The material selection of the main furnace of the pyrolysis plant is related to the service life, operation stability, operation safety, etc. of the entire project. If the material is too poor, the service life of the pyrolysis equipment may be shortened and there may be production risks. How to choose the main furnace of pyrolysis plant depends on several factors, including operating conditions, the type of raw materials, the durability and cost required of the main furnace, etc. The following are the two main materials of pyrolysis reactors commonly seen on the market:
1. Carbon steel
Carbon steel is commonly used in various industrial applications, including the reactors of pyrolysis equipment. The main difference lies in mechanical properties and chemical composition. Carbon steel has cost-effectiveness and durable strength, suitable for low-temperature pyrolysis, but has low corrosion resistance. For common pyrolysis raw materials such as waste tires and plastics, the cracking temperature is low and the corrosion is less, and carbon steel materials can fully cope with it, with high-cost performance. Carbon steel also has different models, such as Q245R and Q345R. For a pyrolysis plant, if the application requires high strength with high pressure and temperature requirements, Q345 will be a better choice. If the application does not require such high strength and the cost is limited, Q245 may be a suitable substitute.
2. Stainless steel
The commonly used stainless steel materials for the pyrolysis reactor are 304 stainless steel and 316 stainless steel, which have good corrosion resistance and mechanical properties at high temperatures. If there are PVC plastics in your waste plastics, or you want to recycle oil sludge(such as coal tar residue, oil sludge pollutants, hazardous waste, etc.), then ordinary carbon steel materials are not enough to withstand the corrosiveness and excessive pyrolysis temperature. It is better to use stainless steel as the main furnace material of the pyrolysis plant, which not only extends the service life of the main furnace but also alleviates the coking phenomenon of some raw materials. Compared with carbon steel, the cost of stainless steel materials is higher, which will also make the overall cost of the equipment more expensive.
