Palm oil

Huading Separator have a product range for the palm oil mill that concentrates on equipment for the oil room. Not only the palm oil separator, but also palm oil decanter centrifuge.
The product we are marketing are:

Nozzle separator
Decanter centrifuge
Palm oil purifier

Process with nozzle separator


Process with decanter centrifuge


Nozzle separator

The PAND nozzle separator is used for recovery of palm oil from the settling tank underflow in a palm oil mill. This underflow is commonly called sludge water. PAND nozzle palm oil separator is sometimes installed to recover oil from the heavy phase of a three-phase decanter. The decanter has removed most of the oil and there is very little left for the PAND nozzle palm oil separator. The main task is to recover the oil in the third layer. The requested separation duty here is to separate between water and water with some oil containing suspended solids.
Separation is performed in a rotating bowl containing conical discs, where in the space between each disc the actual separation takes place. The liquid feed enters the bowl through a stationary feed pipe into a rotating distributor insert in the center of the bowl and then passes into the disc stack. Solids are continuously discharged through the peripheral nozzles. The nozzles discharge leaves the machine by gravity via an outlet in the frame. Water are forced towards the bowl wall where they are discharged under pressure through the centripetal pump. The concentrated oil is pumped out by a built-in centripetal pump as well. Should the oil and water content in the bowl move outwards, with the risk of oil being ejected together with the solids, water from the overhead balance tank will automatically enter the bowl and push the oil level back to the normal position.
By removing the nozzle holders from the outside and flushing the bowl with water while running at low speed the PAND nozzle separator can be cleaned without dismantling. In this way, machine down-time is reduced to a minimum.
In addition, the PAND nozzle palm oil separator comes with a CIP program. Flushing water is initially introduced into the feed inlet tube when the centrifuge is running at low speed over a few cycles to be followed later by introducing the flushing water into the clarified light phase (recovered oil) outlet through the disc stack when it is running at higher speed.
All liquid-wetted parts are of stainless steel. The frame is made of cast iron except the top part & frame hood which are of stainless steel. As a protection against erosion, the PAND palm oil separator contains several erosion guards and liners.


Decanter centrifuge
PAWT series decanter centrifuge separates the underflow of the main settling tank (CST) into oil, sludge water and solid cake in its 3-phase operation

Separation takes place in a horizontal conical-cylindrical bowl equipped with a screw conveyor. The palm oil sludge is fed into the bowl through a stationary inlet tube and smoothly accelerated by a specially designed inlet distributor. Centrifugal force causes instant sedimentation of the solids on the wall of the bowl, and a layer-wise separation of heavy (water) and light (oil) liquids. The conveyor, rotating in the same direction as the bowl, but at a different speed, conveys the solids to the conical end. Here the solids are lifted clear of the liquid and centrifugally dewatered before being discharged into the collecting vessel. The clarified liquids overflow into the casing through openings in the cylindrical end of the bowl. Both phases leave the collecting compartments in the hood by gravity flow through outlets under the machine.

The initial introduction of decanter centrifuge in the palm oil mill industry encountered only a small measure of success. This was due to the high wear and tear on the decanter conveyor due to the presence of abrasive particles (mainly sand) in the crude palm oil. Huading Separator continued to work to improve the wear resistance throughout the years. Huading Separator then developed the riveting of the tungsten carbide tiles to the conveyor. The riveted tungsten carbide tile design improved the lifetime of the conveyor dramatically.


Oil purifier
The palm oil Purifier is widely used for the purification of palm oil. The oil is fed from the oil tank to the purifier where impurities and water are removed. After purification the oil passes to the vacuum dryer, and is finally pumped to the main storage tank via an oil cooler.

The PASB purifier is a solids ejecting disc stack type centrifuge. The rotating bowl is driven by the electric motor via the flat belt or gear worm. With the feed closed, oil is displaced from the bowl by the addition of displacement water and discharge water is added to release the hydraulic closing force, lowering the sliding bowl bottom. After the discharge cycle, a new water seal is established in the bowl and separation continues. Oil is fed into the purifier by using an external pump. The operating water slide and the complete hydraulic system controlling the sludge discharges are inside the bowl. There is no possibility of contamination from external sources.

The separator bowl is designed for partial discharge of separated sludge, which means that there is a minimal loss of oil. The drive system is of belt drive, or the worm and worm wheel.
The feed system is via external pump system. No operating water tank is required as the purifier requires water at high pressure and this is achieved by an external water pump which operates only during the discharge cycle. Discharging have to be made at regular interval of 15 to 20 minutes and each discharge cycle last for a period of several seconds. The discharge system is fully automated with manual override system.