FREYLIT Mobil Oil Separator

FREYLIT tramp oil separators for extending the lifetime of coolants and degreasing baths:
The FREYLIT tramp oil separator is a fully automated oil separator which removes tramp oil from metal working coolants and greasing baths. Tramp Oil degrades the quality of the coolant and therefore needs to be removed frequently on order to extent the lifetime of the coolant, while preserving its working properties. The FREYLIT tramp oil separator will extrend the lifetime of the coolant manifold and therefore allows significant cost reductions to the operator:

• saving in purchasing new coolant and
• saving in dispsal costs of used coolant.

Coolants are stored either in sump tanks of each individual machine with a capacity of 200 - 500 litres or the factory has central sump tank(s) with a volume of serveral thousand litres, where the coolant is collected from serveral machines. FREYLIT has different sizes of oil separators to cover all ranges of sump tank volumes.

Process description

Oily water is transferred by positive displacement pump (screw pump or diaphragm pump) to the oil separator. The heart of the oil separator are the FREYLIT coalescent plate packs. The oily water flows through the plate pack of the separator.
Horizontal, olephilous, non-rottable corrugated plates of polypropylene are used to separate the residual oil. The corrugated plates are stacked on top of each other at a distance of 6 mm (¼"), by means of cast-on spacers. Accordingly, an oil droplet only needs to move upwards by a maximum of 6 mm (¼"), before it contacts the next corrugated plate, wich traps the droplet.

As soon as an oil droplet toches a corrugated plate it is separated. The droplet adheres to the underside of the corrugated plate and on account of its specific gravity, it moves along the plate to the apex of the corrugated ridge.

Bore holes in the apices of the corrugated ridges (diameter 12 mm (½")) allow the oil collected in the apices of the ridges to move upward an reach the oil collection layer. Due to the fact the corrugated plates, which are tapered at the corrugated ridges, are stacked in top of each other, the oil-containing water moves along the corrugated plates at varying speed. This results in additional particle collisions (possibility to coalesce) of bigger an smaller oil droplets. The droplets become bigger on account of these particle collisions, which accelerate their upward movement, so that they are consequently trapped by the corrugated plates. The plates have a length of 590 mm (2').