Method for manufacturing a filtration membrane module

Abstract

The application relates to a manufacturing method of a filter membrane assembly, which comprises the following steps: providing at least one filter membrane piece, the filter membrane piece having at least two spaced-apart barrier layer groups, the barrier layer group comprising at least two spaced-apart barrier layers; arranging a forming jig outside the filter membrane piece, the forming jig being matched with the adjacent two barrier layers in the barrier layer group to form a top-end-opened pouring cavity; pouring a pouring material into the pouring cavity to form at least two semi-finished end covers; and cutting the semi-finished end cover to form at least one filter membrane assembly with filter end covers at two ends, the filter membrane in the filter end cover being in an open state.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and in particular to a method for manufacturing a filter membrane assembly. Background Technology

[0002] Membrane filtration modules are a crucial component of membrane filtration technology for wastewater treatment. The membranes used in these modules are primarily categorized into hollow fiber membranes, flat sheet membranes, tubular membranes, and spiral wound membranes. Hollow fiber membranes, due to their large filtration surface area and strong process adaptability, are widely used in municipal wastewater treatment, municipal water supply treatment, industrial wastewater treatment, and household water purification. Therefore, the manufacturing method for membrane filtration modules typically involves solidifying and connecting multiple hollow fiber membranes with a casting material between the ends or the inner wall of the casing. Then, a portion of the casting material is removed from the hollow fiber membrane to form a filter end cap, thus opening the end face of the hollow fiber membrane. Examples include the membrane filtration module preparation methods described in Chinese patent applications CN200880013346.8 and CN200710196205.1. However, this method involves removing the solidified casting material to open the end face of the hollow fiber membrane, resulting in waste of casting material and part of the hollow fiber membrane, as well as increased production time and manufacturing costs.

[0003] To address the aforementioned issues, an alternative method for manufacturing filter membrane modules has been developed, such as the method described in Chinese patent applications CN200580044206.3 and CN202010333437.2. This method involves pre-forming hollow fiber membranes into sheets and covering both ends of the sheets with two barrier layers at intervals. Multiple membrane sheets are then stacked to form a casting cavity between the two barrier layers. A potting material is then injected into the casting cavity to form a filter head, while the two ends of the membrane remain open, thus avoiding waste of potting material and increased processing time and costs.

[0004] However, the filter heads produced by the above manufacturing methods cannot guarantee the flatness of the filter heads, which is not conducive to the subsequent installation of the filter heads. Summary of the Invention

[0005] Therefore, it is necessary to provide a method for manufacturing a filter membrane module to address the problem of uneven filter end caps in currently manufactured filter membrane modules.

[0006] A method for manufacturing a filter membrane module includes the following steps:

[0007] S1. Provide at least one filter membrane body, the filter membrane body having at least two spaced-apart barrier layer groups, the barrier layer groups including at least two spaced-apart barrier layers.

[0008] S2. A molding fixture is provided on the outside of the filter membrane body. The molding fixture cooperates with two adjacent barrier layers in the barrier layer group to form a casting cavity with an open top.

[0009] S3. Inject casting material into the casting cavity to form at least two semi-finished end caps;

[0010] S4. Cut the semi-finished end cap to form at least one filter membrane assembly with filter end caps at both ends, wherein the filter membrane in the filter end cap is in an open state.

[0011] The above-mentioned method for manufacturing a filter membrane assembly involves providing at least one filter membrane sheet having at least two spaced-apart barrier layer groups to obtain a filter membrane sheet having barrier layer groups; then, in step S2, a forming jig is provided on the outside of the filter membrane sheet, and the forming jig cooperates with two adjacent barrier layers in the barrier layer groups to form a casting cavity with an open top for subsequent casting; in step S3, casting material is injected into the casting cavity to form at least two semi-finished end caps to obtain a filter membrane that is tightly bonded to each other; and in step S4, the semi-finished end caps are cut to form at least one filter membrane assembly with filter end caps at both ends, wherein the filter membrane in the filter end caps is in an open state; in the method for manufacturing a filter membrane assembly, this application improves the flatness of the filter end caps by cutting the semi-finished end caps to form at least one filter membrane assembly with filter end caps at both ends.

