom of the outer frame 1. A hemispherical protrusion 9 is located at the bottom of the inner membrane frame 2, slidingly connected to the U-shaped groove 8. Symmetrical second limiting protrusions 10 extend from both sides of the U-shaped groove 8, engaging with the top of the hemispherical protrusion 9. One inner membrane frame 2 is movably connected between each slot 3 and U-shaped groove 8. This device has a simple structure, few parts, and low manufacturing cost; it requires no additional motors, vibrators, or other power components to achieve automatic shaking, resulting in low energy consumption; each inner membrane frame 2 can shake independently, with better shaking uniformity than a single membrane frame, avoiding shaking blind spots and improving the speed and effectiveness of mitigating membrane fouling. The inner membrane frame 2 can be independently disassembled and installed, facilitating maintenance; the material of the inner membrane frame 2 can be replaced according to the specific wastewater environment being treated, making it widely applicable.

[0021] Specifically, during MBR system aeration, compressed air rises from the bottom of the outer frame 1, and the airflow impacts the lower water collection pipe of the inner membrane frame 2 and the MBR membrane assembly, generating an upward thrust. This thrust overcomes the weight of the inner membrane frame 2 and the initial elasticity of the compression spring 6, causing the inner membrane frame 2 to lift upward, and the compression spring 6 to further compress. When the aeration airflow fluctuates, the upward thrust decreases, and the inner membrane frame 2 falls downward under the combined action of its own weight and the spring rebound. During the fall, the hemispherical protrusion 9 slides along the U-shaped groove 8, driving the inner membrane frame 2 to swing back and forth, realizing the automatic shaking function of the inner membrane frame 2's up-and-down shaking and back-and-forth swinging, shaking off the sludge adsorbed on the membrane surface.

[0022] Furthermore, the buckle 4 includes a connecting part 41 and a locking part 42 connected sequentially from top to bottom. The buckle 4 is made of elastic material. The locking part 42 has an adjustment cavity 43 that is movably connected to the locking block 5. The size of the adjustment cavity 43 is slightly larger than that of the locking block 5 to ensure that the locking block 5 can move flexibly and to avoid the inner membrane frame 2 being unable to shake due to excessive locking. Symmetrical third limiting protrusions 11 are provided at the bottom of the side walls on both sides of the adjustment cavity 43. The third limiting protrusions 11 cooperate with the bottom surface of the locking block 5 to prevent the locking block 5 from falling out of the adjustment cavity 43 and to ensure the reliability of the locking between the buckle 4 and the locking block 5. When installing the inner membrane frame 2, align the locking block 5 at the top of the inner membrane frame 2 with the adjustment cavity 43 of the locking part 42, press the inner membrane frame 2 to slightly deform the locking part 42, and the locking block 5 enters the adjustment cavity 43. When the locking block 5 passes the third limiting protrusion 11, the locking part 42 returns to its original position, and the third limiting protrusion 11 restricts the locking block 5 in the adjustment cavity 43, thus completing the locking.

[0023] Furthermore, the bottom surfaces of the two third limiting protrusions 11 are provided with symmetrical inclined guide surfaces, and the top circumferential surface of the locking block 5 is provided with an inclined surface. The inclined guide surfaces cooperate with the inclined surface of the locking block 5, so that the locking block 5 can be smoothly inserted into the adjustment cavity 43, reducing the installation resistance.

[0024] Furthermore, the slot 3 is convex in shape, and the inner wall of the slot 3 is symmetrically provided with steps 12 to limit the engagement part 42. The steps 12 contact the top surface of the engagement part 42, limiting the upward displacement of the engagement part 42. Each step 12 is detachably connected to the first limiting protrusion 7 with a limiting block 13. The two limiting blocks 13 abut against the two sides of the engagement part 42 respectively. The thickness of the limiting block 13 can be adjusted according to the size of the buckle 4 to adapt to buckles of different specifications. Specifically, the limiting block 13 cooperates with the steps 12 on the inner wall of the slot 3 to form a lateral support for the engagement part 42, preventing the engagement part 42 from excessive lateral deformation due to the vibration of the inner membrane frame 2, and ensuring the engagement stability of the buckle 4 and the locking block 5. When disassembling, after removing the limiting block 13, the engagement part 42 rebounds outward under the pressure of the locking block 5, expanding the opening size of the adjustment cavity 43, making it easier for the locking block 5 to be smoothly removed, and realizing the quick disassembly of the inner membrane frame 2.

[0025] Furthermore, the top circumferential surface of the snap-fit ​​part 42 is provided with an inclined surface. The inclined surface of the snap-fit ​​part 42 cooperates with the step 12 to reduce the friction between the buckle 4 and the step 12 when the buckle 4 moves up and down, thereby extending the service life of the buckle 4 and the slot 3.

[0026] Specifically, the bottom of the outer frame 1 is provided with an aeration pipe 14, and the surface of the aeration pipe 14 is provided with a number of aeration holes 15 spaced apart along the length direction. The main aeration pipe sends compressed air into the aeration pipe 14 and sprays it out evenly through the aeration holes 15 to form an upward airflow; when the airflow passes through the sewage, part of the oxygen dissolves to provide microorganisms for degrading organic matter, and the other part of the airflow impacts the inner membrane frame 2, providing power for the shaking of the inner membrane frame 2.

