Vol.06. Nos.1 - 2 (2007) pp.71-79
Title:

A bamboo charcoal production method to reduce cycle time and increase yield

Authors:Muti Lin Jeng Chyan

Abstract:This study reports a new carbonisation process to reduce the cycle time and increase the yield for mass production of bamboo charcoal. Conventional Japanese Schwartz type earth mound bamboo kiln uses solid biomass incineration to generate heat to reach carbonisation stage and then some of the bamboo charge in the kiln to further raise the temperature. This method takes long cycle time and is low in charcoal yield. In the current study, the syngas generated from the updraught [updraft] fixed bed gasifier is fully burnt in the embedded combustor. This design results in very high temperature and virtually oxygen free flue gas from solid biomass. The hot and reductive flue gas is forced to circulate in the kiln to carbonize the bamboo. Temperature distribution in the kiln is found to be uniform. All the bamboos in the kiln are converted into high quality charcoal with high fixed carbon. The charcoal yield consequently increased by more than 10 per cent. The carbonisation time is effectively reduced to 8 h compared to the conventional 240 h.

Keywords:bamboos; charcoal; combustion; kiln drying; temperature.

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