EXHAUST HEAT RECOVERY BOILER AND DRAIN STRUCTURE OF ITS BOTTOM

摘要

PROBLEM TO BE SOLVED: To provide a drain structure of an exhaust heat recovery boiler in which drain can be collected to one or two positions and discharged and the drain can be completely and rapidly discharged. SOLUTION: A plurality of casing drain holes 2 are provided on the main body bottom casing 1 of the exhaust heat recovery boiler. A plurality of upper drain gutters 3 are provided in the same rows as the casing drain holes 2 in the lower parts thereof. In the downstream side of the upper drain gutters 3, a lower drain gutter 4 is disposed and the lower drain gutter 4 is provided with a gutter drain hole 5. In this case, the upper drain gutters 3 or the lower drain gutter 4 is partly inclined so that the drain can completely and rapidly be discharged.