Large-volume ultrafiltration membrane assembly with external pressure type structure

Abstract

The utility model relates to the technical field of ultrafiltration membrane assemblies, in particular to a large-volume ultrafiltration membrane assembly of an external pressure type structure. The device comprises a central distribution pipe, at least two partition plates and an ultrafiltration membrane wire group, one end of the central distribution pipe is provided with a water inlet side, the other end of the central distribution pipe is provided with a closed side, a plurality of first water distribution holes are distributed in the pipe wall, the partition plates are fixedly connected to the pipe wall of the central distribution pipe, and the extension direction of the partition plates is consistent with the length direction of the central distribution pipe; the partition plates are circumferentially distributed around the central distribution pipe at equal angles, a plurality of second water distribution holes are distributed in the partition plates, each partition plate is divided into a water inlet high-flow area, a central area and a water outlet high-flow area according to the density of the second water distribution holes, and a membrane wire mounting cavity is formed between every two adjacent partition plates; one side, far away from the central distribution pipe, of the membrane wire mounting cavity is blocked, so that water flow flows along the extension direction of the partition plate, and the ultrafiltration membrane wire group is mounted in the membrane wire mounting cavity. Water flow distribution is optimized by improving water exchange among the membrane wire groups, so that the filtering efficiency is improved, the cross-flow anti-pollution degree is increased, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ultrafiltration membrane assemblies, in particular to an external pressure type large-volume ultrafiltration membrane assembly. BACKGROUND

[0002] Ultrafiltration membrane assemblies are widely used in the field of water treatment due to their good backwashing effect and the advantage of being suitable for use in high-turbidity wastewater treatment. In some large treatment capacity scenarios, large ultrafiltration membrane assemblies with high treatment capacity and high efficiency are often used.

[0003] In the related art, the patent technology with the announcement number CN107308820B discloses an ultrafiltration membrane assembly. In the technology, the filtration assembly comprises a module support composed of a central pipe and equiangularly distributed partition plates, and a fan-shaped structure filter core inserted in the interspace between the partition plates, the filter core being filled with hollow fiber ultrafiltration membrane filaments for realizing the filtration function.

[0004] However, in the technology, the filter cores are separately arranged between the partition plates of the module support, and the liquid flows out from the outer arc surface of the filter cores after passing through the filter cores. If the amount of liquid passing through different filter cores is different, the filtration effect of different filter cores will be uneven, and the cross-flow anti-pollution degree will be poor, which affects the overall filtration efficiency and the plugging rate. In addition, some filter cores may be prematurely worn out due to overuse, reducing the service life of the assembly. Content of the utility model

[0005] In order to improve the filtration efficiency and service life of the ultrafiltration membrane assembly, the application provides an external pressure type large-volume ultrafiltration membrane assembly.

[0006] An external pressure type large-volume ultrafiltration membrane assembly comprises:

[0007] A central distribution pipe, one end of the central distribution pipe being provided with a water inlet side, the other end being provided with a closed side, and a plurality of first water distribution holes being distributed on the wall of the central distribution pipe and penetrating the wall of the central distribution pipe;

[0008] Partition plates, the partition plates being fixedly connected to the wall of the central distribution pipe and being at least two, the extension direction of the partition plates being consistent with the length direction of the central distribution pipe, the partition plates being equiangularly distributed around the central distribution pipe, a plurality of second water distribution holes being distributed on the partition plates and penetrating the partition plates, each of the partition plates being divided into a high-flow water inlet area, a central area and a high-flow water outlet area according to the density of the second water distribution holes, and a membrane filament mounting cavity being formed between adjacent partition plates and being closed on the side away from the central distribution pipe so that the water flows along the extension direction of the partition plates;

[0009] An ultrafiltration membrane filament group, the ultrafiltration membrane filament group being mounted in the membrane filament mounting cavity.

