Waste-plastic pyrolysis solution

Start with polymer and contaminant testing, then define suitable feedstocks, exclusions, pretreatment and output validation.

Different plastics are not one feedstock; chlorine-bearing and flame-retarded materials need particular caution.

Plastic recycling industry

Identify polymers and contaminants before deciding whether pyrolysis fits

Plastic pyrolysis is mainly considered for streams that are difficult to recover at stable value through conventional mechanical recycling but remain identifiable and manageable. Polymer type, chlorine, moisture, flame retardants, metals and dirt affect pretreatment, wax management, condensation, corrosion and output quality.

Common project settings

Sorting and recycling centers

PE, PP and PS-rich residual streams after mechanical sorting can be assessed for pyrolysis suitability.

Packaging and film waste

Agricultural film, packaging film and woven bags require dirt, moisture, densification and feeding controls.

Industrial plastic scrap

Known-origin production scrap makes it easier to establish a repeatable feedstock specification.

Mixed-plastic treatment

Sampling, analysis and sorting must control PVC, PET, flame-retarded and other unsuitable components.

Plastics for priority assessment

  • Sorted and tested PE, PP and PS streams
  • Traceable industrial plastic scrap with stable composition
  • Washed, dewatered or densified film and packaging plastics
  • Mixed plastics supported by incoming inspection and batch control

Exclude or assess separately

  • PVC and other chlorine-bearing or halogenated flame-retarded plastics
  • PET and other oxygenated polymers as the primary oil-producing feedstock
  • High moisture, dirt, metals, glass and organic contamination
  • Mixed streams whose polymer composition cannot be controlled

Typical waste-plastic pyrolysis chain

01

Classify sources

Build the feedstock list by source, polymer, physical form and contamination.

02

Sort and pretreat

Shred, wash, dewater, densify and remove metals and unsuitable components.

03

Stabilize feeding

Configure storage, metering and closed feeding for film, lumps or granules.

04

Control thermal processing

Manage temperature, residence time, wax-forming components and cleaning intervals.

05

Separate and condense

Manage heavy fractions, staged condensation, process gas and safety controls.

06

Validate oil and residue

Test condensate, solids and gas conditions before defining upgrading, use or disposal.

Main material streams and downstream work

Plastic pyrolysis oil

Test chlorine, boiling range, water and stability before confirming fuel or chemical-feedstock outlets.

Wax and heavy fractions

Some plastics create waxy material that must be managed in heating, piping, separation and cleaning.

Non-condensable gas

It may be evaluated for process heating after treatment; the project defines surplus-gas handling.

Solid residue

Quantity and composition vary with feedstock and require testing before reuse or disposal.

Recommended inquiry inputs

  • Polymer composition or sorting results
  • PVC, PET and flame-retardant share
  • Moisture, dirt and other contamination
  • Feedstock photos, size and bulk density
  • Stable supply and batch variation
  • Target oil use and local acceptance conditions