Membrane filtration system

Abstract

The utility model relates to a membrane filtration system which comprises a water collecting pipeline and a membrane filtration device installed on the water collecting pipeline, the membrane filtration device is provided with a membrane element, and the water collecting pipeline comprises a water production header pipe, a water inlet header pipe and a water drainage header pipe which are arrayed in the same plane in the horizontal direction and are provided with closed upper ends and open lower ends; the water production manifolds are symmetrically communicated with the two sides of the water production header pipe and are rigidly connected with the water inlet header pipe and the water drainage header pipe respectively; the water inlet manifolds are symmetrically communicated with the two sides of the water inlet header pipe and are rigidly connected with the water production header pipe and the water drainage header pipe respectively; the drainage manifolds are symmetrically communicated with the two sides of the drainage main pipe and are rigidly connected with the water inlet main pipe and the water production main pipe respectively; a penetrating fluid outlet communicated with the water producing manifold, a pretreatment liquid inlet communicated with the water inlet manifold and a concentrated liquid outlet communicated with the water discharging manifold are formed in the membrane element. The manifolds and the membrane elements are installed in a simplified and matched mode, the manifolds and the header pipe are supported by each other through rigid connection, and the auxiliary fixing structure is simplified.

Description

Technical Field

[0001] The present application relates to the field of water treatment technology, and in particular to a membrane filtration system. Background Art

[0002] With the development of water treatment technology, membrane separation technology has emerged. Membrane separation systems can achieve water purification through integrated membrane filtration devices. Generally, water treatment systems at the application site will include multiple sets of membrane filtration devices to achieve water treatment. Membrane filtration devices mainly use assembled interconnecting structures to combine membrane elements and then integrate them into the water treatment system. However, these assembled interconnecting structures are usually complex and costly, requiring the use of a large number of profiles as auxiliary support frames. After installation, they are in the form of complete machines. The filling density of the membrane elements in the system is low, and the overall membrane filtration device occupies a large space to achieve the water treatment effect. This leads to high requirements for the transportation environment and installation conditions. Utility Model Content

[0003] Based on this, it is necessary to provide a membrane filtration system with an optimized assembly connection structure of membrane elements to address the problem of unreasonable assembly of membrane elements in the membrane filtration treatment system.

[0004] A membrane filtration system includes a water collection pipeline and a membrane filtration device installed on the water collection pipeline, wherein the membrane filtration device is provided with a membrane element, and the water collection pipeline includes: a water production main pipe, a water inlet main pipe, and a water discharge main pipe arranged in a horizontal direction and on the same plane, with the upper end closed and the lower end open;

[0005] The water production manifolds are symmetrically connected to both sides of the water production main pipe, and the water production manifolds are rigidly connected to the water inlet main pipe and the drainage main pipe respectively;

[0006] The water inlet manifolds are symmetrically connected on both sides of the water inlet main pipe, and the water inlet manifolds are rigidly connected to the water production main pipe and the drainage main pipe respectively;

[0007] The drainage manifolds are symmetrically connected on both sides of the drainage main pipe, and the drainage manifolds are rigidly connected to the water inlet main pipe and the water production main pipe respectively;

[0008] The membrane element is provided with a permeate outlet connected to the water production manifold, a pre-treated liquid inlet connected to the water inlet manifold, and a concentrated liquid outlet connected to the drainage manifold.

[0009] In one embodiment, the membrane filtration devices are arranged on both sides of the water collection pipeline.

[0010] In one embodiment, the water production manifold is connected to the water production main pipe through a water production connecting pipe;

[0011] The water inlet manifold is connected to the water inlet main pipe through the water inlet connecting pipe;

[0012] The drainage manifold is connected to the drainage main pipe through the drainage connecting pipe;

[0013] The water production manifold, water inlet manifold and discharge manifold located on the same side are placed in the same vertical plane.

