NES Oil Recovery System
In simple terms the pre-treatment unit modifies the
viscosity and temperature of the sludge to render it to an optimized
condition for solids removal and oil recovery.
It does this by first removing large contaminates (bolts
stones etc) in the filter system and then raising the temperature in the
first mixer tank. The heated oil is then pumped into the blending and stabilization
tank for the addition of cutting stock and or chemical surfactants or
emulsion breakers as required.
Once blended the slurry is pumped to the centrifuge feed
tank ready for treatment and polymer injection at the decanter inlet.
The temperature is maintained at all times during the
operation and has gauges to monitor the operation. All mixers, pumps etc are
hydraulically powered and the unit is self contained with all pipe work
valves and controls integrally mounted.
Hydraulic power for this unit is supplied from a
hydraulic power pack.
The feed pump on the pre-treatment unit feeds the slurry
into the decanter inlet where it is separated into recovered oil , water and
The machine is adjusted to optimize the treatment and
operates on a continuous basis
The water is discharged through a weir tank fitted
in the unit to give a final polish to the water quality , and the solids are
conveyed to a skip for disposal.
The recovered oil is discharged from the decanter under
pressure and is piped to the clean oil holding tank for testing and load
The unit is self contained and has an inbuilt power pack
to drive the decanter skid.