Tubular filtration membrane module

Abstract

The present invention relates to a tubular filtration membrane module comprising: a tubular filtration element formed by coating, with a polymer solution, the inner surface of a tubular support body formed into a tube shape by winding a non-woven fabric a plurality of times; a pipe-shaped housing that surrounds a plurality of the tubular filtration element; and module-forming means formed at both ends of the housing, which is penetrated at both ends, such that the tubular filtration elements and the housing are integrated to form a module, wherein the module-forming means ensure that the plurality of tubular filtration elements are spaced apart at certain intervals and arranged in a bundle inside the housing. The tubular filtration membrane module can be installed as a single module in accordance with various construction environments, such as submerged or pressurized environments, to perform filtration functions, and makes it possible to maximize the filtration efficiency of a module having a limited space and area.

Description

Tubular membrane filtration module

[0001] The present invention relates to a tubular filtration membrane module, and more particularly, to a tubular filtration membrane module that can be installed in a variety of construction environments, such as a submerged type or a pressurized type, as a single module to perform a filtration function, and can obtain maximum filtration efficiency from a module with a limited space and area.

[0002] In the field of filtration, in order to remove impurities including particulate matter from water, sewage, and wastewater, a membrane is typically used to filter pollutants in raw water (treatment liquid) to obtain produced water.

[0003] Membranes perform a general filtration function by selectively passing specific components through them to separate undissolved particles.

[0004] Additionally, membranes are useful for separating and removing suspended substances such as colloids and fine particles in wastewater.

[0005] Therefore, a separation membrane refers to a special membrane made of a material that can separate dissolved substances in a liquid or even mixed gases.

[0006] Depending on their performance, these separation membranes can be divided into microfiltration membranes (MF), ultrafiltration membranes (UF), nanofiltration membranes (NF), reverse osmosis membranes (RO), ion exchange membranes (IE), electrodialysis membranes (ED), gas separation membranes (GAS), and hemodialysis membranes.

[0007] Therefore, the membrane can be appropriately utilized depending on its intended use.

[0008] In addition, membranes can be classified into spiral-wound, hollow-fiber, tubular, plate & frame, hollow-fiber, and monolithic modules depending on their shape.

[0009] Among these, tubular membranes have strong durability and chemical resistance, and are used to treat high-concentration wastewater that is difficult to treat with other membranes or to concentrate pollutants or materials to be recovered, and various research and development efforts have been conducted on this.

[0010] From the above-mentioned viewpoint, examples of inventions include “filtration membrane element and filtration membrane module” (hereinafter referred to as “prior art”) of Patent No. 10-1260742.

[0011] The prior art is a filtration separation membrane element that performs solid-liquid separation treatment by being immersed in a treatment liquid containing suspended components.

[0012] Specifically, the prior art is a porous sheet formed into a cylindrical shape, at least having an elongated PTFE (polytetrafluoroethylene) porous membrane.

[0013] This prior art comprises a tubular filter membrane having a hollow portion surrounded by the aforementioned porous sheet as a passage for a completed treatment liquid, a support material for supporting the hollow portion that serves as the passage for the completed treatment liquid, and a sealing portion that seals both ends of the tubular filter membrane in the direction of the axis by creating at least one completed treatment liquid outlet.

[0014] However, existing filter devices, including prior art, require cleaning to remove impurities that accumulate on the filter membrane as filtration continues for continued use.

[0015] Therefore, in order to reduce fouling of the filter membrane, it is necessary to popularize cross-flow or cross-flow tubular membranes that can increase the flow velocity on the membrane surface. However, since these cross-flow or cross-flow tubular membranes are expensive, the development of a tubular membrane with price competitiveness is urgently needed.

[0016]

[0017] [Prior Art Literature]

[0018] [Patent Document]

[0019] Registered Patent No. 10-1260742

[0020] The present invention was invented to improve the above-mentioned problems, and to provide a tubular filtration membrane module that can be installed in a variety of construction environments, such as submerged or pressurized, as a single module to perform a filtration function, and to obtain maximum filtration efficiency from a module with limited space and area.

[0021] In order to achieve the above object, the present invention can provide a tubular filtration membrane module characterized by including: a tubular filtration element formed by coating the inner surface of a tubular support formed into a tube shape by winding a nonwoven fabric multiple times with a polymer solution; a housing in the form of a pipe that surrounds a plurality of the tubular filtration elements; and a module forming means formed at both ends of the housing that are perforated at both ends so that the tubular filtration elements and the housing integrally form a module, and arranging a plurality of the tubular filtration elements in the housing in a bundle shape with a predetermined interval therebetween.