[0014] In one embodiment, the water production manifold is rigidly connected to the water inlet main pipe and the water discharge main pipe through a water production pipe fixing member;

[0015] The water inlet manifold is rigidly connected to the water production main pipe and the drainage main pipe through the water inlet pipe fixing piece;

[0016] The drainage manifold is rigidly connected to the water production main pipe and the water inlet main pipe through drainage pipe fixings.

[0017] In one embodiment, the water production manifold is arranged vertically relative to the water production main pipe;

[0018] The water inlet manifold is arranged vertically relative to the water inlet main pipe;

[0019] The drainage manifold is arranged vertically relative to the drainage main pipe.

[0020] In one embodiment, the water production manifold has a plurality of water production ports arranged at intervals along its length for connecting to the permeate outlet;

[0021] The water inlet manifold is provided with a plurality of water inlet ports for connecting to the pretreatment liquid inlet at intervals along its length;

[0022] The drainage manifold is provided with a plurality of drainage ports for connecting to the concentrated liquid outlet, which are arranged at intervals along its length.

[0023] In one embodiment, the number of water production ports, water inlet ports and water discharge ports corresponds to the number of sets, and each set is equipped with a membrane element.

[0024] In one embodiment, the water collection pipeline also includes an aeration pipe placed in the same plane as the water production main pipe, the water inlet main pipe and the drainage main pipe. The bottom end of the aeration pipe is open and aeration manifolds are symmetrically arranged on both sides. The aeration manifold is used to connect the membrane elements.

[0025] In one embodiment, the water collection pipeline further includes: reinforcement plates for fixing and limiting the water production main pipe, the water inlet main pipe and the drainage main pipe.

[0026] In one embodiment, the connections of the water production main pipe, the water inlet main pipe and the drainage main pipe are provided with exhaust devices.

[0027] The membrane filtration system includes a water collection pipeline and a membrane filtration device installed on the water collection pipeline. The membrane filtration device includes membrane elements. The water collection pipeline includes: a water production main pipe, a water inlet main pipe, and a drainage main pipe arranged in a horizontal direction. The centerlines of the water production main pipe, water inlet main pipe, and drainage main pipe lie in the same plane, and all three pipes are pipes with a top end sealed and a bottom end open. The water collection pipeline also includes a water production manifold connected to both sides of the water production main pipe. The water production manifolds on both sides are symmetrically arranged and rigidly connected to the water inlet main pipe and the drainage main pipe, respectively. Similarly, the water collection pipeline also includes water inlet manifolds symmetrically connected to both sides of the water inlet main pipe. The water inlet manifolds are rigidly connected to the water production main pipe and the drainage main pipe, respectively. Similarly, the water collection pipeline also includes drainage manifolds symmetrically connected to both sides of the drainage main pipe. The drainage manifolds are rigidly connected to the water inlet main pipe and the water production main pipe, respectively. The ends of the production manifold, water inlet manifold, and drainage manifold are all sealed. The membrane element is provided with a permeate outlet, a pretreatment liquid inlet, and a concentrate outlet. The permeate outlet is used to connect to the production manifold, the pretreatment liquid inlet is used to connect to the water inlet manifold, and the concentrate outlet is used to connect to the drainage manifold. During use, the pretreatment raw liquid enters the membrane element through the main water inlet port at the bottom of the water collection pipeline inlet manifold. The permeate is collected into the production manifold of the water collection pipeline through the permeate outlet in the middle of the membrane element and flows out of the main water production port at the bottom of the production manifold. The concentrate enters the drainage manifold of the water collection pipeline through the concentrate outlet of the membrane element and flows out of the main drainage port at the bottom of the drainage manifold.

