The invention relates to a household
biomass gasifier comprising a gasifier body, an AC / DC variable speed blower and a
fuel gas burner, wherein the furnace body converts fuels into
combustible gas with a low heat value, the AC / DC variable speed blower sends air into the furnace body, and the
fuel gas burner burns the
combustible gas for
heat supply; the blower is provided with two air outlet pipelines, wherein one air outlet pipeline is led to the position below a grate bar at the lower part of the gasifier body, the air is sent to a gasification chamber through a plurality of air inlet holes on the grate bar, and the other air outlet pipeline is connected to the rear ends of two-stage purifying devices through air distribution pipelines and is connected with a
combustible gas transmission
pipe; a
fuel gasification chamber at the upper part in the gasifier is connected with the two-stage purifying devices through air output pipes, the combustible gas processed through a first-stage purifying device and a second-stage purifying device and the air transmitted through the blower are mixed at the rear end of the second-stage purifying device for forcible air distribution, wherein the air
distribution volume is that 15-20 percent of air is mixed into 1m<3> of combustible gas, and the mixed combustible gas enters a core inside the
fuel gas burner in a tangential direction through a
mixed fuel gas inlet pipeline; and the gasifier has the advantages of multiple fuels, easy operation and
environmental protection.