APPARATUS AND METHOD FOR CLEANING SMELT SPOUTS AND SMELT DISCHARGE OPENINGS OF A CHEMICALS RECOVERY FURNACE OR BOILER

An apparatus comprising a cleaning rod driven in reciprocating， axial extension (y) and retraction (x) movements upon cleaning a smelt discharge opening of a chemicals recovery boiler， wherein a linear actuator is controllable for driving the cleaning rod in the axial movements. A pivot actuation means is controllable for pivoting the cleaning rod about an axis (S) upon cleaning a smelt spout associated with the smelt discharge opening， wherein one or more sensors are arranged to provide control basis for correlation of the axial movements (x; y) with the change in pivot angle (φ) during pivoting of the cleaning rod. A method to be performed in use of the apparatus is likewise disclosed.