复合粘结剂对生物质成型颗粒密度与能耗的影响  

EFFECT OF COMPOSITE BINDERS ON DENSITY AND ENERGY CONSUMPTION OF BIOMASS BRIQUETTES

作　　者：蔡键 司耀辉[2] 邵敬爱[2] 米铁[1] 张世红[2] 陈汉平[2] Cai Jian;Si Yaohui;Shao Jing’ai;Mi Tie;Zhang Shihong;Chen Hanping(Hubei Key Laboratory of Industrial Fume&Dust Pollution Control,Jianghan University,Wuhan 430056,China;State Key Laboratory of Coal Combustion,Himzhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]江汉大学工业烟尘污染控制湖北省重点实验室,武汉430056 [2]华中科技大学煤燃烧国家重点实验室,武汉430074

出　　处：《太阳能学报》2020年第5期196-203,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51876077,51476067);江汉大学开放课题(HBIK2016-02)。

摘　　要：以棉秆、麦秆和油菜秆为原料,通过向其中加入不同的复合粘结剂于台式模压单元上进行成型实验来考察生物质成型颗粒的特性。结果发现,对于棉秆和麦秆而言,加入粘结剂后的成型颗粒比未添加粘结剂的成型颗粒的松弛密度大幅提高,并且能耗减少20%以上。综合考虑成型颗粒品质、能耗以及经济成本等因素,棉秆和麦秆成型颗粒的最优复合粘结剂(羧甲基纤维素、Al2O3、Fe2O3和黏土)的质量比分别为4∶4∶5∶7和3∶5∶6∶6,而油菜秆由于自身特性,需进一步探讨其最佳成型方式。通过红外光谱和金相显微镜图像分析,粘结剂中的羧甲基纤维素与成型颗粒中微小粒子相互交联形成"桥键"加强原料粒子间的粘结力,但由于油菜秆中提取物含量较高,导致原料粒子表面形成的角质层阻碍粘结剂与原料粒子之间的相互作用。In the paper,cotton stalk,wheat straw and rape straw acted as the material. The biomass pellet properties were investigated by conducting a series of briquetting experiments on a bench top press unit. It was found that the relax density of cotton stalk and wheat straw were increased significantly and the energy consumption was reduced by over 20% compared with that of the briquettes without binder material. The optimal compound binder proportions of cotton stalk and wheat straw were 4∶4∶5∶7 and 3∶5∶6∶6,respectively,considering the pellet quality,energy consumption and economic cost. But the optimal shaping condition of rape straw needs to be further discussed for its special features. Through the infrared spectrum and metallographic microscope image analysis,it was due to carboxymethyl cellulose of binders and tiny particles of the biomass briquette attracted with each other and strengthened interlocking bonds through fabricating"solid bridge". But for rape straw it had high extract content,a layer of cuticle formed on the surface of particles,which hindered the interaction between the binder and raw material particles.

关 键 词：生物质 成型颗粒 能耗 复合粘结剂 桥键 

分 类 号：TK16[动力工程及工程热物理—热能工程]