| 摘要 |
<p>PROBLEM TO BE SOLVED: To maintain a stabilized fluidized bed and, simultaneously, stabilize the quality of a product against the variation of the amount introduced and water content of a raw material and to stabilize the firing chamber temperature against the variation of the amount of organic substances in sludge and the calorific value and, simultaneously, prevent adhesion and re-carbonation of a fine powder in a cyclone to recover a high quality product. SOLUTION: In the apparatus having a fluidized bed furnace 20 of the two-chamber type for drying a granulated raw material in a drying chamber 26, then conducting incineration of organic substances and decomposition/firing of hydrated lime in a firing chamber 28, removing dust from the exhaust gas of the furnace 20 by a cyclone 58, then mixing the resulting gas with an odor in a mixing chamber 59, and introducing this mixed gas into a heat exchanger 46 to recover heat, by controlling the drying chamber 26 temperature and the flow rate of each chamber even with a variation of the amount introduced and water content of the raw material, a stabilized fluidized bed can be maintained to stabilize quality, and by controlling the cyclone 58 outlet temperature, adhesion and re-carbonation of a fine powder can also be prevented to stabilize the burning chamber 28 temperature, and thus, a product of high quality can be recovered.</p> |