[0012] In one embodiment, the filter membrane body has at least three spaced-apart barrier layer groups, the casting material is injected into the casting cavity to form at least three semi-finished end caps, and the semi-finished end caps are cut to form at least two filter membrane assemblies having the filter end caps.

[0013] In one embodiment, step S4 specifically includes cutting along the centerline between two adjacent barrier layers in the same barrier layer group.

[0014] In one embodiment, in step S1, the barrier layer group includes three spaced-apart barrier layers.

[0015] In one embodiment, in step S4, the barrier layer is cut along the width of the barrier layer located in the middle of the same barrier layer group.

[0016] In one embodiment, the barrier layer is cut along the centerline of the barrier layer located in the middle of the same barrier layer group.

[0017] In one embodiment, step S1 specifically includes the following steps:

[0018] S11. Provide multiple filter membranes;

[0019] S12. Arrange multiple filter membranes in parallel and spaced intervals into a single layer or multiple layers to form a filter membrane arrangement;

[0020] S13. At least two barrier layer groups are spaced apart along the length direction of the filter membrane arrangement to form the filter membrane sheet.

[0021] In one embodiment, steps S1 and S2 specifically include the following steps:

[0022] Provide multiple of the aforementioned filter membrane sheets;

[0023] Multiple filter membrane sheets are stacked together, and two adjacent barrier layers along the stacking direction of the multiple filter membrane sheets are bonded together to obtain a stacked membrane sheet. A molding fixture is provided on the outside of the stacked membrane sheet. The molding fixture cooperates with two adjacent barrier layers in the barrier layer group to form a casting cavity with an open top.

[0024] In one embodiment, the molding fixture is the outer shell of the filter membrane assembly, and the outer shell is retained after the casting material solidifies.

[0025] In one embodiment, after step S4, the following step is further included:

[0026] S5. Check the sealing performance of the filter membrane assembly. Attached Figure Description

[0027] Figure 1 A flowchart illustrating the manufacturing method of the filter membrane assembly provided by the present invention;

[0028] Figure 2 A schematic diagram of a filter membrane sheet provided by the present invention;

[0029] Figure 3 for Figure 1 Side view of the filter membrane in the image;

[0030] Figure 4 This is a schematic diagram of a filter membrane sheet being stacked in a molding fixture according to the present invention;

[0031] Figure 5 A schematic diagram of a filter head provided by the present invention;

[0032] Figure 6 A schematic diagram of a filter membrane assembly provided by the present invention;

[0033] Figure 7 A schematic diagram of a filtering component provided by the present invention;

[0034] Figure 8This is a schematic diagram of another filter membrane provided by the present invention;

[0035] Figure 9 for Figure 8 A schematic diagram showing the filter membrane sheets stacked within the forming fixture;

[0036] Figure 10 for Figure 9 A schematic diagram of another filtration membrane assembly made of stacked membrane sheets;

[0037] Figure 11 for Figure 10 A schematic diagram of a filter assembly made from a filter membrane component;

[0038] Figure 12 Another side view of the filter membrane body provided by the present invention;

[0039] Figure 13-a A side view of a stacked membrane sheet composed of identical filter membrane sheets provided by the present invention;

[0040] Figure 13-b A side view of a stacked membrane sheet composed of different filter membrane sheets provided by the present invention;

[0041] Figure 14-a A side view of a stacked membrane body composed of staggered layers of filter membrane bodies provided by the present invention;

[0042] Figure 14-b A side view of another type of laminated membrane sheet provided by the present invention, which is composed of staggered stacked membrane sheets;

[0043] Figure 15 This is a schematic diagram of another filter membrane assembly provided by the present invention.

