造纸污泥与褐煤混合燃烧特性及动力学研究  

Combustion Characteristics Analysis and Kinetic Study on Coal/Sludge Blends

作　　者：李玉忠[1,2] 马晓茜[1] 沈超青[1] 蔡梓林[1] 

机构地区：[1]华南理工大学能源高效清洁利用广东普通高校重点实验室,广东广州510640 [2]新会双水发电有限公司,广东江门529000

出　　处：《环境科学与技术》2014年第11期1-6,共6页Environmental Science & Technology

基　　金：国家重点基础研究发展计划(973计划)(2011CB201500);广东省科技计划(2012B091000166);广州市重大科技专项计划项目(2008A1-D0011);中国博士后科学基金资助(2013M531845)

摘　　要：该文通过造纸污泥和褐煤的混合燃烧的热重实验,得到TG和DTG曲线,分析不同混合比例以及不同升温速率（10、20及40 K/min）对燃烧过程的影响,并对燃烧动力学模型的相关参数进行求解,得到了不同燃烧条件下的活化能。研究发现褐煤的燃烧过程有一个明显的失重峰,对应的工况为10 K/min升温速率,其最大失重速率为-7.6%,对应燃烧温度为403.3℃。污泥的燃烧过程分为挥发分和固定碳2个燃烧过程,分别出现在270-575℃和575-727℃之间,采用Coats-Redfern方程计算得到的活化能分别为82.47 kJ/mol和199.26 kJ/mol。污泥与褐煤混合燃烧时,混合试样的最大失重速率随升温速率的提高而增加。通过KAS等转化率及Coats-Redfern方程2种方法分析得出,污泥与褐煤混合燃烧时,污泥的加入可降低混合物着火所需的活化能,降低着火温度,改善燃烧过程。Combustion characteristics and kinetic parameter on coal and paper sludge blends were studied. The experiments were carried out at different heating rates like 10 K/min, 20 K/min and 40 K/min. There was a significant weight loss peak during the combustion of coal. At 10 K/min, the maximum rate of weight loss was 7.6%, corresponding to a temperature of403.3 ℃. The combustion of paper sludge was divided into two processes, the combustion of volatile and fixed carbon, which took place during 270-575 ℃, 575-727 ℃, and their activation energies were 82.47 kJ/mol and 199.26 kJ/mol. Through the experiments, the combustion of the paper sludge could significantly reduce the ignition temperature of the coal.

关 键 词：造纸污泥 褐煤 热重 动力学 

分 类 号：X132[环境科学与工程—环境科学]