Basic Principles Of Separations
On board ship, there are major separation methods and it’s importants, which crews need to understand the basic principles behind them.
This article will point out three major purpose of separation, types of separation and give more explanation of the basic things to know before using any of the separating equipments.
The Purpose of separation
There are three major purpose of separations;
- Concentrate and separate solid particles from liquid
- To free a liquid of solids content
- Separating two mutually insoluble liquids with different densities, while taking a way any solid presents at the same time.
The above mentioned can be achieved by different ways. Following experience and experimental results, it’s given that we can achieve the above basic principles of separations by ;
- Centrifugal separation
This is mostly use on board ship, to separate fuel oil from water and/or sludge by rapidly rotation of the bowel, in such a way that the force of gravity is replaced by centrifugal force which is of thousands times greater.
- Gravity separations
We can also achieve separations of liquid mixture in stationary bowels ; eg. bunker tanks. This liquid get cleared slowly as the heavy particles in the liquid sink down wards to the bottom due to the influence of gravity. This particles can be remove by placing a drain below the bowel.
- Temperature Separations
Since on board ship and in general, we do have some liquid which requires change of temperature ( eg. Mineral oils), therefore high separating temperature increase such liquid capacity of separation. This type of separation can be divided into two base on there states
a) High and low viscosity
b) High and low density
Following the above explanations, on board ship was equipped with already modified purification system, which follows the above steps to help the operators in quick separation and easy operations. Instructions are also provided for the operators to follow to avoid injury due to high speed or temperatures.
To achieve the desired separations, you most follow the instructions of each manufacturers and safety guides.
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