Anti-static roll type separation membrane assembly

Abstract

The utility model belongs to the technical field of gas separation and recovery, and provides an anti-static roll type separation membrane component which comprises a membrane shell, the membrane shell is of a sleeve structure, foam metal plugs are arranged at the two ends of the membrane shell, a through hole is reserved in the foam metal plug at one end of the membrane shell, a membrane element is arranged in the membrane shell, and a central pipe of the membrane element penetrates through the through hole and extends to the outer side of the membrane shell. According to the spiral-wound separation membrane assembly, the foam metal plugs are additionally arranged at the two ends of the membrane shell, due to the fact that the porosity of foam metal is high, gas is evenly distributed when entering the membrane shell, and the separation efficiency is effectively improved. Meanwhile, the foam metal has good electromagnetic shielding performance, and generation and accumulation of static electricity can be effectively reduced. And the inner wall of the membrane shell is coated with the anti-static coating, so that the anti-static performance is further enhanced, and the safety of the membrane module is remarkably improved. The membrane shell is compact in structure, high in separation efficiency and suitable for VOCs tail gas recovery on an industrial site.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas separation and recovery, and particularly relates to an anti-static spiral separation membrane module. Background Art

[0002] During the industrial production process, the emission of VOCs (Volatile Organic Compounds) has a serious impact on the environment and human health. Therefore, it is of great practical significance to develop efficient VOCs tail gas recovery technology.

[0003] Spiral membrane modules are widely used in the field of gas separation and recovery due to their efficient and compact structure. However, most of the existing spiral membrane modules for VOCs separation evolved from reverse osmosis water treatment membrane modules, and the structure and connection method of the internal filling membrane elements do not consider the problem of static electricity generation during gas operation, that is, static electricity accumulation is likely to occur during the operation of the existing spiral membrane modules, which will not only reduce the separation efficiency, but also may cause potential safety hazards, such as the risk of fire or explosion caused by static electricity discharge. In addition, the uneven distribution of gas when entering the membrane module will also affect the separation effect. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the utility model provides an anti-static spiral separation membrane module, which can solve the above problems.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: an anti-static spiral separation membrane module, including a membrane shell;

[0006] The membrane shell is of a sleeve structure, both ends of the membrane shell are provided with foam metal plugs, a through hole is reserved in the foam metal plug at one end of the membrane shell, a membrane element is arranged in the membrane shell, and the central tube of the membrane element passes through the through hole and extends to the outside of the membrane shell;

[0007] The foam metal plug is any one of a foam aluminum plug, a foam nickel plug, a foam copper plug, a foam iron plug, and a foam nickel-iron plug.

[0008] Preferably, an anti-static coating is coated on the inner wall of the membrane shell.

[0009] Preferably, the anti-static coating is a conductive polymer coating or a nano-conductive particle coating.

[0010] Preferably, the thickness of the anti-static coating is 5μm - 50μm.

[0011] Preferably, the foam metal plug is of a columnar structure, the foam metal plug is coaxial with the membrane shell, and the outer side wall of the foam metal plug abuts against the inner side wall of the membrane shell.

[0012] Preferably, the axial length of the foam metal plug is 1 cm - 20 cm.

[0013] Preferably, the pore diameter of the foam metal plug is 50 μm - 1000 μm.

[0014] Preferably, the membrane housing is a stainless steel membrane housing, a special plastic membrane housing or a fiberglass reinforced plastic membrane housing.

[0015] Preferably, at least one membrane element is provided in the membrane housing, and the membrane elements in the membrane housing are arranged in series.

[0016] Preferably, the separation membrane of the membrane element is any one of a PVDF and PDMS composite membrane, a PSF and PDMS composite membrane, a PES and PDMS, and a PAN and PDMS composite membrane.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. An anti-static roll-type separation membrane assembly provided by the present utility model adds foam metal plugs at both ends of the membrane housing. Due to the high porosity of the foam metal, the gas is evenly distributed when entering the membrane housing, effectively improving the separation efficiency. At the same time, the foam metal has good electromagnetic shielding performance, which can effectively reduce the generation and accumulation of static electricity.

