The steps to use the plate heat exchanger
1. heat recovery section;
2. sterilization section;
3. cooling section;
The pre-cooled 5°C fresh milk is absorbed by heat in the heat recovery section, reaching about 65°C. It is homogenized by a homogenizer and then heated to 85°C for more than 15s. Finally, it is cooled to 5°C with ice water, sent to the packaging workshop, and packed in bottles or soft plastic bags. In the sterilization section, hot water is used as the heating medium, the cooling section uses ice water as the cooling medium, and the heat recovery section uses the sterilized milk as the heat medium to fully utilize the heat of the hot milk to heat the cold milk. The heat recovery rate can be reached—85%~90 %.
Plate heat exchanger design solution
Plate material: 304 or 316
Gasket: NBR
1. Heat recovery section: Both sides of the medium are milk
Hot side inlet temperature: 85 degrees or more
Cold side inlet temperature: 5 degrees outlet temperature 65 degrees
2. Sterilization section:
Cold side: preheated milk; temperature: inlet: 65 out 85 or more
Hot side: hot water 95 or more
3. Cooling section:
Cold side: milk that needs to be preheated and ice water
Hot side: hot milk that kills bacteria