The heat distribution of the sterilization pot refers to the operation of the sterilization pot, a certain time in different parts of the temperature distribution of the sterilization pot, or a certain time in different parts of the temperature difference in the sterilization pot.
Significance of heat distribution of sterilization pot:
The internal heat distribution of the sterilization pot is not uniform, it will make the sterilization of some of the products, resulting in poor product quality. Some sterilization intensity is not enough, may cause incomplete sterilization of food safety accidents.
Such as sterilization pot heat distribution is not uniform, analysis and find the general idea to solve the problem from the steam supply or steam circulation two aspects to find the reason.
Firstly, the position of cold spot is found and the reason of cold spot is analyzed. If the cold spot is at the bottom of the pot, first remove the condensate water to find; Second, look for steam supply. Diameter of main pipe, steam pressure, condensed water in steam, aperture, quantity, uniformity of steam distribution, etc. The condensed water in the sterilization process must be fully eliminated, otherwise the cold point will move down and the heat distribution will be uneven.
The heat distribution of cross cage is much more uniform than that of overlap cage. Because the contact surface between cans with overlapping parts is reduced, and the steam circulation is poor, the heat transfer rate is significantly reduced, so it is necessary to carry out the cross cage.
The opening degree of exhaust valve has great influence on heat distribution. Exhaust valve fully open, can promote steam flow, heat distribution is uniform, such as as long as one is not open or not open, the heat distribution is not uniform, and the cold point is not open near the exhaust valve.
Pot door leakage or valve running, dripping, leakage, pot heat distribution is not uniform, cold point shift.
Operation: Exhaust operation is the key. Exhaust is not sufficient, the cold air in the pot to form air bags, the cold point can not be eliminated, so that the pot heat distribution is not uniform and lead to incomplete sterilization. The heat distribution is uniform when the exhaust time is long and the temperature is high, and the F0 is obviously increased. The exhaust time and temperature can be appropriately extended.
Initial temperature: the initial temperature is high, the heat distribution is easy and uniform, and the different initial temperature has a very obvious effect on the F0 value.
Partition board: if you want to use must meet the requirements, it is recommended to leave the opening area should not be less than 20%, for flexible packaging, the opening area should not be less than 30%, the larger the opening area (the same cage way), the heat distribution is easy to uniform, after using the partition board should be appropriately extended exhaust time.
Post time: Mar-11-2022