| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for stabilizing acid gas and a combustion exhaust gas treatment facility capable of properly controlling an amount of addition of two alkali agents to be added to the acid gas, having properties different from each other.SOLUTION: A combustion exhaust gas treatment facility 10 to which a method for stabilizing acid gas is applied includes: a second acid gas measuring device 30b, a first addition device 42, and a second addition device 44, provided at an introduction path 3; a first acid gas measuring device 30a provided at an exhaust path 4; and a device 50 for controlling an amount of addition. The device 50 for controlling the amount of addition includes: a calculation unit 60 of a first amount of addition, for receiving a first acid gas concentration signal S0a and outputting a signal S21 of the first amount of addition; and a calculation unit 70 of a second amount of addition, for receiving a second acid gas concentration signal S0b and the signal S21 of the first amount of addition, and outputting a signal S22 of the second amount of addition. On the basis of the signal S21 of the first amount of addition and the signal S22 of the second amount of addition, the first addition device 42 and the second addition device 44 respectively add a first alkali agent and a second alkali agent to combustion exhaust gas flowing in the introduction path 3.</p> |