[0010] By adopting the technical scheme, the design of the center distribution pipe enables the water to be evenly distributed on each membrane filament group separated by the partition plate, improving the anti-pollution ability of the membrane module; the design of the partition plate divides the membrane filaments into multiple areas, ensuring that each area can obtain sufficient water flow impact, further enhancing the overall cross-flow anti-pollution effect of the membrane module; at the same time, the design of the second water distribution holes on the partition plate enables good water exchange between the membrane filament groups, avoiding different filtration effects caused by different liquid processing amounts of different membrane filament groups, greatly improving the filtration efficiency; the design of the density partition can better adapt to the water flow demand of different areas, improving the filtration efficiency and reducing membrane filament pollution.

[0011] Preferably, the distribution of the second water distribution holes in the high water flow area and the high water flow area is denser than the distribution of the second water distribution holes in the center area.

[0012] By adopting the technical scheme, the high water flow area enables the water to be quickly dispersed to all membrane filament parts from the middle distribution pipe, fully contacting all membrane filaments, the center area prevents the dispersion of a large amount of water flow from the middle, so that the membrane filaments close to the water inlet side cannot contact enough water flow, and the high water flow area can effectively promote the rapid discharge of concentrated water and impurities, avoiding the accumulation of pollutants inside the membrane body, prolonging the service life of the membrane module.

[0013] Preferably, it further comprises an ultrafiltration cylinder body for enclosing the membrane filament mounting cavity, the ultrafiltration cylinder body is provided with a first adhesive on the water inlet side of the center distribution pipe, the first adhesive is bonded with the inner wall of the ultrafiltration cylinder body, one end of the ultrafiltration membrane filament group, and the outer wall of the center distribution pipe, the ultrafiltration cylinder body is provided with a second adhesive at the other end, and the second adhesive is bonded with the inner wall of the ultrafiltration cylinder body and the other end of the ultrafiltration membrane filament group.

[0014] By adopting the technical scheme, the ultrafiltration cylinder body effectively encloses the membrane filament mounting cavity, ensuring the stability of the membrane filaments during operation, avoiding the risk of leakage, and improving the overall sealing performance and reliability of the module. At the same time, by providing the first adhesive and the second adhesive at both ends of the ultrafiltration cylinder body, not only the connection strength between the ultrafiltration cylinder body and the center distribution pipe is strengthened, but also the fixation of both ends of the membrane filaments is ensured, further improving the service life and filtration performance of the module.

[0015] Preferably, it further comprises a water inlet side head cover and a water outlet side head cover, the water inlet side head cover is bonded with the first adhesive, the water outlet side head cover is bonded with the second adhesive, the water inlet side can be connected with the outside through the first adhesive and the water inlet side head cover, and the membrane filament mounting cavity can be connected with the outside through the second adhesive and the water outlet side head cover.

[0016] By adopting the technical scheme, the water inlet side end cover is bonded with the first glue body, the water outlet side end cover is bonded with the second glue body, the sealing property of the membrane filament installation cavity is ensured, external pollutants are prevented from entering the inside of the membrane assembly, the cleanliness and filtering effect of the membrane assembly are improved, meanwhile, the water inlet side can be communicated with the outside through the first glue body and the water inlet side end cover, so that the raw liquid can smoothly enter the inside of the membrane assembly, the uniformity and stability of water inlet are ensured, the membrane filament installation cavity can be communicated with the outside through the second glue body and the water outlet side end cover, so that the filtered ultrafiltrate can be smoothly discharged from the inside of the membrane assembly, and the operation efficiency and reliability of the whole system are improved.

[0017] Preferably, the first glue body is formed with a water inlet hole at the center during glue injection, the center distribution pipe is fixedly penetrated into the water inlet hole at one end of the water inlet side, and the water inlet side end cover is provided with a water inlet port communicated with the water inlet side.

[0018] By adopting the technical scheme, the center distribution pipe is fixedly penetrated into the water inlet hole formed by glue injection at one end of the water inlet side, the uniform distribution and stable introduction of water inlet are ensured, and the overall filtering performance and service life of the membrane assembly are effectively improved.

[0019] Preferably, the closed side is provided with an outlet end plug, one end of the outlet end plug away from the center distribution pipe is fixedly connected with the water outlet side end cover after penetrating through the second glue body, the outlet end plug is provided with a backwater hole penetrating through the pipe wall of the outlet end plug, the outlet end plug is provided with a concentrated water cavity, the backwater hole and the concentrated water cavity are used for receiving concentrated liquid not passing through the ultrafiltration membrane filament group, the water outlet side end cover is provided with a concentrated water port communicated with the concentrated water cavity, the second glue body is provided with a water production hole at the edge position of the cross section of the ultrafiltration cylinder body, and the water outlet side end cover is provided with a water production port communicated with the water production hole.

