In recent years, domestic and foreign companies have begun to explore and use continuous vacuum freeze dryers. The continuous equipment is characterized by being suitable for the production of a single product with a large output and ample raw materials, and is particularly suitable for the production of paste and granular products. The continuous equipment is easy to implement automatic control and simplifies manual operation and management. Its main disadvantage is its high cost.
With the end of the GMP certification, domestically produced freeze drying equipment for pharmaceuticals has fully entered the modernization stage, with complete functions, reliable work, stable performance, and can achieve online cleaning (CIP) or steam sterilization (SIP), and various technical indicators. Can meet the needs of biological products and pharmaceutical freeze-dried production. In contrast, foreign freeze-dried equipment has more specifications than domestic ones, complete equipment, energy-saving structure is more sophisticated, and continuous freeze-drying equipment has a large production volume. In order to guarantee the quality and energy saving of freeze-dried products, a combined freeze-drying device in which a freeze-drying device is combined with other drying devices is often used, for example, a spray freeze-drying device.
The development of dryers should also pay attention to energy saving and comprehensive utilization of energy, such as adopting various joint heating methods, transplanting heat pump and heat pipe technology, developing solar dryers, etc., and developing automatic control technology of dryers to ensure optimal operating conditions. In addition, as humans attach importance to environmental protection, improving the environmental protection measures of the dryer to reduce the leakage of dust and exhaust gas will also be the direction that needs further study.
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