PP Jumbo Bag Recycling Washing Line

The SUHUI PP jumbo bag recycling washing line is a specialized system designed to recycle used polypropylene (PP) bulk bags, FIBCs (Flexible Intermediate Bulk Containers), and ton bags into clean, reusable PP flakes or pellets. These woven PP bags accumulate heavy contamination from bulk material transport, including embedded sand, soil, chemical powders, and moisture, requiring more intensive processing than standard plastic film recycling. Woven PP bags and soft LDPE film follow different washing routes; the plastic film recycling line guide sets out where the two processes diverge.

The line addresses the unique challenge of woven PP bag recycling with an anti-winding shredder that prevents bag fabric from wrapping around rotor blades, followed by multi-stage hot washing, intensive friction scrubbing, and two-stage mechanical dewatering to produce high-purity PP flake output. Recycled pellets meet quality requirements for manufacturing new industrial bags, packaging film, and injection-molded plastic products.

Configurable for capacities from 300 to 2,000 kg/h, the system is suitable for both small recycling operations and large-scale FIBC recovery facilities. All structural components are manufactured from S.S 304 stainless steel to withstand continuous exposure to hot water, alkaline solutions, and chemically contaminated bag waste.

PP jumbo bag recycling washing line workflow from sorting, anti-winding shredding, wet granulation, washing, separation, two-stage dewatering, drying, optional pelletizing and packaging.

Key Features of SUHUI PP Jumbo Bag Recycling Washing Line

• Anti-Winding Shredder: Specially designed rotor geometry prevents woven PP fabric from wrapping around the shredder shaft, the most critical requirement for reliable jumbo bag processing.
• Heavy Contamination Handling: System is designed to process bags containing residual sand, chemical powders, soil, and moisture without pre-cleaning or manual preparation.
• Multi-Stage Hot Washing: Sequential pre-wash, hot wash at 60–80°C, and alkaline chemical wash progressively remove embedded dirt, chemical residues, and surface contaminants from shredded PP flakes.
• High-Speed Friction Scrubbing: Intensive friction washers mechanically scour PP flake surfaces to remove stubborn embedded contaminants that hot washing alone cannot eliminate.
• Two-Stage Mechanical Dewatering: A centrifugal dryer followed by a screw press removes the majority of surface moisture, reducing flake moisture content to below 12% before thermal drying and lowering drying energy demand.
• Thermal Drying System: Hot air drying with cyclone separation reduces final moisture content to below 5%, producing dry PP flakes ready for pelletizing or direct reuse.
• Closed-Loop Water Recycling: Optimized water circulation and heat recovery systems minimize fresh water consumption and reduce wastewater treatment requirements.
• Fully Automated Operation: PLC-controlled line operation minimizes manual intervention and supports consistent output quality across production shifts.
• S.S 304 Stainless Steel Construction: All wetted components and structural frames are fabricated from S.S 304 stainless steel for long-term corrosion resistance and hygienic operation.
• Certified to International Standards: CE, ISO9001:2008, QS, and GMP certified to meet the compliance requirements of European and international buyers.

The PP jumbo bag washing process targets sand, soil, chemical powders, cement dust, fertilizer residues, moisture, oils and embedded particles through dedicated sorting, shredding, washing, separation, dewatering and drying stages.

PP Jumbo Bag Recycling Washing Line Technical Data

Exact configuration depends on feedstock contamination level, facility layout, and downstream requirements. Contact SUHUI for a customized technical proposal.

Standard PP jumbo bag washing line configurations support 300 to 2,000 kg/h input capacity, 10–20 mm flakes, 60–80°C hot washing, below 12% moisture after mechanical dewatering, and below 5% final moisture after thermal drying.

