Device for collecting micro-plastics in air dust fall
By designing a microplastic collection device for air dust reduction, and using the collection liquid and filter membrane components, the problem of poor microplastic collection effect in the prior art is solved, and efficient and accurate microplastic collection and separation are achieved.
Patent Information
- Application Number
- CN202421535720.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-02
AI Technical Summary
When collecting atmospheric microplastics, the prior art causes poor collection results due to weather and wind, and the actual settlement and statistical results are inaccurate, affecting the evaluation results of atmospheric microplastics.
A microplastic collection device in air dust reduction is designed, including a collector and a microplastic separator. The collector contains the collection liquid, the microplastic particles are insoluble in liquid, and a drain pipe and valve are installed at the bottom. The microplastic separator is equipped with a filter membrane assembly and a lifting rack to filter and separate the microplastic particles.
By using the collection liquid to capture microplastics, avoiding the influence of wind, the stability and accuracy of the collection effect are ensured. The design of the filter membrane module realizes effective filtration and separation of microplastics, with a simple structure and easy to carry and use.
Smart Images
Figure CN222850349U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of microplastic collection, in particular to a device for collecting microplastics in air dust fall. Background Art
[0002] Microplastics are a newly discovered organic pollutant that has become one of the global environmental issues of concern, especially atmospheric microplastic pollution, which has become a recent hot topic. According to research, synthetic fibers, mixed fibers, natural polymers (rayon, cellulose acetate, etc.) and natural fibers (cotton, wool, etc.) exist in the atmosphere. These air microplastic (fiber) pollution is an important source of microplastics in the atmospheric environment. Microplastics in the atmospheric environment will settle on land and can also be transported to the ocean through the atmosphere, causing microplastic pollution on the earth's water surface.
[0003] Atmospheric microplastic pollution can also directly harm human health. After entering the human body, microplastics in the atmosphere will accumulate in the lungs, causing lung diseases. They will also enter other organs. Some small-sized microplastics can even directly enter the blood and be transmitted to various parts of the human body through the blood. Moreover, microplastics can absorb other pollutants, further increasing the harm caused by microplastics. In addition, due to their small size, microplastics are very easy to be accidentally ingested by organisms in the environment and transmitted through the food chain. It can be seen that microplastics are not only the source of pollutants, but also the carrier of pollutants. In view of this, it is necessary to further study the fate of atmospheric microplastics and their harm to the ecological environment.
[0004] At present, the main method of studying atmospheric microplastic pollution and its distribution patterns is to explore atmospheric microplastic pollution and assess its impact on land and sea environments. However, the current devices for collecting atmospheric microplastics still have shortcomings: the actual sampling operation requires long-term continuous sampling and monitoring, and the device is affected by the weather. Excessive wind causes the settled samples to escape from the device, resulting in poor collection results, inaccurate actual sedimentation and statistical results, and affecting the assessment results of atmospheric microplastics. Utility Model Content
[0005] The purpose of the utility model is to provide a device for collecting microplastics in air dust to solve the problems existing in the above-mentioned prior art, ensure good collection effect, ensure collection accuracy, and be simple and convenient to carry and use.
[0006] To achieve the above purpose, the utility model provides the following solutions:
[0007] The utility model provides a device for collecting microplastics in air dust, comprising a collector and a microplastic separator; the collector contains a collecting liquid, and microplastic particles are insoluble in the collecting liquid; a drain pipe is arranged at the bottom of the collector, and a valve that can be opened and closed is arranged on the drain pipe; the microplastic separator has a top opening, a accommodating cavity and a bottom drain port; the top opening and the bottom drain port are both connected to the accommodating cavity; the end of the drain pipe is located above the top opening, and a filter membrane component for filtering is arranged in the accommodating cavity, and the filter membrane component can intercept microplastic particles.
[0008] Preferably, a filter screen is fixedly disposed in the collector, and the filter screen is immersed in the collection liquid.
[0009] Preferably, a lifting frame is also provided at the bottom of the microplastic separator; the lifting frame can synchronously adjust the height positions of the microplastic separator and the collector.
[0010] Preferably, a protective cover is provided on the outer side of the microplastic separator, the collector is fixedly arranged at the upper opening of the protective cover, and the drain pipe is located inside the protective cover.
