Non-invasive methods to comply with emission regulations

Maintaining emissions below permissible levels is a critical aspect of turbine operation. Methods to achieve regulatory compliance have to be non-invasive to ensure continued operation of the turbine. 

Five methods are recommended, which can be implemented by turbine owner/operators to lower emissions and increase combustion efficiency. One of the recommended practices is a new technology called Dry Low Emissions/Dry Low NOx  (DLE/DLN) mapping, which analyzes signals of turbine conditions over time (please see March/April 2011 issue of Turbomachinery International magazine for more). 

DLE/DLN mapping can analyze performance data from the existing control systems and field devices to determine a turbine’s actual performance.  Then, adjustments can be made to the system to optimize combustion and lower emissions.

The following can be part of an effective emission control system:

• Emission Monitoring Systems. These include Predictive Emissions Monitoring Systems and Continuous Emission Monitoring System
• DLE/DLN mapping -- which graphis fuel flow, rpm and temperature and analyzes data to move the turbine closer to performance curves.
• Valve inspections for process and large steam turbines
• Water injection for older turbines
• Selective Catalytic Reduction