TREATMENT METHOD FOR ACID EXHAUST GAS GENERATED FROM COMBUSTION FACILITY, COMBUSTION FACILITY AND ACID EXHAUST GAS TREATMENT AGENT

摘要

PROBLEM TO BE SOLVED: To provide a treatment method for an acid exhaust gas generated from a combustion facility which can reduce the amount of a chemical agent necessary for making hydrogen chlorides, sulfur oxides and nitrogen oxides harmless as well as the amount of fly ash exhausted to a final disposal site.SOLUTION: A treatment method for an acid exhaust gas generated from a combustion facility one cycle of which is the following steps (1) and (2) executes the cycle and uses laminar double hydroxide regenerated by the step (2) of a cycle before any of the second cycle and subsequent cycles as at least one of the laminar double hydroxide used for the step (1) of the cycle. (1) The step of bringing a solid acid exhaust gas treatment agent containing a laminar double hydroxide in contact with an acid exhaust gas generated from the combustion facility to exchange anions i contained in the laminar double hydroxide with anions ii based on an acid substance in the acid exhaust gas. (2) The step of regenerating the laminar double hydroxide by exchanging the anions ii in the laminar double hydroxide with the anions i, and recovering an acid substance produced as the anions ii are desorbed.SELECTED DRAWING: None