Flat sheet membrane filtering device

Abstract

The invention discloses a flat sheet membrane filtering device. A containing cavity is formed in a membrane shell; the membrane filtration assembly is arranged in the accommodating cavity, the membrane filtration assembly comprises a plurality of filtration elements consisting of membranes and flow guide discs, and the membranes are mounted between every two adjacent flow guide discs; the central rod penetrates through the diaphragm and the flow guide disc; the connecting assembly is arranged in the accommodating cavity and is used for connecting two adjacent membrane filtration assemblies; the quick-release end cover assemblies are arranged at the two ends of the membrane shell and are used for sealing and fastening the membrane filtration assembly; two ends of the membrane shell are respectively provided with a first water inlet and an Nth water outlet, the first water inlet is provided with a first water outlet, and the Nth water outlet is provided with an Nth water inlet; and an nth water inlet and an nth water outlet are respectively formed in two ends of each membrane filtering component in the middle section of the membrane shell. The problems that in the prior art, the structure is complex, maintenance is difficult, water flow distribution is uneven, the filtering efficiency is low, and energy consumption and operation cost are high are solved.

Description

Technical Field

[0001] The invention relates to a flat membrane filtering device, belonging to the technical field of flat membranes. Background Art

[0002] Flat membrane module is an important membrane separation technology equipment, which plays a key role in many fields, especially in water treatment. The working principle of flat membrane module is based on membrane separation technology. During operation, raw water is introduced into the membrane module under a certain pressure, and water molecules pass through the membrane pores under pressure, while the concentrate is retained on the membrane surface or in the membrane pores, thereby achieving purification or separation of raw water.

[0003] At present, traditional flat membrane components have many disadvantages, such as complex structure, numerous parts, cumbersome installation, high cost, and difficult maintenance. Each membrane element requires an independent pressure vessel to accommodate parts such as diaphragms and guide plates. These pressure vessels are usually made of high-strength materials to withstand operating pressure and ensure structural integrity. In addition to the pressure vessel, each membrane assembly also needs to be equipped with multiple parts such as upper and lower end covers, flanges, fastening nuts, auxiliary tie rods, etc. The large number and variety of these parts not only increase the difficulty of assembly, but also increase the complexity of maintenance. At the same time, each part needs to be precisely processed and strictly inspected, which further pushes up the manufacturing cost. In order to meet the requirements of high pressure and corrosion resistance, parts such as pressure vessels and end covers are usually made of stainless steel or other special alloy materials. These materials are expensive and difficult to process, which further increases the manufacturing cost.

[0004] Since traditional membrane components have many parts and are prone to damage and clogging, they need to be inspected and replaced regularly. The pressure vessel, membrane core, end cap, tie rod and other parts of each membrane component need to be inspected and maintained separately, which increases the complexity and cost of maintenance. Since each membrane component requires an independent pressure vessel and corresponding end caps, tie rods and other parts, the entire membrane treatment system will occupy a relatively large area. This is a considerable challenge for places with limited space. Traditional membrane components also need to consume a lot of energy during operation to drive water pumps, fans and other equipment and to maintain the pressure of the pressure vessel. In addition, due to the frequent cleaning and maintenance, additional energy consumption will also be increased. These factors have led to the high energy consumption of traditional membrane components. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a flat membrane filtration device to solve the problems of complex structure, difficult maintenance, uneven water flow distribution, low filtration efficiency, high energy consumption and high operating costs in the traditional technology.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: a flat membrane filtration device, comprising:

[0007] A membrane shell, wherein a containing cavity is formed inside the membrane shell;

[0008] A plurality of membrane filtration components, wherein the membrane filtration components are arranged in the accommodating cavity, and the membrane filtration components include a plurality of filter elements consisting of membranes and guide plates, and the membranes are installed between two adjacent guide plates;

[0009] A center rod, the center rod passing through the diaphragm and the guide plate;

[0010] A plurality of connection components, wherein the connection components are arranged in the accommodating cavity and are used to connect two adjacent membrane filtration components;

[0011] A quick-release end cap assembly, which is disposed at both ends of the membrane shell and is used to seal and fasten the membrane filtration assembly;

[0012] The two ends of the membrane shell are respectively provided with a first water inlet and an Nth water outlet, the first water inlet is configured with a first water outlet, and the Nth water outlet is configured with an Nth water inlet; the middle section of the membrane shell is respectively provided with an nth water inlet and an nth water outlet at the two ends of each membrane filtration assembly;

[0013] The adjacent n+1th water inlet and nth water outlet, or the adjacent n-1th water outlet and nth water inlet are separated by the connecting component, 1<n-1<n<n+1<N, n, N are all positive integers.

[0014] As a preferred solution of the flat membrane filtration device, the connecting assembly includes:

[0015] A partition, the partition is located at the longitudinal center line of the connecting assembly, and the partition is used to separate the water inlet and outlet of two adjacent membrane filtration assemblies;

[0016] A first support member and a second support member, wherein the first support member and the second support member are located on both sides of the partition member, and the first support member and the second support member are connected to the partition member as a whole;

[0017] A connecting pipe, the connecting pipe passes through the first support member, the partition member and the second support member, the connecting pipe is arranged at the center position of the first support member, the partition member and the second support member, and the connecting pipe connects the center rods of two adjacent membrane filtration components.