[0028] While each manifold and main pipe connects to the membrane elements to form a water treatment circuit, they also achieve an integrated, mutually supportive structure through rigid connections on the outside of the necessary piping. This eliminates the need for additional auxiliary support structures, saving material costs and simplifying the interconnection structure. This facilitates standardized and modular production, and the water collection piping structure is highly versatile, adapting to various membrane element types based on actual needs. The resulting assembled membrane filtration system is more compact and stable, making it easier to transport and reducing on-site assembly complexity. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of a membrane filtration system provided in an embodiment of the present application.

[0030] Figure 2 for Figure 1 The structural diagram of the membrane element shown in FIG;

[0031] Figure 3 This is a schematic diagram of another membrane filtration system provided in an embodiment of the present application.

[0032] Figure 4 for Figure 3 The structural diagram of the membrane element shown in FIG;

[0033] Figure 5 A schematic structural diagram of a water collection pipeline provided in an embodiment of the present application;

[0034] Figure 6 for Figure 5 A perspective view of the local structure.

[0035] Figure Number:

[0036] 1-water collection pipe, 1.1-water production pipe, 1.2-water inlet pipe, 1.3-drainage pipe,

[0037] 2.1-water production manifold, 2.2-water inlet manifold, 2.3-discharge manifold,

[0038] 3-membrane element, 3.1-permeate outlet, 3.2-pretreatment liquid inlet, 3.3-concentrate outlet, 3.4-drain pipe,

[0039] 4.1-water production connecting pipe, 4.2-water inlet connecting pipe, 4.3-drainage connecting pipe,

[0040] 5.1-water pipe fixings, 5.2-water inlet pipe fixings, 5.3-drain pipe fixings,

[0041] 6.1-water production port, 6.2-water inlet port, 6.3-drainage port,

[0042] 7.1-Aeration pipe, 7.2-Aeration manifold,

[0043] 8-Reinforcement plate, 9-Exhaust device. DETAILED DESCRIPTION

[0044] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0045] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0046] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0047] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0048] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0050] See Figures 1-6 As shown, Figure 1 A schematic diagram of a membrane filtration system provided in an embodiment of the present application is shown. Figure 2 Shown Figure 1 The structural diagram of the membrane element shown in Figure 3 A schematic diagram of another membrane filtration system provided in an embodiment of the present application is shown. Figure 4 Shown Figure 3 The structural diagram of the membrane element shown in Figure 5 Another structural diagram of the water collection pipeline provided in the embodiment of the present application is shown. Figure 6 Shown Figure 5 A partial structural perspective view of a membrane filtration system according to one embodiment of the present application includes a water collection pipeline 1 and a membrane filtration device mounted on the water collection pipeline 1. The membrane filtration device includes membrane elements 3. The water collection pipeline 1 comprises a horizontally arranged water production main pipe 1.1, a water inlet main pipe 1.2, and a drainage main pipe 1.3. The centerlines of the water production main pipe 1.1, the water inlet main pipe 1.2, and the drainage main pipe 1.3 lie in the same plane, and all three pipes are open at the bottom with the top end sealed.

[0051] It should be noted that the relative heights of the above-mentioned water production main pipe 1.1, water inlet main pipe 1.2 and drainage main pipe 1.3 in the same vertical direction may vary, and the relative positions of the three pipes may also vary to accommodate the assembly of membrane elements 3 of various specifications.

[0052] The water collection pipeline 1 also includes a water production manifold 2.1 connected to both sides of the water production main pipe 1.1. The water production manifolds 2.1 on both sides are symmetrically arranged, and the water production manifolds 2.1 are rigidly connected to the water inlet main pipe 1.2 and the drainage main pipe 1.3, respectively. Similarly, the water collection pipeline 1 also includes a water inlet manifold 2.2 symmetrically connected to both sides of the water inlet main pipe 1.2, and the water inlet manifold 2.2 are rigidly connected to the water production main pipe 1.1 and the drainage main pipe 1.3, respectively. Similarly, the water collection pipeline 1 also includes a drainage manifold 2.3 symmetrically connected to both sides of the drainage main pipe 1.3, and the drainage manifold 2.3 are rigidly connected to the water inlet main pipe 1.2 and the water production main pipe 1.1, respectively. The water production manifold 2.1, the water inlet manifold 2.2, and the drainage manifold 2.3 are all provided with plugs at both ends.