[0020] By adopting the technical scheme, the concentrated liquid not passing through the ultrafiltration membrane filament group can be effectively collected and recovered through the concentrated water cavity and the backwater hole, the filtered ultrafiltrate can be smoothly discharged through the water production hole, the separation efficiency and stability of the membrane assembly are improved, meanwhile, the second glue body is provided with the water production hole at the edge position of the cross section of the ultrafiltration cylinder body, and the water outlet side end cover is provided with the water production port communicated with the water production hole, so that the filtered ultrafiltrate can be smoothly discharged.

[0021] Preferably, the first inner ring and the second inner ring are further included, the first inner ring is provided between the water inlet side end cover and the ultrafiltration cylinder body, the first inner ring is provided in the first inner ring groove in an interference fit, the second inner ring is provided between the water outlet side end cover and the ultrafiltration cylinder body, and the second inner ring is provided in the second inner ring groove in an interference fit.

[0022] By adopting the technical scheme, the first inner ring and the second inner ring are arranged to effectively enhance the sealing performance and stability between the head cover and the ultrafiltration cylinder, avoid leakage or loosening during long-time operation, and improve the reliability and service life of the entire ultrafiltration membrane assembly.

[0023] Preferably, the first inner ring is provided with a first pulling block, and the second inner ring is provided with a second pulling block, and the first pulling block and the second pulling block are used to pull out the inner ring.

[0024] By adopting the technical scheme, the inner ring is pulled out through the first pulling block and the second pulling block to open the head cover, the ultrafiltration membrane assembly can be conveniently and quickly disassembled and maintained without affecting the sealing performance and stability of the ultrafiltration membrane assembly, and the maintenance convenience of the equipment is improved.

[0025] Preferably, the side wall of the ultrafiltration cylinder is provided with a first glue injection port communicating with the first glue and a second glue injection port communicating with the second glue, the first glue injection port is detachably connected with a first plug, and the second glue injection port is detachably connected with a second plug.

[0026] By adopting the technical scheme, the glue injection port is arranged on the side wall of the ultrafiltration cylinder, and the plug is detachably connected at the glue injection port, which not only facilitates the injection of glue into the ultrafiltration cylinder during manufacturing to ensure the sealing performance between the ultrafiltration membrane wire group and the ultrafiltration cylinder, but also effectively seals the glue injection port through the plug after the glue injection is completed to avoid glue leakage, thereby improving the overall stability and reliability of the ultrafiltration membrane assembly.

[0027] Preferably, the side edge of the partition plate is provided with a protrusion, the outer wall of the central distribution pipe is provided with a slot, and the protrusion is inserted into the slot.

[0028] By adopting the technical scheme, the side edge of the partition plate is provided with a protrusion, the outer wall of the central distribution pipe is provided with a slot, and the protrusion is inserted into the slot, which can effectively fix the partition plate to ensure the stability and reliability of the partition plate on the central distribution pipe and prevent the partition plate from being displaced or falling off under the impact of water flow.

[0029] In summary, the present application has at least one of the following beneficial technical effects:

[0030] 1. By arranging the partition plate with water distribution holes, the ultrafiltration membrane wire group is divided into multiple small membrane wire groups, the water distribution holes on the partition plate can ensure sufficient water exchange between the membrane wire groups, the filtration effect and cross-flow anti-fouling degree of each membrane wire group are uniform, and the overall filtration efficiency and service life of the ultrafiltration membrane assembly are improved.

