PCB REMOVAL METHOD AND PCB REMOVAL DEVICE

• Main Authors: NOGUCHI GIICHI, YAMASHITA MASAYOSHI, KUROSAWA JUN, SUZUKI SHUNJI, FUKANO HIROKAZU, OKI HIROKI, SHINODA KAZUHIRO, KATAGIRI AKIRA
• Format: Patent
• Language: English; Japanese
• Published: 08.08.2016
• Subjects: ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; CANDLES; CHEMISTRY; CLEANING; CLEANING IN GENERAL; DETERGENT COMPOSITIONS; DETERGENTS; FATTY ACIDS THEREFROM; METALLURGY; PERFORMING OPERATIONS; PREVENTION OF FOULING IN GENERAL; RECOVERY OF GLYCEROL; RESIN SOAPS; SOAP OR SOAP-MAKING; TRANSPORTING; USE OF SINGLE SUBSTANCES AS DETERGENTS

PROBLEM TO BE SOLVED: To provide a PCB removal method for safely and efficiently removing PCB from a container contaminated with PCB.SOLUTION: A PCB removal method for removing PCB from a container 1 is mainly constituted by: a solvent cleaning step where a solvent capable of dissolving PCB is supplied to the bottom 11 of the container 1 and the PCB is dissolved and discharged; and an aqueous solution cleaning step where an aqueous solution added with a surfactant is jetted to the inner surface of the container 1 after the solvent cleaning step and the PCB is discharged. In the solvent cleaning step, PCB oil is discharged before supplying the solvent when the PCB oil is accumulated on the bottom 11 of the container 1 and the solvent is supplied until a height reaches the height of the PCB accumulated on the bottom 11 of the container 1 or higher.SELECTED DRAWING: Figure 1 【課題】 ＰＣＢに汚染された容器からＰＣＢを安全かつ効率的に除去するためのＰＣＢ除去方法を提供すること。【解決手段】 容器１からＰＣＢを除去するＰＣＢ除去方法であって、容器１の底部11に、ＰＣＢを溶解可能な溶剤を供給し、ＰＣＢを溶解させて排出する溶剤洗浄工程と、溶剤洗浄工程の後に、界面活性剤を添加した水溶液を容器１の内面に噴出し、ＰＣＢを排出する水溶液洗浄工程と、で主に構成される。溶剤洗浄工程は、容器１の底部11にＰＣＢ油が溜まっている場合には、溶剤を供給する前に当該ＰＣＢ油を排出する。そして、溶剤洗浄工程では、溶剤を容器１の底部11に予め溜まっていたＰＣＢの高さ以上になるまで供給する。【選択図】 図１