Multi-channel filtering membrane bag

Abstract

The invention relates to the technical field of membrane separation, and discloses a multi-channel filtering membrane bag which comprises a membrane bag body, and the membrane bag body at least comprises a first functional unit, a material channel layer and a second functional unit which are sequentially stacked in the thickness direction; the first functional unit comprises two first functional film layers which are oppositely arranged and a first supporting flow guide layer located in the middle, and the first functional unit is formed by welding in advance; the second functional unit comprises two second functional film layers which are oppositely arranged and a second supporting flow guide layer located between the two second functional film layers, and the second functional unit is formed by welding in advance; the first functional unit, the material channel layer and the second functional unit are provided with mutually aligned communicating hole sites, and are connected in a peripheral sealing manner to form an integral membrane bag structure, so that different functional membrane layers and a material flowing area form an integrated structure, and various treatment processes such as filtration, concentration, cleaning or gas transfer and the like can be realized in the same membrane bag; therefore, the functional integration level of the membrane module is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of filter membranes, and more specifically, relates to a multi-channel filter membrane package. Background Technology

[0002] Membrane separation technology is widely used in biopharmaceuticals, fine chemicals, food processing, and environmental protection to achieve processes such as material filtration, concentration, purification, and gas-liquid separation. In practical applications, membrane modules or membrane packs are often used to combine membrane sheets with flow guide layers to form filtration units, and multi-layer stacking is used to improve processing efficiency and flux.

[0003] Existing membrane envelope structures are typically assembled on-site from multiple layers of membrane sheets and supporting flow guiding structures. The functional layers are often connected by simple stacking or overall compression, resulting in low structural integration and a relatively simple arrangement of different fluid channels. When multiple functions such as material filtration, cleaning and purification, or gas transfer need to be achieved simultaneously within the same membrane envelope, it is often necessary to use external piping or multiple membrane modules, leading to complex equipment structures, large space occupation, difficulty in controlling fluid paths, and poor assembly consistency.

[0004] In addition, existing membrane modules are mostly designed with single-channel or regular repeating channel structures in terms of fluid pathways, which makes it difficult to flexibly arrange the flow paths of different functional fluids according to process requirements. This is not conducive to achieving multi-channel synergistic filtration within a limited space, thus limiting the integration level and processing efficiency of membrane modules to a certain extent.

[0005] Therefore, how to provide a filter membrane pack structure with high structural integration, flexible fluid pathway arrangement, and the ability to achieve multiple filtration or mass transfer functions within the same membrane pack has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] This invention provides a multi-channel filter membrane pack to overcome the above-mentioned defects in the prior art.

[0007] The purpose and efficacy of the multi-channel filtration membrane pack of this invention are achieved by the following specific technical means: A multi-channel filtration membrane pack includes a membrane pack body, wherein the membrane pack body includes at least a first functional unit, a material channel layer and a second functional unit that are sequentially stacked along the thickness direction; The first functional unit includes two opposing first functional membrane layers and a first support and flow guiding layer located in the middle, and the first functional unit is formed by pre-welding; The second functional unit includes two opposing second functional membrane layers and a second support and flow guiding layer located in the middle, and the second functional unit is formed by pre-welding; The first functional unit, the material channel layer, and the second functional unit are provided with mutually aligned connecting holes and are connected by an external seal to form an integral membrane structure.

[0008] In a further technical solution, the material channel layer is a mesh flow guiding structure layer, a spacer support layer, or a filter layer.

[0009] In a further technical solution, both the first functional unit and the second functional unit are formed by ultrasonic welding or hot melt welding, so that the first functional unit and the second functional unit become prefabricated modules.

[0010] In a further technical solution, the connecting holes are located at both ends of each layer of the membrane body, and the connecting holes in the corresponding layers are aligned and connected along the thickness direction to form fluid passages corresponding to different fluids.

[0011] In a further technical solution, the connecting holes respectively form a first functional passage, a material passage, and a second functional passage in the corresponding layers; The first functional pathway is connected to the first functional unit, the material pathway is connected to the material channel layer, and the second functional pathway is connected to the second functional unit.

[0012] In a further technical solution, both the first functional membrane layer and the second functional membrane layer are hydrophilic membranes; the first functional passage is used to introduce auxiliary liquid, and the second functional passage is used to export filtrate, so that the target material in the material passage is cleaned and purified during the concentration process.

