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目前,我国农业、粮食系统共有各类烘干机6000余台(套),每年需耗用大量的常规能源。通常情况下,蒸发每公斤的热耗量为5439～7796千焦,最低的也需4184千焦,最高的达8368千焦。与国外一般蒸发每公斤水的热耗量为3347～5020千焦相比,说明农副产品烘干过程中的节能潜力很大。对各种类型烘干机,可根据其特点,采用以下节能措施: 一、采用余热回收预热湿粮新工艺废气余热利用简单易行的方法是预热湿粮。通过预热,提高湿粮温度;此外,利用废气余热
At present, there are totally 6,000 sets of drying machines of various kinds in our country’s agriculture and food systems, and a large amount of conventional energy needs to be consumed each year. Under normal circumstances, the heat consumption per kg of evaporation is 5439 ~ 7796 kJ, the lowest also need 4184 kJ, the highest of 8368 kJ. Compared with the average heat consumption per kilogram of water in foreign countries of 3347 ~ 5020 kJ, the energy saving potential of agricultural and sideline products during drying is very high. For all types of dryers, according to their characteristics, the following energy-saving measures: First, the use of waste heat recovery preheating wet food new waste heat treatment technology is easy to use waste heat preheated wet food. By preheating, wet food temperature increase; In addition, the use of exhaust heat