MILL DESIGN - CLARIFICATION STATION

Key points to consider for design of clarification station ;

CRUDE OIL TANK

• diluted crude oil - 65% to 75% to FFB
• diluted crude oil retention time - 15 minute
• temperature - 95C
• safety factor - 1.2

OIL CLARIFIER TANK

• temperature - 95C
• stirrer speed - 3 rpm
• retention time - 5 hour
• @
• retention time in Oil Vertical Clarifier Tank based on ;
• content ex-screw press : oil - 55% ; water - 35% ; nos - 10%
• dilution water to oil ratio - 1 : 1
• @
• oil characteristic
• 90% > 60 micron
• 10% < 60 micron
• 1 micron - 1 / 1000 mm
• velocity of rise - 125 micron / sec

PURE OIL TANK

• oil percentage to crude oil - 40% (pure oil percentage from diluted crude oil)
• crude pure oil percentage to FFB - 65%

OIL PURIFIER

• crude oil to FFB - 65%
• oil to crude oil - 40%
• specific density oil - 0.89

SLUDGE TANK

• underflow sludge to FFB - 45%
• sludge tank safety factor - 1.2

SLUDGE SEPARATOR

• sludge produce (underflow) - 45% to FFB
• 1.9 mm nozzle - 6000 lit/hr
• 1.7 mm nozzle - 5000 lit/hr

Source - Masrawana Mohd. Masran's Collection