Portable micro-nano plastic enrichment sampling device in water body

Abstract

The utility model discloses a portable micro -nano plastic enrichment sampling device in water body, including first filter, second filter and third filter, through the filter membrane size in filter in reasonable design, realize the effective separation of different particle size micro -nano plastic, improve the precision of sampling, and then accurate monitoring micro -nano plastic's content in water body, particle size distribution etc. information, the sampling device is simplified, optimized, light -weight, reduces maintenance cost and operation difficulty, improves sampling efficiency and reliability, aiming at the present situation of micro -nano plastic sampling and determination, improves filter membrane material and aperture, improves the sampling effect of micro -nano plastic, provides strong support for the comprehensive accurate evaluation of water body micro -nano plastic pollution situation and prevention and control management.

Description

Technical Field

[0001] This utility model belongs to the field of environmental monitoring technology, specifically relating to a sampling device for enriching micro-nano plastics in water. Background Technology

[0002] Microplastics refer to plastic particles with a size generally less than 5 mm, while nanoplastics refer to plastic particles with a size less than 1 μm. Microplastics and nanoplastics originate from ubiquitous plastic products in human society. Due to their small particle size and large specific surface area, they easily adsorb heavy metals, organic pollutants, and other substances from the environment. They can penetrate water treatment systems, enter multiple organs in the human body, and accumulate, leading to health problems such as metabolic disorders and endocrine imbalances. Therefore, accurately monitoring the content, particle size distribution, and chemical composition of microplastics in water bodies is crucial for assessing water environmental quality, analyzing the migration and transformation patterns of microplastics, and conducting ecological risk assessments. Currently, sampling and analysis techniques for microplastics in water bodies form the foundation of research in this field, but the overall technology is still under continuous development and improvement.

[0003] There are three main types of existing micro-nano plastic sampling devices for water bodies: cylindrical, bag-type, and cartridge-type. Cylindrical samplers have complex structures and cumbersome sample processing, which hinders their widespread adoption. Bag-type devices are difficult to install power units, making it hard to achieve on-site sampling of environmental water bodies. Cartridge-type graded sampling devices are large and heavy, and their sample processing is cumbersome, limiting their practical application.

[0004] Based on the above-mentioned current technology and taking into account the advantages and disadvantages, this invention aims to design and assemble a portable filter membrane grading device that is miniaturized, lightweight, easy to disassemble and assemble, suitable for large-volume sampling, and capable of multi-point continuous on-site sampling. This simplifies the experimental setup and sample processing procedures, and aims to improve the efficiency and accuracy of sampling. Utility Model Content

[0005] The purpose of this invention is to provide a portable sampling device for enriching micro- and nano-plastics in water, in order to overcome the shortcomings of existing technologies.

[0006] The technical solution provided by this utility model is as follows:

[0007] This utility model provides a portable micro-nano plastic enrichment sampling device in water, including a water pump (14), the water pump (14) is connected to an inlet pipe (15), the inlet pipe (15) is connected to a first filter (1), the first filter (1) is connected to a second filter (2) through a first connecting pipe (16), the second filter (2) is connected to a third filter (3) through a second connecting pipe (17), the third filter (3) is connected to an outlet pipe (19), and a flow meter (18) is installed on the outlet pipe (19);

[0008] The first filter (1) includes a first inlet filter head (8), a first sealing ring (20-1), a first glass fiber filter membrane (4), a first stainless steel support mesh (7-1), a second sealing ring (20-2), and a first outlet filter head (9) arranged in sequence. The first inlet filter head (8) is connected to the water inlet pipe (15), and the first outlet filter head (9) is connected to the first connecting pipe (16). The pore size of the first glass fiber filter membrane (4) is 100μm.

[0009] The second filter (2) includes a second inlet filter head (10), a third sealing ring (20-3), a second glass fiber filter membrane (5), a second stainless steel support mesh (7-2), a fourth sealing ring (20-4), and a second outlet filter head (11) arranged in sequence. The second inlet filter head (10) is connected to the first connecting pipe (16), and the second outlet filter head (11) is connected to the second connecting pipe (17). The pore size of the second glass fiber filter membrane (5) is 20 μm.

