Enrichment device for quickly and continuously separating micro-plastics and use method thereof

Abstract

The invention provides an enrichment device for quickly and continuously separating micro-plastics and a use method thereof. The device comprises a flotation liquid circulating part and a sample separating and enriching part, wherein the flotation liquid circulating part comprises a peristaltic pump, a liquid storing bottle, a flow meter, a suction filtration barrel, a vacuum pump and a guide pipe; the sample separating and enriching part comprises an ultrasonic generating device, a sample bottle, a flotation pipe, a stirring rod and multiple stages of sieving disks; the suction filtration barrel is placed in the ultrasonic generating device; the sample bottle is placed in the suction filtration barrel, the flotation pipe is assembled on the sample bottle, and finally, a plurality of sieving disks are nested outside the flotation pipe; the stirring rod is extended into the sample bottle; the suction filtration barrel is connected with the vacuum pump; and filter screens or filter membranes with different particle sizes are placed in the sieving disks. The device provided by the invention is designed based on the principle of density separation and has the following characteristics:the flotation liquid is circularly used among the three parts, so that the economic cost is lowered, and secondary pollution is avoided; and by the arrangement of the multiple stages of sieving disks, micro-plastic particles with different particle sizes can be continuously subdivided, so that the separation efficiency is high.

Description

technical field [0001] The invention relates to an extraction device for rapidly separating microplastics, in particular to an enrichment device for rapidly and continuously separating microplastics and a method for using the same. Background technique [0002] Compared with materials such as wood and metal, plastic products are low in cost and have advantages such as greater weight strength, lower thermal conductivity, durability and biological inertness. They are used in various fields, for example, from household products to personal Hygienic products, from the packaging industry to construction materials and so on. While enjoying the great convenience brought by plastic products, the problem of garbage pollution from a large number of plastic products also plagues people. A large amount of plastic waste is discharged into the aquatic environment, especially in the ocean. Large pieces of plastic products are gradually decomposed into small particles of plastic through p...

AI Technical Summary

Problems solved by technology

For example: Chinese patent (patent No.: CN 108177273A) continuous separation and enrichment device for microplastics uses gas medium and density liquid to mix as a flotation agent carrying microplastics to achieve the purpose of separating microplastics, but it cannot Microplastics of different particle sizes are sieved, and microplastics wrapped in sludge cannot be effectively extracted and enriched

In addition, the Chinese patent (patent number: CN 108202428 A) is a microplastic extraction device based on electrostatic technology. Although it can effectively extract microplastics in sediments, it cannot effectively extract small particles of microplastics. Plastics and microplastics wrapped in sediment and pollutants, not to mention the inability to separate microplastics of different particle sizes

Although most of the microplastic separation and extraction devices can realize the automatic and continuous separation of microplastics from the sediment, in the actual experiment process, it often happens that the microplastics are not easy to fall off when they are attached to the surface of the vessel and the wrapped microplastics are not easy to be removed. Extracted, so that the final separation and extraction of microplastics results are very different from the actual

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