Immersed membrane separator

Abstract

The invention provides an immersed membrane separator which comprises a plurality of rows of membrane assemblies, a first adapter, a water production branch pipe and a water production header pipe, the multiple rows of membrane assemblies are sequentially arranged in the front-back direction, each row of membrane assemblies comprises a membrane element and an upper water collecting pipe located above the membrane element, and the upper water collecting pipe of each row of membrane assemblies is provided with a water production outlet; a plurality of connectors are sequentially arranged in the length direction of the water production header pipe at intervals, a first adapter is connected between each water production outlet and a first port of each water production branch pipe, and the first adapter is detachably connected with at least one of the water production outlets and the first ports of the water production branch pipes; and the second port of each water production branch pipe is connected with one interface. The membrane component of the immersed membrane separator not only can be manually inserted and pulled up and down to be disassembled and assembled, but also can obviously reduce the damage probability of a water producing outlet of the membrane component in the process of disassembling and assembling the membrane component, so that the use cost of the immersed membrane separator is reduced.

Description

Technical Field

[0001] The present application relates to the field of microfiltration or ultrafiltration membrane separation technology, and in particular to an immersed membrane separator. Background Art

[0002] The submerged membrane separator is the core component of the submerged membrane filtration (SMF) system. It consists of the membrane assembly, permeate branch pipes, and a main permeate pipe. It is placed in the membrane tank for use. During operation, the membrane assembly must be regularly removed for inspection, cleaning, and other operations.

[0003] At present, the process of disassembling the membrane assembly of the submerged membrane separator on the market is likely to damage the water outlet of the membrane assembly. Moreover, the membrane assembly is a complete structure. Once the water outlet is damaged, the entire membrane assembly must be replaced, resulting in high operating costs of the submerged membrane separator.

[0004] In view of this, how to reduce the damage probability of the water output outlet is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In order to solve the above technical problems, the present application provides an immersed membrane separator, comprising a membrane assembly, a first adapter, a water production branch pipe and a water production main pipe, wherein multiple rows of the membrane assemblies are arranged in sequence along the front-to-back direction, each row of the membrane assemblies comprises a membrane element and an upper water collecting pipe located above the membrane element, the upper water collecting pipe of each row of the membrane assemblies is provided with a water production outlet, and multiple interfaces are arranged in sequence at intervals in the length direction of the water production main pipe, a first adapter is connected between each of the water production outlets and the first port of each of the water production branch pipes, the first adapter is detachably connected to at least one of the water production outlet and the first port of the water production branch pipe, and the second port of each of the water production branch pipes is respectively connected to one of the interfaces.

[0006] In one embodiment of the submerged membrane separator, the produced water main pipe is arranged on the left or right side of the multiple rows of membrane modules, extends in the front-to-back direction, and is lower than the produced water outlet.

[0007] In one embodiment of the submerged membrane separator, the first port of the water production branch pipe and the water production outlet are arranged to the left or right, and the two ends of the first adapter are respectively connected to the first port and the water production outlet of the water production branch pipe in the left and right directions, and the water production branch pipe is a flexible tube.

[0008] In one embodiment of the submerged membrane separator, the water production branch pipe is a flexible pipe, one end of the first adapter passes through the first port and is inserted into the water production branch pipe, and a detachable first clamp is provided outside the water production branch pipe to tighten the water production branch pipe and the first adapter.

[0009] In one embodiment of the submerged membrane separator, one end of the first adapter passes through the produced water outlet and is inserted into the upper water collecting pipe, and a sealing ring is provided between the first adapter and the upper water collecting pipe for sealing.

[0010] An embodiment of the submerged membrane separator includes a second adapter, each interface of the water production main pipe is connected to a second adapter, and each second adapter is detachably connected to the second port of a water production branch pipe.

[0011] In one embodiment of the submerged membrane separator, the water production branch pipe is a flexible pipe, one end of the second adapter passes through the second port and is inserted into the corresponding water production branch pipe, and a detachable second clamp is provided outside the water production branch pipe to tighten the water production branch pipe and the second adapter.

