A feed mixture distribution device configured to evening out a feed of feed mixture in an annular feed mixture feed channel of a burner, wherein the feed mixture distribution device comprises a cylindrical member having a cylindrical wall, a first end, a second end, and a longitudinal central axis X, and wherein the cylindrical member is at the first end provided with rectangular flat plate means, which extend radially from the cylindrical wall of the cylindrical member and which are arranged symmetrically about the longitudinal central axis X of the cylindrical member, wherein the cylindrical wall of the cylindrical member is between the rectangular flat plate means and the second end provided with helical plate means arranged symmetrically about the longitudinal central axis X of the cylindrical member, 2- wherein each helical plate means extend towards the second end of the cylindrical wall of the cylindrical member in a helical manner about the longitudinal central axis X of the cylindrical member, characterized by each helical plate means has a downstream end and a feed mixture bearing surface, wherein the width of the feed mixture bearing surface as measured along a line normal to the longitudinal central axis X of the cylindrical member decreases in a direction towards the downstream end of the helical plate means, by each helical plate means comprises an upstream helical plate section, which comprises a part of the feed mixture bearing surface and which extend towards the second end of the cylindrical member in a helical manner about the longitudinal central axis X of the cylindrical member and a downstream helical plate section, which comprises a part of the feed mixture bearing surface and which extend towards the second end of the cylindrical member in a helical manner about the longitudinal central axis X of the cylindrical member, by a slit between each upstream helical plate section of the helical plate means and each downstream helical plate section of the helical plate means, by the handedness of the upstream helical plate section of the helical plate means being different than the handedness of the downstream helical plate section of the helical plate means, and by the downstream end of the helical plate means being a part of the downstream helical plate section of the helical plate means. a cylindrical member having a cylindrical wall, a first end, a second end, and a longitudinal central axis X, and wherein the cylindrical member is at the first end provided with rectangular flat plate means, which extend radially from the cylindrical wall of the cylindrical member and which are arranged symmetrically about the longitudinal central axis X of the cylindrical member, wherein the cylindrical wall of the cylindrical member is between the rectangular flat plate means and the second end provided with helical plate means arranged symmetrically about the longitudinal central axis X of the cylindrical member, 2- wherein each helical plate means extend towards the second end of the cylindrical wall of the cylindrical member in a helical manner about the longitudinal central axis X of the cylindrical member, characterized by each helical plate means has a downstream end and a feed mixture bearing surface, wherein the width of the feed mixture bearing surface as measured along a line normal to the longitudinal central axis X of the cylindrical member decreases in a direction towards the downstream end of the helical plate means, by each helical plate means comprises an upstream helical plate section, which comprises a part of the feed mixture bearing surface and which extend towards the second end of the cylindrical member in a helical manner about the longitudinal central axis X of the cylindrical member and a downstream helical plate section, which comprises a part of the feed mixture bearing surface and which extend towards the second end of the cylindrical member in a helical manner about the longitudinal central axis X of the cylindrical member, by a slit between each upstream helical plate section of the helical plate means and each downstream helical plate section of the helical plate means, by the handedness of the upstream helical plate section of the helical plate means being different than the handedness of the downstream helical plate section of the helical plate means, and by the downstream end of the helical plate means being a part of the downstream helical plate section of the helical plate means.