[0013] In a further technical solution, the first functional membrane layer is a hydrophobic membrane, and the second functional membrane layer is a hydrophilic membrane; The first functional passage is used for vacuuming, and the second functional passage is used for discharging the filtrate to remove gas from the target material during the filtration process; or, the first functional passage is used for introducing gas, and the second functional passage is used for discharging the filtrate to increase the gas content in the filtrate during the filtration process.

[0014] In a further technical solution, the membrane package body includes at least two sets of the first functional unit and the second functional unit, the first functional unit and the second functional unit are alternately arranged, and the material channel layer is provided between adjacent functional units.

[0015] A further technical solution is that each layer of the membrane body is provided with multiple sets of interconnecting holes arranged in a uniform manner, and each functional unit and material channel layer selectively connects to different sets of interconnecting holes, so that the fluid passages are staggered in the thickness direction of the membrane body.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention integrates different functional membrane layers with the material flow area by arranging a first functional unit, a material channel layer, and a second functional unit along the thickness direction within the membrane package body. This facilitates the realization of multiple processing steps such as filtration, concentration, cleaning, or gas transfer within the same membrane package, thereby improving the functional integration of the membrane module. The first and second functional units adopt a modular structure formed by pre-welding, which can improve the assembly stability and overall sealing performance between functional layers, reduce on-site assembly errors, and improve the consistency and reliability of the membrane package structure.

[0017] By setting multiple sets of interconnecting pores within the membrane module and selectively connecting different functional units and material channel layers to different pore sets, the fluid pathways can be staggered in the thickness direction, thus forming a multi-channel parallel filtration system within a limited structural space, which is beneficial to improving the processing capacity per unit volume. By rationally configuring the hydrophilic and hydrophobic properties of the functional membrane layers and the working mode of the functional pathways, multiple process functions such as material cleaning and purification, degassing, or gas transfer can be achieved within the same membrane module, thereby broadening the application scenarios of membrane modules and improving process flexibility. Attached Figure Description

[0018] Figure 1 This is an exploded view of the multilayer membrane structure in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the multilayer membrane structure after being spread out in Embodiment 1 of the present invention; Figure 3 This is an exploded view of the multilayer membrane structure in Embodiment 2 of the present invention; Figure 4 This is a schematic diagram of the multilayer membrane structure after being spread out in Embodiment 2 of the present invention; Figure 5 This is a schematic diagram of the overall structure in Embodiment 3 of the present invention; Explanation of reference numerals in the attached figures: First functional unit 1, first membrane 101, first support and guide layer 102, second membrane 103; Material channel layer 2; Second functional unit 3, third membrane 301, second support and guide layer 302, fourth membrane 303; Hole 401, Hole 402, Hole 403, Hole 404, Hole 405, Hole 406; The first left hole 511, the second left hole 505, the third left hole 501, the fourth left hole 507, the fifth left hole 513, the sixth left hole 509, and the seventh left hole 503; Right hole 1: 502; Right hole 2: 506; Right hole 3: 512; Right hole 4: 508; Right hole 5: 504; Right hole 6: 510; Right hole 7: 514. Detailed Implementation

[0019] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0020] This invention provides a multi-channel filter membrane pack, which is described below with reference to the appendix of the specification. Figures 1-5 The specific embodiments of the present invention will be further described below. Example 1

[0021] Please see the appendix Figures 1-2 In this embodiment, the membrane package body includes a first functional unit 1, a material channel layer 2, and a second functional unit 3, which are stacked sequentially along the thickness direction.

[0022] The first functional unit 1 includes two opposing first functional film layers and a first support and flow guiding layer 102 located in the middle. The first functional unit 1 is formed by pre-welding. In this embodiment, the first functional film layer may specifically include a first film 101 and a second film 103.

[0023] The second functional unit 3 includes two opposing second functional membrane layers and a second support and flow guiding layer 302 located in the middle. The second functional unit 3 is formed by pre-welding. In this embodiment, the second functional membrane layer may specifically include a third membrane 301 and a fourth membrane 303.

[0024] In this embodiment, both the first support and flow guiding layer 102 and the second support and flow guiding layer 302 can be formed using a mesh support with a certain porosity and structural strength. This serves to create a stable fluid flow space between the corresponding functional membrane layers and to provide support for the membrane layers, preventing them from collapsing or sticking together under fluid pressure. The support and flow guiding layer can be a plastic mesh structure layer, a corrugated support layer, a fiber support pad layer, or other spacer structures with flow guiding functions.