[0018] As a preferred solution of the flat membrane filtration device, the partition member is a flat disc-shaped structure with a central hole; the first support member and the second support member are both bowl-shaped structures with a hollow interior.

[0019] As a preferred solution of the flat membrane filtration device, the ends of the first support member and / or the second support member are provided with reinforcing ribs;

[0020] A plurality of supporting ribs arranged along the circumferential direction are arranged on the outer peripheral surface of the first supporting member and / or the second supporting member.

[0021] As a preferred solution of the flat membrane filtration device, water holes are provided on the outer circumferential surfaces of the first support member and the second support member; and the water holes are formed between the support ribs.

[0022] As a preferred solution of the flat membrane filtration device, the quick-detachable end cap assembly comprises:

[0023] An integrated thrust component, the integrated thrust component comprises a thrust portion, a reinforcement portion and a connecting portion; the thrust portion is an inwardly concave bowl-shaped structure; the reinforcement portion is a trumpet-shaped structure, the reinforcement portion is axially spaced with annular reinforcement ribs, and the outer circumferential surface of the reinforcement portion is provided with a plurality of through holes for water inlet and outlet; the connecting portion is located at the center hole of the integrated thrust component, the connecting portion is provided with a first end portion and a second end portion, and the connecting portion is connected to an external pipeline through the first end portion for discharging produced water.

[0024] As a preferred solution of the flat membrane filtration device, the quick-detachable end cap assembly further includes:

[0025] A pressure-bearing plate, wherein the pressure-bearing plate is a bowl-shaped structure matching the thrust portion;

[0026] An adapter, the adapter connecting an adjacent membrane filtration assembly and the integrated thrust component, the adapter being arranged inside the reinforcement portion, the adapter being located on the central axis of the flat membrane filtration device, one end of the adapter being connected to the second end of the connection portion, and the other end of the adapter being connected to an adjacent membrane filtration assembly;

[0027] The retaining ring is formed by three retaining rings, and the three retaining rings form an annular groove inside. An elastic locking ring is arranged in the groove, and the elastic locking ring is used to lock the position between the retaining ring and the membrane shell.

[0028] As a preferred solution of the flat membrane filtration device, the membrane filtration assembly further includes a universal end plate, and the universal end plate includes:

[0029] An end plate body, wherein the end plate body is a planar disc-shaped structure with a central hole;

[0030] The tangential flow reinforcement ribs include radial reinforcement ribs and circumferential reinforcement ribs; the circumferential reinforcement ribs are annular structures circumferentially arranged on the end plate body, and the circumferential reinforcement ribs are used to guide the direction of the incoming water flow; the radial reinforcement ribs are arc structures distributed radially from the center hole to the circumference, and the radial reinforcement ribs are used to guide the direction of the incoming water flow.

[0031] As a preferred solution of the flat membrane filtration device, the universal end plate is provided with an upper end interface and a lower end interface;

[0032] The upper end interface of the universal end plate located at the upper part of the membrane filtration assembly is connected to the central rod through a fastening nut, and the lower end interface of the universal end plate located at the upper part of the membrane filtration assembly is connected to the adjacent guide plate;

[0033] The upper end interface of the universal end plate at the lower part of the membrane filtration assembly is connected to the adjacent guide plate, and the lower end interface of the universal end plate at the lower part of the membrane filtration assembly is connected to the center rod through a fastening nut.

[0034] As a preferred solution of the flat membrane filtration device, the central rod is a hollow structure, and a plurality of water-permeable holes are distributed on the central rod. The water-permeable holes are used to collect the produced water after being filtered by the guide plate and the membrane.

[0035] The beneficial effects of the present invention are as follows: the types and quantities of components are greatly reduced, the installation process is simplified, and the installation efficiency is improved; material consumption and production costs are reduced, and the design of the quick-release end cover assembly also simplifies the maintenance process and reduces maintenance costs; by introducing a parallel inlet and outlet design, parallel and uniform flow of water in the membrane shell body is achieved, ensuring that each membrane combination element can receive an equal amount of water flow and pressure, thereby improving filtration efficiency and stability; efficient space utilization is achieved and the floor space occupied is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0037] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0038] Figure 1 It is a schematic overall cross-sectional view of a flat membrane filtration device provided in an embodiment of the present invention;

[0039] Figure 2 It is a schematic diagram of the combination of the intermediate connection component and the membrane shell body of the flat membrane filtration device provided in an embodiment of the present invention;

[0040] Figure 3 It is a cross-sectional schematic diagram of an intermediate connection assembly of a flat membrane filtration device provided in an embodiment of the present invention;

[0041] Figure 4 It is a three-dimensional partial cross-sectional schematic diagram of an intermediate connection assembly of a flat membrane filtration device provided in an embodiment of the present invention;

