The invention discloses a stable
combustion device for pulverized
coal ignition, which comprises a primary air
pipe, a flow guide sleeve, pulverized
coal concentrator and a guide
pipe as well as an
ignitor, wherein pulverized coals pass through the primary air
pipe, the flow guide sleeve, the pulverized
coal concentrator and the guide pipe are arranged in the primary air pipe in sequence, and the
ignitor is radially arranged at an outlet of the primary air pipe. A
rotational flow blade capable of rotational
liquid jet is arranged between the guide pipe and the inner wall of the primary air pipe; and a secondary air duct formed by a secondary air pipe is arranged outside the primary air pipe and an expanding primary air pipe. In the structure, a central recirculation region is formed behind the adjustable rotational blade; the
ignitor is close to a low-speed central recirculation region to form a continuous and stable intensified heat source, thus the intensified heat source can be used as an ignition heat source required by the ignition of pulverized coal air flow so as to reduce the generation of
NOX (
nitric oxide) in the furnace effectively, and challenges caused by operation factor interferences and the substantial vibration of coal quality which occur suddenly can be dealt with. Therefore, the
combustion device is suitable for pulverized boilers for burning various coals, not only can be used as a stable ignition
combustion device, but also used for the operation of a main
combustor.