[0031] 2. The distribution of different water distribution hole densities in different areas of the partition plate realizes rapid dispersion of water flow at the water inlet, prevents short flow in the center area, and rapid discharge of concentrated water. Through fine control of the distribution and speed of water flow, the filtration process is optimized, the filtration efficiency is improved, and the service life of the membrane module is greatly improved;

[0032] 3. The ultrafiltration cylinder body is sealed by end covers and inner rings at both ends, and pull blocks are arranged, so that the ultrafiltration membrane module can be easily disassembled for cleaning or replacement. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a longitudinal section schematic diagram of the overall structure of the application;

[0034] Figure 2 is a transverse section schematic diagram of the overall structure of the application;

[0035] Figure 3 is Figure 1 is a local enlarged schematic diagram of part A of

[0036] In the figure, 1 is a center distribution pipe; 11 is an inlet side; 12 is a closed side; 13 is a first water distribution hole; 14 is a slot; 2 is a partition plate; 21 is an inlet high flow area; 22 is a center area; 23 is an outlet high flow area; 24 is a second water distribution hole; 25 is a protrusion; 3 is a membrane filament installation cavity; 4 is an ultrafiltration membrane filament group; 5 is an ultrafiltration cylinder body; 51 is a first glue body; 511 is an inlet hole; 512 is a first glue injection port; 513 is a first plug; 52 is a second glue body; 521 is a water production hole; 522 is a second glue injection port; 523 is a second plug; 61 is an inlet side end cover; 611 is an inlet; 62 is an outlet side end cover; 621 is a concentrated water outlet; 622 is a water production outlet; 7 is an outlet end plug; 71 is a backwater hole; 72 is a concentrated water cavity; 81 is a first inner ring; 811 is a first pull block; 82 is a second inner ring; 821 is a second pull block; 91 is a first inner ring groove; 92 is a second inner ring groove. DETAILED DESCRIPTION

[0037] The following will be described in detail in combination with the accompanying Figures 1-3 Further description will be made to the application.

[0038] Reference will be made to Figure 1 and Figure 2The embodiment of the application provides a large-volume ultrafiltration membrane module of an external pressure type structure, which comprises a central distribution pipe 1, a baffle plate 2, an ultrafiltration membrane wire group 4 and an ultrafiltration cylinder body 5. One end of the central distribution pipe 1 is provided with a water inlet side 11, and the other end is provided with a closed side 12. A plurality of first water distribution holes 13 penetrating the wall of the central distribution pipe 1 are distributed on the wall of the central distribution pipe 1. The baffle plate 2 is provided with at least two baffle plates and is fixedly connected to the wall of the central distribution pipe 1. The extension direction of the baffle plate 2 is consistent with the length direction of the central distribution pipe 1. The baffle plate 2 is distributed at a constant angle around the central distribution pipe 1. A plurality of second water distribution holes 24 penetrating the baffle plate 2 are distributed on the baffle plate 2. Each baffle plate 2 is divided into a water inlet high-flow area 21, a central area 22 and a water outlet high-flow area 23 according to the density of the second water distribution holes 24. The membrane wire installation cavities 3 are formed between adjacent baffle plates 2. The side of the membrane wire installation cavity 3 far away from the central distribution pipe 1 is blocked so that the water flows along the extension direction of the baffle plate 2. The ultrafiltration membrane wire group 4 is installed in the membrane wire installation cavity 3. The ultrafiltration cylinder body 5 is used for closing the membrane wire installation cavity 3. The ultrafiltration cylinder body 5 is provided with a first colloid 51 at the water inlet side 11 of the central distribution pipe 1 and a second colloid 52 at the other end.

[0039] Specifically, the water inlet side 11 is designed as an open port for receiving external water to be filtered into the central distribution pipe 1,

[0040] Specifically, the wall of the water inlet side 11 and the wall of the closed side 12 are both non-porous walls.

[0041] In the embodiment, the baffle plate 2 is in three pieces, and the ultrafiltration membrane wire group 4 is divided into three parts. In other embodiments, the number of baffle plates 2 can be increased or decreased according to the size of the water treatment capacity. The number of baffle plates 2 is at least two.

[0042] Specifically, the distribution of the second water distribution holes 24 at the water inlet high-flow area 21 and the water outlet high-flow area 23 is more dense than the distribution of the second water distribution holes 24 at the central area 22. In the embodiment, the density of the second water distribution holes 24 at the water inlet high-flow area 21 and the water outlet high-flow area 23 of the baffle plate 2 can be 1.5 to 4 times that of the central area 22. The specific relative density is set according to the actual application.

