Cement kiln burner and method for operating same

1 . A cement kiln burner comprising a plurality of columnar or cylindrical flow channels, wherein outlets of the respective flow channels are disposed on substantially the same plane, and a wind velocity adjusting member capable of changing a cross-sectional area at an outlet-side tip-end portion of the flow channel by moving along an axial direction of the flow channel in a state of being in contact with one of an inner peripheral wall and an outer peripheral wall of the flow channel and not in contact with the other is provided inside at least one of the flow channels, wherein the wind velocity adjusting member is a circular tubular member whose inner diameter is the same as the diameter of the inner peripheral wall of the flow channel and whose outer diameter is smaller than the diameter of the outer peripheral wall of the flow channel, or whose outer diameter is the same as the diameter of the outer peripheral wall of the flow channel and whose inner diameter is larger than the diameter of the inner peripheral wall of the flow channel, and wherein each of the plurality of flow channels is provided with the wind velocity adjusting member.

2 . The cement kiln burner according to claim 1 , wherein at least one of the flow channels provided with the wind velocity adjusting member forms straight air flows.

3 . The cement kiln burner according to claim 2 , wherein the wind velocity adjusting member is provided inside a cylindrical flow channel positioned on an outermost side among the plurality of flow channels.

4 . A method for operating a cement kiln burner according to claim 2 , the method comprising:

reducing a cross-sectional area at a tip-end portion of the flow channel by advancing the wind velocity adjusting member toward the outlet side when increasing the wind velocity of the fluid blown out from the flow channel provided with the wind velocity adjusting member; and

increasing the cross-sectional area at the tip-end portion of the flow channel by retracting the wind velocity adjusting member from the outlet side when decreasing the wind velocity of the fluid blown out from the flow channel.

5 . The cement kiln burner according to claim 1 , wherein at least one of the flow channels provided with the wind velocity adjusting member forms swirl air flows having a swirl angle of 1 to 60 degrees.

6 . The cement kiln burner according to claim 5 , wherein the wind velocity adjusting member is provided inside a cylindrical flow channel positioned on an outermost side among the plurality of flow channels.

7 . A method for operating a cement kiln burner according to claim 5 , the method comprising:

reducing a cross-sectional area at a tip-end portion of the flow channel by advancing the wind velocity adjusting member toward the outlet side when increasing the wind velocity of the fluid blown out from the flow channel provided with the wind velocity adjusting member; and

increasing the cross-sectional area at the tip-end portion of the flow channel by retracting the wind velocity adjusting member from the outlet side when decreasing the wind velocity of the fluid blown out from the flow channel.

8 . A method for operating a cement kiln burner according to claim 1 , the method comprising:

reducing a cross-sectional area at a tip-end portion of the flow channel by advancing the wind velocity adjusting member toward the outlet side when increasing the wind velocity of the fluid blown out from the flow channel provided with the wind velocity adjusting member; and

increasing the cross-sectional area at the tip-end portion of the flow channel by retracting the wind velocity adjusting member from the outlet side when decreasing the wind velocity of the fluid blown out from the flow channel.

9 . A cement kiln burner comprising a plurality of columnar or cylindrical flow channels, wherein outlets of the respective flow channels are disposed on substantially the same plane, and a wind velocity adjusting member capable of changing a cross-sectional area at an outlet-side tip-end portion of the flow channel by moving along an axial direction of the flow channel in a state of being in contact with one of an inner peripheral wall and an outer peripheral wall of the flow channel and not in contact with the other is provided inside at least one of the flow channels,

wherein at least one of the flow channels provided with the wind velocity adjusting member forms straight air flows,

wherein each of the plurality of flow channels is provided with the wind velocity adjusting member.

10 . A cement kiln burner comprising a plurality of columnar or cylindrical flow channels, wherein outlets of the respective flow channels are disposed on substantially the same plane, and a wind velocity adjusting member capable of changing a cross-sectional area at an outlet-side tip-end portion of the flow channel by moving along an axial direction of the flow channel in a state of being in contact with one of an inner peripheral wall and an outer peripheral wall of the flow channel and not in contact with the other is provided inside at least one of the flow channels,

wherein at least one of the flow channels provided with the wind velocity adjusting member forms swirl air flows having a swirl angle of 1 to 60 degrees,

wherein each of the plurality of flow channels is provided with the wind velocity adjusting member.