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.

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.

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 (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 — significantly lowering drying energy consumption.
• 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 ensures consistent output quality across all 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 — meeting the compliance requirements of European and international buyers.

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 (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. This two-stage mechanical process removes the majority of surface water, 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.

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.

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 all types of woven polypropylene bulk packaging including FIBCs (Flexible Intermediate Bulk Containers), jumbo bags, ton bags, and woven PP sacks. The line handles bags with heavy contamination from sand, soil, chemical powders, cement dust, fertilizer residues, food powders, and moisture — without requiring manual pre-cleaning before shredding. Severely damaged or non-PP bags are removed during the initial inspection stage.

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

Standard shredders cannot process woven PP fabric reliably because the long, flexible fibers wrap around the rotor shaft, causing jams, overloads, and equipment damage. The anti-winding shredder used in the SUHUI PP jumbo bag washing line features a specially designed rotor geometry that tears and cuts woven PP fabric into manageable pieces without shaft entanglement. This is the most critical piece of equipment in any jumbo bag recycling line and directly determines whether the system can operate continuously without unplanned downtime.

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. The output meets quality requirements for manufacturing new industrial woven bags, packaging film, injection-molded products, and recycled PP pellets for general industrial use. The specific purity level depends on input bag contamination levels, the number of washing stages selected, and downstream application requirements. SUHUI engineers can recommend the appropriate washing configuration based on the target output quality.

What processing capacity options are available?

The SUHUI PP jumbo bag recycling washing line is available in five standard model configurations: SHW300 (250–300 kg/h), SHW500 (400–500 kg/h), SHW1000 (800–1,000 kg/h), SHW1500 (1,250–1,500 kg/h), and SHW2000 (1,700–2,000 kg/h). Space requirements range from 29m × 10m × 5m for the SHW300 to 90m × 15m × 6m for the SHW2000. Contact SUHUI for capacity recommendations based on your available feedstock volume, facility footprint, and downstream production requirements.

How does the line handle heavy contamination inside the bags?

The multi-stage washing sequence is specifically designed for heavy contamination. Shredded PP flakes first pass through a wet granulator for size reduction and initial pre-washing, then enter a pre-wash tank to remove loose sand and debris. They then pass through a hot alkaline wash tank at 60–80°C where heated caustic solution dissolves chemical residues, oils, and stubborn contamination. High-speed friction scrubbers mechanically scour flake surfaces to remove embedded particles. A float-sink separation tank removes any remaining sand or stone fragments that survived the washing stages. This sequence ensures consistent cleaning even for heavily soiled bags containing cement powder, fertilizers, or chemicals.

What moisture content does the line achieve?

The SUHUI PP jumbo bag washing line uses a two-stage mechanical dewatering process — a centrifugal dryer followed by a screw press — to reduce surface moisture to below 12% after washing. The subsequent thermal drying stage (hot air dryer with cyclone) then reduces final flake moisture content to below 5%, producing dry output suitable for direct pelletizing or reuse. This two-stage approach reduces thermal drying energy consumption compared to single-stage drying systems.

Can the recycled PP be used to make new bags?

Yes. Clean, dry PP flakes from the washing line can be fed directly into a pelletizing extruder to produce recycled PP pellets. These pellets are commonly used as raw material for manufacturing new woven polypropylene bags and sacks, packaging film, injection-molded containers, and other PP plastic products. The proportion of recycled PP content that can be incorporated into new products depends on the application specification and the purity level of the recycled material. SUHUI can provide integrated washing and pelletizing line solutions for closed-loop bag recycling operations.