[0012] An embodiment of an immersed membrane separator, the immersed membrane separator includes a bracket and a pressure piece, the bracket is provided with a plurality of slots, the plurality of slots are arranged in sequence along the front-to-back direction, each row of membrane assemblies is respectively inserted in one of the slots, the pressure piece presses above the multiple rows of membrane assemblies, the pressure piece is detachably connected to the bracket or the side wall of the membrane pool where the submerged membrane separator is located, each of the slots is provided with an upper notch, after the pressure piece is removed, the membrane assembly can move upward and leave the slot from the upper notch.

[0013] An embodiment of an immersed membrane separator, each of the slots includes an upper slot and a lower slot aligned vertically, the upper slot is arranged at the upper part of the bracket, and the lower slot is arranged at the lower part of the bracket, the bracket includes a support beam, and the support beam is at least partially located on the bottom side of the lower slot to support the membrane assembly in the slot, and the upper slot is lower than the upper water collecting pipe.

[0014] An embodiment of a submerged membrane separator, the submerged membrane separator includes an aeration assembly, the aeration assembly includes a collecting frame and an aeration pipeline, the collecting frame is fixed to the lower part of the bracket, a flow channel is provided inside the collecting frame, the collecting frame is provided with an air source interface (181a) for connecting to an external air source, the aeration pipeline is located below the membrane assembly, the aeration pipeline is connected to the internal flow channel of the collecting frame, and the aeration pipeline (182) is provided with an aeration hole.

[0015] The submerged membrane separator provided in the present application, when disassembling the membrane assembly, since a first adapter is connected between each water production outlet of the membrane assembly and the first port of each water production branch pipe, the first adapter is detachably connected to at least one of the water production outlet and the first port of the water production branch pipe. When disassembling the membrane assembly, the connection between the membrane assembly and the water production branch pipe can be disconnected by separating the first adapter and the first port of the water production branch pipe. In this case, the membrane assembly and the first adapter are disassembled together, or the connection between the membrane assembly and the first adapter can be disconnected by separating the first adapter and the water production outlet. In this case, the membrane assembly is disassembled alone. In both cases, the connection between the membrane assembly and the water production branch pipe can be disconnected, thereby avoiding the membrane assembly and the water production branch pipe being disassembled together. If the membrane assembly and the water production branch pipe are removed together, the water production branch pipe is long and can be easily touched by the operator. Moreover, one end of the water production branch pipe is connected to the water production outlet of the membrane assembly. Therefore, when the operator accidentally touches the water production branch pipe, it is easy for the water production branch pipe to pry off the side wall of the water production outlet, thereby rendering the entire membrane assembly scrapped. However, the water production branch pipe of the present application will not be removed together with the membrane assembly, thus solving the problem of easy damage to the water production outlet, reducing the chance of damage to the water production outlet, and thus reducing the use cost of the submerged membrane separator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of an embodiment of a water production device of the submerged membrane filtration system provided in this application;

[0017] Figure 2 for Figure 1 A partial enlarged view of the upper slot position;

[0018] Figure 3 for Figure 1 A partial enlarged view of the lower slot location;

[0019] Figure 4 for Figure 1 A partial enlarged view of the connection between the upper water collecting pipe and the water production branch pipe;

[0020] Figure 5 for Figure 1 A partial enlarged view of the connection between the water production branch pipe and the water production main pipe;

[0021] Figure 6 for Figure 1 A partial side view of

[0022] Figure 7 for Figure 6 A cross-sectional view of the first adapter;

[0023] The following are the descriptions of the reference numerals:

[0024] 11 Membrane assembly, 111 membrane element, 112 upper water collecting pipe, A produced water outlet, 113 lower water collecting pipe, 114 connecting pipe, 12 first adapter, B first limiting surface, C second limiting surface, 13 produced water branch pipe, 14 produced water main pipe, 14a interface, 15 second adapter, 16 bracket, 161 upper slot, 162 lower slot, 163 support beam, 17 pressure piece, 18 aeration assembly, 181 collecting frame, 181a air source interface, 182 aeration pipeline, 19 first clamp, 20 second clamp. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] like Figure 1 As shown, the submerged membrane separator provided in the present application includes a membrane assembly 11 , a first adapter 12 , a produced water branch pipe 13 , and a produced water main pipe 14 .