[0044] in:

[0045] 10. Filter assembly; 20. Molding fixture;

[0046] 100. Laminated membrane sheet; 110. Filter membrane sheet; 111. Filter membrane; 112. Barrier layer assembly; 1121. Barrier layer;

[0047] 200. Casting cavity; 210. Casting material; 220. Semi-finished end cap;

[0048] 500, Filter membrane assembly; 510, Filter end cap; 600, Membrane box; 610, First housing; 620, Inlet;

[0049] 700. Water collection chamber. Detailed Implementation

[0050] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0051] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0056] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, an embodiment of the present invention provides a method for manufacturing a filter membrane module 500, comprising the following steps:

[0057] Step S1: Provide at least one filter membrane body 110. The filter membrane body 110 has at least two spaced-apart barrier layer groups 112. Each barrier layer group 112 includes at least two spaced-apart barrier layers 1121. In specific configuration, the number of filter membrane bodies 110 can be 1, 2, 3 or more. The at least three barrier layer groups 112 of the filter membrane body 110 along its length direction can be equally spaced. The number of barrier layer groups 112 can be 3, 5, 8, 10 or more. The number of barrier layers 1121 can be 2, 3 or more.

[0058] Step S2: A molding fixture 20 is provided on the outside of the filter membrane body 110. The molding fixture 20 cooperates with two adjacent barrier layers 1121 in the barrier layer group 112 to form a casting cavity 200 with an open top.

[0059] In specific configuration, the molding fixture 20 can be configured as a U-shaped structure. The inner surface of the molding fixture 20 fits the outer contour of the filter membrane body 110. The molding fixture 20 and two adjacent barrier layers 1121 in the same group form a casting cavity 200 with an open top. In order to ensure that the liquid poured later is better confined in the casting cavity 200 and to avoid leakage of the liquid casting material 210, the barrier layer 1121 is generally made of a soft material to achieve better sealing performance between the filter membrane body 110 and the molding fixture 20. Preferred materials for the barrier layer 1121 include silicone, ethylene-vinyl acetate, polyvinyl chloride, neoprene rubber, polyethylene, polystyrene, EPDM rubber, polyurethane, and elastic resin. The distance between the two barrier layers 1121 is equivalent to the width of the casting cavity 200. The preferred distance between them is 30mm-200mm, and the preferred width of a single barrier layer 1121 is 5mm-40mm.

[0060] Step S3: Inject casting material 210 into the casting cavity 200 to form at least two semi-finished end caps 220. Specifically, the casting material 210 is injected between two adjacent barrier layers 1121 in the same group. The liquid casting material 210 flows and distributes along the outer surface of the filter membrane 111 in the filter membrane body 110, filling the gaps between each filter membrane 111. Simultaneously, it connects with the barrier layers 1121 on both sides of the casting cavity 200, and is limited and blocked by the barrier layers 1121, allowing the liquid casting material 210 to flow within the casting cavity 200. It is easy to understand that the semi-finished end cap 220 includes the part cast into the casting cavity 200. The filter membrane 110, the barrier layer group 112 forming the casting cavity 200, and the casting material 210 are included in the casting process. During the casting process, the method of injecting the casting material 210 includes gravity flow injection, pressurized injection, etc. When the height of the U-shaped molding fixture 20 is not less than the height of the filter membrane 110 located in the molding fixture 20, the simpler gravity flow injection of the casting material 210 is preferred. After the casting is completed, all filter membranes 111 traverse each independent and non-communicating casting cavity 200. After the casting material 210 solidifies, if the molding fixture 20 is a special production fixture, the molding fixture 20 is removed after solidification.

[0061] Step S4: Cut the semi-finished end cap 220 to form at least one filter membrane assembly 500 with filter end caps 510 openings at both ends, where the filter membrane 111 in the filter end caps 510 is in an open state. With the above setup, the liquid casting material 210 flows and distributes along the outer surface of the filter membrane 111 in the filter membrane sheet 110, filling the gaps between each filter membrane 111. The casting process connects the filter membranes 111 in the filter membrane sheet 110 into a whole without changing the internal state of the filter membrane 111. This ensures that the filter membranes 111 at both ends of each cut filter membrane assembly 500 remain open, and that cutting the semi-finished end cap 220 does not result in excess, uncast, scattered filter membranes 111. The filter end caps 510 at both ends of the filter membrane assembly 500 are flush and smooth, facilitating subsequent assembly.

