Page 29 - TECHNICAL SPECIFICATION FOR PALM OIL REFINING_rev.1 - Copy_Float

OFFER NO. KMIPL/P16E0097R7
100 TPD PHYSICAL REFINERY AND FRACTIONATION
Page No. 29/69

Thereafter, the oil is cooled in a controlled manner to the separation

temperature. During this step, super cooling occurs & results in nucleation and

crystal growth. After stabilization, the crystal & oil phases are separated by
filtration.

Before start –up the plant, the oil has to be kept in hot condition in order to
avoid settling of Stearine & to make sure that a homogeneous product is fed to

the plant. The temperature is usually 60 °to 65° C in order to melt the residual

crystals of the former cycle. In the crystallizer, the oil is cooled to its filtration
temperature following a well determined cooling which ensures the formation of

good crystals. Thanks to a simple thermostatic control of the cooling water & to

uniform oil cooling, Crystallization is carried out without undesirable
temperature increase.

The crystallized oil is pumped out of the crystallizers to the membrane filter

press by slow rotating volumetric pump. The crystallized oil is fed into all

chambers & the olein flows through a fine filter cloth covering each frame. The
cake left in the chamber between two recessed filter frames is squeezed between

the two opposite frames by progressive air / oil pressure applied on the back of

the frames. After squeezing the cakes, the pressure is released and the press is
opened to allow cake discharge. This all operations will be carried out

automatically.

During the filtration & squeezing steps, the liquid oil flows through the filter

cloth to the oleine collecting tank. From there it is pumped out to the main
storage tanks. The cake remaining in the filter after squeezing is discharged by

gravity to the Stearine tank, which is located under the filter press. The steam

coil & circulation system is provided to melt the Stearine. The high & low level
Indicator provided to check level. Once high level is attained the Stearine is

transferred to the Stearine storage tank.