Hollow fiber nanofiltration composite membrane system

Abstract

The utility model discloses a hollow fiber nanofiltration composite membrane system. The hollow fiber nanofiltration composite membrane system comprises a composite membrane body and clamping holes formed in the inner side of the composite membrane body, when the hollow fiber nanofiltration composite membrane system is used, the hollow fiber nanofiltration composite membrane system is firstly installed on the water purification equipment through the clamping holes, the hollow fiber nanofiltration composite membrane is prepared by adopting a multi-layer supporting structure, and a filter element is used as an internal supporting layer of the hollow fiber nanofiltration composite membrane in the hollow fiber nanofiltration composite membrane; according to the hollow fiber nanofiltration composite membrane system, the outer filtering layer and the inner filtering layer are arranged on the outer layer surface and the inner layer surface of the filtering element, and finally, the desalting layer and the membrane base layer are arranged on the inner sides of the outer filtering layer and the filtering element, so that the combination property of the hollow fiber nanofiltration composite membrane system is improved due to the arrangement of the multi-layer structure, and pollutants can be effectively captured and isolated; by arranging the hollow fiber nanofiltration composite membrane, pollutants are prevented from penetrating through the whole membrane structure, and by arranging the membrane base layer, the hydrophilicity, the water permeability and the pollution resistance of the hollow fiber nanofiltration composite membrane system can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to sewage treatment, and specifically relates to a hollow fiber nanofiltration composite membrane system. Background Art

[0002] Hollow fiber nanofiltration composite membrane is a special membrane filtration equipment, which is mainly composed of hollow fiber and nanofiltration composite membrane. Hollow fiber is a fine tubular structure, its internal cavity is used as a fluid channel, and the outer wall is used as a filter medium. The nanofiltration composite membrane forms one or more layers of film on the outer surface of the hollow fiber, which can effectively block the passage of certain substances, thereby achieving the purpose of filtration. Hollow fiber nanofiltration composite membrane is mainly used in water treatment, sewage treatment, chemical industry, food, medicine and other fields. It can effectively remove impurities, bacteria, viruses, heavy metal ions and other harmful substances in water, so that the water quality is significantly improved. The existing hollow fiber nanofiltration composite membrane system is mainly composed of a composite membrane body, a filter core, a filter inner layer, a filter outer layer, a card hole and other components. The existing hollow fiber nanofiltration composite membrane system will affect the filtration effect due to its weak hydrophilicity, water permeability and anti-fouling properties when in use, so a hollow fiber nanofiltration composite membrane system is indispensable. Utility Model Content

[0003] The utility model aims to provide a hollow fiber nanofiltration composite membrane system to solve the problem that the existing hollow fiber nanofiltration composite membrane system mentioned in the above background technology will affect the filtration effect due to its weak hydrophilicity, water permeability and anti-fouling properties during use.

[0004] To achieve the above purpose, the utility model provides the following technical solutions: a hollow fiber nanofiltration composite membrane system, comprising

[0005] A composite membrane body and a clamping hole arranged at an inner side of the composite membrane body;

[0006] A filtering outer layer is arranged at the outermost position inside the composite membrane body;

[0007] A membrane base layer is arranged at the inner side of the outer filtration layer;

[0008] A filter element is arranged at the inner side of the membrane base layer;

[0009] A filter inner layer is provided at the inner side of the filter core;

[0010] The arrangement of the membrane base layer enhances the hydrophilicity, water permeability and anti-fouling properties of the hollow fiber nanofiltration composite membrane system.

[0011] Preferably, the filter element is made of hollow fiber material. The hollow fiber is usually a micro-tubular structure made of one or more polymer materials, with the internal cavity serving as a fluid channel and the outer wall serving as a filter medium.

[0012] Preferably, the outer filtration layer and the inner filtration layer are made of nanofiltration composite membrane materials, and the outer filtration layer and the inner filtration layer are respectively attached to the outermost and innermost sides of the filter core, and the thickness of the inner filtration layer and the outer filtration layer is 0.45 to 0.55 mm.

[0013] Preferably, the thickness of the membrane base layer is 0.25 to 0.35 mm, and the membrane base layer is mainly made of high molecular polymer materials such as polyamide, polyether, and polyketone.

[0014] Preferably, a desalination layer is arranged outside the membrane base layer and inside the filtration outer layer.

[0015] Preferably, the desalination layer is usually made of high molecular polymer materials, mainly polyamide, polyether, polyketone and the like.