[0011] Preferably, a long opening is provided on the side wall of the protective cover, and the ends of the long opening are flush with the corresponding ends of the protective cover; a part of the knob of the valve passes through the long opening and is located outside the protective cover; a bottom drain pipe is provided at the bottom of the microplastic separator, and the end opening of the bottom drain pipe is the bottom drain port; the end of the bottom drain pipe passes through the long opening and is located outside the protective cover.
[0012] Preferably, the filter membrane assembly comprises a plurality of filter membranes, each of which is arranged in parallel, and the size of the filter holes of each of which gradually decreases in a direction from approaching to moving away from the collector.
[0013] Preferably, the lifting frame includes a support frame, a fixed tube, a telescopic tube and a fixed plate; the support frame is fixedly arranged at the lower end of the fixed tube, and the support frame includes a plurality of supporting legs; the lower end of the telescopic tube is inserted into the fixed tube through the upper end opening of the fixed tube, and the upper end of the telescopic tube is fixedly connected to the fixed plate; a plurality of through holes are arranged on the telescopic tube and the fixed tube along the height direction, and a connecting pin can be inserted into one of the through holes of the telescopic tube and one of the through holes on the fixed tube; the microplastic separator can be fixed on the fixed plate.
[0014] Preferably, the end of each supporting leg is configured as a pointed end or is provided with a suction cup.
[0015] Preferably, the microplastic separator comprises a plurality of upper cylinders and a lower cylinder; filter plates are provided in the upper cylinders and the lower cylinders, and a filter membrane is placed on the filter plates; the lower end of the upper cylinder can be plugged and fixed to the upper end of another upper cylinder or to the upper end of the lower cylinder; the lower end of the lower cylinder is connected and communicated with the drainage pipe.
[0016] Preferably, a protrusion is fixedly provided on the outer side wall of each upper cylinder.
[0017] Compared with the prior art, the utility model has achieved the following technical effects:
[0018] The utility model provides a plastic collection device for air dust reduction. By adding collection liquid in the collector, microplastic particles settled in the air can fall on the collection liquid and settle in the collection liquid. At this time, even if the wind blows, the microplastic particles collected in the collector will not be blown out, thereby avoiding the problem that the collected microplastic particles cannot be better settled due to the influence of wind or the secondary escape, thereby ensuring a good collection effect and ensuring the collection accuracy; by opening the valve on the drain pipe, the collection liquid can flow into the microplastic separator, and the filtration of the filter membrane component can be used to achieve the filtration and collection of the microplastic particles; the structure is simple, and it is easy and convenient to carry and use.
[0019] Furthermore, the filter provided in the collector can perform preliminary filtration on the dust in the air to prevent some large plastic or non-plastic impurities from entering.
[0020] Furthermore, the setting of the lifting frame can adjust the height of the collector and the microplastic separator, so as to conduct collection research on microplastic particles in air sedimentation at different heights.
[0021] Furthermore, the provision of a protective cover can protect the microplastic separator and reduce the impact of external interferences falling into the microplastic separator and affecting the content of microplastic particles on the filter membrane assembly.
[0022] Furthermore, the long opening on the protective cover can fix the collector and the microplastic separator, limit their circumferential rotation, and ensure their stability; and the valve knob is located outside the protective cover, which can facilitate the operator to rotate and adjust.
[0023] Furthermore, multiple filter membranes are provided, and the filter holes of the filter membranes are gradually reduced from top to bottom, which can grade and separate the microplastic particles and reduce the subsequent grade and separation steps.
[0024] Furthermore, the lifting frame is composed of a support frame, a fixed tube, a telescopic tube and a fixed plate, and has a simple structure, is easy to adjust, and is overall stable and reliable.
[0025] Furthermore, the end of the supporting leg can be set as a pointed end or a suction cup, so that it can be suitable for different sampling scenarios.
[0026] Furthermore, the microplastic separator is composed of multiple upper cylinders and one lower cylinder, and has a simple structure, which is convenient for adding or removing filter membranes according to the needs of different layers. It has a simple structure and is easy to install and use.
