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《中国工程科学》 >> 2018年 第20卷 第3期 doi: 10.15302/J-SSCAE-2018.03.016

烘焙对厨余垃圾堆肥特性影响

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

资助项目 :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) 收稿日期: 2018-04-20 修回日期: 2018-05-10

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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。

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