| 摘要 |
PURPOSE:To achieve complete combustion to the refuse to be burned, by maintaining the content of unfluidizable matter in a fluidizing medium such as incombustible matter within a specified rate, by detecting the pressure fluctuating frequency of gas blown into a fluidized bed layer from an air diffuser, and by controlling the feeding rate of matter to be treated or the extracting rate of fluidizing medium from a fluidized bed layer based on the detected value. CONSTITUTION:A pressure fluctuating frequency (f) of fluidizing air being fed into a fluidized bed layer from a wind box 3 through an air diffuser 2 can be determined by providing a strain gauge 4 in the wind box 3, and by analyzing the frequency by using a FFT analyzer 6, after the detected value is amplified by a kinetic strain gauge 5. In order to maintain the content of incombustible matter in sand within a proper range, in the range of 5-10%, for example, it is favorable to control the frequency so as to be 0.6<f<0.7. For this purpose, a raw material hopper conveyer 8 provided at the top of an incinerator furnace 1 and a conveyer 7 to take out incombustible matter fitted to the bottom of an incinerator 1 are controlled by a control unit 13. In such a manner, the best fluidizing condition can be maintained in the titled thermal reaction furnace. |
