Corrugated membrane element, corrugated membrane assembly and flat membrane stack

Abstract

The utility model discloses a corrugated membrane element which comprises a supporting piece and a corrugated membrane, a water collecting cavity and a water outlet hole are formed in the supporting piece, a connecting lug is arranged on the side, close to the water collecting cavity, of the supporting piece, one face of the connecting lug extends outwards to form a first butt joint part, and the other face of the connecting lug is provided with a second butt joint part used for being connected with the first butt joint part in a clamped mode. A water guide hole is formed in the supporting piece in a penetrating manner; the other end of the water outlet hole is communicated with the water guide hole; the corrugated membrane comprises a flat-plate-shaped supporting layer and a corrugated filtering membrane layer, the supporting layer and the filtering membrane layer are stacked and define a plurality of filtering cavities, one end of each filtering cavity is a water production end, and the other end of each filtering cavity is blocked; the corrugated membrane is fixedly connected with the supporting piece, and the water producing end is inserted into the water collecting cavity to communicate the filtering cavity with the water collecting cavity. The utility model further discloses a corrugated membrane assembly comprising the corrugated membrane element and a flat membrane stack comprising the corrugated membrane assembly. The membrane separation device is large in filtering area, high in membrane separation efficiency and convenient and fast to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the technical field of membrane filtration, and particularly relates to a corrugated membrane element, a corrugated membrane assembly and a flat membrane stack. Background Art

[0002] A membrane bioreactor (MBR for short) is a wastewater treatment system that combines membrane separation technology with biological treatment technology, and is widely used in the sewage treatment of urban sewage, industrial wastewater, food processing, chemical industry and other fields. As a key component in the membrane bioreactor, there are mainly two structural forms of the membrane modules selected for the existing membrane bioreactors, flat membranes and hollow fiber membranes.

[0003] Among them, the flat membrane is a membrane with a flat or paper-like shape, and can be used to prepare plate-frame type, folded type and spiral wound membrane elements. After being prepared into a flat membrane element, a frame is needed for support, and they are arranged at intervals and stacked through the frame. However, the existing flat membrane elements are inconvenient to install and replace, and the packing density during filling is significantly lower than that of the hollow fiber membrane, affecting the separation efficiency. Although the existing hollow fiber membrane has a higher packing density than the flat membrane, it is easily entangled by hair during operation, and serious problems such as mud accumulation at the root and filament breakage occur. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a corrugated membrane element, a corrugated membrane assembly and a flat membrane stack, which have a higher packing density and are more convenient to install and replace.

[0005] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] A corrugated membrane element includes a support member and a corrugated membrane. A water collection cavity and a water outlet hole are formed inside the support member, and a connecting ear is arranged on one side close to the water collection cavity. One side of the connecting ear extends outward to form a first docking portion, and the other side is provided with a second docking portion for mutually clamping with the first docking portion. A water guiding hole is penetratingly arranged on the support member; one end of the water outlet hole communicates with the water collection cavity, and the other end communicates with the water guiding hole.

[0007] The corrugated membrane includes a flat support layer and a corrugated filter membrane layer. The support layer and the filter membrane layer are stacked and enclosed to form a plurality of filter cavities. One end of the filter cavity is a water production end, and the other end is sealed; the corrugated membrane is fixedly connected to the support member, the support member unfolds the corrugated membrane, and the water production end is located in the water collection cavity.

[0008] Furthermore, a first counterbore adapted to the outer shape of the second docking portion is formed in the first docking portion. An annular groove is formed on the inner wall surface of the first counterbore or the outer wall surface of the second docking portion, and a sealing ring is installed in the annular groove.

[0009] Furthermore, the water guiding hole penetrates through the first counterbore and the second docking portion, and the axes of the water guiding hole, the first counterbore, and the second docking portion are arranged parallel to each other.

[0010] Furthermore, the support member includes a first support portion and a second support portion. The first support portion and the second support portion are oppositely arranged on both sides of the corrugated film and are respectively connected to the corrugated film. Connection ears are provided on both the first support portion and the second support portion.

