{"id":18709,"date":"2026-04-29T08:00:00","date_gmt":"2026-04-29T06:00:00","guid":{"rendered":"https:\/\/www.energycle.com\/"},"modified":"2026-04-28T11:30:13","modified_gmt":"2026-04-28T09:30:13","slug":"plasticna-reciklacijska-susna-linija-vodic","status":"publish","type":"post","link":"https:\/\/www.energycle.com\/hr\/plasticna-reciklacijska-susna-linija-vodic\/","title":{"rendered":"Plasti\u010dna reciklacijska suha\u0107a linija: Uvod u konfiguraciju za PET, HDPE, PP i film"},"content":{"rendered":"\n

A plastic recycling drying line<\/strong> is the equipment cluster between a washing line and a pelletizer that reduces moisture from 30\u201370% (post-wash) down to the target your downstream process requires. The right line configuration depends on your input material, throughput, and end-product moisture spec \u2014 not on a one-size-fits-all template. This guide covers the five functional zones of a complete drying line, material-specific layouts for PET, HDPE\/PP, and film, equipment sizing rules, buffer strategy, automation, and integration with both your washing line (upstream) and extruder (downstream).<\/p>\n\n\n\n

If you’re researching whether you need a drying line, start with our plastic drying system pillar guide<\/a>. If you’ve already chosen specific equipment and need help with procurement, see the industrial centrifugal dryer buyer’s guide<\/a>. This article picks up after those decisions are made and focuses on how to lay out the line<\/em>.<\/p>\n\n\n\n

The 5 Functional Zones of a Plastic Recycling Drying Line<\/h2>\n\n\n\n

Every plastic recycling drying line, regardless of material or scale, contains the same five functional zones. The complexity (and capital cost) varies dramatically \u2014 but the structure is consistent.<\/p>\n\n\n\n

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  1. Reception zone<\/strong> \u2014 buffer hopper or vibrating screen that receives wet flakes from the washing line and feeds the dewatering equipment at controlled rate<\/li>\n\n\n\n
  2. Mechanical dewatering zone<\/strong> \u2014 centrifugal dewatering machine, screw press, or film squeezer that removes bulk water at low energy cost (30\u201360 kWh\/ton)<\/li>\n\n\n\n
  3. Inter-stage buffer<\/strong> \u2014 silo or hopper between mechanical dewatering and thermal drying, sized to absorb 15\u201330 minutes of flow variation<\/li>\n\n\n\n
  4. Thermal drying zone<\/strong> \u2014 pipeline hot air dryer, fluidized bed, or rotary drum that evaporates residual surface moisture (120\u2013180 kWh\/ton)<\/li>\n\n\n\n
  5. Discharge & storage zone<\/strong> \u2014 final hopper or silo where dried flakes accumulate before feeding the extruder, with moisture monitoring and dehumidified air management<\/li>\n<\/ol>\n\n\n\n

    For PET applications, two additional zones sit between thermal drying and discharge: a crystallizer<\/strong> (sheet\/bottle grades) and a desiccant pellet dryer<\/strong> (bottle-to-bottle only). These zones add $80,000\u2013$200,000 to a 1 ton\/h line but are non-negotiable for food-contact rPET.<\/p>\n\n\n\n

    Material-Specific Drying Line Configurations<\/h2>\n\n\n\n

    The right plastic recycling drying line layout differs significantly by input material. Here are the four production-grade configurations covering 95% of real-world recycling operations.<\/p>\n\n\n\n

    Configuration A: PET Bottle Flake Drying Line (1,000\u20133,000 kg\/h)<\/h3>\n\n\n\n

    The most demanding drying line in plastic recycling. PET requires moisture below 50 ppm for bottle-to-bottle, hydrolyzes at extrusion temperatures with residual water, and softens above 75\u00b0C \u2014 driving a 4-stage configuration with strict temperature control.<\/p>\n\n\n\n