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目前我国加工机械的品种和生产能力还很薄弱,特别是农副产品需要的人工干燥机械更是缺少。而农副产品中需要干燥的农产物料种类是多种多样的。需要人工干燥的物料可以分为初加工干燥,即将收获的农产物料直接烘干;深加工干燥,即将农产物料加工后再进行干燥:多层次加工干燥.即物料在加工过程中需要两次或多次干燥。由于需要干燥的物料种类不同,所采用的干燥工艺也是不相同的。按需要干燥的物料外形分有:颗粒状(球形)、片状、粉状、长条状、叶片状及液态、半液态状。按物料在干燥机内的干燥状态分有:堆放固定干燥式、流动干燥式、喷雾干燥式和吊挂干燥式。还有的在干燥前需要加工处理的,如水浸后干燥的,蒸煮后干燥的,炒后干燥的,粉碎
At present, China’s processing machinery varieties and production capacity is still very weak, especially agricultural and sideline products need artificial drying machinery is lacking. The types of agricultural products that need to be dried in agricultural products are varied. The materials that need artificial drying can be divided into primary processing and drying, the agricultural materials about to be harvested are directly dried, the deep processing and drying is about to dry the agricultural materials after processing: multi-level processing and drying, that is, the material needs to be processed twice or Dry several times. Due to the different types of materials that need to be dried, the drying process used is not the same. According to the need to dry the material shape points are: granular (spherical), flake, powder, strip, leaf and liquid, semi-liquid state. According to the material in the dryer dry state is divided into: stacked fixed drying, mobile drying, spray drying and hanging drying. There are still need to be processed before drying, such as after the water-immersion dry, cooked dry, fried dry, crushed