SYSTEM FOR ANALYZING CARBON DIOXIDE CONCENTRATION OF AMINE-BASED ABSORBING SOLUTION, CARBON DIOXIDE RECOVERY SYSTEM, AND METHOD OF OPERATING THE SAME

摘要

Provided are: a system for analyzing the CO2 concentration of an amine absorbing solution whereby the CO2 concentration of an amine absorbing solution can be automatically measured on-line, regardless of whether the absorbing solution has a high or low amine concentration; a CO2 recovery system; and a method for operating the same. To analyze the CO2 concentration of an amine absorbing solution which is utilized while being circulated between an absorption column 10, in which the amine absorbing solution is brought into a gas-liquid contact with a CO2-containing gas to be treated so as to absorb CO2, and a regeneration column 20 for regenerating the absorbing solution having absorbed CO2, at least one factor selected from among viscosity, electric conductivity and ultrasonic wave propagation speed of the amine absorbing solution is measured by a measurement device 40 and then the CO2 concentration of the amine absorbing solution is computed by a controller 50 on the basis of the measurement result(s).