[0053] For ease of description, the water production manifold 2.1, water inlet manifold 2.2, and drainage manifold 2.3 will be collectively referred to as individual manifolds. The water production main pipe 1.1, water inlet main pipe 1.2, and drainage main pipe 1.3 will be collectively referred to as individual main pipes. This designation is for descriptive purposes only and does not reflect actual technical effectiveness.

[0054] The membrane element 3 is provided with a permeate outlet 3.1, a pretreated liquid inlet 3.2, and a concentrate outlet 3.3. The permeate outlet 3.1 is connected to the produced water manifold 2.1, the pretreated liquid inlet 3.2 is connected to the inlet manifold 2.2, and the concentrate outlet 3.3 is connected to the drain manifold 2.3.

[0055] During use, the pretreated raw liquid enters the membrane element 3 through the total water inlet port at the bottom of the water inlet main pipe 1.2 of the water collection pipeline 1; the permeate is collected into the water production main pipe 1.1 of the water collection pipeline 1 through the permeate outlet 3.1 in the middle of the membrane element 3, and flows out from the total water production port at the bottom of the water production main pipe 1.1; the concentrated liquid enters the drainage main pipe 1.3 of the water collection pipeline 1 through the concentrated liquid outlet 3.3 of the membrane element 3, and flows out from the total drainage port at the bottom of the drainage main pipe 1.3.

[0056] While each manifold and main pipe connects to the membrane elements 3 to form a water treatment circuit, they also achieve a mutually supportive integrated structure through rigid connections on the outside of the necessary pipelines. This eliminates the need for additional auxiliary support structures, saving material costs and simplifying the interconnection structure. This facilitates standardized and modular production, and the highly versatile structure of the water collection pipeline 1 can accommodate a variety of membrane element 3 types based on actual needs. The resulting assembled membrane filtration system is more compact and stable, making it easier to transport and reducing the difficulty of on-site assembly.

[0057] It should be noted that the change in the relative position between the main pipes will not affect the specific usage logic. It is sufficient to meet the above-mentioned connectivity logic between the main pipes, manifolds, and membrane elements and the mutual fixed support logic on the outside of the pipelines.

[0058] Furthermore, the membrane elements 3 of the above-mentioned membrane filtration device are arranged on both sides of the water collection pipeline 1. Specifically, since the water production manifold 2.1, the water inlet manifold 2.2 and the discharge manifold 2.3 are symmetrically arranged on both sides of each main pipe, the overall integrated water channel can be arranged and installed with several membrane elements 3 on both sides, thereby increasing the density of the membrane elements 3 in the entire membrane filtration system, optimizing the overall volume, and increasing the installation amount of membrane elements 3.

[0059] It is foreseeable that in one embodiment of the application, the membrane element 3 is configured as a pressure-type membrane element, with a concentrate outlet 3.3 at the top, left and right through-type permeate outlets 3.1 in the middle, and left and right through-type pretreatment liquid inlets 3.2 at the bottom. The membrane elements 3 are sequentially arranged on both sides of the water collection pipeline 1 to form a complete membrane filtration system. The pretreatment raw liquid enters the membrane element 3 from the total water inlet port at the bottom of the water inlet main pipe 1.2. The permeate is collected into the water production main pipe 1.1 of the water collection pipeline 1 through the permeate outlet 3.1 in the middle of the membrane element 3 and flows out from the total water production port at the bottom of the water production main pipe 1.1. The concentrate is collected into the top sewage pipe 3.4 through the concentrate outlet 3.3 of the membrane element 3 and then enters the drainage main pipe 1.3 of the water collection pipeline 1, and flows out from the total drainage port at the bottom of the drainage main pipe 1.3.

