The Effect of Modification Vertical Partition On--Kiln Drum Performance For Coconut Shell Carbonization

摘要

Coconut shell as an organic residue that could be re-utilized to charcoal raw material through carbonization or pyrolysis process. Kiln is a thermally insulated chamber that produces enough temperatures to complete some process such as carbonization. This study aimed to conduct a performance test of modification drum kiln with vertical partition for coconut shell carbonization. These partitions were added in order to limit the direct contact between coconut shells and husk, thus the temperature inside each chamber can be easier to maintain. The data obtained with placing the thermocouple in five places, while also measure wind velocity, relative humidity and environment. The drum kiln has 6 main components, which are pyrolysis main chamber, initial combustion chamber, air inlet, chimney, unloading and vertical partition. Optimum performance of kiln with vertical partition was in average temperature of 295.67 °C, maximum temperature 531.33 °C, charcoal yield 21.67 - 26.80%, carbonization time 78.33 minute and calorific value of 7,505.33 kcal/kg. Vertical partition able to limit and control kiln temperature also increased pyrolysis rate as well as charcoal yield.