NUMERICAL ESTIMATION OF THERMAL STABILITY BOUNDARIES OF FIXED BED BIOMASS COMBUSTION USING LOCAL CHEMICAL EQUILIBRIUM APPROXIMATION

Igor G. Donskoy

Melentiev Energy Systems Institute, Siberian Branch of the Russian Academy of Sciences

The article investigates the dependence of the stationary combustion temperature of layer combustion of biomass on the feed rate and specific consumption of air blast. For this, the stationary heat balance equation, together with the simplest kinetic equation for a chemical reaction, is solved over a wide range of parameters. For a numerical solution, a number of assumptions are introduced (a narrow reaction zone, preferential heat removal by radiant heat conduction, equilibrium composition of oxidation products). The calculation results give the boundary values of the consumption and stoichiometric parameters at which stable combustion is possible.

: mathematical modelling, fixed bed combustion, thermal stability, thermodynamic modelling

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