Abstract:
This thesis concerns with a study on co-firing behavior in pulverized burner of torrefied bamboo, rubber wood and their blends. Firstly, work was carried out on weightloss behavior with temperature under Thermogravimetric analysis (TGA) for torrefied bamboo (TB), rubber wood (RW) and their blends with ratios TB90:RW10, TB80:RW20 and TB70:RW30. The propose was to determine the ignition temperature, peak temperature, and burnout temperature. It was found that the ignition temperature of rubber wood, torrefied bamboo and their blends with ratio TB90:RW10 TB80:RW20 and TB70:RW30 were 262.4, 270.6 267.2, 265.2 and 263.5 degree Celsius respectively. Secondly, work was done on on co-firing behavior in pulverized burner with the aid of Computation fluid dynamics (CFD). The fuel used in this case was a blend of torrefied bamboo and rubber wood with ratios of TB70:RW30 and TB50:RW50. The results showed the vector of velocity, temperature distribution and mass faction of volatile and oxide of surfur. From the result of devolatilization and its Combustion with air in the pre-chamber. Thirdly, Work was concerned with co-firing behavior in pulverized burner in which temperature in pre-chamber and main chamber and Emission from the exhaust gas can be measured from the semi-industrial scale unit. The results showed that the flame front of co-firing of TB50:RW50 was nearless to burner than TE>70:RW30. The temperature in a pre-chamber of TB70:RW30 and TB50:RW50 was 950 and 1050 degree Celsius respectively. The emissions of CO from exhaust in case of TE>50:RW50 is 175 PPM more than the case of TE>70:RW30 that can be collected at 80 PPM. The emissions of NOx from exhaust gas of the both case of ratio blend (TB70:RW30 and TB50:RW50) was similar at 300 PPM and that was lower than the limit of Pollution Management of Thailand.