PET Bottle Washing Line & Recycling System
PET Bottle Washing Line for Clean, Dry rPET Flakes
Configure a PET bottle washing line around your bottle source, contamination level, required throughput, and downstream flake specification. The system combines selected sorting, size-reduction, washing, separation, and drying stages. Final flake quality and utility requirements are confirmed for the agreed feedstock and line configuration.
Overcome Recycling Inefficiencies
Traditional systems often suffer from high contamination rates and excessive maintenance costs. Our design addresses these specific mechanical and process failures.
Challenge: High Contamination
Solution: Multi-stage hot washing and high-speed friction scrubbing remove glue, oil, and labels. The process targets low impurity levels and consistent flake cleanliness tailored to downstream processing specifications.
Challenge: High Operational Costs
Solution: Multi-stage closed-loop water filtration and recirculation significantly reduce freshwater make-up, while automated PLC controls streamline operations and minimize manual intervention.
Challenge: Frequent Downtime
Solution: Critical components use D2/SKD-11 alloy and SUS304 stainless steel. This heavy-duty construction minimizes wear and maintenance intervals.
System Capabilities
<100ppm Impurity
Produce rPET flakes with <100ppm total impurities. Material meets premium grade standards.
PLC Automation
PLC system enables precise control and real-time monitoring. Automation limits human error.
Resource Efficiency
Recirculating water system minimizes waste. Energy-efficient motors reduce power consumption.
Heavy-Duty Construction
Built with durable materials for continuous 24/7 operation. Requires minimal maintenance.
Customizable Capacity
Configurations available from 500 to 3,000 kg/h. Designs adapt to specific plant layouts.
Comprehensive Support
Includes plant design, installation, and operator training. Technical support is available for the machine’s lifetime.
Washing Is the Critical Quality Gate Before Pelletizing
PET recycling profitability depends on stable washing, separation, and drying. If you plan downstream extrusion, see Plastic Pelletizers.
Process Overview
Sequential washing and separation stages ensure consistent output quality.
1. Automated Bale Breaker
Function: Breaks apart compressed PET bottle bales. Ensures a steady, metered flow of material into the line.
Configuration:
- High-torque motors
- Adjustable speed control
- Heavy-duty frame
2. Trommel Screen
Function: Removes heavy contaminants like sand, glass, and metal. Separates loose caps and labels through tumbling action.
Configuration:
- Customizable screen perforations
- Wear-resistant internal drum
- Optimized rotation angle
3. Wet Granulator (Crusher)
Function: Crushes bottles into uniform flakes. Uses water to cool blades and flush initial contaminants.
Configuration:
- V-type rotor design
- D2/SKD-11 hardened steel blades
- Interchangeable screens
4. Hot Washer System
Function: Dissolves glue, oil, and residues using 85–95°C water and chemical agents. High-friction agitation ensures thorough cleaning.
Configuration:
- SUS304 stainless steel tank
- High-speed agitator
- Auto-dosing system
5. Sink/Float Separation Tank
Function: Separates heavy PET flakes from lighter PP/PE caps and labels using water density. Paddles move floating material to discharge.
Configuration:
- Full SUS304 construction
- Surface-skimming paddles
- Bottom screw conveyor
6. Dewatering & Thermal Drying System
Function: Removes moisture in two stages. Centrifugal dewatering removes bulk water, followed by hot air drying to <1% moisture.
Configuration:
- High-speed dynamic rotor
- Temperature control system
- Stainless steel piping
System in Action
Observe the transformation from post-consumer bottles to clean flakes.
Commercial Applications
Polyester Staple Fiber (PSF)
Raw material for textiles, carpets, and non-woven fabrics.
Bottle-to-Bottle Base Flake
Preparation of high-purity washed flakes for downstream decontamination and SSP pelletizing lines.
PET Strapping
Manufacturing of high-strength industrial packaging straps.
PET Sheet & Film
For thermoformed packaging, trays, and food containers.
Performance Comparison
| Feature | Our System | Conventional Washing Lines |
|---|---|---|
| Final Purity | <100 ppm target (Process-dependent high-purity flake) | >500 ppm (Typically limited to coarse fiber or strapping grade) |
| Washing Technology | Hot chemical wash + high-speed friction | Ambient cold water wash without chemical dosing |
| Automation Level | Full PLC intelligent control | Distributed manual controls requiring higher operator staffing |
| Water Consumption | Low consumption with water filtration & recycling | Single-pass water circuit with higher discharge rates |
| Machine Lifespan | Wear-resistant steel & stainless steel components | Standard carbon steel construction requiring frequent anti-corrosion maintenance |
Purity values represent reference design targets for agreed post-consumer bottle feedstock, sorting scope, and washing configurations, rather than unconditional guarantees. Final parameters are confirmed based on representative sample testing.
