June 2015

Maintenance

Develop an optimal cleaning strategy for crude preheat trains

Fouling in heat exchangers is common throughout the process manufacturing industries. Fouling presents a large opportunity for owner-operators to reduce operating expenses and maintenance costs.

Hegy, S., Aspen Technology Inc.

Fouling in heat exchangers is common throughout the process manufacturing industries. There are many different types of fouling, such as particulate fouling, crystallization fouling, corrosion fouling, chemical reaction fouling and biofouling. They all have the same impact, lowering the overall heat transfer coefficient of exchangers, impeding fluid flow, accelerating corrosion and causing an increase in pressure drop across exchangers. According to one study, losses due to fouling in industrialized nations constitute an alarming 0.25% of the GDP.1 To combat these losses, owner-operators typically spend $40,000–$50,000 to clean individual heat exchangers, amounting to 15% of the mainten

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