| abstract |
PROBLEM TO BE SOLVED: To provide an exhaust gas processing method capable of removing mercury, which enables efficient operation and performance maintenance without adversely affecting an apparatus in the system. SOLUTION: A mercury treatment method in exhaust gas in which exhaust gas containing nitrogen oxides, sulfur oxides and mercury is subjected to reductive denitration treatment in the presence of a solid catalyst after addition of a chlorinating agent and then wet desulfurized with an alkali absorbent. Then, the mercury concentration is measured for the exhaust gas after the wet desulfurization, and a predicted value of the inlet mercury concentration before the reductive denitration treatment is calculated based on the mercury concentration, and the amount of change between the predicted value and the reference inlet mercury concentration is calculated. And a method for treating mercury in exhaust gas, which adjusts the supply amount of a chlorinating agent to be added before the reduction denitration treatment, and an exhaust gas treatment system. [Selection] Figure 1 |