喷雾干燥技术是用喷雾的方法,使物料以雾滴状态分散于热气流中,物料与热气体充分接触,在瞬间完成传热和传质的过程,使溶剂迅速蒸发为气体,达到干燥的目的。喷雾干燥技术在制药行业中应用*,在固体制剂领域,常用于高热敏药品和料液浓缩过程中易分解药品的干燥。所得产品粒度细小、均匀,流动性和速溶性好。喷雾干燥机的分类方法很多,按气液流向可分为并流式、逆流式和混流式;按雾化器的安装方式可分为上喷下式、下喷上式;按雾化器的结构可分为离心式、压力式和气流式;按加热气体是否循环可分为开放式、部分循环式和密闭式。
固体制剂的工艺要求
固体制剂种类繁多,工艺要求也千差万别,在喷雾干燥机设计制造的过程中,*好针对不同的品种做不同的设计,以达到设备和工艺相适应的*佳状态。固体制剂生产用喷雾干燥机应满足下列要求:
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