Biomass grate furnace

Fig. 8.10 2D predicted profiles of (a) mean mixture fraction, (b) mean temperature and (c) mean NO mass fraction for the biomass grate furnace. 

The present research has treated important parts of the modeling of combustion and NOx formation in a biomass grate furnace. All parts resulted in useful approaches. For all these approaches successful first steps were taken. Currently, more research is underway to obtain improved results NH3 production is measured in the grid reactor with the tunable diode laser, detailed kinetics will be attached to the front propagation model, including the measured NH3 release functionalities, and for the turbulent combustion model heat losses are taken into account. In addition, the fuel layer model has to be coupled to the turbulent combustion model in the furnace. 

Scharler, R., Fleckl, T., Obernberger, I. Modification of a Magnussen constant of the Eddy Dissipation Model for biomass grate furnaces by means of hot gas in-situ FT-IR absorption spectroscopy,... 

Thermal Biomass Conversion and NOx Emissions in Grate Furnaces... 

A popular small-scale thermal biomass conversion method is combustion in grate furnaces. To meet the emission regulations for such a furnace, the operating conditions and design of the furnace have to be chosen carefully. Numerical models, known as computational fluid dynamics (CFD), can support the making of these choices, provided that accurate sub-models for the phenomena occurring in the oven are available. 

Albrecht, B.A., Bastiaans, R.J.M., van Oijen, J.A., de Goey, L.P.H. NOx emissions modelling in biomass combustion grate furnaces, in Proceeding of the 7th European Conference on Industial Furnaces and Boilers (INFUB ), Reis, A., Ward, J., Leuckel, W., (Eds.), Porto, Portugal, ISBN 972-99309-1-0, (2006). 

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