| 摘要 |
PURPOSE:To treat material to be burned at a low cost with a high efficiency through a promoted agitation to be mixed with a heat medium by recrushing the material left crushed insufficiently in the pretreatment process with the rotation of a paddle feeder. CONSTITUTION:When remaining too large down at the bottom of a spiral fluidized bed due to insufficient crushing, some of the material to be burned dumped from a charging inlet is stirred to be mixed with a heat medium 2 being recrushed through a clearance of a paddle 5 and a paddle feeder trough 3. Then, it is evenly mixed with a heated pressure air being injected from an orifice nozzle 4 and returned into the upper portion of the spiral fluidized bed for complete combustion. Material left unburned in those burned is mixed with the heat medium 2 and carried out to a discharging tube 16 with the rotation of a paddle feeder shaft 6. At the same time, the heat medium 2 is separated from the material unburned and conveyed to a separator from a heat medium discharging tube 18 and then returned into a furnace body 1 through a heat medium return tube 19. |
