Microsecond pulsed power supply for electrostatic precipitators

Fine particles emissions are much more dangerous to health than the larger ones. Collecting of fine particles below 10 /spl mu/m (PM/sub 10/) in electrostatic precipitators has not been very efficient with conventional systems. A new pulsed power supply was developed with a pulse duration below 10 /spl mu/s. To use it with existing precipitators, the current capability had to be in the kA range. It is possible to generate a high charge density in the spray wire area which leads to increased charging of the fine particles. Flashovers are mainly avoided due to the short pulse duration. Data was recorded on a real precipitator in a power station.