Immersed membrane separator

Abstract

The utility model provides an immersed membrane separator which comprises a membrane assembly and a supporting and limiting part, the supporting and limiting part comprises an upper module and a lower module, the upper module and the lower module are mutually independent, the upper module comprises an abutting piece which downwards abuts against the membrane assembly, the lower module comprises a supporting piece, and the supporting piece is arranged between the upper module and the lower module. The supporting piece is mounted below the membrane component and upwards supports the membrane component, in a use state, the upper module is connected to the side wall of a membrane pool where the immersed membrane separator is located, the pressing piece can be detached from the side wall of the membrane pool, and the membrane component can be freely inserted and pulled up and down after the pressing piece is detached. When the water treatment capacity is increased, a newly added membrane component can be inserted into the current idle slot or a membrane separator can be additionally arranged in the membrane pool, and the lower module of the additionally arranged membrane separator can be basically seamlessly spliced with the lower module of the original membrane separator in the membrane pool, so that the volume of the membrane pool is saved while the number of the membrane components is conveniently and quickly expanded.

Description

Technical Field

[0001] This application relates to the field of microfiltration or ultrafiltration membrane separation technology, and in particular to an immersion membrane separator. Background Technology

[0002] Submerged membrane separators are the core component of submerged membrane filtration (SMF) systems. Currently, most submerged membrane separators on the market adopt an integrated support and limiting structure. When the water treatment capacity increases and one or more submerged membrane separators need to be added to the membrane tank, the gap between the added submerged membrane separator and the original submerged membrane separator in the membrane tank is relatively large, resulting in wasted membrane tank volume. In addition, the process of adding submerged membrane separators requires hoisting equipment for overall hoisting, which makes the addition inconvenient. Furthermore, the number of membrane modules integrated inside the integrated support and limiting structure is fixed and cannot be expanded.

[0003] Therefore, how to conveniently and quickly expand the number of membrane modules while further saving the volume of the membrane tank is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] To solve the above-mentioned technical problems, this application provides a submerged membrane separator, which includes a membrane module and a support and limiting part. The support and limiting part includes an upper module and a lower module, which are independent of each other. The upper module includes a pressing member that presses down on the membrane module. The lower module includes a support member that is installed below the membrane module and supports the membrane module upward. In use, the upper module is connected to the side wall of the membrane tank where the submerged membrane separator is located.

[0005] In one embodiment of a submerged membrane separator, the support member has an internal flow channel and an air source interface for connecting to an external air source. The submerged membrane separator includes an aeration pipeline located below the membrane module. The aeration pipeline communicates with the internal flow channel of the support member and has aeration holes.

[0006] One embodiment of a submerged membrane separator includes multiple rows of membrane modules, a permeate branch pipe, a permeate main pipe, and plugs. Each row of membrane modules has a permeate outlet, and the permeate main pipe has multiple interfaces. Each permeate outlet is connected to a permeate branch pipe and one interface. The support limiting part has multiple rows of slots, and each row of membrane modules is inserted into one row of slots. The pressure member can be removed. After the pressure member is removed, the membrane module can be moved upward to pull the membrane module out of the slot. The submerged membrane separator has a non-full-load operating state and a full-load operating state. In the non-full-load operating state, some interfaces are blocked by the plugs, and some slots are not filled with membrane modules. In the full-load operating state, each interface is connected to a permeate branch pipe and a permeate outlet, and each row of slots contains one row of membrane modules.

[0007] In one embodiment of the submerged membrane separator, each row of slots includes an upper slot and a lower slot aligned vertically, the upper slot being located on the upper module and the lower slot being located on the lower module.

[0008] In one embodiment of a submerged membrane separator, the upper module includes an upper connector mounted on the left or right side of the membrane assembly. An upper slot is located on the side of the upper connector near the membrane assembly and has an upper opening. After the pressure member is removed, the membrane assembly can move upward and leave the slot from the upper opening.

[0009] In one embodiment of an immersion membrane separator, the lower module includes a lower connector and a lower support leg. The support member is a frame structure. The lower connector is installed inside the frame opening of the support member. The lower slot is disposed on the upper side of the lower connector. The lower connector supports the membrane assembly upward. The lower support leg is connected below the lower connector, supporting the lower connector and the support member.

