可调节气流方向的闭式循环热泵烤房的设计应用

摘要

To reduce the coal consumption and environmental pollution of tobacco flue-curing equipment and improve the softness of cured leaves, a closed-loop heat pump curing barn with variable airflow direction was designed. The test results showed that the temperature in the designed barn was controlled accurately and stably, and met the temperature and humidity requirements of bulk curing of flue-cured tobacco. The flow rate of condensate water varied at different curing stages, and decreased continuously with the proceeding of curing. Compared with the tobacco cured by coal-fueled bulk curing barn, the tobacco cured by heat pump barn was softer, shrank more obviously widthwise, had more favorable levels of chemical components and more harmonious chemical compositions, and higher sensory quality scores, the cost of labor and energy reduced by 1.88 RMB yuan per kg cured leaves. This technology provides a support for promoting the curing quality of tobacco.%针对我国燃煤型烟叶烘烤设备能耗高、污染排放大、烤后烟叶欠柔软等问题,设计了一种可调节气流方向的闭式循环热泵烤房,并进行了烘烤试验.结果表明:热泵烤房升温准,控温稳,能够满足烤烟密集烘烤对温湿度的要求.不同烘烤阶段的冷凝水流出速率有较大差别,随着烘烤的进行冷凝水流出速率逐渐下降.热泵烤房烤后烟叶宽度收缩率和柔软性显著高于燃煤密集烤房,烟叶化学成分含量更适宜,化学成分比例更协调,烤后烟叶感官质量综合得分高于燃煤烤房,烘烤用工及能耗成本每kg干烟减少1.88元.该技术可为提高烟叶烘烤质量提供支持.