DEVICE OF DRYING GRANULE AND METHOD OF DRYING GRANULE

To provide a device of drying granules and a method of drying granules, capable of efficiently drying a raw material of a low allowable upper limit temperature.SOLUTION: A drying device 1 is a continuous drying device of an airflow type to be used for drying a granulated material prepared from a low melting point substance as a raw material, such as a medicine, and comprises a granulated material feeder 11, a dryer 12 and a product discharger 13. The dryer 12 comprises a drying treatment pipe 25 including a plurality of straight pipes 31 and bent pipes 32 each connecting the straight pipes 31. The bent pipes 32 are each equipped with an additional-air feeding pipe 34 for additionally feeding air into the drying treatment pipe 25. Each of the additional-air feeding pipes 34 is disposed on a position away from a deviation section X where a granulated material 36 in the pipe is present while deviating and opens at a position where the presence of the granulated material 36 is sparse. Additional air at a temperature of a melting point or higher of the granulated material 36 is fed into the drying treatment pipe 25 from the additional-air feed pipe 34.SELECTED DRAWING: Figure 2 【課題】低許容上限温度の原料であっても、効率良く乾燥処理が行い得る粉粒体の乾燥装置・乾燥方法を提供する。【解決手段】乾燥装置１は気流式の連続乾燥装置であり、医薬品等の低融点物質を原料とする造粒物の乾燥処理に使用され、造粒物投入部１１と、乾燥処理部１２及び製品排出部１３とを有する。乾燥処理部１２は、複数個の直管部３１と、各直管部３１の間を接続する屈曲部３２と、を備えた乾燥処理管２５を有する。屈曲部３２には、乾燥処理管２５内に空気を追加供給する追加空気供給管３４が取り付けられている。追加空気供給管３４は、管内の造粒物３６が偏って存在する偏倚部Ｘから離間した位置に配置され、造粒物３６の存在が希薄な部位に開口する。追加空気供給管３４からは、造粒物３６の融点以上の追加空気が乾燥処理管２５内に供給される。【選択図】図２