[0042] Figure 5 It is a schematic diagram of the combination of a quick-detachable end cover assembly and a membrane shell body of a flat membrane filtration device provided in an embodiment of the present invention;

[0043] Figure 6 A schematic cross-sectional view of a quick-detachable end cap assembly of a flat membrane filtration device provided in an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of an exploded view of a quick-detachable end cap assembly of a flat membrane filtration device provided in an embodiment of the present invention;

[0045] Figure 8 It is a schematic diagram of the decomposition of the membrane assembly element of the flat membrane filtration device provided in an embodiment of the present invention;

[0046] Fig. 9 A schematic diagram of a universal end plate of a flat membrane filtration device provided in an embodiment of the present invention;

[0047] Fig.10 This is a schematic diagram of water flow in the flat membrane filtration device provided in an embodiment of the present invention.

[0048] In the figure, 1. membrane shell; 2. accommodating chamber; 3. membrane filtration assembly; 4. diaphragm; 5. guide plate; 6. center rod; 7. connecting assembly; 8. quick-release end cover assembly; 9. partition member; 10. first support member; 11. second support member; 12. connecting pipe; 13. reinforcing ribs; 14. supporting ribs; 15. water holes; 16. integrated thrust component; 17. thrust part; 18. reinforcing part; 19. connecting part; 20. pressure plate; 21. adapter; 22. retaining ring; 23. retaining ring; 24. groove; 25. elastic locking ring; 26. universal end plate; 27. end plate body; 28. cutting flow reinforcement ribs; 29. ​​radial reinforcement ribs; 30. circumferential reinforcement ribs; 31. upper end interface; 32. lower end interface; 33. water permeable hole. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0051] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The embodiment of the present invention provides a flat membrane filtration device, comprising:

[0052] A membrane shell 1, wherein a receiving chamber 2 is formed inside the membrane shell 1;

[0053] A plurality of membrane filtration components 3, wherein the membrane filtration components 3 are arranged in the accommodating chamber 2, and the membrane filtration components 3 include a plurality of filter elements composed of membrane sheets 4 and guide plates 5, wherein the membrane sheets 4 are installed between two adjacent guide plates 5;

[0054] A central rod 6, wherein the central rod 6 passes through the diaphragm 4 and the guide plate 5;

[0055] A plurality of connecting components 7, wherein the connecting components 7 are arranged in the accommodating chamber 2, and the connecting components 7 are used to connect two adjacent membrane filtration components 3;

[0056] A quick-release end cap assembly 8, which is disposed at both ends of the membrane housing 1 and is used to seal and fasten the membrane filtration assembly 3;

[0057] The two ends of the membrane shell 1 are respectively provided with a first water inlet and an Nth water outlet, the first water inlet is configured with a first water outlet, and the Nth water outlet is configured with an Nth water inlet; the middle section of the membrane shell 1 is respectively provided with an nth water inlet and an nth water outlet at the two ends of each of the membrane filtration components 3;

[0058] The adjacent n+1th water inlet and nth water outlet, or the adjacent n-1th water outlet and nth water inlet are separated by the connecting component 7, 1<n-1<n<n+1<N, n, N are all positive integers.

[0059] See also Figure 2 , Figure 3 and Figure 4 In this embodiment, the connection component 7 includes:

[0060] A partition 9, the partition 9 is located at the longitudinal center line of the connecting assembly 7, and the partition 9 is used to separate the water inlet and outlet of two adjacent membrane filtration assemblies 3;

[0061] A first support member 10 and a second support member 11, wherein the first support member 10 and the second support member 11 are located on both sides of the partition member 9, and the first support member 10 and the second support member 11 are connected to the partition member 9 as a whole;

[0062] A connecting pipe 12 passes through the first support member 10, the partition member 9 and the second support member 11. The connecting pipe 12 is arranged at the center position of the first support member 10, the partition member 9 and the second support member 11. The connecting pipe 12 connects the center rods 6 of two adjacent membrane filtration components 3.

[0063] Specifically, the connection component 7 plays the role of connection, partition and water flow management. The partition 9 is located at the longitudinal center line of the connection component 7. The partition 9 effectively separates the water inlet and outlet of two adjacent membrane filter components 3, preventing the liquid from flowing chaotically between the two membrane filter components 3, and ensuring that each membrane filter component 3 can be filtered according to the predetermined process. Among them, the first support member 10 and the second support member 11 are respectively located on both sides of the partition member 9, and are connected to the partition member 9 as a whole, providing structural support for the entire connection component 7, and enhancing the stability and strength of the connection component 7. The connecting pipe 12 runs through the first support member 10, the partition member 9 and the second support member 11, and is located in the center. The connecting pipe 12 plays the role of the central rod 6 connecting the two adjacent membrane filter components 3, so that the adjacent membrane filter components 3 can be tightly connected in structure, and it also helps to maintain the integrity and stability of the entire filtration device.