[0027] The multiple rows of membrane assemblies 11 are arranged in sequence. In the description of this application, the arrangement direction of the multiple rows of membrane assemblies 11 is the front-to-back direction. In the description of this application, the up-down direction refers to the direction perpendicular to the front-to-back direction, and the left-right direction refers to the direction perpendicular to both the front-to-back direction and the up-to-down direction.

[0028] like Figure 6 As shown, each row of membrane assemblies 11 includes membrane elements 111 and an upper water collecting pipe 112 located above the membrane elements 111. In the illustrated embodiment, each row of membrane assemblies 11 also includes a lower water collecting pipe 113 located below the membrane elements 111 and a connecting pipe 114 connected between the upper water collecting pipe 112 and the lower water collecting pipe 113, wherein the upper water collecting pipe 112 and the lower water collecting pipe 113 extend in the left-right direction, and the connecting pipe 114 extends in the up-down direction. The present application does not limit the type of membrane assembly 11 and the type of membrane element 111, such as common curtain membrane assemblies, bundle membrane assemblies, plate-and-frame membrane assemblies, column membrane assemblies, such as common hollow fiber membrane elements, flat membrane elements, and tubular membrane elements.

[0029] like Figure 6 As shown, the upper water collecting pipe 112 of each row of membrane modules 11 is provided with a produced water outlet A. In the illustrated embodiment, the upper water collecting pipe 112 extends in the left-right direction, with a produced water outlet A provided at each left and right end of the upper water collecting pipe 112. Alternatively, the upper water collecting pipe 112 of each row of membrane modules 11 may be provided with only one produced water outlet A.

[0030] like Figure 1As shown, multiple ports 14a are spaced apart along the length of the water main pipe 14. In the illustrated embodiment, the water main pipe 14 extends in the front-to-back direction, with one water main pipe 14 provided on each left and right side of the multiple rows of membrane modules 11, for a total of two water main pipes 14. Alternatively, a submerged membrane separator may be provided with only one water main pipe 14.

[0031] like Figure 1 As shown, a first adapter 12 is respectively connected between each produced water outlet A and the first port of each produced water branch pipe 13. The first adapter 12 is detachably connected to at least one of the first port of the produced water branch pipe 13 and the produced water outlet A. Specifically, the first adapter 12 can be detachably connected to the first port of the produced water branch pipe 13, while being fixedly connected to or integrally provided with the produced water outlet A; or, the first adapter 12 can be detachably connected to the produced water outlet A, while being fixedly connected to or integrally provided with the first port of the produced water branch pipe 13; or, the first adapter 12 can be detachably connected to the produced water outlet A, and also be detachably connected to the first port of the produced water branch pipe 13.

[0032] The second port of each water production branch pipe 13 is connected to a port 14a on the water production main pipe 14. In the illustrated embodiment, the water production branch pipe 13 connected to the left water production outlet A is connected to the corresponding port 14a on the left water production main pipe 14, while the water production branch pipe 13 connected to the right water production outlet A is connected to the corresponding port 14a on the right water production main pipe 14. The first port of the water production branch pipe 13 is higher than the second port.

[0033] During operation, the submerged membrane separator is located within the membrane tank. Water to be treated flows into the membrane tank, where impurities in the water are trapped by the membrane elements 111. The produced water then passes through the micropores of the membrane elements 111 and flows through the upper water collection pipe 112, the produced water branch pipe 13, and the produced water main pipe 14 to the produced water tank. The membrane assembly 11 needs to be removed periodically for cleaning, maintenance, and other operations.

[0034] In the past, when the membrane assembly 11 was disassembled, the water production branch pipe 13 would be disassembled together with the membrane assembly 11. After disassembly, the water production branch pipe 13 was long and therefore easily touched by the operator. Moreover, since one end of the water production branch pipe 13 was connected to the water production outlet A of the membrane assembly 11, if the operator accidentally touched the water production branch pipe 13, it would easily cause the water production branch pipe 13 to pry off the side wall of the water production outlet A, resulting in a high probability of damage to the water production outlet A, and even rendering the entire membrane assembly 11 scrapped.

