Flour sifting device

A flour sifting device (1), comprising:

• a flour sifting tank (4) provided with a flour sifting trough (5) with flour sifting holes at a bottom of the flour sifting trough;
• a rotating brush (8) located inside the flour sifting tank (4) having a rotating shaft (7, 7*) and arranged to brush the flour sifting holes;
• the rotating brush (8) comprises a first plurality of discrete flexible brush elements (12c, 12c*) that are distributed on said rotating shaft (7, 7*) and extend therefrom in a radial direction with respect to said rotating shaft (7, 7*) such that collectively the first plurality of discrete flexible brush elements (12c, 12c*) form a screw conveyor with a circular outer contour;
• said brush elements (12c, 12c*) are arranged on a second plurality of separate identical brush modules (12, 12*), each said brush module (12, 12*) comprising a number of said brush elements (12c, 12c*), and the brush modules (12, 12*) are individually and removably mounted or mountable on the rotating shaft (7, 7*).