A Method for On Line Cleaning of Heat Exchangers to Significantly Increase Energ...
A Method for On Line Cleaning of Heat Exchangers to Significantly Increase Energy Efficiency in the Oil Gas Power Chemical Process Sectors
Fouling of heat exchangers in refining industry crude oil preheat trains is a chronic operating problem that reduces heat transfer and energy recovery in these systems costing the industry $4.5 billion per annum. Eight percent of...
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Descripción del proyecto
Fouling of heat exchangers in refining industry crude oil preheat trains is a chronic operating problem that reduces heat transfer and energy recovery in these systems costing the industry $4.5 billion per annum. Eight percent of industrial plant operating costs may be attributed to heat exchanger fouling. Despite enormous costs associated with fouling, the industry relies on off-line cleaning because there are no on-line systems capable of operating under high temperature, low velocity conditions with chemically reactive fluids. The cost of taking plant off-line inevitably means that the heat exchanger operates at significantly less than peak efficiency. Our proposed solution is to develop an innovative projectile based on-line cleaning and injection system that will work under the required operating conditions to mitigate foulant build-up throughout the heat exchanger. Achieving our objectives will require research to formulate accurate correlations of foulant deposition rate as a function of geometry and operating conditions, the development of a composite projectile material to achieve the required mechanical properties and chemical stability as well as a projectile trajectory control system to deliver a uniform distribution of projectiles over the heat exchanger tube-face. Furthermore; ensuring that projectiles are propelled through the heat exchanger tubes in a low velocity regime will require us to devise a means to temporarily increase flow velocity through selected heat exchanger tubes. Research will concentrate on characterizing foulant deposition mechanism, structure and rate, projectile tribology as well as gaining a detailed understanding of heat exchanger fluid flow and its control. The proposed solution will provide the industry with significant energy savings of over 10% and reduce the CO2 foot print across a wide range of industrial sectors.