[0062] The manufacturing method of the above-mentioned filter membrane assembly 500 involves providing at least one filter membrane sheet 110, wherein the filter membrane sheet 110 has at least two spaced-apart barrier layer groups 112 to obtain a large number of filter membrane sheets 110 having barrier layer groups 112; then, in step S2, a molding jig 20 is provided on the outside of the filter membrane sheet 110, and the molding jig 20 cooperates with two adjacent barrier layers 1121 in the barrier layer group 112 to form a casting cavity 200 with a top opening to facilitate subsequent casting; and in step S3, the casting cavity 200 is filled with... In step S4, the semi-finished end caps 220 are formed by pouring in the casting material 210 to obtain a filter membrane 111 that is tightly bonded to each other. In step S4, the semi-finished end caps 220 are cut to form at least one filter membrane assembly 500 with filter end caps 510 at both ends, and the filter membrane 111 in the filter end caps 510 is in an open state. In the manufacturing method of the filter membrane assembly 500, this application improves the flatness of the filter end caps 510 by cutting the semi-finished end caps 220 to form at least one filter membrane assembly 500 with filter end caps 510 at both ends.

[0063] The two manufacturing methods mentioned in the back-off technology not only fail to guarantee the flatness of the filter end cap, but also make it difficult to ensure the appropriate distance between the barrier layer near the end of the filter membrane and the end of the filter membrane during actual production. When the distance between the barrier layer and the end of the membrane is too close, it is easy to block the opening on the end face of the membrane. When the distance between the barrier layer and the end of the membrane is too far, the hollow fiber membrane between the barrier layer and the end of the membrane has no filtration function, which can easily lead to the waste of hollow fiber membrane material. In addition, this section of hollow fiber membrane will also generate fluid flow resistance and pollution accumulation, which is not conducive to cleaning the filter membrane module. Moreover, both the first and second filter membrane module manufacturing methods mentioned above produce filter membrane modules individually, and cannot produce multiple filter membrane modules at one time, resulting in low production efficiency.

[0064] Based on this, in order to solve the problems of low production efficiency, easy clogging of the end face opening of the filter membrane, waste of filter membrane material, and inconvenience in cleaning the filter membrane module 500 in the current manufacturing process, a preferred embodiment is provided. The filter membrane body 110 has at least three spaced barrier layer groups 112. Casting material 210 is injected into the casting cavity 200 to form at least three semi-finished end caps 220. The semi-finished end caps 220 are cut to form at least two filter membrane modules 500 with filter end caps 510 at both ends. With the above configuration, the filter membrane body 110 has at least three spaced-apart barrier layer groups 112. It can be understood that most of the barrier layer groups 112 are located in the middle section of the filter membrane body 110, not at either end. Thus, the casting cavity 200 formed by two adjacent barrier layers 1121 in the barrier layer group 112 is located in the middle section of the filter membrane body 110. Therefore, during casting, the end face of the filter membrane body 110 can be prevented from being blocked. In addition, cutting the semi-finished end cap 220 not only ensures the flatness of the filter end cap 510, but also prevents the presence of excess uncast and scattered filter membranes 111, reducing material loss and waste.