[0010] The third filter (3) includes a third inlet filter head (12), a fifth sealing ring (20-5), a third glass fiber filter membrane (6), a third stainless steel support mesh (7-3), a sixth sealing ring (20-6), and a third outlet filter head (13) arranged in sequence. The third inlet filter head (12) is connected to the second connecting pipe (17), and the third outlet filter head (13) is connected to the water outlet pipe (19). The pore size of the third glass fiber filter membrane (6) is 0.22 μm.

[0011] In one optional embodiment of this utility model, the first filter (1), the second filter (2) and the third filter (3) are all detachably connected by clamps.

[0012] In an optional embodiment of this utility model, the first glass fiber filter membrane (4) is fixed at the middle position between the first inlet filter head (8) and the first outlet filter head (9) by a clamp; the second glass fiber filter membrane (5) is fixed at the middle position between the second inlet filter head (10) and the second outlet filter head (11) by a clamp; and the third glass fiber filter membrane (6) is fixed at the middle position between the third inlet filter head (12) and the third outlet filter head (13) by a clamp.

[0013] Compared with the prior art, this utility model provides a portable sampling device for enriching micro-nano plastics in water, which has the following advantages:

[0014] (1) The present invention provides a portable water micro-nano plastic enrichment sampling device, comprising a first filter, a second filter, and a third filter; the first filter contains a first glass fiber filter membrane, the second filter contains a second glass fiber filter membrane, and the third filter contains a third glass fiber filter membrane; the pore size of the first glass fiber filter membrane is 100 μm, the pore size of the second glass fiber filter membrane is 20 μm, and the pore size of the third glass fiber filter membrane is 0.22 μm; based on the size characteristics of micro-nano plastics, the present invention, by setting glass fiber filter membranes with different pore sizes in the first filter, the second filter, and the third filter, can realize graded sampling of micro-nano plastics of different particle sizes in water, which is highly targeted and convenient for analyzing the distribution characteristics of micro-nano plastics in water.

[0015] (2) The portable micro-nano plastic enrichment sampling device in water body of this utility model includes a first filter, a second filter and a third filter; the first filter has a glass fiber filter membrane with a pore size of 100μm placed inside, and is detachably connected to the first inlet filter head and the first outlet filter head; the second filter has a glass fiber filter membrane with a pore size of 20μm placed inside, and is detachably connected to the second inlet filter head and the second outlet filter head; the third filter has a glass fiber filter membrane with a pore size of 0.22μm placed inside, and is detachably connected to the third inlet filter head and the third outlet filter head, so that it is convenient to replace glass fiber filter membranes with different pore sizes according to experimental needs.

[0016] (3) The water pump, inlet pipe, outlet pipe, inlet filter head, outlet filter head, connecting pipe and flow meter in the portable micro-nano plastic enrichment sampling device for water bodies of this utility model are all detachable. The equipment is flexible and simple to assemble, and it is convenient to inspect and replace specific parts, which reduces the difficulty and cost of maintenance. The detachable feature makes it easier to disassemble the parts and collect the samples after sampling, reducing the operation steps and time. In actual application, it can be used in a single or multiple linear series as needed. The overall process of the device is clear, the operation threshold is low, it is small and lightweight, easy to carry, and improves the sampling efficiency. The device is suitable for a variety of different water bodies and can perform large-volume water sample processing.

[0017] Given its advantages such as flexible structure, easy operation, and lightweight portability, the device can be quickly used in different scenarios such as laboratory simulation environment and field monitoring, and is suitable for various micro-nano plastic sampling needs such as scientific research and environmental monitoring, with a wide range of applications. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a portable water micro-nanoplastics enrichment sampling device provided in an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the structure of the first filter provided in an embodiment of this application.

[0021] Figure 3 This is a schematic diagram of the structure of the second filter provided in an embodiment of this application.

[0022] Figure 4 A schematic diagram of the structure of the third filter provided in an embodiment of this application.

