In-situ multi-connection grading rapid sampling and separating device for micro-plastics

Abstract

The utility model discloses an in-situ multi-connection grading rapid sampling and separating device for micro-plastics. The in-situ multi-connection grading rapid sampling and separating device comprises a first-stage treatment device, a second-stage treatment device and a plurality of collecting bottles, each of the first-stage treatment device and the second-stage treatment device is composed of a three-neck bottle, a vacuum pump, a water collecting tank and a valve; the first-stage treatment device is provided with a first water inlet bin, and the second-stage treatment device is provided with a second water inlet bin; the first-stage treatment device and the second-stage treatment device are both detachable parts and can be conveniently assembled and completed on site in a water area; according to the utility model, the first-stage treatment device is used for carrying out first-stage separation on micro-plastics, and the second-stage treatment device is used for carrying out second-stage or multi-stage separation on the micro-plastics; according to the portable water quality detection device, water sample collection is carried out in the field, micro-plastic in a water sample is filtered in a water area field, grading can be further completed while filtering is carried out, the water quality detection efficiency is greatly improved, and the portable water quality detection device has the advantages of being convenient to carry, easy to install and capable of completing filtering and grading.

Description

Technical Field

[0001] The utility model relates to the technical fields of environmental protection and water quality detection, in particular to an in-situ multi-connected grading rapid sampling and separation device for microplastics. Background Art

[0002] Water quality detection is an important link for environmental protection departments to manage and evaluate water quality. In the prior art, during water quality detection, due to the inconvenience of carrying detection equipment, water quality detection workers often need to collect water samples in the wild, and then bring a large number of water sample collection bottles back to the laboratory for detection. For the determination of microplastics in water samples through filtration and further grading, during the determination process, only the microplastics retained on different density filter membranes need to be separated, and the remaining water body has no other function. Bringing a large number of water samples back to the laboratory will obviously increase the burden on sampling personnel, with the defects of high labor intensity, long detection cycle, reduced detection efficiency, and increased detection cost.

[0003] In addition, for water samples collected in the wild environment, there will be more impurities interfering. With the improvement of the standard for the determination of microplastics in water quality, when processing water quality detection samples, it is also necessary to perform multi-stage separation of microplastics. For example, for a certain water area, it is necessary to separate the content of small-sized microplastics with a size of 20 μm to 330 μm. The problem is how to implement water sample collection in the wild, filter the microplastics in the water sample on-site in the water area, and further complete grading while filtering, which will greatly improve the efficiency of water quality detection work. Therefore, it is very necessary to design a device for filtering and grading water samples, which is portable, easy to install, and can complete filtering and grading. Summary of the Invention

[0004] The purpose of the utility model is to provide an in-situ multi-connected grading rapid sampling and separation device for microplastics in view of the deficiencies of the prior art. The device includes a first-stage treatment device, a second-stage treatment device, and several collection bottles. The first-stage treatment device and the second-stage treatment device of the utility model are both composed of a three-necked flask, a vacuum pump, a water collection tank, and a valve. A first water inlet chamber is arranged in the first-stage treatment device, and a second water inlet chamber is arranged in the second-stage treatment device.

[0005] The first-stage treatment device and the second-stage treatment device of the utility model are both detachable parts, which are convenient to be assembled on-site in the water area.

[0006] The first-stage treatment device of the utility model has the vacuum pump connected to the air extraction port of the three-necked flask. The water outlet of the first water inlet chamber is sequentially connected to the valve and the water inlet of the three-necked flask through a hose, and the water collection tank is connected to the water drainage port of the three-necked flask.

[0007] The second-stage treatment device of the present utility model is connected by connecting the vacuum pump to the air extraction port of the three-necked flask. The second water outlet of the second water inlet chamber is sequentially connected to the valve and the water inlet of the three-necked flask through a hose, and the water collection tank is connected to the water drainage port of the three-necked flask;

[0008] In the present utility model, filter membranes of different diameters are installed in the filter membrane clamp of the collection bottle, and the collection bottle is arranged on the first collection bottle seat of the first water inlet chamber and the second collection bottle seat of the second water inlet chamber through a hollow bottle stopper.

[0009] The present utility model performs primary separation of microplastics through the first-stage treatment device and secondary or multi-stage separation of microplastics through the second-stage treatment device;

[0010] The present utility model solves the problems of implementing water sample collection in the wild, filtering microplastics in the water sample at the water area site, and further completing classification while filtering. The present utility model will greatly improve the efficiency of water quality detection work, and has the advantages of being portable, easy to install, and capable of completing filtration and classification.