[0022] Here, the connection of each end of the tubular filtering element along the longitudinal direction of the tubular filtering element is achieved by wrapping a heat-melting tape around the outer surface of the end of each of the tubular filtering elements, and at the same time, the length of the tubular filtering element corresponding to the length of the housing can be freely adjusted and selected for installation.

[0023] At this time, the tubular filter element is characterized by including a tubular support formed into a tube shape by heating a nonwoven fabric that is cut into a certain area with a certain width and a certain length, rolled up in multiple layers, to a temperature higher than the melting point to cause them to fuse with each other, and a separation membrane formed by coating the inner surface of the tubular support with a polymer solution.

[0024] And, the tubular filter element includes a tubular support made of a nonwoven fabric formed in a tube shape, and a separation membrane formed by coating the inner surface of the tubular support with a polymer solution, and the connection of each end of the tubular support along the length direction of the tubular support is characterized in that the connection is made by winding a film and a heat-sealing tape multiple times around the outer surface of the end of each of the tubular supports and fusing them.

[0025] And, the film has a thickness of 100㎛ or less, and the heat-sealing tape is wound 2 to 7 times, and the film and the heat-sealing tape are wound multiple times to connect the ends of each of the tubular supports, so that the thickness protruding from the outer surface of each of the tubular supports is 0.2 mm to 0.7 mm.

[0026] And, the tubular filtering element includes a tubular support made of a non-woven fabric formed in a tube shape, and the end connection of each of the tubular supports along the longitudinal direction of the tubular support is made by winding and fusing a film and a heat-melting tape multiple times on the outer surface of the end of each of the tubular supports, and the film and the heat-melting tape are wound multiple times for the end connection of each of the tubular supports, so that the thickness protruding from the outer surface of each of the tubular supports is formed to fill the distance between the outer surface of each of the tubular supports and the adjacent tubular supports so that the plurality of tubular supports are arranged in a bundle shape with a constant interval between them and sagging of the tubular supports is prevented.

[0027] And, the tubular filter element includes a tubular support made of a nonwoven fabric formed in a tube shape, and the connection of each end of the tubular support along the longitudinal direction of the tubular support is made by winding and fusing a film and a heat-melting tape multiple times on the outer surface of the end of each of the tubular supports, and the length of the connecting portion formed for the connection of the end of each of the tubular supports by winding the film and the heat-melting tape along the longitudinal direction of the tubular support is characterized in that it is 20 to 60 mm.

[0028] And, the outer diameter of the tubular filter element is characterized by being 6 to 15 mm.

[0029] And, the tubular filter element includes a tubular support made of a nonwoven fabric formed in a tube shape, and the nonwoven fabric is characterized in that it contains fibers having a melting point of 110 to 200 degrees Celsius.

[0030] And, it is characterized in that it further includes a diffuser connected to the housing and injecting air into the tubular filtering element, a molding panel formed in a disc shape that seals both end surfaces of the housing that are perforated at both ends and is connected to both ends of each of the plurality of tubular filtering elements, and a first communication hole formed on the molding panel so as to be connected to both ends of each of the plurality of tubular filtering elements arranged in a bundle shape at regular intervals, which constitutes the module forming means and has a diameter smaller than or equal to the inner diameter of each of the tubular filtering elements.

[0031] And, the module forming means further includes a first treated water discharge port formed in the center of the molding panel and through which treated water filtered from raw water flowing in from one end of each of the tubular filtering elements through a separation membrane formed on the inner surface of each of the tubular filtering elements is discharged, and the internal space formed by the molding panel and the housing is characterized in that it functions as a treated water collection unit in which treated water filtered from raw water flowing in from one end of each of the tubular filtering elements through a separation membrane formed on the inner surface of each of the tubular filtering elements is temporarily stored and discharged.

[0032] And, the module forming means further includes a connecting nozzle having an outer surface facing the inner surface of each of the tubular filtering elements, which protrudes and extends toward the inner space formed by the molding panel and the housing along the inner edge of each of the plurality of the communication holes, and the inner diameter of the connecting nozzle is 65 to 85% of the inner diameter of each of the tubular filtering elements, and the inner cross-sectional area formed into a circular shape by the inner diameter of the connecting nozzle is characterized in that it is 40 to 60% of the inner cross-sectional area formed into a circular shape by the inner diameter of each of the tubular filtering elements.