[0025] In other embodiments of this application, the first functional membrane layer and the second functional membrane layer may be selected from different materials or pore structures according to processing requirements, such as microfiltration membranes, ultrafiltration membranes, nanofiltration membranes or gas selective permeation membranes, so that the membrane pack can be adapted to different material separation or gas exchange processes.

[0026] The first functional unit 1, the material channel layer 2, and the second functional unit 3 are provided with mutually aligned connecting holes and are connected by an external seal to form an integral membrane structure.

[0027] During use, the target material can flow within the material channel layer 2, and the functional fluid forms corresponding functional pathways through the first functional unit 1 and the second functional unit 3, achieving mass transfer or separation under membrane separation. By configuring the characteristics of different functional membrane layers and adjusting the working mode of the functional pathways, multiple processing processes such as material filtration, concentration, cleaning and purification, or gas transfer can be achieved within the same membrane package. Because each functional unit adopts a prefabricated welded structure and forms a multi-channel fluid path through interconnecting holes, it not only helps to improve the overall structural stability and sealing reliability of the membrane package, but also enables multi-fluid synergy within a limited structural space, thereby improving the processing efficiency and applicability of the membrane package.

[0028] Preferably, the material channel layer 2 is a mesh flow guiding structure layer, a spacer support layer, or a filter layer.

[0029] In this embodiment, the material channel layer 2 is used to form the main flow space of the target material. The material flows in the layer along the length of the membrane package and interacts with the membrane layers in the first functional unit 1 and the second functional unit 3 during the flow.

[0030] In other embodiments of this application, the structure of the material channel layer 2 can be adjusted according to flow requirements and pressure drop requirements, for example, by using different mesh sizes, different support heights, or setting up turbulence structures to improve the flow uniformity and mass transfer efficiency of materials in the membrane.

[0031] Preferably, both the first functional unit 1 and the second functional unit 3 are formed by ultrasonic welding or hot melt welding, so that the first functional unit 1 and the second functional unit 3 become prefabricated modules.

[0032] Preferably, the connecting holes are located at both ends of each layer of the membrane body, and the connecting holes in the corresponding layers are aligned and connected along the thickness direction to form fluid passages corresponding to different fluids.

[0033] In this embodiment, the connecting holes form a uniform arrangement in each layer of the membrane body, and the layers are connected to form a whole through the outer sealing structure, so that different functional fluids can enter the corresponding layers and flow along the predetermined path.

[0034] In other embodiments of this application, the connecting holes in different layers can be selectively connected or closed to form multiple sets of staggered fluid pathways inside the membrane pack, thereby achieving a combination of multiple separation or processing functions in the same membrane pack structure.

[0035] Preferably, the connecting holes are respectively formed in the corresponding layers as: a first functional passage, a material passage, and a second functional passage; the first functional passage is connected to the first functional unit 1, the material passage is connected to the material channel layer 2, and the second functional passage is connected to the second functional unit 3.

[0036] Please see the appendix Figures 1-2 In one embodiment, the membrane package body has a small width and only one set of functional unit structures, including a first functional unit 1, a material channel layer 2, and a second functional unit 3. Specifically, the first functional unit 1 includes a first membrane 101, a first support and flow guiding layer 102, and a second membrane 103; the second functional unit includes a third membrane 301, a second support and flow guiding layer 302, and a fourth membrane 303.

[0037] refer to Figure 2 Each membrane structure has three pairs of interconnecting holes. The upper left and lower right corners of the first support and flow guiding layer 102 are the first hole 401 and the second hole 402, respectively. The fluid passes through the first hole 401 and the second hole 402 to form the first functional pathway.

[0038] The left and right middle holes of the material channel layer 2 are the third hole 403 and the fourth hole 404, respectively. The fluid passes through the third hole 403 and the fourth hole 404 to form a material passage.

[0039] The lower left and upper right corners of the second support guide layer 302 are defined as the fifth hole 405 and the sixth hole 406, respectively. The fluid passes through the fifth hole 405 and the sixth hole 406 in sequence to form a second functional passage that intersects with the first functional passage.

