Beer bottle rinsing methods are crucial for ensuring thorough internal cleaning. The injection pressure and jet size play a key role in this process. The jet should be thin enough to reach all parts of the bottle's bottom simultaneously, while the amount of liquid sprayed must be moderate—too much can lead to air embolism. Typically, the injection pressure is maintained between 0.20 and 0.25 MPa. However, there are some drawbacks: first, the basic solution lacks buffers, penetrants, and scale inhibitors, and has high total alkalinity. At washing temperatures, the label paper can easily become corroded and disintegrate, leading to residue in the wash solution that may clog nozzles and cause scaling in the tubes. Second, strong alkali can erode glass bottles, resulting in less-than-ideal brightness after cleaning. Third, the absence of colloidal components like hair or phosphate leads to poor emulsification and dispersion of mineral oil, often leaving the residual liquid in the cleaned bottles with a high pH.
Bottle washing agents used in the beer industry are generally divided into three main types. The first type uses simple sodium hydroxide (NaOH) as the primary washing agent. The second type involves a mixed powder formulation containing solid detergents and additives such as NaOH, sodium carbonate, phosphates, and yuanming powder. The third type employs liquid or solid alkali as the base, combined with high-performance additives. When comparing these three types, the compound solid washing agent offers several advantages. It has a lower total alkalinity, reducing damage to label paper and allowing it to detach in whole pieces, which makes mechanical descaling easier. Its overall cleaning performance is strong, resulting in bright, clean bottles without scale buildup and offering protection to the equipment. However, it also has disadvantages: it is more expensive, produces more foam during the washing process, and contains phosphorus, which doesn't align with current phosphorus-free washing standards.
Overall, choosing the right washing agent depends on balancing effectiveness, cost, and environmental impact. While some solutions may be more economical, they might compromise on quality or sustainability. On the other hand, higher-quality agents offer better results but come at a higher price. As the industry evolves, there is a growing emphasis on eco-friendly and efficient cleaning solutions that minimize waste and protect both the product and the environment.
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