[0023] Figure 5 This is a schematic diagram of the inlet or outlet filter head provided in the embodiments of this application.

[0024] Figure 6 This is a schematic diagram of the overall structure of the inlet filter head and outlet filter head provided in the embodiments of this application.

[0025] Figure 7 This is a schematic diagram of the overall structure of the inlet filter head and outlet filter head after being fixed by clamps, as provided in the embodiments of this application. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The terms "upper," "lower," "front," "rear," "left," and "right," etc., used when describing the installation position or direction of the structure or components in this embodiment are based on the orientation shown in the accompanying drawings. They are merely for convenience of description, used to distinguish the relative positions of various components or directions, and do not represent the orientation of the device or functional component in this embodiment during use.

[0027] like Figures 1-7 As shown, this utility model embodiment provides a portable micro-nano plastic enrichment sampling device in water, including a water pump 14, a water inlet pipe 15 connected to the water pump 14, a first filter 1 connected to the water inlet pipe 15, a second filter 2 connected to the first filter 1 through a first connecting pipe 16, a third filter 3 connected to the second filter 2 through a second connecting pipe 17, and an outlet pipe 19 connected to the third filter 3. A flow meter 18 is installed on the outlet pipe 19.

[0028] Figure 2 Combination Figure 1The first filter 1 includes a first inlet filter head 8, a first sealing ring 20-1, a first glass fiber filter membrane 4, a first stainless steel support mesh 7-1, a second sealing ring 20-2, and a first outlet filter head 9 arranged in sequence. The first inlet filter head 8 is connected to the water inlet pipe 15, and the first outlet filter head 9 is connected to the first connecting pipe 16. The pore size of the first glass fiber filter membrane 4 is 100μm.

[0029] Figure 3 Combination Figure 1 The second filter 2 includes a second inlet filter head 10, a third sealing ring 20-3, a second glass fiber filter membrane 5, a second stainless steel support mesh 7-2, a fourth sealing ring 20-4, and a second outlet filter head 11 arranged in sequence. The second inlet filter head 10 is connected to the first connecting pipe 16, and the second outlet filter head 11 is connected to the second connecting pipe 17. The pore size of the second glass fiber filter membrane 5 is 20μm.

[0030] Figure 4 Combination Figure 1 The third filter 3 includes a third inlet filter head 12, a fifth sealing ring 20-5, a third glass fiber filter membrane 6, a third stainless steel support mesh 7-3, a sixth sealing ring 20-6, and a third outlet filter head 13 arranged in sequence. The third inlet filter head 12 is connected to the second connecting pipe 17, and the third outlet filter head 13 is connected to the water outlet pipe 19. The pore size of the third glass fiber filter membrane 6 is 0.22μm.

[0031] Figure 5 and Figure 7 Combination Figure 1 In some embodiments, the first filter 1, the second filter 2, and the third filter 3 are all detachably connected by clamps. The first glass fiber filter membrane 4 is fixed by clamps at the midpoint between the first inlet filter head 8 and the first outlet filter head 9; the second glass fiber filter membrane 5 is fixed by clamps at the midpoint between the second inlet filter head 10 and the second outlet filter head 11; and the third glass fiber filter membrane 6 is fixed by clamps at the midpoint between the third inlet filter head 12 and the third outlet filter head 13. Figure 7 The clamp 21 in the middle can be a KF vacuum clamp.

[0032] Figure 5 and Figure 6 Combination Figure 1 In some embodiments, the first inlet filter head 8 and the first outlet filter head 9 can also be connected by threads, the second inlet filter head 10 and the second outlet filter head 11 can also be connected by threads, and the third inlet filter head 12 and the third outlet filter head 13 can also be connected by threads.

