COOLING DRUM FOR FREEZING GRANULES, AND ROTARY FREEZER

To provide a cooling drum for freezing granules that prevents the frozen granules from remaining inside, and a rotary freezer.SOLUTION: A cooling drum 100 for freezing granules is provided with an inlet 111 through which granules are introduced, and an outlet 122 which is positioned on the side of the drum opposite to the inlet 111 and through which the granules are discharged. The cooling drum 100 for freezing granules includes a first cylindrical section 110 which has a first inner surface 115 formed from a first material, and a second cylindrical section 120 which has a second inner surface 124 formed from a second material and positioned on the outlet 122 side of the first cylindrical section 110. The thermal conductivity of the first material is lower than the thermal conductivity of the second material.SELECTED DRAWING: Figure 6 【課題】凍結した粒状物が内部に残りにくい粒状物冷凍用の冷却ドラム、及び回転式冷凍装置を提供する。【解決手段】粒状物冷凍用の冷却ドラム１００は、粒状物を取り込むための入口１１１と、入口１１１とは反対側に位置し粒状物を排出するための出口１２２とを備える。また、粒状物冷凍用の冷却ドラム１００は、第１材料によって形成された第１内表面１１５を有する第１筒部１１０と、第１筒部１１０よりも出口１２２側に配置され、第２材料によって形成された第２内表面１２４を有する第２筒部１２０と、を含む。第１材料の熱伝導率は、第２材料の熱伝導率よりも低い。【選択図】図６