Waste tire oil refining

Waste tire oil refining

Waste tire oil refining adopts oxygen-free pyrolysis technology. In a sealed, oxygen-free and slightly negative pressure environment, waste tires are heated to 320–450℃ to break the polymer hydrocarbon chains of rubber and convert them into oil-gas mixture. After condensation and separation, pyrolysis oil is obtained, with by-products including combustible tail gas, carbon black and waste steel wire. The whole process realizes self-sufficiency of energy and resource recycling.

• Raw Material PretreatmentWhole waste tires are shredded and cut into 2–5cm rubber blocks to remove sediment, fiber and surface impurities, improving the subsequent oil yield.

  
  

• Sealed FeedingIt is divided into batch type and continuous type. The batch type feeds materials into the pyrolysis reactor by hydraulic pressure and seals the furnace door; the continuous type adopts a screw conveyor for fully automatic continuous feeding.

  
  

• High-temperature Pyrolysis (Core Process)The equipment adopts indirect heating and strictly maintains an oxygen-free slight negative pressure state. Rubber softens and light components volatilize at 180–220℃; the main pyrolysis and gas production peak occurs at 260–350℃; deep pyrolysis at 350–450℃ ensures complete reaction.

  
  

  
  

• Oil-Gas Condensation and SeparationHigh-temperature oil gas enters the multi-stage condensation system and is cooled and liquefied into waste tire pyrolysis oil. The non-condensable combustible tail gas is desulfurized and purified, then recycled into the pyrolysis furnace for self-use as fuel.

  
  

• Solid Residue Separation & TreatmentThe residue after pyrolysis is discharged by water cooling. Magnetic separation equipment separates waste steel wire and crude carbon black. Steel wire can be recycled for steelmaking, and carbon black can be grinded and modified for sales.

  
  

• Environmental Flue Gas PurificationThe flue gas generated by equipment combustion is treated by dust removal, desulfurization and denitrification systems, and discharged safely up to standard without secondary pollution.