[0065] The above-described method for manufacturing the filter membrane assembly 500 involves providing at least one filter membrane sheet 110, each having at least three spaced-apart barrier layer groups 112 to obtain a large number of filter membrane sheets 110 having barrier layer groups 112; then, a forming jig 20 is provided on the outside of the filter membrane sheet 110, the forming jig 20 cooperating with two adjacent barrier layers 1121 in the barrier layer group 112 to form a casting cavity 200 with an open top for subsequent casting; then, casting material 210 is injected into the casting cavity 200 to form at least three semi-finished end caps 220 to obtain filter membranes 111 that are tightly bonded together; finally, the semi-finished end caps 220 are cut to form at least two filter membrane assemblies 500 with openings at both ends; in this method of manufacturing the filter membrane assembly 500, compared to the previous method of providing barrier layers only at both ends of the membrane sheet, this method is significantly more efficient. This application, by setting a filter membrane body 110 with at least three spaced-apart barrier layer groups 112, such that most of the barrier layer groups 112 are located in the middle section of the filter membrane body 110, avoids the situation of easy blockage of the end face opening of the filter membrane body 110 when casting the casting cavity 200 formed between two adjacent barrier layers 1121 in the barrier layer group 112. Simultaneous cutting of at least three semi-finished end caps 220 can obtain multiple filter membrane assemblies 500 with flat filter end caps 510 at one time, improving production efficiency. Furthermore, the semi-finished end caps 220 are casting bodies in which the filter membranes 111 are bonded together by the casting material 210. Cutting them will not result in excess uncast and scattered filter membranes 111, avoiding waste of filter membrane 111 material and contamination of the end filter membrane 111 material. To efficiently obtain filter membrane assemblies 500 of the same specifications, in a preferred embodiment, in step S4, the membrane is cut along the centerline between two adjacent barrier layers 1121 in the same barrier layer group 112 to obtain filter membrane assemblies 500 with filter caps 510 at both ends, wherein the filter membrane 111 in the filter caps 510 is in an open state. This arrangement ensures that the filter membrane assemblies 500 obtained after cutting are all identical, facilitating batch processing and improving production efficiency.

[0066] It should be noted that a filter membrane assembly 500 is obtained by cutting along the two barrier layers 1121 of each of the two adjacent barrier layer groups 112. The filter membranes 111 at both ends of the filter membrane assembly 500 are cast into a single filter end cap 510, and the whole is in a cast state. There is no excess uncast filter membrane 111 material at its ends. The casting process connects the filter membranes 111 into a whole without changing the internal state of the filter membranes 111. Thus, the filter membranes 111 in the filter end caps 510 at both ends of each cut filter membrane assembly 500 maintain their original open state.

[0067] When using the filter membrane assembly 500, the filter caps 510 at both ends of the filter membrane assembly 500 need to be installed with membrane boxes 600 having water collection chambers 700 to form the filter assembly 10, and the filter membrane 111 in the filter membrane assembly 500 is connected to the water collection chamber 700. In a specific configuration, the membrane box 600 includes a first housing 610 and an inlet 620. The first housing 610 is a cavity structure with one open end. The inlet 620 is located at the non-open end of the first housing 610 and communicates with the cavity of the first housing 610. The inlet 620 is used to input an external water source, thereby making the cavity of the first housing 610 a water collection chamber 700. When a filter head 510 is sealed and connected inside the cavity of the first housing 610, the filter membrane 111 communicates with the water collection chamber 700, allowing the filter membrane assembly 500 to perform filtration. In the process of sealing the first housing 610 and the filter head 510, a ring of sealant or a sealing ring can be provided on the inside of the first housing 610 before being placed on the filter head 510.

[0068] Combination Figure 8 and Figure 9 As shown, in order to strengthen the bond between the filter membranes 111, in a preferred embodiment, in step S1, the barrier layer group 112 includes three spaced-apart barrier layers 1121. Specifically, the three barrier layers 1121 are equally spaced, and each barrier layer 1121 wraps around all the filter membranes 111 and fills the gaps between adjacent filter membranes 111 to form a whole. In the subsequent preparation, each pair of adjacent barrier layers 1121 in the barrier layer group 112 cooperates with the molding fixture 20 to form a casting cavity 200 with an open top. Thus, the three barrier layers 1121 in one barrier layer group 112 will form two casting cavities 200 with open tops. The presence of the intermediate barrier layer 1121 restricts the flow of the casting material 210, preventing the two casting cavities 200 from communicating. When injecting the casting material 210, it is injected into both casting cavities 200.