[0033] In some embodiments, the first connecting pipe 16 is detachably connected at both ends to the first outlet filter head 9 and the second inlet filter head 10, respectively. The second connecting pipe 17 is detachably connected at both ends to the second outlet filter head 11 and the third inlet filter head 12, respectively. A first sealing ring 20-1 and a second sealing ring 20-2 are provided at the connection between the first inlet filter head 8 and the first outlet filter head 9 to achieve a seal at the connection. A third sealing ring 20-3 and a fourth sealing ring 20-4 are provided at the connection between the second inlet filter head 10 and the second outlet filter head 11 to achieve a seal at the connection. A fifth sealing ring 20-5 and a sixth sealing ring 20-6 are provided at the connection between the third inlet filter head 12 and the third outlet filter head 13 to achieve a seal at the connection.

[0034] In some embodiments, a first stainless steel support mesh 7-1 is placed after the first glass fiber filter membrane 4 to provide filter membrane support and achieve uniform water flow distribution; a second stainless steel support mesh 7-2 is placed after the second glass fiber filter membrane 5 to provide filter membrane support and achieve uniform water flow distribution; and a third stainless steel support mesh 7-3 is placed after the third glass fiber filter membrane 6 to provide filter membrane support and achieve uniform water flow distribution.

[0035] This utility model of a portable water micro-nano plastic enrichment sampling device includes a first filter 1, a second filter 2, and a third filter 3. The first filter 1 contains a first glass fiber filter membrane 4, the second filter 2 contains a second glass fiber filter membrane 5, and the third filter 3 contains a third glass fiber filter membrane 6. In use, water containing micro-nanoplastics in the environment flows sequentially through the inlet pipe 15 and the first inlet filter head 8 into the first filter 1. When it passes through the first glass fiber filter membrane 4, the first glass fiber filter membrane 4 filters the water. The filtered water then passes through the first stainless steel support mesh 7-1, the first outlet filter head 9, the first connecting pipe 16, and the second inlet filter head 10 into the second filter 2. When it passes through the second glass fiber filter membrane 5, the second glass fiber filter membrane 5 filters the water. The filtered water then passes through the second stainless steel support mesh 7-2, the second outlet filter head 11, the second connecting pipe 17, and the third inlet filter head 12 into the third filter 3. When it passes through the third glass fiber filter membrane 6, the third glass fiber filter membrane 6 filters the water. The filtered water then flows out through the third stainless steel support mesh 7-3 and the third outlet filter head 13. This can be understood as follows: the first glass fiber membrane 4 in the first filter 1 collects micro-nanoplastics with a particle size greater than 100 μm. By analyzing the first glass fiber membrane 4 in the first filter 1, the concentration of micro-nanoplastics with a particle size greater than 100 μm can be detected. The second glass fiber membrane 5 in the second filter 2 collects micro-nanoplastics with a particle size greater than 20 μm and less than 100 μm. By analyzing the second glass fiber membrane 5 in the second filter 2, the concentration of micro-nanoplastics with a particle size greater than 20 μm and less than 100 μm can be detected. The micro-nanoplastics collected by the third glass fiber membrane 6 in the third filter 3 have a particle size of less than 20 μm and greater than 0.22 μm. Analysis of the third glass fiber membrane 6 in the third filter 3 can detect the concentration of micro-nanoplastics with a particle size of less than 20 μm and greater than 0.22 μm. Meanwhile, the micro-nanoplastics in the water flowing out of the third outlet filter head 13 have a particle size of less than 0.22 μm. Analysis of the water flowing out of the third outlet filter head 13 can detect the concentration of micro-nanoplastics with a particle size of less than 0.22 μm. This invention, by setting glass fiber membranes with different pore sizes in the first filter 1, second filter 2, and third filter 3, can achieve graded sampling of micro-nanoplastics of different particle sizes in water. It is suitable for various types of water and can collect micro-nanoplastics with very small particle sizes. Furthermore, this invention is lightweight and portable, allowing for the sampling and processing of large-volume water samples.

