Beam tube type external pressure ultrafiltration assembly

Abstract

The invention relates to the technical field of ultrafiltration membranes, in particular to a bundle tube type external pressure ultrafiltration assembly which comprises a plurality of bundle hollow tubes arranged side by side and further comprises membrane wire integrated bundles, a liquid collecting assembly and a flow dividing assembly, one membrane wire integrated bundle vertically penetrates through each bundle hollow tube, and the liquid collecting assembly and the flow dividing assembly are arranged side by side. The lower end of the bundling hollow pipe extends into the stock solution shunting cavity and is fixedly connected with the shunting assembly; sewage is shunted into the plurality of bundled hollow pipes through the shunting assembly, the sewage is filtered through the membrane wire integrated bundles in each bundled hollow pipe, and the hydraulic conditions of the membrane wire integrated bundles are relatively consistent under the guide action of the bundled hollow pipes, so that the membrane wire integrated bundles are uniform in water permeation, and the surfaces of the membrane wire integrated bundles are not easy to harden and hang mud; the problems of silting and blocking are not easy to occur, the anti-pollution performance of the assembly can be effectively improved, and the problem that silting and blocking are easy to occur among membrane wires in the operation process of the existing external pressure type ultrafiltration membrane is solved.

Description

Technical Field

[0001] The invention relates to the technical field of ultrafiltration membranes, and in particular to a bundled tube type external pressure ultrafiltration component. Background Art

[0002] Ultrafiltration membrane technology is a technology that uses membrane materials with specific pore sizes (usually less than 0.01 microns) to separate solutions. By applying appropriate pressure on one side of the membrane, selective screening of solute molecules can be achieved, so that molecules smaller than the membrane pore size can pass through the membrane, while larger molecules are retained. This technology (such as a new type of columnar external pressure membrane assembly disclosed in CN104028106B) has been widely used in water purification, industrial wastewater treatment, and medical pyrogen removal due to its high efficiency and environmental protection. For example, in the process of pure water preparation, ultrafiltration can effectively remove impurities such as suspended matter, colloids, and bacteria in water to ensure the quality of the effluent.

[0003] As in the above-mentioned prior art, in the existing external pressure ultrafiltration membrane system, multiple filter membranes are generally in the same flow channel. During filtration, the filter membranes in the flow channel are prone to uneven water permeability, and then easily form local high-concentration pollution areas, thereby causing siltation and blockage between membrane fibers. In order to solve the above technical problems, it is necessary to provide a bundled tube type external pressure ultrafiltration component. Summary of the invention

[0004] In view of this, the present invention proposes a bundle tube type external pressure ultrafiltration component, which diverts sewage to multiple bundled hollow tubes through a diversion component, and filters the sewage through the membrane filament integrated bundle in each bundled hollow tube. Under the guidance of the bundled hollow tube, the hydraulic conditions of each membrane filament integrated bundle are relatively consistent, so each membrane filament integrated bundle is uniformly permeable, and its surface is not prone to compaction and mud, and is not prone to siltation and clogging. The anti-pollution performance of the component can be effectively improved, and the problem of siltation and clogging between the membrane filaments of the existing external pressure ultrafiltration membrane during operation is solved.

[0005] The technical solution of the present invention is achieved in this way:

[0006] The present invention provides a bundled tube type external pressure ultrafiltration component, comprising a bundled hollow tube, a membrane filament integrated bundle, a liquid collecting component and a flow dividing component, wherein:

[0007] A plurality of the clustered hollow tubes are arranged side by side, each of which has a membrane fiber integrated bundle vertically penetrated therein, the inner side wall of the upper end of the clustered hollow tube is sealedly connected to the outer side wall of the upper end of the membrane fiber integrated bundle, and a perforation is arranged on the side wall of the upper end of the clustered hollow tube;

[0008] The liquid collecting component is provided with a concentrated liquid collecting chamber and a filtered liquid collecting chamber, and the liquid collecting component is provided with a water outlet and a drain outlet, the water outlet is communicated with the filtered liquid collecting chamber, and the drain outlet is communicated with the concentrated liquid collecting chamber;

[0009] The diversion component is provided with a raw liquid diversion cavity, and the diversion component is provided with a water inlet, and the water inlet is communicated with the raw liquid diversion cavity;

[0010] The lower end of the clustered hollow tube extends into the raw liquid diversion chamber and is fixedly connected to the diversion assembly, the upper end of the clustered hollow tube extends into the filtered liquid collection chamber and is fixedly connected to the collection assembly, and the perforation is located in the concentrated liquid collection chamber.

