undefined STORM's 13 Essentials These STORM 13 Essentials have expanded from the 10 prerequisites for optimum combustion, first promoted in the 1980’s. The point is, they are simple, have been around a long time, and they make a great “punch list” for resolving slagging, L.O.I., and NOx issues in large P.C.-fired utility boilers. Furnace Essentials Burner Essentials Airflow Essentials Pulverizer Essentials STORM 13 Essentials for Optimum Combustion for Low NOx Burners on P.C. Boilers Furnace exit must be oxidizing (preferably at 3%) Fuel lines balanced to each burner by “clean air” test to ±2% or better Fuel lines balanced by “dirty air” test to ±5% or better Fuel lines balanced in fuel flow to ±10% or better Fuel line fineness shall be 75% or more passing a 200 mesh screen and 50 mesh particles shall be less than 0.1% Primary airflow shall be accurately measured & controlled to ±3% accuracy Overfire air shall be accurately measured & controlled to ±3% accuracy Primary air/fuel ratio shall be accurately controlled when above minimum airflow set-point Fuel line minimum velocities shall be above 3,300 fpm Mechanical tolerances of burners and dampers shall be ±1/4″ or better Secondary airflow indication should be within ±3% of the measured airflow and distribution to the burners within ±5% Fuel feed to the pulverizers should be smooth during load changes, measured, and controlled as accurately as possible. Load cell equipped gravimetric feeders are preferred Fuel feed quality and sizing should be consistent. Raw coal “top size” should not exceed 3/4″ to each pulverizer Contact Us 411 North Depot Street Albemarle, NC 28001 , USA +1 (704) 983 - 2040 storm@stormeng.com Follow Us Sign up for our Newsletters! SUBSCRIBE Storm's Large Electric Utility Boiler Combustion & Performance Optimization Seminar Click here for more information © 2020 Storm Technologies, Inc. All rights reserved Privacy Policy Disclaimer