[0036] In some embodiments, the first glass fiber filter membrane 4 is detachably connected to the first inlet filter head 8 and the first outlet filter head 9. The second glass fiber filter membrane 5 is detachably connected to the second inlet filter head 10 and the second outlet filter head 11. The third glass fiber filter membrane 6 is detachably connected to the third inlet filter head 12 and the third outlet filter head 13. The first inlet filter head 8 and the first outlet filter head 9 are both disposed on the first filter 1. The second inlet filter head 10 and the second outlet filter head 11 are both disposed on the second filter 2. The third inlet filter head 12 and the third outlet filter head 13 are both disposed on the third filter 3. The first filter 1, the second filter 2, and the third filter 3 are all chuck-shaped and are detachably connected by clamps 21, which allows for detachable assembly and facilitates the replacement and assembly of the first glass fiber filter membrane 4, the second glass fiber filter membrane 5, and the third glass fiber filter membrane 6 within the first filter 1, the second filter 2, and the third filter 3.

[0037] In some embodiments, the first outlet filter head 9 and the second inlet filter head 10 are connected by a first connecting pipe 16. The second outlet filter head 11 and the third inlet filter head 12 are connected by a second connecting pipe 17. The two ends of the first connecting pipe 16 are detachably connected to the first outlet filter head 9 and the second inlet filter head 10, respectively. The two ends of the second connecting pipe 17 are detachably connected to the second outlet filter head 11 and the third inlet filter head 12, respectively.

[0038] In the above embodiments, the first connecting pipe 16 is detachably connected to the first outlet filter head 9 and the second inlet filter head 10 respectively by clamps. The two ends of the first connecting pipe 16 can also be detachably connected to the first outlet filter head 9 and the second inlet filter head 10 respectively by threaded connection. The second connecting pipe 17 is detachably connected to the second outlet filter head 11 and the third inlet filter head 12 respectively by clamps. The two ends of the second connecting pipe 17 can also be detachably connected to the third inlet filter head 12 and the second outlet filter head 11 respectively by threaded connection.

[0039] In some embodiments, the system further includes an inlet pipe 15, which is detachably connected to the end of the first inlet filter head 8; a water pump 14 is mounted on the inlet pipe 15. In the above embodiments, the end of the inlet pipe 15 and the end of the first inlet filter head 8 can be detachably connected by a clamp; the end of the inlet pipe 15 and the end of the first inlet filter head 8 can also be detachably connected by a threaded connection. The water pump 14 can be a peristaltic pump, a vortex pump, or other existing water pumps. The specific type of water pump used is selected based on the actual sampling environment.

[0040] In some embodiments, the system further includes an outlet pipe 19, which is detachably connected to the end of the third outlet filter head 13; a flow meter 18 is provided on the outlet pipe 19. In the above embodiments, the end of the outlet pipe 19 and the end of the third outlet filter head 13 can be detachably connected by a clamp; the end of the outlet pipe 19 and the end of the third outlet filter head 13 can also be detachably connected by a threaded connection.

[0041] In the above embodiments, the inlet pipe 14, outlet pipe 19, first connecting pipe 16, and second connecting pipe 17 are all detachably connected; the first filter 1, second filter 2, and third filter 3 each include a detachably connected first inlet filter head 8 and first outlet filter head 9, second inlet filter head 10 and second outlet filter head 11, and third inlet filter head 12 and third outlet filter head 13; the first glass fiber filter membrane 4 is detachably connected to the first inlet filter head 8 and first outlet filter head 9, the second glass fiber filter membrane 5 is detachably connected to the second inlet filter head 10 and second outlet filter head 11, and the third glass fiber filter membrane 6 is detachably connected to the third inlet filter head 12 and third outlet filter head 13; thus, each component is detachable, the structure is flexible, it is easy to carry and maintain, and it is suitable for various scenarios. When in use, it can be assembled into a suitable sampling device according to the water conditions and experimental requirements, thereby improving work efficiency.