[0011] Furthermore, a plurality of docking bosses extend from the support member, and a plurality of second counterbores are formed. The docking bosses are arranged on the same side as the first docking portion and have the same extending direction. The second counterbores are arranged on the same side as the second docking portion and can be engaged by the docking bosses.

[0012] Furthermore, a connection hole is formed in the support member, and the connection hole penetrates through the docking boss and the second counterbore.

[0013] Furthermore, concave portions and convex portions are alternately arranged on the surface of the filter membrane layer. The cross-sectional shapes of the concave portions and the convex portions are U-shaped, V-shaped, or arc-shaped; the filter membrane layer is made of PVDF material, and the support layer is made of PET material.

[0014] A corrugated film assembly includes a fixing frame and a plurality of the above-mentioned corrugated film elements. The corrugated film elements are stacked in sequence and arranged at parallel intervals. Any two adjacent corrugated film elements are mutually clamped through the first docking portion and the second docking portion, and the water guiding holes on each corrugated film element are sequentially communicated to form a water guiding channel. The fixing frame is used to fix the corrugated film elements together.

[0015] Furthermore, the fixing frame includes two fixing plates and a plurality of fixing rods. The corrugated film elements are arranged between the two fixing plates. The fixing rods sequentially pass through the fixing plates and the corrugated film elements, and the two ends are respectively locked and fixed to the fixing plates through fastening bolts.

[0016] A flat membrane stack includes a plurality of the above-mentioned corrugated film assemblies. The corrugated film assemblies are arranged in a matrix, and the water guiding channels are mutually communicated.

[0017] The utility model has the following beneficial effects:

[0018] 1. The present utility model provides a corrugated membrane element. The corrugated membrane it carries has a flat support layer and a corrugated filter membrane layer, such that the packing area of the corrugated membrane element under the same projected area is significantly larger than that of traditional flat membrane elements, and the packing density of the module is relatively high. In addition, a first docking part and a second docking part are respectively arranged on both sides of the corrugated membrane element. Through the mutual clamping of the first docking part and the second docking part, the interval fixation between corrugated membrane elements can be directly achieved, improving the convenience of installation and disassembly of the corrugated membrane elements.

[0019] 2. The present utility model provides a corrugated membrane module and a flat membrane stack, which have a stable and reliable structure, are convenient for installation and disassembly, and have a relatively large filtration area, effectively improving the water treatment flux and membrane separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram (I) of the structure of the corrugated membrane element of the present utility model.

[0021] Figure 2 It is Figure 1 A partial enlarged schematic diagram of the structure of part I therein.

[0022] Figure 3 It is Figure 1 A partial enlarged schematic diagram of the structure of part II therein.

[0023] Figure 4 It is a schematic diagram (II) of the structure of the corrugated membrane element of the present utility model.

[0024] Figure 5 It is Figure 4 A partial enlarged schematic diagram of the structure of part III therein.

[0025] Figure 6 It is Figure 4 A partial enlarged schematic diagram of the structure of part IV therein.

[0026] Figure 7 It is a front view schematic diagram of the structure of the corrugated membrane element of the present utility model.

[0027] Figure 8 It is Figure 7 A partial enlarged schematic diagram of the structure of part V therein.

[0028] Figure 9 It is Figure 7 A sectional view taken along line A - A therein.

[0029] Figure 10 It is Figure 7 A sectional view taken along line B - B therein.

[0030] Figure 11 It is a schematic diagram (III) of the structure of the corrugated membrane element of the present utility model.

[0031] Figure 12 This is a schematic half-sectional view of the corrugated membrane element of the present utility model.

[0032] Figure 13 This is a schematic front view of the corrugated membrane assembly of the present utility model.

[0033] Figure 14 This is a schematic top view of the corrugated membrane assembly of the present utility model.

[0034] Figure 15 This is a schematic view of the flat membrane stack structure of the present utility model.