[0069] Combination Figure 10 and Figure 11As shown, to obtain a filter head 510 with a barrier layer 1121, specifically, in step S4, the filter head 510 is cut along the width of the barrier layer 1121 located in the middle of the same barrier layer group 112. Through the above setup, at least one filter membrane assembly 500 with filter heads 510 at both ends is obtained, wherein the filter membrane 111 in the filter head 510 is open and the outer end of the filter head 510 has a barrier layer 1121. It should be noted that each filter head 510 has two spaced-apart barrier layers 1121, and the space between these two barrier layers 1121 is filled with casting material 210. When the membrane box 600 and the filter head 510 are sealed to obtain the filter assembly 10, specifically when the filter head 510 is installed in the first housing 610, the outer end face of the filter head 510 has a certain amount of barrier layer 1121, and the barrier layer 1121 forms a seal with the inner wall of the first housing 610.

[0070] To obtain multiple filter membrane assemblies 500 of the same specifications simultaneously, more specifically, the membrane is cut along the center line of the barrier layer 1121 located in the middle of the same barrier layer group 112. This arrangement ensures that the filter membrane assemblies 500 obtained after cutting are all identical, facilitating batch processing and improving production efficiency.

[0071] Combination Figure 12 As shown, in order to facilitate the formation of the filter membrane arrangement, a preferred embodiment includes the following steps in step S1:

[0072] Step S11: Provide multiple filter membranes 111. In specific settings, it is necessary to ensure that the filter membranes 111 have sufficient length for subsequent cutting. When manufacturing filter membrane assembly 500 on the production line, the length of the filter membranes 111 is limited by the range of filter membranes 111 that can be stretched on the production line.

[0073] Step S12: Arrange multiple filter membranes 111 in a single layer or multiple layers in parallel and spaced intervals to form a filter membrane arrangement. In specific configuration, the filter membrane arrangement can be a single layer structure composed of multiple filter membranes 111, or a multi-layer structure composed of multiple filter membranes 111. The more layers there are, the higher the filling density of the filter membranes 111, and the less barrier layer 1121 is required. However, when there are too many layers, the difficulty of arranging the filter membranes 111 neatly increases. The preferred number of layers in the filter membrane arrangement is 1 to 5 layers. The number of filter membranes 111 in each layer of the multi-layer filter membrane arrangement can be the same or different.

[0074] Step S13: At least two barrier layer groups are spaced apart along the length of the filter membrane arrangement to form a filter membrane sheet 110. In specific configurations, the barrier layer 1121 is generally formed using hot melt adhesive. Specifically, hot melt adhesive is applied to the filter membrane array, so that each barrier layer 1121 wraps all the filter membranes 111 and fills the gaps between adjacent filter membranes 111 to form a whole, namely the filter membrane sheet 110. Alternatively, pre-prepared strip-shaped solid adhesive can be used. The strip-shaped solid adhesive is placed on the filter membrane array and then heated to liquefy the adhesive, wrapping all the filter membranes 111 and filling the gaps between adjacent filter membranes 111 to form a whole. The specific number of barrier layer groups 112 is limited by the length of the filter membrane array. The distance between two adjacent barrier layer groups 112 is the length of one filter membrane assembly 500. The longer the filter membrane 111, the longer the filter membrane array, and the more barrier layer groups 112 are set, the more filter membrane assemblies 500 can be produced per batch, and the higher the production efficiency.

[0075] Combination Figure 13-a , Figure 13-b , Figure 14-a and Figure 14-b As shown, in order to obtain various filter membrane modules 500, a preferred embodiment includes the following steps in steps S1 and S2:

[0076] Multiple filter membrane sheets 110 are provided. In specific settings, the number and number of filter membranes 111 in each filter membrane sheet 110 can be the same or different.

