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Can you please advice what type of corrosion inhibitor, biocide, antifoulant and polyelectrolyte polymer can be used in Desalter effluent?
 
Answers
05/07/2011 A: Terry Ross, Maintenance Products Australia, terry@maintenance.net.au
We have had success with merus rings to solve various problems including biofouling and corrosion. The ring is fitted to feed pipe. For info: www.merusaustralia.com.au
16/05/2011 A: Sudhakara Babu Marpudi, Oman Refineries and Petroleum Industries Company, m_sudhakarababu@yahoo.com
Quality of Desalter effluent Brine (pH, Oil content) is very important as brine joins the inlet streams of Waste water treatment. Brine pH could be lower while processing opportunity crudes. In such cases to protect the brine piping from the Desalter to WWTF corrosion inhibitors (simple pH boosters) shall be used. However, before dosing any chemical in Desalter effluent brine impact on the downstream sections must be thoroughly validated.
18/11/2010 A: Berthold Otzisk, Kurita Europe GmbH, Berthold.Otzisk@kurita.eu
A chemical injection into the desalter effluent is not very common. Sometimes a cationic charged polymer is dosed into the desalter effluent to separate oil from the water at the API.
Beside the injection of emulsion breakers it is more common to inject metals removal additives and corrosion inhibitors into the wash water in front of the desalter. In that case the effluent water will contain most of these metals. Antifoulants like asphaltene dispersants are often dosed into the crude oil after electrical desalting.
18/11/2010 A: Marcello Ferrara, ITW SrL, mferrara@itw.it
If the desalter is performing properly you should not need all of the mentioned chemicals. What is the fate of Desalter effluent ?