[0064] In a possible embodiment, a first connecting tube sealing groove is formed at one end of the connecting tube 12, and a second connecting tube sealing groove is formed at the other end of the connecting tube body; a connecting piece sealing groove is formed at the middle edge of the partition piece 9; a first sealing ring is provided inside the first connecting tube sealing groove, a second sealing ring is provided inside the second connecting tube sealing groove, and a bidirectional sealing ring is provided inside the connecting piece sealing groove.

[0065] Specifically, the first sealing ring and the second sealing ring are respectively arranged in the first connecting pipe sealing groove and the second connecting pipe sealing groove at both ends of the connecting pipe 12. When the connecting pipe is connected to the central rod of the membrane filtration assembly, the first sealing ring and the second sealing ring are squeezed to fill the gap at the connection part to prevent the fluid from leaking from both ends of the connecting pipe. The bidirectional sealing ring in the connecting piece sealing groove at the middle edge of the partition piece 9 plays a sealing role at the contact part between the partition piece and the adjacent membrane filtration assembly to prevent the fluid from leaking at the partition.

[0066] In a possible embodiment, the partition member 9 is a planar disc-shaped structure with a central hole; the first support member 10 and the second support member 11 are both hollow bowl-shaped structures. Reinforcement ribs 13 are provided at the ends of the first support member 10 and / or the second support member 11; a plurality of support ribs 14 arranged along the circumferential direction are provided on the outer circumference of the first support member 10 and / or the second support member 11. Water holes 15 are provided on the outer circumference of the first support member 10 and the second support member 11.

[0067] Specifically, the partition 9 is a planar disc-shaped structure with a central hole, the central hole of which is used to allow the connecting pipe 12 to pass through. The shape of the planar disc can well separate the water inlet and outlet of adjacent membrane filtration components 3 in the longitudinal direction, realize the separation of liquid flow, and ensure that each membrane filtration component 3 works independently. The first support member 10 and the second support member 11 are both hollow bowl-shaped structures. This shape increases the strength and stability of the structure and can withstand a certain pressure and impact force.

[0068] At the same time, the reinforcing ribs 13 arranged at the ends of the first support member 10 and / or the second support member 11 further enhance the strength of the ends, prevent deformation or damage during use, and improve the durability of the entire connection assembly 7. The support ribs 14 arranged circumferentially on the outer peripheral surface of the first support member 10 and / or the second support member 11 can increase the contact area with the inner wall of the accommodating chamber 2, improve the stability of the support, and reduce shaking and displacement. At the same time, the design of the support ribs can also significantly disturb the water flow and increase the turbulent effect, thereby effectively preventing the occurrence of fouling inside the membrane shell 1. Turbulence helps to flush away pollutants attached to the membrane surface and keep the membrane elements clean and running efficiently. The water holes 15 arranged on the outer peripheral surface of the first support member 10 and / or the second support member 11 allow the liquid to pass smoothly while maintaining a certain flow rate and pressure control, which helps to optimize the liquid flow distribution during the filtration process.

[0069] See also Figure 5 , Figure 6 and Figure 7 In this embodiment, the quick-release end cover assembly 8 includes:

[0070] The integrated thrust component 16 includes a thrust portion 17, a reinforcement portion 18 and a connection portion 19; the thrust portion 17 is an inwardly concave bowl-shaped structure; the reinforcement portion 18 is a trumpet-shaped structure, annular reinforcement ribs are provided at axial intervals of the reinforcement portion 18, and a plurality of through holes for water inlet and outlet are provided on the outer peripheral surface of the reinforcement portion 18; the connection portion 19 is located at the center hole of the integrated thrust component 16, and the connection portion 19 is provided with a first end and a second end, and the connection portion 19 is connected to an external pipeline through the first end for water discharge.

[0071] Specifically, the thrust portion 17 is a concave bowl-shaped structure, which can match the structure inside the membrane shell 1, play a role in thrust and positioning, and prevent the membrane filtration assembly 3 from excessive displacement during operation. The trumpet-shaped structure of the reinforcement portion 18 can increase the strength and stability of the component. The annular reinforcement ribs arranged at intervals in the axial direction further strengthen the structure of the reinforcement portion 18, so that it can withstand greater pressure and external force, and is not easy to deform or damage. At the same time, the design of the reinforcement ribs breaks the original laminar state of the water flow, causing the water flow to form turbulence when passing through the thrust portion 17. Effective management and optimization of the water flow is achieved, and the efficiency and stability of the fluid treatment system are significantly improved. This design not only helps to reduce bacterial growth and sediment accumulation, but also extends the service life of key components such as membranes, and reduces the maintenance cost of the system. Several through holes for water inlet and outlet on the outer peripheral surface of the reinforcement portion 18 can realize the circulation of liquid and ensure smooth water flow during the filtration process. The connecting portion 19 is located at the center hole, and is connected to the external pipeline through the first end to discharge the produced water, thereby realizing the effective export of the produced water after filtration.