[0035] In the submerged membrane separator provided in the present application, when the membrane assembly 11 is disassembled, the connection between the membrane assembly 11 and the water production branch pipe 13 can be disconnected by separating the first adapter 12 and the first port of the water production branch pipe 13. In this case, the membrane assembly 11 and the first adapter 12 are disassembled together, while the water production branch pipe 13 is not disassembled. This solves the problem of easy damage to the water production outlet A, reduces the probability of damage to the water production outlet A, and further reduces the cost of using the submerged membrane separator. It should be noted that because the length of the first adapter 12 is much shorter than the length of the water production branch pipe 13, it is not easily touched by the operator. Moreover, the first adapter 12 does not have a bend like the water production branch pipe 13. Therefore, even if it is touched by the operator, it will not generate a large prying force on the side wall of the water production outlet A, thereby preventing the side wall of the water production outlet A from being damaged.

[0036] Alternatively, when disassembling the membrane assembly 11, the connection between the membrane assembly 11 and the first adapter 12 can be disconnected by separating the first adapter 12 and the produced water outlet A. In this case, the membrane assembly 11 is disassembled alone, while the produced water branch pipe 13 and the first adapter 12 are not disassembled. Therefore, the problem of easy damage to the produced water outlet A is solved, the probability of damage to the produced water outlet A is reduced, and the use cost of the submerged membrane separator is reduced.

[0037] In some embodiments, such as Figure 1 As shown, the submerged membrane separator includes a bracket 16 and a pressure piece 17. The bracket 16 is provided with a plurality of slots, which are arranged in sequence along the front-to-back direction. Each membrane assembly 11 is respectively inserted into a slot, and the pressure piece 17 presses on the top of the membrane assembly 11. The pressure piece 17 is detachably connected to the bracket 16 or the side wall of the membrane pool where the submerged membrane separator is located. Each slot is provided with an upper notch. After the pressure piece 17 is removed, the membrane assembly 11 can move upward and leave the slot from the upper notch. With this design, when disassembling the membrane assembly 11, first remove the pressing member 17 and disconnect the membrane assembly 11 from the water production branch pipe 13, then move the membrane assembly 11 upward so that it leaves the slot from the upper notch; when assembling the membrane assembly 11, first move the membrane assembly 11 downward so that it is inserted into the slot from the upper notch, then assemble the pressing member 17 back and restore the connection between the membrane assembly 11 and the water production branch pipe 13; the disassembly and assembly process of the membrane assembly 11 does not require the use of lifting equipment and can be completed manually, thus avoiding the problem of damage to the membrane assembly 11 caused by the use of lifting equipment in a narrow space. In the illustrated embodiment, the pressing member 17 is a beam structure extending in the front-to-back direction, with connection holes provided at the front and rear ends of the beam structure, respectively, and connected to the bracket 16 by threaded fasteners. In actual implementation, it is not limited to this, as long as it can be detachably connected to the bracket 16 or the side wall of the membrane tank where the submerged membrane separator is located and can be pressed against the top of each row of membrane assemblies 11.

[0038] In some embodiments, the water production main pipe 14 is arranged on the left or right side of the membrane assembly 11, extending in the front-to-back direction and lower than the water production outlet A. Specifically, it is preferably 200 mm to 400 mm lower than the water production outlet A. For example, in the illustrated embodiment, two water production main pipes 14 are provided, both extending in the front-to-back direction. One water production main pipe 14 is arranged on the left side of the membrane assembly 11 and lower than the water production outlet A at the left end, and the other water production main pipe 14 is arranged on the right side of the membrane assembly 11 and lower than the water production outlet A at the right end. This design not only facilitates the neat arrangement of the water production branch pipes 13, but also ensures that the water production main pipes 14 do not interfere with the upward movement of the membrane assembly 11.

