Biomass gas combustor

The utility model relates to a biomass gas combustor which is characterized by comprising a long-term open fire fuel gas channel, a long-term open fire air channel, a main combustion fuel gas channel and a main combustion air channel, wherein an ignition device penetrates through the long-term open fire air channel and extends to the front end of the long-term open fire fuel gas channel, and the front part of the long-term open fire air channel, the front part of the main combustion fuel gas channel and the front part of the main combustion air channel are respectively provided with a swirler; the long-term open fire air channel and the main combustion air channel is respectively provided with a flow regulating device. According to the biomass fuel gas combustor, the long-term open fire fuel gas channel and the long-term open fire air channel are arranged, a long-term open fire standby function is achieved, consumption of liquefied gas or natural gas is reduced, waste of ignition fuel is avoided, and starting