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Influence of chemical composition of biomass on agglomeration process in fluidized bed of boiler E-75-3,9-440 DFT

A.P. Terekhin, P.A. Maryandyshev, V.K. Lyubov

Vestnik IGEU, 2024 issue 1, pp. 20—27

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Abstract in English: 

Background. The combustion of biofuels in the fluidized bed is an attractive technology to process biomass. However, the technology of biomass combustion in fluidize beds is characterized by several problems associated with the agglomeration of bed material. The aim of the research is to study the influence of the chemical composition of biomass on the agglomeration process of the fluidized bed of the boiler unit E-75-3,9-440 DFT. The boiler burns a mixture of by-products of pulp and paper production to increase stability of the fluidized bed and the duration of boiler operation between periods of its deslagging.

Materials and methods. The study has tested two types of biomass burned in a mixture in a steam boiler unit E-75-3,9-440 DFT with a fluidized bed. The authors also have studied the samples of agglomerates, bed, and fly ash to find out more about the agglomeration process.

Results. The elemental composition of samples of bark-wood waste, sewage sludge, agglomerates and ash has been studied. Elements affecting the process of agglomeration of the fluidized bed have been identified. The results of the analysis have showed that essential ash- and slag-forming components in the sewage sludge are silicon, calcium, sulfur, and potassium, and in the bark wood waste the essential ash- and slag-forming components are calcium, potassium, and sodium. The main elements influencing the process of agglomeration of the fluidized bed are alkaline elements of potassium and sodium.

Conclusion. The results obtained make it possible to predict the agglomeration of the fluidized bed, to select the fuel mixture in the proportion necessary to reduce the agglomeration process.

References in English: 

1. Yu, J., Wang, S., Luo, K., Li, D., Fan, J. Study of biomass gasification in an industrial-scale dual circulating fluidized bed (DCFB) using the Eulerian-Lagrangian method. Particuology, 2023, vol. 83, pp. 156–168.

2. Song, H., Yang, G., Xue, P., Li, Y., Zou, J., Wang, S., Yang, H., Chen, H. Recent development of biomass gasification for H2 rich gas production. Applications in Energy and Combustion Science, 2022, vol. 10, p. 100059.

3. Wang, L., Weller, C.L., Jones, D.D., Hanna, M.A. Contemporary issues in thermal gasification of biomass and its application to electricity and fuel production. Biomass Bioenergy, 2008, vol. 32, p. 57381.

4. Alabdralameer, H., Pikkarainer, T., Taylor, M., Skoulou, V. Big problem, little answer: overcoming bed agglomeration and rector slagging during the gasification of barley straw under continuous operation. Sustain Energy Fuels, 2020, vol. 4, p. 376472.

5. Basu, P. Biomass gasification, pyrolysis and torrefaction, second edition. UK: Academic Press, 2013.

6. Chaivatamaset, P., Tia, S., Methaviriyasilp, W., Pumisampran, W. Bed particle agglomeration and defluidization in the rubber wood and coir-fired fluidized beds. Waste Biomass Valorization, 2019, vol. 10, p. 345770.

7. Ryabov, G.A., Litun, D.S. Agglomeration during combustion and gasification of fuels in a fluidized bed. Thermal Engineering, 2019, no. 9, pp. 42–59.

8. Furuvik, N.C.I.S., Wang, L., Jaiswal, R., Thapa, R., Eikeland, M.S., Moldestad, B.M.E. Experimental study and SEM-EDS analysis of agglomerates from gasification of biomass in fluidized beds. Energy, 2022, vol. 252, p. 124034.

9. Royo, J., Canalís, P., Quintana, D. Chemical study of bottom ash sintering in combustion of pelletized residual agricultural biomass. Fuel, 2022, vol. 310, p. 122145.

10. Capela, M.N., Tobaldi, D.M., Seabra, M.P., Tarelho, L.A.C., Labrincha, J.A. Characterization of ashes produced from different biomass fuels used in combustion systems in a pulp and paper industry towards its recycling. Biomass and Bioenergy, 2022, vol. 166, p. 106598.

