Estimation Complete Combustion Coefficient in Rotary Kilns

Janusz Bujak, Piotr Sitarz, Krzysztof Bujak, Sebastian Majkowski and Rafał Pasela
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Janusz Bujak: Faculty of Environmental Engineering, Bydgoszcz University of Science and Technology, Kaliskiego 7, 85-796 Bydgoszcz, Poland
Piotr Sitarz: PPM PROMONT Bujak Sp. z o.o., Sp. K., Jagiellońska 35, 85-097 Bydgoszcz, Poland
Krzysztof Bujak: PPM PROMONT Bujak Sp. z o.o., Sp. K., Jagiellońska 35, 85-097 Bydgoszcz, Poland
Sebastian Majkowski: PPM PROMONT Bujak Sp. z o.o., Sp. K., Jagiellońska 35, 85-097 Bydgoszcz, Poland
Rafał Pasela: Faculty of Environmental Engineering, Bydgoszcz University of Science and Technology, Kaliskiego 7, 85-796 Bydgoszcz, Poland

Energies, 2022, vol. 15, issue 3, 1-11

Abstract: This paper presents a model-based analysis of variability of thermodynamic and chemical parameters in a rotary kiln (RK) during thermal treatment of animal waste. The core process of chemical treatment of waste takes place in RKs; the process involves heating, gasification and partial combustion of the waste. Control over these parameters, and especially the level of complete combustion, determines the quality and efficiency of the process. In operational practice, control and analysis of the variability of process parameters is complicated by the high degree of simultaneity of individual transformations, random disruptions of the process and metrological difficulties resulting from high temperature and chemical activity of the materials being processed. The purpose of preparing the model was to obtain a tool for predicting variability of selected process parameters. By definition, model calculations assume no influence of disturbances on output values, which makes it possible to acquire accurate results that can be compared with corresponding empirically obtained data. The result of the analyses conducted is a theoretical model of the analysed process and a graphical presentation of the calculation results in the form of graphs and charts. A formula for calculating the level of complete combustion and the results of calculation of this index on the basis of empirical data from an industrial waste incineration plant are also presented herein. The presented model is a useful tool providing an insight into interdependencies between selected process parameters and facilitating design of corrective actions oriented towards process optimisation.

Keywords: waste thermal treatment; rotary kiln; parameter predictions; process model (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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