Abstract
We have been developing a recycling system for water-soluble coolant. The recycling system consists of two major steps; surfactant treatment process and activated carbon filtration process. To automate the recycling system, we tried to introduce two key technologies into the surfactant treatment process; a detection system for end of reaction and a fluid-type processing system. A reflection-type photoelectric sensor can detect the end point of reaction efficiently, because the reflection rate converges to a constant value once the reaction is terminated. The emulsified oil is separated smoothly from the coolant by adding a surfactant even in the fluid-type processing system as well as the case of mixing tank system.
