Experimental device for simulating aerosol micro-plastic environment

Abstract

The utility model belongs to the technical field of experimental devices, and particularly relates to an experimental device for simulating an aerosol micro-plastic environment, which comprises a fan, a transition section, a filter screen and an air duct, and the air duct is a closed loop consisting of an auxiliary air duct, an experimental air duct, a right half-ring-shaped air duct and a left half-ring-shaped air duct. The right half-ring-shaped air duct is communicated with the micro-plastic generator through an air pipe, and the micro-plastic generator inputs aerosol micro-plastic into the air duct through the air pipe; an air outlet is formed in the left semi-annular air duct, an air exhaust pipe is connected to the air outlet, an adsorption filter is arranged between the air exhaust pipe and the air outlet, and a plurality of layers of filter screens for adsorbing aerosol micro-plastics are arranged in the adsorption filter. On the basis of an existing device, the micro-plastic generator is connected to the air duct, the real environment of aerosol micro-plastic can be simulated in the air duct through the micro-plastic generator, the structure is simple, and operation is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of experimental device technology, specifically relating to an experimental device for simulating an aerosol microplastic environment. Background Technology

[0002] Microplastics are plastic particles with a diameter of less than 5 millimeters, widely found in water, soil, and the atmosphere. Due to their small size and easy migration, microplastics have become a significant carrier of environmental pollution, capable of adsorbing toxic substances and accumulating through the food chain, posing a potential threat to ecosystems and human health. In recent years, with the increasing severity of microplastic pollution, research on its migration, diffusion mechanisms, and ecological impacts in the environment has become a global focus. However, current research on the diffusion behavior of microplastics in the atmosphere remains relatively weak, mainly due to the lack of experimental facilities capable of accurately simulating real-world environmental conditions.

[0003] Existing microplastic research primarily focuses on aquatic environments, such as simulating the migration of microplastics in rivers or oceans through fluid experiments. In contrast, simulation techniques for atmospheric microplastic aerosols are still in the exploratory stage. Traditional aerosol experimental devices are mostly used for studying particulate matter such as dust and smoke. However, because microplastics differ significantly from dust particles in density, shape, and surface properties, directly applying existing equipment makes it difficult to accurately simulate their suspension, diffusion, and sedimentation behavior. Furthermore, existing devices generally suffer from uneven microplastic distribution, inaccurate concentration control, and the risk of leakage and environmental pollution, making it difficult to meet the requirements for long-term stable experiments. Utility Model Content

[0004] The purpose of this invention is to provide an experimental device for simulating an aerosol microplastic environment, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An experimental apparatus for simulating an aerosol microplastic environment includes a fan, a transition section, a filter screen, and an air duct. The air duct is a closed loop consisting of an auxiliary air duct, an experimental air duct, a right semi-annular air duct, and a left semi-annular air duct. The right semi-annular air duct is connected to a microplastic generator via a duct, and the microplastic generator inputs aerosol microplastics into the air duct through the duct. An exhaust port is provided on the left semi-annular air duct, and an exhaust pipe is connected to the exhaust port. An adsorption filter is provided between the exhaust pipe and the exhaust port, and the adsorption filter contains multiple layers of filter screens for adsorbing aerosol microplastics.

[0007] The microplastic generator includes a housing, inside which is an ultrasonic atomizer and an atomization chamber. The outlet end of the atomization chamber is connected to an air duct extending into the housing.

[0008] The atomizing chamber is also connected to a connecting pipe, the other end of which is connected to the air outlet of the auxiliary fan.

[0009] One-way valves are installed on both the connecting pipe and the air duct.

[0010] The auxiliary fan is electrically connected to a frequency converter for adjusting the motor speed on its power supply line.

[0011] All the filters mentioned in the multi-layer filter are HEPA filters, and the filtration accuracy of the multi-layer filter increases sequentially along the airflow direction.

[0012] The auxiliary air duct is equipped with a spiral air guide plate, the radial width of which is adapted to the inner diameter of the auxiliary air duct.