[0033] In addition, the module forming means is characterized in that it further includes a molding block that mutually fixes the outer surface of each of the two ends of the plurality of tubular filtering elements arranged in the bundle shape at a predetermined interval and the inner surface of each of the two ends of the housing, a second communication hole formed through the molding block so as to be connected to the two ends of each of the plurality of tubular filtering elements and communicates with the inside of each of the plurality of tubular filtering elements, and an inclined surface that is formed to be inclined and recessed from the outer surface of each of the molding blocks forming the two end faces of the housing and is connected to the edge of each of the two second communication holes.

[0034] In addition, it is characterized by further including a sanitary ferrule socket connected to the raw water pipe through which raw water mixed with foreign substances and pollutants flows, which is respectively connected to the outer surface of both ends of the housing and is installed on the raw water pipe, and a second treated water discharge port provided on one side of the outer surface of the housing and communicating with the internal space formed by the housing and the module forming means, and through which the raw water flowing in through the sanitary ferrule socket provided on one end of the housing and passing through the plurality of tubular filtering elements, is discharged as treated water filtered through a separation membrane formed on the inner surface of each of the tubular filtering elements.

[0035] According to the present invention having the above configuration, the following effects can be achieved.

[0036] First, the present invention can be installed in a single module to perform a filtration function in various construction environments, such as submerged or pressurized, and can also obtain maximum filtration efficiency from a module with limited space and area.

[0037] In addition, the present invention has the special advantage of preventing foreign substances or contaminants with relatively large particle sizes from attaching and maintaining filtration efficiency for a long time through periodic cleaning according to air injection into the air distribution tube.

[0038] Figure 1 is a perspective conceptual diagram illustrating the structure of a tubular filtration element and a housing, which are main parts of a tubular filtration membrane module according to one embodiment of the present invention.

[0039] FIG. 2 illustrates the structure of a tubular filtration membrane module according to various embodiments of the present invention. FIG. 2(a) is a conceptual diagram illustrating a submerged tubular filtration membrane module, and FIG. 2(b) is a conceptual diagram illustrating a pressurized tubular filtration membrane module.

[0040] FIG. 3 is a perspective view of the module forming means, which is the main part of the present invention, as viewed from the viewpoints iiia and iiib of FIG. 2(a). FIG. 3(a) is a perspective view conceptual diagram as viewed from the viewpoint iiia of FIG. 2(a), and FIG. 3(b) is a perspective view conceptual diagram as viewed from the viewpoint iiib of FIG. 2(a).

[0041] Fig. 4 is a partially enlarged cross-sectional view illustrating the connection relationship between the module forming means, which is the main part of the present invention, the tubular filtering element, and the housing, taken along the line iv-iv of Fig. 3(b).

[0042] Figures 5 and 6 are conceptual diagrams showing various structures of the module forming means, which is a main part of the pressurized tubular filter membrane module shown in Figure 2(b).

[0043] The advantages and features of the present invention and the method for achieving them will become clear with reference to the embodiments described in detail below together with the accompanying drawings.

[0044] The advantages and features of the present invention and the method for achieving them will become clear with reference to the embodiments described in detail below together with the accompanying drawings.

[0045] However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms.

[0046] The embodiments herein are provided to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention.

[0047] And the present invention is defined only by the scope of the claims.

[0048] Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques are not specifically described to avoid obscuring the present invention.

[0049] Additionally, throughout the specification, the same reference numerals refer to the same components, and the terminology used (referred to) in this specification is for the purpose of describing embodiments and is not intended to limit the present invention.

[0050] In this specification, the singular includes the plural unless specifically stated otherwise in the phrase, and the reference to an element or action as “including (or comprising)” does not exclude the presence or addition of one or more other elements or actions.

[0051] Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used in the sense commonly understood by a person of ordinary skill in the art to which the present invention belongs.

[0052] Also, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless they are defined otherwise.

[0053]

[0054] Hereinafter, a preferred embodiment of the present invention will be described with reference to the attached drawings.

[0055] First, FIG. 1 is a perspective conceptual diagram illustrating the structure of a tubular filter element and a housing, which are main parts of a tubular filter membrane module according to one embodiment of the present invention.

[0056] And, FIG. 2 is a diagram illustrating the structure of a tubular filtration membrane module according to various embodiments of the present invention, wherein FIG. 2(a) is a conceptual diagram illustrating an immersion-type tubular filtration membrane module, and FIG. 2(b) is a conceptual diagram illustrating a pressurized tubular filtration membrane module.

[0057] And, FIG. 3 is a diagram showing the structure of the module forming means (300), which is the main part of the present invention, as seen from the viewpoints iiia and iiib of FIG. 2(a), and FIG. 3(a) is a perspective conceptual diagram showing the view from the viewpoint iiia of FIG. 2(a), and FIG. 3(b) is a perspective conceptual diagram showing the view from the viewpoint iiib of FIG. 2(a).