[0016] Preferably, the thickness of the desalting layer is 0.55 to 0.65 mm. The provision of the desalting layer can play a role of pre-filtration protection.

[0017] Preferably, a protective outer ring is provided at an outer position of the composite membrane body, and an annular groove is provided at an inner wall position of the protective outer ring.

[0018] Preferably, an adhesive layer is provided inside the annular groove, and the protective outer ring is connected to the annular groove via the adhesive layer. The provision of the protective outer ring can protect the composite membrane body.

[0019] Compared with the prior art, the utility model provides a hollow fiber nanofiltration composite membrane system, which has the following beneficial effects:

[0020] 1. In the hollow fiber nanofiltration composite membrane system, when using the hollow fiber nanofiltration composite membrane system, the hollow fiber nanofiltration composite membrane system is first installed on the water purification equipment through the card hole. The hollow fiber nanofiltration composite membrane is prepared by adopting a multi-layer support structure. A filter element is used internally as the internal support layer of the hollow fiber nanofiltration composite membrane. An outer filter layer and an inner filter layer are arranged on the outer surface and inner surface of the filter element. Finally, a desalination layer and a membrane base layer are arranged at the inner side of the outer filter layer and the filter element. The arrangement of this multi-layer structure improves the binding property of the hollow fiber nanofiltration composite membrane system, can effectively capture and isolate pollutants, and prevent pollutants from passing through the entire membrane structure. Through the arrangement of the membrane base layer, the hydrophilicity, water permeability and anti-fouling property of the hollow fiber nanofiltration composite membrane system can be improved, so that the hollow fiber nanofiltration composite membrane system can better purify sewage.

[0021] 2. In the hollow fiber nanofiltration composite membrane system, when the hollow fiber nanofiltration composite membrane system is used, the hollow fiber nanofiltration composite membrane system is first installed on the water purification equipment through the card hole. The hollow fiber nanofiltration composite membrane adopts a five-layer structure of filtration outer layer-desalting layer-membrane base layer-filter core-filter inner layer. Compared with the traditional hollow fiber nanofiltration composite membrane, the filtration layer and desalting layer on both sides of the hollow fiber nanofiltration composite membrane of this structure can play a supporting and pre-filtration protection role. The multi-layer membrane structure can be designed to disperse the load and reduce the single-point pressure, thereby improving the bearing capacity of the entire structure. In addition, the multi-layer membrane structure can also increase the rigidity and stability of the structure by increasing the number of membrane layers. Especially when subjected to external forces, the multi-layer membrane structure can better resist deformation, not only for both internal pressure and external pressure filtering methods, but also the desalting layer can greatly reduce the requirements for the quality of the influent water. Through the setting of the desalting layer, the hollow fiber nanofiltration composite membrane can be supported and pre-filtered. Protective role, thereby effectively extending the overall service life of the membrane, and thus making the hollow fiber nanofiltration composite membrane system can be better used.

[0022] 3. In the hollow fiber nanofiltration composite membrane system, when using the hollow fiber nanofiltration composite membrane system, first glue the adhesive layer to the inside of the annular groove so that the adhesive layer is located at the inner wall of the protective outer ring, and then clamp the composite membrane body to the inside of the protective outer ring. When the composite membrane body enters the inner side of the protective outer ring, it will be stuck by the adhesive layer on the inner side of the protective outer ring, so that the composite membrane body is installed on the inner side of the protective outer ring. Then, the hollow fiber nanofiltration composite membrane system is installed on the water purification equipment through the clamping hole. Through the setting of the protective outer ring, the composite membrane body can be protected, so that the hollow fiber nanofiltration composite membrane system can better purify sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a top view of the hollow fiber nanofiltration composite membrane system of the utility model.

[0024] Figure 2 It is a structural schematic diagram of the front view analysis diagram of the hollow fiber nanofiltration composite membrane system of the utility model.

[0025] Figure 3 It is a schematic diagram of the overall structure of the hollow fiber nanofiltration composite membrane system of the utility model.

[0026] Figure 4 It is a schematic structural diagram of an enlarged protective outer ring of the hollow fiber nanofiltration composite membrane system of the utility model.