[0011] The technical solution for achieving the purpose of the present utility model is:

[0012] The present utility model includes a first-stage treatment device, a second-stage treatment device, and a collection bottle;

[0013] The first-stage treatment device is composed of a three-necked flask, a vacuum pump, a water collection tank, a valve, and a first water inlet chamber. The top of the three-necked flask is provided with an air extraction port, the body of the flask is provided with a water inlet, and the bottom of the flask is provided with a water drainage port; the top of the first water inlet chamber is provided with a first collection bottle seat, the bottom is provided with a first water outlet and a hose;

[0014] The vacuum pump is connected to the air extraction port of the three-necked flask. The water outlet of the first water inlet chamber is sequentially connected to the valve and the water inlet of the three-necked flask through a hose, and the water collection tank is connected to the water drainage port of the three-necked flask;

[0015] The second-stage treatment device is composed of a three-necked flask, a vacuum pump, a water collection tank, a valve, and a second water inlet chamber. The top of the second water inlet chamber is provided with three second collection bottle seats side by side, and the bottoms of the three collection bottle seats are all provided with second water outlets, and the second water outlets are connected through a hose; the vacuum pump is connected to the air extraction port of the three-necked flask. The second water outlet of the second water inlet chamber is sequentially connected to the valve and the water inlet of the three-necked flask through a hose, and the water collection tank is connected to the water drainage port of the three-necked flask;

[0016] The mouth of the collection bottle is provided with a filter membrane clamp and a hollow bottle stopper. There are several collection bottles, and the collection bottles are arranged on the first collection bottle seat of the first water inlet chamber and the second collection bottle seat of the second water inlet chamber through the hollow bottle stopper. Description of the Drawings

[0017] Figure 1It is a schematic structural diagram of the first-stage treatment device of the present utility model;

[0018] Figure 2 It is a schematic structural diagram of the second-stage treatment device of the present utility model;

[0019] Figure 3 It is a schematic structural diagram of the sampling bottle of the present utility model. Specific embodiments

[0020] The following further elaborates the present utility model in conjunction with specific embodiments. It should be understood that these examples are only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the present utility model, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0021] The present utility model works as follows:

[0022] On-site assembly of the device:

[0023] Refer to Figure 1 , Figure 2 , Figure 3 To complete the on-site assembly work of the first-stage treatment device 1 and the second-stage treatment device 2 at the site of the water area to be sampled;

[0024] The first-stage treatment device 1 of the present utility model is connected by the vacuum pump 5 to the air extraction port 41 of the three-necked flask 4. The water outlet 12 of the first water inlet chamber 10 is connected to the water inlet 42 of the three-necked flask 4 through a hose in sequence, and the water collection tank 6 is connected to the water drainage port 43 of the three-necked flask 4;

[0025] The second-stage treatment device 2 of the present utility model is connected by the vacuum pump 5 to the air extraction port 41 of the three-necked flask 4. The second water outlet 22 of the second water inlet chamber 20 is connected to the water inlet 42 of the three-necked flask 4 through a hose in sequence, and the water collection tank 6 is connected to the water drainage port 43 of the three-necked flask 4;

[0026] Connect the vacuum pump 5 to the electric control box; first, use pure water for suction filtration work to clean the entire device, check the connection of each component, drain the residual liquid in the device, and check the airtightness of the vacuum pump 5 and the device.

[0027] Use the first-stage treatment device 1 to perform primary separation of microplastics:

[0028] Refer to Figure 1 , Figure 3 Select a sampling bottle 3, inject the water sample to be detected, install a 330 μm filter membrane in the filter membrane clip 31 of the sampling bottle 3, and assemble the hollow bottle stopper 32 for use;

[0029] Close valve 7, install the sampling bottle 3 equipped with a 330μm filter membrane on the first sampling bottle seat 11 of the first water inlet chamber 10, and keep the hollow bottle stopper 32 sealed with the first sampling bottle seat 11; check that the clip of the filter membrane clamp 31 is tightly fastened to prevent liquid leakage;

[0030] Open valve 7 and turn on the vacuum pump 5 to filter the water sample in the sampling bottle 3 until all the water sample in the sampling bottle 3 flows into the water collection tank 6 through the 330μm filter membrane, the first sampling bottle seat 11, and the three-necked flask 4;

[0031] Close valve 7 and turn off the vacuum pump 5, remove the filter membrane clamp 31 on the sampling bottle 3, record and seal it, and wait for inspection of the microplastics filtered out on the 330μm filter membrane to complete the primary separation.

