REVIEW OF TECHNOLOGIES FOR REDUCING OF NITROGEN OXIDES EMISSIONS ON COAL-FIRED POWER PLANTS
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.
Directive 2010/75/EU of the European Parliament and of the Council of 24 November 2010 on industrial emissions (integrated pollution prevention and control) (Recast). Official Journal L334. 2010. pp. 17–119.
[Order of the Cabinet of Ministers of Ukraine «On the Implementation of the Association Agreement between Ukraine, on the One Hand, and the European Union, the European Atomic Energy Community and their Member States, on the Other Hand» from 09/17/2014 No.847-r. «Urjadovyj kur’jer» from 10/08/2014. No.185. (Ukr.)
Ministry of Ecology and Natural Resources of Ukraine from 10/22/2008 No. 541. «On Approving the Technological Norms for Permitted Emissions of Pollutants from Heat-Power Installations, the Rated Thermal Power of which Exceeds 50 MW». — http://zakon2.rada. gov.ua/ laws/ show/z1110-08/. (Ukr.)
EPA Air Pollution Control Cost Manual. EPA/452/B-02-001: Section 4 — NOx Controls. Chapter 2 — Selective Catalytic Reduction. Official site. 2016. pp. 2–108. — https://www3. epa.gov/ttn/ecas/docs/SCRCostManualchapter7thEdition_2016.pdf
EPA Air Pollution Control Cost Manual. EPA/452/B-02-001: Section 4 — NOx Controls. Chapter 1 — Selective Noncatalytic Reduction. Official site. 2016. pp. 1–70. — https://www3.epa. gov/ttn/ecas/ docs/SNCRCostManualchapter7thEdition2016.pdf
Harrison S. NOx reduction: Latest trends and thinking. Power Engineering International. 2016. Vol. 24. Iss. 3.
NIST Chemical Kinetics Database, NIST Standard Reference Database 17, Version 7.0 (Web Version), Release 1.6.8, Data version 2015.09 / J.A.Manion, R.E.Huie, R.D.Levin and etc. — National Institute of Standards and Technology, Gaithersburg, Maryland, 20899-8320. — http://kinetics.nist.gov/
Chen Z., Mathur V.K. Nonthermal Plasma for Gaseous Pollution Control. Industrial & Engineering Chemistry Research. 2020. 41 (9). pp. 2082–2089.
Kwon Y.K., Han D.H. Microwave Effect in the Simultaneous Removal of NOx and SO2 under Electron Beam Irradiation and Kinetic Investigation of NOx Removal Rate. Industrial & Engineering Chemistry Research. 2010. 49 (17). pp. 8147–8156.
Gurvich L.V., Vejc I.V., Medvedev V.A. i dr. Thermodynamic properties of individual substances : Reference edition in four volumes. Мoscow : Nauka, 1978–1982. (Rus.)
Dean J.A. Lange’s Handbook of Chemistry. McGraw-Hill, 1999. 1291 p.