PET Bottle To Bottle Stage Washing Line

PET Bottle To Bottle Stage Washing Line

Overview
Boxin Machinery’s PET Bottle To Bottle Washing Line is an advanced solution designed to recycle post-consumer PET bottles into high-quality, FDA-approved rPET chips. As PET plastics constitute more than 40% of plastic packaging, the demand for high-end PET flakes has been steadily growing. This washing line addresses the critical issue of sustainable PET resource recovery, ensuring the production of clean and safe recycled PET material for use in food-grade applications. The line efficiently transforms waste PET bottles into reusable material through mechanical recycling, promoting environmental sustainability in the recycling industry.

Key Features

High-Quality Output:

The production line produces food-grade rPET chips, meeting the stringent quality standards set by the FDA.

rPET chips produced are safe for use in food packaging applications, contributing to the circular economy.

Advanced Automation:

The washing line features a high degree of automation, which reduces the risk of human error and ensures uniformity and high efficiency in the recycling process.

The system is designed to handle large volumes of PET bottles with minimal manual intervention.

Customizable Design:

The system can be tailored to handle different levels of impurities and materials present in PET bottles. This customization allows the system to be adaptable to a wide range of recycling conditions.

Factors like colored bottles, different types of labels, and non-PET materials can be adjusted to maximize efficiency in cleaning and separating contaminants.

Sustainability Commitment:

The entire production line aligns with global sustainability goals by reducing plastic waste and enhancing the recyclability of PET materials.

The production of high-quality food-grade rPET supports the reuse of plastic, helping industries reduce their reliance on virgin plastic production.

Applications

PET Bottle Recycling:

The primary application of this line is the recycling of post-consumer PET bottles. The line transforms these bottles into rPET chips suitable for food packaging.

Sustainable Packaging:

The recycled rPET chips can be used to make food containers and bottles, reducing the need for new plastic production and supporting sustainable packaging solutions.

Closed-Loop Recycling:

The line supports the concept of bottle-to-bottle recycling, ensuring that PET materials can be reused in the same application, reducing waste and promoting a circular economy.

Production Process
The PET bottle washing line follows a series of steps to ensure the efficient and thorough recycling of PET bottles into food-grade rPET chips. Below is a detailed breakdown of the key stages in the process:

Metal Chain Belt Conveyor

The PET bottles are first conveyed through a metal chain belt that removes any external packaging. The system features a motor power of 7.5 kW, and the conveyor is designed to effectively transport bottles for further processing.

Key Specifications:

Conveyor Width: 1500mm

Conveyor Length: 13000mm

Speed: 0-10 m/min

Debaler Machine

The debaler machine is used to break open the bales of PET bottles. This machine operates with a motor power of 11kW + 11kW and effectively separates compressed bottles for the next processing step.

Key Specifications:

Rotating Diameter: φ500 mm

Rotating Length: 1500 mm

Speed: 20 rpm

Roller Trommel

The roller trommel is a key step in the process, where it separates different impurities, such as mud, sand, stones, metal, and glass, based on size.

Key Specifications:

Motor Power: 4kW + 4kW

Hole Diameter: 12-50 mm

Drum Length: 6000 mm

Material: Stainless Steel 304

Wet Label Debaler Machine

This machine is designed to remove labels from the PET bottles. It operates through friction, and the system can remove 90-98% of the labels efficiently.

Crusher (2 Sets)

The PET bottles are then crushed into flakes of the desired size (usually around 12mm), using high-power crushers. These machines utilize water for the crushing process to prevent contamination and reduce wear on the blades.

Key Specifications:

Motor Power: 90kW

Number of Rotating Blades: 10

Number of Fixed Blades: 4

Screen Hole Size: φ12 mm

Floating Washer

The floating washer removes the labels, caps, and other contaminants through water. This process helps further clean the PET flakes before they move on to the next stage.

Key Specifications:

Screw Motor Power: 5.5 kW

Thumb-Wheel Motor Power: 3kW + 1.1 kW (frequency)

Rotating Diameter: φ380 mm

Length: 4200 mm

High-Speed De-watering Machine

The de-watering machine removes any remaining water and sediment from the washed flakes to ensure they are dry and ready for further processing.

Key Specifications:

Motor Power: 45 kW

Rotating Speed: 1800 rpm

Bearing: SKF

Steam Washer

The steam washer uses high temperatures (90-95℃) and caustic soda or other detergents to clean the flakes. This step ensures that any remaining impurities are removed, and the flakes meet the necessary food-grade standards.

Key Specifications:

Motor Power: 11 kW

Speed: 17 rpm

Volume: 6.5m³

Vibrating Screen

The vibrating screen sorts out any small flakes or powder from the washed PET flakes to maintain the quality of the final output.

Key Specifications:

Motor Power: 1.1 kW x 2

Capacity: >3000kg

Eddy Current Machine

The eddy current machine uses magnetic fields to separate any remaining metal contaminants from the PET flakes. The machine guarantees efficient separation of metallic impurities.

Key Specifications:

Magnetic Field Strength: 4200-4500GS

Polymer Color Sorter

The polymer color sorter is used to separate different polymers such as PVC, PC, PP, PE, PA, PLA, PS, and ABS from the PET flakes, ensuring only high-quality PET material remains.

Key Specifications:

Sorting Capacity: 3 tons/hour

Effective Sorting Width: 1500mm

Storage Silo

The cleaned PET flakes are then transferred into a storage silo for easy storage and transport. The silo is equipped with a pneumatic blower system to move the flakes efficiently.

Key Specifications:

Blower Power: 11 kW

Volume: 1.5 m³

Product Quality Standards
The recycled PET flakes meet the following quality requirements for food-grade use:

Viscose: 0.71 - 0.78 dl/g

Packing Density: 200-300 Kg/m³

Flakes Size: 1 mm - 12 mm

Water Content: < 1%

PE/PP: < 15 ppm

Inorganic Matter: < 10 ppm

PVC: < 30 ppm

Labels: < 15 ppm

Total Impurity Content: < 100 ppm

Conclusion
Boxin Machinery’s PET Bottle To Bottle Stage Washing Line is a cutting-edge solution for the recycling industry, turning waste PET bottles into high-quality food-grade rPET chips. With its high automation, customizable design, and focus on sustainability, it ensures the efficient and environmentally-friendly recycling of PET materials. This system supports the circular economy and contributes to reducing plastic waste, making it a vital part of sustainable recycling processes.