Identification and separation device and method for waste plastics

Abstract

The invention provides an identification and separation device for waste plastics. The device comprises a crushing plant, a friction assembly, an accelerating unit, a constant magnetic field unit, a comparing unit, and a collecting unit. A variety of standard pure plastics or waste plastics are crushed by the crushing plant and then are charged by the friction assembly, the charged plastics enter into the accelerating unit for acceleration and then enter into a constant magnetic field at a same speed with an included angle formed by the track of the plastics and the direction of the magnetic field being greater than zero, thereby forming different movement tracks, the comparing unit compares the movement tracks of waste plastic particles with the movement tracks of a variety of standard pure plastic particles so as to determine that a waste plastic and a standard pure plastic which has a same movement track as the waste plastic does are of a same kind, and the collecting unit collects waste plastic particles which have similar movement tracks in the magnetic field. The invention also provides an identification and separation method for waste plastics. According to the invention, the disadvantages that an optical method for identification of waste plastics is work-environment-demanding and expensive can be overcome, and the purposes of easy operation and low cost in identification and separation of waste plastics of automobiles are achieved.

Description

technical field [0001] The invention belongs to the technical field of waste automobile plastic recycling and recycling, and in particular relates to a waste plastic identification and separation device and method. Background technique [0002] In the process of automobile lightweighting, plastics have been widely used in automobiles, such as body, structural parts, interior and exterior decoration, etc. Due to the different performance requirements of various auto parts, there are many types of plastics used, mainly including PA, PMMA, PC, ABS, PP, PE, etc. However, with the increase in car ownership, the amount of scrapped cars is also increasing, and the recycling of automotive plastics has become the focus of social attention. There are several difficulties in the recycling and reuse of automotive plastics: (1) Many large plastic automotive assemblies (such as the body) are not made of a single type of plastic, but a combination of two or more functional plastics. It is...

AI Technical Summary

Problems solved by technology

However, for automotive products before the introduction of the above regulatory requirements, there may be no plastic logo, and other methods are required to identify

According to the polarity difference of plastics, the current advanced separation technologies mainly include mid-infrared spectroscopy, near-infrared spectroscopy, Raman spectroscopy, X-ray fluorescence and other methods, but these methods are easily disturbed by external conditions (such as plastic aging, sediment, etc.) , The working environment is demanding and the price is expensive

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