[0011] On the basis of the above technical solution, preferably, the liquid collecting assembly comprises an upper mounting seat, a partitioning baffle and an upper end cover, wherein:

[0012] The lower end of the upper mounting seat is fixedly connected to the clustered hollow tube, and the upper end is detachably connected to the lower end of the upper end cover;

[0013] The partitioning baffle is clamped and fixed between the upper mounting seat and the upper end cover, and a connecting circular hole is opened on the partitioning baffle at a position corresponding to the position of the clustered hollow tube, a hollow circular tube is fixed at the lower end of the connecting circular hole, and an externally threaded tube is fixed at the upper end, a hollow nut is screwed on the upper end of the externally threaded tube, and the lower end of the hollow circular tube is plugged into the upper end of the clustered hollow tube;

[0014] The upper end of the membrane fiber integrated bundle sequentially passes through the hollow round tube, the externally threaded tube, and the hollow nut and then extends into the filtrate collecting chamber, and the outer side wall of the membrane fiber integrated bundle is sealed and connected to the inner side wall of the externally threaded tube;

[0015] The concentrated liquid collecting chamber is arranged in the upper mounting seat, and the filtered liquid collecting chamber is arranged in the upper end cover;

[0016] The drain port is arranged on the upper mounting seat, and the water outlet is arranged on the upper end cover.

[0017] On the basis of the above technical solution, preferably, the upper mounting seat and the partition partition are sealedly connected, and the partition partition and the upper end cover are sealedly connected.

[0018] On the basis of the above technical solution, preferably, the flow diversion assembly includes a lower mounting seat and a lower end cover, wherein:

[0019] The upper end of the lower mounting seat is fixedly connected to the clustered hollow tube, and the lower end is detachably connected to the upper end of the lower end cover;

[0020] A raw liquid cavity is provided inside the lower end cover, and the raw liquid cavity is communicated with the raw liquid diversion cavity;

[0021] The water inlet is arranged on the lower end cover.

[0022] On the basis of the above technical solution, preferably, the lower mounting seat and the lower end cover are sealed and connected.

[0023] On the basis of the above technical solution, preferably, the lower end cover is provided with an air inlet, wherein:

[0024] The central axis of the air inlet is parallel to the clustered hollow tube, and the air inlet and the water outlet are arranged opposite to each other up and down.

[0025] On the basis of the above technical solution, preferably, the membrane yarn integrated bundle includes a soft rubber sleeve and PVDF membrane yarn, wherein:

[0026] The PVDF membrane filaments are provided with a plurality of strands, and the plurality of PVDF membrane filaments are cast into a bundle shape;

[0027] One end of the PVDF membrane thread is blocked, and the other end is fixed in a soft rubber cover;

[0028] The soft rubber sleeve is held between the externally threaded tube and the membrane filament integrated bundle.

[0029] On the basis of the above technical solution, preferably, the hollow circular tube includes a large diameter portion, a small diameter portion and a variable diameter portion, wherein:

[0030] The small diameter portion is arranged between the large diameter portion and the variable diameter portion, and the large diameter portion is fixed on the partitioning plate;

[0031] The small diameter portion is embedded in the port of the clustered hollow tube;

[0032] The diameter-changing portion is located at the side of the through hole, and the outer surface of the diameter-changing portion is in an arc shape.

[0033] On the basis of the above technical solution, preferably, the hollow tube further includes an elastic diaphragm, wherein:

[0034] The side of the small diameter portion has a plurality of membrane holes in a circumferential annular array, the membrane holes penetrate the side of the small diameter portion, and a piece of the elastic membrane is fixed in each of the membrane holes;

[0035] There are a plurality of perforations in a circumferential annular array along the bundled hollow tube, and a plurality of the perforations and a plurality of the membrane holes are arranged alternately.

