Universal Model of a Biomass Gasifier for Different Syngas Compositions

摘要

This paper presents the theoretical and technical characteristics of biomass gasifiers. The modelling of a gasifier requires a linear system of equations that represents the mass and energy balances of the gasifier. Three variations with regard to a different syngas composition or the technology used are discussed. To analyse the energy system in full detail, all the peripheral units had to be modelled: the mill, the drying house, the oxygen production facility and the gas engine. The IPSEpro commercial code was used for gasifier and energy system modelling. A mathematical model of the complex energy system was used for the parametrical analysis of the biomass moisture, the biomass composition, the outlet syngas temperature and the operating regime's influence on the exergetic system efficiency. The results are shown in appropriate diagrams and are compared to the operating experience.