[0058] In addition, FIG. 4 is a partially enlarged cross-sectional view illustrating the connection relationship between the module forming means (300), which is a main part of the present invention, and the tubular filtering element and housing, which is a cross-section taken along line iv-iv of FIG. 3(b).

[0059] In addition, FIGS. 5 and 6 are conceptual diagrams showing various structures of the module forming means (300), which is a main part of the pressurized tubular filter membrane module shown in FIG. 2(b).

[0060] For reference, the thick and transparent arrows in the drawing indicate the direction in which the raw water mixed with foreign substances and contaminants flows, and the thick and dark arrows indicate the direction in which the treated water from which foreign substances and contaminants have been removed by filtering the aforementioned raw water through a separation membrane (120) described later flows.

[0061]

[0062] As shown in FIGS. 1 to 6, the present invention may include a tubular filtration element (100) formed by coating the inner surface of a tubular support (110) formed into a tube shape by winding a nonwoven fabric multiple times with a polymer solution, a housing (200) in the form of a pipe that surrounds a plurality of tubular filtration elements (100), and a module forming means (300) formed at both ends of the housing (200) that is perforated at both ends so that the tubular filtration elements (100) and the housing (200) form a module as one unit.

[0063] The module forming means (300) is provided to support a plurality of tubular filtering elements (100) arranged in a bundle shape at regular intervals inside the housing (200).

[0064] The present invention can be applied to the above-described embodiments, and of course, the following various embodiments can be applied.

[0065]

[0066] First, the connection of each end of the tubular filtering element (100) along the length direction of the tubular filtering element (100) is achieved by wrapping a heat-sealing tape (not shown below) around the outer surface of each end of the tubular filtering element (100), and at the same time, the length of the tubular filtering element (100) corresponding to the length of the housing (200) can be freely adjusted and selected for installation.

[0067]

[0068] Meanwhile, the tubular filter element (100) may include a tubular support (110) formed into a tube shape by heating a nonwoven fabric that is cut into a certain area with a certain width and a certain length, rolled up in multiple layers, to a temperature higher than the melting point to allow them to fuse with each other, as shown in the enlarged portion on the upper side of FIG. 1, and a separation membrane (120) formed by coating the inner surface of the tubular support (110) with a polymer solution.

[0069] Specifically, manufacturing a tubular support (110) is done by winding a nonwoven fabric having a predetermined width cut to the desired length of the tubular support (110) in the width direction to form a pipe shape with multiple layers (Method 1).

[0070] In addition, a nonwoven fabric in the shape of a belt can be wound in a spiral shape along the outer surface of a cylindrical jig to form a tubular support (110) in the shape of a pipe with multiple layers (Method 2).

[0071] At this time, in the case of method 2, there are many overlapping parts, so loss of the tubular support (110) occurs, and the thickness is not constant during internal coating, so the effective membrane area may decrease.

[0072] Therefore, when manufacturing a tubular support (110) by adopting method 1, not only can the loss portion of the tubular support (110) be minimized because there is almost no overlapping portion, but also the internal coating can be performed at a constant thickness, so that the effective membrane area can be utilized to the maximum extent.

[0073] Here, the connection of each end of the tubular support (110) along the length direction of the tubular support (110) can be achieved by winding a film (not shown below) and a heat-melting tape multiple times around the outer surface of each end of the tubular support (110) and melting them.

[0074] At this time, the film has a thickness of 100㎛ or less, and the heat-melting tape is wound 2 to 7 times. However, since the film and the heat-melting tape are wound multiple times to connect the ends of each tubular support (110), the thickness protruding from the outer surface of each tubular support (110) is made to be approximately 0.2 mm to 0.7 mm.

[0075] The number of times the aforementioned heat-sealing tape is wound is more preferably 2 to 5 times, and the thickness of the heat-sealing tape protruding from the outer surface of each of the aforementioned tubular supports (110) is more preferably 0.2 to 0.5 mm.

[0076] The film and heat-sealing tape can be formed to extend the length of each tubular support (110) and are arranged at regular intervals, thereby providing a technical means to prevent problems such as sagging or bending when a plurality of tubular supports (110) are connected.

[0077] The heat-melting tape is more preferably wound 5 times or less, and the total thickness of the film protruding from the outer surface of each tubular support (110) and the heat-melting tape wound is 0.5 mm or less.

