ELECTRIC FILTER VOLTAGE AUTOMATIC CONTROL METHOD Russian patent published in 2005 - IPC

FIELD: scrubbing gases from dust and mist, possibly in high-voltage rectifying units for supplying rectified high-voltage current to gas-purifying electric filters.

SUBSTANCE: at operation of system "rectifying unit-electric filter" in modes with sharp change of technological parameters of purified gas (dust content, humidity, specific electric resistance, dispersed content of trapped dust and so on) breaking level of voltage of settling space of electric filter changes in wide range 15 - 80kV. In order to keep voltage of electric filter according to maximally possible value, automatic control system detects mean value of electric filter and regulation angle value and sets depending upon said values gain factor of positive feedback circuit. As mean voltage of electric filter increases, gain factor decreases and vice versa. As regulation angle decreases, gain factor increases and vice versa.

EFFECT: enhanced reliability and accuracy of automatic control.

2 cl, 2 dwg