Technical Specifications
Final Flake Quality Standards
| Parameter | Reference Target Baseline |
|---|---|
| Total Impurity | <100 ppm |
| PVC Content | <50 ppm |
| PP/PE Content | <20 ppm |
| Metal Content | <20 ppm |
| Moisture Content | <1% |
| Flake Size | 12-16mm (Customizable) |
Production Line Models & Configurations
| Nominal Baled Feed | Main Motor Power | Footprint & Maintenance Area | Required Staff | Freshwater Make-up |
|---|---|---|---|---|
| 500 kg/h | 220 kW | 400 m² | 2–3 operators/shift | approx. 1 m³/h |
| 1,000 kg/h | 500 kW | 750 m² | 3–4 operators/shift | approx. 3 m³/h |
| 2,000 kg/h | 700 kW | 1,000 m² | 4–5 operators/shift | approx. 5 m³/h |
| 3,000 kg/h | 900 kW | 1,500 m² | 5–6 operators/shift | approx. 6 m³/h |
Engineering Parameters & Yield Baseline: Nominal capacity is based on standard baled post-consumer PET bottles (unflattened/baled, contamination ≤5%, label ≤8%, cap ≤4%). Clean dry flake output yield typically ranges from 72%–82% depending on bottle source and label removal efficiency. Main motor power covers core mechanical drives; thermal energy for hot washing (steam/thermal oil boiler) is sized separately. Freshwater consumption assumes a closed-loop settling and recirculation system. Required area covers main machine layout with standard maintenance clearance; raw bale staging and finished flake storage require separate plant footprint allocation.
1,000 kg/h Reference Project Scope & Battery Limits
| Engineering Area | Supply Scope & Battery Limits (1,000 kg/h Reference System) |
|---|---|
| Feedstock Assumption | Post-consumer baled PET bottles (≤5% non-PET contamination, ≤8% label, ≤4% cap; nominal 1,000 kg/h baled feed yields approx. 720–820 kg/h clean dry flakes) |
| Energycle Machinery Scope | Automated bale breaker, trommel screen, de-labeler, wet granulator, continuous hot washer (85–95°C with auto-dosing), high-speed friction washer, sink/float separation tank, centrifugal dewaterer, pipeline hot air drying, and bagging silo |
| Electrical & Automation | Centralized PLC control cabinet with touchscreen HMI, variable frequency drives (VFDs), safety interlocks, and emergency stop circuits for all line motors |
| Buyer Utility Interface: Power | Main incoming electrical cabling connected to the central control panel (3-phase 380V/480V, 50/60 Hz as specified) |
| Buyer Utility Interface: Thermal & Water | Steam boiler or thermal fluid heater connection for hot wash tank (0.4–0.6 MPa steam); closed-loop settling ponds, water storage reservoirs, and effluent treatment discharge connection |
| Buyer Utility Interface: Compressed Air & Plant | Clean dry compressed air supply (≥0.6–0.8 MPa); concrete foundations, drainage channels, building ventilation, and adequate staging area for raw bales and finished big-bags |
Frequently Asked Questions
Find answers to common questions about our PET recycling lines.
What does a PET bottle recycling washing system include?
A standard Energycle PET bottle washing line is built around 6 core engineered modules: (1) Automated Bale Breaker, (2) Trommel Pre-Screen, (3) Wet Granulator, (4) Continuous Hot Washer (85–95°C with NaOH), (5) Sink/Float Density Separation Tank, and (6) Dewatering & Thermal Drying System. For high-contamination streams or demanding downstream flake specifications, the line seamlessly integrates optional upstream units including a high-efficiency delabeler (label remover), manual or optical bottle sorting conveyors, and intermediate high-speed friction washers.
Can this washing line produce material for bottle-to-bottle applications?
The washing line prepares PET flakes for the agreed downstream process. Food-contact suitability cannot be established from flake purity or washing alone; it depends on feedstock controls, the validated recycling and decontamination process, and the requirements for the intended use. Confirm the washing scope, downstream treatment, testing, and documentation required for your project.
What types of PET bottles can this line process?
The line processes various post-consumer bottles, including soft drink, water, and oil bottles. We configure additional pre-washing units for heavily contaminated materials.
What is the lead time for a complete system?
Standard lead time is 60-90 days. This timeline varies based on capacity and specific customization requirements.
Do you provide installation and training?
Yes. Our engineering team handles on-site installation, commissioning, and testing. We also train operators and maintenance staff.
What is the warranty policy?
Equipment includes a one-year warranty on manufacturing and materials. We provide free replacement parts during this period and offer lifetime technical support.
How much does the system cost?
Price depends on capacity and automation level. Contact our engineering team for a specific quotation based on your raw material and output requirements.
Ready to Upgrade Your Recycling Business?
Contact us for a technical proposal and quotation. Our team responds within 24 hours.
- Share your bottle source, contamination level, and target output.
- Tell us your expected throughput and automation preference.
- We will recommend a matched washing, drying, and downstream layout.
Talk to Sales
Send your PET bottle feedstock details and target flake quality. We will reply with a matched proposal.
Related: For a side-by-side comparison of capacity tiers, 3-year TCO, and regional fit, see our PET recycling machines buyer’s guide.