[0035] Description of main component symbols: 1. Corrugated membrane element; 2. Support member; 3. Water collection cavity; 4. Water outlet hole; 5. Connecting ear; 6. First docking part; 7. Second docking part; 8. Water guiding hole; 9. Corrugated membrane; 10. Support layer; 11. Filter membrane layer; 12. Filter cavity; 13. Water production end; 14. First sunken hole; 15. Annular groove; 16. First support part; 17. Second support part; 18. Docking boss; 19. Second sunken hole; 20. Connecting hole; 21. Concave part; 22. Convex part; 23. Corrugated membrane assembly; 24. Fixed frame; 25. Water guiding channel; 26. Fixed plate; 27. Fixed rod; 28. Fastening bolt; 29. Water delivery pipe. Specific embodiments

[0036] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments.

[0037] Embodiment 1: As Figure 1-12 shown, the present utility model discloses a corrugated membrane element 1, which includes a support member 2 and a corrugated membrane 9. A water collection cavity 3 and a water outlet hole 4 are provided inside the support member 2, and a connecting ear 5 is provided on one side close to the water collection cavity 3. One side of the connecting ear 5 extends outward to form a first docking part 6, and the other side is provided with a second docking part 7 for mutually clamping with the first docking part 6. A water guiding hole 8 is provided through the support member 2; one end of the water outlet hole 4 communicates with the water collection cavity 3, and the other end communicates with the water guiding hole 8. The corrugated membrane 9 includes a flat support layer 10 and a corrugated filter membrane layer 11. The support layer 10 and the filter membrane layer 11 are stacked and enclosed to form a plurality of parallel filter cavities 12. One end of the filter cavity 12 is used as the water production end 13, and the other end is blocked.

[0038] In the corrugated membrane 9 for filtration, the support layer 10 is preferably made of PET material, and the filtration membrane layer 11 is preferably made of PVDF material, and concave portions 21 and convex portions 22 are formed alternately on the surface. The cross-sectional shapes of the concave portions 21 and the convex portions 22 can be U-shaped, V-shaped or arc-shaped. Thanks to the special corrugated structure of the filtration membrane layer 11, this corrugated membrane element 1 has a larger filtration area than the traditional flat membrane element, with a larger water treatment flux and a higher membrane separation efficiency. Under the same projected area, the packing area of this corrugated membrane element 1 during packing is obviously larger than that of the traditional flat membrane element, and the packing density of the module is higher. Moreover, when using this corrugated membrane element 1, a turbulent flow can be formed on the surface of the corrugated membrane 9, with strong anti-pollution ability, and it can be backwashed, with strong self-repair ability, no accumulation of hair fibers, and easy maintenance.

[0039] The corrugated membrane 9 is fixedly connected to the support member 2 and is unfolded through the support member 2. The corrugated membrane 9 is partially inserted into the water collection chamber 3, so that the water production ends 13 of the respective filtration chambers 12 are all located in the water collection chamber 3, and the filtration chambers 12 are hermetically communicated with the water collection chamber 3. When used for treating sewage, the corrugated membrane 9 fixed in the support member 2 can filter the sewage, and the purified water produced by filtering through the filtration membrane layer 11 can be concentrated in the water collection chamber 3 through the respective filtration chambers 12 and is exported through the water guiding holes 8.

[0040] The first docking portion 6 and the second docking portion 7 provided on the support member 2 are mutually matching in shape, so that when this corrugated membrane element 1 is installed, it can be mutually clamped and fixed with another corrugated membrane element 1 through the first docking portion 6 and the second docking portion 7, and the installation is convenient. Moreover, since the first docking portion 6 and the second docking portion 7 have a certain height, there is a certain distance between the corrugated membrane elements 1 after being clamped and fixed.

[0041] Specifically, a first counterbore 14 adapted to the outer shape of the second docking portion 7 is provided on the first docking portion 6. During installation, the second docking portion 7 can be directly inserted into the first counterbore 14 for clamping and fixing. Further, an annular groove 15 is provided on the inner wall surface of the first docking portion 6 or the outer wall surface of the second docking portion 7, and a sealing ring (not shown) is installed in the annular groove 15 to ensure the stable connection between the first docking portion 6 and the second docking portion 7. As a preference, the water guiding holes 8 for exporting purified water can be provided at the first docking portion 6 and the second docking portion 7 and penetrate through the first counterbore 14 and the second docking portion 7. The axes of the water guiding holes 8, the first counterbore 14 and the second docking portion 7 are arranged parallel to each other. After the first docking portion 6 and the second docking portion 7 are mutually clamped, the water guiding holes 8 thereon can be mutually communicated, and under the action of the sealing ring, it is not easy for water to seep between the mutually communicated water guiding holes 8.

