| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a practical removal method for sludge precipitating in a vacuum distillation tank for removing water in PCB mixed-in insulating oil. <P>SOLUTION: According to this removal method for sludge, the PCB mixed-in insulating oil is taken as oil to be processed, and prior to de-toxifying the oil to be processed using metallic sodium, sludge is precipitated in the vacuum distillation tank for removing water contained in the oil to be processed. The sludge is water soluble sludge which is precipitated when water is removed from the PCB mixed-in insulating oil containing oil oxidized alteration material, and the sludge is dissolved and removed by water. In this case, the oil to be processed is taken as a washer and the water contained in the oil to be processed can be used as a detergent. Thereby, the sludge can be simply dissolved and removed. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
