Abstract
The paper discusses the technologies of reducing the concentration of nitrogen oxides in the exhaust flue gases during the combustion of coal in the boiler units of power plants that produce heat and electrical energy. According to the results of the analysis, the influence of the method of oxidizing gaseous nitrogen oxides on the efficiency of the treatment plant was revealed. It has been established that during the reconstruction of the gas cleaning system, the advantage is in the technology in which, at the first stage, a gaseous oxidizer is added to the gas flow to convert nitric oxide into heavier water-soluble compounds. At the second stage, an aqueous solution of alkali metal compounds or ammonia is injected into the gas mixture for chemical bonding of the products of oxidation reactions. Thus, this technology allows reducing the concentration of nitrogen oxides in flue gases by 90–95% and meeting the requirements of regulatory documents on emissions of pollutants into the environment. Bibl. 11, Fig. 4, Tab. 5.
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