METHOD TO POWER ELECTROFILTER FOR GASSES PURIFICATION AND APPARATUS FOR ITS REALIZATION Russian patent published in 1996 - IPC

FIELD: electrical engineering, gasses purification by electrofilters, electrofilters power sources in particular. SUBSTANCE: method provides, that voltage of electrofilter electrodes is increased till break-through using high-voltage power source, that has voltage stepping-up transformer with thyristor regulator in primary winding circuit and electronic switch in the form of valve with pentode voltage-current characteristic, that is connected between rectifier and electrofilter. In case of break-through thyristor regulator and electronic switch are simultaneously closed. After given time interval required for deionization of interelectrodes space electronic switch is opened first and then thyristor regulated is also opened, realizing slow voltage rise till next break-through. Apparatus has sensor of electrofilter voltage, spark discharge selector, thyristor regulator control signals former, control device, that has power amplifier and exciter. Capacitor is connected to poles of rectifier. Exciter has controlled input and third output and its input is connected to output of spark discharge selector and its third output is connected to second input of thyristor control signals former. EFFECT: improved control of electrofilter power source. 6 cl, 3 dwg