| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for removing residue in liquefaction treatment facility for waste plastic material, capable of improving recovery ratio of oil such as light oil without discharging excess oil to the solid material side. SOLUTION: When carbon residue concentration in thermally cracked oil generated in a thermal cracking furnace 11 is low, only heat treatment of thermally cracked oil is carried out by a thermal cracking oil-circulating heating furnace 12 and when carbon residue concentration in the thermally cracked oil is high, heat treatment of thermally cracked oil is carried out by the thermally cracked oil circulating heating furnace 12 and removal treatment of carbon residue from a thermally cracked oil is carried out by a solid-liquid separation apparatus 18. |
