生物质气化烤烟系统设计及节能与品质改善效果分析

Design of tobacco-curing system using biomass gas as energy and evaluation of its energy efficiency and quality improvement of tobacco products

针对传统间接换热式烤房存在的能源利用效率低 ,烤烟质量不易保证的问题 ,研究设计了一套以生物质燃气为能源 ,采用间接换热与直接换热相结合的方法进行烘烤的烤烟设备 ,通过这种改进 ,不但使烤烟房的效率有了较大幅度提高 ,而且由于直接换热过程中烟气所携带的 CO2 有助于提高烤烟的质量 ,加之温湿度自动控制系统的采用 ,使得烤烟质量得以保证。实验表明该系统节能及品质改善效果都较传统间接换热式烤房有显著提高 ,系统热效率达 5 8.3 % ,烟叶质量较对照传统烤房提高了 1个等级。

In order to improve the heat efficiency of the traditional tobacco curing chamber and raise the tobacco quality cured, a new tobacco curing system was studied. It makes advances in two aspects: the first one is using biomass gas as a substitute for fossil fuel; the second one is changing the traditional direct heat exchanging mode into combination one which consists of direct and indirect heat exchanging. There are two advantages of the improvements, the first one is that the heat can be utilized more efficiently, the second one is that the quality of the tobacco can be raised because the CO 2 concentration in the drying gas is lower than 1.35% carried by the flue gas. Experimental results that the heat efficiency of the new system can reach 58.3%, and the quality of the cured tobacco can be upgraded compared to that with traditional curing process, as well, the curing time is 15 hours shorter than that of the traditional one.