一、背景与现状(?)世界糙米的年产量大约为5亿吨,其中米壳约占20%,一些燃料紧张的国家,人们将谷壳当作燃料。在推行一年两作或三作的地区,必须在雨季收获,而雨季的干燥效率很低,所以利用干燥机烘干是很有必要的。现在出售的烘干机大都是燃油的,因而不太适合那些缺 I. Background and Current Situation (?) The annual output of brown rice in the world is about 500 million tons, of which about 20% is rice husk. In some fuel-stressed countries, people use husk as fuel. In the areas where two or three crops are introduced in one year, it must be harvested in the rainy season, while the drying efficiency in the rainy season is very low. Therefore, it is necessary to use the dryer for drying. Dryer is now sold mostly fuel, which is not suitable for those missing