DEPOIL PC 20A/40A/50A/70A
TANGENTIAL FLOW PREFABRICATED OIL SEPARATORS/SAND REMOVAL SYSTEMS
PATENTED BY DEPURECO SPA as for UTILITY MODEL REGISTRATION NR 0000280561
DEPOIL PC plants are manufactured in compliance with both UNI 858-1-2 regulations and API standards.
DEPOIL PC plants are two kinds:
- Tangential flow centrifugal plants DEPOIL PC 20A/40A/50A/70A, suitable to sand removal and oil separation up to 70 Lt/sec flow rate
- Tangential flow coalescing plants DEPOIL PC 100A/200A, suitable to sand removal and oil separation up to 250 Lt/sec flow rate
The plant consists in a reinforced concrete tank, manufactured and tested according to DEPURECO’s patented project.
The room inside the tank is conveniently arranged in order to enforce such a specific hydrodynamic behavior on the flow that facilitates the heavy particles sedimentation (sand removal) on the one hand, and the light ones flotation (oil separation) on the other hand.
The initial screening system can be arranged by installing a prefabricated catch basin with inserted manually removable grating and filter basket. The plant structure is composed of an underground prefabricated monobloc facility made of FeB 44 k steel and C28/35 strength class vibrated reinforced concrete. It is provide with carriageable cover, D400 cast iron manhole covers and PVC joints. The particular layout makes it suitable to be integrated into the sanitary sewers due to the minimal gap between the heights of the respective inlet pipes.
Centrifugal systems are arranged in a cylindrical-conical tank. The flow is tangentially led inside the tank in order to trigger a circular motion of the water: under both the centrifugal force and the slowing down action of the tank walls, the sand drops to the tank bottom since it is heavier and bigger than the floating solids, while the oily particles get entrapped on the water surface of the circular duct.
The sand deposit on the tank bottom is periodically extracted. From an engineering point of view, the plant can be broken down by three compartments. The first one is that one where sand and oil separate due to the tangential flow and where oils get entrapped on the surface. The second compartment is for collecting the sedimented sand. The third one is a turbulence-free compartment where the water takes on an ascending velocity that prevents the sand sedimented on the tank bottom from being dragged along. The linear development of the particles helicoidally descending trajectory inside the tank matches the length of a channel oil separator/sand removal equipment, although DEPOIL PC takes up less space