Complete equipment for separating plastic fragments of different density automatically and separating method thereof

Abstract

The invention discloses complete equipment for separating plastic fragments of different density automatically and a separating method thereof, wherein the complete equipment comprises multiple sets of flotation equipment, each set of flotation equipment comprises a flotation cell as well as a floating material dehydrator for floating material dehydration and a sunk material dehydrator for sunk material dehydration which are respectively arranged at the tail ends of the flotation cell, a material discharge device for conveying the sunk material to the sunk material dehydrator is connected at the bottom of the tail end of the flotation cell, the multiple sets of flotation equipment are parallel so as to form multistage flotation equipment, wherein the discharge port of the sunk material dehydrator of the upper stage of flotation equipment is opposite to the water inlet end of the flotation cell of the next stage of flotation equipment, and the density of a fluid medium in the flotation cells of all stage of flotation equipment is increased gradually. The complete equipment can be used for separating the plastic fragments of different density in the waste plastic fragments automatically, thus being high in degree of automation and greatly improving the production efficiency.

Description

technical field [0001] The invention relates to a device in the field of waste plastic recycling, in particular to a complete set of equipment and a separation method for automatically separating plastic fragments of different densities. Background technique [0002] In the field of waste plastic recycling, different types of plastics often have different densities; if they are not distinguished, it will affect the recycling of waste plastics, and even cannot be reused. In the prior art, the sorting of plastics of different densities is usually realized by means of flotation. The basic principle of flotation is: plastic fragments are placed in a fluid medium of a certain density, and plastic fragments with a density smaller than that of the fluid medium float on the surface of the fluid medium; Plastic debris on the surface and bottom of the media can be separated. In actual production, the plastics to be recycled usually contain a variety of plastics with different densit...

AI Technical Summary

Problems solved by technology

Although this method can realize the separation of plastic fragments of different densities, the degree of automation is low and the production efficiency is not high; and the fluid medium in this stage of the process is attached to the plastic fragments discharged from the previous process, which will affect the flow rate when they are put into the next process. The density of the fluid medium in the next process affects the flotation effect

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