| 摘要 |
A boiler capable of performing a concentration blow with a proper blow amount at all times even if the boiler has a large variation in concentration blow amount as in the case of boilers with large turn down ratio. The boiler comprises a can body, a blower, a duct, an exhaust tube, a separator, a concentration blow line, and a controller. The concentration blow line comprises a plurality of branch lines which have respective blow solenoid valves and which are installed parallel to each other. The controller selectively opens and closes the plurality of solenoid valves for controlling the flow in the concentration blow line by selectively using the branch lines.
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