[0042] refer to Figure 1 The flowchart of the micro-nanoplastics sampling device shown is as follows: Water containing micro-nanoplastics in the environment flows into the inlet pipe 15 under the action of the water pump 14, enters the first filter 1 through the first inlet filter head 8, filters the water through the first glass fiber filter membrane 4, and the filtered water enters the second filter 2 through the first stainless steel support mesh 7-1, the first outlet filter head 9, the first connecting pipe 16, and the second inlet filter head 10. The second glass fiber filter membrane 5 filters the water, and the filtered water enters the third filter 3 through the second stainless steel support mesh 7-2, the second outlet filter head 11, the second connecting pipe 17, and the third inlet filter head 12. The third glass fiber filter membrane 6 filters the water, and the water flows out to the outlet pipe 19 through the third stainless steel support mesh 7-3 and the third outlet filter head 13. Figure 1The middle arrow indicates the direction of water flow. During sampling, the flow meter 18 on the outlet pipe 19 can monitor the flow velocity of the water in the outlet pipe 19. Analyzing the first glass fiber filter membrane 4 in the first filter 1 can determine the concentration of micro-nano plastics with a size greater than 100 μm in the water. Analyzing the second glass fiber filter membrane 5 in the second filter 2 can determine the concentration of micro-nano plastics with a size greater than 20 μm and less than 100 μm in the water. Analyzing the third glass fiber filter membrane 6 in the third filter 3 can determine the concentration of micro-nano plastics with a size greater than 0.22 μm and less than 20 μm in the water. After sampling, the first filter 1, the second filter 2, and the third filter 3 are opened respectively, and the first glass fiber filter membrane 4, the second glass fiber filter membrane 5, and the third glass fiber filter membrane 6 are replaced to allow for sampling of new water bodies.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A portable sampling device for enriching micro-nano plastics in water, characterized in that, Includes a water pump (14), the water pump (14) is connected to an inlet pipe (15), the inlet pipe (15) is connected to a first filter (1), the first filter (1) is connected to a second filter (2) through a first connecting pipe (16), the second filter (2) is connected to a third filter (3) through a second connecting pipe (17), the third filter (3) is connected to an outlet pipe (19), and a flow meter (18) is installed on the outlet pipe (19); The first filter (1) includes a first inlet filter head (8), a first sealing ring (20-1), a first glass fiber filter membrane (4), a first stainless steel support mesh (7-1), a second sealing ring (20-2), and a first outlet filter head (9) arranged in sequence. The first inlet filter head (8) is connected to the water inlet pipe (15), and the first outlet filter head (9) is connected to the first connecting pipe (16). The pore size of the first glass fiber filter membrane (4) is 100μm. The second filter (2) includes a second inlet filter head (10), a third sealing ring (20-3), a second glass fiber filter membrane (5), a second stainless steel support mesh (7-2), a fourth sealing ring (20-4), and a second outlet filter head (11) arranged in sequence. The second inlet filter head (10) is connected to the first connecting pipe (16), and the second outlet filter head (11) is connected to the second connecting pipe (17). The pore size of the second glass fiber filter membrane (5) is 20 μm. The third filter (3) includes a third inlet filter head (12), a fifth sealing ring (20-5), a third glass fiber filter membrane (6), a third stainless steel support mesh (7-3), a sixth sealing ring (20-6), and a third outlet filter head (13) arranged in sequence. The third inlet filter head (12) is connected to the second connecting pipe (17), and the third outlet filter head (13) is connected to the water outlet pipe (19). The pore size of the third glass fiber filter membrane (6) is 0.22 μm.

2. The portable water micro-nano plastic enrichment sampling device according to claim 1, characterized in that, The first filter (1), the second filter (2) and the third filter (3) are all detachably connected by clamps.

3. The portable water micro-nano plastic enrichment sampling device according to claim 2, characterized in that, The first glass fiber filter membrane (4) and the first stainless steel support mesh (7-1) are fixed at the middle position of the first inlet filter head (8) and the first outlet filter head (9) by clamps; the second glass fiber filter membrane (5) and the second stainless steel support mesh (7-2) are fixed at the middle position of the second inlet filter head (10) and the second outlet filter head (11) by clamps; the third glass fiber filter membrane (6) and the third stainless steel support mesh (7-3) are fixed at the middle position of the third inlet filter head (12) and the third outlet filter head (13) by clamps.

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