| 摘要 |
PROBLEM TO BE SOLVED: To efficiently and inexpensively separate sludge from a coolant.SOLUTION: A coolant cleaning device 10 includes a first tank 21 in which a coolant is stored, and sludge staying in the coolant is separated from the coolant; a microbubble generation device 23 which generates microbubbles for attracting the sludge staying in the coolant and floating the sludge to a coolant liquid surface in the first tank 21; a first tank recovery device 31 which recovers the residual sludge in the vicinity of the coolant liquid surface filtered in the first tank 21 together with the coolant; and a filter device 41 which removes the residual sludge from the coolant recovered by the first tank recovery device 31 and returns the separated coolant into the first tank 21. |
