Heli-Sep Oily water Separator

MARINESHELF publishes articles contributed by seafarers and other marine related sites solely for the benefit of seafarers .All copyright materials are owned by its respective authors or publishers.

The plant must first be filled with clean water before operation. As the oil enters the vessel it flows through the first stage coalescer where larger oil droplets are formed. These droplets eventually float to the top. This separation is aided by the change in direction as the flow moves to the second stage.

The second stage coagulator completes the separation by attracting the oil to the surface of the oleophilic beads. The second stage is cleaned by back-flushing with clean water.

The separated oil is collected at the top of the chamber and when the predetermined level is reached the discharge pump stops. At the same time the back-flush valve and oil outlet valve open. The collected oil is removed at the same time that the coagulator is cleaned. Similarly if air is drawn into the system the back-flush will be initiated.

This separator is able to reduce the oil content of the discharge to below 15ppm. The quality of the discharge can be increased by the use of a filter.

As the pump is situated after the separation then there is no restriction on the type of pump that may be used although it will be a positive displacement type.