The invention relates to the clean utilization field of gas and relates to a device applicable to
combustion of gas with the low calorific value. The device comprises a
combustion tower (3), a gas inlet (1), a
smoke outlet (5), a primary air
pipe (9) which is communicated with an
air chamber (12), an ignition hole (11), a secondary air
pipe (8) and a
combustion stabilizing cone (2), wherein the secondary air
pipe (8) is connected with a plurality of
branch gas pipes (7) through multistage of annular distributors (6); the
branch gas pipes (7) are tangentially communicated with the inside of the combustion
tower (3); the combustion stabilizing cone (2) is cone-shaped or
frustum-shaped and arranged above the gas inlet (1) in the combustion
tower (3); a plurality of channels are evenly formed in the wall surface of the combustion stabilizing cone. The device is capable of reducing heat needed by igniting the gas with the low calorific value in a hierarchical air supply manner, increasing the ignition
heat supply through a multi-channel regenerative combustion stabilizing cone, facilitating the mixing of the compounded tangent-flow and direct-flow gas and the air in a manner of compounding tangent flows and direct flows, so that the efficient and stable combustion of the gas with the low calorific value is realized.