Advanced On-line Sodium Measurement

Monitoring sodium levels is vital for tracking cation exchange performance and makeup water purity. Speed and accuracy of measurement are critical in helping to prevent mixed bed regenerations and contaminants reaching turbines. A new sodium instrument not only delivers timely results down to sub-ppb levels, it is self-calibrating, therefore greatly reducing operator effort. READ MORE…

FUEL SWITCH AND SCR TEMPERATURE CONTROL WITH THE INTEGRATION OF THE SMART CLEAN TECHNOLOGY IN PROGRESS ENERGY MAYO STATION

Selective catalytic reduction (SCR) technology is being increasingly applied for controlling emissions of nitrogen oxides (NOx) from coal-fired boilers. For many power plants, temperature control becomes an essential challenge to ensure optimal SCR performance and to keep the material integrity of the SCR structure. Progress Energy MAYO Plant has a tandem boiler design with a Gross Power Generation Capacity of 2 x 400 MW. The plant decided to change their coal source to a lower HHV type PRB coal and integrated Clyde Bergemann’s SMART Clean technology to deal with the changes in the coal quality and ensure a stable flue gas temperature going into the SCR. The new SMART Clean technology optimized the cleaning to control the Economizer Exit Gas Temperature (EEGT) at a desired set temperature. The results of the performance tests showed that the EEGT control was successful and the temperature profile stabilized after implementing the new SMART Clean technology. The new technology derives decisions and changes the cleaning strategy based on the effect of the sootblowers on the heat transfer performance rather than the traditional approach of targeting a static cleanliness level in the boiler. The performance data of the closed loop tests are presented as well as the economical justification of the project.

Bentley OpenPlant: At the Forefront of Interoperability - A new white paper from the Schnitger Corporation