| 摘要 |
PURPOSE:To completely burn chaffs and consequently prevent the generation of soot and dust by a method wherein the volatile combustible matter in the chaffs is completely burnt in a secondary combustion chamber. CONSTITUTION:The chaffs supplied from a rotary valve 6 are tangentially fed into a combustion furnace 8 together with the air of a chaff feeding blower 7 from the feed water port 9 of the combustion furnace 8. The volatile matter in the chaffs is evaporated by means of air and fuel fed from a primary air feeding port 10 and sent upward into the primary chamber 11. On the other hand, the chaffs removed the volatile matter therewithin by evaporation are turned to be char and conveyed onto a transfer conveyor 12 from the lower part of the combustion furnace 8. The evaporated gas drawn in the secondary chamber 11 is completely burnt by mixing with the air fed from an air feeding port 15 and exhausted from an upper funnel 16. In such a manner as mentioned above, in cooperation with the decrease of the air amount to be fed in the furnace 8 from the air feeding port 10, the amount of the soot and dust produced within the furnace 8 can be reduced. |