[0036] On the basis of the above technical solution, preferably, a spiral groove is provided on the inner surface of the clustered hollow tube.

[0037] The bundled tube type external pressure ultrafiltration component of the present invention has the following beneficial effects compared with the prior art:

[0038] (1) The sewage is diverted to multiple clustered hollow tubes through the diversion component, and the sewage is filtered through the membrane fiber integrated bundle in each clustered hollow tube. Due to the guiding effect of the clustered hollow tube, the hydraulic conditions of each membrane fiber integrated bundle are relatively consistent. Therefore, each membrane fiber integrated bundle has uniform water permeability, and its surface is not easy to be hardened and muddy, and it is not easy to have siltation and blockage problems, thereby effectively improving the anti-pollution performance of the component. In addition, each membrane fiber integrated bundle is independently designed to facilitate disassembly and replacement, simplifying maintenance work.

[0039] (2) By setting up clustered hollow pipes, it is convenient to control the sewage flow rate. By increasing the flow rate, the cross-flow shear force is increased to prevent the retention and aggregation of pollutants, thereby improving the anti-pollution performance of the component. At the same time, it provides a wider range of water quality operating conditions and provides convenient conditions for the backwashing of the component.

[0040] (3) By arranging the reducing portion on the side of the perforation and the outer surface of the reducing portion being in an arc shape, the guiding effect of the arc-shaped surface can facilitate rapid discharge of the dirt that reaches the perforation, effectively guide the water flow, reduce the accumulation of dirt at the perforation, and further reduce the risk of clogging.

[0041] (4) A plurality of perforations are arranged in a circumferential annular array along the bundled hollow tube, and the plurality of perforations are arranged alternately with the plurality of membrane holes. An elastic diaphragm is fixed in each membrane hole, so that the elastic diaphragm can be deformed by controlling the flow rate of the sewage. When the flow rate increases, the elastic diaphragm is recessed toward the diameter-changing portion. When the flow rate decreases, the elastic diaphragm returns to its original position. When the flow rate is controlled to alternate between high and low speeds, the elastic diaphragm continues to deform elastically. The deformation of the elastic diaphragm is used to stir the surrounding liquid, which can effectively prevent the accumulation of dirt in areas without direct perforations for drainage, thereby further reducing the risk of blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 It is a front view of a bundled tube type external pressure ultrafiltration component of the present invention;

[0044] Figure 2 An exploded view of a bundled tube type external pressure ultrafiltration component of the present invention;

[0045] Figure 3 It is a partial stereoscopic view of the hollow circular tube of the present invention;

[0046] Figure 4 For the present invention Figure 3 A longitudinal section diagram of

[0047] Figure 5 For the present invention Figure 4 AA section view;

[0048] Figure 6 A longitudinal cross-sectional view of the bundled hollow tube of the present invention;

[0049] In the figure: 1, clustered hollow tube; 2, upper mounting seat; 3, partitioning baffle; 4, upper end cover; 5, lower mounting seat; 6, lower end cover; 7, membrane filament integrated bundle; 8, liquid collecting assembly; 9, diversion assembly; 1-1, perforation; 2-1, concentrated liquid collecting chamber; 2-2, first round hole; 2-3, drain outlet; 2-4, first extended edge; 2-5, first mounting notch; 2-6, first sealing ring; 3-1, connecting round hole; 3-2, external threaded tube; 3-3, external threaded part; 3-4, hollow nut; 3-5, hollow round tube; 3-51, large diameter part; 3-5 2. Small diameter portion; 3-53. Variable diameter portion; 3-54. Membrane hole; 3-55. Elastic diaphragm; 4-1. Filtered liquid collecting chamber; 4-2. Water outlet; 4-3. Second extended edge; 4-4. Second mounting groove; 4-5. Second sealing ring; 5-1. Original liquid diversion chamber; 5-2. Second circular hole; 5-3. Third extended edge; 5-4. Third mounting groove; 5-5. Third sealing ring; 6-1. Original liquid chamber; 6-2. Water inlet; 6-3. Fourth extended edge; 6-4. Air inlet; 7-1. Soft rubber cover; 7-2. PVDF membrane wire. DETAILED DESCRIPTION

