碱处理水稻秆对成型工艺的影响分析

Effect of Alkali Treatment on Straw Forming Technology

以水稻秆颗粒为原料,通过NaOH处理制成生物质成型燃料的粘结剂,采用三因子二次正交旋转试验设计,研究NaOH质量分数、碱处理温度和碱处理时间对成型燃料剪切粘结强度的影响。利用SPSS13.0的回归分析方法以及Matlab 7.1的响应面分析法,建立并分析了3个因子对剪切粘结强度影响的数学模型。结果表明,所得回归方程显著,拟合情况良好;3个因子对剪切粘结强度的影响大小依次为:碱处理温度、NaOH质量分数、碱处理时间;最佳碱处理温度为95℃,NaOH质量分数为1.5%,碱处理时间为17 h,剪切粘结强度达到2.608 MPa。

Particles of rice straw processed by sodium hydroxide can be used as binder in biomass fuel.The quadratic orthogonal rotation design with three factors was used to study the effects of the mass fraction of NaOH,temperature,and reaction time of alkali treatment on shear bond strength.Functional models of shear bond strength with three factors were established and analyzed by regress method in SPSS13.0 and response method in Matlab 7.1.The results show that the regression equation was effective,and the mathematical model for the simulation was presented.The effect order of three factors was as follows： the processing temperature,the amount of consistency,reaction time.The optimum conditions were 1.5% of consistency,95℃ of temperature and 17 h of reaction time.