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在粮食、干鲜果品、木材、皮革、橡胶和制药等许多工、农业产品的加工过程中,都少不了大量消耗能源的干燥处理作业,有的国家用于物料干燥方面的能耗高达总能耗的25%,我国约占10%,1984年我国煤炭的总消费量为74.418万吨,用于物料干燥的估计为七千万吨上下,因此物料干燥的节能是一个大有可为的领域。就物料干燥工艺来源,我国目前不少还采用自然干燥、地坑加热……等落后工艺,用这些方法,既不能保证产品质量,能源利用率又太低。因此,找出一个既保证产品质量,又节约能源的干燥方法,具有十分重要的意义,而这也正是发展太阳能干燥热泵除湿干燥等先进干燥技术的主要目的。
In the processing of many agricultural and agricultural products such as grain, dried fruit, timber, leather, rubber, and pharmaceuticals, a large number of energy-intensive drying operations are indispensable. In some countries, the energy consumption for material drying is as high as the total energy consumption. 25% of our country accounts for about 10%. In 1984, the total coal consumption in China was 7.4418 million tons, and the material used for drying was estimated to be about 70 million tons. Therefore, the energy saving of material drying is a promising area. As for the source of material drying technology, many of our country still uses natural drying, pit heating, and other backward processes. With these methods, product quality cannot be guaranteed, and energy efficiency is too low. Therefore, it is of great significance to find a drying method that guarantees product quality and saves energy. This is the main purpose of developing advanced drying technologies such as dehumidification and drying of solar heat pumps.