[0050] The following will be combined with the specific implementation of the present invention to clearly and completely describe the technical solution in the present invention. Obviously, the described implementation is only a part of the implementation of the present invention, not all of the implementation. Based on the implementation of the present invention, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] like Figure 1-6 As shown, a bundled tube type external pressure ultrafiltration component of the present invention comprises a bundled hollow tube 1, an upper mounting seat 2, a partitioning baffle 3, an upper end cover 4, a lower mounting seat 5, a lower end cover 6 and a membrane filament integrated bundle 7.

[0052] The clustered hollow tube 1 is a plurality of independent hollow stainless steel round tubes arranged in parallel, each of which is vertically penetrated by a membrane fiber integrated bundle 7, wherein the inner wall of the upper end of the clustered hollow tube 1 is sealedly connected to the outer wall of the upper end of the membrane fiber integrated bundle 7, and a plurality of horseshoe-shaped perforations 1-1 are arranged around the top of one end of the hollow stainless steel round tube at about 10 cm, that is, a plurality of perforations 1-1 are arranged in a circumferential annular array along the clustered hollow tube 1.

[0053] The upper mounting seat 2, the partitioning baffle 3 and the upper end cover 4 form a liquid collecting component 8, and the lower mounting seat 5 and the lower end cover 6 form a diversion component 9, wherein a concentrated liquid collecting chamber 2-1 and a filtered liquid collecting chamber 4-1 are provided in the liquid collecting component 8, and a water outlet 4-2 and a drain outlet 2-3 are provided on the liquid collecting component 8, the water outlet 4-2 is connected to the filtered liquid collecting chamber 4-1, and the drain outlet 2-3 is connected to the concentrated liquid collecting chamber 2-1; a raw liquid diversion chamber 5-1 is provided in the diversion component 9, and a water inlet 6-2 is provided on the diversion component 9, and the water inlet 6-2 is connected to the raw liquid diversion chamber 5-1; the lower end of the clustered hollow tube 1 extends into the raw liquid diversion chamber 5-1 and is fixedly connected to the diversion component 9, the upper end of the clustered hollow tube 1 extends into the filtered liquid collecting chamber 4-1 and is fixedly connected to the liquid collecting component 8, and the perforation 1-1 is in the concentrated liquid collecting chamber 2-1.

[0054] In the above structure, the liquid collecting component 8 is used to collect the concentrated liquid and the filtrate respectively, and guide them to the corresponding subsequent processing steps respectively, wherein the liquid collecting component 8 is connected with the subsequent processing steps through a pipeline.

[0055] The diversion component 9 is used to divert sewage to each bundled hollow tube 1 so that the sewage can flow into each bundled hollow tube 1 evenly. Under the guidance of the bundled hollow tube 1, the hydraulic conditions of each membrane fiber integrated bundle 7 are relatively consistent. Therefore, each membrane fiber integrated bundle 7 is evenly permeable, and its surface is not prone to compaction and mud, and is not prone to siltation and blockage. The anti-pollution performance of the component can be effectively improved. At the same time, each membrane fiber integrated bundle 7 is independently designed to facilitate targeted disassembly and replacement, and convenient maintenance.

[0056] In the above structure, the upper mounting seat 2 is a stainless steel cylinder with a concentrated liquid collecting chamber 2-1 inside. There are a number of first circular holes 2-2 arranged in a ring at the bottom of the upper mounting seat 2. The inner diameter of the circular holes is adapted to the outer diameter of the bundled hollow tube 1, and a horseshoe-shaped perforation 1-1 about 5 cm at the top of one end of the bundled hollow tube 1 is welded and sealed; a drain port 2-3 is opened on the column body of the upper mounting seat 2, and the drain port 2-3 is connected with the concentrated liquid collecting chamber 2-1; a first extended edge 2-4 is provided on the upper edge of the upper mounting seat 2, and a first annular mounting groove 2-5 is provided on the upper end face of the first extended edge 2-4; a first annular sealing ring 2-6 is adapted in the first mounting groove 2-5.

