| 摘要 |
PROBLEM TO BE SOLVED: To provide an operation method of boiler systems.SOLUTION: In a coal-fired boiler system which includes a denitration device 52 which removes nitrogen oxide in exhaust gas 11 from a coal-fired boiler 51, an air preheater 53 which recovers the heat in the exhaust gas 11 after nitrogen oxide removal, an electrical precipitator 54 which removes the soot dust in the exhaust gas, a desulfurization device 55 which removes sulfur oxide in the exhaust gas after dust removal, a finish desulfurization device 60 which further removes the sulfur oxide remained after desulfurization, and a COrecovery device 70 which consists of an absorption tower 71A which makes carbon dioxide in the exhaust gas after the finish desulfurization get into touch with COabsorbing solution 72 for removing, and a regeneration tower 71B which recovers and reproduces CO, by exhausting COfrom the COabsorbing solution 72, using an SOcontent measuring device 10 which measures SOconcentration in the exhaust gas 11 in a flue 12 at the entrance side of the absorption tower 71A of the boiler system 50A, the misty and gaseous SOin the exhaust gas are measured, and the amount of SOin the exhaust gas which is introduced into the absorption tower 71A is adjusted according to the measured SOconcentration. |