[0040] By using diagonally arranged fluid pathways, the functional fluid forms an extended flow path inside the membrane, thereby increasing the contact time with the material and improving mass transfer efficiency. Example 2

[0041] Please see the appendix Figure 3 and Figure 4 In this embodiment, the width of the membrane package body is increased, and each layer of the structure has seven pairs of connecting holes on the left and right sides. The connecting holes of the membrane package body are distributed along the length direction on opposite sides, and the distribution of the connecting holes is as follows: The left connecting holes are defined in the following order from top to bottom: left hole 1 511, left hole 2 505, left hole 3 501, left hole 4 507, left hole 513, left hole 6 509, and left hole 7 503. The connecting holes on the right side are defined in the following order from top to bottom: right hole 1 502, right hole 2 506, right hole 3 512, right hole 4 508, right hole 504, right hole 6 510, and right hole 7 514.

[0042] The connectivity between the aforementioned connecting holes and each layer is as follows: The connecting holes through which the fluid flows on the first support guide layer 102 are as follows: left three holes 501, right one hole 502, left seven holes 503, and right five holes 504. The connecting holes through which the fluid flows on material channel layer 2 are as follows: left second hole 505, right second hole 506, left fourth hole 507, right fourth hole 508, left sixth hole 509, and right sixth hole 510; The connecting holes through which the fluid flows on the second support guide layer 302 are as follows: left hole 1 511, right hole 3 512, left hole 513, and right hole 7 514.

[0043] Thus, two sets of first functional pathways are formed in the first functional unit 1, three sets of material pathways are formed in the material channel layer 2, and two sets of second functional pathways are formed in the second functional unit 3, thereby forming multiple sets of parallel fluid paths in the width direction of the membrane body.

[0044] Preferably, both the first functional membrane layer and the second functional membrane layer are hydrophilic membranes; the first functional passage is used to introduce auxiliary liquid, and the second functional passage is used to export filtrate, so that the target material in the material passage is cleaned and purified during the concentration process.

[0045] In this embodiment, when the first functional passage is circulated with auxiliary liquid and the second functional passage is used to export filtrate, the target material can achieve the effect of simultaneous concentration and cleaning and purification during its flow in the material channel layer.

[0046] Preferably, the first functional membrane layer is a hydrophobic membrane, and the second functional membrane layer is a hydrophilic membrane; the first functional passage is used for vacuuming, and the second functional passage is used for discharging the filtrate to remove gas from the target material during the filtration process; or, the first functional passage is used for introducing gas, and the second functional passage is used for discharging the filtrate to increase the gas content in the filtrate during the filtration process.

[0047] In this embodiment, when the first functional passage is used for vacuuming or introducing gas, the gas components in the target material can be removed or adjusted during the filtration or separation process, thereby expanding the application scenarios of membrane packaging.

[0048] Preferably, the membrane package body includes at least two sets of the first functional unit and the second functional unit, the first functional unit and the second functional unit are arranged alternately, and the material channel layer is provided between adjacent functional units.

[0049] Preferably, each layer of the membrane body has multiple sets of interconnecting holes arranged in a uniform manner, and each functional unit and material channel layer selectively connects to different sets of interconnecting holes, so that the fluid passages are staggered in the thickness direction of the membrane body. Example 3

[0050] Please see the appendix Figure 5 In this embodiment, the first functional unit 1 and the second functional unit 3 are alternately arranged, and the material channel layer 2 is arranged between the first functional unit 1 and the second functional unit 3.

[0051] In this embodiment, the membrane package body includes, from top to bottom, a first functional unit 1, a material channel layer 2, a second functional unit 3, a material channel layer 2, a first functional unit 1, a material channel layer 2, and a second functional unit 3.

[0052] In this embodiment, since the fluid pathways formed by different functional units and material channel layers are staggered in the thickness direction of the membrane pack, the functional fluid forms a multi-level cross-layer mass transfer path inside the membrane pack, thereby achieving continuous separation within a single membrane pack structure.

[0053] With the above structural arrangement, the target material can exchange substances with multiple functional membrane layers in sequence during the flow process, so that the membrane package forms a cascade separation effect, thereby improving separation efficiency and processing capacity without significantly increasing the equipment volume.

[0054] Meanwhile, the staggered arrangement of multiple fluid pathways can improve the flow field distribution inside the membrane pack, making the functional fluid action area more uniform, which helps to reduce local concentration polarization, thereby improving the stability and service life of the membrane separation process.

