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

摘要

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 de-bottlenecking. 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.