The utility model relates to a multi-channel swirling flow stabilizing
flame stepless adjustable mixed
combustion burner, which relates to a burner, in particular to a mixed
combustion burner using pulverized
coal and gas as fuel or a single
combustion burner of pulverized
coal and gas. It is equipped with a conical ring
flame stabilizer in the center of the burner shell, the
small head of the
flame stabilizer is connected to the central air
pipe and the gas
pipe, and the outer wall of the gas
pipe is connected to a gas mixer. A
volute swirler and an adjustment pull rod are arranged on the outer wall of the gas ring joint and the gas pipe at the other end. The outer layer of the gas pipe is equipped with a fire channel, a primary
air channel, a secondary
air channel and a clean
air channel. The secondary air duct and the clean air duct are equipped with swirlers and conical air nozzles respectively. The outer wall of the outlet of the clean air inner pipe and the secondary air inner pipe is made with a cone angle of 15-20° that expands outwards, and the cross-sectional area of the outlet can be changed arbitrarily in the axial direction, and the
airflow velocity can be changed. The flame stabilizer can move axially to change the outlet angle of the central air. In this way, the
heat load flame shape can be adjusted steplessly, and the combustion temperature can be organically combined with the
process conditions. The invention is a pulverized
coal and gas burning device with high efficiency, energy saving and
low emission of
NOx.