Page 4 - TECHNICAL SPECIFICATION FOR PALM OIL REFINING_rev.1 - Copy_Float

OFFER NO. KMIPL/P16E0097R7
100 TPD PHYSICAL REFINERY AND FRACTIONATION
Page No. 4/69

A. Process Description

Pretreatment for Palm oil:

Crude Palm oil is heated to 70 – 80 deg C by hot oil in economizer or by steam
in feed heater (only at startup). The oil is then pumped to the mixer where it is

mixed with calculated quantity of phosphoric acid solution. This mixture is

delivered in conditioning reactor to give sufficient retention time. The Pretreated
Palm oil is then transferred to bleaching section.

Bleaching:

Pretreated oil and bleaching earth, which is proportioned by the Earth Feeder,

are mixed in the Bleacher. In Bleacher the earth adsorbs residual gums, soap,
pro-oxidants, color pigments and other impurities not removed by washing. The

Bleacher has multiple agitated compartments and operates under vacuum to

ensure adequate residence time and complete moisture and air removal. The
Bleacher Discharge Pump pumps the dry oil and earth mixture through a clean

Adsorbent Filter where the spent earth is removed. The Bleached Oil Pump
pumps the filtered oil collected in the Receiver to deo section through a

Bleached Oil Polish Filter.

Filter Management: Filter Management: The standard bleaching system is

based on the use of two filters of which one is on line while the other is being

cleaned and prepared for the next cycle. When a filter has reached its maximum
capacity, as indicated by high feed pressure, it is taken off line for cleaning and

replaced by the other filter.

The cleaning procedure begins by first pressurizing the filter with steam to expel
residual oil into the Recovered Oil Tank and dry the spent filter cake. The oil

recovered from the filter cake is collected in the tank and can usually be

recycled to the Bleacher. After drying, a bottom discharge valve on the filter is
opened and the leaves pneumatically vibrated so that the spent cake is