METODO ED APPARECCHIO PER CONTROLLARE LE EMISSIONI DI PARTICELLE SCARICATE DA IMPIANTI DI COMBUSTIONE.

摘要

Diesel engine exhaust particulates are electrically charged during the formation of the particulates in the engine combustion chambers. Consequently the particulates are able to be collected in a particle collector (52) provided by a static electric field precipitator powered by a high voltage power supply (53) of several thousand volts. The collector includes spaced electrodes connected to the high voltage power supply and to ground in alternation. Particulates of sub-micron size enter the collector from the engine and are retained on the electrode surfaces by electrostatic and adhesion forces. Particles of larger size than the sub-micron particles break loose from the electrodes and re-entrain in the gas moving through the collector. These larger particles are readily removed by a particle collection device such as an inertial separator or scrubber located downstream of the collector.