| 摘要 |
The heat treatment of hermetically packaged food product for sterilization/debacterization, comprises heating the product followed by cooling, pre-cooling the product at ambient temperature by cold water circulation inside radiator pipes (2) passing nearby the package in an autoclave (1), and cooling the package by injecting/spraying the water directly contacted on the packages. The packages are not directly contacted with water. The flow of water at the bottom of the autoclave is recovered. The heat treatment of hermetically packaged food product for sterilization/debacterization, comprises heating the product followed by cooling, pre-cooling the product at ambient temperature by cold water circulation inside radiator pipes (2) passing nearby the package in an autoclave (1), and cooling the package by injecting/spraying the water directly contacted on the packages. The packages are not directly contacted with water. The flow of water at the bottom of the autoclave is recovered. The recovered water is recirculated at the upper part of the autoclave to inject/pulverize the water over the packages. The package is heated in the autoclave by steam. The condensate at the bottom of the autoclave is recovered at the stage of pre-cooling. The water originating from the steam condensates is recovered at the bottom of the autoclave by mixing with the flow of water at an outlet (6) of the radiator pipes. Mechanical properties of the treated products are affected by humidity when the packages are carried at a given temperature. The product is pre-cooled to lower the temperature until reaching an ambient packaging temperature of 80[deg]C. The package comprises paper or carton. The package is made up of multi layer complex of paper and carton pasted by polymer binders. The radiator pipes are in the form of rectangular plates (2a), which are connected to each other by the tubular conduits. Forced air ventilation (8) is carried out in the autoclave during the pre-cooling of the product for maintaining the pressure by the injection of compressed air. The plates are arranged laterally to the package and in the longitudinal direction of autoclave to form a ventilation duct. The pre-cooling temperature is regulated by controlling the water supply of the radiator pipes. An independent claim is included for a heat treatment device. |