[0060] In one embodiment of the application, the membrane element 3 is another type of pressure-type membrane element. The membrane element 3 has left and right through-type concentrate outlets 3.3 on the top, left and right through-type permeate outlets 3.1 in the middle, and left and right through-type pretreatment liquid inlets 3.2 on the bottom. The membrane elements 3 are arranged in sequence on both sides of the water collection pipeline 1 to form a complete membrane filtration device. The pretreatment raw liquid enters the membrane element 3 through the total water inlet port at the bottom of the water inlet main pipe 1.2 of the water collection pipeline 1; the permeate is collected into the water production main pipe 1.1 of the water collection pipeline 1 through the permeate outlet 3.1 in the middle of the membrane element 3, and flows out from the total water production port at the bottom of the water production main pipe 1.1; the concentrate enters the drainage main pipe 1.3 of the water collection pipeline 1 through the concentrate outlet 3.3 of the membrane element 3, and flows out from the total drainage port at the bottom of the drainage main pipe 1.3.

[0061] Furthermore, the water production manifold 2.1 is connected to the water production main pipe 1.1 through the water production connecting pipe 4.1; the water inlet manifold 2.2 is connected to the water inlet main pipe 1.2 through the water inlet connecting pipe 4.2; and the drainage manifold 2.3 is connected to the drainage main pipe 1.3 through the drainage connecting pipe 4.3.

[0062] Assuming the production water main pipe 1.1, the inlet water main pipe 1.2, and the drainage main pipe 1.3 are located in the same vertical plane, the production water connecting pipe 4.1, the inlet water connecting pipe 4.2, and the drainage connecting pipe 4.3 can be controlled in length and installation angle to ensure that the production water manifold 2.1, the inlet water manifold 2.2, and the drainage manifold 2.3, located on the same side, are placed in the same vertical plane. This arrangement prevents problems such as interlacing of the membrane elements 3 when the user installs them. The standardized installation plane of the membrane elements 3 improves efficiency during batch installation and reduces installation difficulty.

[0063] Of course, the specific structures and locations of the above-mentioned water production connecting pipe 4.1, water inlet connecting pipe 4.2 and drainage connecting pipe 4.3 can be changed according to actual needs to adapt to the assembly of membrane elements 3 of various specifications, which will not be elaborated in this article.

[0064] Furthermore, the water production manifold 2.1 is rigidly connected to the water inlet main pipe 1.2 and the drainage main pipe 1.3 via the water production pipe fixing member 5.1, maintaining interconnection and disconnection between the structures. The water inlet manifold 2.2 is rigidly connected to the water production main pipe 1.1 and the drainage main pipe 1.3 via the water inlet pipe fixing member 5.2, maintaining interconnection and disconnection between the structures. The drainage manifold 2.3 is rigidly connected to the water production main pipe 1.1 and the water inlet main pipe 1.2 via the drainage pipe fixing member 5.3, maintaining interconnection and disconnection between the structures.

[0065] The manifolds and main pipes are reinforced with fixtures to achieve an integrated structure, supporting and limiting each other, increasing structural stability while saving on additional material. The specific implementation structures of the aforementioned water production pipe fixtures 5.1, water inlet pipe fixtures 5.2, and drain pipe fixtures 5.3 can be configured as needed, referring to existing technologies, and will not be elaborated in this article.

[0066] Furthermore, the water production manifold 2.1 is vertically arranged relative to the water production main pipe 1.1; the water inlet manifold 2.2 is vertically arranged relative to the water inlet main pipe 1.2; and the drainage manifold 2.3 is vertically arranged relative to the drainage main pipe 1.3.

[0067] By arranging each manifold perpendicularly to the corresponding main pipe, the installation difficulty of the membrane element 3 can be simplified, the standardization of the structure can be enhanced, and production and installation can be facilitated.