[0019] 2. An anti-static roll-type separation membrane assembly provided by the present utility model coats an anti-static coating on the inner wall of the membrane housing, further enhancing the anti-static performance and significantly improving the safety of the membrane assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 1 is one of the three-dimensional structure diagrams of an anti-static roll-type separation membrane assembly provided by an embodiment of the present utility model;

[0021] Figure 2 FIG. 2 is another three-dimensional structure diagram of an anti-static roll-type separation membrane assembly provided by an embodiment of the present utility model;

[0022] Figure 3 FIG. 3 is a three-dimensional structure diagram of a membrane element and its related parts of an anti-static roll-type separation membrane assembly provided by an embodiment of the present utility model;

[0023] Figure 4 FIG. 4 is one of the cross-sectional diagrams of an anti-static roll-type separation membrane assembly provided by an embodiment of the present utility model;

[0024] Figure 5 FIG. 5 is a schematic diagram of the material flow direction of an anti-static roll-type separation membrane assembly provided by an embodiment of the present utility model;

[0025] Figure 6 This is the second cross-sectional schematic view of an anti-static roll-type separation membrane module provided by an embodiment of the present utility model.

[0026] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0027] 1. Membrane shell;

[0028] 2. Membrane element;

[0029] 3. Foam metal plug;

[0030] 4. Anti-static coating;

[0031] 5. Central tube;

[0032] 6. Foam metal gasket. Detailed implementation manners

[0033] In order to make the technical solutions and advantages in the embodiments of the present application clearer and more understandable, the following further details the exemplary embodiments of the present application with reference to the attached drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than an exhaustive list of all embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0034] This embodiment provides an anti-static roll-type separation membrane module, including a membrane shell 1.

[0035] Among them, the membrane shell 1 is of a sleeve structure, and foam metal plugs 3 are provided at both ends of the membrane shell 1.

[0036] For example, referring to Figure 1-2 , the membrane shell 1 is of a sleeve structure, with both ends of the membrane shell 1 open, and foam metal plugs 3 are provided in the openings at both ends of the membrane shell 1. The foam metal plug 3 not only has a high porosity but also has good electromagnetic shielding performance.

[0037] A through hole is reserved in the foam metal plug 3 at one end of the membrane shell 1, and a membrane element 2 is provided in the membrane shell 1. The central tube 5 of the membrane element 2 passes through the through hole and extends to the outside of the membrane shell 1.

[0038] For example, referring to Figure 3 , a membrane element 2 is coaxially fixed in the membrane shell 1. The membrane element 2 is adapted to the membrane shell 1, that is, the outer sidewall of the membrane element 2 abuts against the inner sidewall of the membrane shell 1, and the membrane element 2 is located between two foam metal plugs 3. Among them, the membrane element 2 is a prior art. The membrane element 2 includes a central tube 5. Referring to Figure 4 , a through hole adapted to the central tube 5 is reserved in the right-end foam metal plug 3. The right end of the central tube 5 passes through the through hole and extends to the outside of the membrane shell 1, and the left end of the central tube 5 can be closed. Referring to Figure 5, when the gas enters from the left end of the membrane shell 1, it first passes through the foam metal plug 3 at the left end, then enters the membrane element 2. Part of the gas passes through the membrane filtration and enters the central tube 5, and is discharged from the right end of the central tube 5. The remaining gas directly passes through the foam metal plug 3 at the right end and is discharged from the right end of the membrane shell 1.

[0039] The foam metal plug 3 is any one of a foam aluminum plug, a foam nickel plug, a foam copper plug, a foam iron plug, and a foam nickel-iron plug.

[0040] Based on the above structure, for the anti-static spiral separation membrane module provided in this embodiment, foam metal plugs 3 are added at both ends of the membrane shell 1. Due to the relatively high porosity of the foam metal, the gas is evenly distributed when entering the membrane shell 1, effectively improving the separation efficiency. At the same time, the foam metal has good electromagnetic shielding performance, which can effectively reduce the generation and accumulation of static electricity. Moreover, the structure is compact and occupies a small area, which is suitable for installation in industrial sites.

[0041] On the basis of the above technical solution, in the technical solution provided in this embodiment, an anti-static coating 4 is coated on the inner wall of the membrane shell 1.

[0042] For example, referring to Figure 4 , an anti-static coating 4 is coated on the inner wall of the membrane shell 1. The anti-static coating 4 can be a conductive polymer coating or a nano-conductive particle coating. The thickness of the anti-static coating 4 is 5 μm - 50 μm. The anti-static coating 4 and the foam metal plug 3 can provide double protection, effectively eliminating static electricity and significantly improving the safety of the membrane module.

[0043] In the technical solution provided in this embodiment, the foam metal plug 3 is in a columnar structure, the foam metal plug 3 is coaxial with the membrane shell 1, and the outer side wall of the foam metal plug 3 abuts against the inner side wall of the membrane shell 1.

