In a certain temperature range, the lower the temperature, the slower the reproduction of bacteria; the higher the temperature, the faster the reproduction (the appropriate temperature for general microbial growth is 28 ° C - 37 ° C). But if the temperature is too high, the bacteria will die. Different bacteria have different growth temperatures and heat and cold resistance. Pasteurization is actually the use of pathogens that are not very heat-resistant. They are treated with appropriate temperature and holding time to kill them all. However, after pasteurization, a small number of harmless or beneficial, heat-resistant bacteria or bacterial spores are retained, so pasteurized milk is stored at a temperature of about 4 °C.
The pasteurization line can eliminate some enzymes and pathogenic microorganisms, and the pasteurization line is safe and reliable, and the quality is guaranteed. In addition, in order to prevent problems during cleaning, there are a number of things to be aware of when cleaning pasteurization lines:
1. Cleaning pasteurization line cold homogenization is the same as cleaning pipeline.
2. When cleaning the pasteurization line, it must ensure sufficient supply of concentrated acid and alkali.
3. Make the pasteurization line low temperature for a long time, and check whether the ice water inlet and outlet butterfly valve is closed.
4. Whether the cooling water is turned on when the pasteurization line homogenizer is cleaned; when cleaning the single-effect falling film reducer, the liquid level check of the evaporation chamber, the separation chamber and the condensation tower is below the eyepiece, if the outlet pressure is not adjusted, Reach the eye below the eyepiece.
5. When the conductivity meter of the pasteurization line cleaning circuit does not change for a long time, immediately check all valve actions (especially whether the manual valve is open).
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