What are the requirements of humidity and size of used tires pyrolysis? Does it need tire shredders?

As the global demand for sustainable waste management grows, used tire pyrolysis has become a prominent solution for recycling end-of-life tires. This process converts waste tires into valuable resources such as pyrolysis oil, carbon black, and steel wire through thermal decomposition in an oxygen-free environment. However, to achieve optimal efficiency and output quality, certain pre-processing requirements must be met—particularly regarding humidity, tire size, and the need for shredding equipment.

1. Humidity Requirements for Tire Pyrolysis

Used tires generally contain very low moisture content, especially when stored properly. However, excess humidity can negatively impact the pyrolysis process in several ways:

• Lower Thermal Efficiency: Moisture in the feedstock absorbs heat during pyrolysis, increasing energy consumption and reducing system efficiency.
• Reduced Oil Yield: Water vapor can interfere with the pyrolysis process, lowering the quality and quantity of pyrolysis oil.
• Corrosion Risk: Excess moisture may contribute to rusting inside reactors and pipes, increasing maintenance costs.

Ideal Condition:

Tires used for pyrolysis should be as dry as possible, preferably with a humidity level below 15%. If stored outdoors, tires should be protected from rain and ground moisture to maintain optimal conditions.

2. Tire Size Considerations

The physical size of the used tires greatly affects the pyrolysis process:

Larger Tires: Whole tires take longer to heat and decompose, requiring more energy and time for complete pyrolysis.

Smaller Pieces: Cutting or shredding tires into smaller chunks increases surface area, allowing for faster and more uniform heat transfer, leading to improved output quality.

While for used tire shredding, for batch type pyrolysis machine, it can process the whole used tires directly; and for continuous pyrolysis machine, it's better to shred used tires into small pieces, which can not only contribute better heat distribution to improve pyrolysis efficiency, but also can make full use of reactor space and improve work automation.

In a word, for used tire pyrolysis, the humidity and size of used tires will influence the whole work efficiency and the quality of obtained final products. And in addition to considering the raw material, if you want to enhance the whole performance of the used tire pyrolysis recycling project, used tire pyrolysis machine is another key point. Huayin used tire pyrolysis machine has undergone many technological innovations to meet market development and customer needs, which has been transported to various countris and successfully set up the pyrolysis projects. If you also are interested in our used tire pyrolysis projects, just feel free to send the inquiry to us!