METHOD AND APPARATUS TO CONTROL ELECTROSTATIC FILTER OPERATION Russian patent published in 1995 - IPC

FIELD: electrostatic filter operation control. SUBSTANCE: in outgoing industrial gasses purification electrostatic filter, fed from source of general or intermittent feeding of permanent voltage, charges, i.e. reverse coronal discharge is discovered in precipitating dust in process of purification due to realization within duration of each permanent voltage cycle feeding of periodical rise of filter current up to arc-shaped discharge and possible blocking and comparing of filter voltage minimum value before and after arc discharge. In the case minimum value after arc discharge is being corrected using given adjusting factor. Measurement in the case is exercised for each separate pulse (arc discharge) because arc discharge, decreasing degree of purification, may be prevented already during following pulse. Accurately controlled rise of filter voltage after arc discharge is being exercised with the account, that, for example, voltage during three semi-periods of network frequency is being increased up to level, that is equal to average voltage of arc discharge in spite of concrete response of permanent voltage feeding this time. EFFECT: increased degree of purification. 6 cl, 4 dwg