毛竹焙烧炭成型工艺优化及其燃烧特性研究  

Process optimization for molding of moso torrefacted coal and its combustion performance

作　　者：梁广元 张芊[1] 孙毅 李文珠[1] 刘萌萌 张文标[1] 

机构地区：[1]浙江农林大学工程学院,浙江临安311300 [2]山东省产品质量检验研究院,济南250102

出　　处：《林业工程学报》2016年第6期75-81,共7页Journal of Forestry Engineering

基　　金：浙江省林业工程学科创新团队基金(206001000710);国家科技部农业科技成果转化项目(2010GB2C200175);浙江省农业科技成果转化项目(2012T201-06)

摘　　要：为提高毛竹焙烧炭的成型品质及其燃烧性能,笔者以毛竹焙烧炭为原料,采用响应曲面法,选取热值、密度、抗压性、破碎率和渗水性作为响应值,对施胶量、含水率和粒径3个因素进行优化,确定最佳成型工艺,并通过锥形量热仪,采用不同辐射热通量对成型炭的点燃特性、质量损失特性、热释放特性以及烟气释放特性进行测定。结果表明:毛竹焙烧炭的最佳成型工艺为施胶量46%,含水率10%和粒径03~05 mm,制得成型炭的热值为2919 MJ/kg,密度为1095 g/cm^3,破碎率为374%,抗压性为3419 N/cm,渗水性为092%;随辐射热通量的增加,成型炭的点燃时间缩短,热释放速率均值、热释放速率峰值、热释放总量和烟释放速率及产烟量增加,产生的CO减少,CO_2增加,质量损失和质量损失速率均值都有所增加。In order to enhance the quality of molded coal, the response surface methodology was used to optimize the molding process, in which three factors, namely adhesive addition, moisture content and particle size were dominant. Five response values were collected, namely calorific value, density, pressure resistance, crushing rate and water per- meability, to achieve the optimum molding technology. The achieved optimum molding technology was 46% adhesive ad- dition, 10% moisture content, and O. 3-0. 5 mm particle size. Using this optimum molding technology, the calorific val- ue of 29. 19 MJ/kg, density of 1. 095 g/cm3, crushing rate of 3.74%, pressure resistance of 34. 19 N/cm, and water permeability of 0.92% of the molded coal were achieved. Then the molded coal made in the optimum molding technology was combusted in the cone calorimeter in the condition of different radiant heat fluxes to analyze the ignition property, mass loss, heat releasing property and smoking releasing property. The results indicated that with an increase in radiant heat flux, the ignition time of the fuel was shortened, both average and peak heat release rates and the total heat release were increased. The smoke release rate and smoke amount increased, CO content decreased while CO2 content increased. The average mass loss and average mass loss rate were both increased.

关 键 词：毛竹焙烧炭 成型工艺 响应曲面法 成型炭 燃烧特性 

分 类 号：TQ351[化学工程]