ON-LINE CHLORINE ANALYZER FOR CRUDE OIL AND PETROLEUM PROCESS STREAMS

摘要

Residue chlorine content in desalted crude oil streams can be a serious issue due to its highlyrncorrosive nature. Online monitoring of chlorine has an important economic aspect for the oilrnindustry. An online total chlorine analyzer based on monochromatic wavelength dispersive xrayrnfluorescence has been developed for this purpose. This online chlorine analyzer comprisesrnof a low power x-ray tube, an x-ray optical chamber, and a dynamical window module samplernflow cell. An intense monochromatic beam coupled with a highly efficienct doubly curvedrncollection optic provide superior detection capability. A detection limit of 0.18 ppm and arnquantification limit of 0.6 ppm have been achieved. Data collected from multiple systems havernshown great linear response, good robustness and good precision. Crude oil and desalted crudernoil streams were measured for extensive periods of time to demonstrate good stability andrnprecision.