Waste plastic pyrolysis equipment

Waste plastic pyrolysis plant

A plastic name is not a substitute for its resin composition. RUNDA prioritizes traceable PE, PP and PS streams, together with qualified mixed plastics that can be sorted and controlled by batch, and configures shredding, washing, dewatering, compaction, stable feeding, wax management, staged condensation and oil validation accordingly.

Published models and values are references for early comparison. Final capacity, weight, power, shipment and configuration remain subject to confirmed technical documents.

Classify the plastics first, then establish a stable plastic-to-oil route

  • Suitable plastics are sorted, shredded, dried or compacted before entering a sealed reaction system, where controlled pyrolysis produces vapour, non-condensable process gas and solid residue. Wax removal, separation and staged condensation are required before a testable plastic pyrolysis oil is obtained.
  • PE, PP and PS are normally the first candidates for assessment. PVC, high-chlorine plastics, flame-retarded materials and heavily contaminated mixed plastics affect corrosion, emissions, wax blockage and oil use, and must be tested, excluded or handled through a dedicated pretreatment route.

Product overview

  • Feedstock

    PE, PP, PS, tested mixed plastics and prepared film

  • Main outputs

    Plastic pyrolysis oil, process gas, residue and feedstock-dependent wax

  • Key challenges

    Sorting, chlorine control, wax management, condensation and residue routes

  • Selection inputs

    Polymer composition, moisture, chlorine, contamination, form and oil objectives

Process flow

  • Create a feedstock register by source, resin, form and contamination
  • Shred, sort, wash, dewater, compact and remove metals
  • Store, meter and feed in a sealed system according to bulk density
  • Carry out controlled pyrolysis while managing wax and cleaning intervals
  • Separate vapour, manage heavy fractions, remove wax and condense in stages
  • Treat process gas and assess energy reuse
  • Test condensate oil, wax, gas and solid residue separately

System composition

  • Feedstock sorting, shredding, washing, drying and storage
  • Film compaction, metered conveying and sealed feeding
  • Pyrolysis reaction, heating and insulation system
  • Heavy-fraction separation, wax removal, line heat tracing and cleaning interfaces
  • Staged condensation, oil reception and storage
  • Process-gas purification, pressure stabilization and safety control
  • Solid-residue cooling, sealed discharge and collection
  • Electrical, instrumentation, alarms, interlocks and operating-data records

Main outputs

  • Plastic pyrolysis oil

    Test chlorine, boiling range, water, stability, flash point, sulfur and metals against downstream requirements.

  • Non-condensable process gas

    May be assessed for system heating after treatment.

  • Solid residue

    Quantity and composition vary with feedstock and require testing before a compliant recovery or disposal route is selected.

  • Wax and heavy fractions

    Manage them in advance through vapour-line design, heating, separation, condensation and cleaning provisions.

Product and engineering features

  • Feedstock review before equipment selection
  • Wax control and condensation included in line design
  • Connection to downstream oil upgrading
  • Batch, semi-continuous and continuous route comparison

Frequently asked questions

  • Which plastics are usually suitable?

    PE, PP and PS are common candidates. Mixed plastics require composition, chlorine, moisture and contaminant testing.

  • Why is PVC a concern?

    Chlorine affects corrosion, gas treatment and oil quality, so PVC normally requires strict sorting or a dedicated route.

  • Can plastic pyrolysis oil be sold as diesel?

    Not by default. The oil must be tested against local standards and buyer requirements; upgrading may be required.

Selection basis

A plastic line begins with polymer identification, stable feeding and wax management

A plastic name does not define its composition. Films, rigid pieces and mixed feedstocks require different sorting, densification, feeding, vapour transfer and cleaning even when PE, PP or PS is present.

Polymer composition

Manage PE, PP, PS and other polymers by batch, with controls for PVC, PET and halogenated flame-retarded materials.

Physical form

Films, woven bags, rigid plastics and mixed flakes require different storage, conveying and dosing.

Wax and heavy fractions

Use feedstock tests and planned run length to define vapour paths, heavy-fraction handling, condensation and cleaning.

Oil objective

Testing and downstream specifications determine whether oil is evaluated for industrial fuel, distillation or deeper upgrading.

Confirm before technical selection

  • Polymer composition and sorting method
  • PVC, PET, flame retardants and contaminants
  • Moisture, dirt and metals
  • Feedstock size, form and bulk density
  • Batch variation and stable supply
  • Planned oil use and downstream specifications