| 摘要 |
A duct wall surface structure wherein, in a flue which carries a solid-gas two-phase flow and is formed by a duct made of steel plates, and is equipped with hoppers, the solid particle trapping efficiency in the hoppers is improved, thereby reducing the outflow of these particles downstream from the duct. This duct wall surface structure, which is for a flue (10) carrying a solid-gas two-phase flow containing large-diameter ash (50) in the gas flow, is equipped with a first hopper (20A), which is provided at the lower end of a first vertical flue part (12) installed in the direction in which the flow has a velocity component in the up-down direction, and which recovers the large-diameter ash (50) from the gas flow. In addition, a low-rebound part (60) having a smaller rebound coefficient than a steel plate is provided on a slanted surface (21) against which the large-diameter ash (50) collides upstream from the first hopper (20A) in the flow direction. |
