What are the canning processes?

2024-03-26

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The canned sterilization process has strict requirements, and there are different process curves for different varieties. According to the time sequence, it can be divided into four stages: heating, heating, heat preservation and cooling. At present, most canned sterilization adopts the method of steam heating and cold water cooling. The main equipment adopts sterilizer. The requirements for the sterilization process are as follows.

1. Pre-heating stage: the material needs to be rapidly heated by steam circulation, and the temperature in the kettle is required to rise to 100°C to 106°C within 5 to 6 minutes.

2. Heating stage: let the temperature in the kettle rise at a certain rate, and it will rise to 127℃ in about 10min, and the corresponding steam pressure will reach 1X105Pa.

3. Insulation stage: keep the temperature of the kettle at 121 °C, and keep the steam pressure in the kettle at 1X105Pa. The holding time varies with the variety of materials, generally ranging from 15 to 30 minutes.

4. Cooling stage: reduce the temperature of the kettle from 121℃ to below 40℃ within a certain period of time. A very important requirement at this stage is to keep the pressure in the kettle basically unchanged, but while adding cold water to cool the kettle, the pressure in the kettle is often greatly affected. Once a large amount of cold water is injected into the kettle, the pressure will rapidly increase The decline needs to be controlled in time.

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2024-03-26

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