Forms and products of thermal cracking of waste plastics
Why Thermal Cracking of Waste Plastics
Thermal cracking of waste plastics is the most efficient and environmentally friendly way to solve the pollution problem of waste plastics compared with traditional landfill and incineration, which can realize the waste plastics treatment process without toxic gas leakage and pollution, and can bring higher economic benefits.
Thermal cracking method is to achieve the decomposition of plastic molecules by heating the plastic at high temperature and utilizing the heat energy to destroy the chemical bonds in the polymer, and the decomposed products include cocoa gas, cocoa oil, carbon black, and so on. Due to the nature and material form of some plastics, they cannot participate in hydrolysis and physical recycling, but the plastics can all be heated at high temperatures to make them crack, so thermal cracking is a very important plastics treatment method. In addition, the high flexibility of thermal cracking of plastics to handle highly contaminated plastics and highly heterogeneous plastics is also one of the advantages of the thermal cracking method.
For the thermal cracking treatment of waste plastics, various manufacturers of waste plastics refining equipment have specified the content of PVC (polyvinyl chloride) and PET (polyterephthalic acid plastics) in the raw material restriction conditions, this is because during the heating process of PVC material, the Cl ions will be separated, and further HCl will be generated, which will seriously corrode the cracking equipments, and shorten the service life of the equipments.The PET material, in the PET material will generate oxygen under the action of high temperature, and the cracking process should strictly ensure that the reactor is in an oxygen-free or oxygen-deficient state, otherwise it will burn or explode, causing danger.
In the process of thermal cracking of mixed plastics, due to the different components, the degree of cracking reaction may be affected, and the composition and proportion of cracking gas and cracking oil produced may be different, for example, when the content of PET in the mixed plastics is high, the output rate of oil will be reduced, and the proportion of cracking gas will be increased; when the content of PE is high, the proportion of cracking gas will be increased again, and the composition of the cracking gas will also be changed.
Jiangsu Kelinyuan Clean Energy Technology Co.o.,Ltd specializes in the purification of waste plastic cracking gas and power generation business, thank you for your readers' support and attention!