[0010] In one embodiment of the submerged membrane separator, each of the product water outlets is connected to one of the first adapters, and each of the first adapters is detachably connected to the first port of one of the product water branch pipes.

[0011] In one embodiment of a submerged membrane separator, the permeate branch pipe is a flexible pipe, one end of the first adapter passes through the first port and is inserted into the permeate branch pipe, and a detachable first clamp is provided outside the permeate branch pipe to tighten the permeate branch pipe and the first adapter, one end of the first adapter passes through the permeate outlet and is inserted into the upper water collection pipe, and a sealing ring is provided between the first adapter and the upper water collection pipe for sealing.

[0012] In one embodiment of the submerged membrane separator, a second adapter is detachably connected to the second port of each of the product water branch pipes to connect to the corresponding interface via the second adapter.

[0013] In one embodiment of a submerged membrane separator, the permeate branch pipe is a flexible pipe, one end of the second adapter passes through the second port and is inserted into the permeate branch pipe, and a detachable second clamp is provided outside the permeate branch pipe to tighten the permeate branch pipe and the second adapter.

[0014] The submerged membrane separator provided in this application can meet the increased water treatment capacity by adding one or more submerged membrane separators in the membrane tank. Since the upper module is connected to the side wall of the membrane tank, there is no need to install a column between the upper and lower modules to support the upper module. Therefore, the upper and lower modules can be independent of each other. In this way, when adding a submerged membrane separator, the lower module can be installed on the bottom wall of the membrane tank first, then the membrane module can be installed, and then the upper module can be installed on the side wall of the membrane tank. This allows the lower module, membrane module, and upper module to be manually transported and installed one by one. Therefore, the position of the lower module can be flexibly adjusted so that the lower module of the added submerged membrane separator and the lower module of the original submerged membrane separator in the membrane tank are basically seamlessly spliced, thereby saving membrane tank volume. Moreover, since there is no need for overall hoisting, the addition process is convenient and quick.

[0015] In addition, the submerged membrane separator provided in this application can also adapt to different water treatment capacity requirements by expanding or reducing the number of membrane modules in the submerged membrane separator. For example, when the water treatment capacity increases, a new membrane module can be added to the currently empty slot of the submerged membrane separator, and then the plug sealing the currently empty interface can be removed to connect the product water outlet of the newly added membrane module to the currently empty interface. When the water treatment capacity decreases, some membrane modules can be pulled out of the slot of the submerged membrane separator, and then the currently empty interface can be sealed with a plug. Attached Figure Description

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

[0017] Figure 2 for Figure 1 A partial 3D view of the upper module;

[0018] Figure 3 This is a three-dimensional view of the pressure component of the upper module;

[0019] Figure 4 This is a 3D view of the upper connector of the upper module;

[0020] Figure 5 for Figure 1 A 3D view of the lower and middle modules and aeration piping;

[0021] Figure 6 This is a 3D view of the support components for the lower module;

[0022] Figure 7 This is a 3D view of the lower connector and lower support leg of the lower module;

[0023] Figure 8 This is a 3D diagram of the aeration pipeline.

[0024] Figure 9 for Figure 1 A close-up view of the connection point between the main water collection pipe and the product water branch pipe;

[0025] Figure 10 for Figure 1 A close-up view of the connection point between the product water branch pipe and the product water main pipe;

[0026] Figure 11 for Figure 1 A partial side view;

[0027] Figure 12 for Figure 11 A cross-sectional view of the first adapter component;

[0028] The annotations in the attached figures are explained as follows:

[0029] 11 Membrane module, 111 Membrane element, 112 Upper water collection pipe, A Permeate outlet, 113 Lower water collection pipe, 114 Connecting pipe, 12 First adapter, B First limiting surface, C Second limiting surface, 13 Permeate branch pipe, 14 Permeate main pipe, 14a Interface, 15 Second adapter, 16 Support limiting part, 161 Upper module, 161a Pressing part, 161b Upper connector, E Upper slot, 162 Lower module, 162a Support, D Air source interface, 162b Lower connector, F Lower slot, 162c Lower support leg, 17 Aeration pipeline, 18 First clamp, 19 Second clamp. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 1 As shown, the submerged membrane separator provided in this application includes a membrane module 11 and a support and limiting part 16. The support and limiting part 16 includes an upper module 161 and a lower module 162, which are independent of each other. In use, the upper module 161 is connected to the side wall of the membrane tank, and the lower module 162 is connected to the bottom wall of the membrane tank.

[0032] like Figures 3-5As shown, the upper module 161 includes a pressing member 161a, which is generally located above the membrane assembly 11 and presses downward against the membrane assembly 11. Figures 6-9 As shown, the lower module 162 includes a support member 162a, which is located approximately below the membrane assembly 11 and supports the membrane assembly 11 upwards.

[0033] When the water treatment capacity increases, the increased water treatment capacity can be met by adding one or more submerged membrane separators in the membrane tank.

[0034] In the past, when adding a membrane separator to the membrane tank, the membrane separator had to be hoisted as a whole using hoisting equipment. This did not allow for flexible adjustment of the membrane separator's position, resulting in a large gap between the added membrane separator and the original membrane separator in the membrane tank, wasting membrane tank volume, and making the addition process inconvenient.

[0035] The submerged membrane separator provided in this application allows for the following installation method when adding a submerged membrane separator to a membrane tank: first, the lower module 162 is installed on the bottom wall of the membrane tank, then the membrane module 11 is installed, and finally the upper module 161 is installed on the side wall of the membrane tank. This allows the lower module 162, membrane module 11, and upper module 161 to be manually transported and installed sequentially and individually. Therefore, the position of the lower module 162 can be flexibly adjusted so that the lower module 162 of the added submerged membrane separator and the lower module 162 of the original submerged membrane separator in the membrane tank are basically seamlessly connected, thereby saving membrane tank volume. Moreover, since the entire unit does not need to be hoisted, the installation process is convenient and quick.

[0036] like Figure 1 As shown, the submerged membrane separator provided in this application includes multiple rows of membrane modules, as well as permeate branch pipes 13, permeate main pipes 14, and plugs (not shown in the figure). The multiple rows of membrane modules 11 are arranged sequentially. In the description of this application, the arrangement direction of the multiple rows of membrane modules 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-to-right direction refers to the direction perpendicular to both the front-to-back direction and the up-to-down direction.

[0037] like Figure 2As shown, each row of membrane modules 11 is provided with a product water outlet A. In the illustrated embodiment, each row of membrane modules 11 includes a membrane element 111, an upper water collection pipe 112 located above the membrane element 111, a lower water collection pipe 113 located below the membrane element 111, and a connecting pipe 114 connecting the upper water collection pipe 112 and the lower water collection pipe 113. The upper water collection pipe 112 and the lower water collection pipe 113 extend in the left-right direction, and the connecting pipe 114 extends in the up-down direction. Each row of membrane modules 11 has a product water outlet A at each of the left and right ends of the upper water collection pipe 112. Alternatively, each row of membrane modules 11 may have only one product water outlet A at the upper water collection pipe 112. During operation, the submerged membrane separator is located inside the membrane tank, and the raw water to be treated is introduced into the membrane tank. Impurities in the raw water are trapped inside the membrane tank by the membrane element 111, while the permeate flows through the micropores of the membrane element 111 through the upper water collection pipe 112, the permeate branch pipe 13, and the permeate main pipe 14 to the permeate tank. It should be noted that this application does not limit the type of membrane module 11 or the type of membrane element 111. For example, common curtain membrane modules, bundle membrane modules, plate and frame membrane modules, and column membrane modules are all acceptable, as are common hollow fiber membrane elements, flat sheet membrane elements, and tubular membrane elements.

[0038] The permeate main pipe 14 is provided with multiple interfaces 14a, and each permeate outlet A is connected to a permeate branch pipe 13 and an interface 14a. In the illustrated embodiment, a permeate main pipe 14 is provided on each of the left and right sides of the multi-row membrane module 11, for a total of two permeate main pipes 14. The permeate main pipe 14 is lower than the permeate outlet A, preferably 200mm-400mm lower. The permeate main pipe 14 extends in the front-to-back direction, and multiple interfaces 14a are arranged sequentially at intervals along the front-to-back direction on each permeate main pipe 14. The permeate branch pipe 13 connected to the permeate outlet A at the left end is connected to the corresponding interface 14a on the permeate main pipe 14 on the left side, and the permeate branch pipe 13 connected to the permeate outlet A at the right end is connected to the corresponding interface 14a on the permeate main pipe 14 on the right side. The added submerged membrane separator's permeate main pipe 14 can be connected to the original submerged membrane separator's permeate main pipe 14 in the membrane tank, thus realizing the series connection of multiple submerged membrane separators.