[0013] The experimental air duct is equipped with a glass observation window on its wall, and a concentration detector is installed on the observation plane of the glass observation window.

[0014] The concentration detector is a laser scattering concentration detector.

[0015] The exhaust volume of the exhaust vent is kept in balance with the intake volume of the fan.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0017] 1) By connecting a microplastic generator to the air duct based on the existing device, the microplastic generator can simulate the real environment of aerosol microplastics in the air duct. The structure is simple and the operation is convenient.

[0018] 2) By installing an adsorption filter composed of multiple HEPA filters at the air outlet, microplastics can be effectively controlled within the experimental device, preventing aerosol microplastics from leaking into the air, which is safe and environmentally friendly.

[0019] 3) By installing a laser scattering concentration detector in the experimental air duct section, the concentration of microplastics in the air duct can be detected in real time, ensuring the real effect of simulating the aerosol microplastic environment. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0021] Attached Figures and Their Names: 1. Fan, 2. Transition Section, 3. Filter Screen, 4. Auxiliary Air Duct, 5. Air Duct, 6. Connecting Pipe, 7. Frequency Converter, 8. Auxiliary Fan, 9. Microplastic Generator, 10. Glass Observation Window, 11. Experimental Air Duct, 12. Exhaust Outlet, 13. Right Half-Annular Air Duct, 14. Left Half-Annular Air Duct, 15. Spiral Air Induction Plate, 16. Ultrasonic Nebulizer, 17. Concentration Detector, 18. Exhaust Pipe, 19. Adsorption Filter. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] To better understand this utility model, the following explanation is provided: This utility model is a further application and development based on the core technology of our company's independently developed "Experimental Device for Simulating Real Sandstorm Environment" (Chinese Utility Model Patent, Application No. 2014101878719).

[0025] like Figure 1 As shown, the experimental device for simulating an aerosol microplastic environment according to the present invention includes a fan 1, a transition section 2, a filter screen 3, and an air duct. The air duct is a closed loop composed of an auxiliary air duct 4, an experimental air duct 11, a right semi-annular air duct 13, and a left semi-annular air duct 14. The left semi-annular air duct 14 is provided with a transition section 2 connected to the fan, and the transition section 2 is provided with a filter screen 3.

[0026] The right semi-annular air duct 13 is connected to the microplastic generator 9 via the air duct 5. The microplastic generator 9 includes a housing, which is a sealed housing with a sealing cover. The sealing cover has a through hole for the air duct 5 to be inserted and installed, and a sealing gasket is installed on the through hole. An ultrasonic atomizer 16 and an atomization chamber are installed inside the housing. The ultrasonic atomizer 16 is used to atomize the liquid containing microplastics, so that it forms aerosol microplastics in the atomization chamber. The outlet end of the atomization chamber is connected to the air duct 5 that extends into the housing. A connecting pipe 6 is also connected to the atomization chamber. The other end of the connecting pipe 6 is connected to the air outlet of the auxiliary fan 8. The auxiliary fan 8 can evenly blow the aerosol microplastics into the air duct. A frequency converter 7 is electrically connected to the power line of the auxiliary fan 8. The frequency converter 7 is used to control the motor speed of the auxiliary fan 8 to adjust the amount of aerosol microplastics input in the air duct. Both the connecting pipe 6 and the air duct 5 are equipped with one-way valves, which are used to prevent backflow of aerosol microplastics.

[0027] An exhaust port 12 is installed on the left semi-annular air duct 14, and a valve is installed on the exhaust port 12. The motor of the fan 1 is also electrically connected to a frequency converter, which can be used to adjust the wind speed of the fan 1. Combined with the valve on the exhaust port 12, this ensures that the exhaust volume of the exhaust port 12 is balanced with the intake volume of the fan 1, thereby maintaining stable pressure within the air duct experimental chamber and reducing pressure fluctuations. An exhaust pipe 18 is connected to the exhaust port 12, and an adsorption filter 19 is installed between the exhaust pipe 18 and the exhaust port 12. The adsorption filter 19 contains multiple layers of HEPA filters for adsorbing aerosol microplastics. The HEPA filter models are H10, H11, H12, H13, and H14, with the filtration precision increasing sequentially along the airflow direction. The adsorption filter 19 effectively controls aerosol microplastics within the experimental device, preventing leakage into the air, thus ensuring safety and environmental protection. The recycling method for aerosol microplastics is natural filtration. To ensure their efficient reuse, the microplastics are thoroughly cleaned and collected after each experimental stage, thereby achieving the recycling and reuse of microplastics and effectively reducing the purchase cost of microplastics.

