Paper folding type oil-water separation film

Abstract

The utility model discloses a paper folding type oil-water separation film, which belongs to the technical field of oil-water separation films and comprises a composite non-woven fabric film and two fixing rods which are tightly attached to the lower end of the composite non-woven fabric film and are identical in shape and length. The two fixing rods are symmetrically arranged with the axis of the composite non-woven fabric film as the center, the fixing rods are arranged to be of a stable wave-like structure through multiple times of folding treatment, and the structure of the composite non-woven fabric film is matched with the structure of the fixing rods. According to the oil-water separation film, the oil-water separation film is arranged to be of a paper folding type structure, the contact area between liquid and a film material is increased in a folding mode, the oil-water separation rate is effectively increased, and then the efficiency and accuracy of the whole separation process are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-water separation films, in particular to an origami-type oil-water separation film. Background Art

[0002] The filter membrane with special wettability in the prior art does not require any chemical surface modification or coating treatment when used, and can obtain excellent underwater oleophobic performance through a simple water immersion process. The composite use of polypropylene fiber and wood pulp fiber not only enhances the strength and durability of the material, but also gives it better environmental performance and degradability.

[0003] However, since the flowing liquid mainly passes through the filter membrane in the vertical direction, the surface area of ​​the filter membrane itself remains relatively fixed and limited, which limits the contact area between the liquid and the filter membrane. This limited contact area becomes a key issue when treating oil-water mixtures. It may hinder the full contact between the oil droplets and the non-woven material, resulting in some oil droplets not being effectively intercepted or adsorbed. As the treatment progresses, the separation efficiency drops rapidly, limiting the filter membrane's ability to treat oil-water mixtures.

[0004] Therefore, in order to solve the problems of limited liquid contact area, low separation efficiency, and limited interception efficiency and processing capacity of oil droplets in the oil-water separation process, an origami oil-water separation membrane is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide an origami-type oil-water separation membrane. By setting the oil-water separation membrane as an origami-type structure, the contact area between the liquid and the membrane material is increased by folding, the rate of oil-water separation is effectively improved, thereby improving the efficiency and accuracy of the entire separation process.

[0006] To achieve the above-mentioned purpose, the utility model provides an origami-type oil-water separation membrane, comprising a composite non-woven film and two fixing rods of the same shape and length tightly attached to the lower end of the composite non-woven film, the two fixing rods are symmetrically arranged with the axis of the composite non-woven film as the center, the fixing rods are arranged to form a stable wavy structure through multiple folding processes, and the structure of the composite non-woven film is compatible with the structure of the fixing rods.

[0007] Preferably, each folding angle of the fixing rod is the same, which is 150°±5°, and the folding part of the fixing rod is subjected to fixed-point processing.

[0008] Preferably, the fixing rod is made of a material that does not react with water or oil and is not easily corroded.

[0009] Preferably, the fixing rod is made of metal, silicone or plastic, and other materials that do not react with water or oil and are not easily corroded may also be used.

[0010] Preferably, the cross-sectional shape of the fixing rod is circular, square or polygonal;

[0011] Preferably, the composite nonwoven fabric film is a composite nonwoven fabric composed of polypropylene fibers and wood pulp fibers;

[0012] Preferably, the method for making the origami-type oil-water separation film is:

[0013] 1) Select two fixed rods of specific lengths, perform precise folding on the fixed rods, ensure that the folding angle is within the range of 150°±5°, locate the folding points, and fold according to the number of highest points required;

[0014] 2) Marking folding points on the composite non-woven film corresponding to the fixing rods before folding as positioning points for folding the film, and then folding the fixing rods;

[0015] 3) The composite non-woven film is precisely matched with the folded fixing rod by pressing, and the fixing rod is ensured to be symmetrical about the central axis under the non-woven film, and the two are ensured to fit perfectly along the folding line to obtain an origami-type oil-water separation film.

[0016] Therefore, the utility model adopts an origami-type oil-water separation membrane with the above-mentioned structure. By structurally optimizing the polypropylene fiber and wood pulp fiber composite non-woven film material in the prior art and setting it into an origami shape, the contact area between the liquid and the film material is significantly increased, the flux of water through the oil-water separation membrane is increased, the rate of oil-water separation is effectively improved, and the efficiency and accuracy of the entire separation process are thereby improved. It has important practical application value and broad market prospects.

[0017] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top schematic diagram of a square origami oil-water separation membrane according to an embodiment of the utility model;

[0019] Figure 2 This is a bottom schematic diagram of a square origami oil-water separation membrane according to an embodiment of the utility model;

[0020] Figure 3 A side view of a square origami oil-water separation membrane according to an embodiment of the utility model;

[0021] Figure 4It is a top schematic diagram of a circular origami oil-water separation membrane according to an embodiment of the utility model;

[0022] Figure 5 This is a bottom schematic diagram of a circular origami oil-water separation membrane according to an embodiment of the utility model;

[0023] Figure 6 A schematic diagram showing the calculation of the radial length of a circular origami oil-water separation membrane according to an embodiment of the utility model;

[0024] Figure 7 A schematic diagram showing the calculation of the contact area of ​​the circular origami oil-water separation membrane according to an embodiment of the utility model;

