| 摘要 |
A flue gas treating system including a gas-gas heater (8) and/or a dust collector (2), and a wet flue gas desulfurization apparatus (100), characterized in that the flue gas treating system is equipped with addition means (110) for adding an alkaline agent to an absorbent slurry, a pH detector (38) for detecting the pH of the slurry, gas-gas heater operational state detection means (120), dust collector operational state detection means (130), and alkaline agent addition control means (140) for controlling the amount of alkaline agent added in response to signals from the pH detector (38), the gas-gas heater operational state detection means (120) and the dust collector operational state detection means (130), so that the pH and calcium compound concentration of the absorbent slurry can be controlled. <IMAGE> |
