Biomass gasification furnace and methanol synthesis system making use of gas produced through biomass gasification

摘要

Methanol is synthesized from a gas produced through gasification of biomass serving as a raw material, making use of a biomass feeding means for feeding biomass into the main body of a furnace and, located above the biomass feeding means, combustion-oxidizing-agent-feeding means for feeding into the furnace main body a combustion-oxidizing agent containing oxygen or a mixture of oxygen and steam is disclosed, wherein the methanol synthesis system making use of gas produced through biomass gasification comprises: a biomass gasification furnace for gasifying biomass as a raw material; a gas purification unit for purifying the gas generated in the gasification furnace; and a methanol synthesis unit for synthesizing methanol from H2 and CO contained in the resultant purified gas; wherein the biomass gasification furnace comprises: means for feeding pulverized biomass having an average particle size (D) falling within a range of 0.05 d" D d" 5 mm and combustion-oxidizing-agent-feeding means for feeding oxygen or a mixture of oxygen and steam serving as a combustion-oxidizing agent, whereby gasification of the biomass is performed under gasification conditions that the mol ratio of oxygen [O2]/carbon [C] in the biomass gasification furnace falls within the range 0.1 d" O2/C 1.0, the mol ratio of steam [H2O]/carbon [C] falls within the range 1 d" H2O/C; and the furnace interior temperature is between 700°C-1,200°C.