我国玉米干燥的裂纹率问题

对我国玉米干燥时的品质进行了研究并与自然晒干的玉米作了比较。测定了玉米由含水率26％-27％干燥到14％-25％时的裂纹率和裂纹指数。研究了四种粮食干燥机的干燥品质即顺一逆流、横流、混流和蒸汽式干燥机。太阳晒干和蒸汽干燥机干后的玉米裂纹率最少,裂纹指数最低,顺—逆流干燥和横流干燥裂纹率及裂纹指数最高。混流干燥的玉米品质居中,虽不及太阳晒干和蒸汽干燥的,但大大优于横流和顺—逆流干燥机的干燥品质。

Stress-Cracks of Maize Dried in China

The quality of maize artificially dried in China was investigated and compared with sun-dry-ing. The stress cracks and stress-crack index were determined in drying maize from 25%-27%(w. b.) to 14%-15%. Four types of dryer were included in the survey: concurrent-/counter-flow, crossflow,mixed-flow,and steam-type.The sun-dried and steam-dried samples exhibit the fewest number of stresscracks and the lowest stress-crack index, the concurrent-/counter-flow and crossflow-dried maize havethe largest number of stress cracks and the highest stress-crack index.Mixed-flow dryer produced maizeof middle quality, not as good as sun-dried and steam-dried maize but considerably better than crossflow-dried and concurrent-/counter-flow dried maize.