Micro-plastic extraction device based on electrostatic technology

A technology of microplastics and technology, which is applied in the field of microplastics extraction devices based on electrostatic technology, to achieve the effect of reducing workload, low cost and simple principle

Inactive Publication Date: 2018-06-26
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Microplastics are becoming a hot spot in marine environment research. At present, there is no systematic and standardized method for the extraction and separation of microplastics. The existin

Method used

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  • Micro-plastic extraction device based on electrostatic technology
  • Micro-plastic extraction device based on electrostatic technology

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1:

[0034] Cut 10g of plastic film into small pieces of 5mm, mix with 2000g of sand to form a mixture, and then lower the mixture into the device for separation. Run under the best process parameters, the input voltage is 5.5kV, the roller speed is 150rpm, after the run, the materials in the three hoppers 6 are analyzed. The sand content of the plastic fragments in the left hopper 6 is 1.44%, the sand in the right hopper 6 does not contain microplastic fragments, the middle hopper 6 is mainly sand, and the ratio of plastic fragments is 12%. The material in the intermediate hopper 6 is separated again, the ratio of plastic fragments is reduced to 3%, and the separation effect is good.

Example Embodiment

[0035] Example 2:

[0036] Mix 1g of polyethylene, polyvinyl chloride and polypropylene fragments with a size of less than 5mm with 2000g of fine sand, add the mixture from the feeder 2 to the device for separation, and run under the above optimal process conditions. The mixture of the intermediate hopper 6 The material is reprocessed three times. Finally, the sand content in the left hopper 6 is 1.02%. The final proportion of the plastic fragments of the mixed material in the middle is 2.24%, and there is no plastic fragments in the right hopper 6, and the separation effect is good.

Example Embodiment

[0037] Example 3:

[0038] 2000 g of environmental sediment samples were added to the device for separation, the parameters of the high-voltage composite electrode 3 and the roller electrode 4 were adjusted to achieve the optimization process, and the mixed material in the intermediate hopper 6 was separated multiple times. Finally, 0.13 g of plastic fragments are separated, and the proportion of plastic fragments in the intermediate material is 3.1%.

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Abstract

The invention relates to a micro-plastic extraction device based on the electrostatic technology. The micro-plastic extraction device based on the electrostatic technology comprises a machine box, a feeding device, a high-voltage composite electrode, a roller electrode and hoppers, wherein the feeding device, the high-voltage composite electrode, the roller electrode and the hoppers are arranged in the machine box. One end of the feeding device is connected with the box wall of the machine box. The other end of the feeding device is located above the roller electrode. The high-voltage composite electrode is arranged above the right side of the roller electrode. An electrostatic field is formed between the high-voltage composite electrode and the roller electrode, so that air is ionized, and a great number of electrons are generated. The hoppers are located below the roller electrode. According to the micro-plastic extraction device based on the electrostatic technology, effective separation and extraction are conducted on micro-plastics in silt through the corona electrostatic technology, the workload of manual extraction and separation is greatly lightened, and the separation efficiency is improved. The micro-plastic extraction device based on the electrostatic technology can be widely applied to the technical field of environment monitoring and the technical field of separating micro-plastics from water body sediments.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring and separation of microplastics in water body sediments, in particular to a microplastic extraction device based on electrostatic technology. Background technique [0002] Since the invention of plastic materials, due to its good performance, it has been widely used by people. However, discarded plastic products will accumulate in the environment for a long time, and will be broken into small plastic fragments by physical and chemical effects, and can be transported over long distances. The marine environment is broken into smaller fragments by physical effects such as solar radiation, biological erosion, tidal and wave erosion. At present, people define these plastic material fibers, particles and fragments with sizes ranging from 1nm to 5mm as microplastics. Microplastics are widely distributed in the marine environment and are more likely to adsorb organic pollutants and heav...

Claims

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Application Information

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IPC IPC(8): B29B17/02B03C7/06
CPCB03C7/06B29B17/02Y02W30/52Y02W30/62
Inventor 郭宝元焦萌王会利查金苗
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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