[0027] Furthermore, the arrangement of the raised portion of the upper cylinder can cooperate with the long opening provided on the protective cover, thereby facilitating the limitation of the circumferential rotation of the upper cylinder and ensuring its stability during use. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0029] Figure 1 This is a schematic diagram of the overall structure of the device for collecting microplastics in air dust provided by the utility model;
[0030] Figure 2 A schematic diagram of the structure of a collector in the device for collecting microplastics in air dust provided by the utility model;
[0031] Figure 3 A schematic diagram of the structure of the filter screen in the device for collecting microplastics in air dust provided by the utility model;
[0032] Figure 4 A schematic diagram of the structure of a protective cover in a device for collecting microplastics in air dust provided by the utility model;
[0033] Figure 5 This is a schematic diagram of the structure of a microplastic separator of a microplastic collection device in air dust provided by the utility model;
[0034] Figure 6 This is a schematic structural diagram of the lifting frame in the device for collecting microplastics in air dust provided by the utility model.
[0035] In the figure:
[0036] 100-Microplastic collection device in air dust;
[0037] 10-collector; 11-drain pipe; 12-valve; 13-knob; 14-filter;
[0038] 20-protective cover; 21-long opening;
[0039] 30-microplastic separator; 31-upper cylinder; 311-protrusion; 32-filter membrane; 33-lower cylinder; 34-bottom drain pipe;
[0040] 40 - lifting frame; 41 - supporting frame; 42 - fixing pipe; 43 - telescopic pipe; 44 - fixing plate; 45 - connecting pin; 46 - suction cup. DETAILED DESCRIPTION
[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0042] The purpose of the utility model is to provide a device for collecting microplastics in air dust to solve the problems existing in the prior art, ensure good collection effect, ensure collection accuracy, and be simple and convenient to carry and use.
[0043] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0044] Embodiment 1
[0045] This embodiment provides a device 100 for collecting microplastics in air dust. Figure 1 to Figure 6 As shown, it includes a collector 10 and a microplastic separator 30; the collector 10 contains a collecting liquid, and the microplastic particles are insoluble in the collecting liquid; a drain pipe 11 is arranged at the bottom of the collector 10, and a valve 12 that can be opened and closed is arranged on the drain pipe 11; the microplastic separator 30 has a top opening, a accommodating cavity and a bottom drain port; the top opening and the bottom drain port are both connected to the accommodating cavity; the end of the drain pipe 11 is located above the top opening, and a filter membrane assembly for filtration is arranged in the accommodating cavity, and the filter membrane assembly can intercept microplastic particles.
[0046] By adding collecting liquid in the collector 10, the microplastic particles settled in the air can fall on the collecting liquid and settle in the collecting liquid. At this time, even if the wind blows, the microplastic particles collected in the collector 10 will not be blown out, avoiding the problem that the collected microplastic particles cannot be better settled or escaped secondary due to the influence of wind; and on rainy days, the valve 12 on the drain pipe 11 can be opened to allow the collecting liquid in the collector 10 and the received rainwater to flow through the filter membrane assembly of the microplastic separator 30 and be discharged in time, reducing the problem of rainwater overflowing and taking away part of the microplastic particle samples, ensuring a good collection effect, and ensuring the collection accuracy; by opening the valve 12 on the drain pipe 11, the collecting liquid can flow into the microplastic separator 30, and the filtering of the microplastic particles can be achieved through the filtering of the filter membrane assembly; it has a simple structure, and is easy and convenient to carry and use; the entire device is not affected by weather, can accurately sample, is suitable for large-scale production applications, and is conducive to promoting the research work on microplastic particles in ambient air dust.
[0047] Among them, the relevant settings of the collector 10 are:
[0048] Specifically, the collector 10 is funnel-shaped, with a circular tube at the top, a cone in the middle, and a drainage pipe 11 at the bottom, which can maximize the capture of microplastic particles in the air.
[0049] Among the optional solutions of this embodiment, it is more preferred that Figure 1 to Figure 3 As shown, a filter screen 14 is fixedly arranged in the collector 10, and the filter screen 14 is immersed in the collection liquid. The filter screen 14 arranged in the collector 10 can perform preliminary filtering on the air dust to prevent some large plastic or non-plastic impurities from entering.
[0050] Specifically, the filter screen 14 is disposed in the upper circular tube of the collector 10, and the filter screen 14 uses a high-efficiency particle capture material to perform preliminary filtration on the dust in the incoming air.
