Analysis of existing air separation technologies for efficiency increase of fuel combustion in thermal power engineering
Journal Title: Екологічні науки - Year 2018, Vol 21, Issue
Abstract
An analysis of the problems associated with combustion of organic fuels in various industries: metallurgy, heat energy, municipal utilities and other technological processes is conducted. It is stated that in most cases the process of fuel combustion happens with an excess air coefficient exceeding its stoichiometric value. Presence of a significant amount of nitrogen in the air causes nitrogen oxides formation, which by their nature belong to the first class of danger. Thermal power plants are also among such environment pollution sources. An analysis of the processes of air separation into oxygen and nitrogen fraction was conducted to use oxygen-enriched air for intensifying of combustion processes. The processes of formation of nitrogen oxides are endothermic and lead to the overall efficiency decrease of a heat energy object. It is suggested to use the remnants of nitrogen fraction after oxygen withdrawal to form the working body of a gas cycle for electric power generation, to reduce the concentration of nitrogen oxides, volume of flue gases and generally decrease the gross volume of emissions It is shown that from the three most advanced technologies of air separation cryogenic, adsorption and membrane, it is more expedient to use a membrane method. In addition, its use in a combined steam and gas power plant increases maneuverability and mobility of power plants' coal units that operate on domestic coal of poor quality.
Authors and Affiliations
М. П. Кулик, Т. Ю. Кравець, М. М. Семерак
Keywords
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