[0078] If the number of turns of the heat-melting tape is less than 2, there will be a problem of the connection strength of each tubular support (110) being reduced, and if the number of turns of the heat-melting tape exceeds 7, not only will a problem arise in that each of the multiple tubular supports (110) will be supported in a bundle form while maintaining a certain interval, but it will also result in waste of raw materials.

[0079] In addition, if the thickness protruding from the outer surface of each tubular support (110) by the heat-sealing tape is less than 0.2 mm, there will be a problem in that the connection strength of each tubular support (110) is reduced.

[0080] In addition, if the thickness protruding from the outer surface of each tubular support (110) by the heat-sealing tape exceeds 0.5 mm, a plurality of tubular supports (110) are supported in a bundle shape while maintaining a certain interval. In this case, not only will the problem of not being able to install more tubular supports (110) in a limited area arise, but it will also result in waste of raw materials.

[0081] In addition, since the film and the heat-sealing tape are wound multiple times for connecting the ends of each of the tubular supports (110), it is preferable that the thickness protruding from the outer surface of each of the tubular supports (110) be formed to fill the distance between the outer surface of each of the tubular supports (110) and the outer surface of each of the adjacent tubular supports (110) so that a plurality of tubular supports (110) are arranged in a bundle shape with a certain interval at a certain interval inside the housing (200).

[0082] Accordingly, by forming the tubular support (110) to fill the distance between the outer surface of each of the adjacent tubular supports (110), it will be possible to prevent the tubular support (110) from sagging.

[0083] In addition, the length of the connecting portion formed for connecting each end of the tubular support (110) by winding the film and the heat-sealing tape is formed in the length direction of the tubular support (110) within the range of 20 to 60 mm.

[0084] The length of the tubular support (110) of the connecting portion in the longitudinal direction is more preferably 40 mm or less.

[0085] Here, if the length of the tubular support (110) along the longitudinal direction by winding the film and the heat-sealing tape is less than 20 mm, there will be a problem that the connection strength of each tubular support (110) is reduced, and if the length of the tubular support (110) along the longitudinal direction by winding the film and the heat-sealing tape exceeds 60 mm, not only will the effective filtration area of ​​each of the plurality of tubular supports (110) be reduced, but it will also result in waste of raw materials.

[0086] Meanwhile, the outer diameter of the tubular filter element (100) may be manufactured within the range of 6 to 15 mm.

[0087] Here, the outer diameter of the tubular filter element (100) is more preferably designed to be 10 mm or less.

[0088] At this time, if the outer diameter of the tubular filter element (100) is less than 6 mm, not only will the number of tubular filter elements (100) to be installed for filtration and the installation time increase, but clogging due to foreign substances contained in the raw water may also occur frequently.

[0089] In addition, if the outer diameter of the tubular filter element (100) exceeds 15 mm, a problem will arise in that each of the plurality of tubular supports (110) will be supported in a bundle shape while maintaining a certain interval, and this will also result in waste of raw materials.

[0090] In addition, the melting point of the nonwoven fabric constituting the tubular filter element (100) is made to contain fibers having a melting point of 110 to 200 degrees Celsius, thereby enabling the filtering function to be implemented while maintaining heat resistance and durability in the treatment of raw water in a variety of temperature ranges.

[0091]

[0092] Meanwhile, as shown in FIG. 2(a), FIG. 3 and FIG. 4, the tubular filtration membrane module according to the present invention can function as an immersion-type tubular filtration membrane module, wherein the module forming means (300) is formed in a circular shape that seals both end surfaces of the housing (200) that is perforated at both ends, and can include a molding panel (310) that is connected to both ends of each of the plurality of tubular filtration elements (100).

[0093] At this time, the module forming means (300) is formed on the molding panel (310) so as to be connected to both ends of each of a plurality of tubular filtering elements (100) arranged in a bundle shape at regular intervals, and may include a first communication hole (312) having a diameter smaller than the inner diameter of each of the tubular filtering elements (100).

[0094] The reason why the inner diameter of the first communication hole (312) must be smaller than the inner diameter of each tubular filter element (100) will be explained in more detail in the description of the relationship with the connecting nozzle (313) described later.

[0095] The module forming means (300) is preferably formed on the outer surface of the molding panel (310) forming each of the two end surfaces of the housing (200) to induce smooth entry and exit of raw water, and further includes an entry and exit guide chamfer (311) formed slantedly along the edge of each of the first communication holes (312).

[0096]

[0097] Meanwhile, the internal space formed by the molding panel (310) and the housing (200), as will be more specifically examined with reference to FIG. 4, can function as a treated water collection unit (201) in which treated water filtered through the separation membrane (120) formed on the inner surface of each tubular filtering element (100) from the raw water flowing in from one end of each tubular filtering element (100) is temporarily stored and discharged.

