To keep a ratio of coals to be distributed at a fixed value without adjusting a position of a streamlining plate even if kind of coal is changed when coals are distributed into a line which supplies coals at a certain ratio and a line which circulates coals.

A casing 11 provided with chute parts 11a, 11b for dividing coals 3 which are charged into circulation lines 8, 9, 10 and a supply line 7 is provided on a tip side in the direction of conveyance of a conveyance device 5 which conveys the coals 3 which are crushed by a crusher 4 and are supplied. A streamlining plate 15 which can an upper end side in the direction of width of the conveyance device 5 is provided at a higher position than the chute parts 11a, 11b of the casing 11. A cam 22 which adjusts a clearance H between an inclined plate 19 provided between the conveyance device 5 and an upper end of the streamlining plate 15 in such a manner that coals slide and drop and the cam 22 and can turn is provided above the inclined plate 19.