Waste plastic kind sorting device and sorting method thereof

Abstract

The invention relates to a waste plastic kind sorting device and a sorting method thereof. The waste plastic kind sorting device comprises a conveyor mechanism, a near infrared ray scanning light source arranged above the front edge of the conveyor mechanism, a NIR photoelectric detector located at the front end of the near infrared ray scanning light source, a control mechanism connected with thenear infrared ray scanning light source and the NIR photoelectric detector and a high-pressure air injection mechanism arranged below the front end of the conveyor mechanism; the high-pressure air injection mechanism is connected with the control mechanism, and a classification partition board is arranged at the front end of the high-pressure air injection mechanism. According to the waste plastic kind sorting device and the sorting method thereof, through difference of spectra generated when the near infrared ray scanning light source radiates on different kinds of plastics, the waste plastics with the different kinds are sorted, the efficiency of classifying the waste plastics is greatly improved, the resource reuse rate of municipal solid waste is improved, through more accurate classification, values of products are improved, meanwhile, the environment is protected better, and the practicability is high.

Description

technical field [0001] The invention relates to the technical field of sorting waste plastics, and more specifically refers to a sorting device and a sorting method for waste plastics. Background technique [0002] Discarded plastics are an important part of domestic waste. Referring to relevant literature, the proportion of discarded plastics in domestic waste in my country is about 7%-12%. Waste plastics entering landfills not only take up storage capacity and waste land resources, but also have a very long degradation cycle, which is very harmful to the soil. Waste plastics are also the main cause of dioxins in waste incineration. [0003] The existing sorting technologies for waste plastic mixtures can be divided into dry and wet methods. The principle of wet separation is to configure suitable flotation media according to the density difference of different types of plastics; the disadvantage of wet separation is that it pollutes the environment greatly, and the dryin...

AI Technical Summary

Problems solved by technology

The principle of wet separation is to configure the appropriate flotation medium according to the density difference of different types of plastics; the disadvantage of wet separation is that the environment is polluted, and the drying of plastics after they are wetted requires water consumption and energy consumption.

The traditional dry separation technology mainly includes air separation and electrostatic separation; the classification accuracy of air separation is poor; the applicable objects of electrostatic separation are limited

Images