[0027] In the figure: 1. composite membrane body; 2. filter element; 3. filter outer layer; 4. desalination layer; 5. membrane base layer; 6. card hole; 7. filter inner layer; 8. protective outer ring; 9. annular card groove; 10. adhesive layer. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The utility model provides Figure 1-4 The hollow fiber nanofiltration composite membrane system shown is a hollow fiber nanofiltration composite membrane system, comprising a composite membrane body 1 and a card hole 6 arranged at the inner side of the composite membrane body 1; a filtration outer layer 3 is arranged at the outermost position inside the composite membrane body 1; a membrane base layer 5 is arranged at the inner side of the filtration outer layer 3; a filter core 2 is arranged at the inner side of the membrane base layer 5; a filtration inner layer 7 is arranged at the inner side of the filter core 2; through the arrangement of the membrane base layer 5, the hydrophilicity, water permeability and anti-fouling properties of the hollow fiber nanofiltration composite membrane system are enhanced.

[0030] like Figure 1 , Figure 2 and Figure 3As shown, in order to improve the hydrophilicity, water permeability and anti-fouling property of the hollow fiber nanofiltration composite membrane system, when using the hollow fiber nanofiltration composite membrane system, the hollow fiber nanofiltration composite membrane system is first installed on the water purification equipment through the card hole 6, and the hollow fiber nanofiltration composite membrane is prepared by adopting a multi-layer support structure, and a filter core 2 is used internally as the internal support layer of the hollow fiber nanofiltration composite membrane, and a filter outer layer 3 and a filter inner layer 7 are arranged on the outer surface and the inner surface of the filter core 2, and finally a desalination layer 4 and a membrane base layer 5 are arranged at the inner side of the filter outer layer 3 and the filter core 2. The arrangement of this multi-layer structure improves the binding property of the hollow fiber nanofiltration composite membrane system, can effectively capture and isolate pollutants, and prevent pollutants from passing through the entire membrane structure. Through the arrangement of the membrane base layer 5, the hydrophilicity, water permeability and anti-fouling property of the hollow fiber nanofiltration composite membrane system can be improved, so that the hollow fiber nanofiltration composite membrane system can better purify sewage.

[0031] The filter element 2 is made of hollow fiber material. The hollow fiber is usually a micro-tubular structure made of one or more polymer materials. The internal cavity serves as a fluid channel, and the outer wall serves as a filter medium. The filter outer layer 3 and the filter inner layer 7 are made of nanofiltration composite membrane materials. The filter outer layer 3 and the filter inner layer 7 are respectively attached to the outermost and innermost sides of the filter element 2. The thickness of the filter outer layer 3 and the filter inner layer 7 is 0.45 to 0.55 mm, and the thickness of the membrane base layer 5 is 0.25 to 0.35 mm. The membrane base layer 5 is mainly made of high molecular polymer materials such as polyamide, polyether, and polyketone.

[0032] like Figure 1 , Figure 2 and Figure 3 As shown, in order to protect the hollow fiber nanofiltration composite membrane system, when using the hollow fiber nanofiltration composite membrane system, the hollow fiber nanofiltration composite membrane system is first installed on the water purification equipment through the card hole 6. The hollow fiber nanofiltration composite membrane is prepared by adopting a multi-layer support structure. The filter core 2 is used internally as the internal support layer of the hollow fiber nanofiltration composite membrane. The outer surface and inner surface of the filter core 2 are provided with a filter outer layer 3 and a filter inner layer 7. Through the setting of the filter outer layer 3 and the filter inner layer 7, the hollow fiber nanofiltration composite membrane system can be protected, so that the hollow fiber nanofiltration composite membrane system can better filter sewage.

[0033] A desalting layer 4 is arranged outside the membrane base layer 5 and inside the filtration outer layer 3. The desalting layer 4 is usually made of high molecular polymer materials, mainly polyamide, polyether, polyketone, etc. The thickness of the desalting layer 4 is 0.55 to 0.65 mm. The setting of the desalting layer 4 can play a pre-filtration protection role.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, in order to support and pre-filter the hollow fiber nanofiltration composite membrane and effectively extend the overall service life of the membrane, when using the hollow fiber nanofiltration composite membrane system, the hollow fiber nanofiltration composite membrane system is first installed on the water purification equipment through the card hole 6. The hollow fiber nanofiltration composite membrane adopts a five-layer structure of a filtration outer layer 3-desalting layer 4-membrane base layer 5-filter core 2-filter inner layer 7. Compared with the traditional hollow fiber nanofiltration composite membrane, the filtration layer and desalting layer 4 on both sides of the hollow fiber nanofiltration composite membrane of this structure can play a pre-filtering protection role. The multi-layer membrane structure can be dispersed by design. load, reducing single-point pressure, thereby improving the bearing capacity of the entire structure. In addition, the multi-layer membrane structure can also improve the rigidity and stability of the structure by increasing the number of membrane layers, especially when subjected to external forces. The multi-layer membrane structure can better resist deformation, and is not only applicable to both internal pressure and external pressure filtration methods, but also the desalination layer 4 can greatly reduce the requirements for inlet water quality. Through the setting of the desalination layer 4, the hollow fiber nanofiltration composite membrane can be pre-filtered and protected, thereby effectively extending the overall service life of the membrane, and thus allowing the hollow fiber nanofiltration composite membrane system to be better used.

