A microplastics filtration device

Abstract

The utility model discloses a kind of microplastic filtering devices, it is related to microplastic processing technical field, including: support frame and filter main body, filter main body is set on support frame, filter main body includes water sample reservoir, first filter screen, valve, filter cavity and second filter screen;The aperture of first filter screen is larger than the aperture of second filter screen inside;The utility model uses, first filter screen and second filter screen are integrated in one;When using, after accurate amount of water sample is poured in water sample reservoir, valve is opened, water flow is through the first filter screen of large aperture to the second filter screen of small aperture, microplastic is left above the second filter screen, water flows out filter main body through second filter screen, the retained material on second filter screen is the microplastic needed to be collected;Microplastic is collected by the present application, better sealing, and first filter screen and second filter screen position are fixed, not shake when collecting, guarantee the stability of collection, and then ensure the accuracy of collection result.

Description

Technical Field

[0001] This utility model relates to the field of microplastic processing technology, specifically a microplastic filtration device. Background Technology

[0002] Microplastics (MPs) are characterized by strong hydrophobicity, large specific surface area, environmental durability, and biomagnification. MPs can cause gastrointestinal disorders, endocrine disturbances, and other toxicities through food chain amplification or direct ingestion in humans. Their migration, transformation, and ecological effects in aquatic environments have become a research hotspot in environmental science, attracting widespread attention both domestically and internationally.

[0003] The collection of microplastics is the first step in the detection of microplastics in water. Currently, the market generally uses two independent sieves with a larger aperture (usually 5 mm) and a smaller aperture (usually 0.048 mm) to screen out microplastics separately. However, when collecting microplastics from actual water samples, the two sieves are set up independently, which has poor stability and insufficient sealing, and may affect the collection results.

[0004] Therefore, a microplastic filtration device is needed. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model solves the problem using the following technical structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A microplastic filtration device includes: a support frame and a filter body. The filter body is disposed on the support frame. The filter body includes a water sample storage container, a first filter screen, a valve, a filter chamber, and a second filter screen. The water sample storage container is provided with a water storage chamber. The water sample storage container is provided with a water outlet at the bottom of the water storage chamber. The first filter screen is disposed at the water outlet. The filter chamber is disposed at the bottom of the water outlet. The valve is disposed between the water outlet and the filter chamber. The second filter screen is disposed at the bottom of the filter chamber.

[0008] The pore size of the first filter screen is larger than that of the second filter screen.

[0009] The water sample storage device includes a funnel-shaped guide section and a water storage section disposed on the top of the guide section, and the inner side of the guide section and the water storage section is a water storage cavity.

[0010] The water storage section is circular in shape.

[0011] The second filter screen includes a first mesh body and a mounting ring disposed circumferentially around the first mesh body. The mounting ring is disposed at the bottom of the filter chamber by a clamp.

[0012] The second filter screen also includes a second mesh body, which is disposed inside the mounting ring and at the bottom of the first mesh body. The first mesh body is made of a flexible material, and the second mesh body is made of a rigid material.

[0013] The support frame includes a fixed ring, a support ring disposed below the fixed ring, and a plurality of support rods disposed between the fixed ring and the support ring, and the water sample storage device is disposed inside the fixed ring.

[0014] The support frame is provided with a guide plate directly below the second filter screen, and the guide plate is provided with a guide groove.

[0015] The first filter screen has a pore size of 5 mm.

[0016] The aperture of the first mesh is 0.048 mm.

[0017] The valve is a manual valve.

[0018] The above-described structure of this utility model can achieve the following beneficial effects:

[0019] In use, the filter body is supported by a support frame, integrating the first and second filter screens into one unit and separated by a filter chamber. During use, after pouring an accurate amount of water sample into the water sample storage container, the valve is opened, and the water flows through the large-aperture first filter screen to the small-aperture second filter screen, trapping microplastics above the second filter screen. The water then flows out of the filter body through the second filter screen, and the trapped material on the second filter screen is the microplastic to be collected. Using this method for microplastic collection provides good sealing, and the fixed positions of the first and second filter screens prevent shaking during collection, ensuring collection stability and thus guaranteeing the accuracy of the collection results. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of this embodiment;

[0021] Figure 2 This is a structural schematic diagram from another perspective of this embodiment;

[0022] Figure 3 This is a schematic diagram of the structure of the second filter in this embodiment;

[0023] Figure 4 This is a structural schematic diagram of the second filter screen from another perspective in this embodiment.

