The invention belongs to the technical field of
waste treatment, and provides a waste plastic resource
conversion method based on spectral frequency division utilization, which comprises the steps of
new energy waste plastic collection,
new energy waste plastic pretreatment, full-
wave band energy distribution, catalyst setting, photocatalytic treatment, pyrolytic reaction treatment and gas-liquid-
solid product conversion. According to the method disclosed by the invention, a high-crosslinking structure and selective
bond breaking in the plastic are destroyed through
ultraviolet light catalytic pre-degradation, so that the subsequent
pyrolysis temperature is reduced to 600 DEG C from 800 DEG C, the
energy consumption is reduced, and the release of HF or HBr in the
pyrolysis process is avoided; through photo-thermal synergistic regulation and control, the conversion rate of gas-liquid-
solid products is increased; and through spectrum frequency division, the energy
utilization rate is increased to be greater than or equal to 75% from 30% of single
photocatalysis, and the treatment cost is reduced.