check the direction of rotation of the seperator, by just starting and stopping the purifier motor.
Also ensure the sight glass is in vertical position, as there is a common mistake of fixing it in horizontal position. Ensure that it is exactly half in the sight glass. If the Purifier is started after a overhaul, then check all fittings are fiited in right manner. Pre-checks before starting a Purifier…! Before starting a Purifier, following checks are very essential: 1. In order to optimize the purification, the throughput must be minimum. Throughput of oil feed: Throughput means the quantity of oil pumped into the purifier/hr. 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. The back pressure varies as the temperature, density, viscosity of feed oil inlet varies.
Back Pressure: The back pressure should be adjusted after the purifier is started. R.P.M of the rotating bowl: If the purifier has not achieved full rpm(revolutions per second), then the centrifugal force will not be sufficient enough to aid the seperation. The lower the density, better the seperation. Density of Oil: As the dirty oil entering the purifier is heated to reduce the viscosity, the density also reduces. The lower the viscosity, the better will be the purification.
Feed inlet oil temperature: Before entering the purifier, the dirty oil passes through the heater, which increases the temperature, thus reducing the viscosity of the oil to be purified. Out of those parameters, very important parameters are… 1. But in order to optimize the purification process, certain parameters should be adjusted before purifier is started. The Purifier operates on the principle of seperation by centrifugal force. Other type is a Purifier, which seperates liquids of different density. One is Clarifier, which seperates solids from liquids.
We all know that centrifuges are an important type of auxiliary equipment on board ships and that they are classified into two operating functions. We have already know about the basic principle of operation of purifiers…! Lets know how to start and stop purifiers., necessary safety precautions before starting, de-sludging procedure, and emergency stopping….etc….! Recap…!
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