COLD INSULATION MATERIAL REMOVAL METHOD AND COLD INSULATION MATERIAL REMOVAL SYSTEM

To provide a cold insulation material removal method and a cold insulation material removal system that can remove the powdered cold insulation material filled in the cold insulation space of a low-temperature tank more reliably.SOLUTION: A cold insulation material removal method includes a process of suctioning an upper cold insulation material in which a suction hose 10 is inserted into the upper opening OU opened in the outer tank side plate 122 to suction and remove powdered perlite 131 in a side cold insulation space SS, a process of measuring the deposition state of an upper cold insulation material in which the deposition state of the powdered perlite 131 is measured through the upper opening OU, a process of forming a lower opening OL1 in the outer tank side plate 122 according to the accumulation state measured by the process of measuring the accumulation state of the upper coolant, and a process of suctioning the lower coolant by inserting the suction hose 10 into the lower opening OL1 and suctioning off the powdered perlite 131.SELECTED DRAWING: Figure 2 【課題】低温タンクの保冷空間に充填された粉状の保冷材をより確実に除去することが可能な保冷材除去方法および保冷材除去システムの提供。【解決手段】保冷材除去方法は、外槽側板１２２に開口された上部開口部ＯＵに吸引ホース１０を挿入して側部保冷空間ＳＳ内の粉状パーライト１３１を吸引除去する上部保冷材吸引工程と、上部開口部ＯＵを通じて粉状パーライト１３１の堆積状態を測定する上部保冷材堆積状態測定工程と、上部保冷材堆積状態測定工程をおこなうことにより測定された堆積状態に応じて、外槽側板１２２に下方開口部ＯＬ１を形成する下方開口部形成工程と、下方開口部ＯＬ１に吸引ホース１０を挿入して粉状パーライト１３１を吸引除去する下方保冷材吸引工程と、を含んでいる。【選択図】図２