Method for eliminating nitrogen oxide and sulfur oxide from gas stream of thermal power plant, involves washing gas stream with strong oxidant in liquid phase, and purging aqueous solution that contains sulfuric acid and nitric acid

摘要

The method involves washing gas stream (1) i.e. stream of oxy-combustion fumes, with strong oxidant i.e. hydrogen peroxide, in liquid phase to eliminate a portion of nitrogen oxide and a portion of sulfur oxide in a simultaneous manner, and purging aqueous solution that contains sulfuric acid and nitric acid. Washing of the gas stream is carried out in a gas or liquid contactor i.e. trimmed washing column, at temperature of 40-80 degree Celsius. An independent claim is also included for a device for eliminating nitrogen oxide and sulfur oxide from a gas stream, comprising a gas or liquid contactor.