[0072] In a possible embodiment, the quick-release end cover assembly 8 further includes:

[0073] A pressure plate 20, wherein the pressure plate 20 is a bowl-shaped structure matching the thrust portion 17;

[0074] An adapter 21, wherein the adapter 21 connects an adjacent membrane filtration assembly 3 and the integrated thrust member 16, the adapter 21 is disposed inside the reinforcement portion 18, the adapter 21 is located on the central axis of the flat membrane filtration device, one end of the adapter 21 is connected to the second end portion of the connection portion 19, and the other end of the adapter 21 is connected to an adjacent membrane filtration assembly 3;

[0075] The retaining ring 22 is surrounded by three retaining rings 23 , and the three retaining rings 23 form an annular groove 24 inside. An elastic locking ring 25 is arranged in the groove 24 , and the elastic locking ring 25 is used to lock the position between the retaining ring 22 and the membrane shell 1 .

[0076] Specifically, the pressure plate 20 is a bowl-shaped structure matched with the thrust part 17. The pressure plate 20 cooperates with the thrust part 17 to more evenly withstand the pressure from the inside, thereby enhancing the stability and sealing of the quick-release end cap assembly 8. The adapter 21 is located on the central axis, connecting the adjacent membrane filtration assembly 3 and the integrated thrust component 16, ensuring the close connection and force transmission between the filtration assembly and the integrated thrust component 16, making the entire structure more stable, and ensuring smooth flow of fluid during the filtration process.

[0077] The retaining ring 22 is surrounded by three retaining rings 23, and the elastic locking ring 25 in the internal annular groove 24 is used to lock the position between the retaining ring 22 and the membrane shell 1. The elastic locking ring 25 can tightly lock the position between the retaining ring 22 and the membrane shell 1 through its unique elastic deformation ability, while ensuring good sealing. This can prevent the end cover assembly from loosening or displacement during operation, ensure the reliable connection between the quick-release end cover assembly 8 and the membrane shell 1, and thus maintain the sealing and stability of the entire filtration device. This design makes the disassembly and assembly of the end cover simple and quick, and quick separation and installation can be achieved by gently rotating or pushing and pulling.

[0078] In a possible embodiment, a thrust ring sealing groove is formed at the edge of the thrust portion 17, and a first lip ring is provided inside the thrust ring sealing groove; a first O-ring is provided at the contact position between the adapter 21 and the connecting portion 19, and a second O-ring is provided at the connecting position between the adapter 2 and the center rod 6.

[0079] Specifically, the first lip ring arranged in the thrust ring sealing groove at the edge of the thrust portion 17 is squeezed and elastically deformed when the thrust portion contacts the membrane shell 1, thereby tightly filling the gap between the thrust portion and the membrane shell 1, and effectively preventing the fluid from leaking from this contact position. The first O-ring arranged at the contact position between the adapter 21 and the connecting portion 19 is compressed when the two are in contact with each other and subjected to a certain pressure, and its annular structure can seal the contact part in all directions to prevent the fluid from leaking from there. The second O-ring at the connection position between the adapter 21 and the center rod 6 is deformed when the adapter is connected to the center rod and subjected to force, filling the connection gap and preventing the fluid from leaking.

[0080] See also Figure 8 and Fig. 9 In a possible embodiment, the membrane filtration assembly 3 further includes a universal end plate 26, and the universal end plate 26 includes:

[0081] An end plate body 27, wherein the end plate body 27 is a planar disc-shaped structure with a central hole;

[0082] The tangential flow reinforcement ribs 28 include radial reinforcement ribs 29 and circumferential reinforcement ribs 30; the circumferential reinforcement ribs 30 are annular structures circumferentially arranged on the end plate body 27, and the circumferential reinforcement ribs 30 are used to guide the direction of the incoming water flow; the radial reinforcement ribs 29 are arc structures distributed radially from the center hole to the circumference, and the radial reinforcement ribs 29 are used to guide the direction of the incoming water flow.

[0083] Specifically, the end plate body 27 serves as the basic structure, and the center hole of the end plate body 27 is used to install and fix peripheral components. The circumferential reinforcement ribs 30 in the shear flow reinforcement ribs 28 are arranged along the circumference of the end plate body 27 to form an annular structure. When the incoming water flow contacts the circumferential reinforcement ribs 30, it will flow along the direction guided by them, thereby achieving uniform distribution of the water flow in the circumferential direction, ensuring that all parts of the diaphragm 4 can be fully utilized, and improving the filtration efficiency. The radial reinforcement ribs 29 are distributed in an arc shape from the center hole to the circumference in the radial direction. After passing through the center hole, the incoming water flow will be guided by the radial reinforcement ribs 29 and diffuse to the edge of the end plate body 27, further optimizing the distribution of the water flow, effectively guiding the water flow to enter the interior of the membrane element in a rotating posture, forming a rotating water flow on the membrane surface, reducing the turbulence and local concentration of the water flow, and making the filtration process smoother and more efficient. At the same time, it helps to reduce the deposition and accumulation of dirt on the membrane surface, enhances the flushing effect of water flow, further reduces the risk of fouling, ensures the long-term stable operation of the membrane elements, and improves the durability and service life of the membrane elements.

