Used cooling lubricants

Mineral or synthetic oil, emulsifiers, stabilisers, anti-foaming substances, additive

Cooling lubricants, as well as drilling and cutting emulsions have to be exchanged due to aging or high impurities. As emulsions have a water content of 90 - 97%, the vacuum distillation is an economic alternative for treating the used emulsion. The resultant distillate can be reused to mix new emulsion. The highly concentrated residue can, depending on the oil content, be burnt or disposed of in the previous way. When planning the unit the impurity grade of the emulsion is to be tested to see if the VACUDEST® unit can be made more profitable by adding a skimmer for the separation of free oils and/or a belt filter for the filtering of oiled particles. If a high distillate quality is required, a membrane filtration or active carbon can be added for the further reduction of the residual hydrocarbon content.

Water recycling and the reduction of fresh water consumption is made equally possible by the treatment of used emulsions. The VACUDEST® vacuum distillation system enables the waste disposal costs to be significantly reduced and the distillate can be reused, in contrast to conventional treatment technology (e.g. separation units).