[0057] The partition partition 3 is a stainless steel flat plate and has the same outer diameter as the upper mounting seat 2, wherein the upper mounting seat 2 is provided with a plurality of circular first circular holes 2-2 arranged in an annular shape, and the partition partition 3 is provided with a plurality of connecting circular holes 3-1 arranged in an annular shape, and the plurality of connecting circular holes 3-1 correspond one-to-one to the plurality of first circular holes 2-2.

[0058] The first circular hole 2 - 2 is used for penetrating installation of the clustered hollow tube 1 , and after installation, the two are sealed and fixed by welding.

[0059] A small section of externally threaded pipe 3-2 is welded to the upper end face of the circular hole 3-1 corresponding to the upper end of the partition partition 3, and an externally threaded portion 3-3 is provided on the outer side of the end of the externally threaded pipe 3-2. A hollow nut 3-4 is adapted to the externally threaded portion 3-3, and the central aperture of the hollow nut 3-4 matches the single-bundle membrane filament integrated bundle 7; a small section of hollow circular pipe 3-5 is welded to the lower end face of the circular hole 3-1 corresponding to the partition partition 3, and the outer diameter of the hollow circular pipe 3-5 matches the inner diameter of the bundled hollow pipe 1. During assembly, one end of the hollow circular pipe 3-5 is plugged into one end of the bundled hollow pipe 1, and one end of the membrane filament integrated bundle 7 successively penetrates the hollow circular pipe 3-5, the externally threaded pipe 3-2, and the hollow nut 3-4 and then extends to the filtrate collecting chamber 4-1.

[0060] The upper end cover 4 is a stainless steel pipe cap-shaped structure, and the interior is a filtered liquid collecting chamber 4-1. A water outlet 4-2 is provided at the top of the upper end cover 4, and the water outlet 4-2 is connected with the filtered liquid collecting chamber 4-1; the upper end cover 4 is provided with a second extended edge 4-3, and the lower end surface of the second extended edge 4-3 is provided with a ring-shaped second installation groove 4-4; the second installation groove 4-4 is adapted to be equipped with a second sealing ring 4-5.

[0061] In summary, the upper mounting seat 2 and the partition partition 3 and the upper end cover 4 can be fastened by a clamp through the first extended edge 2-4 and the second extended edge 4-3, and a sealed connection is achieved through the ring-shaped first sealing ring 2-6 and the second sealing ring 4-5; wherein the clamp is any throat clamp in the prior art, such as the stainless steel water pipe buckle clamp of the brand Zanlutong. Specifically, when fastening, the clamp clamps the first extended edge 2-4 and the second extended edge 4-3 on its inner side at the same time, and fastens them after locking. After fastening, the opposite ends of the upper mounting seat 2 and the partition partition 3 are sealed connected by the ring-shaped first sealing ring 2-6, and the opposite ends of the partition partition 3 and the upper end cover 4 are sealed connected by the second sealing ring 4-5.

[0062] The lower mounting seat 5 is a stainless steel cylinder with a raw liquid diversion chamber 5-1 inside. There are several second circular holes 5-2 arranged in a ring at the bottom of the lower mounting seat 5. The inner diameter of the circular hole is adapted to the outer diameter of the bundled hollow tube 1, and is welded and sealed about 5 cm from the tail end of the bundled hollow tube 1; a third extended edge 5-3 is provided on the upper edge of the lower mounting seat 5, and a third mounting groove 5-4 for installing an annular sealing strip is provided on the upper end surface of the third extended edge 5-3; the third mounting groove 5-4 is adapted to be equipped with a ring-shaped third sealing ring 5-5.