[0068] Furthermore, the water production manifold 2.1 is provided with a plurality of water production ports 6.1 for connecting to the permeate outlet 3.1, spaced apart along its length. The water production ports 6.1 are arranged on the surface of the water production manifold 2.1 facing away from the water production main pipe 1.1. The gaps between the water production ports 6.1 are equidistantly arranged to leave space for the installation of the membrane element 3.

[0069] The water inlet manifold 2.2 is provided with a plurality of water inlet ports 6.2 spaced apart along its length for connecting to the pre-treatment liquid inlet 3.2. Similarly, the water inlet ports 6.2 are arranged on the surface of the water inlet manifold 2.2 facing away from the water inlet main pipe 1.2, and the gaps between the water inlet ports 6.2 are equidistant.

[0070] The drainage manifold 2.3 is provided with a plurality of drainage ports 6.3 spaced apart along its length for connecting to the concentrate outlet 3.3. Similarly, the drainage ports 6.3 are arranged on the surface of the drainage manifold 2.3 facing away from the main drainage pipe 1.3, and the gaps between the drainage ports 6.3 are arranged equidistantly.

[0071] Furthermore, the permeate ports 6.1, the water inlet ports 6.2, and the drain ports 6.3 are arranged in a one-to-one correspondence. Every three ports form a set, and each set houses one membrane element 3. While ensuring internal water circulation, the number of sets is determined based on the number of membrane elements 3 required by the system. By arranging the permeate ports 6.1, the water inlet ports 6.2, and the drain ports 6.3 as a set, the installation layout of the membrane elements 3 can be optimized, achieving a more compact and rational arrangement and increasing the density of the membrane elements 3.

[0072] Furthermore, the water collection pipeline 1 also includes an aeration pipe 7.1 placed in the same plane as the water production main pipe 1.1, the water inlet main pipe 1.2 and the drainage main pipe 1.3. The bottom end of the aeration pipe 7.1 is open and aeration manifolds 7.2 are symmetrically arranged on both sides. The aeration manifolds 7.2 are used to connect the membrane elements 3.

[0073] The configuration of the aeration system can be modified based on the type of membrane element 3, as long as the aforementioned connection mechanism achieves a connection and aeration between the integrated piping and the membrane element 3. The specific structure and connection method can be referenced in the prior art and will not be described in detail herein. Furthermore, the presence or absence of the aeration system can be modified based on actual needs. When adapting to certain types of membrane elements 3, an aeration system may not be required.

[0074] Furthermore, the water collection pipeline 1 also includes a reinforcement plate 8 that secures and limits the production water main pipe 1.1, the inlet water main pipe 1.2, and the drainage main pipe 1.3. This reinforcement plate 8 connects to the outer surfaces of each main pipe, preventing deviation and shaking between the main pipes and enhancing structural integrity and stability. The specific structure of this reinforcement plate 8 can be configured according to actual needs with reference to existing technologies and will not be detailed here.

[0075] Furthermore, exhaust devices 9 are provided at the connections between the water production main pipe 1.1, the water inlet main pipe 1.2, and the drainage main pipe 1.3. Exhaust devices 9 can communicate with the interior of the main pipes to achieve exhaust. The specific structure of the exhaust device 9 and the connection method of the pipes can refer to the existing technology and will not be detailed here.

