| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To remove scales as preliminarily planned by injecting a required amount of a scale remover, even when scales in a temperature sensor mounting portion or nearby area is peeled. <P>SOLUTION: A boiler includes a temperature sensor 14 detecting temperature of a water tube 4, a chemical injection device 16 injecting a scale remover to a water feeding line 12, and a controller 11 controlling an operation of the chemical injection device 16 based on a detection value of the temperature sensor 14. The controller 11 starts injection of the scale remover by the chemical injection device 16 when a detection value of the temperature sensor 14 reaches a first set value or more, and stops injection of the scale remover after a set injection time has passed. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
