WASTE HEAT RECOVERY BOILER AND OPERATING METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To structure a support structuring member from a normally used member such as a low alloy steel and austenite group stainless steel by lowering temperature of the support structuring member of a heat transfer tube group provided in the downstream of a heating source forming a combustion improving device to the temperature of the exhaust gas in the upstream of the heating source. SOLUTION: This waste heat recovery boiler leads the exhaust gas into a duct formed by arranging a plurality of heat transfer tubes to recover the heat of the exhaust gas, and the heating source 11 by the energy supplied from outside the boiler is arranged between the heat transfer tubes. Inner walls 8a and 8b extended in the exhaust gas flowing direction are provided in an upper part or a lower part or the both of a heat exchanger part of the heat transfer tube groups 4 and 5 inside the outer wall 1 of the duct. The support structuring member 6 as a non-heat-transfer part is arranged in spaces 9a and 9b formed between the inner walls 8a and 8b and the outer wall 1 of the duct. A part of the exhaust gas is led into the spaces 9a and 9b formed between the inner walls and the outer wall of the duct from the upstream of the heating source 11. COPYRIGHT: (C)2005,JPO&NCIPI