[0084] In a possible embodiment, each of the guide plates 5 is provided with a fourth sealing ring on the upper and lower sides, and a diaphragm 4 is clamped between every two guide plates 5; a second sealing ring is provided in the center rod sealing groove on the center rod 6; and a second lip ring is provided in the end plate sealing groove of the universal end plate 26.

[0085] In a possible embodiment, the universal end plate 26 is provided with an upper end interface 31 and a lower end interface 32;

[0086] The upper end interface 31 of the universal end plate 26 located at the upper part of the membrane filtration assembly 3 is connected to the central rod 6 through a fastening nut, and the lower end interface 32 of the universal end plate 26 located at the upper part of the membrane filtration assembly 3 is connected to the adjacent guide plate 5;

[0087] The upper end interface 31 of the universal end plate 26 at the lower part of the membrane filtration assembly 3 is connected to the adjacent guide plate 5, and the lower end interface 32 of the universal end plate 26 at the lower part of the membrane filtration assembly 3 is connected to the center rod 6 through a fastening nut.

[0088] Specifically, for the universal end plate 26 located at the upper part of the membrane filtration assembly 3, the upper end interface 31 of the universal end plate 26 is connected to the center rod 6 through a fastening nut, so that the universal end plate 26 can be firmly fixed on the center rod 6 to ensure the stability of the position of the upper universal end plate 26. The lower end interface 32 is connected to the adjacent guide plate 5, so that the universal end plate 26 and the guide plate 5 are tightly combined to ensure the smooth transmission of water flow and the continuity of the filtration process.

[0089] The universal end plate 26 at the bottom of the membrane filtration assembly 3 has an upper interface 31 connected to the adjacent guide plate 5, and a lower interface 32 connected to the center rod 6 through a fastening nut. This connection method also ensures the stability of the lower end plate, making the entire membrane filtration assembly 3 more compact and stable in structure. This different connection method of the universal end plate 26 enables the membrane filtration assembly 3 to work effectively when the membrane filtration assembly 3 is working, whether it is the upper or lower universal end plate 26, ensuring the uniform distribution of water flow and efficient filtration, while enhancing the structural strength and stability of the entire membrane filtration assembly 3.

[0090] In a possible embodiment, the central rod 6 is a hollow structure, and a plurality of water-permeable holes 33 are distributed on the central rod 6 . The water-permeable holes 33 are used to collect the produced water after being filtered by the guide plate 5 and the membrane 4 .

[0091] Specifically, the center rod 6 is designed as a hollow structure, which provides storage space for the filtered water. During the filtering process, the water filtered by the guide plate 5 and the membrane 4 can enter the center rod 6 through the plurality of water holes 33 distributed on the center rod 6. The water holes 33 are evenly distributed on the center rod 6, so that the water can smoothly enter the center rod 6 from various positions, ensuring the comprehensiveness and efficiency of the water collection. This structural design can effectively collect the filtered water and concentrate it inside the center rod 6 for subsequent discharge or treatment.

[0092] See also Fig.10 , the working principle of the present invention is as follows:

[0093] The liquid to be filtered enters from the first water inlet at one end of the membrane housing 1, and water can also enter from the Nth water inlet at the other end. After the liquid enters the accommodating chamber 2 of the membrane housing 1, it flows through the membrane filtration assembly 3. In the membrane filtration assembly 3, a membrane 4 is installed between two adjacent guide plates 5, and the liquid flows evenly through the surface of the membrane 4 under the guidance of the guide plate 5 for filtration.

[0094] Among them, the connecting component 7 connects the adjacent membrane filtration components 3, and acts as a partition between the adjacent n+1th water inlet and nth water outlet, or between the n-1th water outlet and the nth water inlet, so that the liquid flows along the set path to ensure the orderly filtration. The quick-release end cap assembly 8 is installed at both ends of the membrane shell 1 to seal and tighten the membrane filtration component 3 to ensure the sealing and stability of the entire device. The filtered concentrated water flows out from the first water outlet to the Nth water outlet. Among them, the nth water inlet and the nth water outlet at the two ends of each membrane filtration component 3 in the middle section of the membrane shell 1 can also participate in the control of the inlet and outlet of the liquid, and are connected through multiple center rods 6, so that the treated water can be produced from the end of the edge center rod 6.