[0044] For example, referring to Figure 4 , the foam metal plug 3 can be a columnar structure made of a foam metal material and is coaxially arranged with the membrane shell 1. The foam metal plug 3 can be fixed on the inner side wall of the membrane shell 1 by an adhesive method, and the adhesive method is simple to operate. Of course, the foam metal plug 3 can also be fixed on the inner wall of the membrane shell 1 by other methods. For example, an embedded annular groove is coaxially opened on the inner side wall of the membrane shell 1, and annular elastic pieces are provided at both ends of the foam metal plug 3. The outer diameter of the annular elastic piece is larger than the inner diameter of the membrane shell 1, and the inner diameter of the annular elastic piece is smaller than the inner diameter of the membrane shell 1, that is, the annular elastic piece can be embedded in the annular groove, and at the same time, the inner end of the annular elastic piece is exposed outside the annular groove and plays a role of blocking and limiting, which can prevent the foam metal plug 3 from moving left and right in the membrane shell 1.

[0045] Among them, the axial length of the foam metal plug 3 can be 1 cm - 20 cm. The pore diameter of the foam metal plug 3 can be 50 μm - 1000 μm.

[0046] In the technical solution provided in this embodiment, the membrane housing 1 is made of high-strength and corrosion-resistant materials, such as stainless steel membrane housing, special plastic membrane housing or fiberglass reinforced plastic membrane housing.

[0047] In the technical solution provided in this embodiment, at least one membrane element 2 is provided in the membrane housing 1, and the membrane elements 2 in the membrane housing 1 are arranged in series.

[0048] For example, referring to Figure 6 , two membrane elements 2 are provided in the membrane housing 1, and the two membrane elements 2 are arranged in series. The central tube 5 of the left membrane element 2 is communicated with the central tube 5 of the right membrane element 2. The right end of the central tube 5 of the right membrane element 2 passes through the through hole of the right-end foam metal plug 3 and extends to the outside of the membrane housing 1.

[0049] Among them, the connection part of the central tubes 5 of the two membrane elements 2 is sealed by a seal to ensure that gas can only be separated through the membrane layer. At the same time, a foam metal gasket 6 can be provided between the two membrane elements 2, so that the gas can pass through the foam metal multiple times, and the good conductivity of the foam metal can effectively eliminate static electricity.

[0050] In the technical solution provided in this embodiment, the separation membrane of the membrane element 2 is any one of a PVDF and PDMS composite membrane, a PSF and PDMS composite membrane, a PES and PDMS composite membrane, and a PAN and PDMS composite membrane.

[0051] The separation membrane adopts a composite membrane of PVDF and PDMS, etc., which is used to realize the separation of VOCs and tail gas, has good gas selectivity, and the spiral wound structure increases the effective separation area and improves the separation efficiency.

[0052] To sum up, the anti-static spiral wound separation membrane module provided in this embodiment may be implemented as follows:

[0053] Embodiment 1

[0054] Membrane housing

[0055] • Material: Stainless steel

[0056] • Dimensions: Diameter 200 mm, length 2500 mm

[0057] Membrane element

[0058] • Membrane material: Composite membrane of PVDF, etc. and PDMS

[0059] • Number of membrane elements: 2, arranged in series

[0060] • Dimensions of membrane element: Diameter 198 mm, length 1060 mm

[0061] Foam metal plug

[0062] • Material: Aluminum foam

[0063] • Pore size: 500 μm

[0064] • Thickness: 6 cm

[0065] • Installation location: Both ends of the membrane housing

[0066] Antistatic coating

[0067] • Material: Polyaniline

[0068] • Coating thickness: 5 μm

[0069] Component assembly steps

[0070] S1. Membrane element installation:

[0071] Connect two membrane elements in series through a seal to ensure good sealing between the membrane elements;

[0072] Insert the series-connected membrane elements into the membrane housing to ensure tight fit between the membrane elements and the inner wall of the membrane housing.

[0073] S2. Installation of foam metal plugs:

[0074] Select 6 pieces of aluminum foam with a pore size of 500 μm and a thickness of 1 cm and stack them, with a total thickness of 6 cm;

[0075] Cut the aluminum foam into dimensions matching both ends of the membrane housing to form foam metal plugs;

[0076] Install the foam metal plugs at both ends of the membrane housing respectively to ensure tight fit between the foam metal plugs and the inner wall of the membrane housing;

[0077] Fix the foam metal plugs at both ends of the membrane housing by mechanical fixation or adhesive.

[0078] S3. Preparation of antistatic coating:

[0079] Dissolve polyaniline in an appropriate amount of ethanol to form a uniform coating;

[0080] Apply the coating evenly on the inner surface of the membrane housing, with the coating thickness controlled at 5 μm;

[0081] Dry the coated membrane housing at 60 °C for 24 hours to ensure uniform and firm coating.

[0082] S4. Sealing and testing:

[0083] Seal the membrane housing to ensure no gas leakage;

[0084] Conduct gas distribution and antistatic performance tests to verify the performance of the component.

