Regarding desalter
Regarding desalter
(OP)
Hi,
i work in crude distillation unit.the problem that we are facing in our plant is even having the salt content @ desalter outlet at around 0.5 ptb we are getting chloride around 70 ppm in the column overhead.can u suggest me some ideas?
i work in crude distillation unit.the problem that we are facing in our plant is even having the salt content @ desalter outlet at around 0.5 ptb we are getting chloride around 70 ppm in the column overhead.can u suggest me some ideas?





RE: Regarding desalter
There may be other generative sources sources of chlorine in (stream reactions) the crude that are not being removed. Etc. If you could give more information I think people might be able to suggest more detailed answers. But give what you said, it is hard to go much further and be specific.
RE: Regarding desalter
We are using stripped sourwater to spray on the tube side of the overhead exchangers.Today i have sent the sample to check chlorine in it,Apart from this there is no possibility as steam we are using has no chlorine content.
Can u guide me by giving some datas to find chlorine from the corrosion probe(corrosion rate) which is inserted on the column overhead
one day while processing Sour crude it shows around 30 miles per year
while processing sweet it shows around 10 miles per year
wat we can predict o seeing the probe value?
RE: Regarding desalter
If you have side strippers on the CC that are using clean steam, and you have a closed loop on your reboiler and condenser, then your chlorine is coming in at the feed and accumulating. Check the upstream units to see if the makeup water has chlorine in it. Hope this helps.
RE: Regarding desalter
I had that happen to me in the early nineties. My salt out of the desalter was fine , by test, but my OH chlorides were high. Unknown to me some slop oil with some cleaners was being added. Once we moved that to the coker, everything went back to normal.