47

ANNEX B

DESIGNS OF OIL-WATER SEPARATORS

Figure A.2.1: Schematic diagram of 3 chamber type separator

Chamber 1 Chamber 2 Chamber 3

Ground level

Outlet valveInlet valve

Normal liquid levelConcrete

Inlet

Section on 'A-A'

Outlet

Plan

'A' 'A'

3 Chamber separator

ENVIRONMENTAL GUIDELINES FOR PETROLEUM DISTRIBUTION INSTALLATIONS

48

Figure A.2.2: Schematic diagram of API type separator

Skim pipeFlow spread barsInlet valveGround level Outfall weir Outlet valve

Concrete

Silt pits

Liquid level

Intermediate baffle

Final oil retention baffle

Section on 'A-A'

Plan

Skimmed oil sump

Outlet

Skim pipe

Pump

Inlet'A' 'A'

A.P.I. Separator

Inlet manifold

ANNEX B

49

Figure A.2.3: Schematic diagram of tilted plate type separator

Skim pipe

Inlet valve

Ground levelOutlet weir

Concrete

Silt pit

Normalliquidlevel

Plate pack

Trashscreen

Flowspread

bars

Oil

Waterflow

Sludge chamber

Section on 'A-A'

'A' 'A'

Recovered oil sump

Inlet

Outlet

Trash screen Plate pack

Plan

Tilted plate separator