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针对生物质气化燃气的低位热值受气化温度、蒸汽与生物质质量配比(简称质量配比)及当量比等多种因素影响,且这些因素又相互作用的实际情况,采用正交设计的试验方法研究上述3个主控因素对生物质气化燃气低位热值影响的敏感程度,再用极差分析和方差分析方法对试验结果进行分析,得到影响燃气低位热值的显著性关系以及因素组合的最佳水平。试验结果表明:在试验条件范围内,各因素及其交互作用对热值影响的主次顺序为:当量比>气化温度>质量配比>质量配比与当量比的交互作用>气化温度与质量配比的交互作用>气化温度与当量比的交互作用,其中当量比、气化温度、质量配比对燃气低位热值的影响特别显著。交互作用分析获得生物质气化制取燃气的优化方案:气化温度750℃,质量配比0.75,当量比0.25,在该条件下燃气的低位热值最高(6.530 MJ/m3)。
In view of the fact that the low calorific value of biomass gasification gas is affected by many factors such as gasification temperature, mass ratio of steam and biomass (equivalent mass ratio) and equivalent ratio, and the interaction of these factors, orthogonal design The sensitivity of the above three main control factors to the low calorific value of biomass gasification gas was studied. The analysis of the test results was conducted by using range analysis and variance analysis, and the significant relationship between the low calorific value of gas and The best combination of factors. The experimental results show that the main order of each factor and its interaction on the calorific value is: equivalence ratio> gasification temperature> mass ratio> mass ratio vs equivalence ratio within the experimental conditions> gasification temperature Interaction with mass ratio> interaction between gasification temperature and equivalence ratio. The effects of equivalence ratio, gasification temperature and mass ratio on the low calorific value of gas are particularly significant. Interaction Analysis Biomass gasification to obtain gas optimized program: gasification temperature of 750 ℃, the mass ratio of 0.75, equivalent ratio of 0.25, under the conditions of the lowest gas calorific value (6.530 MJ / m3).