[0043] In the embodiment, the baffle plate 2 is in the shape of a rectangular flat plate. In other embodiments, the baffle plate 2 can also be in the shape of a corrugated shape to increase the turbulent effect of the water flow.

[0044] Specifically, the pore size of the first water distribution hole 13 is less than or equal to the pore size of the second water distribution hole 24, so as to prevent the rate of the water to be filtered flowing to the ultrafiltration membrane wire group 4 from being faster than the rate of water exchange between the membrane wire groups, thereby causing the water to be filtered to not be sufficient for water exchange between the membrane wire groups, and reducing the filtration effect of the ultrafiltration membrane module.

[0045] In this embodiment, the center distribution pipe 1 is provided with slots 14, and the partition plate 2 is provided with protrusions 25. The number of slots 14 and protrusions 25 is four. The partition plate 2 and the center distribution pipe 1 are clamped through the protrusions 25 and the slots 14, and then the clamped part is welded to complete the fixed connection of the partition plate 2 on the center distribution pipe 1. In other embodiments, the number of slots 14 and protrusions 25 is determined according to the actual water treatment capacity and structure. The number of slots 14 and protrusions 25 is at least two while ensuring stable connection. The connection mode of the partition plate 2 and the center distribution pipe 1 can also be flange connection or threaded connection.

[0046] Specifically, the membrane filaments in the ultrafiltration membrane filament group 4 are arranged along the length direction of the cylinder. The ultrafiltration membrane filaments are arranged in layers around the center distribution pipe 1 and towards the wall of the ultrafiltration cylinder 5, so that the water to be filtered is filtered layer by layer by the ultrafiltration membrane filament group 4.

[0047] In this embodiment, the ultrafiltration membrane filament group 4 adopts hollow fiber ultrafiltration membrane filaments. In other embodiments, ceramic membranes or nanofiber membranes can also be used.

[0048] In this embodiment, the first glue 51 and the second glue 52 both adopt UPVC glue. In other embodiments, the first glue 51 and the second glue 52 can also adopt epoxy resin glue.

[0049] Specifically, the ultrafiltration cylinder 5 is provided with a first glue injection port 512 communicating with the first glue 51 and a second glue injection port 522 communicating with the second glue 52. The first glue 51 and the second glue 52 are injected through the first glue injection port 512 and the second glue injection port 522. In this embodiment, the first glue injection port 512 is threadedly connected with a first plug 513, and the second glue injection port 522 is threadedly connected with a second plug 523. The shapes of the first plug 513 and the second plug 523 correspond to the shapes of the glue injection ports, and the thicknesses of the first plug 513 and the second plug 523 are the same as the wall thickness of the ultrafiltration cylinder 5. Vertical grooves are formed on the outer surfaces of the first plug 513 and the second plug 523 for easy packaging. In other embodiments, the first plug 513 and the second plug 523 can be plugged into the first glue injection port 512 and the second glue injection port 522.

[0050] Specifically, the first glue 51 is bonded to the inner wall of the ultrafiltration cylinder 5, one end of the ultrafiltration membrane filament group 4, and the outer wall of the water inlet side 11. The second glue 52 is bonded to the inner wall of the ultrafiltration cylinder 5 and the other end of the ultrafiltration membrane filament group 4. The second glue 52 is cut at the edge position of the cross section of the ultrafiltration cylinder 5 to form a water outlet hole 521.

[0051] In this embodiment, sealing sleeves are clamped on the outer sides of both ends of the ultrafiltration cylinder 5 to stabilize the structure. The sealing sleeves are made of titanium alloy. In other embodiments, the connection mode of the sealing sleeves and the ultrafiltration cylinder 5 can also be threaded connection, and the material of the sealing sleeves can also be rubber or plastic material.

[0052] In addition, the application also includes the water outlet end plug 7.

[0053] Referring to Figure 1 and Figure 3 Specifically, the water outlet end plug 7 is a tubular plug with one end closed and one end open. The closed end of the water outlet end plug 7 is connected with the closed side 12 for plugging and fixing the closed side 12. The open end of the water outlet end plug 7 penetrates the second rubber body 52.

