ULTRA-Dynamics has released a coal mass flow distribution measurement system which is said to improve boiler efficiency and reduces combustion problems.
The Promecon’s Mecontrol COAL online Pf-flow measurement system determines the absolute coal mass flow directly in burner pipes and the distribution of pulverised fuels from the coal mill to the burners.
The density and transport velocity of the coal is independently measured within each measurement cycle. The concentration and velocity measurement are performed by a pair of sensors aligned parallel to the longitudinal axis of the pipe. A separate sensor can provide an on-line particle size distribution measurement.
The system utilises an advanced microwave technology which sends a signal to the individual pipe sensor pairs. In various configurations the measuring cabinet can monitor up to 32 pipes. Important plant data, such as feeder signal can be recorded and processed by the system for optimisation purposes.
The company says unbalanced coal distribution contributes to combustion inefficiency and can be utilised for on line analysis of process and control variations within the combustion process. Use of the technology can improve the CO and also O2 stratification by use of coal flow signals for on line control of the secondary air.