Ejector Nozzle Sizing in an Induced Draft Fired Heater Stack

CFD was used to simulate the amount of air flow rate that a steam driven ejector nozzle can induce in a fired heater stack. Simulation was used to optimize the flow patterns, nozzle size, ejector efficiency, steam flow rate, and induced air purge rate. Critical to the study also, the simulation provided insight regarding the maximum amount of pressure drop the design could overcome.