Displacement water :
Water, added to the separator bowl to displace the oil
and ensure there is reduced loss of oil at sludge discharge. Purifier : A separator that cleans the oil from water and sludge with continuous evacuating of separated water.
What is the purpose of operating water in purifier?
It’s function is
to convert the rotating energy of the liquid into a pressure head
. To prevent oil passing out of the water side on the start up , it is necessary to put water into the bowl until the water shows at the water discharge. The bowl of a purifier is in effect sealed by this water.
What is sealing water in purifier?
Why need sealing water ? To
seal the water outlet
& to prevent the overflow of oil from the water outlet.
What is overflow of oil in purifier?
Purifier overflow reasons:
Excessive sludge deposit inside the bowl
.
Sealing water low
.
Excessive back pressure
or service tank valve closed. Feed oil temperature high or low. Orifice plat installed wrongly in the inlet side.
What is backpressure in purifier?
A pressure downstream
(outlet side) of the filter that creates resistance to flow of liquid or gas
. This can result from closing a valve or entrapped air in a liquid system. This can also result from gradual blocking of the filter during use or to the resistance to flow caused by the filter itself.
Why back pressure is maintained in purifier?
Back Pressure: The back pressure should be adjusted after the purifier is started. The back pressure varies as the temperature, density, viscosity of feed oil inlet varies. The back pressure
ensures that the oil paring disc is immersed in the clean oil on the way of pumping
to the clean oil tank.
Why is the purifier bowl not closing?
Check the Level of Operating Water – If there is a separate operating water tank provided, check the water level in the same. If the operating water is not sufficient,
the purifier bowl will not lift
, resulting in the sludge ports remaining in the open position.
What is the principle of purifier?
The centrifugal purifier uses the principle of
density difference to separate water and other contaminants from oil mixture
. While the separating force of these mixtures under gravity separation is defined by formula Fs = ∏/6*D3*(ρw-ρo)*g.
What is blind disc in purifier?
Blind Disc means the disc is blind. It means there is no holes in the disc. It is
used to convert the purifier into clarifier
. It is inserted at the bottom of the disk stack, because there are no holes.
Why do we need interface in purifier?
Q. What Is Interface And Why It Is Important? Ans: The Interface Is
The Boundaries Of Layers Between The Separating Liquid And It Is Important To Maintain Inside The Bowl Of The Centrifugal Separator To Attain
The Effectiveness Of Purification.
What is difference between purifier and clarifier?
The key difference between purifier and clarifier is that
the purifier consists of a dam ring to create a line of separation between fuel and water
whereas the clarifier consists of a sealing ring to prevent the fuel tank from water and dissolved impurities.
Why are there holes in purifier discs?
A series of holes are aligned in each disk near the outside edge which permits the entry of dirty oil. – Due to
the difference in gravity and centrifugal force
, the heavier impure liquid (water) and particles move outside and lighter clean oil flows inwards and gets separated.
What is Alcap purifier?
ALCAP separators are
used for purifying oil of specific gravity more than 0.991
. When oil is fed into the system through the oil inlet, the separated water and sludge accumulate at the bowl periphery. The purified oil is discharged through the oil outlet. It operates similar to clarifier.
Why purifier RPM is not attaining its rated speed?
Reasons for the bowl speed low or purifier not getting the desired RPM are:
Belt is slipping (if belt drive) Worn out gear system
(if gear system) Bearing damaged.
What causes back pressure?
The back-pressure could be defined as the pressure within a system caused by
fluid friction or an induced resistance to flow through the system
. The necessary back-pressure is often created and controlled by a valve that is set to operate under the desired range of conditions.
What is gravity disc in purifier?
>Gravity disc in purifier is
the one which controls the output of the quality of the fuel
. >Dam ring is responsible for creating the interface between the oil and water. >Back pressure is maintain by gravity disc. Must Read:> Alarms And Shut Downs (Safeties) in Purifier. Purifier Gravity Disc Size Selection.
