| 摘要 |
Arrangement for permitting control of the current and/or voltage values connected to the respective electrode groups in an installation (1) comprising several electrostatic dust separators or electrode groups (A, B, C) so that the total current and voltage requirement of the installation can be minimised to give a desired dust loss and where the installation is provided with a unit (15) which evaluates an actual dust loss in the outgoing, cleaned gases, together with a control arrangement appertaining to each electrode group, so arranged that as a function of control signals received it raises or lowers the current and/or voltage values for the associated electrode group. An actuating device (16) common to all electrode groups is arranged so that in an initial time period (t1-t2) it instantaneously changes the prevailing current and/or voltage value for an initial electrode group (A), and after evaluation of a change in the dust loss (dS) in the installation corresponding to the alteration it stores (18) the said change. In a second time period the changed current and/or voltage value is restored to the value prevailing prior to the change. In a third time period (t3-t4) the instantaneous current and/or voltage value is changed for a second electrode group (B) and after evaluation of a change in the installation dust loss which corresponds to the alteration the said change is stored (19). During a fourth time period it restores the changed current and/or voltage value to the value prevailing prior to the change, etc. <??>After an evaluation has been made of preferably all the electrode groups (A, B, C), that group or those groups which give a predetermined change in the dust loss in the event of applied change in the current and/or voltage value receive, via the actuating device (16) and a calculation circuit (21) arranged therein, a changed current and/or voltage value (SA-SC) which gives rise to a change ( DELTA S) in the dust loss towards the desired or permitted dust loss. |