[0077] S32. Multiple filter membrane sheets 110 are stacked, and two adjacent barrier layers 1121 along the stacking direction of the multiple filter membrane sheets 110 are bonded to obtain a stacked membrane sheet 100. A molding fixture 20 is provided on the outside of the stacked membrane sheet 100. The molding fixture 20 cooperates with two adjacent barrier layers 1121 in the barrier layer group 112 to form a casting cavity 200 with an open top. In specific settings, during the process of forming the laminated membrane body 100 from the filter membrane body 110, different filter membrane body 110 structures can be selected and combined to obtain laminated membrane bodies 100 with different cross-sections. The cross-section of the laminated membrane body 100 can be square, rectangular, circular, trapezoidal, triangular, or other polygonal shapes. Different cross-sections of the laminated membrane body 100 can form different types of filter membrane modules 500. For example, the end face of the filter head 510 of the common curtain-type submerged membrane module is rectangular, the end face of the filter head 510 of the column-type submerged membrane module is circular or square, and the end face of the filter head 510 of the column-type pressure membrane module is circular.

[0078] During the formation of the laminated membrane sheet 100, each filter membrane sheet 110 can be stacked sequentially, or multiple filter membrane sheets 110 can be laid horizontally for a certain length before being stacked. When each layer of filter membrane sheet 110 is stacked, it is necessary to cover all the barrier layers 1121 of the next layer one by one. When stacking each layer of filter membrane sheet 110, the filter membranes 111 in the filter membrane sheet 110 can be stacked vertically facing each other, or they can be stacked in a staggered manner. Staggered stacking can achieve a higher filling density in a limited space while keeping the thickness of the barrier layer 1121 between the upper and lower filter membrane sheets 110 unchanged. After the stacking is completed, the barrier layer 1121 of the uppermost filter membrane sheet 110 can be squeezed by a squeezing jig to make the barrier layers 1121 of each layer contact each other and form a seal, or a layer of filter membrane sheet 110 can be placed and the barrier layer 1121 squeezed to form a seal.

[0079] After the casting cavity 200 is formed by stacking, gravity injection or pressurized injection can be used for casting. Gravity injection requires simple production equipment. When the height of the U-shaped molding fixture 20 is not less than the height of the stacked membrane 100 located in the molding fixture 20, the simpler gravity flow injection casting material 210 is preferred. The operation sequence can be to cast after all the filter membranes 110 are stacked, or to cast quantitatively after each layer of filter membranes 110 is stacked. Multiple quantitative castings can reduce the risk of heat accumulation during the curing process of some types of casting materials 210, which may lead to poor casting.

[0080] Combination Figure 15 As shown, the current molding fixture 20 is a dedicated production fixture. It cannot be disassembled while the casting material 210 is still uncured, and needs to be disassembled after the casting material 210 has cured. Furthermore, due to the curing time of the casting material 210, a large number of dedicated production fixtures are required for batch casting. To improve efficiency and save costs, in a preferred embodiment, the molding fixture 20 serves as the outer shell of the filter membrane assembly 500, and the outer shell is retained after the casting material 210 has solidified. With this configuration, by using the outer shell of the filter membrane assembly 500 as the molding fixture 20, the outer shell can function as a component of the filter membrane assembly 500 after the casting material 210 has cured without disassembly, thus eliminating the cost of manufacturing dedicated production fixtures and achieving improved efficiency and cost savings.

[0081] For example, when the molding fixture 20 is a semi-circular shell, in order to better integrate the laminated membrane body 100 with the molding fixture 20, the cross-section of the laminated membrane body 100 formed by the filter membrane body 110 is also approximately semi-circular; and with the above settings, when the casting material 210 in the casting cavity 200 is cut after curing, multiple filter membrane assemblies 500 with open ends, semi-circular cross-sections and semi-circular shells can be obtained. Two identical filter membrane assemblies 500 are joined together in a one-to-one correspondence with filter heads 510, and then the two filter membrane assemblies 500 are directly bonded with sealing material, or embedded in a circular part and bonded to form a filter membrane assembly 500 with two circular filter heads 510. Then the membrane box 600 is sealed and bonded to the circular filter heads 510 to form a cylindrical filter assembly 10.

