| 摘要 |
PURPOSE:To reduce heat loss, by a method wherein large grain size matter is taken out from unburnt matter in exhaust gas to burn it in a combustion furnace again. CONSTITUTION:A solid fuel, stored in a fuel hopper 2, is supplied to a combustion furnace 1 by a feeder 3 for combustion, combustion gas therefrom is guided to a cyclone 5, and unburnt matter in the combustion gas is collected and supplied to a classifying device 6 to exhaust the combustion gas from which unburnt matter is removed. The unburnt matter introduced to the classifying device 6 is separated into large grain size matter with large grain size and small grain size matter with small grain size. The large grain size matter is stored to a hopper 7 once, and the small grain size matter is removed from the classifying device 6 to damp it. |
