It is mainly used in the following aspects: The top milk effect of the material pipeline The residual water of the residual milk in the material pipeline has been removed by the traditional method of milk top water topping milk in the past. Residual residual water in the material pipeline, according to the empirical formula, the calculated value is 70.8 for the fullness factor of the pipeline; 0 is the nominal outer diameter of the pipe wall thickness.
It can be seen that for the stainless steel pipe of 038, 1.5, the residual water in the pipeline is about 1LAn, and for the 51xl.5 stainless steel pipe, the residual milk in the pipeline is about 1.6 large-scale dairy. Generally, there are long material conveying pipes. Therefore, the phenomenon of accumulated water in the pipeline is very serious. According to our statistics for several years, only 40 milk samples can be recovered by the milk top water topping method, and 60 are water milk mixed liquids. The main reason is that the material pipe cannot be installed with too much slope. And because of the high and low position of the equipment import and export, there are inevitably some dead tubes.
2 When the material is transported in the pipeline, it is impossible to fill the pipe. The water or milk topping process is the first process of mixing.
For about 60 water milk mixture, it can only be degraded or used. In order to ensure the quality of the finished product, the mixture is directly discharged in the actual operation process, and the secondary discharge amount of the strip feeding pipeline reaches 100200, which wastes raw materials and increases the sewage treatment volume after discharge. In this case, the annual loss amounted to hundreds of thousands of baht. In 2002, we began to use aseptic compressed air top water topping milk. The recovery rate of accumulated milk reached 98. Through the practice of recent years, we believe that except for the sterilization heating section, the rest Pipes can use this method to recover milk, and the effect is very significant.
2 The filling degree of the finished product tank The cleanliness of the air in the workshop can be tested by the air exposure method. The relationship between the degree of air pollution and the value of bacteria detected can be.
Plate colony number Air pollution degree evaluation below 30 clean and safe medium clean low cleaning should pay attention to high pollution disinfection of air 100 or more serious pollution prohibition processing detection method ordinary broth agar, diameter 9, flat plate exposed to air in 51370 culture Counting, the number of colonies is measured in the cleanliness of the air in the workshop. The sanitary quality of the fresh milk is generated. 1 The filling room air enters through the filling chamber venting hole and the air chamber between the filling head and the container.
2 Finished tank venting holes When the finished product enters the finished product tank, the air in the tank is discharged from the venting hole. As the filling process progresses, the liquid level of the finished tank is continuously reduced, and the air in the workshop is replenished from the vent hole to the tank.
Therefore, the cleanliness of the workshop air will directly affect the sanitary quality of the finished product.
According to our inspection data collection for several years, the relationship between the cleanliness of the workshop and the sanitary quality of the finished product is as follows: the number of air colonies is 9 flat air cleanliness and the finished colonies, and the relationship between the values ​​is 1 in the finished colonies, and the value is the average of 20 samples. value.
Note 2, the value calculation method subtracts the number of colonies from the sterilizer exit.
From the above, the cleanliness of the air in the workshop is lower than that of the lower cleaning. The value of the finished bacteria is 510, which is a dangerous control point in the production process.
In the production practice, we use aseptic compressed air to pressurize the finished tank, so that the finished tank always maintains a positive pressure during the filling process. The normal control pressure is 2040 to isolate the air entering the workshop and prevent the unclean air from being quality. Influence, achieved good 3 aseptic compressed air for material transportation If the finished tank is modified to withstand 1 pressure, it can be fed with sterile compressed air without pump, which can solve the centrifugal pump transportation. There are many milk foams, and the investment in purchasing cam pumps is large.
In a single-storey factory, the pressure in the finished product tank is only required. The application of aseptic compressed air in the aseptic processing of the air disinfection system is to build an effective air aseptic processing system. The following is the principle of air aseptic processing system. The compressed air source requires water and oil level filtration and freeze drying. The dry gas 45 弋 pressure dew point is 1008.
The air is sterile filtered into a coarse filtration sterile filtration stage. The application of air aseptic processing system should pay attention to the main problem. There is a new production line. Do not install the Filter Element. After the system is cleaned with acid and alkali water, clean it and install it to prevent the impurities and oil generated during the pipeline installation from contaminating the filter element.
2 Filters should be used frequently and should not be deactivated for a long time.
3 system sterilization cycle should be determined according to the number of bacteria, such as sterilization. At the same time, before the sterilization, the filter should periodically open the drain valve to remove steam condensation water and impurities. The sterilization temperature was 120140 for 12 hours. At the same time, in order to ensure the purity of the sterilization steam, a steam filter is required at the steam inlet. Imported components are required for the above-mentioned main filters.
Domestic suppliers of air aseptic processing systems mainly include Lehui Industrial Co., Ltd. Shanghai Ruiyuan Industry and Trade Co., Ltd.
The set of 10 〃 long specification air aseptic processing system is about 230,000 yuan.
Conclusion 1 Aseptic compressed air can be used for top milk topping water in the processing of fresh milk, and the finished tank is inflated without chestnut pressure feeding. It has significant effect on reducing raw material loss and improving product quality. 2 Establishing effective and reliable air aseptic processing The system is essential for the full play of the role of sterile compressed air in the processing of fresh milk. As long as the use is correct, the set of 230,000 yuan of air aseptic processing system equipment investment, the annual return of several hundred thousand yuan, the economic benefits are very obvious.
Application of Lu Peiqi aseptic compressed air in fresh milk processing
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