[0039] In some embodiments, the first port of the water branch pipe 13 is positioned to face left or right, and the water outlet A is also positioned to face left or right. The two ends of the first adapter 12 are respectively connected to the first port and the water outlet A of the corresponding water branch pipe 13 in the left-right direction. Furthermore, the water branch pipe 13 is a flexible tube. With this design, when removing the membrane assembly 11, the connection between the first port of the water branch pipe 13 and the first adapter 12 can be disconnected by pulling the water branch pipe 13 horizontally to the left or right. This disconnection does not require the membrane assembly 11 to move upward, thereby shortening the total distance the membrane assembly 11 must move upward during removal. This eliminates the need to reserve a large space above the membrane tank, contributing to the compactness of the entire water treatment equipment.

[0040] In some embodiments, such as Figure 4 As shown, the water production branch pipe 13 is a flexible pipe, one end of the first adapter 12 is inserted into the water production branch pipe 13 through the first port, and a detachable first clamp 19 is provided outside the water production branch pipe 13 to clamp the water production branch pipe 13 and the first adapter 12. With this design, under the clamping action of the first clamp 19, the flexible water production branch pipe 13 and the first adapter 12 are in close contact to achieve sealing, thereby avoiding leakage at the connection between the water production branch pipe 13 and the first adapter 12, and after removing the first clamp 19, the first adapter 12 can be easily removed from the water production branch pipe 13, thereby facilitating the disassembly of the membrane assembly 11. Specifically, in the illustrated embodiment, the two ends of the first clamp 19 are connected by threaded fasteners, and the first clamp 19 is tightened or loosened by screwing the threaded fasteners. Specifically, in the illustrated embodiment, as Figure 7 As shown, the outer circumferential surface of the portion of the first adapter 12 inserted into the water production branch pipe 13 is provided with a first cylindrical surface, a conical surface, and a second cylindrical surface in sequence. The small diameter end of the conical surface is close to the first cylindrical surface, and the large diameter end of the conical surface is close to the second cylindrical surface. The diameter of the large diameter end of the conical surface is larger than the diameter of the first cylindrical surface and the diameter of the second cylindrical surface. This can improve the connection stability and sealing between the water production branch pipe 13 and the first adapter 12.

[0041] In some embodiments, the other end of the first adapter 12 passes through the produced water outlet A and is inserted into the upper water collecting pipe 112, and a sealing ring is provided between the first adapter 12 and the upper water collecting pipe 112 to seal and prevent leakage at the connection between the first adapter 12 and the upper water collecting pipe 112. At the same time, the sealing ring also plays a friction-reducing role to prevent damage to the produced water outlet A when assembling the first adapter 12 and the upper water collecting pipe 112. Specifically, in the embodiment shown in the figure, Figure 6 As shown, the upper water collecting pipe 112 is provided with a cylindrical hole 112a, and one end of the cylindrical hole 112a is the water outlet A. Figure 7 As shown, the outer circumferential surface of the portion of the first adapter 12 inserted into the upper water collecting pipe 112 is a cylindrical surface adapted to the cylindrical hole 112a, and three sealing grooves for installing sealing rings are provided on the cylindrical surface.

[0042] In some embodiments, such as Figure 7 As shown, an intermediate section is provided between the portion of the first adapter 12 inserted into the upper water collecting pipe 112 and the portion inserted into the water production branch pipe 13. A first limiting surface B and a second limiting surface C are respectively provided at both ends of the intermediate section. The first limiting surface B abuts against one end surface of the upper water collecting pipe 112 to limit the insertion depth of the first adapter 12 into the upper water collecting pipe 112. The second limiting surface C abuts against one end surface of the water production branch pipe 13 to limit the insertion depth of the first adapter 12 into the water production branch pipe 13.

[0043] In some embodiments, such as Figure 5 As shown, the submerged membrane separator includes a second adapter 15. Each interface 14a of the main water pipe 14 is connected to a second adapter 15, and each second adapter 15 is detachably connected to the second port of a water branch pipe 13. This design facilitates the replacement of the water branch pipe 13. Specifically, in the illustrated embodiment, one end of the second adapter 15 extends through the second port of the water branch pipe 13 into the water branch pipe 13. A detachable second clamp 20 is provided on the outside of the water branch pipe 13 to clamp the water branch pipe 13 and the second adapter 15. This design ensures that the second clamp 20 tightly contacts the flexible water branch pipe 13 and the second adapter 15, preventing leakage at the connection between the water branch pipe 13 and the second adapter 15. After removing the second clamp 20, the second adapter 15 can be easily removed from the water branch pipe 13, thereby facilitating the replacement of the water branch pipe 13. Specifically, in the illustrated embodiment, the two ends of the second clamp 20 are connected by threaded fasteners, which are tightened or loosened by turning the threaded fasteners. The structure of the portion of the second adapter 15 inserted into the water production branch pipe 13 can be designed to be similar to the portion of the first adapter 12 inserted into the water production branch pipe 13 described above. The second adapter 15 and the water production main pipe 14 can be welded.