[0024] In the diagram: 1. Support frame; 11. Fixing ring; 12. Support ring; 13. Support rod; 2. Water sample storage container; 21. Guide section; 22. Water storage section; 3. First filter screen; 4. Valve; 5. Second filter screen; 51. First mesh body; 52. Mounting ring; 53. Second mesh body; 6. Guide plate; 61. Guide groove. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0026] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0027] The collection of microplastics is the first step in conducting microplastic detection in water bodies. The Ministry of Water Resources' industry standard, "Determination of Microplastics in Surface Water" (draft for comments), clearly states that 20L of surface water should be passed through 5mm and 0.048mm stainless steel sieves in sequence. The material trapped on the 5mm stainless steel sieve should be discarded, and 1L of purified water should be used to backwash the solid particles (trapped material) on the 0.048mm sieve into the collection bottle.

[0028] In view of the above, in order to facilitate the collection of microplastics in water samples, this application discloses a microplastic filtration device.

[0029] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0030] refer to Figures 1-2The microplastic filtration device shown includes: a support frame 1 and a filter body. The filter body is disposed on the support frame 1 and includes a water sample storage 2, a first filter screen 3, a valve 4, a filter chamber, and a second filter screen 5. The water sample storage 2 is provided with a water storage chamber, and the water sample storage 2 is provided with a water outlet at the bottom of the water storage chamber. The first filter screen 3 is disposed at the water outlet, the filter chamber is disposed at the bottom of the water outlet, the valve 4 (which can be a manual valve or an automatic valve) is disposed between the water outlet and the filter chamber, and the second filter screen 5 is disposed at the bottom of the filter chamber. The pore size of the first filter screen 3 is larger than the pore size of the second filter screen 5.

[0031] Based on the above structure, during use, the filter body is supported by the support frame 1, integrating the first filter screen 3 and the second filter screen 5 into one unit, and separated by the filter chamber. During use, after pouring an accurate amount of water sample into the water sample storage 2, the valve 4 is opened, and the water flows through the large-aperture first filter screen 3 to the small-aperture second filter screen 5, leaving the microplastics above the second filter screen 5. The water flows out of the filter body through the second filter screen 5, and the material trapped on the second filter screen 5 is the microplastic to be collected. The collection of microplastics using this application has good sealing performance, and the positions of the first filter screen 3 and the second filter screen 5 are fixed, preventing shaking during collection, thus ensuring the stability of the collection and the accuracy of the collection results.

[0032] like Figure 1 and Figure 2 As shown, the water sample storage device 2 includes a funnel-shaped guide section 21 (with the water outlet located at the bottom of the guide section 21) and a water storage section 22 located at the top of the guide section 21. The inner sides of the guide section 21 and the water storage section 22 form a water storage cavity. The funnel-shaped guide section 21 facilitates the discharge of water samples. Furthermore, the water storage section 22 is annular, which increases the volume of the water storage cavity, improves the storage capacity of water samples, and facilitates quantitative storage of water samples.

[0033] like Figure 3 and Figure 4As shown, after re-collection, the second filter 5 needs to be removed to extract the trapped material. The second filter 5 includes a first mesh body 51 and a mounting ring 52 disposed circumferentially around the first mesh body 51. The mounting ring 52 is mounted at the bottom of the filter chamber by a clamp, which fixes the mounting ring 51 to the bottom of the filter chamber, facilitating the removal of the second filter 5 after collection for extraction of the trapped material. The second filter 5 also includes a second mesh body 53, which is disposed inside the mounting ring 52 and at the bottom of the first mesh body 51. The first mesh body 51 is made of a flexible material. 3 is made of rigid material; when backwashing the second filter screen 5, the second filter screen 5 needs to be inverted (the first screen 51 is placed below the second screen 53) and backwashed from top to bottom. In order to avoid reducing the amount of pure water used, the pure water is diverted through the second screen 53 so that the pure water comes into contact with a larger area of ​​the first screen 51, and the water flow does not directly hit the first screen 51, so that the deformation of the first screen 51 is smaller (to avoid the first screen 51 from falling down in the middle after being impacted by a large water flow, which would affect the rinsing effect), thereby improving the efficiency of backwashing and saving the amount of pure water used.

