The Fired Heater Unit Operation raises the temperature of fluid on one side by burning fuel on the other side. The Fired Heater model acts as a combustion reactor and heat exchanger.
The Fired Heater unit operation has two sections as in heat exchanger. In the Process Side, process fluid to be heated is sent to tube side and comes out of the exit. In the Combustion Side, one or more streams comprising of Fuel and Air are sent in and one exit for FLUE gas; where a combustion reactor is modeled. Only Heat transfer occurs across the two sides. No mass transfer occurs across the two sides. Feeds to the Fired Heater unit operation can be to either of these two sides.
There will be one or more hydrocarbon (fuel) and air/Oxygen streams feeding the unit operation. These streams will be burned to produce a single product stream on the combustion side.
The hydrocarbons and carbon monoxide are assumed to be completely converted into carbon dioxide and water.
Any amounts of hydrogen sulfide present are assumed to be completely converted to sulfur dioxide and water.
Nitrogenous Compounds are assumed to be converted from N to N2.
Assumed also that there is no recirculation of flue gases in the burner chamber.
Related Topics
Fired Heater - Temperature Spec
Fired Heater - Initial Estimates
Fired Heater - Salient Features
Fired Heater - Design and Assumptions