| 摘要 |
<p>PURPOSE:To provide a treatment system wherein formation of dioxins can be suppressed, by incorporating therein a process for producing an oil through melt pyrolysis or carbonization pyrolysis of waste plastic and a process for high-temp. treatment above a specific temp. CONSTITUTION:Waste plastic 50 contg. an org. or inor. substance is fed into a pyrolysis oven 1 from a hopper 30 to melt and gasify only the org. substance. The resulting gas is fed via a piping 51 into a catalytic reaction oven 1, wherein it is converted into a low-boiling component, which is then cooled in a cooler 3 to obtain an org. substance as a liquefied fuel, which is then stored in an oil storage tank 4 for a while. The fuel is then passed through a piping 61, mixed with air 500, and fed into a combustion burner 11b of a high-temp. melting oven 5. Meanwhile, the non-liquefied gaseous org. substance is passed through a piping 55, mixed with air 500, and fed into a burner 11a. Dioxins in the gas and the oil are decomposed through combustion thereof with the burners 11a and 11b, and then discharged from an off-gas disposal apparatus. On the other hand, the inorg. substance from the pyrolysis oven 1 is heated together with other waste 100 contg. an inorg. substance and an org. substance in the oven 5 at 900 deg.C or above to be melted and turned into slug to thereby decrease the vol. of the waste. The slug is discharged out of the system.</p> |
