Fractional distillation in fuel - aircraft maintenance , Other Engineering

Fractional distillation

This process is carried out in a fractionating column, which has a series of trays as shown in the figure. The effect of the superheated steam on the heated crude petroleum is to cause the lighter fractions to rise up the column. When rising, the vapour cools and a certain amount condenses on each tray until the tray is full of liquid to the overflow. Thus, each tray is a little cooler than the one below it, and therefore, lighter and lighter fractions will be present on each tray, as the vapours pass up the column. The temperature is controlled at the bottom of the column by the temperature of the crude oil, and at the top of the column by taking a certain amount of the product as it leaves, condensing it and pumping it back into the top of the column. This is known as the reflux.

A certain amount of material will condense, which has a lower boiling point than the bulk of the liquid on a particular tray. To enable separation of these fractions, the liquid from a selected tray is drawn into a smaller auxiliary column, called a ‘side-stripper'. Here it is treated with steam that causes the lightest fractions to vaporise and pass along with the steam into the main column.

118_Fractional Distillation in Fuel.png

The use of these side-strippers enables kerosene and gas oil to be obtained direct from the plant. Lubricating oil distillate, if such is present, can usually be drawn direct from a tray without the use of a side-stripper, while gasoline leaves the top of the column as a vapour and must be cooled to condense it to liquid gasoline.

 

 

Posted Date: 9/12/2012 2:36:44 AM | Location : United States







Related Discussions:- Fractional distillation in fuel - aircraft maintenance , Assignment Help, Ask Question on Fractional distillation in fuel - aircraft maintenance , Get Answer, Expert's Help, Fractional distillation in fuel - aircraft maintenance Discussions

Write discussion on Fractional distillation in fuel - aircraft maintenance
Your posts are moderated
Related Questions
Evacuation in a hospital - fire protection engineering: An evacuation in a hospital is very unlikely to require anyone to go outside. The buildings are split into numerous fir

I need a project in Load impact in power flow((constant power, constant impedance, constant current, induction motor). Report from 3 articles source and simulation in powerworld s

Guides for the fire risk assessment: In the UK, the Government produce guides for the FRA process that are free to download.   There are a range of guides covering  the ran

My question is that i am working in a petrochemical plant where in final stage disc ring reactor the barometric lag is chocked completely the system is under vacuum if i introduce

Means of escape: The means of escape can start at any point inside a building where there may be people.      The means of escape end when 'ultimate safety' is attained out

Fire precautions - fire protection engineering: Fire precautions include: Protecting escape routes in fire resisting construction, Providing fire doors between


main difference between warping and without warping

Defined risk management Give suitable examples of risk management Explain beifly

How do you calculate IRR