Flue gas recirculation system and method
AssigneeTexaco Inc.
InventorsEric L. Berger, Karl W. Kolthoff, Thomas J. Rankin
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Abstract
The present invention relates to an apparatus and method for improving the economics of flue gas recirculation. In particular, the present invention relates to an apparatus for the minimization of oxides of nitrogen ("NO.sub.x ") in the exhaust gas of various combustion processes via balanced pressure drops of the recirculation gas, and a method for the calculation of flue gas recirculation percentage. The flue gas recirculation system achieves the balanced pressure drops by sizing the air intake line and recirculation line associated with the system.
Claims10
A method for determining flue gas recirculation percentage comprising:
- measuring a first temperature (T.sub.1) at a first temperature sensor in an air inlet line for providing air to a combustion generator;
- measuring a second temperature (T.sub.2) at a second temperature sensor in a recirculation line coupled between the air inlet line and an exhaust stack of the combustion generator;
- measuring a third temperature (T.sub.3) at a third temperature sensor in a line coupled between a blower and a burner section of the combustion generator;
- calculating a temperature factor (T.sub.3 ') by subtracting the temperature of said blower from T.sub.3 ;
- and
- calculating the flue gas recirculation (FGR) percentage in accordance with the following equation ##EQU11##
Dependencies are inferred from the claim text.