[0027] Furthermore, the surface of the aeration pipe 14 is provided with two rows of staggered aeration holes 15, with adjacent aeration holes 15 offset along the circumferential direction. In this embodiment, adjacent aeration holes 15 are offset by 30°-45° along the circumferential direction. By changing the traditional linear layout of aeration holes 15 to a staggered layout, the direction of airflow is changed, forming a spiral upward airflow, which strengthens the periodic change of airflow and improves the shaking effect of the inner membrane frame 2. At the same time, the two-row hole design increases the total aeration volume, ensuring that the airflow thrust can drive the inner membrane frame 2 to shake.

[0028] The working process of this utility model is as follows: The outer frame 1 is fixed to the bottom of the MBR tank with expansion screws and ensured to be horizontal. Then, the locking block 5 at the top of the inner membrane frame 2 is inserted into the adjusting cavity 43 of the buckle 4 in the locking groove 3 of the outer frame 1, and the hemispherical protrusion 9 at the bottom is aligned with the U-shaped groove 8 of the outer frame 1 and inserted, completing the movable connection between the inner membrane frame 2 and the outer frame 1. At the same time, the aeration pipe 14 at the bottom of the outer frame 1 is connected to the aeration system. After the aeration system is started, compressed air is sprayed out through the aeration pipe 14. The rising airflow impacts the membrane assembly of the inner membrane frame 2, generating an upward thrust and pushing the inner membrane frame 2 upward. When the aeration airflow fluctuates, the inner membrane frame 2 falls back. During the fall, the hemispherical protrusion 9 slides along the U-shaped groove 8, causing the inner membrane frame 2 to swing back and forth synchronously, realizing the automatic shaking function of the inner membrane frame 2's up-and-down shaking and back-and-forth swinging. During the shaking process, the membrane assembly shakes together with the inner membrane frame 2, and the sludge and impurities on the surface fall off and flow back to the bottom of the MBR tank, and are finally discharged through the sludge discharge pipe at the bottom of the tank, thereby mitigating membrane fouling.

[0029] In this invention, the device has a simple structure, few parts, and low manufacturing cost. It requires no additional motors, vibrators, or other power components; the automatic shaking function is achieved through the movable connection between the inner membrane frame 2 and the outer frame 1, and the compression spring 6, resulting in low energy consumption. Each inner membrane frame 2 can shake independently, with better shaking uniformity than a monolithic membrane frame, avoiding shaking blind spots and improving the speed and effectiveness of mitigating membrane fouling. The inner membrane frame 2 can be independently disassembled and installed, facilitating maintenance. The material of the inner membrane frame 2 can be replaced according to the specific wastewater environment being treated, making it widely applicable.

[0030] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An MBR membrane frame capable of automatic shaking, comprising an outer frame and multiple inner membrane frames, characterized in that: The outer frame has multiple slots on its top inner wall, each slot containing a movably connected buckle. The inner membrane frame has a locking block on its top that engages with the buckle. A compression spring abuts against the buckle and the inner wall of the slot's top surface. Symmetrical first limiting protrusions extend from the side walls of each slot, engaging with the bottom of the buckle. The outer frame has a U-shaped groove on its bottom inner wall corresponding to each slot. The inner membrane frame has a hemispherical protrusion on its bottom, slidably connected to the U-shaped groove. Symmetrical second limiting protrusions extend from the side walls of the U-shaped groove, engaging with the top of the hemispherical protrusion. Each slot and U-shaped groove movably connects to one inner membrane frame.

2. The self-shaking MBR membrane frame of claim 1, wherein: The buckle includes a connecting part and a snap-fit ​​part connected sequentially from top to bottom. The snap-fit ​​part is provided with an adjustment cavity that is movably connected to the snap-fit ​​block. Symmetrical third limiting protrusions extend from the bottom of the side walls on both sides of the adjustment cavity. The third limiting protrusions cooperate with the bottom surface of the snap-fit ​​block.

3. The self-shaking MBR membrane frame of claim 2, wherein: The bottom surfaces of the two third limiting protrusions are provided with symmetrical inclined guide surfaces, and the top of the card block is provided with an inclined surface, which cooperates with the inclined surface of the card block.

4. The self-shaking MBR membrane frame of claim 2, wherein: The slot is convex in shape, and the inner wall of the slot is symmetrically provided with steps that limit the engagement part. Each step is detachably connected to the first limiting protrusion with a limiting block, and the two limiting blocks abut against the two sides of the engagement part respectively.

5. The self-shaking MBR membrane frame of claim 4, wherein: The top circumferential surface of the snap-fit ​​part is provided with an inclined surface, which cooperates with the step.

6. The self-shaking MBR membrane frame of claim 1, wherein: The bottom of the outer frame is provided with an aeration pipe, and the surface of the aeration pipe is provided with a number of aeration holes spaced apart along the length direction.

7. The self-shaking MBR membrane frame of claim 6, wherein: The surface of the aeration pipe is provided with two rows of staggered aeration holes, with adjacent aeration holes being staggered along the circumferential direction.

8. An auto-shaking MBR membrane frame according to any one of claims 1-7, characterized in that: The inner membrane frame is equipped with an MBR membrane assembly.

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