CONVERSION OF LOW AND MEDIUM POWER BOILERS FOR COMBUSTION OF SOLID FUEL BIOMASS

  • M.V. Cherniavskyi Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv
  • Ye.S. Miroshnychenko Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv
  • O.Yu. Provalov Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv
Keywords: coal, fuel biomass, boiler unit, dense bed combustion, heat perception, CHP, reconstruction

Abstract

The paper analyzes the existing fleet and the possibilities of replacing anthracite and natural gas boilers of low and medium capacity and substantiates that the reconstruction with conversion to biomass is appropriate for boilers with a thermal capacity of more than 5 MW. The main problem is the reduction of heat perception of furnace screens and increase of heat removal to the convective pass due to the increased specific yield of biomass combustion products. Based on the analysis of changes in the nature of combustion processes and redistribution of heat exchange in the boiler, it was determined the criteria for the possibility of converting boilers from fossil fuels to biomass with maximum use of available equipment and the most acceptable fuel for this - agricultural pellets and wood waste. Technical solutions for the reconstruction of a boiler with a dense bed with a steam capacity of 20 t/h on anthracite (24 t/h on natural gas) have been developed and calculated with transfer to burning of granules of biomass and/or gas coal without change of dimensions of a fire chamber and without loss of thermal power due to compensation of the lowered heat absorption of a fire chamber by increase of a surface of a water economizer with corresponding decrease in an air heater. Technical solutions were used during the reconstruction of 4 boilers "Babcock-Wilcox" of Khorostkiv Sugar Plant. Co-combustion of biofuel pellets with coal is implemented in the range of components share from 0 to 100%. When burning granules, underburning in the fly ash is almost absent, ash deposits on convective surfaces are self-cleaning for several hours of work on gas coal. The solutions developed allowed to solve the problem of renovation of old boilers with the expansion of their fuel base and improvement of environmental performance through the use of biomass. Bibl. 18, Fig. 3, Tab. 4.

Author Biographies

M.V. Cherniavskyi, Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv

Doctor of Technical Sciences

O.Yu. Provalov, Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv

Candidate of Technical Sciences

References

Lavrentsov E.M., Sigal I.Ya., Smikhula A.V., Sigal A.I., Kuchin G.P., Skripko V.Ya., Bykorez V.I. [Reconstruction and modernization of hot water and steam boilers of heating systems of heat supply (Re-view)]. Ecotechnologii i Resursosberezhenie. [Ecotechnologies and Resource Saving]. 2012. No. 3. pp. 63–71. (Rus.)

Bilodid V.D. [Production and consumption of thermal energy in Ukraine in 2005–2013]. Problemy zahalʹnoyi enerhetyky. [Problems of general energy]. 2015. Iss. 1. pp. 39–46. (Ukr.)

Geletukha G.G., Zhelezna T.A. [State and pro-spects of bioenergy development in Ukraine]. Promyslova teplotekhnika. [Industrial heat engineering]. 2017. 39 (2). pp. 60–64. (Ukr.)

Batalova O.A., Kasenich M.I. [Research of the Ukrainian market of industrial boilers]. Efektyvna ekonomika. [Effective economy]. 2014. No. 8. — http://www.economy.nayka.com.ua/?op=1&z=3258 (Ukr.)

Perea-Moreno M.-A., Sameron-Manzano E., Perea-Moreno A.-J. Biomass as Renewable Energy: Worldwide Research Trends. Sustainability. 2019, 11 (3), pp. 863. — https://doi.org/10.3390/su11030863

Rokni E., Ren X., Panahi A., Levendis Y.A. Emissions of SO2, NOx, CO2, and HCl from Co-firing of coals with raw and torrefied biomass fuels. Fuel. 2018, Vol. 211. pp. 363–374. — https://doi.org/10.1016 /j.fuel.2017.09.049

Kang S., Selosse S., Maizi N. Contribution of global GHG reduction pledges to bioenergy expansion. Biomass and Bioenergy. 2018. Vol. 111. pp. 142–153. — https://doi.org/10.1016/j.biombioe.2017.05.017

Geletukha G.G., Zhovmir M.M., Oliynyk E.M., Radchenko S.V. [Biomass as a fuel raw material]. Promyslova teplotekhnika. [Industrial heat engineer-ing]. 2011. 33 (5). pp. 76–84. (Ukr.)

Matviychuk O.S., Rudavina O.V., Chernyavsky M.V. [Experimental study of physicochemical and thermal properties of straw and husk as a solid biofuel], Vidnovlyuvana enerhetyka. [Renewable energy]. 2012. No. 1. pp. 58–66. (Ukr.)

Dunaievska N., Chernyavskiy M., Shchudlo T. Co-combustion of solid biomass in pulverized anthracite-coal firing boilers. Ukrainian Food Journal. 2016. Vol. 5. Iss. 4. pp. 748–764. DOI: 10.24263/2304-974X-2016-5-4-14

Alexandrov V.G. [Steam boilers of small and medium power]. Leningrad : Energiya, 1972. 200 p. (Rus.)

Buchmayr M., Gruber J., Hargassner M., Hochenauer C. Experimental investigation of the primary combustion zone during staged combustion of wood-chips in a commercial small-scale boiler. Biomass and Bioenergy. 2015. Vol. 81. pp. 356–363. — https://doi.org /10.1016/j.biombioe.2015.07.016

Gomez M., Porterio J., de la Cuesta D., Patino D., Migues J.L. Numerical simulation of the combustion process of a pellet-drop-feed boiler. Fuel. 2016. Vol. 184. pp. 987–999. — https://doi.org/10.1016/j.fuel.2015.11.082

Alekhnovich A.A. Current research on the slagging properties of coals and slagging in boilers. Power Technol. Eng. 2012. No. 45. pp. 441–446. — https:// doi.org/10.1007/s10749-012-0291-3

Pat. 143012 Ukraine, IPC F 23 C 1/00, 7/00. [Method for conversion of anthracite steam boiler for combustion of solid biofuel and/or bituminous coal]. E.S.Miroshnichenko, M.V.Chernyavskyy, A.I.Roskolupa. No. u201912050, application 19.12.2019, publ. 10.07.2020, Bull. 13. (Ukr.)

Miroshnichenko E.S., Chernyavskyy N.V., Du-naevskaya N.I. [Experience of reconstruction of boiler units of thermal power plants and combined heat and power plants in Ukraine and possibilities of its use in the conditions of the Republic of Kazakhstan]. Intern. Conf. «Ugol'naya teploenergetika v Kazakhstane : Problemy. Resheniya. Perspektivy razvitiya» [“Coal power engineering in Kazakhstan : Problems. Solutions. Development prospects”], Nur-Sultan, 27–28.02.2020, pp. 62–66. — URI: http://nur.nu.edu.kz/handle/123456789 /4938 (Rus.)

[Thermal calculation of boilers (Standard method)]. Ed. G.M.Kagan. St. Petersburg : JSC “VTI”, NPO CKTI, 1998. 259 p. (Rus.)

[Thermal calculation of industrial steam generators]. Ed. V.I.Chastukhin. Kiev : Vishcha shkola, 1980. 182 p. (Rus.)

Published
2021-03-20
How to Cite
Cherniavskyi, M., Miroshnychenko, Y., & Provalov, O. (2021). CONVERSION OF LOW AND MEDIUM POWER BOILERS FOR COMBUSTION OF SOLID FUEL BIOMASS. Energy Technologies & Resource Saving, (1), 71-80. https://doi.org/10.33070/etars.1.2021.08
Section
Equipment and devices