[0098] That is, the internal space described above serves as a treated water collection unit (201), but the tubular filtration membrane module according to the present invention functions as an immersed tubular filtration membrane module as a whole, and specifically, it can perform a filtration function by immersing it in a treatment tank (not shown below) containing raw water.

[0099]

[0100] Meanwhile, the module forming means (300), as will be described in more detail with reference to FIG. 3 again, may further include a first treated water discharge port (315) formed in the center of the molding panel (310) and through which treated water filtered from raw water flowing in from one end of each tubular filtering element (100) through a separation membrane (120) formed on the inner surface of each tubular filtering element (100) is discharged.

[0101] Here, a connecting tube (314, see FIG. 3(b) below) formed in the center of the outer surface of the molding panel (310) forming both end surfaces of the housing (200) and communicating with the first treatment water discharge port (315) may be further included.

[0102] At this time, the connecting tube (314) is provided to provide a joining space and area of ​​a pipe connecting member such as a pipe coupling (316, see FIG. 2(a) below).

[0103] In addition, the pipe coupling (316) or the first treated water discharge port (315) described above, although not specifically illustrated, may also be connected to an air chamber for cleaning foreign substances attached to the inner surface of the separation membrane (120) after a certain period of time has elapsed, and by periodically cleaning the inner surface of the separation membrane (120) by injecting pulse air through the air pipe described above, it will be possible to continuously maintain smooth filtration performance.

[0104]

[0105] Meanwhile, the module forming means (300), looking more specifically with reference to FIG. 4 again, may further include a connecting nozzle (313) that protrudes and extends toward the inner space formed by the molding panel (310) and the housing (200) along the inner edge of each of the plurality of first communication holes (312), i.e., the treated water collection unit (201), and has an outer surface facing the inner surface of each of the tubular filtering elements (100).

[0106] Here, the inner diameter of the connecting nozzle (313) is preferably 65 to 85% of the inner diameter of each tubular filtering element (100), and the inner cross-sectional area formed into a circular shape by the inner diameter of the connecting nozzle (313) is preferably 40 to 60% of the inner cross-sectional area formed into a circular shape by the inner diameter of each tubular filtering element (100).

[0107] At this time, the inner diameter of the connecting nozzle (313) is more preferably designed to be less than 75% of the inner diameter of each tubular filtering element (100).

[0108] The internal cross-sectional area formed into a circular shape by the inner diameter of the connecting nozzle (313) is preferably designed to be 50% or less of the internal cross-sectional area formed into a circular shape by the inner diameter of each tubular filtering element (100).

[0109] The internal cross-sectional area formed into a circular shape by the inner diameter of the connecting nozzle (313) is designed to be approximately 41% of the internal cross-sectional area formed into a circular shape by the inner diameter of each tubular filtering element (100).

[0110] If the inner diameter of the connecting nozzle (313) is less than 65% of the inner diameter of each tubular filtration element (100), the two ends of each tubular filtration element (100) will not be fixed and supported, and if the inner diameter of the connecting nozzle (313) exceeds 85% of the inner diameter of each tubular filtration element (100), the two ends of each tubular filtration element (100) will not be joined and fixed.

[0111] Here, if the internal cross-sectional area of ​​the inner diameter of the connecting nozzle (313) is less than 40% of the internal cross-sectional area of ​​the inner diameter of each tubular filtering element (100), smooth inflow and outflow of raw water will not be achieved.

[0112] At this time, if the internal cross-sectional area of ​​the inner diameter of the connecting nozzle (313) exceeds 60% of the internal cross-sectional area of ​​the inner diameter of each tubular filtering element (100), the fixing and supporting strength of each end of the tubular filtering element (100) is weakened, causing brittleness and heat, and there is a risk of breakage and deterioration after a certain period of time.

[0113] In other words, since the number of connecting nozzles (313) connected to the first communication hole (312) formed through the molding panel (310) is very large compared to the limited area of ​​the molding panel (310), it is difficult to ensure that the pulsed air is uniformly distributed and reaches the inside of each tubular filtering element (100).

[0114] Therefore, in order for foreign substances to be washed away by uniformly reaching each of the tubular filtering elements (100) through the first communication hole (312) and the connecting nozzle (313), the cross-sectional area ratio mentioned above, i.e., the internal cross-sectional area of ​​the connecting nozzle (313), must be approximately 41% of the internal cross-sectional area of ​​each of the tubular filtering elements (100).