11. Nascimento, R.F., Ávila, M.F., Taranto, O.P., Kurozawa, L.E. Agglomeration in fluidized bed: Bibliometric analysis, a review, and future perspectives. Powder Technology, 2022, vol. 406, p. 117597.

12. Nascimento, F.R.M., González, A.M., Silva Lora, E.E., Ratner, A., Escobar Palacio, J.C., Reinaldo, R. Bench-scale bubbling fluidized bed systems around the world – Bed agglomeration and collapse: A comprehensive review. International Journal of Hydrogen Energy, 2021, vol. 46(36), pp. 18740–18766.

13. Kim, J.-W., Jeong, Y.-S., Kim, J.-S. Bubbling fluidized bed biomass gasification using a two-stage process at 600 °C: A way to avoid bed agglomeration. Energy, 2022, vol. 250, p. 123882.

14. Nisamaneenate, J., Atong, D., Seemen, A., Sricharoenchaikul, V. Mitigating bed agglomeration in a fluidized bed gasifier operating on rice straw. Energy Reports, 2020, vol. 6, pp. 275–285.

15. Moradian, F., Tchoffor, P.A., Davidsson, K.O., Pettersson, A., Backman, R. Thermodynamic equilibrium prediction of bed agglomeration tendency in dual fluidized-bed gasification of forest residues. Fuel Processing Technology, 2016, vol. 154, pp. 82–90.

16. Jnadacka, J., Ochodek, T., Malcho, M., Kolonicny, J., Holubcik, M. The increase of silver grass ash melting temperature using additives. Int J Renew Energy Resour, 2015, vol. 5(1).

17. Mlonka-Medrala, A., Magdziarz, A., Gajek, M., Nowinska, K., Nowak, W. Alkali metals association in biomass and their impact on ash melting behaviour. Fuel, 2020, vol. 261, p. 116421.

18. Morris, J.D., Daood, S.S., Nimmo, W. The use of kaolin and dolomite bed additives as an agglomeration mitigation method for wheat straw and miscanthus biomass fuels in a pilot-scale fluidized bed combustor. Renewable Energy, 2022, vol. 196, pp. 749–762.

19. Gu, C., Zhao, H., Xu, B., Yang, J., Zhang, J., Du, M., Liu, Y., Tikhankin, D., Yuan, Z. CFD-DEM simulation of distribution and agglomeration characteristics of bendable chain-like biomass particles in a fluidized bed reactor. Fuel, 2023, vol. 340, p. 127570.

20. Gao, W., Zhang, M., Wu, H. Bed agglomeration during fast pyrolysis of bio-oil derived fuels in a fluidized-bed reactor. Fuel, 2022, vol. 328, p. 125359.

21. Singhal, A., Konttinen, J., Joronen, T. Effect of different washing parameters on the fuel properties and elemental composition of wheat straw in water-washing pre-treatment. Part 1: Effect of washing duration and biomass size. Fuel, 2021, vol. 292, p. 120206.

22. Tarelho, L.A.C., Teixeira, E.R., Silva, D.F.R., Modolo, R.C.E., Labrincha, J.A., Rocha, F. Characteristics of distinct ash flows in a biomass thermal power plant with bubbling fluidised bed combustor. Energy, 2015, vol. 90, pp. 387–402.

23. García, R., Pizarro, C., ´Alvarez, A., Lavín, A.G., Bueno, J.L. Study of biomass combustion wastes. Fuel, 2015, vol. 148, pp. 152–159.

Key words in Russian: 
биомасса, донная зола, летучая зола, газификация, агломерация кипящего слоя, рентгенофлуоресцентный анализ образцов
Key words in English: 
biomass, bed ash, fly ash, gasification, agglomeration of fluidized bed, X-ray fluorescence analysis
The DOI index: 
10.17588/2072-2672.2024.1.020-027
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