| 摘要 |
A method and an apparatus for treating wood treated with pentachlorophenol(PCP) as preservatives are provided to recycle treated wood by removing PCP from PCP treated wood for preservation from decay and insect proofing, reuse the recovered extracted solvent in solvent extraction by recovering an extracted solvent from a PCP extracted solution, and completely treat the PCP treated wood by recrystallizing or solidifying PCP extracted from the PCP treated wood. A method for treating wood treated with pentachlorophenol(PCP) comprises the processes of: (1) crushing the PCP treated wood into the form of chips or sawdust; (2) supplying an extraction solvent into the wood crushed into the form of chips or sawdust in the process(1), and repeatedly performing solvent extraction and centrifugation until concentration of PCP contained in the wood reaches a recycling standard value; and (3) distilling the PCP extracted solution obtained in the process(2) to separate extracted solvent and PCP residues, reusing the separated extracted solvent in the solvent extraction of the process(2), and drying and recrystallizing the PCP residues to recover PCP. The method further comprises the process of removing non-wood from the PCP treated wood using a metal separator between the process(1) and the process(2).
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