[0076] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0077] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A membrane filtration system, characterized in that: The invention comprises a water collection pipeline (1) and a membrane filtration device installed on the water collection pipeline (1), wherein the membrane filtration device is provided with a membrane element (3), and the water collection pipeline (1) comprises: A water production main pipe (1.1), a water inlet main pipe (1.2) and a drainage main pipe (1.3) arranged in a horizontal direction and on the same plane, with the upper end closed and the lower end open; A water production manifold (2.1) symmetrically connected to both sides of the water production main pipe (1.1), the water production manifold (2.1) being rigidly connected to the water inlet main pipe (1.2) and the water discharge main pipe (1.3) respectively; A water inlet manifold (2.2) symmetrically connected to both sides of the water inlet main pipe (1.2), the water inlet manifold (2.2) being rigidly connected to the water production main pipe (1.1) and the drainage main pipe (1.3) respectively; A drainage manifold (2.3) symmetrically connected to both sides of the drainage main pipe (1.3), the drainage manifold (2.3) being rigidly connected to the water inlet main pipe (1.2) and the water production main pipe (1.1) respectively; The membrane element (3) is provided with a permeate outlet (3.1) connected to the water production manifold (2.1), a pre-treated liquid inlet (3.2) connected to the water inlet manifold (2.2), and a concentrated liquid outlet (3.3) connected to the drainage manifold (2.3).

2. The membrane filtration system according to claim 1, characterized in that The membrane filtration devices are arranged correspondingly on both sides of the water collection pipeline (1).

3. The membrane filtration system according to claim 1, characterized in that The water production manifold (2.1) is connected to the water production main pipe (1.1) via a water production connecting pipe (4.1); The water inlet manifold (2.2) is connected to the water inlet main pipe (1.2) via a water inlet connecting pipe (4.2); The drainage manifold (2.3) is connected to the drainage main pipe (1.3) via a drainage connecting pipe (4.3); The water production manifold (2.1), the water inlet manifold (2.2) and the water discharge manifold (2.3) located on the same side are placed in the same vertical plane.

4. The membrane filtration system according to claim 1, characterized in that The water production manifold (2.1) is rigidly connected to the water inlet main pipe (1.2) and the water discharge main pipe (1.3) via a water production pipe fixing member (5.1); The water inlet manifold (2.2) is rigidly connected to the water production main pipe (1.1) and the drainage main pipe (1.3) via a water inlet pipe fixing member (5.2); The drainage manifold (2.3) is rigidly connected to the water production main pipe (1.1) and the water inlet main pipe (1.2) via a drainage pipe fixing piece (5.3).

5. The membrane filtration system according to claim 4, characterized in that The water production manifold (2.1) is arranged vertically relative to the water production main pipe (1.1); The water inlet manifold (2.2) is arranged vertically relative to the water inlet main pipe (1.2); The drainage manifold (2.3) is arranged vertically relative to the drainage main pipe (1.3).

6. The membrane filtration system according to claim 1, characterized in that The water production manifold (2.1) is provided with a plurality of water production ports (6.1) arranged at intervals along its length for connecting to the permeate outlet (3.1); The water inlet manifold (2.2) is provided with a plurality of water inlet ports (6.2) arranged at intervals along its length for connecting to the pretreatment liquid inlet (3.2); The drainage manifold (2.3) is provided with a plurality of drainage ports (6.3) arranged at intervals along its length direction for connecting to the concentrated liquid outlet (3.3).

7. The membrane filtration system according to claim 6, characterized in that The water production ports (6.1), the water inlet ports (6.2), and the drainage ports (6.3) are arranged in corresponding sets in number, and each set is equipped with one membrane element (3).

8. The membrane filtration system according to claim 1, characterized in that The water collection pipeline (1) further comprises an aeration pipe (7.1) placed in the same plane as the water production main pipe (1.1), the water inlet main pipe (1.2) and the drainage main pipe (1.3); the bottom end of the aeration pipe (7.1) is open and aeration manifolds (7.2) are symmetrically arranged on both sides; the aeration manifolds (7.2) are used to communicate with the membrane elements (3).

9. The membrane filtration system according to claim 1, characterized in that The water collection pipeline (1) further comprises a reinforcement plate (8) for fixing and limiting the water production main pipe (1.1), the water inlet main pipe (1.2) and the drainage main pipe (1.3).

10. The membrane filtration system according to claim 1, characterized in that An exhaust device (9) is provided at the connection between the water production main pipe (1.1), the water inlet main pipe (1.2) and the drainage main pipe (1.3).

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