园林垃圾对市政污泥热解过程减量及含碳物质变化的影响  

Effects of garden waste on the reduction of sewage sludge pyrolysis process and the change of carbon-containing substances

作　　者：于涛[1] 俞存天 张婷[2] 肖懿 李东阳[2] 杨天学[2] 黄启飞[2] 席北斗[2] 卢欢亮 YU Tao;YU Cuntian;ZHANG Ting;XIAO Yi;LI Dongyang;YANG Tianxue;HUANG Qifei;XI Beidou;LU Huanliang(School of Petrochemical Engineering,Lanzhou University of Technology;Chinese Research Academy of Environmental Sciences;Guangdong Provincial Academy of Environmental Sciences)

机构地区：[1]兰州理工大学石油化工学院 [2]中国环境科学研究院 [3]广东省环境科学研究院

出　　处：《环境工程技术学报》2025年第1期289-296,共8页Journal of Environmental Engineering Technology

基　　金：广东省环保专项资金项目(粤财资环〔2023〕12号);黄河流域生态保护和高质量发展联合研究项目(2022-YRUC-01-050205-03);国家重点研发计划项目(2020YFD1100301-04)。

摘　　要：市政污泥(SS)的高含水率、高灰分、高热解耗能、低产物品质等特点,制约其热解资源化技术的应用。向SS中添加比自身热值和有机物含量更高的园林垃圾(GW)进行共热解,通过热重分析仪、气相色谱质谱仪等测定其减量效果与物质组成,并采用Coats-Redfern法分析了热解动力学。结果表明,SS与GW共热解过程中主要分为失水、挥发分分解、难降解有机物分解3个阶段;GW和SS共热解后可以降低活化能,热解反应向低温段偏移,当GW掺入量为50%时,挥发分分解阶段(155~380℃)活化能为4.64 kJ/mol,比SS单独热解减少10.25%;此外,共热解还可减少二次污染物的产生,在GW掺入量为50%时,热解后热解油中的有机碳氧化合物、脂烃类质量分别由单独热解的376和94 mg/g降为252和30 mg/g。基于以上研究结果,GW可以减少SS热解的能源投入,降低污染物的产生,为SS与GW减量化及资源化实际工程提供理论支撑。Due to the high water content,high ash content,high energy consumption in pyrolysis,and low product quality of municipal sewage sludge(SS),it has become a bottleneck restricting the application of SS pyrolysis resource technology.Garden waste(GW)with higher calorific value and organic matter content was added to SS for co-pyrolysis.The reduction effect and material composition were determined through thermogravimetric analyzer,gas chromatography-mass spectrometer,etc.,and the pyrolysis kinetics was analyzed using Coats-Redfern method.The results showed that the co-pyrolysis process of SS and GW was mainly divided into three stages:water loss,volatile decomposition,and decomposition of refractory organic matter.After co-pyrolysis of GW and SS,the activation energy could be reduced,and the pyrolysis reaction was shifted towards the low-temperature range.When GW dosage was 50%,the activation energy in the volatile decomposition stage(155-380℃)was 4.64 kJ/mol,which was 10.25%less than that of SS pyrolysis alone.In addition,co-pyrolysis could also reduce the generation of secondary pollutants.When GW dosage was 50%,the contents of organic carbon oxides and aliphatic hydrocarbons in the pyrolysis oil after pyrolysis were reduced from 376 and 94 mg/g in the case of individual pyrolysis to 252 and 30 mg/g,respectively.Based on the above research results,it was indicated that GW could reduce the energy input for SS pyrolysis and decrease the generation of pollutants,providing theoretical support for the reduction and resource utilization practical projects of SS and GW.

关 键 词：市政污泥 园林垃圾 共热解 动力学 碳素形态 

分 类 号：X799.3[环境科学与工程—环境工程]