PRESEPARATORS AND CYCLONES FOR THE COLLECTION OF STRIPPER COTTON TRASH

Three experiments were conducted to evaluate several combinations of a preseparator and cyclones for the collection of gin trash from stripp er-harvested cotton. Preseparator efficiency increased as the air velo city inside the preseparator decreased. A 90% efficient preseparator d esign reduced dust emissions from a 2D2D cyclone by about 8%, but offe red no such improvements for a 1D3D cyclone. In two of three experimen ts the preseparator actually tended to increase emissions from the 1D3 D cyclone. This adverse effect was attributed to a problem of lint rec irculation in the cyclone's cone section near the trash outlet. Presep aration tended to exacerbate this problem, especially for the 1D3D cyc lone.