PROBLEM TO BE SOLVED: To provide a retort device for securely recovering only the drain generated from condensation of steam for heating used for heat sterilization of a treated object, and reusing the collected drain.SOLUTION: A draining circuit 28 is disposed on the upstream side of a drain recovery circuit 26. By feeding steam to the primary side 1602 of a heat exchanger 16 in an initial stage of a heat-sterilization step 66, cooling water 34 remaining on the primary side 1602 of the heat exchanger 16, cooling water 34 remaining in a part of a cooling water circulation circuit 31 between first and second cooling water circulation valves 2404 and 2406 interposed in the cooling water circulation circuit 31 and the heat exchanger 16, and cooling water 34 remaining in a part of the drain recovery circuit 26 between a steam discharge valve 2604 interposed in the drain recovery circuit 26 and the heat exchanger 16 are discharged via piping 2802 and a remaining water discharging valve 2806.COPYRIGHT: (C)2012,JPO&INPIT【課題】被処理物の加熱殺菌に使用される加熱用蒸気の凝縮で生じたドレンのみを確実に回収して再利用するレトルト装置を提供する。【解決手段】ドレン回収回路26の上流側に排水回路28を設け、加熱殺菌工程66の初期段階で、熱交換器16の1次側1602に蒸気を供給することにより、熱交換器1602の1次側1602に残留する冷却水34と、冷却水循環回路31に介設された第1、第2の冷水循環弁2404、2406と熱交換器16との間の冷却水循環回路31の部分に残留する冷却水34と、ドレン回収回路26に介設された排蒸弁2604と熱交換器16との間のドレン回収回路26の部分に残留する冷却水34とを配管2802および残留水排水弁2806を介して排出させる。【選択図】図1
