Process and apparatus for the reduction of nitrosamines formed by CO2 removal of flue gases by means of an aqueous amine solution

摘要

A method of reducing nitrosamines formed by CO2 removal of flue gases by means of an aqueous amine solution, wherein a portion of the nitrosamine-loaded aqueous amine solution is branched from a scrubbing circuit and concentrated by evaporation of water and low boiling components, the concentrated amine solution at boiling temperature in an apparatus in which a liquid phase and a vapor phase are in contact and a vapor / liquid equilibrium is established between the phases, wherein the vapor phase within the apparatus is irradiated with UV light, which changes into the vapor phase Nitrosamine decomposes, and wherein the concentrated amine solution is recycled after treatment in the apparatus in the washing liquid circuit.