[0054] Specifically, the water outlet end plug 7 has a plurality of backwater holes 71 distributed on the wall of the water outlet end plug 7, and a concentrated water cavity 72 is arranged in the water outlet end plug 7. The concentrated liquid that does not pass through the ultrafiltration membrane wire group 4 flows into the concentrated water cavity 72 through the backwater holes 71.

[0055] In addition, the application also includes the water inlet side head cover 61 and the water outlet side head cover 62.

[0056] In this embodiment, the water inlet side head cover 61 is bonded to the first rubber body 51 by UPVC glue after the first rubber body 51 is completed and solidified. In other embodiments, the water inlet side head cover 61 can be directly bonded to the first rubber body 51 in a non-solidified state, but the space of the first rubber body 51 needs to be reserved during packaging to prevent the water inlet side head cover 61 from excessively pressing the first rubber body 51.

[0057] In this embodiment, the connection mode of the water outlet side head cover 62 and the second rubber body 52 is the same as that of the water inlet side head cover 61 and the first rubber body 51.

[0058] In this embodiment, the water inlet side head cover 61 and the inner wall of the ultrafiltration cartridge body 5 are bonded by UPVC glue, and the water outlet side head cover 62 and the inner wall of the ultrafiltration cartridge body 5 are also bonded by UPVC glue. In other embodiments, the connection mode can also be clamping or threaded connection, and the bonding mode can also be epoxy resin glue or polyurethane glue.

[0059] In this embodiment, the water inlet side head cover 61 is provided with a water inlet protruding pipe facing the outside of the ultrafiltration cartridge body 5. The pipeline of the water inlet protruding pipe is connected with the pipeline of the water inlet side 11 to send the external water to be filtered into the central distribution pipe 1. In other embodiments, a water inlet 611 can be directly formed at the center of the water inlet side head cover 61.

[0060] In the embodiment, the water outlet side head cover 62 is provided with a water outlet protruding pipe facing the inside of the ultrafiltration cylinder body 5. The water outlet side head cover 62 is provided with a concentrated water outlet 621 for discharging concentrated water impurities. The concentrated water outlet 621 and the concentrated water cavity 72 are in communication with each other. The water outlet protruding pipe is clamped with the open end of the water outlet end plug 7, so as to discharge the concentrated water to the outside of the assembly. In other embodiments, the connection mode of the water outlet protruding pipe and the water outlet end plug 7 can also be threaded connection or bonding. In addition, the water outlet side head cover 62 can not be provided with the water outlet protruding pipe. The open end of the water outlet end plug 7 can be designed to extend to the concentrated water outlet 621 and be fixedly connected with the water outlet side head cover.

[0061] Specifically, the water outlet side head cover 62 is provided with a water outlet 622, and the water outlet 622 is in communication with the water outlet hole 521.

[0062] In addition, the application also includes a first inner ring 81 and a second inner ring 82.

[0063] Specifically, the water inlet side head cover 61 and the ultrafiltration cylinder body 5 are provided with a first inner ring groove 91, and the first inner ring 81 is interference-fitted in the first inner ring groove 91. The water outlet side head cover 62 and the ultrafiltration cylinder body 5 are provided with a second inner ring groove 92, and the second inner ring 82 is interference-fitted in the second inner ring groove 92.

[0064] Specifically, the first inner ring 81 and the second inner ring 82 are respectively provided with a first pulling block 811 and a second pulling block 821, so as to facilitate the disassembly of the first inner ring 81 and the second inner ring 82, thereby opening the water inlet side head cover 61 and the water outlet side head cover 62.

[0065] In the embodiment, the material of the center distribution pipe 1, the partition plate 2, the ultrafiltration cylinder body 5, the first plug 513 and the second plug 523, the water inlet side head cover 61 and the water outlet side head cover 62, the first inner ring 81 and the second inner ring 82, and the first pulling block 811 and the second pulling block 821 is stainless steel. In other embodiments, the materials of all the above structures can also be polyvinyl chloride and polypropylene.