[0028] Two sets of mounting bases are symmetrically welded along the axial direction on the inner peripheral wall of the auxiliary air duct 4. A spiral air guide plate 15 is installed between the two sets of mounting bases. The radial width of the spiral air guide plate 15 is adapted to the inner diameter of the auxiliary air duct 4. The spiral air guide plate 15 can slow down the settling speed of microplastics and make them stay in the air for a longer time.

[0029] The experimental air duct 11 has a glass observation window 10 on its wall, and a concentration detector 17, which is a laser scattering type, is installed on the observation plane of the glass observation window 10. By using the concentration detector 17, the concentration of aerosol microplastics within the experimental air duct 11 can be detected in real time, thus achieving a realistic simulation of an aerosol microplastic environment. Experiments have shown that mice placed in the experimental chamber of this application can live normally in an aerosol microplastic environment.

Claims

1. An experimental device for simulating an aerosol microplastic environment, characterized in that: The device comprises a fan (1), a transition section (2), a filter screen (3) and an air duct, which is a closed loop composed of an auxiliary air duct (4), an experimental air duct (11), a right half-ring air duct (13) and a left half-ring air duct (14), characterized in that the right half-ring air duct (13) is connected to a microplastic generator (9) through an air pipe (5), the microplastic generator (9) inputs aerosol microplastics into the air duct through the air pipe (5); the left half-ring air duct (14) is provided with an air outlet (12), the air outlet (12) is connected to an air exhaust pipe (18), an adsorption filter (19) is arranged between the air exhaust pipe (18) and the air outlet (12), and the adsorption filter (19) is provided with multiple layers of filter screens for adsorbing aerosol microplastics.

2. The experimental device for simulating the aerosol microplastic environment according to claim 1, characterized in that: The microplastic generator (9) comprises a shell, an ultrasonic atomizer (16) and an atomization chamber arranged in the shell, and the outlet end of the atomization chamber is connected to the air pipe (5) extending into the shell.

3. The experimental device for simulating the aerosol microplastic environment according to claim 2, characterized in that: The atomization chamber is further connected to a connecting pipe (6), and the other end of the connecting pipe (6) is connected to the air outlet of an auxiliary fan (8).

4. The experimental device for simulating the aerosol microplastic environment according to claim 3, characterized in that: The connecting pipe (6) and the air pipe (5) are both provided with a one-way valve.

5. The experimental device for simulating the aerosol microplastic environment according to claim 3, characterized in that: A frequency converter (7) for adjusting the rotating speed of the motor is electrically connected to the power line of the auxiliary fan (8).

6. The experimental device for simulating the aerosol microplastic environment according to claim 1, wherein: The multiple layers of filter screens are all HEPA filter screens, and the filtering accuracy of the multiple layers of filter screens increases in turn along the airflow direction.

7. The experimental device for simulating the aerosol microplastic environment according to claim 1, wherein: The auxiliary air duct (4) is provided with a spiral air guide plate (15), and the radial width of the spiral air guide plate (15) is adapted to the inner diameter of the auxiliary air duct (4).

8. The experimental device for simulating the aerosol microplastic environment according to claim 1, characterized in that: The pipe wall of the experimental air duct (11) is provided with a glass observation window (10), and a concentration detector (17) is installed on the observation plane of the glass observation window (10).

9. The experimental device for simulating the aerosol microplastic environment according to claim 8, characterized in that: The concentration detector (17) is a laser scattering type concentration detector.

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