[0039] The support limiting part 16 has multiple rows of slots, with each row of membrane modules 11 inserted into one of the slots. The pressure member 161a can be removed from the side wall of the membrane tank. After the pressure member 161a is removed, the membrane module 11 can be moved upward to pull it out of the slot, and additional membrane modules 11 can be moved downward to insert them into the slot. In other words, after the pressure member 161a is removed, the membrane module 11 can be freely inserted and removed. The submerged membrane separator has a non-full-load operating state and a full-load operating state. In the non-full-load operating state, some interfaces are blocked by plugs, and some slots are not filled with membrane modules. In the full-load operating state, each interface 14a is connected to a permeate branch pipe 13 and a permeate outlet A, and each row of slots contains one row of membrane modules 11.

[0040] Traditional membrane separators with integrated support and limiting structures have a fixed number of membrane modules that cannot be expanded.

[0041] The submerged membrane separator provided in this application allows the membrane modules 11 to be freely inserted and removed after the pressure member 161a is disassembled. Therefore, the number of membrane modules 11 in the submerged membrane separator can be expanded or reduced to adapt to different water treatment capacity requirements. For example, when the water treatment capacity increases, a new membrane module 11 can be added to the currently empty slot of the submerged membrane separator. Then, the plug sealing the currently empty interface is removed, and the product water outlet A of the newly added membrane module 11 is connected to the currently empty interface 14a. When the water treatment capacity decreases, some membrane modules 11 can be pulled out of the slot of the submerged membrane separator, and then the currently empty interface 14a is sealed with a plug.

[0042] In some embodiments, such as Figures 6-9 As shown, the support member 162a has an internal flow channel. The support member 162a has an air source interface D for connecting to an external air source. The submerged membrane separator includes an aeration pipe 17, which is located below the membrane module 11. The aeration pipe 17 communicates with the internal flow channel of the support member 162a, specifically by being threaded onto the support member 162a, allowing the aeration pipe 17 to be detached from the support member 162a. This design allows the support member 162a to serve as both a support structure for the membrane module 11 and a flow distribution structure, distributing the introduced external gas to each aeration pipe 17. It also serves as a support structure for the aeration pipes 17, providing multiple functions and reducing the weight of the lower module 162, making its installation easier and faster. The aeration pipe 17 has aeration holes. In the illustrated embodiment, the aeration pipe 17 is a groove structure with an open bottom, and the aeration holes are located on the side wall of the groove structure. This type of aeration pipe is less prone to clogging.

[0043] In some embodiments, when the support and limit part 16 includes an upper module 161 and a lower module 162, each row of slots includes upper slots E and lower slots F that are vertically aligned. The upper slots E are provided in the upper module 161, and the lower slots F are provided in the lower module 162. The upper slots E and the lower slots F limit the upper and lower parts of the membrane module 11 respectively, preventing the membrane module 11 from tilting and colliding with adjacent membrane modules 11, which may affect the water treatment quality.

[0044] In some embodiments, as Figures 3-5 shown, the upper module 161 includes an upper connecting piece 161b. The upper connecting piece 161b is installed on the left or right side of the membrane module 11, and the upper slots E are provided on the side of the upper connecting piece 161b close to the membrane module 11. Specifically, in the illustrated embodiment, an upper connecting piece 161b is provided on each of the left and right sides of the membrane module 11. The upper slots E are provided on the right side of the upper connecting piece 161b on the left side, and the upper slots are provided on the left side of the upper connecting piece 161b on the right side. Specifically, in the illustrated embodiment, the upper slots E are lower than the water production outlet A of the water production branch pipe 13, and it is preferably 50 mm - 100 mm lower than the water production outlet A, so as not to interfere with the connection between the water production branch pipe 13 and the upper water collecting pipe 112.

