Plastic Washing Line Manufacturers

A complete plastic washing line typically comprises: an infeed conveyor and pre-washing trommel or drum washer for initial soil removal; a wet granulator or crusher that reduces material to flake size while wet (reducing dust and improving washing efficiency); a friction washer for mechanical scrubbing of flake surfaces; a sink-float separation tank where PE and PP flakes float and sink for density-based separation; a hot wash tank (for heavily contaminated or label-bearing material) at 70–90°C with surfactant or caustic; rinsing tanks to remove washing chemicals; a centrifugal dryer for mechanical moisture removal; and a thermal dryer (hot air dryer) for final drying to below 1% moisture. The full line configuration depends on the input material and contamination type. Clean post-industrial film may only need: pre-wash → friction washer → centrifugal dryer → thermal dryer. Heavily contaminated post-consumer bottles or agricultural film need the full sequence including hot wash.

Film washing lines handle flexible plastic waste — LDPE/LLDPE shrink film, agricultural mulch film, PP woven bags, and mixed flexible packaging. Film is difficult to handle mechanically due to its tendency to wrap around rotating parts. Film-specific washing lines use wet granulators that cut film in water, friction washers with appropriate clearances, and high-capacity centrifugal dryers designed for the lower bulk density of film flake. Rigid bottle washing lines handle HDPE, PP, and PET bottles from households or industrial collection. These lines typically include a pre-sorting stage (manual or optical), label removal (friction washer + label separator), hot wash for adhesive removal, and a floating wash to separate PP caps from HDPE bottle bodies. Mixed rigid plastic lines for commingled post-consumer rigid plastics are the most complex — typically requiring density separation, float-sink sorting, and potentially NIR optical sorting to achieve clean mono-material output. Confirm with the machinery manufacturer that the line design specifically addresses your input material and contamination profile.

Washing lines are quoted by wet throughput (input kg/hour of contaminated plastic). Typical ranges: small-scale line: 300–800 kg/hour; medium commercial line: 800–2,000 kg/hour; large industrial line: 2,000–5,000+ kg/hour. Water consumption: washing lines use significant water — typically 3–10 m³ per tonne of plastic processed, depending on contamination level and washing intensity. A closed-loop water treatment system (settlement tanks, filtration, and recirculation) is required to manage water consumption and wastewater compliance. Confirm the water treatment requirements with the machinery supplier and your local environmental permit conditions before investing. Energy consumption depends on line size and hot wash requirements — hot wash stages add significant thermal energy demand. Request the line's total connected power (kW) and specific energy consumption (kWh per tonne of output).