Corrosion classification of pipelines in hydrocracking units (ISOMAX) by data mining

Abstract

One of the best and important unit in oil refineries is Hydrocracking unit. In this study, one of specific type of decision called the conditional contract arrangement, is used to extract the relevant knowledge in Hydrocracking Units (ISOMAX) for 3 factors: The conditional of feed (temperature, pressure and density), pH in separator drum, H2S in recycle gas (centrifugal compressor). This paper aims to optimize some conditions to eliminate corrosion in ISOMX unit. After analyzing all of stage to the above mentioned (data for separator vessel), according to the obtained results, the best range of feed is: density is less than 0.81 kg/m3, temperature is less than 65 °C and pressure is less than 1.9 bar. Also pH in separator is more than 7.3 and H2S in recycle gas, centrifugal compressor, is less than 10000 ppm. The results also show how this findings can be used to gain insight into some petrochemicals and refineries to deliver results in a comprehensible and user-friendly way. Keywords: Conditional contract, Corrosion, Feed, H2S, Isomax, pH