Article
Article name Analysis of Heat Removal Efficiency of Heating Surfaces
Authors Batukhtin A.G. doctor of technical sciences, associate professor, Energy department, batuhtina_ir@mail.ru
Batukhtin S.. ,
Yakubovich A.I. master degree student, TESm-22 group, alexander_yakubovich75@mail.ru
Kuznetsova N.. candidate of biological sciences, assistant professor, kns2702@yandex.ru
Bibliographic description Batukhtin A.G, Batukhtin S. G., Yakubovich A. I., Kuznetsova N. S. Analysis of the heat removal efficiency of heating surfaces // Transbaikal State University Journal. 2023. Vol. 29, no. 4. P. 65–72. DOI: 10.2109/2227- 9245-2023-29-4-65-72.
Category Subsoil Use, Mining Sciences
DOI 536.46; 622.7; 533.6; 522.7
DOI 10.2109/2227-9245-2023-29-4-65-72
Article type Original article
Annotation The study of energy efficiency and energy saving of industrial boiler units, including those used at mining enterprises of the Transbaikal Territory, is an urgent scientific task. The purpose of the work is to study the efficiency of the heating surfaces of boiler units. The following tasks have been consistently solved: assessment of heat transfer on heating surfaces in a convective shaft depending on the flue gas velocity, their volume; identification of the dependence of heat removal of heating surfaces on steam and ampere load. The object of the research is a boiler unit of the BKZ type- 210-140-10. The subject of the study is the characteristics of heating surfaces and their aerodynamic resistance. The main tasks of the study are determined; the dependences of the heat removal from heating surfaces on the steam load, the resistance of the convective shaft and the ampere load of the smoke pumps are studied. The experimental results concerning the study of heat transitions on heating surfaces, heat removal from the initial temperature, ampere load of draft mechanisms, temperature dynamics of exhaust gases and aerodynamic drag behind heating surfaces at superheated steam consumption from 90 to 210 tons/hour are presented. An inversely proportional dependence of the heat transfer on the heating surfaces and the steam flow is established. The reduction of the ampere load on the flue pumps and the exhaust gas flow rate in the convective shaft during unloading of the boiler unit is shown. A decrease in the aerodynamic drag of the convective shaft is determined, which is the result of a decrease in the volume of gases and their velocity. Conclusions are drawn about an increase in the efficiency of heat removal of surfaces with a decrease in the velocity of gases in the convective part of the boiler, which directly depends on the ampere loading of the flue pumps, which is due to a change in the velocity of feed water and air in the heating surfaces that is not proportional to the velocity of gases passing through the convective shaft. It is determined that the lower the velocity of the exhaust gases in the convective shaft, the more efficient the heat transfer in the furnace and the higher the efficiency.
Key words boiler unit, heating surface, temperature, heat removal, steam and ampere load, convective shaft, smoke pump, aerodynamic drag, discharge, exhaust gas temperature
Article information
References 1. Arkhipov M. A., Yurkov D. A. Three-dimensional numerical modeling of the aerodynamics of the boiler combustion chamber under isothermal conditions. Electric Stations, no.11, pp. 17–20, 1999. (In Rus.). 2. Butakov I. N. Efficiency of thermal power plant and energy system. Proceedings of Tomsk Polytechnic University, no. 2, pp. 3–45, 1948. (In Rus.). 3. Vagner A. A. Increasing the reliability, efficiency and environmental efficiency of the BKZ-210-140F boiler when switching to stepwise combustion of Kuznetsk coal in a U-shaped torch. Electric station, no. 5, pp. 17–21, 2004. (In Rus.). 4. Gumerov I. R., Zainullin R. R. Features of the operation of once-through steam boilers and boilers with natural circulation. Theory and practice of modern science, no. 4, pp. 289–292, 2017. (In Rus.). 5. Ershova I. G., Ershov M. A., Poruchikov D. V. Energy-saving systems based on non-traditional energy sources for industrial and infrastructure facilities: monograph. Cheboksary: Chuvash State Pedagogical University Publ., 2016. (In Rus.). 6. Laptev A. G., Nikolaev N. A., M. M. Basharov M. M. Methods of intensification and modeling of heat and mass transfer processes: monograph. Moscow: Teplotechnik, 2011. (In Rus.). 7. Monakova T. I. Analysis of the scheme for using waste heat from thermal power plants using the method of comparing exergy losses. Thermal power engineering, no. 9, pp. 35–37, 1984. (In Rus.). 8. Nozdrenko G. V., Kvrivishvili A. R. Methodology for determining the design and layout parameters of steam power unit equipment. Scientific Bulletin of the Novosibirsk State Technical University, no. 1, pp. 107– 116, 2009. (In Rus.). 9. Seredkin A. A., Batukhtin S. G., Batukhtin A. G. Problems of energy efficiency of heat supply in the Transbaikal Territory: monograph. Chita: Transbaikal State University, 2021. (In Rus.). 10. Trembovlya V. I., Finger E. D., Avdeeva A. A. Thermal testing of boiler installations. Moscow: Energoatomizdat, 1991. (In Rus.). 11. Fairushin R. R., Gafurov A. M. Thermal efficiency coefficient of screens. Theory and practice of modern science, no. 2, pp. 571–574, 2017. (In Rus.). 12. Fomin M. D. Reconstruction of the boiler BKZ-210–140 at the Vladimir CHPP-2. Ivanovo: Ivanovo State Energy University, 2020. (In Rus.). 13. Shelygin B. L., Moshkarin A. V., Malkov E. S. Thermal efficiency of using exhaust gases from a waste heat boiler when burning additional fuel. Bulletin of Ivanovo State Energy University, no. 4, pp. 8–12, 2012. (In Rus.). 14. Shklyarsky Ya. E., Skamin A. N., Jimenez Carrizoza M. Energy efficiency in the mineral resource complex. Notes of the Mining Institute, no. 261, pp. 323–324, 2023. (In Rus,). 15. Batukhtin A., Batukhtina I., Baranovskaya M., Batukhtin S., Kobylkin М. Obtaining a solution of a differential equations system for determining the heat networks retention. International journal of mechanical engineering and technology, vol. 9, no. 7, pp. 1300–1320, 2018. (In Eng.). 16. Mills A. F., Chung D. K. Heat transfer across turbulent falling films. Int. J. Heat Mass Transfer, vol. 16, no. 4, pp. 694, 1973. (In Eng.).
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