[0115]

[0116] Meanwhile, as shown in FIG. 2(b) and FIGS. 5 and 6, the tubular filtration membrane module according to the present invention can function as a pressurized tubular filtration membrane module, wherein the module forming means (300) can include an integral mold part (320, see FIG. 5) formed by an epoxy resin or urethane resin that is filled and solidified between the inner surface of both ends of the housing (200) and the outer surface of each of both ends of a plurality of tubular filtration elements (100) arranged in a bundle shape at regular intervals.

[0117]

[0118] In addition, in the pressurized tubular filter module, the module forming means (300) may include a molding block (330) that mutually fixes the outer surface of each of the two ends of a plurality of tubular filter elements (100) arranged in a bundle shape at regular intervals, as shown in FIG. 6, and the inner surface of each of the two ends of the housing (200).

[0119] In addition, the module forming means (300) may include a second communication hole (332) formed through a molding block (330) to be connected to both ends of each of the plurality of tubular filtering elements (100) and communicate with the inside of each of the plurality of tubular filtering elements (100).

[0120] In addition, the module forming means (300) may include an inclined surface (333) that is formed to be inclined and recessed from the outer surface of each of the molding blocks (330) forming the two end surfaces of the housing (200) and connected to the edge of each of the plurality of third communication holes (332).

[0121] Here, it is preferable that the inclined surface (333) be designed and manufactured with almost no flat portion on the outer surface of the molding block (330) as shown so as to minimize the area where relatively large foreign substances contained in the raw water flowing in through each of the second communication holes (332) from the outer surface of the molding block (330) can adhere.

[0122]

[0123] Meanwhile, in the pressurized tubular filter module, referring again to FIG. 2(b) and FIG. 5 and FIG. 6, a sanitary ferrule socket (340) may be further provided, which is connected to the raw water pipe through which the raw water containing foreign substances and contaminants flows, and which is coupled to the outer peripheral surface of each end of the housing (200), respectively.

[0124] In addition, the pressurized tubular filter module may further include a second treated water discharge port (345) provided on one side of the outer surface of the housing (200) and communicating with the internal space formed by the housing (200) and the module forming means (300).

[0125] The second treated water discharge port (345) can provide a path for the treated water to be discharged through the separation membrane (120) formed on the inner surface of each of the tubular filtering elements (100) from the raw water flowing in through the sanitary ferrule socket (340) provided at one end of the housing (200) and passing through the plurality of tubular filtering elements (100).

[0126]

[0127] As described above, it can be seen that the present invention has as its basic technical idea the provision of a tubular filtration membrane module that can be installed in various construction environments, such as submerged or pressurized, as a single module to perform a filtration function, and that can obtain maximum filtration efficiency from a module with a limited space and area.

[0128] And, of course, many other modifications and applications are also possible for those with common knowledge in the industry within the scope of the basic technical idea of ​​the present invention.

Claims

1. A tubular filter element formed by coating the inner surface of a tubular support formed into a tube shape by winding a nonwoven fabric multiple times with a polymer solution; A tubular housing enclosing a plurality of the above tubular filtering elements; and A tubular filtration membrane module characterized in that it includes a module forming means formed at both ends of the housing so that the tubular filtration element and the housing are integrally formed into a module, and a plurality of the tubular filtration elements are arranged in a bundle shape at regular intervals inside the housing.

2. In claim 1, A tubular filtration membrane module characterized in that the end connection of each of the tubular filtration elements along the longitudinal direction of the tubular filtration elements is achieved by wrapping a heat-melting tape around the outer surface of the end of each of the tubular filtration elements, and the length of the tubular filtration elements can be freely adjusted and selected to correspond to the length of the housing, thereby enabling installation.

3. In claim 1, The above tubular filter element, A tubular support formed into a tube shape by heating a nonwoven fabric that is cut into a certain area with a certain width and a certain length, rolled up in multiple layers, to a temperature higher than the melting point to cause it to fuse with each other, A tubular filtration membrane module characterized by including a separation membrane formed by coating the inner surface of the tubular support with a polymer solution.

4. In claim 1, The above tubular filter element, The tubular support made of a non-woven fabric formed into a tube shape, It includes a separator formed by coating the inner surface of the tubular support with a polymer solution, A tubular filtration membrane module characterized in that the connection of each end of the tubular support along the longitudinal direction of the tubular support is made by winding and fusing a film and a heat-melting tape multiple times on the outer surface of the end of each of the tubular supports.

5. In claim 4, The above film has a thickness of 100㎛ or less, The above heat-sealing tape is wound 2 to 7 times. A tubular filtration membrane module characterized in that the film and the heat-sealing tape are wound multiple times to connect the ends of each of the tubular supports, and the thickness protruding from the outer surface of each of the tubular supports is 0.2 mm to 0.7 mm.

