Plant Manage+ Problem No. 12 Oil fouling of the high pressure stripper in a urea plant

摘要

The efficiency of the high pressure stripper is a very important parameter in the optimum operation of any urea plant. Fouling of the HP stripper can reduce the efficiency and oil is a typical cause of fouling. Oil can originate from, for example, oil seal systems of high pressure reciprocating ammonia and carbamate pumps and carbon dioxide compressors. Oil can easily cause fouling of the liquid distributor system in the top of the HP stripper (where small holes are present) as the oil can become thick due the stripping of the light components. What are the best methods of solving oil fouling problems and cleaning the HP stripper?