| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent collision of ash particles in piping with a wall surface of the piping and to suppress the wear by providing a partition provided with a projecting structure continuous in the circumferential direction of the section of the piping on an outer circumferential side of a bent pipe part. SOLUTION: Ash particles 301 contained in the combustion gas from a fluidized bed boiler flows into a piping inlet 5a, and the ash particles 301b of large grain size are large in inertia force, and flow in a concentrated manner to an outer circumferential side of a bend, and a partition 21 is installed on the outer circumferential side of the bend. The ash particles 301b of large grain size are not directly collided with the piping wall and the wear of an outer circumferential part 5b-1 of the bend can be prevented. A projecting structure 22 continuous in the circumferential direction of the piping section is provided on a rear end of the partition 21. The ash particles 301b concentrated on the partition 21 by the projecting structure 22 are diffused to the inner circumferential side of the bend to suppress concentration of the ash particles 301b of large grain size in the piping, and to suppress the wear at the rear flow piping of the bend.</p> |
