Process flow of plastic pyrolysis oil production line

The process flow of DOING plastic pyrolysis oil production line mainly includes feeding, heating, dewaxing, cooling, recycling of tail gas, carbon black slag discharge and other steps. ‌

1.‌ Feeding

The waste plastic is fed into the DOING reactor through the feeder. According to the water content of the plastic, the dry plastic can be fed directly, while the wet plastic needs to be processed to decrease the water content.

Waste plastic feeding for pyrolysis machine

2. Heating

The plastic is heated in the reactor by an external heating source to a temperature, usually between 320 and 380°C, in order to break the plastic molecular chain.

3. Dewaxing

Plastic pyrolysis is similar to tire pyrolysis in its basic principle, but there are also some differences. Wax is produced during the cracking of plastics, especially PE plastics. If there is no special design for this, it will seriously block the air outlet and condenser, greatly affecting the production efficiency of the equipment. In this regard, DOING has a special dewaxing design, which converts the viscous paraffin wax into liquid oil after cooling by a condenser. This not only reduces the risk of clogging, but also increases its oil yield.

Dewaxing system of DOING waste plastic pyrolysis machine

4. Cooling

The oil and gas produced by heating is condensed into oil by a cooling system. Here provides two kinds of cooling system: tube condenser cooling system and water tank cooling system, which have different advantages. For the tube condenser cooling system, which adopts the three-step cooling system to realize industrial cooling effect; for the water tank cooling system, it is convenient to transport and install. Customers can select the suitable one based on their requirements.

Two types of DOING cooling system

5. Exhaust gas recycling

Part of the combustible but non-condensable gas produced in the pyrolysis process is called "Syn gas", which can be directly recycled for heating pyrolysis reactor to save fuel.

6. Carbon black diacharging

After the DOING pyrolysis process is finished, the residual substances inside the reactor need to be discharged, which are mainly carbon black.

Carbon black discharging system of DOING pyrolysis machine

After going through the whole process flow of plastic pyrolysis oil production line, we can obtain the plastic pyrolysis oil from the waste plastics, but not all waste plastics can be recycled to pyrolysis oil, such as PVC and PET are not suitable for pyrolysis machines, and the type and purity also will affect the quality and quantity of the obtained plastic pyrolysis oil.

DOING pyrolysis machine for sale

As a mature manufacturer and supplier of plastic pyrolysis machines, DOING has over 14 years experience in helping our customers carry out plastic pyrolysis projects. And in addition to detailed display of whole work process, DOING also can customize suitable machine schemes based on customer's requirements, display real project pictures and videos, etc. Moreover, DOING also provides other equipment to help our customers expand the processing final products: distillation machine for plastic pyrolysis oil, briquette machine for carbon black, etc. For more details, please call DOING without any hesitation.