[0042] Similar to the first docking portion 6 and the second docking portion 7, a number of docking bosses 18 are also formed by extending on the support member 2, and a number of second counterbores 19 are provided. The docking bosses 18 are arranged on the same side as the first docking portion 6 and have the same extending direction. The second counterbores 19 are arranged on the same side as the second docking portion 7 and can be engaged by the docking bosses 18. The docking bosses 18 and the second counterbores 19 arranged along the outer edge of the support member 2 can assist in docking the corrugated membrane elements 1, making the alignment between the corrugated membrane elements 1 more accurate and the connection more stable. Preferably, the extending height of the docking bosses 18 is the same as that of the first docking portion 6 to arrange the corrugated membrane elements 1 in parallel. A connection hole 20 is also provided on the support member 2. The connection hole 20 penetrates through the docking bosses 18 and the second counterbores 19 and can be used to fix the corrugated membrane elements 1 after the corrugated membrane elements 1 are engaged with each other.

[0043] In this embodiment, the support member 2 is designed in a split type and includes two parts, a first support portion 16 and a second support portion 17. The first support portion 16 and the second support portion 17 are oppositely arranged on both sides of the corrugated membrane 9 and are respectively connected to the corrugated membrane 9. Connection ears 5 are provided on both the first support portion 16 and the second support portion 17, which enables both the first support portion 16 and the second support portion 17 to be plugged and fixed to another corrugated membrane element 1. The docking bosses 18 and the second counterbores 19 are arranged on both sides of the connection ears 5 on the first support portion 16 and the second support portion 17. The above-mentioned water collecting cavity 3, water outlet hole 4 and water guiding hole 8 are correspondingly arranged on the first support portion 16 or the second support portion 17, and the water guiding hole 8 is preferably provided at the connection ear 5.

[0044] Embodiment 2: On the basis of the above Embodiment 1, as Figure 13 , 14 shown, the present utility model also discloses a corrugated membrane assembly 23, which includes a number of the above-mentioned corrugated membrane elements 1 and a fixing frame 24. Each corrugated membrane element 1 is sequentially stacked and arranged at parallel intervals, and any two adjacent corrugated membrane elements 1 are engaged with each other through the first docking portion 6 and the second docking portion 7. When engaged, the second docking portion 7 is directly inserted into the first counterbore 14. While firmly connecting the corrugated membrane elements 1, it can ensure their spaced arrangement. After engagement, the water guiding holes 8 on each corrugated membrane element 1 are sequentially communicated to form a water guiding channel 25, which can centrally export the purified water produced on each corrugated membrane element 1.

[0045] The fixing frame 24 is used to fix the corrugated membrane elements 1 together after they are snap-connected to each other. Specifically, the fixing frame 24 includes two fixing plates 26 arranged parallel to the corrugated membrane 9 group elements, and several fixing rods 27 arranged along the arrangement direction of the corrugated membrane elements 1. During installation, the corrugated membrane elements 1 are arranged between the two fixing plates 26. The fixing rods 27 sequentially pass through the fixing plates 26 and the connection holes 20 on each corrugated membrane element 1, and the two ends are respectively locked and fixed to the fixing plates 26 through fastening bolts 28, so that each corrugated membrane element 1 can be fixed together.

[0046] Embodiment 3: On the basis of the above Embodiment 2, as Figure 15 shown, the present utility model also discloses a flat membrane stack, which adopts a modular design and includes a plurality of the above-mentioned corrugated membrane assemblies 23. The arrangement mode of each corrugated membrane assembly 23 is adjusted according to the use requirements. After the arrangement, it can be fixed by bolts or corresponding connecting plates, etc., and the assembly and disassembly are relatively convenient. Preferably, after each corrugated membrane assembly 23 is arranged in a matrix. After being fixed, the water guiding channels 25 on each corrugated membrane assembly 23 communicate with each other and are connected to a water delivery pipe 29 for water guiding.

