Abstract
This study examined to accomplish low-emission and high-efficiency combustion in the bark boiler. The bark which is the fuel of the bark boiler contains much water and it has a big influence on combustion. Therefore combustion of low-emission and high-efficiency is enabled to dry the bark appropriately. In this study, it made a model using the numerical simulation and simulated a combustion state of the bark boiler. It was replaced by a methane gas fuel the bark of solid fuel and adjusting chemical reaction rates and the amount of methane gas.