Patent ID: 9562323
Date: 2017-02-07
CPC Classifications: D21C,E04H

Claim:
1. A recovery boiler plant of a chemical pulp mill comprising: a boiler including a wall having lower region with an outlet to discharge smelt; a dissolving tank proximate to the outlet and configured to receive smelt from the outlet; a smelt spout coupled to the outlet and including a chute extending from the outlet to a position at or over an inlet to the dissolving tank; a shielding hood covering the chute and over at least a portion of a upper region of the dissolving tank, and a shielding room adjacent the wall of the boiler and above the dissolving tank, and the shielding room including walls, a ceiling and a floor, wherein one of the walls includes the lower region of the wall of the boiler, the floor is above the dissolving tank and the ceiling is at an elevation above the lower region of the wall, and the shielding hood is at least partially within the shielding room and separates the shielding room from the chute; wherein the walls, the ceiling and the floor of the shielding room enclose a work volume adjacent the boiler and above the dissolving tank, wherein the work volume is configured as a working space for a person.