[0085] Example 2

[0086] Membrane housing

[0087] • Material: Nickel-plated carbon steel

[0088] • Dimensions: Diameter 200 mm, length 3500 mm

[0089] Membrane element

[0090] • Membrane material: Composite membrane of PVDF etc. and PDMS

[0091] • Number of membrane elements: 3, arranged in series

[0092] • Dimensions of membrane element: Diameter 198 mm, length 1060 mm

[0093] Foamed metal plug

[0094] • Material: Foamed nickel

[0095] • Aperture: 600 μm

[0096] • Thickness: 5 cm

[0097] • Installation position: Both ends of the membrane housing

[0098] Antistatic coating

[0099] • Material: Nickel-plated carbon steel

[0100] • Coating thickness: 10 μm

[0101] Assembly steps of the component

[0102] S1. Installation of membrane element:

[0103] Connect three membrane elements in series through seals to ensure good sealing between the membrane elements;

[0104] Install the series-connected membrane elements into the membrane housing to ensure close fit between the membrane elements and the inner wall of the membrane housing.

[0105] S2. Installation of foamed metal plug:

[0106] Select 10 pieces of foamed nickel with an aperture of 600 μm and a thickness of 5 mm and stack them into 5 cm;

[0107] Cut the foamed nickel into dimensions matching both ends of the membrane housing 1 to form foamed metal plugs;

[0108] Install foamed metal plugs at both ends of the membrane housing respectively to ensure close fit between the foamed metal plugs and the inner wall of the membrane housing;

[0109] Fix the foamed metal plugs at both ends of the membrane housing by mechanical fixation or adhesive.

[0110] S3. Antistatic Coating Preparation:

[0111] Evenly coat the carbon steel nickel plating coating on the inner surface of the membrane housing, and control the coating thickness at 5 μm;

[0112] Dry the coated membrane housing at 60 °C for 24 hours to ensure that the coating is even and firm.

[0113] S4. Sealing and Testing:

[0114] Seal the membrane housing to ensure no gas leakage;

[0115] Conduct gas distribution and antistatic performance tests to verify the performance of the component.

[0116] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0117] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is at least one, such as two, three, etc., unless otherwise specifically defined.

[0118] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and modifications falling within the scope of the present application.

[0119] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.

Claims

1. An antistatic roll - type separation membrane module, characterized in that, It includes a membrane shell (1); The membrane shell (1) is of a sleeve structure. Foam metal plugs (3) are provided at both ends of the membrane shell (1). A through hole is reserved in the foam metal plug (3) at one end of the membrane shell (1). A membrane element (2) is arranged in the membrane shell (1), and the central tube (5) of the membrane element (2) passes through the through hole and extends to the outside of the membrane shell (1); The foam metal plug (3) is any one of a foam aluminum plug, a foam nickel plug, a foam copper plug, a foam iron plug, and a foam nickel-iron plug.

2. The antistatic roll - type separation membrane module according to claim 1, characterized in that, An anti-static coating (4) is coated on the inner wall of the membrane shell (1).

3. The antistatic roll - type separation membrane module according to claim 2, characterized in that, The anti-static coating (4) is a conductive polymer coating or a nano-conductive particle coating.

4. The antistatic roll - type separation membrane module according to claim 2, characterized in that, The thickness of the anti-static coating (4) is 5μm - 50μm.

5. The antistatic roll - type separation membrane module according to claim 1, characterized in that, The foam metal plug (3) is of a columnar structure. The foam metal plug (3) is coaxial with the membrane shell (1), and the outer side wall of the foam metal plug (3) abuts against the inner side wall of the membrane shell (1).

6. The antistatic roll - type separation membrane module according to claim 5, characterized in that, The axial length of the foam metal plug (3) is 1 cm - 20 cm.

7. The antistatic roll - type separation membrane module according to claim 1, characterized in that, The pore diameter of the foam metal plug (3) is 50μm - 1000μm.

8. The antistatic roll - type separation membrane module according to claim 1, characterized in that, The membrane shell (1) is a stainless steel membrane shell, a special plastic membrane shell, or a fiberglass membrane shell.

9. The antistatic roll - type separation membrane module according to claim 1, characterized in that, At least one membrane element (2) is arranged in the membrane shell (1), and the membrane elements (2) in the membrane shell (1) are arranged in series.

10. The antistatic roll - type separation membrane module according to claim 1, characterized in that, The separation membrane of the membrane element (2) is any one of a PVDF and PDMS composite membrane, a PSF and PDMS composite membrane, a PES and PDMS composite membrane, and a PAN and PDMS composite membrane.

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