将国槐园林废弃物分别在240、320、400、480 ℃下热解,进行工业分析、元素分析、热值分析及热重试验,选择燃烧特性最佳的作为生物炭原料,采用响应面法及蚁群算法对其成型工艺参数进行响应优化研究。结果表明,国槐园林废弃物热解温度为480 ℃时,固定碳含量67.67%,热值5713.70 kcal/kg,综合燃烧特性指数0.0944×10-8 mg2/K3·min2,挥发分析出特性指数0.1093×10-4 mg/K2·min,满足I级生物炭指标要求,是最佳成型原料,其最佳成型工艺参数为：温度84 ℃、压强111 MPa、黏结剂占比18%、含水率18%,在此条件下燃料密度及抗跌碎性分别为1.0347 gcm3及98.722%。
Abstract
The Sophora japonica garden waste was pyrolyzed at 240 ℃, 320 ℃, 400 ℃ and 480 ℃, respectively, and industrial analysis, elemental analysis, calorific value analysis and thermogravimetric test were carried out to select the biochar with the best combustion characteristics as the raw material of biochar, and the response optimization of the molding process parameters was carried out using the response surface methodology and ant colony algorithm for the parameters of its molding process. The results show that when the pyrolysis temperature of Sophora japonica garden waste is 480 ℃, the fixed carbon content is 67.67%, the calorific value is 5713.70 kcal/kg, the comprehensive combustion characteristic index is 0.0944×10-8 mg2/K3·min2, and the volatility analyzed characteristic index is 0.1093×10-4 mg/K2·min2, which meets the requirement of Grade I biochar and makes it the best raw material for molding. The optimal molding process parameters are as follows： the temperature is 84 ℃, the pressure is 111 MPa, the percentage of binder is 18%, and the water content is 18%. Under these conditions, the density and shatter resistance of the fuel were 1.0347 gcm3and 98.722%, respectively.
关键词
燃料 /
燃烧 /
物理特性 /
国槐 /
生物炭 /
农业废弃物
Key words
fuel /
combustion /
physical properties /
Sophora japonica /
biochar /
agricultural residues
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基金
国家燕麦荞麦产业体系重大专项（CARS-07-D-2）; 吕梁市科技计划（农业领域重点研发）（2023NYYF08）; 山西农业大学青年科技创新项目（2020QC08）
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