With the increasing consumption of plastics, the disposal of waste plastics is becoming more and more concerning. Waste plastic pyrolysis technology, as an effective waste plastic treatment method, has gradually attracted people's attention. This article will provide an in-depth analysis of the principle of pyrolysis of waste plastics, and why stainless steel is needed for the main furnace to cope with its corrosiveness.
However, due to the presence of corrosive elements such as chlorine and sulfur in the waste plastics, as well as the acid gas generated during the cracking process, the inner wall of the main furnace is susceptible to corrosion.
Pyrolysis of waste plastics refers to the process of decomposing plastics at high temperatures to produce oil, gas and other products in an oxygen-free or low-oxygen environment. The core equipment of waste plastic refining technology is the main furnace, which needs to run for a long time in a high-temperature environment, and in this process, the macromolecular chains in the waste plastics are broken at high temperatures to form small molecules. Different plastic types and pyrolysis conditions can affect the variety and yield of the product. However, there are some corrosive chemicals that can be produced in this process. Under the long-term action, the corrosion continues to intensify, and eventually leads to the main furnace burn-through, these corrosive substances may not only cause damage to the metal part of the equipment, reduce the service life of the equipment, and seriously affect the production safety.
In the process of equipment manufacturing, stainless steel is widely used in waste plastic pyrolysis and refining equipment because of its excellent corrosion resistance, high-temperature strength and good mechanical properties. Stainless steel can effectively resist the erosion of corrosive chemicals generated in the pyrolysis process, ensure the long-term stable operation of the equipment, and thus prolong the service life of the equipment.
The corrosion resistance of stainless steel effectively prevents further erosion of steel by corrosive substances. At the same time, the high-temperature strength of stainless steel ensures its stability in high-temperature environments, and will not be deformed or cracked due to high temperatures.
In the manufacture of waste plastic pyrolysis main furnace, the thickness selection of stainless steel is also crucial. Appropriate thickness can ensure the strength and corrosion resistance of the main furnace, while too thick material may lead to a decrease in heat conduction efficiency and affect the pyrolysis effect. Therefore, in the design and manufacturing process, it is necessary to select the appropriate stainless steel thickness according to the actual situation to ensure the performance and service life of the main furnace.
In general, the successful application of waste plastic pyrolysis technology is inseparable from the careful selection of equipment materials. With its excellent corrosion resistance, high-temperature strength and suitable thickness, stainless steel material provides a reliable guarantee for the main pyrolysis furnace of waste plastics.
From Baxter Environmental Protection: