Experimental Study On Biomass Pyrolysis And Bed Combustion Characteristics

Biomass energy is a kind of clean and renewable energy as an effective way tosolve the energy crisis and environmental problems. But its utilization rate is relativelylow, so it has great development potential. With the increasingly serious shortage ofenergy, the effectively use of biomass energy has become one of the effective means tothe problem of energy crisis, and the effective utilization of biomass energy also hasbeen paid more and more attention. As is known to all that gasification and directcombustion are the main means to use biomass energy. This paper selects the directcombustion of biomass energy and focus on the characteristics of several kinds ofbiomass pyrolysis and combustion. Therefore, this paper includes the following severalparts.First of all, for understanding the characteristics of biomass fuel, in this paper wedid element analysis, industrial analysis, ash composition analysis, ash meltingcharacteristics analysis for several kinds of biomass in order to have some preliminaryunderstandings about biomass fuel characteristics.Secondly, in order to analyze the biomass pyrolysis characteristics, several kinds ofbiomass were did the thermogravimetry and TG FTIR analysis. This paper also analysesthe pyrolysis characteristics of the mixture of biomass, using two different models toanalyze the pyrolysis data and attain the kinetics parameter of biomass pyrolysis.Finally, this paper did biomass combustion experiments. In these experiments, weused one dimensional layer burning boiler, and propane as auxiliary gas. During theexperiment, it was found that the primary air temperature and moisture have greatinfluences on biomass layer combustion. In particular conditions (mainly refers to thehigh moisture content and high primary air temperature), biomass might appear thatseveral layers of biomass burns at the same time or the bottom burns before the upper.