[0044] In some embodiments, such as Figure 2 and Figure 3As shown, each slot in the bracket 16 includes an upper slot 161 and a lower slot 162 aligned vertically. The upper slot 161 is located at the top of the bracket 16, while the lower slot 162 is located at the bottom. The bracket 16 includes a support beam 163, which is at least partially located at the bottom of the lower slot 162 to support the membrane assembly 11 within the slot. The upper slot 161 is lower than the upper header 112, so that it does not interfere with the connection between the water production branch pipe 13 and the upper header 112.

[0045] In some embodiments, the support 16 is a frame structure. For example, in the illustrated embodiment, the support includes four vertically extending support columns, and cross beams are connected between the upper and lower portions of the four columns. This type of support 16 has good integrity and can be hoisted using hoisting equipment.

[0046] In some embodiments, such as Figure 1 As shown, the submerged membrane separator includes an aeration assembly 18, which comprises a manifold 181 and an aeration line 182. Manifold 181 is fixed to the lower portion of bracket 16 and has a flow channel within it. Manifold 181 also has an air source interface 181a for connecting to an external air source. Aeration line 182 is located below membrane assembly 11 and communicates with the flow channel within manifold 181. Aeration lines 182 are provided with aeration holes.

[0047] In some embodiments, the spacing between adjacent membrane assemblies 11 is 40 mm to 100 mm, preferably 45 mm to 75 mm, and more preferably 50 mm to 70 mm. This ensures water treatment efficiency while preventing friction between adjacent membrane assemblies 11 during vertical movement.

[0048] In some embodiments, the width of the membrane assembly 11 is no greater than 1500 mm, preferably no greater than 1000 mm, and more preferably no greater than 850 mm. The height of the membrane assembly 11 is no greater than 2000 mm, and the length of the membrane element 111 is no greater than 2100 mm. The thickness of the membrane assembly 11 is no greater than 60 mm, preferably no greater than 50 mm, and more preferably no greater than 30 mm. This reduces the weight of a single-row membrane assembly 11, making it easier to manually move the membrane assembly 11 up and down.

[0049] In some embodiments, the slack of the membrane element 111 is no greater than 5%.

[0050] In some embodiments, the height of the upper water collecting pipe 112 of the membrane assembly 11 is not less than 60 mm, preferably not less than 100 mm, and more preferably not less than 120 mm. In this way, the water production can be guaranteed.

[0051] In some embodiments, the inner diameter of the flexible water production branch pipe 13 is 15 mm to 20 mm, and the wall thickness is 2 mm to 3 mm. This ensures that the water production branch pipe 13 is not easily damaged when the membrane assembly 11 is disassembled and the water production branch pipe 13 is bent.

[0052] In some embodiments, the main body of the flexible water production branch pipe 13 is made of polyvinyl chloride (PVC) and has a steel wire lining.

[0053] In some embodiments, the water production branch pipes 13 and the water production main pipe 14 on the left and right sides of the membrane module 11 are symmetrical.

[0054] The above embodiments can be freely combined without conflict.

[0055] The principles and implementation methods of the present application have been described above using specific examples. The description of the above embodiments is only intended to help understand the method and core concept of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, various improvements and modifications may be made to the present application, and such improvements and modifications also fall within the scope of protection of the present application.

