ipolytechiPolytech JournaliPolytech Journal2782-40042782-6341Irkutsk National Research Technical University10.21285/1814-3520-2020-5-1159-1167ipolytech-445Research ArticleМЕТАЛЛУРГИЯ И МАТЕРИАЛОВЕДЕНИЕMETALLURGY AND MATERIALS SCIENCEВлияние состава природного газа на тепловой коэффициент полезного действия отражательной печи для никелевых сплавовEffect of natural gas composition on reverberatory furnace thermal efficiency for nickel alloysКирос КабаскангоВ. Э.Quiroz CabascangoV. E.

Кирос Кабасканго Валерия Эстефания, аспирант

199106, г. Санкт-Петербург, 21-я линия В.О., 2

Valeria Esthefanía Quiroz Cabascango, Postgraduate Student

2, 21st Line, St. Petersburg 199106

valeritae111@mail.ruСанкт-Петербургский горный университетРоссияSt. Petersburg Mining UniversityRussian Federation20201311202024511591167Copyright © Кирос Кабасканго В.Э., 20202020Кирос Кабасканго В.Э.Quiroz Cabascango V.E.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://ipolytech.elpub.ru/jour/article/view/445

Цель – разработать и обосновать принципы энергетической модели промышленной отражательной печи с учетом химического состава и свойств природного газа и рассчитать тепловой коэффициент полезного действия печи для оценки ее производительности в промышленности. Для проведения исследования выполнены математические расчеты на основе данных химического и физического анализа дымовых газов и температуры дымохода с использованием стандартных графиков избытка воздуха и значений энтальпий компонентов дымовых газов. Измерение количества отходящих загрязняющих веществ осуществлялось при помощи газоанализаторов марки MRU Delta 65–3, которые идентифицируют суммарное количество газов (О2, СО, NO, H2S), а также температуру, давление (разряжение), рассчитывают содержание СО2 и коэффициент полезного действия установки. Для проверки математической модели использовалась программа Aspen Hysys. Получены данные о свойствах природного газа: химическом составе, молекулярной массе, теплотворной способности, избытке воздуха при сгорании. Также получены данные о газах сгорания: компонентах сгоревшего газа, молекулярных массах, энтальпии, теплотворной способности, соотношение газов сгорания при температуре от 94°C до 316°C. Приведенные химические реакции горения с количеством молей, необходимых и образующихся для каждой реакции, использованы для расчета теплового коэффициента полезного действия отражательной печи для никелевых сплавов. Расчетные данные подтверждены с помощью программы Aspen Hysys. На основании проведенных исследований было установлено, что переменной, которая имеет наибольшее влияние на величину теплового коэффициента полезного действия, является низкая теплотворная способность, так как она зависит от состава природного газа. Предложенная методика расчета теплового коэффициента полезного действия с использованием компьютерной программы эффективна в случае, если оператор на месте хочет оценить эффективность работы технологической печи.

The purpose of the article is to develop and substantiate the principles of an energy model of an industrial reverberatory furnace taking into account chemical composition and properties of natural gas as well as to calculate the furnace thermal efficiency in order to estimate its industrial performance. To conduct the research mathematical calculations are performed based on the data of chemical and physical analysis of flue gases and chimney temperature using standard graphs of excess air and enthalpy values of flue gas components. The measurement of the amount of waste pollutants is carried out using MRU Delta 65-3 gas analyzers, which identify the total amount of gases (O2, CO, NO, H2S) They determine the temperature, pressure (vacuum), calculate the content of CO2 and installation efficiency as well. Aspen Hysys program is used to verify the mathematical model. The data on the properties of natural gas are obtained i ncluding the data on chemical composition, molecular weight, calorific value, excess air during combustion. The data on flue gases are also obtained, which include the data on the burnt gas components, molecular weights, enthalpy, calorific value, flue gases ratio at the temperatures from 94°C to 316°C. The chemical reactions of combustion given with the number of moles required and formed for each reaction are used to calculate the thermal efficiency of a reverberatory furnace for nickel alloys. The calculated data are confirmed by Aspen Hysys software. Based on the studies conducted, it is found that the variable having the greatest influence on the thermal efficiency is the low calorific value, since it depends on the composition of the natural gas. The proposed methods for calculating the thermal efficiency using a computer program are effective if an operator wants to evaluate the furnace operation efficiency on site.

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The authors declare that there are no conflicts of interest present.