生物质燃料替代煤炭在烟叶烘烤中的应用

The Application of Biomass Fuel Substituting Coal in Tobacco Curing

为研究生物质燃料在烟叶烘烤应用上的可行性,以前期筛选出的最佳生物质燃料配方50%木屑+50%烟秆为原料,利用HCK045A型高效生物质颗粒机压制成直径8 mm的颗粒燃料,以此作为替代能源进行了烟叶烘烤试验。试验共设置T0(0替代,CK)、T1(30%替代)、T2(50%替代)、T3(70%替代)、T4(100%替代)5个处理,对烘烤中不同处理烤房的干湿球温度、烤房综合热效率、烤后烟叶化学成分及协调性、燃烧烟气中污染物含量、烤后烟叶经济性状及烘烤成本等指标进行了比较研究。结果表明:不同替代程度的生物质燃料所加热的烤房,在变黄期和定色期干湿球温度上升较快,干筋期上升较慢,烤房热效率较高;烤后烟叶化学成分适中、协调性较好;烘烤时排放烟气中的主要污染源物质SO2含量显著降低,尤其是T4处理的排放量只有CK的4.17%;由于生物质燃料烘烤用工和能耗成本的增加导致整体烘烤成本有所升高,T1幅度最小为1.72%,T4升幅较大,达20.62%,但由于生物质燃料烘烤的烟叶中上等烟比例增加,最后的产值仍然提升,其中T1增加幅度最大,达22.91%。

In order to study the feasibility of using biomass fuel in tobacco curing,on the base of early research results,the text used the formula 50%wood chips plus 50%tobacco stem as materials to produce 8 mm-diameter pellet fuel by an efficiency biomass pellet machine(HCK045A).Five treatments were used during tobacco curing,including T0(100%coal)as contrast,T1(30%biomass fuel plus 70%coal),T2(50%biomass fuel plus 50%coal),T3(70%biomass fuel plus 30%coal)and T4(100%biomass fuel).Indexes including dry and wet bulb temperature,comprehensive thermal efficiency,chemical components of flue-cured tobacco leaves,pollutants content of combustion gas,economic characters and curing cost of different treatments were analyzed.The results showed that,the curing barn which used biomass fuel warned up more quickly during yellowing stage and leaf-drying stage than the curing barn which used coal but slower during stem-drying stage and the thermal efficiency was higher.The chemical components of cured tobacco leaves were more suitable and the coordination was better.The content of main pollutant SO 2 of combustion gas from the curing barn which used biomass fuel reduced significantly,especially the content of treatment T4 only was 4.17%of CK.The curing cost increased because the increasing of labor and materials,and the range of T1 was lowest(1.72%)but that of T4 was highest(20.62%).However,due to the higher ratio of mid-high grade leaves the output values of curing treatments with biomass fuel all increased,especially the range of T1 was highest and extended 22.91%.