Method and system for controlling an exhaust gas recirculation system

A method of reducing constituents within an exhaust stream, wherein the exhaust stream is generated by a turbomachine;

• the method comprising:
• diverting a portion of total exhaust stream, considered recirculated exhaust, generated by the turbomachine to an EGR system;
• opening a bypass modulation device to allow the remains of the total exhaust to discharge through a bypass stack;
• adjusting a flowrate of the recirculated exhaust, wherein an EGR flow conditioning device may apportion up to 35% of the total exhaust stream to become the recirculated exhaust stream;
• determining a pressure drop of the EGR system;
• operating the EGR flow conditioning device to adjust the flowrate in a manner that overcomes the pressure drop;
• selecting a constituent present in the recirculated exhaust stream from a list of constituents;
• operating a temperature condition device to cool the recirculated exhaust stream;
• operating a constituent reduction system (CRS) to reduce a concentration of the constituent;
• wherein the CRS operatively:
• determines a dew point temperature associated with the recirculated exhaust stream;
• cools the recirculated exhaust stream to a temperature below the dew point temperature;
• uses a scrubber to remove particulates of the constituent;
• wherein the scrubber injects a liquid to scrub the particulates out of the recirculated exhaust stream;
• determines an injection rate of the liquid, wherein the injection rate is function of a concentration of the constituent within the recirculated exhaust stream;
• determining whether the constituent is within a constituent range;
• and
• if the constituent is within the constituent range, then modulating at least one flow control device to allow for the recirculated exhaust stream to enter an inlet section of the turbomachine.