1. Mechanical recycling method
Stripping separation: First, the different parts of the PVC insulated flexible cable can be separated by mechanical means. This method can effectively recycle metal conductors such as copper, because copper has a higher economic value. For some thicker cables, manual peeling is also a feasible way, but the efficiency is relatively low.
Crushing treatment: After separating the metal conductors, the PVC material can be crushed. The crushed PVC particles can be used in some fields where the material performance requirements are not high.
2. Chemical recycling method
Pyrolysis treatment: PVC insulated flexible cables can be recycled by pyrolysis. In an oxygen-free or oxygen-deficient environment, PVC materials decompose at high temperatures to produce hydrogen chloride gas and hydrocarbon compounds. Hydrogen chloride gas can be recycled for the production of chemical products such as hydrochloric acid. Hydrocarbon compounds can be further processed into oil products or as chemical raw materials. The temperature and time of pyrolysis are key factors. The general temperature is around 300-500℃, and the time depends on the specific composition and processing volume of the cable.
Solvent extraction: PVC is extracted from the cable using a specific solvent. For example, some organic solvents can dissolve PVC and separate it from other components. Then the solvent is recycled and reused by distillation and other methods, and pure PVC raw materials are obtained at the same time. However, this method requires the selection of suitable solvents, and the toxicity of the solvents and the cost of recycling must be considered.
3. Energy recovery method
Incineration power generation: If PVC insulated flexible cables cannot be effectively recycled, incineration is a way of energy recovery that can be considered. During the incineration process, the energy in the PVC material can be converted into heat energy for power generation. However, since PVC combustion produces harmful gases such as hydrogen chloride and dioxins, it is necessary to equip it with an advanced waste gas treatment system to reduce environmental pollution. In some developed countries, there are strict incineration emission standards to ensure environmental protection while recovering energy.
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