【作者】 刘大陆； 吴林有；

【Author】 Liu dalu;Wu linyou;Second Depart,State Key Lab.of biochem.Eng.,Ins.of Chem.Metall.,Chines Academy of Science;

【机构】 中国科学院化工冶金研究所第二研究部生化工程国家重点实验室； 浙江省金华市矿产资源管理局；

【摘要】 本文提出的喷雾一循环流化床干燥装置,成功地应用于短梗霉多糖、真菌发酵液和井岗霉素生物农药等粘性物料的干燥,该装置结构简单、能耗低、回收率高,容积干燥强度比传统的喷雾干燥增高约17倍。对具有特殊粘性,且易成膜的短梗霉多糖发酵液,测定了在喷雾流化床干燥段中的传热和传质系数:N_u=1.26×10^-3（δ/d_p）^0.612Re^2.312Sh=1.28×10^-3（δ/d_p）^0.648Re^2.323更多还原

【Abstract】 A new kind of spray-fluid-bed drying system with inert carriers circulation is developed.The enhancement of transforing ratio of moisture in the liquid film can be done by increasing the relative velosity between the drying material and heating agent.It has been demostrated that the device is effective for drying of extreme stick pullulan solution with higher viscosity due to the use of hydrophobic carriers.For the spray-fluid-bed,an empirical formula of mass and heat transfer was obtained.更多还原