[0055] Furthermore, in this embodiment, the number of layers of the membrane body can be further increased, and the functional pathways formed in different layers can selectively connect to the connecting pores at different locations, so that the fluid pathways are periodically staggered in the thickness direction of the membrane body, thereby forming a multi-level separation or multi-functional synergistic processing structure.

[0056] In summary, this application integrates multiple processing functions within a limited structural space by setting up functional units and material channel layers stacked along the thickness direction in the membrane body and forming stable functional modules through prefabricated welding structures. At the same time, by utilizing the selective connectivity of the connecting holes, different fluids form multi-channel interleaved fluid paths inside the membrane body.

[0057] Compared to traditional membrane packs that only form a single or simple parallel flow channel, this application can achieve the synergistic performance of multiple processes such as filtration, concentration, cleaning, or gas transfer within the same membrane pack. This not only improves fluid processing efficiency but also enhances the stability and applicability of the membrane pack structure.

[0058] Furthermore, by flexibly configuring the number of functional units, the arrangement of fluid pathways, and the type of membrane layer, multi-stage separation or multi-functional coupled processing structures can be constructed according to different process requirements, thereby further improving the overall performance of the membrane separation system. Through the aforementioned flow channel arrangement, the processing flow rate can be increased without significantly increasing the space occupied by the membrane pack, and different functional fluids can form a more uniform action area within the membrane pack, thereby further improving membrane separation efficiency and system operational stability.

[0059] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A multi-channel filter membrane pack, characterized in that: The membrane package body includes at least a first functional unit, a material channel layer, and a second functional unit that are stacked sequentially along the thickness direction. The first functional unit includes two opposing first functional membrane layers and a first support and flow guiding layer located in the middle, and the first functional unit is formed by pre-welding; The second functional unit includes two opposing second functional membrane layers and a second support and flow guiding layer located in the middle, and the second functional unit is formed by pre-welding; The first functional unit, the material channel layer, and the second functional unit are provided with mutually aligned connecting holes and are connected by an external seal to form an integral membrane structure.

2. The multi-channel filter membrane pack as described in claim 1, characterized in that, The material channel layer is a mesh flow guiding structure layer, a spacer support layer, or a filter layer.

3. The multi-channel filter membrane pack as described in claim 1, characterized in that, Both the first functional unit and the second functional unit are formed by ultrasonic welding or hot melt welding, so that the first functional unit and the second functional unit become prefabricated modules.

4. A multi-channel filter membrane pack as described in claim 1, characterized in that, The connecting holes are located at both ends of each layer of the membrane body, and each connecting hole in the corresponding layer is aligned and connected along the thickness direction to form fluid passages corresponding to different fluids.

5. A multi-channel filter membrane pack as described in claim 4, characterized in that, The connecting holes respectively form a first functional passage, a material passage, and a second functional passage in the corresponding layers; The first functional pathway is connected to the first functional unit, the material pathway is connected to the material channel layer, and the second functional pathway is connected to the second functional unit.

6. A multi-channel filter membrane pack as described in claim 1, characterized in that, Both the first functional membrane layer and the second functional membrane layer are hydrophilic membranes; the first functional passage is used to introduce auxiliary liquid, and the second functional passage is used to export filtrate, so that the target material in the material passage is cleaned and purified during the concentration process.

7. A multi-channel filter membrane pack as described in claim 1, characterized in that, The first functional membrane layer is a hydrophobic membrane, and the second functional membrane layer is a hydrophilic membrane; The first functional passage is used for vacuuming, and the second functional passage is used for discharging the filtrate to remove gas from the target material during the filtration process; or, the first functional passage is used for introducing gas, and the second functional passage is used for discharging the filtrate to increase the gas content in the filtrate during the filtration process.

8. A multi-channel filter membrane pack as described in claim 1, characterized in that, The membrane package body includes at least two sets of the first functional unit and the second functional unit, the first functional unit and the second functional unit are arranged alternately, and the material channel layer is provided between adjacent functional units.

9. A multi-channel filter membrane pack as described in claim 5, characterized in that, Each layer of the membrane body has multiple sets of interconnecting holes arranged in a uniform manner. Each functional unit and material channel layer selectively connects to different sets of interconnecting holes, so that the fluid pathways are staggered in the thickness direction of the membrane body.

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