目前,我国粮食烘干设备的种类较多,但应用较广的主要有塔式、圆筒式和流化式3种,其他如太阳能式、远红外式、微波式烘干机,或因设备造价昂贵,或因耗能较高,使推广应用受到较大的限制。塔式烘干机的产量多在10t/h以上,属大型烘干机。其特点是一次降水幅度较大,一般在0以上,******可达10%-20%。塔式
烘干机多用于烘干玉米、小麦。由于干燥介质的温度较高,降水速率较大,存在严重的爆腰问题,故不适用于烘干稻谷。回转圆筒烘干机产量多在15t/h以下,也是一种高温烘干设备。当机内粮食随着圆筒内壁抄板升举后向下散落时,粮食与干燥介质混合,烘粮和降水均较均匀,但干燥时间较短,一次降水较少,需经多次烘干、缓苏后,才能达到降水要求,也不适合烘干稻谷。流化式烘干机是一种典型的高温、快速烘干设备,应用固体流态化技术,粮食受热较均匀,且结构简单。但因粮食受热时间仅1min左右,比圆筒烘干机的烘干时间更短,需烘干、缓苏的循环次数更多,使干燥工艺复杂,也不是烘干稻谷的理想设备。
Fluidized dryer is a kind of typical high temperature, rapid drying equipment At present, China's grain drying equipment of sort is more, wide application, but the main tower, the drum type and three kinds of fluidization type, other type, such as solar energy, far infrared, microwave dryer, or because of equipment is expensive, or because of high energy consumption, the application is limited by the larger. Tower dryer production in more than 10 t/h, more large dryer. Precipitation is characterized by a larger extent, generally above 0, up to 10% - 20%. Tower dryers used for drying of corn and wheat. Due to higher temperature of the drying medium, precipitation rate is larger, there are serious lumbar problems, therefore is not suitable for drying rice. Rotary drum dryer production under 15 t/h, is also a kind of high temperature drying equipment. When machines food as the cylinder walls scattered down after lifting copy board, food mixed with dry medium, baked food and precipitation are relatively uniform, but the drying time is shorter, less precipitation, subject to