[0063] The lower end cover 6 is a stainless steel pipe cap-shaped structure, and the interior is a raw liquid cavity 6-1, and a water inlet 6-2 is provided at the top of the side of the lower end cover 6, and the water inlet 6-2 is connected to the raw liquid cavity 6-1; the lower end cover 6 is provided with a fourth extended edge 6-3; the bottom of the lower end cover 6 is provided with an air inlet 6-4, and the air inlet 6-4 is connected to the raw liquid cavity 6-1, and the central axis of the air inlet 6-4 is parallel to the clustered hollow tube 1, and the air inlet 6-4 and the water outlet 4-2 are arranged opposite to each other up and down.

[0064] In summary, the lower mounting seat 5 and the lower end cover 6 can be fastened by a clamp through the third extended edge 5-3 and the fourth extended edge 6-3. After fastening, a sealed connection is achieved through the annular third sealing ring 5-5. Specifically, the structure of the clamp fastening is the same as the clamp fastening structure of the first extended edge 2-4 and the second extended edge 4-3 mentioned above. When fastening, the clamp clamps the third extended edge 5-3 and the fourth extended edge 6-3 on their inner sides at the same time, and fastening is achieved after locking. After fastening, the opposite ends of the lower mounting seat 5 and the lower end cover 6 are sealed and connected through the annular third sealing ring 5-5.

[0065] The membrane filament integrated bundle 7 is formed by casting a plurality of PVDF membrane filaments 7-2, and one end of the PVDF membrane filament 7-2 is blocked, and the other end is exposed outside the casting layer and a soft rubber sleeve 7-1 is provided at the casting end. The membrane filament integrated bundle 7 can be sealed and sheathed in the hollow bundle hollow tube 1 through a hollow nut 3-4. After sheathing, the soft rubber sleeve 7-1 is supported between the external threaded tube 3-2 and the membrane filament integrated bundle 7.

[0066] In order to further improve the anti-blocking ability of the membrane assembly, a flow guide structure and a membrane structure are designed at the perforation 1-1, as follows:

[0067] like Figure 3As shown, the hollow circular tube 3-5 includes a large diameter portion 3-51, a small diameter portion 3-52 and a variable diameter portion 3-53, wherein the small diameter portion 3-52 is arranged between the large diameter portion 3-51 and the variable diameter portion 3-53, and the large diameter portion 3-51 is fixed on the partition partition 3; the small diameter portion 3-52 is embedded in the port of the clustered hollow tube 1; the variable diameter portion 3-53 is located on the side of the perforation 1-1, and the outer surface of the variable diameter portion 3-53 is arc-shaped; through the guiding effect of the arc-shaped surface, the dirt reaching the perforation 1-1 is discharged from the clustered hollow tube 1 as soon as possible, effectively guiding the water flow, so that the dirt is not easy to accumulate at the perforation 1-1, further reducing the risk of blockage.

[0068] like Figure 3-5 As shown, the hollow circular tube 3-5 also includes an elastic diaphragm 3-55, wherein the side of the small diameter portion 3-52 has a plurality of diaphragm holes 3-54 along a circumferential annular array, the diaphragm holes 3-54 penetrate the side of the small diameter portion 3-52, and an elastic diaphragm 3-55 is fixed in each diaphragm hole 3-54, and the elastic diaphragm 3-55 is in the shape of a sheet structure with an arc, and its shape is adapted to the outer surface shape of the small diameter portion 3-52. When there is no pressure, the outer surface of the elastic diaphragm 3-55 and the outer surface of the small diameter portion 3-52 have a streamline transition to guide the water flow; the perforations 1-1 have a plurality of diaphragm holes 3-54 along a circumferential annular array of the clustered hollow tube 1. , a plurality of perforations 1-1 and a plurality of membrane holes 3-54 are arranged alternately; the elastic diaphragm 3-55 is deformed by controlling the flow rate of sewage. When the flow rate increases, the elastic diaphragm 3-55 is recessed in the direction of the diameter-changing portion 3-53. When the flow rate decreases, the elastic diaphragm 3-55 returns to its original position. When the flow rate is controlled to alternate between high and low speeds, the elastic diaphragm 3-55 continues to elastically deform to stir the surrounding liquid, which can effectively prevent the accumulation of dirt in areas without direct perforation drainage, further reducing the risk of blockage. The perforation drainage area is the area inside the clustered hollow tube 1 and has the perforation 1-1.