[0051] Among them, regarding the connection structure between the collector 10 and the microplastic separator 30:
[0052] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 4 As shown, a protective cover 20 is provided on the outside of the microplastic separator 30, a collector 10 is fixedly arranged at the upper opening of the protective cover 20, and a drain pipe 11 is located inside the protective cover 20. The setting of the protective cover 20 can protect the microplastic separator 30 and reduce the influence of external interference falling into the microplastic separator 30 and affecting the content of microplastic particles on the filter membrane assembly.
[0053] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 4As shown, a long opening 21 is provided on the side wall of the protective cover 20, and the ends of the long opening 21 are flush with the corresponding ends of the protective cover 20; a part of the knob 13 of the valve 12 passes through the long opening 21 and is located outside the protective cover 20; a bottom drain pipe 34 is provided at the bottom of the microplastic separator 30, and the end opening of the bottom drain pipe 34 is a bottom drain port; the end of the bottom drain pipe 34 passes through the long opening 21 and is located outside the protective cover 20. The setting of the long opening 21 on the protective cover 20 can fix the collector 10 and the microplastic separator 30, limit their circumferential rotation, and ensure their stability; and the knob 13 of the valve 12 is located outside the protective cover 20, which can facilitate the operator to rotate and adjust.
[0054] Specifically, the protective cover 20 is cylindrical and has upper and lower openings, and ends of the long opening 21 are respectively connected to the upper opening and the lower opening of the protective cover 20 .
[0055] Specifically, the collector 10 and the microplastic separator 30 may be made of transparent material. In this case, the operator may observe the internal conditions of the collector 10 and the microplastic separator 30 through the opening of the protective cover 20 .
[0056] Among them, the relevant settings of the microplastic separator 30 are:
[0057] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 5 As shown, the filter membrane assembly includes a plurality of filter membranes 32, each filter membrane 32 is arranged in parallel, and the size of the filter hole of each filter membrane 32 gradually decreases from close to far away from the collector 10. By setting a plurality of filter membranes 32, and the filter holes of the filter membranes 32 gradually decrease from top to bottom, it is possible to grade and separate microplastic particles and reduce the subsequent grade and separation steps.
[0058] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 5 As shown, the microplastic separator 30 includes a plurality of upper cylinders 31 and a lower cylinder 33; filter plates are provided in the upper cylinders 31 and the lower cylinder 33, and a filter membrane 32 is placed on the filter plate; the lower end of the upper cylinder 31 can be plugged and fixed to the upper end of another upper cylinder 31 or to the upper end of the lower cylinder 33; the lower end of the lower cylinder 33 is connected and communicated with a drain pipe 11. The microplastic separator 30 is composed of a plurality of upper cylinders 31 and a lower cylinder 33, and has a simple structure, which is convenient for adding or removing filter membranes 32 according to different layers. It has a simple structure and is easy to install and use.
[0059] Among the optional solutions of this embodiment, it is more preferred that Figure 1As shown, a protrusion 311 is fixedly provided on the outer wall of each upper cylinder 31. The protrusion 311 of the upper cylinder 31 can be arranged to match the long opening 21 provided on the protective cover 20, so as to facilitate the circumferential rotation of the upper cylinder 31 and ensure its stability during use.
[0060] Specifically, the overall internal space formed by each upper cylinder 31 and the lower cylinder 33 is the accommodating cavity, the upper opening of the uppermost upper cylinder 31 is the top opening, and the terminal opening of the bottom drainage pipe 34 connected to the lower cylinder 33 is the bottom drainage port.
[0061] Wherein, a lifting frame 40 is also provided below the microplastic separator 30:
[0062] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 6 As shown, a lifting frame 40 is also provided at the bottom of the microplastic separator 30; the lifting frame 40 can synchronously adjust the height positions of the microplastic separator 30 and the collector 10. The setting of the lifting frame 40 can adjust the height of the collector 10 and the microplastic separator 30, so as to collect and study the microplastic particles in the air deposition at different height positions.