[0082] The manufacturing method of the filter membrane assembly 500 provided in this application is applicable to various types of filter membranes 111, which can be any of hollow fiber membranes, tubular membranes, and flat sheet membranes. In specific settings, when the filter membrane 111 is a flexible filter membrane such as a hollow fiber membrane or a flat sheet membrane, it can be wound and stored in a storage device such as a reel, roll, or drum, and then pulled and unwound to form a filter membrane arrangement. Alternatively, it can be conveyed by a conveying mechanism to form a filter membrane arrangement according to its original length. When the filter membrane 111 is a rigid filter membrane such as a tubular membrane, the filter membrane 111 can be placed on a shelf and then moved horizontally to the destination to form a filter membrane arrangement.

[0083] To ensure the quality of the prepared filter membrane module 500, in a preferred embodiment, after step S4, the following step is further included:

[0084] Step S5: Test the sealing performance of the filter membrane assembly 500. In the specific setup, first install the filter membrane assembly 500 and the membrane box 600 to form the filter assembly 10, and then completely submerge the filter assembly 10 in water. At this time, one of the water inlets 620 on the membrane boxes 600 at both ends of the filter assembly 10 is blocked. Compressed air of a certain pressure is input from the other water inlet 620. If no bubbles are generated on the water surface, then the sealing performance of the filter membrane assembly 500 and the filter assembly 10 meets the production standards.

[0085] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A method of manufacturing a filtration membrane module, characterized by, The method comprises the following steps: S1, providing at least one filter membrane piece, the filter membrane piece having at least three groups of barrier layers arranged at intervals, each group of barrier layers comprising three barrier layers arranged at intervals; S2, arranging a forming jig outside the filter membrane piece, the forming jig cooperating with two adjacent barrier layers in the group of barrier layers to form a top-open pouring cavity; S3, pouring a casting material into the pouring cavity to form at least three semi-finished end caps; S4, cutting along the center line of the barrier layer in the middle position of the same group of barrier layers to form at least two filter membrane assemblies each having filter end caps, the filter membrane in the filter end cap being in an open state.

2. The method of manufacturing a filtration membrane module according to claim 1, wherein In the step S4, the cutting is performed along the center line between the two adjacent barrier layers in the same group of barrier layers.

3. The method of manufacturing a filtration membrane module according to claim 1, wherein In the step S4, the cutting is performed within the width range of the barrier layer in the middle position of the same group of barrier layers.

4. The method of manufacturing a filtration membrane module according to claim 1, wherein In the step S1, the method comprises the following steps: S11, providing a plurality of filter membranes; S12, arranging the plurality of filter membranes at intervals and in parallel to form a filter membrane arrangement body in a single layer or multiple layers; S13, covering the filter membrane arrangement body with at least three groups of barrier layers at intervals along the length direction of the filter membrane arrangement body to form the filter membrane piece.

5. The method of manufacturing a filtration membrane module according to claim 1, wherein In the steps S1 and S2, the method comprises the following steps: providing a plurality of filter membrane pieces; stacking the plurality of filter membrane pieces, bonding two adjacent barrier layers in the stacking direction of the plurality of filter membrane pieces to obtain a stacked membrane piece, and arranging the forming jig outside the stacked membrane piece, the forming jig cooperating with two adjacent barrier layers in the group of barrier layers to form the top-open pouring cavity.

6. The method of manufacturing a filtration membrane module according to claim 1, wherein The forming jig is a shell of the filter membrane assembly, and remains after the casting material solidifies.

7. The method of manufacturing a filtration membrane module according to any one of claims 1 to 6, characterized in that, After the step S4, the method further comprises the following step: S5, detecting the sealing property of the filter membrane assembly.

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