| 摘要 |
<p>The present invention relates to a fluidized bed boiler capable of controlling thermal absorptance of an external heat exchanger. For an embodiment of the present invention, disclosed is the fluidized bed boiler comprising: a furnace which combusts a fuel; a cyclone which is connected to the furnace to collect a bed material; the external heat exchanger which is connected to the lower part of the cyclone to store the bed material and in which a heat exchanger tube absorbing heat from the bed material is formed; and a drain port which is connected between the external heat exchanger and the furnace and has a drain valve controlling the amount of the bed material to be supplied to the furnace.</p> |