[0063] Among the optional solutions of this embodiment, it is more preferred that Figure 1 , Figure 4 and Figure 6 As shown, the lifting frame 40 includes a support frame 41, a fixed tube 42, a telescopic tube 43 and a fixed plate 44; the support frame 41 is fixedly arranged at the lower end of the fixed tube 42, and the support frame 41 includes a plurality of supporting legs; the lower end of the telescopic tube 43 is inserted into the fixed tube 42 through the upper end opening of the fixed tube 42, and the upper end of the telescopic tube 43 is fixedly connected to the fixed plate 44; the telescopic tube 43 and the fixed tube 42 are both provided with a plurality of perforations along the height direction, and a connecting pin 45 can be inserted into a perforation of the telescopic tube 43 and a perforation of the fixed tube 42; the microplastic separator 30 can be fixed on the fixed plate 44. The lifting frame 40 is composed of a support frame 41, a fixed tube 42, a telescopic tube 43 and a fixed plate 44, and has a simple structure, is convenient to adjust, and is stable and reliable as a whole.
[0064] Specifically, the connection setting of the telescopic tube 43 relative to the fixed tube 42 can also be that a through hole can be set on the fixed tube 42, and a connecting pin 45 is inserted in the through hole, a plurality of through holes are set on the telescopic tube 43, or a plurality of through holes are set on the fixed tube 42, and a through hole is set at the lower end of the telescopic tube, etc.; the through holes include two opposite first through holes.
[0065] Specifically, the lower end of the protective cover 20 is fixed on the fixing plate 44, such as by welding.
[0066] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 6 As shown, the end of each supporting leg is set as a tip or is provided with a suction cup 46. The end of the supporting leg can be set as a tip or a suction cup 46, so that it can be suitable for different sampling scenarios.
[0067] Among them, regarding other related settings:
[0068] Specifically, the main material of the device for collecting microplastics in air dust 100 of this embodiment is a material that does not produce secondary microplastics and is an environmentally friendly material, such as stainless steel, glass, activated carbon or other composite materials.
[0069] Specifically, the size, material and shape of each part of the air dust collection device 100 of this embodiment can be set according to actual conditions: for example, the collector 10 is made of glass, and its upper circular tube diameter is 60 cm, and the upper opening is vertically upward; the filter screen 14 is made of ceramic material, and its filter hole is 5.0 mm; the protective cover 20 is made of stainless steel, with a diameter of 50 cm, a height of 60 cm, and a width of the long opening 21 of 3 cm; the upper opening inner diameter of the upper cylinder 31 in the microplastic separator 30 is 45 cm, the lower cylinder 33 is conical, and the lower opening inner diameter is 30 cm, and the lower opening is connected and communicated with one end of the bottom drainage pipe 34.
[0070] Specifically, the sampling height can be set according to actual needs, such as adjusting the sampling height to 1.5m from the ground.
[0071] Specifically, the collection efficiency is improved by: ① By adjusting the angle and position of the collector 10 and optimizing the surrounding air flow, the collection efficiency of microplastics can be improved; ② Setting up multi-stage filtration to gradually reduce impurities in the air, improve the purity of microplastics, and reduce subsequent purification steps.
[0072] Specifically, relevant filtering devices such as the filter screen 14 and the filter membrane 32 on the microplastic separator 30 can improve their collection efficiency of microplastic particles by optimizing the pore size and surface properties of the material.
[0073] Among them, ① the material of the filter device: it should have high filtration efficiency and good durability; such as stainless steel fiber, polyester fiber and glass fiber; ② the aperture size of the filter holes on the filter device: the aperture size should be able to filter out non-plastic impurities while avoiding blockage; the aperture size is determined according to the size of the microplastics to ensure that the microplastic particles can be effectively collected.
[0074] The operation process and method of the device 100 for collecting microplastics in air dust in this embodiment mainly include the steps of device installation, startup, operation monitoring, microplastic collection and storage. The specific operation method is as follows:
[0075] 1. Install the device, install and fix the whole device at the sampling position, so that the upper opening of the collector 10 is vertically upward for sampling;
[0076] 2. Start: Close the valve 12 of the drain pipe 11, add the collection liquid to the collector 10, the liquid level submerges the filter 14, start the timer, and start sampling;
[0077] 3. Operation monitoring: according to the research purpose, set the sampling time (such as setting the sampling time to 72 hours (3 days)), observe the height of the collected liquid level during the period (such as once), and replenish the collected liquid appropriately; if it rains or snows, open the valve 12 of the drain pipe 11 to drain the collected liquid;
[0078] 4. Collection and storage of microplastics: After sampling, open the valve 12 of the discharge pipe 11, and the collected liquid passes through the microplastic separator 30, and is rinsed with distilled water (e.g., 6 times), so that the rinse water also passes through the microplastic separator 30, and the microplastics are retained on the filter membrane 32. The filter membrane 32 is collected to obtain a purified sample of microplastics in air dust for further analysis.
