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Advanced Course in Heat Exchangers: Theory and Practice. ICHMT Symposium.
1981, Dubrovnik, Croatia

DOI: 10.1615/ICHMT.1981.AdvCourseHeatExch


ISBN Print: 978-0-07062-806-9

Fouling in Crude Oil Preheat Trains

pages 841-852
DOI: 10.1615/ICHMT.1981.AdvCourseHeatExch.540
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ABSTRACT

The crude oil distillation unit is a major energy consumer in any refinery. The necessity to ensure efficient heat recovery from refluxes and product streams has been the subject of many articles (1). The efficient operation, monitoring and prevention of fouling in such systems have been sparsely reported ; most articles in the literature omit to compare different units or to suggest ways of improving existing exchangers or preheat trains so as to minimize fouling or its effects.
This paper addresses the topics of crude preheat train performance monitoring and compares actual fouling resistances with those normally recommended.
The different mechanisms of fouling are discussed and an innovative technique developed by TOTAL - UMP is described which has shown promising results in industrial trials.
By linking fouling rates to energy usage for a specific unit we are able to calculate an optimum interval for exchanger cleaning based on present day fuel, additive and cleaning costs.
Finally different exchanger and preheat train configurations are compared in an effort to point up useful criteria for their selection.

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