geo based procedure for sterilization of teilchenformigem feststoffmaterial

摘要

1445942 Sterilization NESTLE SA 5 Feb 1975 [26 Feb 1974] 8710/74 Heading A2D A batch process for the sterilization of particulate solid materials comprises introducing a batch of particulate solid material into a rotary vessel shaped so that rotation thereof imparts a tumbling action to the solid material, heating the solid material in the vessel whilst rotating the same, the heating being at least partly by the introduction of steam into the vessel to condense therein, the condensate and solid material being held at a sterilization temperature while maintaining the tumbling action, the sterilized solid material being withdrawn from the vessel under aseptic conditions. The process is particularly applicable to the sterilization of meat and vegetables and may be carried out in the apparatus shown in Fig. 1. The apparatus comprises a sterilization vessel 14 provided with hollow trunnions 18 and 19 mounted in bearing blocks 13. Each trunnion is provided with a manifold assembly 22 whereby service lines for air, water, steam and electric power may be provided for vessel 14. The vessel is provided with a jacket 23 for steam or cooling water. The vessel is further provided with a loading door 24 and a pneumatically operated solids discharge valve 25 connected to a discharge conduit 26 which passes coaxially along trunnion 18 to a storage tank or packaging apparatus. The downstream zone of valve 25 and conduit 26 is sterilized with steam from line 41. Trunnion 19 carries inlet pipe 31 for the supply of sterilizing steam and other fluids, a vent and outlet pipe 32 and a temperature probe 33. Apart from sterilizing steam, a sterile gas e.g. air, or a gas mixture may be supplied via pipe 31. Further, a liquid additive may be supplied via pipe 31 for blending with the sterilized material. The sterilization of an entrÚe and a curry is exemplified.