A device and method for dynamic separation of plastic waste based on magnetism-Archimedes
A separation device and waste technology, applied in the field of plastic waste dynamic separation device, achieves the effect of overcoming cumbersome operation, obvious effect and simple operation
Active Publication Date: 2020-05-08
ZHEJIANG UNIV
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Problems solved by technology
The hydrocyclone method can only separate two substances with different densities at the same time
Method used
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Embodiment 1
[0062] Magnet 1 is a square magnet with a length of 50mm*width of 50mm*height of 25mm and a magnetic induction intensity of 0.425T on the center surface.
[0063] The medium solution that needs to be configured is 2.5mol / L MnCl 2 solution with a density of 1.244 g / cm 3 Around, the magnetic susceptibility is 4.65×10 -4 . The sample to be separated is PTFE (polytetrafluoroethylene, with a density of 2.17g / cm 3 ), PVC (polyvinyl chloride, density 1.33g / cm 3 ), PLA (polylactic acid, density 1.255g / cm 3 ), PP (polypropylene, density 0.895-0.92g / cm 3 ), PMMA (polymethyl methacrylate, density 1.18g / cm 3 ), TPEE (thermoplastic polyester elastomer, density 1.22g / cm 3 ). Put the sample to be separated into the device, and under the action of the magnetic field, the sample is finally separated. Finally, the six separated materials were taken out separately.
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Abstract
The invention discloses a plastic waste dynamic separating unit based on magnet-Archimedes. The plastic waste dynamic separating unit is characterized in that a separating pool, a magnet putting device, a magnet and a sample putting way are included; the magnet putting device is connected to the outer side of one side wall of the separating pool and is provided with a magnet putting cavity, and the bottom of the magnet putting cavity and the bottom of the separating pool are located in one plane; the magnet is placed into the magnet putting cavity, and the height of the magnet is the same as the height of an inner cavity of the separating pool; the sample putting way is in a cuboid shape and is attached to the inner side of one side wall, close to the magnet putting device, of the separating pool, and a sample outlet is formed in the side wall of the sample putting way; and the plastic waste dynamic separating unit is used for separating plastic waste with the diameter within the scope(4 mm, the distance between falling points of the adjacent plastic waste). The invention further discloses a plastic waste dynamic separating method using the unit.
Description
technical field [0001] The invention relates to a plastic waste separation device, in particular to a magnetic-Archimedes-based dynamic plastic waste separation device and method. Background technique [0002] Plastic products have the advantages of easy manufacture, light weight, heat insulation, and corrosion resistance. They are widely used in daily life and industrial production, and a lot of plastic waste is generated. my country has the highest proportion of plastic production in the world, at 29%, while the recycling rate is only about 9%, far lower than Europe's 45%. If these plastic wastes cannot be dealt with reasonably and effectively, it will pose a threat to the natural environment and food safety. The high cost of separation and the poor effect of separation methods are a major obstacle to the recycling of plastic waste. [0003] In industry, relatively mature plastic separation methods mainly include photoelectric separation, winnowing and electrostatic sepa...
Claims
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IPC IPC(8): B29B17/02
CPCB29B17/02B29B2017/0203B29B2017/0244Y02W30/62
Inventor 赵朋张雪纯顾复张承谦颉俊冯统帅傅建中
Owner ZHEJIANG UNIV