市政污泥燃烧特性的动力学和热力学分析

李腾浩; 王胤; 刘波; 张杉; 白雪

doi:10.13205/j.hjgc.202607005

市政污泥燃烧特性的动力学和热力学分析

doi: 10.13205/j.hjgc.202607005

李腾浩^1,2,
王胤¹,
刘波¹,
张杉¹,
白雪^1, ,

1. 中国市政工程西南设计研究总院, 成都 610000;
2. 大连海事大学卓越工程师学院, 辽宁大连 116000

详细信息

作者简介:
李腾浩（2002—），男，硕士研究生，主要研究方向为固废资源化与处置。1252716124@qq.com

通讯作者:
白雪（1991—），女，高级工程师，主要研究方向为固废资源化与工程环境污染控制。bxsnow1234@163.com

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出版历程
- 收稿日期: 2026-01-22
- 网络出版日期: 2026-09-01

Kinetic and thermodynamic analysis of municipal sludge combustion characteristics

LI Tenghao^1,2,
WANG Yin¹,
LIU Bo¹,
ZHANG Shan¹,
BAI Xue^{1
, ,}

1. Southwest Municipal Engineering Design & Research Institute, Chengdu 610000, China;
2. College of Excellent Engineers, Dalian Maritime University, Dalian 116000, China

摘要

摘要: 为优化市政污泥焚烧工艺、提升处置效率，以成都第一污水处理厂市政污泥为研究对象，基于同步热分析技术，对热重、微分热重及差示扫描量热信号进行综合分析，在空气气氛、升温速率为20 K/min条件下，揭示了市政污泥燃烧过程的特性演化及其分阶段动力学与热力学行为。为验证Coats-Redfern积分法计算结果的准确性，同时采用了Achar-Brindley-Sharp微分法进行对比计算。结果表明：市政污泥燃烧过程可划分为水分蒸发、挥发分燃烧、固定碳燃烧和燃尽4个阶段，其中，主要热释放集中于挥发分燃烧和固定碳燃烧阶段。污泥着火温度为220.7 ℃，燃尽温度为605.9 ℃，综合燃烧特性指数为6. 32×10^-8 %²/(min²·K³)，表现出良好的燃烧稳定性。动力学分析表明，水分蒸发和挥发分燃烧阶段符合一级反应模型，固定碳燃烧和燃尽阶段符合二级反应模型；2种方法所得表观活化能偏差均在15%以内，验证了Coats-Redfern积分法结果的可靠性。CR积分法求得的市政污泥燃烧4个阶段表观活化能分别为52.24，48.81，192.38，102.27 kJ/mol。热力学分析显示，各阶段熵变均为负值，吉布斯自由能均为正，说明污泥焚烧过程需外部能量驱动，高温燃尽阶段能量需求较高。研究结果可为市政污泥焚烧工艺优化提供参考。
- 市政污泥 /
- 燃烧特性 /
- 热重分析 /
- 动力学 /
- 热力学
Abstract: To optimize the municipal sludge incineration process and improve disposal efficiency， municipal sludge from the First Sewage Treatment Plant in Chengdu was selected as the research object， and synchronous thermal analysis technology was employed to comprehensively analyze the thermogravimetric （TG）， derivative thermogravimetric （DTG）， and differential scanning calorimetry （DSC） signals. To verify the accuracy of the Coats-Redfern （CR） integral method， the Achar-Brindley-Sharp （ABS） differential method was additionally employed for comparative calculation. The combustion characteristics， as well as the staged kinetic and thermodynamic behaviors of the sludge， were investigated in air atmosphere at a heating rate of 20 K/min. The results showed that the combustion process can be divided into four stages： moisture evaporation， volatile combustion， fixed carbon combustion， and burnout. The main heat release is concentrated in the volatile combustion and fixed carbon combustion stages. The ignition temperature of the sludge is 220.7 ℃， the burnout temperature is 605.9 ℃， and the comprehensive combustion characteristic index is 6. 32×10^-8 %²/(min²·K³， indicating good combustion stability. Kinetic analysis revealed that the moisture evaporation and volatile combustion stages follow the first-order reaction model （F1）， while the fixed carbon combustion and burnout stages conform to the second-order reaction model （F2）. The apparent activation energies obtained by the two methods deviated by less than 15%， confirming the reliability of the CR results. The apparent activation energies for each stage were 52.24， 48.81， 192.38， 102.27 kJ/mol， respectively. Thermodynamic analysis indicated that the entropy change （ΔS） is negative and the Gibbs free energy （ΔG） is positive in all stages， demonstrating that the sludge incineration process requires external energy input， with higher energy demand in the high-temperature burnout stage. These findings provide a theoretical reference for optimizing municipal sludge incineration processes.
- municipal sludge /
- combustion characteristics /
- thermogravimetric analysis /
- kinetics /
- thermodynamics

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参考文献(16)

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