| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a device for recovering oils from waste plastics which effectively removes deposits such as terephthalic acids or the like and improves the quality and the yield of low-boiling oils. SOLUTION: The subject device comprises a thermal cracking means 2 which thermally cracks waste plastics at about from 350 to 500 deg.C to yield a thermally cracked gaseous product, a first gas-liquid contacting means 57 which introduces the thermally cracked gaseous product into a gas-liquid contacting space and brings it into contact with an oil cooled to about from 200 to 300 deg.C to drain an oil having a boiling point at the above-mentioned temperature or higher and a crystallized material into a solid-liquid separation means 6 positioned below, and a low-boiling oil recovering means which cools the mixture of low- boiling components and low-boiling oils containing the low-boiling oils which passed through the first gas-liquid contacting means in a gaseous state to recover the low-boiling oils. The oils (high-boiling oils) accumulated in the solid-liquid separating means are returned to the thermal cracking means.</p> |
