Biomass gasification apparatus

A biomass gasification apparatus, comprising:

• a gasification reaction furnace;
• an upper supply unit configured to supply woody biomass and inert gas from above through a feeding hole to the gasification reaction furnace;
• a lower supply unit configured to supply mixed gas containing the inert gas from below to the gasification reaction furnace;
• a sensor configured to detect a clogged state in which the woody biomass is clogged in the feeding hole;
• and
• a controller configured to control the upper supply unit and the lower supply unit to regulate an upper flow rate of the inert gas supplied by the upper supply unit and a lower flow rate of the inert gas supplied by the lower supply unit based on a detection result by the sensor, wherein
• when the clogged state is detected by the sensor, the controller increases the upper flow rate to be higher than a first flow rate and decreases the lower flow rate to be lower than a second flow rate so that a sum of the upper flow rate and the lower flow rate is maintained at a predetermined flow rate.