What is the difference between batch type and semi-continuous pyrolysis machine?

DOING has developed a range of pyrolysis machines to meet the varying needs of customers, including batch type, semi-continuous, and fully continuous designs. While many customers understand the distinction between batch and fully continuous pyrolysis machines, the differences between batch and semi-continuous types can sometimes be unclear. Then this article will explain the key differences between batch type and semi-continuous pyrolysis machine for you:

Difference between batch type and semi-continuous pyrolysis machine

1. Feedstock type

Batch type pyrolysis machine is more flexible in terms of handling different types of feedstock on a per-batch basis, such as waste tires, plastics, oil sludge, aluminum plastic, which almost don't need to have any pretreatment. While for semi-continuous pyrolysis machine, due to the special design of feeder, we need to process raw material into small particles, such as processing waste tires into rubber powder between 16-18 mesh.

Feedstock difference between batch type and semi-continuous pyrolysis machine

2. Feeding method

For batch type pyrolysis machine, the materials are fed into the pyrolysis furnace by a hydraulic feeder. Due to the open feeding design, the environmental protection factor is relatively low‌. Semi-continuous pyrolysis machine uses a sealed feed-screw conveyor system, in which tires or plastics need to be broken small particles before feeding, and feed is added continuously to increase feed efficiency.

Feeding methods of batch type and semi-continuous pyrolysis machine

3. Operation efficiency

The production cycle of batch type pyrolysis machine is long due to the need for frequent operations such as heating, cooling, slagging and recharging. Generally the completation of a production cycle needs one day. The semi-continuous pyrolysis machine is more efficient due to the automatic feeding and hot slag extraction system, which can realize three production cycles in two days.

4. Slagging method

For batch type pyrolysis machine, we need to stop the operation process and cool the pyrolysis furnace to about 50°C, then we can discharge the carbon black and steel wire; for semi-continuous pyrolysis machine, carbon black removal and raw material feeding are carried out simultaneously, and there is no need to cool the pyrolysis furnace.

Slagging methods of batch type and semi-continuous pyrolysis machine

5. Degree of automation

Batch pyrolysis machine typically requires manual operation for feeding and final products discharging and are more labor intensive, typically requiring 2-3 people to operate. Semi-continuous pyrolysis machine uses intelligent control, less labor, low labor intensity, and typically only 1-2 people can operate them.

DOING PLC control system with different automatic degree

After this analysis, you should have a clear understanding of the difference between batch type and semi-continuous pyrolysis machines. Of course, the cost of semi-continuous pyrolysis machine is higher than the batch type. If you would like more details, please contact DOING or visit in person.‌ As a professional manufacturer and supplier of pyrolysis machines, DOING will provide the most suitable machine scheme for you.