Online detection device and system for amine concentration of carbon capture absorbent

The invention provides an online detection device and system for the amine concentration of a carbon capture absorbent, and belongs to the field of carbon capture. A reaction unit; a metering unit; a titration unit; a color acquisition unit; the data analysis control unit is connected with the liquid inlet unit, the metering unit, the titration unit and the color acquisition unit and is used for controlling the liquid inlet unit to extract the absorbent from the carbon capture device and acquiring the mass of the absorbent; controlling the titration unit to dropwise add a titration indicator into the reaction unit to form a first mixed solution, and dropwise adding a titrant into the first mixed solution to form a second mixed solution; under the condition that the difference value between the first color value and the second color value is greater than a set difference value, controlling the titration unit to stop titration, and obtaining the volume of the titration agent; determining the amine concentration