Balancing Coal Pipes

摘要

For dozens of years, utilities have spent countless dollars on a variety of techniques and services aimed at balancing their coal pipes. The reality is that manual coal sampling in real world power plant conditions is challenging. Call it dirty airflow or rotorprobing, ASME sampling or isokinetic sampling; it does not work for the purpose of accurately measuring coal flow. This should come as no surprise -- the procedure is inherently flawed. Without the ability to accurately measure the coal mass and velocity, the "blind" movement with orifices or other adjustable valves often causes more imbalances and other combustion problems. Today's real-time measurement methods lead to correct data collection and then improved combustion. These instruments can be used in your distributed control systems for on-line control of primary air, coal feed, fuel:air ratio control using burner secondary air and more. All of this will result in reduced emissions, improved efficiency, fewer tube leaks and more.