[0095] In summary, the connection assembly 7 of the present invention plays the role of connection, partition and water flow management. The partition 9 is located at the longitudinal center line position of the connection assembly 7. The partition 9 effectively separates the water inlet and outlet of two adjacent membrane filter assemblies 3, prevents the liquid from flowing chaotically between the two membrane filter assemblies 3, and ensures that each membrane filter assembly 3 can be filtered according to the predetermined process. Among them, the first support member 10 and the second support member 11 are respectively located on both sides of the partition member 9, and are connected to the partition member 9 as a whole, providing structural support for the entire connection assembly 7, and enhancing the stability and strength of the connection assembly 7. The connecting pipe 12 runs through the first support member 10, the partition member 9 and the second support member 11, and is located in the center position. The connecting pipe 12 plays the role of the central rod 6 connecting the two adjacent membrane filter assemblies 3, so that the adjacent membrane filter assemblies 3 can be tightly connected in structure, and it also helps to maintain the integrity and stability of the entire filtration device. The partition 9 is a planar disc-shaped structure with a center hole, and the center hole is used to allow the connecting pipe 12 to pass through. The shape of the planar disc can well separate the inlet and outlet of the adjacent membrane filter components 3 in the longitudinal direction, realize the separation of liquid flow, and ensure that each membrane filter component 3 works independently. The first support member 10 and the second support member 11 are both bowl-shaped structures with hollow interiors. This shape increases the strength and stability of the structure and can withstand certain pressure and impact force. The reinforcing ribs 13 arranged at the ends of the first support member 10 and / or the second support member 11 further enhance the strength of the ends, prevent deformation or damage during use, and improve the durability of the entire connecting assembly 7. The support ribs 14 arranged along the circumferential direction on the outer peripheral surface of the first support member 10 and / or the second support member 11 can increase the contact area with the inner wall of the accommodating chamber 2, improve the stability of the support, and reduce shaking and displacement. The water holes 15 arranged on the outer peripheral surface of the first support member 10 and / or the second support member 11 allow the liquid to pass smoothly, while maintaining a certain flow rate and pressure control, which helps to optimize the liquid flow distribution during the filtration process. The thrust portion 17 is a concave bowl-shaped structure that can match the structure inside the membrane shell 1, play a role in thrust and positioning, and prevent the membrane filtration assembly 3 from excessive displacement during operation. The trumpet-shaped structure of the reinforcement portion 18 can increase the strength and stability of the component. The annular reinforcement ribs arranged at axial intervals further strengthen the structure of the reinforcement portion 18, so that it can withstand greater pressure and external forces and is not easily deformed or damaged. Several through holes for water inlet and outlet on the outer peripheral surface of the reinforcement portion 18 can realize the circulation of liquid and ensure smooth water flow during the filtration process. The connecting portion 19 is located at the center hole and is connected to an external pipeline through the first end to discharge the produced water, thereby realizing the effective export of the produced water after filtration. The end plate body 27 serves as the basic structure, and the center hole of the end plate body 27 is used to install and fix peripheral components. The circumferential reinforcement ribs 30 in the shear flow reinforcement ribs 28 are arranged along the circumference of the end plate body 27 to form an annular structure.When the incoming water flow contacts the circumferential reinforcing ribs 30, it will flow in the direction guided by them, thereby achieving uniform distribution of water flow in the circumferential direction, ensuring that all parts of the diaphragm 4 can be fully utilized, and improving the filtration efficiency. The radial reinforcing ribs 29 are distributed in an arc shape from the center hole to the circumference in the radial direction. After passing through the center hole, the incoming water flow will be guided by the radial reinforcing ribs 29 and diffuse to the edge of the end plate body 27, further optimizing the distribution of the water flow, reducing the turbulence and local concentration of the water flow, and making the filtration process more stable and efficient. The present invention greatly reduces the types and quantities of components, simplifies the installation process, and improves the installation efficiency; reduces material consumption and production costs, and the design of the quick-release end cover assembly 8 also simplifies the maintenance process and reduces maintenance costs; by introducing the parallel inlet and outlet design, the parallel and uniform flow of water in the membrane shell 1 body is achieved, ensuring that each membrane combination element can receive an equal amount of water flow and pressure, improving the filtration efficiency and stability; achieving efficient space utilization and reducing floor space.

[0096] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0097] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A flat membrane filtration device, characterized in that: include: A membrane shell (1), wherein a receiving cavity (2) is formed inside the membrane shell (1); A plurality of membrane filtration assemblies (3), wherein the membrane filtration assemblies (3) are arranged in the accommodating cavity (2), and the membrane filtration assemblies (3) comprise a plurality of filtration elements consisting of membrane sheets (4) and guide plates (5), wherein the membrane sheets (4) are installed between two adjacent guide plates (5); A central rod (6), the central rod (6) passing through the diaphragm (4) and the guide plate (5); a plurality of connection components (7), wherein the connection components (7) are arranged in the accommodating chamber (2), and the connection components (7) are used to connect two adjacent membrane filtration components (3); A quick-detachable end cap assembly (8), the quick-detachable end cap assembly (8) being arranged at both ends of the membrane shell (1), the quick-detachable end cap assembly (8) being used to seal and fasten the membrane filtration assembly (3); The membrane shell (1) is provided with a first water inlet and an Nth water outlet at both ends thereof, the first water inlet is provided with a first water outlet, and the Nth water outlet is provided with an Nth water inlet; the middle section of the membrane shell (1) is provided with an nth water inlet and an nth water outlet at both ends of each membrane filtration assembly (3); The adjacent n+1th water inlet and nth water outlet, or the adjacent n-1th water outlet and nth water inlet are separated by the connecting component (7), 1<n-1<n<n+1<N, n, N are all positive integers.

