RECOVERY BOILER PLANT OF A CHEMICAL PULP MILL

The present invention relates to a recovery boiler plant of a chemical pulp mill having a smelt spout area comprising smelt spouts that are connected to the lower part of the boiler for discharging the smelt from the boiler into a dissolving tank， and a working space in front of the smelt spouts. The smelt spout area is separated as a space separate from the rest of the boiler plant spaces. The separate space comprises at least a wall or walls， a ceiling and a door or doors for forming a shielding room. The invention also relates to a corresponding method.