| 摘要 |
PURPOSE:To obtain a steam generator in which scale clogging of feed water and drain tubes is prevented and safety, durability of a boiler are improved in a steam generating boiler. CONSTITUTION:Feed water and drain tubes 4 are provided in a steam generating boiler 1, and a drain control pin 5 and a forcible rupture pin 6 of a scale piece 7a are provided in an opening 4a opposed to the boiler 2 of the tubes 4. Drain fluid pressurized to a steam pressure P of the boiler 1 is used, the piece 7a in the boiler 1 is collided with the pin 6 to finely collapse the piece 7a, thereby preventing clogging of the pieces 7a in the opening 4a of the tubes 4 and in feed water and drain lines. |
