| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a vacuum heat-treatment apparatus capable of solving problems arising upon treating waste contaminated with a halogenated organic compound such as PCB by a combination of a cleaning treatment using an organic solvent and a vacuum heat-treatment. <P>SOLUTION: The vacuum heat-treatment apparatus for treating contaminated waste having been roughly cleaned using an organic solvent is comprised of a back-flow prevention tank disposed in an exhaust flow path that connects a vacuum heating furnace and an oil scrubber with one end of an exhaust inflow pipe disposed in the upper part of the tank and one end of an exhaust outflow pipe disposed in the bottom part of the tank. By virtue of the above structure, the cleaning oil can be prevented from flowing back to the vacuum heating furnace even if it is made to bubble and to flow backward in the exhaust flow path by a large amount of the vaporized organic solvent flowing from the vacuum heating furnace into the oil scrubber. In addition, the cleaning oil that has flowed backward can be spontaneously recovered into the oil scrubber. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
