干燥工艺
FSD® 喷雾干燥机分三个干燥阶段运行，每个喷雾干燥阶段呈现不同的水分含量。
液体物料通过一组喷嘴雾化后进入干燥塔腔室。干燥空气通过空气分布器高速垂直进入，从而确保干燥空气与雾化液滴的优质混合。在液滴穿过干燥塔腔室时，即开始了水分的蒸发。干燥塔和气流设计可以有效防止颗粒黏附到塔壁上，并将它们直接引至干燥塔底部的静态流化床，开始进行第二阶段的干燥。最后，粉末被送入 VIBRO-FLUIDIZER™ 流化床，进行最后的干燥及冷却。
干燥空气从塔顶离开干燥塔腔室，从而允许极其完美的二次复聚，在此过程中干燥空气中的细颗粒与来自喷嘴的雾化颗粒相互碰撞。排放的气体通过一个布袋过滤器，捕捉干燥空气中残余的细小颗粒。从布袋过滤器中排放的细粉将返回至干燥塔——并且依据颗粒复聚要求——细粉可以被送至静态流化床或空气分布器。当粉末质量没有复聚要求时，细粉将直接被送入 VIBRO-FLUIDIZER™ 流化床。
附加复聚
FSD-GRANULATOR™ 可用于附加复聚需求——不同于将细粉返回至干燥塔腔室获得的效果。此专利系统允许将额外的液体物料添加至静态流化床——这是一项传统喷雾干燥塔无法实现的功能。容许添加的液体物料可以是水，与进料成分差别不大的液体，或含有各种添加剂的溶液。
Additional agglomeration stage
We can give your plant further functionality by adding our FSD-Granulator to the NIRO FSD® spray dryer. The FSD-Granulator technology allows additional liquid to be added into the spray dryer’s stationary fluid bed to effect another stage of powder agglomeration. The introduced liquid might have the same composition as the feed itself, or be a solution of defined composition, or even water.
NIRO FSD® for instant coffee
喷雾干燥，优化
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