Cement kiln burner device and method for operating the same

A cement kiln burner device including a plurality of flow channels partitioned by a plurality of concentric cylindrical members, the cement kiln burner device comprising:

• a powdered-solid-fuel flow channel including means for swirling a powdered-solid-fuel flow;
• a first air flow channel placed outside the powdered-solid-fuel flow channel to be adjacent to the powdered-solid-fuel flow channel, the first air flow channel including means for swirling an air flow;
• a second air flow channel placed outside the first air flow channel to be adjacent to the first air flow channel, the second air flow channel including means for straightly forwarding an air flow;
• a third air flow channel placed inside the powdered-solid-fuel flow channel to be adjacent to the powdered-solid-fuel flow channel, the third air flow channel including means for swirling an air flow;
• and
• a combustible-solid-waste flow channel placed inside the third air flow channel, wherein
• of the first air flow channel, the second air flow channel, and the third air flow channel, only the second air flow channel includes an opening portion forming a port for injecting an air flow, and a closed portion covered for preventing an air flow from passing therethrough, and
• the opening portion and the closed portion are alternately arranged in a circumferential direction.