Combustion characteristics of different pulverized biomasses in small scale flames

The objective of this thesis is to establish a fundamental basis for further research and within the field of biomass usage and burning. In this thesis, an overview of biomass as renewable energy source and measurements in small scale flames and ash deposit formation during firing of several biomass sources have been made. The pulverized biomass is transported pneumatically to the burner in an air stream coming from an air injector. The burner maximum fuel input is 50 kw. The reactor consists of a vertical cylindrical combustion chamber which has approximately 1100 oC temperature that is fired from the top. It is divided in radiative section made of a refractory material and convection section made of a carbon steel. A direct quench system is also installed to cool down the offgas to about 180 oC by help of pressurized air. After the combustion of biomasses, examples of ash deposits are taken and several tests and analyses are done to be able to get information of combustion and fuel characteristics.