在所有可用的浓缩方法中,冷冻浓缩提供了最高的除水选择性,因为冰晶只含有水。
完全分离这些冰晶会导致在非常低的加工温度下特定地去除水。在零下温度下非常温和的浓度可以保持产品的新鲜度,并且实际消除了所有生物降解。
由于结晶过程对水具有高度特异性,并且不存在气相,因此所有挥发性香气和风味都将保留在液体浓缩物中。
重要特征:
- 无挥发物或固体损失
- 零下温度处理
- 保持原有产品特性
- 可防止氧化的封闭系统
- 消除微生物活动
- 连续稳定运行
食品溶液的冷冻浓缩与化学品的熔融结晶的区别在于,液体是水而不是化学品的溶液,产品是浓缩物而不是分离的(冰)晶体。
冷冻浓缩设备遍布全球各地,脱水能力从每年 200 吨到 200,000 吨不等,可处理从小批量特种产品到大型商品的各种产品,服务于可分为两大组的不同工业工艺:
食品浓缩
- 果汁、苹果酒、葡萄酒、牛奶、乳清、脱脂乳、
- 咖啡萃取物、茶萃取物、海藻萃取物、鱼萃取物
- 醋、麦芽汁
- 蛋清液
废水
- 从混合废水生产高纯水
- 在一个步骤中从含有溶解的挥发性物质的进料中分离纯水。
- 对缩放组件的存在不敏感
- 对某些悬浮固体的存在不敏感
- 以污浆的形式处理分离流中的沉淀固体(共晶冷冻浓缩)

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The breakthrough that changed spray drying
In 1976, NIRO engineers responded to a competitive challenge by rethinking what spray drying could do. Their idea became the multi-stage dryer MSD. Fifty years later, the same fundamental principle helps turn liquids into the powders used in essential nutrition products and important medicines around the world. Refined through decades of engineering expertise, customer insight and continuous development, MSD is a story of innovation with lasting impact.





