Salt deposition problem in distillation columns
Thread Content
Can salt accumulation in the fractionation tower be determined by analyzing the chloride ion content in the top circulation oil? What is the indicator? What other parameter indicators are there to use for judgment? I kindly ask for the guidance of all teachers
http://bbs.hcbbs.com/search.php?mod=forum&searchid=4196&orderby=lastpost&ascdesc=desc&searchsubmit=yes&kw=%B7%D6%C1%F3%CB%FE%BD%E1%D1%CE Topics related to salt formation in distillation towers – you can take a look! Also, learn to use the forum’s search function to avoid posting the same or similar topics repeatedly!
To assess the situation: the pressure drop in the distillation tower increases, the chloride concentration in the sulfur-containing wastewater rises, and in severe cases the top circulation pump becomes vacuumed, preventing diesel from being pumped out. The crude gasoline and diesel do not meet the requirements regarding their dry point.
Treatment: Increase the capacity limit to allow cold reflux water to flow in, and use water to wash the trays where salts have accumulated.
Treatment: Low-pressure deoxygenated water can be injected into the top circulation system
The tower operation is unstable, with large fluctuations; as a result, the diesel yield decreases, and the dry points of both diesel and gasoline rise.