Anti-blocking synchronous collection system for multi-particle-size micro-plastic in water body

Abstract

The invention discloses an anti-blocking synchronous collection system for multi-particle-size micro-plastic in a water body. The system comprises a water inlet pipe, a multi-stage screen combinationdevice connected with the water inlet pipe and provided with at least two stages of screens with different pore diameters, a receiving barrel connected with a water outlet of the multi-stage screen combination device, and a rotary water inlet assembly arranged at the joint of the water inlet pipe and the multi-stage screen combination device. In the present invention, a large-sample water body enters from the water inlet pipe and enters the multi-stage screen combination device through the rotary water inlet assembly, the rotary water inlet assembly ensures that inlet water uniformly flushes the screen surface of the top layer, small-particle-size micro-plastic is prevented from being retained on the top large-aperture screen surface, the accuracy of a later detection result is improved, and micro-plastic particles with different particle sizes are intercepted on the screen layers with the corresponding apertures, so that synchronous particle size grading and collection of the micro-plastic in the large-sample water body are realized, and the accuracy of pollution detection of the micro-plastic in the water body is improved.

Description

technical field [0001] The invention relates to a collection system for microplastics in water bodies, which belongs to the field of water environment detection, and in particular to an anti-clogging synchronous collection system for multi-particle diameter microplastics in water bodies. Background technique [0002] As a new type of pollutant in water bodies, microplastics are usually described as plastic polymer particles with a particle size of less than 5 mm. Because of its ubiquity in water bodies, its own ecotoxicity, and its stable chemical properties that can persist in water bodies for hundreds of years, it is imperative to conduct comprehensive research on water pollution and ecological risks of microplastics. At present, there have been many studies on the occurrence and migration of microplastics in oceans, freshwater environments, and sewage plants, and there are also a few studies on the occurrence of microplastics in water supply plants, tap water, and bottled...

AI Technical Summary

Problems solved by technology

[0003] At present, the sampling methods of microplastic samples in water bodies are generally divided into three types: one is the collection of small sample containers. Due to the uneven spatial distribution of microplastics in water bodies, too low water sample volume will increase the error, that is, large sample water bodies The detection is more conducive to the accuracy of the detection, especially when the detection object is a water body with a low content of microplastics; the second is the collection of trawl nets. It is easy to leak small particles and the small pore mesh is easy to be blocked by other impurities in the water body, which is not conducive to scientific evaluation of the degree of microplastic pollution in the water body; the third is the enrichment of the filter, and the water sample is pumped through the pump or poured directly into the container The method introduces a closed one-stage or multi-stage filter screen with different pore sizes, which can realize the particle size classification of the collected microplastics while detecting large samples of water, but the enrichment work is often stopped due to clogging, and the airtightness of the filter screen Shells complicate collection cleanup

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