Problem to be solved: to provide an overheating steam sterilizing apparatus capable of eliminating the unevenness of irradiation of superheated steam even if the sterilization of a large amount of grains is possible and the grain is large.An overheated steam sterilization apparatus according to one embodiment of the present invention is a horizontal cylindrical portion having one end where a supply port for supplying an object to be sterilized is formed, and another end where an exhaust port for discharging a sterilization treatment is formed, and a rotary shaft portion rotatably disposed in a horizontal cylindrical portion A rotary shaft comprising a helical screw for transporting the supplied sterilizer and an agitating member having a plurality of stirring vanes to agitate the sterilized material, and a plurality of superheated steam nozzles disposed above the transverse cylindrical portion and disposed on the horizontal cylindrical portionA superheated steam box that is partitioned into a plurality of compartments along the axial direction and temporarily stores the superheated steam supplied from the superheated steam nozzle and the superheated steam stored in the superheated steam box is transferred in the lateral tube It is provided with a steam discharge port for irradiating the sterilized material during the transmission and stirring.連続的に多量の穀粒の殺菌処理が可能であり、かつ、穀粒の投入が多量であっても、過熱蒸気の照射ムラをなくすことのできる過熱蒸気殺菌装置を提供する。 本発明の一実施形態による過熱蒸気殺菌装置は、被殺菌物を供給する供給口が形成された一端と、殺菌処理物を排出する排出口が形成された他端と、を有する横型筒状部と、横型筒状部内に回転可能に配置される回転軸部であって、供給された被殺菌物を移送する螺旋スクリューと、被殺菌物を撹拌する複数の撹拌羽根を有する撹拌部材と、を備える回転軸部と、横型筒状部の上方に配置される複数の過熱蒸気ノズルと、横型筒状部の上に配置される過熱蒸気ボックスであって、軸線方向に沿って複数の区画に仕切られ、過熱蒸気ノズルから供給される過熱蒸気を一時的に貯留する過熱蒸気ボックスと、過熱蒸気ボックスに貯留した過熱蒸気を横型筒状部内で移送・撹拌中の被殺菌物に照射するための蒸気排出口と、を備える。
