The utility model relates to a
biomass fuel semi-gasification
combustion furnace which comprises a
combustion chamber defined by a cylindrical furnace wall, an annular groove type ash basin and a
tower type rotary grate are arranged at the bottom of the
combustion chamber, and a primary air supply
system, a
tower type rotary grate driving
system, a grate ash basin water seal
system and an ash
discharge system are arranged below the
tower type rotary grate. A fuel adding opening is formed in the furnace wall, a
fuel supply system is arranged outside the
combustion chamber, a secondary air supply system for supplying air to the position above fuel in the
combustion chamber is further arranged outside the
combustion chamber, and the secondary air supply system comprises a main air supply
pipe arranged outside the cylindrical furnace wall. The main air supply
pipe is connected with a plurality of
cyclone pipes which output high-speed
airflow into the combustion chamber and enable high-temperature
smoke in the combustion chamber to rotate with the axis of the combustion chamber as the center. The
biomass fuel semi-gasification combustion furnace is sufficient in fuel combustion in the using process, the output high-temperature
smoke is low in ash carrying amount, and when the
biomass fuel semi-gasification combustion furnace is matched with a
smoke air
heat exchanger to form a
hot blast stove, the smoke heat exchange and ash removal maintenance period is long.