3.1 fuel and lubricating oi treatment
3.1 fuel and lubricating oil treatment
3.1 fuel and lubricating oil treatment To ensure good combustion in diesel engines and reduce wear and corrosion in this type of engine it may be necessary to remove certain impurities from fuel and lubricating oils These include ash. various salts and water present in fuel oil and carbonaceous matter metals, acids and water present in used lubricating oil carbonaceous
3.1 fuel and lubricating oil treatment • To ensure good combustion in diesel engines and reduce wear and corrosion in this type of engine it may be necessary to remove certain impurities from fuel and lubricating oils. • These include ash, various salts and water present in fuel oil and carbonaceous matter, metals, acids and water present in used lubricating oil. carbonaceous
3.1 fuel and lubricating oil treatment When the impurities are heterogeneous i.e suspended solids or immiscible liquids, they can be removed reasonably successfully by one or more of a number of methods The main methods used at sea are centrifuging filtration and coalescing. Of these three methods centrifuging is the most widely used heterogeneous suspended immiscible coalescing
3.1 fuel and lubricating oil treatment • When the impurities are heterogeneous i.e. suspended solids or immiscible liquids, they can be removed reasonably successfully by one or more of a number of methods. • The main methods used at sea are centrifuging, filtration and coalescing. Of these three methods centrifuging is the most widely used. heterogeneous suspended immiscible coalescing
3.1 fuel and lubricating oil treatment 3.1.1 gravity separation formula It was shown in the section on oil/water separators how liquids with a specific gravity difference can be separated by gravity. The process was expressed mathematically as F_忑D(Po=P)g 6
3.1 fuel and lubricating oil treatment • 3.1.1 gravity separation formula ➢ It was shown in the section on oil/water separators how liquids with a specific gravity difference can be separated by gravity. The process was expressed mathematically as Fs D ( )g 6 3 = −
3.1 fuel and lubricating oil treatment 3.1.2 centrifugal force formula Cleary in a standing vessel the acceleration cannot be altered to enhance the separation force Fs, but by subjecting the operation to centrifugal force the above expression can be replaced by F=D(p。-P)Or where ◆0= angular velocity y=effective radius
3.1 fuel and lubricating oil treatment • 3.1.2 centrifugal force formula ➢Cleary in a standing vessel the acceleration cannot be altered to enhance the separation force Fs, but by subjecting the operation to centrifugal force the above expression can be replaced by where: = angular velocity = effective radius F D r s 3 2 ( ) 6 = −