[0066] The packaging step of the embodiment is as follows: three partition plates 2 are clamped into the central distribution pipe 1, welding is performed at the clamping position, the water outlet end plug 7 is clamped and installed on the closed side 12 of the central distribution pipe 1, the ultrafiltration membrane filament group 4 is divided into three parts and is loaded into the membrane filament installation cavity 3 between the partition plates 2, the ultrafiltration membrane filaments of each part of the ultrafiltration membrane filament group 4 are arranged around the central distribution pipe 1 and towards the wall of the ultrafiltration cylinder 5, the central distribution pipe 1 loaded with the ultrafiltration membrane filament group 4 and the water outlet end plug 7 are loaded into the appropriate position in the ultrafiltration cylinder 5, the first glue 51 and the second glue 52 are centrifuged by using a centrifuge through the first glue injection port 512 and the second glue injection port 522, the first plug 513 and the second plug 523 are used to seal after the glue injection is completed, the second glue 52 is cut after the glue solidifies, the water outlet end of the water outlet end plug is cut to be communicated with the outside at the axis of the central distribution pipe 1, the water outlet hole 521 is cut at the edge position of the cross section of the ultrafiltration cylinder 5, the water inlet side plug cover 61 is adhered to the ultrafiltration cylinder 5 and the first glue 51 by using UPVC glue, the water inlet protruding pipe is connected with the water inlet side 11 of the central distribution pipe 1, the water outlet protruding pipe of the water outlet side plug cover 62 is clamped into the water outlet end plug 7, the water outlet side plug cover 62 is adhered to the other end of the ultrafiltration cylinder 5 and the second glue 52 by using UPVC glue, the concentrated water outlet 621 is connected with the water outlet protruding pipe and the water outlet hole 521, the plug cover clamping and sealing sleeve is clamped at both ends, finally, the first inner ring 81 is interference-fitted in the first inner ring groove 91, and the second inner ring 82 is interference-fitted in the second inner ring groove 92, and the packaging is completed.

[0067] The working principle of the embodiment is as follows: the water to be filtered flows into the central distribution pipe 1 through the protruding water inlet pipe of the water inlet side plug cover 61 and the water inlet side 11, the water to be filtered enters the membrane filament installation cavity 3 loaded with the ultrafiltration membrane filament group 4 through the first water distribution hole 13 on the wall, and the ultrafiltration operation is performed, the water to be filtered entering the membrane filament installation cavity 3 is quickly dispersed to each membrane filament group through the densely distributed second water distribution hole 24 on the water inlet high flow area 21 of the partition plate 2, the second water distribution hole 24 in the central area 22 is sparsely distributed, so that each membrane filament group performs the filtering operation while fully exchanging water, the water to be filtered after the ultrafiltration operation is discharged through the water outlet hole 521 at the edge of the ultrafiltration cylinder 5 and the water outlet 622, and the concentrated water that fails to pass through flows into the concentrated water cavity 72 through the backwater hole 71 of the water outlet end plug 7 and is discharged through the concentrated water outlet 621.

[0068] The above are the preferred embodiments of the application, which do not limit the protection scope of the application, so: any equivalent changes made on the basis of the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. An outside pressure type large volume ultrafiltration membrane module, characterized by, The utility model relates to a kind of ultrafiltration membrane module, including Center distribution pipe (1), one end of the center distribution pipe (1) is equipped with water inlet side (11), the other end is equipped with closed side (12), the center distribution pipe (1) pipe wall is distributed with several first water distribution hole (13) that the center distribution pipe (1) pipe wall is penetrated; Baffle (2), the baffle (2) is equipped with at least two and is fixedly connected in the center distribution pipe (1) pipe wall, the baffle (2) extension direction is consistent with the length direction of center distribution pipe (1), the baffle (2) is distributed around the center distribution pipe (1) and is angularly distributed, the baffle (2) is distributed with several second water distribution hole (24) that the baffle (2) is penetrated, each baffle (2) is divided into water inlet high flow area (21), center area (22) and water outlet high flow area (23) according to the density of second water distribution hole (24), adjacent baffle (2) between forms membrane filament installation cavity (3), the side of membrane filament installation cavity (3) far from center distribution pipe (1) is blocked to make water flow along the baffle (2) extension direction flow; Ultrafiltration membrane group (4), the ultrafiltration membrane group (4) is installed in the membrane filament installation cavity (3).

