Modification of Steam Stripper in DHDS Unit

Abstract

The present work investigates the hydro treating process of a diesel to achieve low Sulphur content. The
main objective for removal of Sulphur from diesel is that it contributes to increased level of air pollution and equipment
corrosion. The objective of this project emphasizes to maintain Sulphur level about 40ppm, to ensure flash point about
77oC and to ensure less Sulphur content by using copper corrosion test. The steam stripper is used for removal of
hydrogen sulphide and ammonia. During feed steam stripping, there is an addition of moisture or water in diesel hence it
is sent to salt dryer where rock salt is present which absorbs moisture content from diesel. Due to very high consumption
of rock salt we are using a reboiler instead of a rock salt dryer. As reboiler is not efficient for removal of moisture we
replace reboiler with vacuum drier