2. A flat membrane filtration device according to claim 1, characterized in that: The connection component (7) comprises: A partition member (9), the partition member (9) being located at the longitudinal center line of the connecting assembly (7), the partition member (9) being used to separate the water inlet and outlet of two adjacent membrane filtration assemblies (3); a first support member (10) and a second support member (11), wherein the first support member (10) and the second support member (11) are located on both sides of the partition member (9), and the first support member (10) and the second support member (11) are connected to the partition member (9) as a whole; A connecting pipe (12), the connecting pipe (12) passes through the first supporting member (10), the partition member (9) and the second supporting member (11), the connecting pipe (12) is arranged at a central position of the first supporting member (10), the partition member (9) and the second supporting member (11), and the connecting pipe (12) connects the central rods (6) of two adjacent membrane filtration assemblies (3).

3. A flat membrane filtration device according to claim 2, characterized in that: The partition member (9) is a planar disc-shaped structure with a central hole; the first support member (10) and the second support member (11) are both bowl-shaped structures with a hollow interior.

4. A flat membrane filtration device according to claim 3, characterized in that: The ends of the first support member (10) and / or the second support member (11) are provided with reinforcing ribs (13); A plurality of support ribs (14) arranged along the circumferential direction are provided on the outer peripheral surface of the first support member (10) and / or the second support member (11).

5. A flat membrane filtration device according to claim 4, characterized in that: Water holes (15) are provided on the outer circumferential surfaces of the first support member (10) and the second support member (11); the water holes (15) are formed between the support ribs (14).

6. A flat membrane filtration device according to claim 1, characterized in that: The quick-detachable end cover assembly (8) comprises: An integrated thrust component (16), the integrated thrust component (16) comprising a thrust portion (17), a reinforcement portion (18) and a connection portion (19); the thrust portion (17) is an inwardly concave bowl-shaped structure; the reinforcement portion (18) is a trumpet-shaped structure, the reinforcement portion (18) is provided with annular reinforcement ribs at intervals in the axial direction, and the outer peripheral surface of the reinforcement portion (18) is provided with a plurality of through holes for water inlet and outlet; the connection portion (19) is located at the center hole of the integrated thrust component (16), the connection portion (19) is provided with a first end portion and a second end portion, and the connection portion (19) is connected to an external pipeline through the first end portion for external discharge of produced water.

7. A flat membrane filtration device according to claim 6, characterized in that: The quick-release end cap assembly (8) further comprises: A pressure-bearing plate (20), the pressure-bearing plate (20) being a bowl-shaped structure matching the thrust portion (17); an adapter (21), the adapter (21) connecting an adjacent membrane filtration assembly (3) and the integrated thrust component (16), the adapter (21) being arranged inside the reinforcement portion (18), the adapter (21) being located on the central axis of the flat membrane filtration device, one end of the adapter (21) being connected to the second end portion of the connection portion (19), and the other end of the adapter (21) being connected to an adjacent membrane filtration assembly (3); A retaining ring (22), the retaining ring (22) being surrounded by three retaining rings (23), the interior of the three retaining rings (23) forming an annular groove (24), an elastic locking ring (25) being provided in the groove (24), the elastic locking ring (25) being used to lock the position between the retaining ring (22) and the membrane shell (1).

8. A flat membrane filtration device according to claim 2, characterized in that: The membrane filtration assembly (3) further comprises a universal end plate (26), wherein the universal end plate (26) comprises: An end plate body (27), wherein the end plate body (27) is a planar disc-shaped structure with a central hole; The tangential flow reinforcement ribs (28) include radial reinforcement ribs (29) and circumferential reinforcement ribs (30); the circumferential reinforcement ribs (30) are annular structures circumferentially arranged on the end plate body (27); the circumferential reinforcement ribs (30) are used to guide the direction of the incoming water flow; the radial reinforcement ribs (29) are arc-shaped structures distributed radially from the center hole to the circumference; the radial reinforcement ribs (29) are used to guide the direction of the incoming water flow.

9. A flat membrane filtration device according to claim 8, characterized in that: The universal end plate (26) is provided with an upper end interface (31) and a lower end interface (32); The upper end interface (31) of the universal end plate (26) located at the upper part of the membrane filtration assembly (3) is connected to the central rod (6) via a fastening nut, and the lower end interface (32) of the universal end plate (26) located at the upper part of the membrane filtration assembly (3) is connected to the adjacent guide plate (5); The upper end interface (31) of the universal end plate (26) located at the bottom of the membrane filtration assembly (3) is connected to the adjacent guide plate (5), and the lower end interface (32) of the universal end plate (26) located at the bottom of the membrane filtration assembly (3) is connected to the center rod (6) via a fastening nut.

10. A flat membrane filtration device according to claim 1, characterized in that: The central rod (6) is a hollow structure, and a plurality of water permeable holes (33) are distributed on the central rod (6). The water permeable holes (33) are used to collect the produced water after being filtered by the guide plate (5) and the membrane (4).

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