August 2017

Heat Transfer

Revamp fired heaters with a common air-preheating system to increase capacity

In any process plant, fired heaters are generally considered to be one of the most optimally designed pieces of equipment.

Ahamad, S., Vallavanatt, R., Bechtel Corp.

In any process plant, fired heaters are generally considered to be one of the most optimally designed pieces of equipment. Any margin provided during the design stage is consumed very quickly during debottlenecking. Plant operators work hard to extract every possible absorbed heat duty from a fired heater. In many refineries, fired heaters are often over-fired beyond their design limits, mainly to meet increased capacity requirements. Once its operation has been maximized and the fired heater capacity cannot be increased any further, the only available option is to continually revamp the fired heater to improve capacity and efficiency. Revamping a fired heater is not an easy task, and it b

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