6. In claim 1, The above tubular filter element, A tubular support made of a nonwoven fabric formed into a tube shape, The connection of each end of the tubular support along the longitudinal direction of the tubular support is made by winding and fusing a film and a heat-melting tape multiple times on the outer surface of each end of the tubular support. The above film and the heat-sealing tape are wound multiple times to connect the ends of each of the tubular supports, so that the thickness protruding from the outer surface of each of the tubular supports is A tubular filtration membrane module characterized in that a plurality of the tubular supports are arranged in a bundle shape with a predetermined interval between them inside the housing, and the predetermined interval is maintained so as to prevent sagging of the tubular supports, thereby filling the distance between the outer surfaces of each of the tubular supports and the adjacent tubular supports.

7. In claim 1, The above tubular filter element, A tubular support made of a nonwoven fabric formed into a tube shape, The connection of each end of the tubular support along the longitudinal direction of the tubular support is made by winding and fusing a film and a heat-melting tape multiple times on the outer surface of each end of the tubular support. A tubular filtration membrane module, characterized in that the length of the connecting portion formed for connecting the ends of each of the tubular supports by winding the film and the heat-sealing tape is 20 to 60 mm along the longitudinal direction of the tubular support.

8. In claim 1, A tubular filtration membrane module, characterized in that the outer diameter of the tubular filtration element is 6 to 15 mm.

9. In claim 1, The above tubular filter element, A tubular support made of a nonwoven fabric formed into a tube shape, A tubular filter membrane module characterized in that the nonwoven fabric contains fibers having a melting point of 110 to 200 degrees Celsius.

10. In claim 1, An air diffuser connected to the housing and injecting air into the tubular filter element; As a component of the above module forming means, a molding panel formed in a circular shape that seals both ends of the housing, which is a double-ended opening, and is connected to both ends of each of the plurality of tubular filtering elements, A tubular filtration membrane module comprising a first communication hole formed on the molding panel so as to be connected to both ends of each of the plurality of tubular filtration elements arranged in a bundle shape at regular intervals, and having a diameter smaller than or equal to the inner diameter of each of the tubular filtration elements, which constitutes the module forming means.

11. In claim 10, The above module forming means is, It further includes a first treated water discharge port formed in the center of the molding panel, through which treated water filtered from raw water flowing in from one end of each of the tubular filtering elements is discharged through a separation membrane formed on the inner surface of each of the tubular filtering elements. The internal space formed by the above molding panel and the above housing is A tubular filtration membrane module characterized in that it functions as a treated water collection unit in which treated water filtered through a separation membrane formed on the inner surface of each of the tubular filtration elements from raw water flowing in from one end of each of the tubular filtration elements is temporarily stored and discharged.

12. In claim 10, The above module forming means is, Further comprising a connecting nozzle having an outer surface facing the inner surface of each of the tubular filtering elements, the connecting nozzle protruding and extending toward the inner space formed by the molding panel and the housing along the inner edge of each of the plurality of first communication holes, The inner diameter of the above connecting nozzle is 65 to 85% of the inner diameter of each of the above tubular filter elements, A tubular filtration membrane module, characterized in that the internal cross-sectional area formed into a circular shape by the inner diameter of the above connecting nozzle is 40 to 60% of the internal cross-sectional area formed into a circular shape by the inner diameter of each of the above tubular filtration elements.

13. In claim 1, The above module forming means is, A molding block that mutually fixes the outer surface of each of the two ends of the plurality of tubular filtering elements arranged in the bundle shape at the above-mentioned regular intervals and the inner surface of each end of the housing; A second communication hole formed through the molding block so as to be connected to both ends of each of the plurality of tubular filtering elements and communicate with the inside of each of the plurality of tubular filtering elements, A tubular filter membrane module further characterized by including an inclined surface formed obliquely from the outer surface of each of the molding blocks forming the two end surfaces of the housing and connected to the edge of each of the plurality of second communication holes.

14. In claim 13, A sanitary ferrule socket connected to the raw water pipe through which raw water mixed with foreign substances and contaminants flows, and which is mounted on the outer surface of each end of the housing, A tubular filtration membrane module characterized in that it further includes a second treated water discharge port provided on one side of the outer circumference of the housing and communicating with the inner space formed by the housing and the module forming means, and through which treated water filtered from the raw water flowing in from the sanitary ferrule socket provided on one end of the housing and passing through the plurality of tubular filtration elements is discharged through a separation membrane formed on the inner circumference of each of the tubular filtration elements.

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