Spraying Water Sterilization Techniques in Soft Bag Packaging Food Sterilization Advantages

The study of soft bag packaging (soft canned food) was led by the United States and began in 1940. Now, soft bagged foods can partially replace metal and glass cans and other packaged foods. Soft bag packaging has a small material thickness, rapid heat transfer, and short sterilization time, and better maintains the original color, aroma, and taste of foods. The packaging material has the advantages of light density, small size, space saving, convenient transportation, longer shelf life and convenient consumption, and can use the sterilization technology and equipment of metal cans and glass canned foods. However, the soft bag packaging material is low in strength, many companies in the high temperature cooking bag food in the second sterilization, although people, things, materials and other aspects have been strictly controlled, but the product is still not satisfactory, the soft bag breakage rate The phenomena of high “over-burning” and “cold spots” are frequent, resulting in low output rate and serious waste of materials.

Today, the sterilization equipment used for secondary sterilization of soft bag foods is mainly intermittent static sterilization equipment, including "steam sterilization pot", "water immersion sterilizer" and "water sterilizing pot". “Steam retort” is a traditional sterilizing device. Because there is a cold spot in the air during the sterilizing process, which leads to inconsistent sterilizing quality due to uneven temperature distribution, it is necessary to adopt exhaust measures to discharge part of the steam to the atmosphere ( About 25% of the heating heat source, resulting in large energy waste, causing noise in the workshop

Sound and pollution are not conducive to the development of the company and society. The "water immersed sterilizer" equipment has a large volume and is complicated to operate, and is mainly used for the sterilization of meat products.

"Spray-type sterilization pot" is divided into "side spray" and "top spray" two kinds, is a new generation of sterilization equipment, entered the country in the 1990s, Ningbo Rui Tuo Sterilization Equipment Co., Ltd. is the first production " Automatic water-type sterilizing pot" company. The sterilizing process is carried out by a plurality of nozzles arranged on both sides or the top of the sterilizer, which sprays out mist-like wave hot water to the surface of the food, and the temperature is raised and the cooling speed is rapid, and the product can be fully, quickly and stably Sterilization is especially suitable for the sterilization of high-temperature cooking bag foods.

Different from the traditional high-temperature and high-pressure sterilization method, the water spray sterilization method is:

Using "precision back pressure control" technology and "wave-shaped hot water injection" approach. Because the soft bag packaging materials are generally sensitive to cold and heat, and easy to damage, the new type of water sterilizing pot using a unique technology and watering method, can reach the pot pressure error is less than 0.01mpa, the temperature error is less than 0.3 °C, so that The inner product can be completely evenly compressed and heated;

Use "real-time flow accuracy measurement" device. Control the spray conditions in the pot at any time to ensure that the soft bag products in the pot are heated evenly to avoid "cold spots";

The new sprinkler sterilizer is fully controlled by the PLC and the “automatic touch screen” is the man-machine interface in the whole process of heating, heat preservation and cooling. The multi-stage heating and cooling process can reduce the temperature difference between the surface and the center of the soft bag food. Lifting temperature up to 16 segments, which is more than 2 times that of ordinary sterilizing pots in China. All parameters are easily input by PLC touch screen, and 30 groups of bactericidal parameters can be stored in advance. When the material is changed, relevant bactericidal parameters can be recalled. ;

Heat distribution measurement. Each sterilizer must be strictly determined before the delivery of the heat distribution measurement, the temperature error is strictly controlled within 0.5 °C, in order to ensure that each bag in the pot during the sterilization process is safe and reliable;

The cooling water is separated from the bactericidal water. The contact with the flexible packaging bag during cooling is the recirculating water that has been sterilized at a high temperature, which will not cause secondary pollution to the flexible packaging bag, and the cooling water will not be contaminated by the oil adhering to the surface of the flexible packaging bag, and at the same time can be recycled and saved water. , greatly reduce production costs;

high degree of automation. When the sterilization basket containing the product is pushed into the sterilization pot, as long as the start button is pressed, the whole sterilization process is heated up, thermostatically sterilized, pressurized, depressurized, and cooled automatically.

High-temperature sterilizer foods are characterized by the fact that the packaging is vacuum-treated to avoid discoloration and odor due to oxidation, as well as to extend the shelf life, and is easy to circulate, store, and sell at room temperature. The disadvantage is that due to the sterilization of a single high temperature for a long time, the taste and color of the food are greatly changed. The water-disinfecting retort is heated and sterilized for a short period of time in a plurality of stages to prevent the food from being exposed to high temperature and high pressure for a long period of time. The flavor and texture of the food produced are almost the same, and the range of products that can be processed is also more extensive.

Due to the huge technical advantages, the new type of water-type sterilization pot has gradually replaced the ordinary sterilizing pot and become the first choice for many soft bag food export enterprises in China. It is foreseeable that with the development of the domestic food industry, the development prospect of the spray-type retort is very bright.