| 摘要 |
PURPOSE:To improve a turn down ratio and to prevent the occurrence of fuming during low combustion by a method wherein, in a hydraulic burner type combustion device using no spray medium, a damper control motor is controlled by means of an external signal, and an airflow damper and a step controller for controlling a solenoid valve for fuel are controlled. CONSTITUTION:By means of a signal from the exterior in relation to a boiler pressure and a furnace temperature or an input signal from an output change- over switch, a damper control motor 7 is run to drive and control a damper 6. A step controller 8 is actuated with the aid of the damper control motor 7 to control opening and closing of solenoid valves 2a-2x disposed in fed feed pipe 3a-3x respectively. This constitution enables the improvement of a turn down rate without increasing a fuel oil feed pressure and permits improvement of combustion efficiency through the prevention of the occurrence of fuming during low combustion. |
