可燃垃圾与煤粉混合燃烧特性及动力学分析  

CO-COMBUSTION CHARACTERISTICS AND KINETIC ANALYSIS OF COMBUSTIBLE WASTE AND PULVERIZED COAL

作　　者：张红玉 江滔[1] 张元勤[1] ZHANG Hong-yu;JIANG Tao;ZHANG Yuan-qin(College of Chemistry,Leshan Normal University,Leshan 614004,China)

机构地区：[1]乐山师范学院化学学院,四川乐山614004

出　　处：《环境工程》2020年第9期185-189,共5页Environmental Engineering

摘　　要：采用热重分析法对可燃垃圾、煤粉及其混合燃料的燃烧特性进行了分析。研究结果表明:可燃垃圾的热重曲线在220~500℃内存在2个明显的失重区域,煤粉在300~600℃内只有1个失重区域。可燃垃圾着火性能较好,着火点为220℃,可燃垃圾与煤粉混烧时的着火点较可燃垃圾单独燃烧时略有提高,但明显低于煤粉单独燃烧时320℃的着火点。可燃垃圾和煤粉按照2∶1、3∶1、4∶1、5∶1混烧时,基本保持垃圾的着火特性,当可燃垃圾的掺混量≤80%时,可燃垃圾和煤粉混烧时两者之间存在明显的协同促进作用。可燃垃圾的综合燃烧特征指数为3.91×10-7/(min 2·K 3),明显高于煤粉,可燃垃圾的添加能提高煤粉的综合燃烧性能,其中可燃垃圾∶煤粉=4∶1为掺混比例最佳。燃烧动力学分析结果表明:在220~330℃燃烧阶段,混合燃料的活性高于可燃垃圾,在320~570℃高温燃烧阶段,混合燃料的活性略低于可燃垃圾,但是远高于煤粉。可燃垃圾的掺烧量对2个燃烧阶段混合燃料的活性影响不大。In this study,the combustion characteristics of combustible waste,pulverized coal and their mixture were analyzed by thermogravimetric analysis.The results showed that the thermogravimetric curves of combustible waste had two obvious weight loss regions in the temperature range of 220~500℃,and only one obvious weight loss region of pulverized coal in the temperature range of 300~600℃.Combustible waste had good ignition performance,and the ignition point was 220℃.The ignition point of combustible waste mixed with pulverized coal was slightly higher than that of the combustible waste,but it was also obviously lower than that of pulverized coal combustion alone.Mixed combustion basically maintained the ignition characteristics of the combustible waste,when mixed with pulverized coal.When the blending proportion of combustible waste was not more than 80%,there was an obvious synergistic promoting effect between combustible waste and pulverized coal mixed combustion.The comprehensive combustion characteristic index of combustible waste was 3.91×10-7/(min 2·K 3),obviously higher than that of the pulverized coal.The addition of the combustible waste could improve the comprehensive combustion performance of the pulverized coal,and the best ratio of combustible waste to pulverized coal was 4∶1.The results of combustion kinetic analysis showed that the activity of the mixed fuel was higher than that of the combustible waste at 220~330℃combustion stage,and the activity of the mixed fuel was slightly lower than that of the combustible waste at 320~570℃combustion stage,but much higher than that of the pulverized coal.The addition amount of the combustible waste had little influence on activity of the mixed fuel in the two combustion stages.

关 键 词：可燃垃圾 煤粉 燃烧 热重分析 动力学分析 

分 类 号：X705[环境科学与工程—环境工程]