[0045] In some embodiments, as Figures 6-9 shown, the lower module 162 includes a lower connecting piece 162b and lower legs 162c. The support 162a has a frame structure. The lower connecting piece 162b is installed inside the frame opening of the support 162a, and the lower slots F are provided on the upper side of the lower connecting piece 162b. The lower connecting piece 162b and the support 162a support the membrane module 11 upwards together. The lower legs 162c are connected below the lower connecting piece 162b to support the lower connecting piece 162b and the support 162a. In the illustrated embodiment, the support 162a has a "day" - shaped frame structure, and its four frame edges and the middle cross - beam all support the membrane module 11 upwards. Two lower connecting pieces 162b are provided on each of the opposite sides of the support 162a, and two lower legs 162c are provided at each of the opposite ends of each lower connecting piece 162b. The four lower legs 162c are approximately located at the four corner positions of the "day" - shaped frame.

[0046] In some embodiments, as Figure 10As shown, each permeate outlet A is connected to a first adapter 12, and each first adapter 12 is detachably connected to the first port of a permeate branch pipe 13. The membrane module 11 needs to be disassembled periodically for cleaning, maintenance, and other operations. When disassembling the membrane module 11, since each permeate outlet A is connected to a first adapter 12, and each first adapter 12 is detachably connected to the first port of a permeate branch pipe 13, the connection between the membrane module 11 and the permeate branch pipe 13 can be broken by separating the first adapter 12 from the first port of the permeate branch pipe 13. Similarly, when assembling the membrane module 11, the connection can be restored by connecting the first adapter 12 to the first port of the permeate branch pipe 13. The separation and connection process of the first adapter 12 and the first port of the permeate branch pipe 13 does not cause wear to the permeate outlet A of the membrane module 11, thus reducing damage to the membrane module 11 during disassembly and assembly. Furthermore, once the connection between the membrane module 11 and the permeate branch pipe 13 is disconnected, the membrane module 11 can be disassembled separately without disassembling the permeate branch pipe 13 together. If the permeate branch pipe 13 is disassembled together, it will increase the weight of disassembly and assembly. In addition, sometimes it is necessary to disassemble the disassembled permeate branch pipe 13 and the membrane module 11 a second time, which will increase the labor intensity of the disassembly and assembly workers. Therefore, this design also reduces the labor intensity of the disassembly and assembly workers.

[0047] When disassembling membrane module 11, first remove the pressure member 17 and disconnect the membrane module 11 from the permeate branch pipe 13. Then move the membrane module 11 upward so that it leaves the slot from the upper groove. When assembling membrane module 11, first move the membrane module 11 downward so that it is inserted into the slot from the upper groove. Then reassemble the pressure member 17 and restore the connection between the membrane module 11 and the permeate branch pipe 13. The disassembly and assembly of membrane module 11 does not require the use of hoisting equipment and can be completed manually.

[0048] In some embodiments, the first port of the permeate branch pipe 13 is positioned to the left or right, and the permeate outlet A is also positioned to the left or right. The two ends of the first adapter 12 are respectively inserted into the first port of the corresponding permeate branch pipe 13 and the permeate outlet A along the left-right direction. Furthermore, the permeate branch pipe 13 is a flexible pipe. With this design, when disassembling the membrane module 11, the connection between the first port of the permeate branch pipe 13 and the first adapter 12 can be disconnected by pulling the permeate branch pipe 13 horizontally to the left or right. Thus, disconnecting the first port of the permeate branch pipe 13 from the first adapter 12 does not require the membrane module 11 to move upwards, thereby shortening the total upward distance the membrane module 11 needs to move during disassembly. This eliminates the need to reserve a large space above the membrane tank, contributing to the compactness of the entire water treatment equipment.

[0049] In some embodiments, combined with Figure 2 and Figure 10 As shown, the permeate branch pipe 13 is a flexible pipe. One end of the first adapter 12 passes through the first port and is inserted into the permeate branch pipe 13. A detachable first clamp 18 is installed outside the permeate branch pipe 13 to tighten the permeate branch pipe 13 and the first adapter 12. This design ensures that the flexible permeate branch pipe 13 and the first adapter 12 are tightly sealed under the clamping action of the first clamp 18, preventing leakage at the connection between the permeate branch pipe 13 and the first adapter 12. Furthermore, after removing the first clamp 18, the first adapter 12 can be easily removed from the permeate branch pipe 13, facilitating the disassembly of the membrane module 11. Specifically, in the illustrated embodiment, the two ends of the first clamp 18 are connected by threaded fasteners, and the first clamp 18 is tightened or loosened by screwing on the threaded fasteners. Specifically, in the illustrated embodiment, as... Figure 12 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 also larger than the diameter of the second cylindrical surface. This can improve the connection stability and sealing of the water production branch pipe 13 and the first adapter 12.

