烘焙对厨余垃圾堆肥特性影响  

Impact of Torrefaction on the Properties of Food Waste Compost

作　　者：杨秋[1,2] 顾菁[2] 王亚琢[2] 袁浩然[1,2] 何明阳[1] 孙富安[1] Yang Qiu;Gu Jing;Wang Yazhuo;Yuan Haoran;He Mingyang;Sun Fuan(Changzhou University,Changzhou 213164,Jiangsu,China;Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China)

机构地区：[1]常州大学,江苏常州213164 [2]中国科学院广州能源研究所,广州510640

出　　处：《中国工程科学》2018年第3期109-116,共8页Strategic Study of CAE

基　　金：中国工程院咨询项目"我国能源技术革命的技术方向和体系战略研究"(2015-ZD-09);国家青年科学基金项目(51406207;51606202;51606200);中国科学院青年创新促进会项目(2014320);"广东特支计划"科技青年拔尖人才项目(2014TQ01Z379)

摘　　要：厨余垃圾数量的不断增加对环境造成了严重影响,目前厨余垃圾堆肥化产生的厨余垃圾堆肥品质较差,并且易对土壤造成污染。本文探讨厨余垃圾堆肥在五个不同烘焙温度(250℃、300℃、350℃、400℃和450℃)、停留时间30 min条件下获得固体产物的燃料品质和燃烧特性。结果表明,烘焙对厨余垃圾堆肥样品燃料品质(元素分析、工业分析、热值、Cl含量、质量产率和能量产率)和燃烧特性有明显影响。随着烘焙温度的升高,烘焙固体产物的固定碳和C含量、热值等提高;Cl含量降低,可以有效抑制燃烧过程中二噁英前驱体的生成,减少二次污染。烘焙后的厨余垃圾堆肥的燃烧放热主要在固定碳燃烧阶段,总体燃烧放热量增加,燃烧特性改善。厨余垃圾堆肥的烘焙温度宜选择250~300℃。烘焙预处理对厨余垃圾堆肥燃料特性有明显的改善作用,可以实现厨余垃圾堆肥无害化、减量化和资源化利用。The increasing amount of food waste has serious impacts on the environment.At present,the quality of food waste compost is poor,such that soil is easily polluted.This study explores the fuel properties and combustion characteristics of solid products from torrefied food waste compost at five different torrefaction temperatures(250℃,300℃,350℃,400℃and 450℃)and a residence time of 30 min.The results show that torrefaction has a significant effect on the fuel properties(ultimate analysis,proximate analysis,HHV,Cl content,mass yield,and energy yield)and combustion characteristics of the food waste compost.The fixed carbon and C content,and HHV of the solid products from the torrefied food waste compost increase;the content of Cl decreases,which effectively inhibits generation of dioxin precursors during combustion and reduces secondary pollution.Heat generated during the burning of the food waste compost after torrefaction is mainly in the fixed carbon combustion stage.Following torrefaction,the overall combustion heat discharge increased and the combustion characteristics improved.The torrefaction temperature of the food waste compost should be between 250~300℃.Torrefaction pretreatment improves the fuel characteristics of the food waste compost significantly.Food waste compost can be treated as solid fuels to achieve harmless,reduction and resourceful utilization of food waste compost.

关 键 词：烘焙 厨余垃圾堆肥 生物质 燃料品质 燃烧特性 

分 类 号：TK09[动力工程及工程热物理] X705[环境科学与工程—环境工程]