Production device and process for recycling, granulating and reusing high-quality bottle flakes

Abstract

The invention relates to the technical field of bottle flake recycling, granulating and reusing, in particular to a production device and process for recycling, granulating and reusing high-quality bottle flakes. The production device takes the 3A-grade bottle flakes as a raw material and is sequentially provided with a bottle flake feeding device, an impurity removing and drying device, a screw extruding and pelletizing device and a multi-bin mixing device, wherein the screw extruding and pelletizing device is communicated with the multi-bin mixing device through material pipelines respectively. The process mainly comprises the following steps of: screening and sorting the bottle flakes to remove impurities; then conducting preheating, heating and drying, and melting and pelletizing; andfinally outputting pellets after uniform mixing. The device and the process have the characteristic of high refinement degree, the defects of high cost, low quality and low yield of an existing production system are avoided, the batch yield is greatly improved through the process for recycling and granulating the bottle flakes, and downstream use is facilitated; and the pellets produced through the device and the process can be used for producing downstream high-end products and even can be used for making food-grade products.

Description

technical field [0001] The invention relates to the technical field of recycling, granulating and reusing bottle flakes, in particular to a production device and process for recycling, granulating and reusing high-quality bottle flakes. Background technique [0002] The existing bottle flake recycling and granulation process varies from manufacturer to manufacturer. The existing process equipment is to process the recycled bottle flakes through primary selection, crushing, cleaning, drying or drying, and then directly enter the screw extruder for melting and granulation. In the above technology, the bottle flakes directly entering the screw extruder are generally 3A standard bottle flakes (that is, bottle flakes formed after primary selection, crushing, cleaning and drying of PET beverage bottles recovered from towns, and then It is called 3A bottle flakes), the polyvinyl chloride content in the bottle flakes is about 90-100mg / Kg, the polyolefin content is about 180-200mg / Kg...

AI Technical Summary

Problems solved by technology

There are still relatively high residues in the bottle flakes, which affect the downstream granulation and the performance indicators of products in various stages. In addition, the process equipment does not have high requirements for the quality of granulation, and most of the products produced by the process can only be used to manufacture low-end pellets. end product

[0003] In addition, the existing batch production of bottle flake recycling and granulation process is not large, generally ranging from a few tons to 40 tons per batch. Since recycled bottle flakes are used as raw materials, the quality of raw materials is uneven, and the production of small batches will be difficult. As a result, the quality of products produced in different periods is unstable, and the length of molecular chains is uneven, and it cannot provide materials with stable quality and batches for downstream customers, which has caused great inconvenience to the stable use of downstream customers;

[0004] In general, the existing process equipment mainly has the following problems. First, the performance indicators of the obtained bottle flakes and pellets are low, and the quality of the obtained products is not high; Stable supply; thirdly, because recycled bottle flakes are used as raw materials, the quality of raw materials is uneven, and the parameters of pelletizing obtained by different batches will be different. Due to this difference, the performance indicators of downstream products will be unstable. , discontinuous, inconsistent, or even substandard

For example, when it is supplied to the downstream production of filaments, there will be wool and broken filaments. When dyeing, it will lead to difficult dyeing and uneven dyeing, etc.

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