[0035] A protective outer ring 8 is arranged at the outer side of the composite membrane body 1, an annular groove 9 is arranged at the inner wall of the protective outer ring 8, an adhesive layer 10 is arranged inside the annular groove 9, and the protective outer ring 8 and the annular groove 9 are connected by the adhesive layer 10. The provision of the protective outer ring 8 can protect the composite membrane body 1.

[0036] like Figure 1 , Figure 3 and Figure 4 As shown, in order to protect the composite membrane body 1, when using the hollow fiber nanofiltration composite membrane system, the adhesive layer 10 is first glued to the inside of the annular groove 9 so that the adhesive layer 10 is located at the inner wall of the protective outer ring 8, and then the composite membrane body 1 is clamped inside the protective outer ring 8. When the composite membrane body 1 enters the inner side of the protective outer ring 8, it will be stuck by the adhesive layer 10 on the inner side of the protective outer ring 8, so that the composite membrane body 1 is installed on the inner side of the protective outer ring 8, and then the hollow fiber nanofiltration composite membrane system is installed on the water purification equipment through the clamping hole 6. Through the setting of the protective outer ring 8, the composite membrane body 1 can be protected, so that the hollow fiber nanofiltration composite membrane system can better purify sewage.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hollow fiber nanofiltration composite membrane system, characterized in that: include A composite membrane body (1) and a clamping hole (6) arranged at an inner side of the composite membrane body (1); A filtering outer layer (3) is provided at the outermost position inside the composite membrane body (1); A membrane base layer (5) is arranged at the inner side of the filtering outer layer (3); A filter core (2) is arranged at the inner side of the membrane base layer (5); A filter inner layer (7) is provided at the inner side of the filter core (2); By providing the membrane base layer (5), the hydrophilicity, water permeability and anti-fouling properties of the hollow fiber nanofiltration composite membrane system are enhanced.

2. A hollow fiber nanofiltration composite membrane system according to claim 1, characterized in that: The filter element (2) is made of hollow fiber material. The hollow fiber is a micro-tubular structure made of one or more polymer materials. The internal cavity of the hollow fiber serves as a fluid channel, and the outer wall serves as a filter medium.

3. A hollow fiber nanofiltration composite membrane system according to claim 1, characterized in that: The outer filtration layer (3) and the inner filtration layer (7) are made of nanofiltration composite membrane material. The outer filtration layer (3) and the inner filtration layer (7) are respectively attached to the outermost side and the innermost side of the filter core (2). The thickness of the outer filtration layer (3) and the inner filtration layer (7) is 0.45 to 0.55 mm.

4. The hollow fiber nanofiltration composite membrane system according to claim 1, characterized in that: The thickness of the membrane base layer (5) is 0.25 to 0.35 mm, and the membrane base layer (5) is mainly made of high molecular polymer materials such as polyamide, polyether, polyketone, etc.

5. A hollow fiber nanofiltration composite membrane system according to claim 4, characterized in that: A desalination layer (4) is arranged outside the membrane base layer (5) and inside the filtration outer layer (3).

6. A hollow fiber nanofiltration composite membrane system according to claim 5, characterized in that: The desalination layer (4) is made of high molecular polymer materials, mainly polyamide, polyether and polyketone.

7. A hollow fiber nanofiltration composite membrane system according to claim 6, characterized in that: The thickness of the desalination layer (4) is 0.55 to 0.65 mm. The provision of the desalination layer (4) can play a role in pre-filtration protection.

8. The hollow fiber nanofiltration composite membrane system according to claim 1, characterized in that: A protective outer ring (8) is provided at the outer side of the composite membrane body (1), and an annular clamping groove (9) is provided at the inner wall of the protective outer ring (8).

9. A hollow fiber nanofiltration composite membrane system according to claim 8, characterized in that: An adhesive layer (10) is provided inside the annular groove (9), and the protective outer ring (8) is connected to the annular groove (9) via the adhesive layer (10). The provision of the protective outer ring (8) can protect the composite membrane body (1).

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