| 摘要 |
PURPOSE:To make it possible to correctly detect the fluidization starting period of a medium by detecting an abrupt rise of the rising ratio of the temperature within the layer when starting cells which are in standstill, in a method of controlling the operation and stop of each cell of the fluidized-bed burner having a plurality of cells. CONSTITUTION:Air chambers 3a and 3b are partitioned and formed at the lower part of a porous plate 2 of a main body 1 of a fluidized-bed boiler, and cells 7a and 7b are formed at the upper parts of the air chambers 3a and 3b through a diaphragm 6. In this case, when the cell 7a is started while the cell 7a is in operation, the opening degree of a damper 10 is gradually increased through a timer 9. That is, the opening degree of the damper 10 is stepwisely increased every unit time, and a temperature detector 11 detects the change in the layer temperature within the unit time and supplies a result of the detection to a control box 8. The control box 8 calculates the rising ratio of the temperature within the layer per unit time from the result of the detection, and estimates the fluidization starting time of the cell 7a from the time point where the temperature in the unit time abruptly increases. |