[0050] In some embodiments, the other end of the first adapter 12 passes through the product water outlet A and is inserted into the upper water collection pipe 112. A sealing ring is provided between the first adapter 12 and the upper water collection pipe 112 for sealing, preventing leakage at the connection between the first adapter 12 and the upper water collection pipe 112. The sealing ring also serves to reduce friction, preventing damage to the product water outlet A during assembly of the first adapter 12 and the upper water collection pipe 112. Specifically, in the illustrated embodiment, as shown... Figure 2 As shown, the upper water collection pipe 112 is provided with a cylindrical hole 112a, and one end of the cylindrical hole 112a is the water outlet A, as shown. Figure 12 As shown, the outer circumferential surface of the portion of the first adapter 12 inserted into the upper water collection pipe 112 is a cylindrical surface adapted to the cylindrical hole 112a, and the cylindrical surface is provided with three sealing grooves for installing sealing rings.

[0051] In some embodiments, such as Figure 12 As shown, an intermediate section is provided between the portion of the first adapter 12 inserted into the upper water collection pipe 112 and the portion inserted into the water production branch pipe 13. The two ends of the intermediate section are respectively provided with a first limiting surface B and a second limiting surface C. The first limiting surface B abuts against one end face of the upper water collection pipe 112 to limit the depth of the first adapter 12 inserted into the upper water collection pipe 112. The second limiting surface C abuts against one end face of the water production branch pipe 13 to limit the depth of the first adapter 12 inserted into the water production branch pipe 13.

[0052] In some embodiments, such as Figure 11As shown, a second adapter 15 is detachably connected to the second port of each water production branch pipe 13, and the second adapter 15 is connected to the corresponding interface 14a. This design facilitates the replacement of the water production branch pipe 13. Specifically, in the illustrated embodiment, one end of the second adapter 15 passes through the second port of the water production branch pipe 13 and extends into the water production branch pipe 13. A detachable second clamp 19 is provided outside the water production branch pipe 13 to tighten the water production branch pipe 13 and the second adapter 15. With this design, under the tightening action of the second clamp 19, the flexible water production branch pipe 13 and the second adapter 15 are in close contact to achieve a seal, preventing leakage at the connection between the water production branch pipe 13 and the second adapter 15. Furthermore, after removing the second clamp 19, the second adapter 15 can be easily removed from the water production branch pipe 13, thus facilitating the replacement of the water production branch pipe 13. Specifically, in the illustrated embodiment, the two ends of the second clamp 19 are connected by threaded fasteners, and the second clamp 19 is tightened or loosened by screwing the threaded fasteners. The structure of the portion of the second adapter 15 inserted into the product water branch pipe 13 can be designed to be the same as the portion of the first adapter 12 inserted into the product water branch pipe 13. The second adapter 15 can be welded to the product water main pipe 14.

[0053] In some embodiments, the spacing between adjacent membrane modules 11 is 50mm to 100mm. This ensures membrane separation performance while preventing friction between the membrane module 11 and adjacent membrane modules 11 during vertical movement.

[0054] In some embodiments, the vertical height of the membrane module 11 is no greater than 2000 mm. The horizontal width of the membrane module 11 is no greater than 1500 mm, more preferably no greater than 850 mm. In this way, the weight of a single row of membrane modules 11 will not be too great, making it convenient for manual up-and-down movement of the membrane modules 11.

[0055] In some embodiments, the front-to-back width of the slot is 5mm-10mm larger than the front-to-back thickness of the membrane assembly 11, which serves as a limit while ensuring that the membrane assembly 11 can be easily inserted into the slot.

[0056] In some embodiments, the permeate branch pipes 13 and the permeate main pipe 14 on the left and right sides of the membrane module 11 are symmetrical.

[0057] The above embodiments can be freely combined without conflict.

