pH Measurement and Control of Oil Refinery Desalter Wash and Brine Waters

摘要

Crude Oil contains unwanted contaminants that must be removed before refining, such as salt and other contaminants: KCI potassium chloride , NaCl, MgCl, CaCl, sand, drilling mud and paraffin waxes. These contaminants are removed by electrolysis with the 5-9% addition of water, which require pH installations for the monitoring of desalter wash waters and brine effluent waters. These can both prove challenging. The wash waters have a pH 5.5 - pH 7.00 contaminated with Ammonia and Phenols Temperatures can ＞ 100 C, and the brine effluent waters contain sulphides, heavy metals, and oil - this cocktail is often very abrasive. Electrode fouling and poisoning is a risk.