2. The outer pressure type large volume ultrafiltration membrane module according to claim 1, wherein The distribution of second water distribution hole (24) in water inlet high flow area (21) and water outlet high flow area (23) is more dense than the distribution of second water distribution hole (24) in center area (22).

3. The outer pressure type large volume ultrafiltration membrane module according to claim 1, wherein Also including ultrafiltration cylinder body (5), the ultrafiltration cylinder body (5) is used to block the membrane filament installation cavity (3), the ultrafiltration cylinder body (5) is equipped with first colloid (51) in center distribution pipe (1) water inlet side (11), the first colloid (51) is bonded with the inner wall of ultrafiltration cylinder body (5), one end of ultrafiltration membrane group (4) and the outer wall of center distribution pipe (1), the ultrafiltration cylinder body (5) is equipped with second colloid (52) in the other end, the second colloid (52) is bonded with the inner wall of ultrafiltration cylinder body (5), the other end of ultrafiltration membrane group (4).

4. The outer pressure type large volume ultrafiltration membrane module according to claim 3, wherein Also including water inlet side head plug (61) and water outlet side head plug (62), the water inlet side head plug (61) is bonded with the first colloid (51), the water outlet side head plug (62) is bonded with the second colloid (52), the water inlet side (11) can be communicated with outside through first colloid (51) and water inlet side head plug (61), the membrane filament installation cavity (3) can be communicated with outside through second colloid (52) and water outlet side head plug (62).

5. A large volume ultrafiltration membrane module of the external pressure type according to claim 4, characterized in that The first colloid (51) center forms water inlet hole (511) in the process of injecting glue, the center distribution pipe (1) is fixedly penetrated in the water inlet hole (511) in the water inlet side (11) one end, the water inlet side head plug (61) is equipped with water inlet (611), the water inlet (611) is communicated with the water inlet side (11).

6. The outer pressure type large volume ultrafiltration membrane module according to claim 4, wherein The closed side (12) is provided with a water outlet end plug (7), which is fixedly connected with the water outlet side head cover (62) after penetrating the second gel (52) away from one end of the central distribution pipe (1). The water outlet end plug (7) is distributed with a backwater hole (71) penetrating the pipe wall of the water outlet end plug (7). The water outlet end plug (7) is provided with a concentrated water cavity (72). The backwater hole (71) and the concentrated water cavity (72) are used to receive concentrated liquid that does not pass through the ultrafiltration membrane wire group (4). The water outlet side head cover (62) is provided with a concentrated water port (621) in communication with the concentrated water cavity (72). The second gel (52) is provided with a water production hole (521) at the edge position of the cross section of the ultrafiltration cylinder body (5). The water outlet side head cover (62) is provided with a water production port (622) in communication with the water production hole (521).

7. The outer pressure type large volume ultrafiltration membrane module according to claim 4, wherein It also includes a first inner ring (81) and a second inner ring (82). The water inlet side head cover (61) and the ultrafiltration cylinder body (5) are provided with a first inner ring groove (91). The first inner ring (81) is interference-fitted in the first inner ring groove (91). The water outlet side head cover (62) and the ultrafiltration cylinder body (5) are provided with a second inner ring groove (92). The second inner ring (82) is interference-fitted in the second inner ring groove (92).

8. The outer pressure type large volume ultrafiltration membrane module according to claim 7, wherein The first inner ring (81) is provided with a first pulling block (811). The second inner ring (82) is provided with a second pulling block (821). The first pulling block (811) and the second pulling block (821) are used to take out the inner ring.

9. The outer pressure type large volume ultrafiltration membrane module according to claim 3, wherein The sidewall of the ultrafiltration cylinder body (5) is provided with a first glue injection port (512) communicating with the first gel (51) and a second glue injection port (522) communicating with the second gel (52). The first glue injection port (512) is detachably connected with a first plug (513). The second glue injection port (522) is detachably connected with a second plug (523).

10. The outer pressure type large volume ultrafiltration membrane module according to claim 1, wherein The side edge of the partition plate (2) is provided with a protrusion (25). The outer wall of the central distribution pipe (1) is provided with a slot (14). The protrusion (25) is inserted into the slot (14).

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