[0025] Among them, 1. composite non-woven film; 2. fixing rod. DETAILED DESCRIPTION

[0026] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0027] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] Example

[0029] like Figure 1-5As shown, the utility model provides an origami-type oil-water separation film, comprising a composite non-woven film 1 and two fixing rods 2 of the same shape and length that are tightly attached to the lower end of the composite non-woven film 1. The two fixing rods 2 are symmetrically arranged with the axis of the composite non-woven film 1 as the center. The fixing rods 2 are arranged to form a stable wavy structure after multiple folding processes. Each folding angle of the fixing rods 2 is the same, which is 150°±5°, so as to achieve the expected geometric shape and stability. The folding part of the fixing rod 2 is fixed-point processed to ensure the stability of the entire structure. The fixing rod 2 is arranged to be a material that does not react with water or oil and is not easily corroded; the material of the fixing rod 2 is one of metal, silicone or plastic, and other materials that do not react with water or oil and are not easily corroded can also be selected; the cross-sectional shape of the fixing rod 2 is circular, square or other polygonal; the structure of the composite non-woven film 1 is compatible with the structure of the fixing rod.

[0030] The method for making the circular origami oil-water separation membrane in this embodiment is as follows:

[0031] 1) Select two plastic rods of specific lengths, perform precise folding on the plastic rods, locate the fixed points, and fold according to the number of highest points required, taking folding to obtain n highest points as an example; ensure that the folding angle is within the range of 150°±5°.

[0032] When n highest points are obtained, 2n broken lines are obtained. If the length of each broken line is x, the actual length l of the plastic rod is:

[0033] l=2nx

[0034] 2) Mark the fixed points on the composite non-woven film corresponding to the marks on the plastic rod before folding, which serve as the fixed points for folding the film, and fold the plastic rod according to actual needs;

[0035] 3) The composite non-woven film is precisely matched with the folded plastic rod by pressing, and the plastic rod is ensured to be symmetrical about the central axis under the non-woven film, and the two are ensured to fit perfectly along the folding line to obtain an origami-type oil-water separation film.

[0036] like Figure 6 As shown, the angle of the origami is θ; for the first selection of θ, according to the superoleophobic surface (the surface with a contact angle of oil greater than 150°), θ is determined to be 150°±5°, and the size of the folding angle will be adjusted according to the specific origami experiment; the actual radial length of the origami oil-water separation membrane is calculated:

[0037]

[0038] It is concluded that

[0039]

[0040] Assume L is the actual radial length of the final origami oil-water separation membrane, then

[0041] L=2ny

[0042] Among them, y is the projection length of each section. According to the actual radial length L, the experimental equipment of corresponding size can be selected to carry out the oil-water separation experiment.

[0043] The performance of origami and ordinary oil-water separation membranes were compared, such as Figure 7 As shown in the figure, for the oil-water treatment experimental device with a radial length of L, if the origami oil-water separation membrane is not used, the contact area between the liquid and the ordinary oil-water separation membrane is S 1 ;

[0044] Its contact area is:

[0045]

[0046] If an origami oil-water separation membrane is used, in order to facilitate the comparison and calculation of the contact area between the two, we will perform a "simulated stretching" operation on the origami oil-water separation membrane and regard it as a flat membrane with a longitudinal length of l. Then the contact area between the liquid and the origami oil-water separation membrane is S 2 .

[0047]

[0048] From the above analysis, we can get that l>L, so we can get that S 2 >S 1 .

[0049] The origami oil-water separation membrane can effectively increase the contact area between the liquid and the membrane, so that more liquid can be separated from the oil and water. The flow rate and flow rate of the liquid under the membrane will increase. This is because a larger contact area means that more liquid needs to pass through in the same amount of time.

[0050] The above formulas are described using a circular oil-water separation membrane and a circular oil-water separation device. The principles of the above formulas are universal for oil-water separations of other shapes.

[0051] Therefore, the utility model adopts an origami-type oil-water separation membrane of the above-mentioned structure. By setting the oil-water separation membrane as an origami-type structure, the contact area between the liquid and the membrane material is increased by folding, thereby effectively improving the rate of oil-water separation, thereby improving the efficiency and accuracy of the entire separation process.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. An origami-type oil-water separation membrane, characterized in that: It includes a composite non-woven film and two fixing rods of the same shape and length that are tightly attached to the lower end of the composite non-woven film. The two fixing rods are symmetrically arranged with the axis of the composite non-woven film as the center. The fixing rods are arranged to form a stable wavy structure after multiple folding processes. The structure of the composite non-woven film is compatible with the structure of the fixing rods.

2. The origami oil-water separation membrane according to claim 1, characterized in that: Each folding angle of the fixing rod is the same, which is 150°±5°.

3. The origami oil-water separation membrane according to claim 2, characterized in that: The fixing rod is made of a material that does not react with water or oil and is not easily corroded.

4. The origami oil-water separation membrane according to claim 3, characterized in that: The fixing rod is made of metal, silicone or plastic.

5. The origami oil-water separation membrane according to claim 4, characterized in that: The cross-sectional shape of the fixing rod is circular or polygonal.

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