[0069] In addition, the results of the comparison between the membrane area and flow rate of the conventional tubular assembly and the present invention are as follows:

[0070]

[0071] In addition, in order to increase the flow rate, spiral grooves are provided on the inner surface of the bundled hollow tube 1, through which the water flow is spirally advanced, thereby increasing the flow rate, improving the fluid distribution, and making it difficult for dirt to adhere to the surface of the membrane fiber integrated bundle 7, further reducing the risk of blockage.

[0072] The method for using a bundled tube type external pressure ultrafiltration component of the present invention is as follows:

[0073] After the membrane assembly is installed and docked, the filtrate is pressurized and enters the raw liquid diversion chamber 5-1 of the lower mounting seat 5 through the water inlet 6-2. The filtrate is evenly distributed and enters the hollow bundle hollow tube 1, and flows through the surface filtration layer of the membrane fiber integrated bundle 7 from bottom to top.

[0074] The permeate enters the inner space of the membrane fiber integrated bundle 7 and is guided to the filtrate collecting chamber 4-1 of the upper end cover 4, and then discharged from the membrane assembly through the outlet 4-2. The concentrated liquid rises along the outer surface of the membrane fiber integrated bundle 7 to the horseshoe-shaped perforation 1-1 and is guided into the concentrated liquid collecting chamber 2-1, and then discharged from the membrane assembly through the drain port 2-3.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bundled tube type external pressure ultrafiltration component, comprising a bundled hollow tube (1), characterized in that: It also includes a membrane fiber integrated bundle (7), a liquid collection component (8) and a flow distribution component (9), wherein: A plurality of the clustered hollow tubes (1) are arranged side by side, each of the clustered hollow tubes (1) having a membrane fiber integrated bundle (7) vertically penetrated therein, the inner side wall of the upper end of the clustered hollow tube (1) is sealedly connected to the outer side wall of the upper end of the membrane fiber integrated bundle (7), and a perforation (1-1) is arranged on the side wall of the upper end of the clustered hollow tube (1); The liquid collecting component (8) is provided with a concentrated liquid collecting chamber (2-1) and a filtered liquid collecting chamber (4-1), and the liquid collecting component (8) is provided with a water outlet (4-2) and a drain outlet (2-3), the water outlet (4-2) is communicated with the filtered liquid collecting chamber (4-1), and the drain outlet (2-3) is communicated with the concentrated liquid collecting chamber (2-1); The flow diversion component (9) is provided with a raw liquid diversion chamber (5-1), and the flow diversion component (9) is provided with a water inlet (6-2), and the water inlet (6-2) is communicated with the raw liquid diversion chamber (5-1); The lower end of the clustered hollow tube (1) extends into the raw liquid diversion chamber (5-1) and is fixedly connected to the diversion component (9); the upper end of the clustered hollow tube (1) extends into the filtered liquid collection chamber (4-1) and is fixedly connected to the collection component (8); and the perforation (1-1) is located in the concentrated liquid collection chamber (2-1).

2. A bundled tube type external pressure ultrafiltration component according to claim 1, characterized in that: The liquid collecting assembly (8) comprises an upper mounting seat (2), a partitioning baffle (3) and an upper end cover (4), wherein: The lower end of the upper mounting seat (2) is fixedly connected to the clustered hollow tube (1), and the upper end is detachably connected to the lower end of the upper end cover (4); The partitioning baffle (3) is clamped and fixed between the upper mounting seat (2) and the upper end cover (4); a connecting circular hole (3-1) is provided on the partitioning baffle (3) at a position corresponding to the clustered hollow tube (1); a hollow circular tube (3-5) is fixed to the lower end of the connecting circular hole (3-1); an externally threaded tube (3-2) is fixed to the upper end; a hollow nut (3-4) is screwed onto the upper end of the externally threaded tube (3-2); and the lower end of the hollow circular tube (3-5) is plugged into the upper end of the clustered hollow tube (1); The upper end of the membrane filament integrated bundle (7) sequentially passes through the hollow circular tube (3-5), the externally threaded tube (3-2), and the hollow nut (3-4), and then extends into the filtrate collecting chamber (4-1), and the outer side wall of the membrane filament integrated bundle (7) is sealedly connected to the inner side wall of the externally threaded tube (3-2); The concentrated liquid collecting chamber (2-1) is arranged in the upper mounting seat (2), and the filtered liquid collecting chamber (4-1) is arranged in the upper end cover (4); The water outlet (2-3) is arranged on the upper mounting seat (2), and the water outlet (4-2) is arranged on the upper end cover (4).

