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SPECIALIZED SOFTWARE FOR FURNACE MODELING
Tepfer E.S., Dekterev A.A., Gavrilov A.A., Kharlamov E.B., Chernetskiy M.Yu.
Institute of Thermophysics SB RAS, Novosibirsk, Russia
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Citation:
Tepfer, E.S., Dekterev, A.A., Gavrilov, A.A., Kharlamov, E.B. and Chernetskiy, M.Yu., (2011) Specialized software for furnace modeling, Modern Science: Researches, Ideas, Results, Technologies, Iss. #3(8), PP. 9 - 12.
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Keywords:simulation; burning coal; furnace; slagging; emissions |
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Abstracts:
The software product designed to simulate the burning of pulverized coal injection into the boilers. The model is based on the Euler/ Lagrange approach for turbulent reacting gas-particle flows with combusting pulverized coal particles. The gas phase is described by Reynolds-averaged conservation equations. The method of control volume on the structured curvilinear non-orthogonal meshes with block technique is used for the numerical implementation of above-mentioned processes. Calculation of volatile fuel components is based on the global irreversible reactions between fuel and oxidant. The motion of coal particles in fluids is described in a Lagrangian approach by solving of a set of ordinary differential equations along the trajectory. Stochastic separated flow (SSF) model is used to describe the particle dispersion. As the particle enters the furnace, vaporization, devolatilization and char combustion processes are considered. The NOx formed in coal combustion consists of thermal NOx, fast NOx and fuel NOx. The empirical model is used to estimate the dynamics of heated surface slagging. Applicability of a comprehensive model has been validated by comparing its predictions with experimental data of laboratory-scale pulverized-coal combustion burner of Siberian Thermal Engineering Institute (SibVTI) and All-Russian Thermal Engineering Institute (VTI). The software product was applied for the simulation of full-scale boilers. The results were compared with experimental data. |
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