| 摘要 |
A furnace wall structure (1), wherein a furnace wall (1) having a furnace wall lower part (A) formed of a furnace wall pipe (2a) with a spiral upwardly inclined flow passage, a nose part (C) with a nose wall pipe (5a) installed at the intermediate part of a furnace rear wall (B) arranged continuously with the furnace wall lower part (A), and a screen part (D) with a screen pipe (7) is installed and the end part of the furnace wall pipe (2a) is disposed on the lower side of the noise part (C) so that drain produced in the nose wall pipe (5a) when a boiler stops the operation is allowed to flow by itself into the furnace wall pipe (2a) on the lower side of the nose part (C) and, when a header (6) is connected to the end part of the furnace wall pipe (2a), that the drain produced in the nose wall pipe (5a) is allowed to flow by itself into the header (6), a furnace wall pipe (2b)(2b1, 2b 2) extending from the end part of the furnace wall pipe (2a) upward in vertical direction is installed, one part (2b1) of the furnace wall pipe (2b) is connected to the header (6), the header (6) is connected to the nose wall pipe (5a) through a vertical pipe (5e1, 5e2), the other part (2b2) of the furnace wall pipe (2b) is directly connected to the screen pipe (7), and the vertical furnace wall pipe (2b)(2b1, 2b2), the vertical pipe (5e1, 5e2), and the screen pipe (7) are weld-connected through a membrane bar (3) integrally with each other, whereby the furnace wall structure not requiring a reinforcement support to support the weight of the furnace wall lower part (A) can be provided.
|