PP Jumbo Bag Recycling Washing Line Process

1. Bag Sorting & Inspection: Incoming jumbo bags are inspected and sorted. Severely contaminated or non-PP bags are removed to protect downstream equipment and output quality.
2. Anti-Winding Shredding: Whole jumbo bags are fed into the anti-winding shredder, which tears and cuts the woven PP fabric into manageable pieces without shaft wrap-around or jamming.
3. Wet Granulation: A wet granulator further reduces shredded material to uniform 10–20 mm flakes while simultaneously pre-washing loose surface contamination in the first water contact stage.
4. Pre-Washing: Shredded PP flakes enter a pre-wash tank where ambient water removes loose sand, soil, and surface debris in the first dedicated contamination reduction stage.
5. Hot Alkaline Washing: Flakes are immersed in a heated wash tank at 60–80°C with alkaline cleaning solution that dissolves chemical residues, oils, and stubborn contamination from flake surfaces.
6. Friction Washing: High-speed friction scrubbers intensively clean flake surfaces, removing embedded particles and residual contaminants that survive the hot washing stage.
7. Float-Sink Separation & Rinsing: Water separation tanks remove sand, stones, and heavy contaminants that sink, while clean PP flakes float and are collected. Flakes are then rinsed with clean water to remove residual cleaning solution.
8. Two-Stage Mechanical Dewatering: Clean PP flakes pass through a centrifugal dryer followed by a screw press, reducing flake moisture content to below 12% before entering the thermal drying stage.
9. Thermal Drying: A hot air drying system with cyclone separation eliminates residual moisture, producing dry PP flakes with final moisture content below 5%.
10. Pelletizing (Optional): Dried PP flakes are fed into a single-screw or twin-screw extruder, melted, filtered, and extruded into uniform recycled PP pellets.
11. Screening & Packaging: Pellets or flakes are screened to remove oversized particles, then conveyed to storage silos or bagged for sale or further manufacturing use.

Final line configuration should be matched to feedstock type, contamination level, capacity target, washing intensity, dewatering and drying requirement, optional pelletizing, facility layout and downstream product.

Clean PP Flake and Pellet Output Applications

Clean, dry PP flakes from the washing line can be reused directly in suitable industrial applications or fed into a pelletizing extruder to produce recycled PP pellets. These pellets are commonly used for manufacturing new woven polypropylene bags and sacks, packaging film, injection-molded containers, and other general industrial PP products.

Clean PP flakes and optional recycled PP pellets can be used for new woven bags, packaging film, injection-molded products and general industrial PP products when matched to the required output specification.

Closed-Loop Water Recycling System

The PP jumbo bag washing line uses optimized water circulation across pre-washing, hot alkaline washing, friction scrubbing, float-sink separation and rinsing. Process water can be filtered, treated, reheated where required, and recirculated back into the washing process to reduce fresh water demand and wastewater discharge.

Closed-loop water recycling helps stabilize process water quality across washing stages while supporting lower fresh water consumption and reduced wastewater handling requirements.

Frequently Asked Questions

What types of PP bag waste can the washing line process?

The SUHUI PP jumbo bag recycling washing line is designed to process woven polypropylene bulk packaging including FIBCs, jumbo bags, ton bags, and woven PP sacks. It handles bags with contamination from sand, soil, chemical powders, cement dust, fertilizer residues, food powders, and moisture.

Why does PP bag recycling require an anti-winding shredder?

Standard shredders cannot process woven PP fabric reliably because the long, flexible fibers can wrap around the rotor shaft. The anti-winding shredder uses dedicated rotor geometry to tear and cut woven PP fabric into manageable pieces without shaft entanglement.

What is the output quality of recycled PP flakes from this line?

Properly processed PP flakes from the SUHUI washing line are clean and dry, with final moisture content below 5% after thermal drying. Specific purity depends on input bag contamination, selected washing stages, and downstream application requirements.

What processing capacity options are available?

The line is available in five standard model configurations: SHW300 at 250–300 kg/h, SHW500 at 400–500 kg/h, SHW1000 at 800–1,000 kg/h, SHW1500 at 1,250–1,500 kg/h, and SHW2000 at 1,700–2,000 kg/h. Model selection depends on more than throughput; see film washing line configuration for how contamination level and film type change the module list.

How does the line handle heavy contamination inside the bags?

The multi-stage washing sequence combines wet granulation, pre-washing, 60–80°C hot alkaline washing, high-speed friction scrubbing, float-sink separation, rinsing, mechanical dewatering, and thermal drying to remove loose debris, chemical residues, oils, heavy contaminants, and moisture.

What moisture content does the line achieve?

The line uses two-stage mechanical dewatering, a centrifugal dryer followed by a screw press, to reduce surface moisture below 12% after washing. Thermal drying then reduces final flake moisture below 5%, making the output suitable for pelletizing or reuse.

Can the recycled PP be used to make new bags?

Yes. Clean PP flakes can be pelletized into recycled PP pellets for new woven polypropylene bags and sacks, packaging film, injection-molded containers, and other PP products. The usable recycled content depends on the product specification and recycled material quality.