3. A bundled tube type external pressure ultrafiltration component according to claim 2, characterized in that: The upper mounting seat (2) is sealedly connected to the partitioning baffle (3), and the partitioning baffle (3) is sealedly connected to the upper end cover (4).

4. A bundled tube type external pressure ultrafiltration component as claimed in claim 3, characterized in that: The flow dividing assembly (9) comprises a lower mounting seat (5) and a lower end cover (6), wherein: The upper end of the lower mounting seat (5) is fixedly connected to the clustered hollow tube (1), and the lower end is detachably connected to the upper end of the lower end cover (6); A raw liquid chamber (6-1) is provided inside the lower end cover (6), and the raw liquid chamber (6-1) is communicated with the raw liquid diversion chamber (5-1); The water inlet (6-2) is arranged on the lower end cover (6).

5. A bundled tube type external pressure ultrafiltration component according to claim 4, characterized in that: The lower mounting seat (5) and the lower end cover (6) are sealedly connected.

6. A bundled tube type external pressure ultrafiltration component according to claim 5, characterized in that: The lower end cover (6) is provided with an air inlet (6-4), wherein: The central axis of the air inlet (6-4) is parallel to the clustered hollow tube (1), and the air inlet (6-4) and the water outlet (4-2) are arranged opposite to each other in the upper and lower directions.

7. A bundled tube type external pressure ultrafiltration component as claimed in claim 2, characterized in that: The membrane filament integrated bundle (7) comprises a soft rubber cover (7-1) and PVDF membrane filaments (7-2), wherein: The PVDF membrane filaments (7-2) are provided with a plurality of strands, and the plurality of PVDF membrane filaments (7-2) are cast into a bundle; One end of the PVDF membrane thread (7-2) is blocked, and the other end is fixed in the soft rubber cover (7-1); The soft rubber sleeve (7-1) is held between the externally threaded tube (3-2) and the membrane filament integrated bundle (7).

8. The bundled tube type external pressure ultrafiltration component according to claim 2, characterized in that: The hollow circular tube (3-5) comprises a large diameter portion (3-51), a small diameter portion (3-52) and a reduced diameter portion (3-53), wherein: The small diameter portion (3-52) is arranged between the large diameter portion (3-51) and the variable diameter portion (3-53), and the large diameter portion (3-51) is fixed on the partitioning plate (3); The small diameter portion (3-52) is embedded in the port of the clustered hollow tube (1); The diameter-changing portion (3-53) is located on the side of the through hole (1-1), and the outer surface of the diameter-changing portion (3-53) is in an arc shape.

9. A bundled tube type external pressure ultrafiltration component according to claim 8, characterized in that: The hollow circular tube (3-5) further includes an elastic diaphragm (3-55), wherein: The side of the small diameter portion (3-52) has a plurality of membrane holes (3-54) in a circumferential annular array, the membrane holes (3-54) penetrate the side of the small diameter portion (3-52), and a piece of the elastic membrane (3-55) is fixed in each of the membrane holes (3-54); There are a plurality of the perforations (1-1) in a circumferential annular array along the bundled hollow tube (1), and a plurality of the perforations (1-1) and a plurality of the membrane holes (3-54) are arranged in an alternating manner.

10. The bundled tube type external pressure ultrafiltration component according to claim 1, characterized in that: The inner surface of the clustered hollow tube (1) is provided with a spiral groove.

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