| 摘要 |
PROBLEM TO BE SOLVED: To provide a furnace wall structure of an entrance connecting portion capable of making reduction of heat stress and securement of welding performance compatible, and improving durability and reliability by solving a problem on fatigue failure. SOLUTION: In this furnace wall structure of the entrance connecting portion 10 where a furnace wall of a boiler furnace is composed of furnace wall pipes 2 arranged approximately in parallel with each other with prescribed clearances, and fins 3 mounted in a state of closing the clearances, and the furnace wall pipes 2 are bent in a state of changing the direction approximately at a right angle at an intermediate pipe collecting portion of the boiler furnace, the furnace wall pipes 2 are bent by using bent pipes 11 having axes C1, C2 approximately orthogonal to each other on a flow channel axis. COPYRIGHT: (C)2008,JPO&INPIT
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