[0079] The sampling time was 72 hours, and the samples were washed and collected 6 times with distilled water to obtain the purified samples of microplastics in air dust. The results of the analysis of the purified samples of microplastics by Fourier transform microspectrophotometer are shown in the following table:
[0080]
[0081]
[0082] After six parallel samples of microplastic collection tests, the standard deviation of the results was less than 3%, which shows that the device 100 for collecting microplastics in air dustfall of this embodiment can accurately collect microplastic samples in air dustfall.
[0083] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of the present invention. At the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.
Claims
1. A device for collecting microplastics in air dust, characterized by: Includes collector and microplastic separator; The collector contains a collecting liquid in which the microplastic particles are insoluble; a drain pipe is provided at the bottom of the collector, and a valve that can be opened and closed is provided on the drain pipe; The microplastic separator has a top opening, a accommodating cavity and a bottom drain port; the top opening and the bottom drain port are both connected to the accommodating cavity; the end of the drain pipe is located above the top opening, and a filter membrane assembly for filtration is arranged in the accommodating cavity, and the filter membrane assembly can intercept microplastic particles.
2. The device for collecting microplastics in air dust according to claim 1, characterized in that: A filter screen is fixedly arranged in the collector, and the filter screen is immersed in the collection liquid.
3. The device for collecting microplastics in air dust according to claim 1, characterized in that: A lifting frame is also provided at the bottom of the microplastic separator; The lifting frame can synchronously adjust the height positions of the microplastic separator and the collector.
4. The device for collecting microplastics in air dust according to claim 1, characterized in that: A protective cover is provided on the outer side of the microplastic separator, the collector is fixedly arranged at the upper opening of the protective cover, and the drain pipe is located inside the protective cover.
5. The device for collecting microplastics in air dust according to claim 4, characterized in that: A long opening is provided on the side wall of the protective cover, and ends of the long opening are respectively flush with corresponding ends of the protective cover; A portion of the knob of the valve passes through the long opening and is located outside the protective cover; A bottom drainage pipe is provided at the bottom of the microplastic separator, and the end opening of the bottom drainage pipe is the bottom drainage port; The end of the bottom drain pipe passes through the long opening and is located outside the protective cover.
6. The device for collecting microplastics in air dust according to claim 1, characterized in that: The filter membrane assembly includes a plurality of filter membranes, each of which is arranged in parallel, and the size of the filter hole of each filter membrane gradually decreases in a direction from close to to far away from the collector.
7. The device for collecting microplastics in air dust according to claim 3, characterized in that: The lifting frame includes a support frame, a fixed tube, a telescopic tube and a fixed plate; The support frame is fixedly arranged at the lower end of the fixed pipe, and the support frame includes a plurality of supporting legs; The lower end of the telescopic tube is inserted into the fixed tube through the upper end opening of the fixed tube, and the upper end of the telescopic tube is fixedly connected to the fixed plate; The telescopic tube and the fixed tube are both provided with a plurality of through holes along the height direction, and a connecting pin can be inserted into one of the through holes of the telescopic tube and one of the through holes of the fixed tube; The micro plastic separator can be fixed on the fixing plate.
8. The device for collecting microplastics in air dust according to claim 7, characterized in that: The end of each supporting leg is configured as a pointed end or is provided with a suction cup.
9. The device for collecting microplastics in air dust according to claim 6, characterized in that: The microplastic separator comprises a plurality of upper cylinders and a lower cylinder; The upper cylinder and the lower cylinder are both provided with a filter plate, and a filter membrane is placed on the filter plate; The lower end of the upper cylinder can be plugged and fixed to the upper end of another upper cylinder or to the upper end of the lower cylinder; The lower end of the lower cylinder is connected and communicated with the liquid discharge pipe.
10. The device for collecting microplastics in air dust according to claim 9, characterized in that: A protrusion is fixedly arranged on the outer side wall of each upper cylinder.