What is the difference between External Rotary continuous pyrolysis plant and Internal Screw (auger) Rotary Continuous Pyrolysis Plant?
Many buyers only notice the structural difference between two mainstream continuous pyrolysis reactors: one with a rotating cylinder, the other with a rotating central shaft. However, their core operational gap lies in anti-coking performance and sealing design.
- Rotating Cylinder (External Rotary Reactor, Drum running model continuous pyroysis plant)
This type relies on the whole rotating cylinder to convey materials. It is not equipped with an integrated anti-coking system. Once coke accumulates on the inner wall, heat transfer efficiency drops sharply. As a result, the reactor has to be shut down for cleaning every single month.
For sealing, it adopts traditional graphite packing as seals. After long-term operation, the packing will lose elasticity, leading to constant leakage of oil gas inside the main furnace.
- Central Shaft Rotary Furnace (Internal Rotary Reactor, Screw running model continuous pyrolysis plant)
Its outer shell stays static, while the central shaft with guide flights pushes raw materials forward axially. The rotating flights continuously scrape coke off the furnace wall during operation, serving as an in-situ anti-coking mechanism. This design enables stable continuous operation for up to 3 months without shutdown for decoking.
It is fitted with heavy-duty mechanical seals instead of graphite packing. The sealing structure maintains stable tightness over long running hours and effectively eliminates oil and gas leakage inside the reactor.
Closing takeaway
When selecting waste tire pyrolysis equipment, do not judge performance merely by names. Focus on anti-coking capacity and reliable sealing solutions to cut downtime and avoid flammable gas leakage risks.