Claims

1. A submerged membrane separator, characterized in that: The submerged membrane separator comprises a membrane assembly (11), a first adapter (12), a water production branch pipe (13) and a water production main pipe (14); a plurality of rows of the membrane assemblies (11) are arranged in sequence along a front-to-back direction; each row of the membrane assemblies (11) comprises a membrane element (111) and an upper water collection pipe (112) located above the membrane element (111); the upper water collection pipe (112) of each row of the membrane assemblies (11) is provided with a water production outlet (A); a plurality of interfaces (14a) are sequentially arranged at intervals in the length direction of the water production main pipe (14); a first adapter (12) is connected between each of the water production outlets (A) and a first port of each of the water production branch pipes (13); the first adapter (12) is detachably connected to at least one of the water production outlet (A) and the first port of the water production branch pipe (13); and the second port of each of the water production branch pipes (13) is respectively connected to one of the interfaces (14a).

2. The submerged membrane separator according to claim 1, characterized in that: The produced water main pipe (14) is arranged on the left or right side of the multiple-row membrane assembly (11), extends in the front-to-back direction, and is lower than the produced water outlet (A).

3. The submerged membrane separator according to claim 1, characterized in that: The first port of the water production branch pipe (13) and the water production outlet (A) are arranged to face left or right, and the two ends of the first adapter (12) are respectively plugged into the first port of the water production branch pipe (13) and the water production outlet (A) along the left and right directions, and the water production branch pipe (13) is a flexible pipe.

4. The submerged membrane separator according to claim 1, characterized in that: The water production branch pipe (13) is a flexible pipe, one end of the first adapter (12) passes through the first port and is inserted into the water production branch pipe (13), and a detachable first clamp (19) is provided outside the water production branch pipe (13) to clamp the water production branch pipe (13) and the first adapter (12).

5. The submerged membrane separator according to claim 1, characterized in that: One end of the first adapter (12) passes through the produced water outlet (A) and is inserted into the upper water collecting pipe (112), and a sealing ring is provided between the first adapter (12) and the upper water collecting pipe (112) for sealing.

6. The submerged membrane separator according to claim 1, characterized in that: The submerged membrane separator comprises a second adapter (15), each interface (14a) of the produced water main pipe (14) is respectively connected to one of the second adapters (15), and each of the second adapters (15) is respectively detachably connected to a second port of one of the produced water branch pipes (13).

7. The submerged membrane separator according to claim 6, characterized in that: The water production branch pipe (13) is a flexible pipe, one end of the second adapter (15) passes through the second port and is inserted into the water production branch pipe (13), and a detachable second clamp (20) is provided outside the water production branch pipe (13) to clamp the water production branch pipe (13) and the second adapter (15).

8. The submerged membrane separator according to any one of claims 1 to 7, characterized in that: The submerged membrane separator comprises a support (16) and a pressing member (17), wherein the support (16) is provided with a plurality of slots, wherein the plurality of slots are arranged in sequence along the front-to-back direction, wherein each row of the membrane assemblies (11) is respectively inserted into one of the slots, and the pressing member (17) is pressed against the top of the plurality of rows of membrane assemblies (11), and the pressing member (17) is detachably connected to the support (16) or to the side wall of the membrane pool where the submerged membrane separator is located, and each of the slots is provided with an upper notch, and after the pressing member (17) is removed, the membrane assembly (11) can move upward and leave the slot through the upper notch.

9. The submerged membrane separator according to claim 8, characterized in that: Each of the slots comprises an upper slot (161) and a lower slot (162) aligned in upper and lower directions; the upper slot (161) is arranged at the upper part of the support (16); the lower slot (162) is arranged at the lower part of the support (16); the support (16) comprises a support beam (163); the support beam (163) is at least partially located at the bottom side of the lower slot (162) to support the membrane assembly (11) in the slot; the upper slot (161) is lower than the upper water collecting pipe (112).

10. The submerged membrane separator according to claim 8, characterized in that: The submerged membrane separator comprises an aeration assembly (18), wherein the aeration assembly (18) comprises a collecting frame (181) and an aeration pipeline (182); the collecting frame (181) is fixed to the lower part of the bracket (16); a flow channel is provided inside the collecting frame (181); the collecting frame (181) is provided with an air source interface (181a) for connecting to an external air source; the aeration pipeline (182) is located below the membrane assembly (11); the aeration pipeline (182) is in communication with the internal flow channel of the collecting frame (181); and the aeration pipeline (182) is provided with aeration holes.

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