RESEARCH OF BURNING OF AGRICULTURAL PELLETS IN BOILERS WITH CAPACITY UP TO 25 kW
The main purpose of this research is to determine the main dependence’s of the agricultural pellets combustion process and to study the influence of regime parameters on the distribution of temperatures in the combustion chamber, as well as to analyze the biofuels productivity characteristics.
Research methods: experimental and theoretical.
Results. The research of biofuel combustion process was carried out at the experimental facility of solid fuel boiler with a pellet burner for a passive type house heating. During experimental researches samples of wood pellets, rapeseed pellets and beets pulp were used. On the received graphs the changes in the temperature state of the combustion chamber at the stage of pelletʼs ignition, burning and fading were reflected. It was found that the largest increase in temperature occurs near the wall of the boiler, which is opposite to the burner. As can be seen on the graphs, temperature fluctuations occur as a result of the periodic burning of biofuel in the burner and the arrival of a new portion of pellet from the hopper. As the experiments showed, the temperature level at burning of rapeseed pellets is much lower than in comparison with wood pellets, and to go to the established mode of burning of beet pulp pellets is generally problematic. It is obvious that when setting up the fuel supply system and modes of operation of the fuel it is necessary to take into account heat physical characteristics of fuel, first of all moisture and heat capacity, as well as yield of volatile combustible components. For this purpose, a gas analysis was carried out when burning wood pellets. The selection of combustion products was done in the wild immediately after the boiler. As a result, the NOx and CO concentrations of the appropriate temperature were obtained at the sample site. The nitrogen oxide concentrations should be considered moderate, which cannot be argued about the concentration of carbon monoxide, which requires further research. The obtained results can be used to increase the efficiency of combustion process at burning biofuel in boilers of low power communal and industrial heat power, social-budget sphere and individual-household sector.
2. Andreu A., Calderoni M., Cremenescu C., Madani H., Pearson D., Rutz D., Schmitt B., Schmidt R., Skeiberg О., Urchueguia J., Van Helden W., Wilis M. 2050 vision for 100% renewable heating and cooling in Europe. RHC-Platform; 2019.
3. Boström C.-E., Gerde P., Hanberg A, Jernström B., Johansson C., Kyrklund T., Rannug A., Törnqvis M., Victorin K., Westerholm R.. Cancer risk assessment, indicators, and guidelines for polycyclic aromatic hydrocarbons in the ambient air. Environ Health Perspect. 2002. V. 110. P. 451-488. DOI: 10.1289/ehp.110-1241197
4. Timothy V. Larson and Jane Q. Koenig. Wood smoke: emissions and noncancer respiratory effects. Annu. Rev. Public Health. 1994; 15. P. 133-156.
5. Cosic B., Stanic Z., Duic N. Geographic distribution of economic potential of agricultural and forest biomass residual for energy use: case study Croatia. Energy. 2011. 36(4). P. 2017-2028. DOI:10.1016/j.energy.2010.10.009
6. Horvat I., Dovic D., Filipoviс P. Numerical and experimental methods in development of the novel biomass combustion system concept for wood and agro pellets. Energy. 2021. V. 231. P. 1-17. https://doi.org/10.1016/j.energy.2021.120929
7. Kraiem N., Lajili M., Limousy L., Said R., Jeguirim M. Energy recovery from Tunisian agri-food wastes: evaluation of combustion performance and emissions characteristics of green pellets prepared from tomato residues and grape marc. Energy. 2016. V. 107. P. 409-418. DOI:10.1016/j.energy.2016.04.037
8. Roy M., Dutta A., Corscadden K. An experimental study of combustion and emissions of biomass pellets in a prototype pellet furnace. Applied Energy. 2013. V. 108. P. 298-307. DOI:10.1016/j.apenergy.2013.03.044
9. Diaz-Ramirez M., Sebastian F., Royo J., Rezeau A. Influencing factors on NOX emission level during grate conversion of three pelletized energy crops. Applied Energy. 2014. V. 115. P. 360-373. DOI: 10.1016/j.apenergy.2013.11.011
10. Lajili M., Jeguirim M., Kraiem N., Limousy L. Performance of a household boiler fed with agropellets blended from olive mill solid waste and pine sawdust. Fuel. 2015. V. 153. P. 431-436.
11. EN 303-5:2021. Heating boilers – Part 5: Heating boilers for solid fuels, manually and automatically stoked, nominal heat output of up to 500 kW – Terminology, requirements, testing and marking.
12. Horvat I., Dovic D., Filipovic P. Laboratory testing of domestic hot water boiler while fired with different biomass pellets. 13th Conference on sustainable development of energy, water and environment systems. Palermo, Italy. 2018.
13. Basok B., Veremiichuk A., Baranyuk O., Siruy O. Simulation of biopellet combustion process in low power boilers. Actual problems of renewable energy, construction and environmental engineering, Kielce. 2021. P. 141-144.
14. Basok B., Davydenko B., Kuzhel L., Lysenko O., Veremiichuk A. Eksperymentalni doslidzhennia spaliuvannia roslynnykh pelet u pobutovomu kotli [Experimental studies of burning plant pellets in a domestic boiler], Ventyliatsiia, osvitlennia ta teplohazopostachannia [Ventilation, Illumination and Heat-Gas Supply]. 2021. V. 37. P. 13-23. https://doi.org/10.32347/2409-2606.2021.37.13-23 (in Ukr.),
15. Basok B., Goncharuk S., Priemchenko V., Lysenko O., Veremiichuk H. Doslidzhennia teplotekhnichnykh kharakterystyk roboty pobutovoho kotla z mekhanichnym peletnym palnykom [Research of thermotechnical characteristics of domestic boiler with a mechanical pellet burner], Ekolohichna bezpeka ta pryrodokorystuvannia [Environmental safety and natural resources]. 2021. № 4 (40). P 60-72. DOI: 10.32347/2411-4049.2021.4.60-72 (in Ukr.).
Abstract views: 56 PDF Downloads: 51
If the article is accepted for publication in the journal «Industrial Heat Engineering» the author must sign an agreementon transfer of copyright. The agreement is sent to the postal (original) or e-mail address (scanned copy) of the journal editions.
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License International CC-BY that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.