[0047] In summary, the corrugated membrane elements 1, corrugated membrane assemblies 23 and flat membrane stack provided by the present utility model have various structural forms, and all have many advantages such as convenient installation and disassembly, large flow rate, strong filtering ability, strong anti-pollution ability, easy maintenance, etc., and are suitable for popularization and use.

[0048] Although the present utility model is specifically shown and introduced in combination with the preferred implementation schemes, those skilled in the art should understand that without departing from the spirit and scope of the present utility model defined by the appended claims, various changes in form and details made to the present utility model all fall within the protection scope of the present utility model.

Claims

1. A corrugated membrane element, characterized in that, Comprising: A support member, within which a water collection cavity and a water outlet hole are provided. A connecting ear is arranged on one side close to the water collection cavity. One surface of the connecting ear extends outward to form a first docking portion, and the other surface is provided with a second docking portion for mutually clamping with the first docking portion. A water guiding hole is penetratingly arranged on the support member; one end of the water outlet hole communicates with the water collection cavity, and the other end communicates with the water guiding hole; A corrugated membrane, which includes a flat support layer and a corrugated filter membrane layer. The support layer and the filter membrane layer are stacked and enclose to form a plurality of filter cavities. One end of each filter cavity is a water production end, and the other end is sealed; the corrugated membrane is fixedly connected to the support member, the support member unfolds the corrugated membrane, and the water production end is located within the water collection cavity.

2. A corrugated membrane element according to claim 1, wherein: A first counterbore adapted to the outer shape of the second docking portion is provided on the first docking portion. An annular groove is provided on the inner wall surface of the first counterbore or the outer wall surface of the second docking portion, and a sealing ring is installed in the annular groove.

3. A corrugated membrane element according to claim 2, wherein: The water guiding hole penetrates the first counterbore and the second docking portion, and the axes of the water guiding hole, the first counterbore and the second docking portion are arranged parallel to each other.

4. A corrugated membrane element according to claim 1, wherein: The support member includes a first support portion and a second support portion, which are oppositely arranged on both sides of the corrugated membrane and are respectively connected to the corrugated membrane. Connecting ears are provided on both the first support portion and the second support portion.

5. A corrugated membrane element according to claim 1, wherein: A plurality of docking bosses extend from the support member, and a plurality of second counterbores are provided. The docking bosses are arranged on the same side as the first docking portion and have the same extending direction. The second counterbores are arranged on the same side as the second docking portion and can be engaged by the docking bosses.

6. A corrugated membrane element according to claim 5, wherein: A connecting hole is provided on the support member, and the connecting hole penetrates the docking boss and the second counterbore.

7. A corrugated membrane element according to claim 1, wherein: Concave portions and convex portions are alternately formed on the surface of the filter membrane layer, and the cross-sectional shapes of the concave portions and the convex portions are U-shaped or V-shaped or arc-shaped; the filter membrane layer is made of PVDF material, and the support layer is made of PET material.

8. A corrugated membrane assembly, wherein: It includes a fixing frame and a plurality of corrugated membrane elements according to any one of claims 1-7. The corrugated membrane elements are stacked in sequence and arranged at parallel intervals. Any two adjacent corrugated membrane elements are mutually clamped through the first docking portion and the second docking portion, and the water guiding holes on each corrugated membrane element are sequentially communicated to form a water guiding channel. The fixing frame is used to fix the corrugated membrane elements together.

9. A corrugated membrane assembly according to claim 8, wherein: The fixing frame includes two fixing plates and a plurality of fixing rods. The corrugated membrane element is arranged between the two fixing plates. The fixing rods sequentially pass through the fixing plates and the corrugated membrane element, and the two ends are respectively locked and fixed to the fixing plates through fastening bolts.

10. A flat membrane stack, characterized in that: It includes a plurality of corrugated membrane components as described in claim 8 or 9. The corrugated membranes are arranged in a matrix, and the water conduction channels are interconnected.

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