| 摘要 |
<p>PCT No. PCT/EP93/01646 Sec. 371 Date Dec. 30, 1994 Sec. 102(e) Date Dec. 30, 1994 PCT Filed Jun. 25, 1993 PCT Pub. No. WO94/00282 PCT Pub. Date Jan. 6, 1994.A plant for the separation at high temperatures of contaminants from plastic material in small pieces or in leaves, including at least one stage (2) for the separation of contaminants, which in turn includes a centrifugal separator device designed to separate an input flow of plastic material in small pieces or in leaves, with contaminants and a conveying fluid comprising water and steam, into a main flow of the material and the conveying fluid and into a secondary flow of the contaminants and the conveying fluid. The separation stage includes, moreover, a cyclone designed to receive in input the secondary flow and to divide it into a discharge flow of the contaminants and water and into a flow of steam which is conveyed towards the inlet of the separation device of the same stage and/or of the previous stages. A final cyclone (3) is preferably provided, connected in cascade to all the possible stages of separation of the plant to receive in input the main flow in output at the final stage and separate it, in turn, into a flow of material and water conveyed to the outside of the plant, and into a flow of steam conveyed towards the inlet of the separation device of at least one of the stages which precede it.</p> |