[0034] like Figure 1 As shown, the support frame 1 includes a fixed ring 11, a support ring 12 disposed below the fixed ring 11, and a plurality of support rods 13 disposed between the fixed ring 11 and the support ring 12. The water sample storage 2 is disposed inside the fixed ring 11, and the fixed ring 11 supports the water sample storage 2 (the guide part 21 is placed on the fixed ring 11 from top to bottom), which facilitates disassembly and assembly; and the support ring 12 is in contact with the ground, which improves the support effect.

[0035] Further optimizations include, for example Figure 1 As shown, a guide plate 6 is provided on the support frame 1 directly below the second filter screen 5. The guide plate 6 is provided with a guide groove 61 to guide the water flow from the second filter screen 5 and prevent water from splashing.

[0036] In this embodiment, the pore size of the first filter screen 3 is 5 mm; the pore size of the first mesh body 51 is 0.048 mm (the pore size of the second mesh body 53 is not less than the pore size of the first mesh body 51).

[0037] In summary, during use, the filter body is supported by the support frame 1, integrating the first filter screen 3 and the second filter screen 5 into one unit, and separated by the filter chamber. During use, after pouring an accurate amount of water sample into the water sample storage 2, the valve 4 is opened, and the water flows through the large-aperture first filter screen 3 to the small-aperture second filter screen 5, leaving microplastics above the second filter screen 5. The water then flows out of the filter body through the second filter screen 5, and the trapped material on the second filter screen 5 is the microplastic to be collected. Using this method for microplastic collection provides good sealing, and the fixed positions of the first filter screen 3 and the second filter screen 5 prevent shaking during collection, ensuring collection stability and thus ensuring the accuracy of the collection results.

[0038] The above are merely preferred embodiments of this application, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations that can be directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included within the protection scope of the present invention.

Claims

1. A microplastic filtration device, characterized in that, include: A support frame (1) and a filter body are provided. The filter body is set on the support frame (1). The filter body includes a water sample storage (2), a first filter screen (3), a valve (4), a filter chamber, and a second filter screen (5). The water sample storage (2) is provided with a water storage chamber. The water sample storage (2) is provided with a water outlet at the bottom of the water storage chamber. The first filter screen (3) is set at the water outlet. The filter chamber is set at the bottom of the water outlet. The valve (4) is set between the water outlet and the filter chamber. The second filter screen (5) is set at the bottom of the filter chamber. The pore size of the first filter screen (3) is larger than that of the second filter screen (5).

2. The microplastic filtration device according to claim 1, characterized in that: The water sample storage device (2) includes a funnel-shaped guide section (21) and a water storage section (22) disposed on the top of the guide section (21), with the inner sides of the guide section (21) and the water storage section (22) forming a water storage cavity.

3. The microplastic filtration device according to claim 2, characterized in that: The water storage section (22) is circular.

4. The microplastic filtration device according to claim 1, characterized in that: The second filter (5) includes a first mesh body (51) and a mounting ring (52) disposed circumferentially on the first mesh body (51). The mounting ring (52) is disposed at the bottom of the filter chamber by a clamp.

5. The microplastic filtration device according to claim 4, characterized in that: The second filter (5) also includes a second mesh body (53), which is disposed inside the mounting ring (52) and at the bottom of the first mesh body (51). The first mesh body (51) is made of a flexible material, and the second mesh body (53) is made of a rigid material.

6. The microplastic filtration device according to claim 1, characterized in that: The support frame (1) includes a fixed ring (11), a support ring (12) disposed below the fixed ring (11), and a plurality of support rods (13) disposed between the fixed ring (11) and the support ring (12). The water sample storage (2) is disposed inside the fixed ring (11).

7. The microplastic filtration device according to claim 1, characterized in that: The support frame (1) is provided with a guide plate (6) directly below the second filter screen (5), and the guide plate (6) is provided with a guide groove (61).

8. The microplastic filtration device according to claim 4, characterized in that: The first filter screen (3) has a pore size of 5 mm.

9. The microplastic filtration device according to claim 8, characterized in that: The aperture of the first mesh (51) is 0.048 mm.

10. The microplastic filtration device according to claim 1, characterized in that: The valve (4) is a manual valve.

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