[0058] The above examples illustrate the principles and implementation methods of this application. The descriptions of the embodiments are merely for the purpose of helping to understand the methods and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. An immersed membrane separator, characterized by, The submerged membrane separator comprises a membrane assembly (11) and a support limiting part (16), the support limiting part (16) comprises an upper module (161) and a lower module (162), the upper module (161) and the lower module (162) are independent of each other, the upper module (161) comprises a pressing piece (161a) which presses downward on the membrane assembly (11), the lower module (162) comprises a support piece (162a) which is installed below the membrane assembly (11) and supports the membrane assembly (11) upward, in use, the upper module (161) is connected to the side wall of the membrane tank where the submerged membrane separator is located.

2. The submerged membrane separator of claim 1, wherein, The support piece (162a) is internally provided with a flow channel, the support piece (162a) is provided with an air source interface (D) for connecting an external air source, the submerged membrane separator comprises an aeration pipeline (17) which is located below the membrane assembly (11) and is in communication with the internal flow channel of the support piece (162a), and the aeration pipeline (17) is provided with an aeration hole.

3. The submerged membrane separator of claim 1, wherein, The submerged membrane separator comprises a plurality of rows of membrane assemblies (11) and further comprises a water production branch pipe (13), a water production main pipe (14) and a plug (21), each row of membrane assemblies (11) is provided with a water production outlet (A), the water production main pipe (14) is provided with a plurality of interfaces (14a), each water production outlet (A) is in communication with one water production branch pipe (13) and one interface (14a) respectively, the support limiting part (16) is provided with a plurality of rows of insertion slots, each row of membrane assemblies (11) is inserted in one row of insertion slots respectively, the pressing piece (161a) can be detached, after the pressing piece (161a) is detached, the membrane assembly (11) can be moved upward to be pulled out of the insertion slot, the submerged membrane separator has a non-full load use state and a full load use state, in the non-full load use state, part of the interfaces (14a) are plugged by the plugs (21) and part of the insertion slots are not inserted with the membrane assemblies (11), in the full load use state, each interface (14a) is in communication with one water production branch pipe (13) and one water production outlet (A) respectively, and each row of insertion slots is inserted with one row of membrane assemblies (11).

4. The submerged membrane separator of claim 3, wherein, Each row of insertion slots comprises an upper insertion slot (E) and a lower insertion slot (F) which are aligned vertically, the upper insertion slot (E) is arranged in the upper module (161), and the lower insertion slot (F) is arranged in the lower module (162).

5. The submerged membrane separator of claim 4, wherein, The upper module (161) comprises an upper connecting piece (161b) which is installed on the left side or the right side of the membrane assembly (11), and the upper insertion slot (E) is arranged on the side of the upper connecting piece (161b) which is close to the membrane assembly (11).

6. The submerged membrane separator of claim 4, wherein, The lower module (162) comprises a lower connecting piece (162b) and a lower leg (162c), the support piece (162a) is a frame structure, the lower connecting piece (162b) is installed in the frame opening of the support piece (162a), the lower slot (F) is arranged on the upper side of the lower connecting piece (162b), the lower connecting piece (162b) supports the membrane assembly (11) upward, and the lower leg (162c) is connected below the lower connecting piece (162b) to support the lower connecting piece (162b) and the support piece (162a).

7. The submerged membrane separator according to any one of claims 3-6, wherein, Each of the water production outlets (A) is connected with a first adapter (12), and each of the first adapters (12) is detachably connected with a first port of one of the water production branch pipes (13).

8. The submerged membrane separator of claim 7, wherein, 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 (18) is arranged outside the water production branch pipe (13) to clamp the water production branch pipe (13) and the first adapter (12), one end of the first adapter (12) is inserted into the upper collecting pipe (112) through the water production outlet (A), and a sealing ring is arranged between the first adapter (12) and the upper collecting pipe (112) to seal.

9. The submerged membrane separator of claim 7, wherein, The second port of each of the water production branch pipes (13) is detachably connected with a second adapter (15), so as to be connected with the corresponding interface (14a) through the second adapter (15).

10. The submerged membrane separator of claim 9, wherein, The water production branch pipe (13) is a flexible pipe, one end of the second adapter (15) is inserted into the water production branch pipe (13) through the second port, and a detachable second clamp (19) is arranged outside the water production branch pipe (13) to clamp the water production branch pipe (13) and the second adapter (15).

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