[0032] Use the secondary treatment device 2 to perform secondary separation on the microplastics:

[0033] Refer to Figure 2 、 Figure 3 Select three sampling bottles 3, evenly inject the water sample flowing into the water collection tank 6 after the primary separation into the three sampling bottles 3, install filter membranes of 250μm, 100μm, and 20μm respectively in the filter membrane clamps 31 of the three sampling bottles 3, and respectively assemble hollow bottle stoppers 32 for standby;

[0034] Close valve 7, and successively install the sampling bottles 3 equipped with 250μm, 100μm, and 20μm filter membranes on the three second sampling bottle seats 21 of the second water inlet chamber 20,

[0035] Keep the hollow bottle stopper 32 sealed with the second sampling bottle seat 21; check that the clip of the filter membrane clamp 31 is tightly fastened to prevent liquid leakage;

[0036] Open valve 7 and turn on the vacuum pump 5 to filter the water samples in the three sampling bottles 3 until all the water samples in their respective sampling bottles 3 flow into the water collection tank 6 through the 250μm, 100μm, and 20μm filter membranes, the first sampling bottle seat 11, and the three-necked flask 4;

[0037] Close valve 7 and turn off the vacuum pump 5, remove the filter membrane clamp 31 on the sampling bottle 3, record and seal it, and wait for inspection of the microplastics filtered out on the 250μm, 100μm, and 20μm filter membranes to complete the secondary or multi-stage separation.

[0038] Perform hierarchical determination on the filter membrane:

[0039] Back in the laboratory, for the filter membranes of each aperture, the intercepted microplastics on them were separately taken out, put into blue-capped bottles, and 500 ml of pure water was added to prepare four different solutions. During the detection, the liquid in the bottle was shaken well, a drop was sucked out with a disposable straw and placed on a glass slide, observed and photographed with a microscope, and the photographed pictures were analyzed with imageJ to calculate the size of each particle and count the proportion of microplastics in each level.

[0040] As needed, multiple water samples can be collected and multiple filtrations and classifications can be carried out to accurately judge the microplastic residues in this water area and achieve the purpose of multi-stage fractional retention of microplastics; the utility model solves the problems of collecting water samples in the wild, filtering the microplastics in the water samples at the water area site, and further completing classification while filtering. The utility model will greatly improve the efficiency of water quality detection work and has the advantages of being portable, easy to install and capable of completing filtration and classification.

Claims

1. An in-situ multi-link classification rapid sampling and separation device for microplastics, characterized in that: The device comprises a first-stage processing device (1), a second-stage processing device (2) and a collection bottle (3); The first-stage processing device (1) is composed of a three-necked bottle (4), a vacuum pump (5), a water collecting box (6), a valve (7) and a first water inlet bin (10); the three-necked bottle (4) is provided with an air extraction port (41) on the top, a water inlet (42) on the body and a water discharge port (43) on the bottom; the first water inlet bin (10) is provided with a first collection bottle seat (11) on the top and a first water outlet (12) and a hose on the bottom; The vacuum pump (5) is connected to the air extraction port (41) of the three-necked bottle (4); the water outlet (12) of the first water inlet tank (10) is connected to the valve (7) and the water inlet (42) of the three-necked bottle (4) in sequence through a hose; and the water collecting tank (6) is connected to the water outlet (43) of the three-necked bottle (4); The second-stage treatment device (2) is composed of a three-necked bottle (4), a vacuum pump (5), a water collecting box (6), a valve (7) and a second water inlet bin (20); three second collection bottle seats (21) are arranged side by side on the top of the second water inlet bin (20); the bottoms of the three collection bottle seats are each provided with a second water outlet (22), and the second water outlets (22) are connected via a hose; the vacuum pump (5) is connected to the air extraction port (41) of the three-necked bottle (4); the second water outlet (22) of the second water inlet bin (20) is connected to the valve (7) and the water inlet (42) of the three-necked bottle (4) in sequence via a hose; and the water collecting box (6) is connected to the water outlet (43) of the three-necked bottle (4); A filter membrane clamp (31) and a hollow bottle stopper (32) are provided on the bottle mouth of the collection bottle (3). The collection bottle (3) is composed of several pieces. The collection bottle (3) is arranged on a first collection bottle seat (11) of the first water inlet bin (10) and on a second collection bottle seat (21) of the second water inlet bin (20) via the hollow bottle stopper (32).

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