面向“双碳”战略的印染污泥干化焚烧技术经济环境综合评价研究  

Research on Comprehensive Economic and Environmental Evaluation of Printing and Dyeing Sludge Incineration Technology Targeting‘Dual Carbon’Strategy

作　　者：吕洪炳 陈理帅 吴光华 陈东波 俞彩孟 柳兆印 张东明 田金平[2] 陈亚林[2] 陈吕军[2] LU Hongbing;CHEN Lishuai;WU Guanghua;CHEN Dongbo;YU Caimeng;LIU Zhaoyin;ZHANG Dongming;TIAN Jinping;CHEN Yalin;CHEN Lüjun(Zhejiang Zheneng Xingyuan Energy Saving Technology Co.,Ltd.,Hangzhou 311121,China;School of Environment,Tsinghua University,Beijing 100084,China)

机构地区：[1]浙江浙能兴源节能科技有限公司,浙江杭州311121 [2]清华大学环境学院,北京100084

出　　处：《环境科学研究》2024年第9期1877-1884,共8页Research of Environmental Sciences

基　　金：浙江省“尖兵”“领雁”研发攻关计划项目(No.2023C03008);国家自然科学基金项目(No.72274103)。

摘　　要：污泥干化焚烧热电联产是印染行业减污降碳的重要举措,污泥焚烧过程中控制煤炭添加比例(煤泥比)是这类项目核准和运行考核的重要指标,本研究旨在解决污泥低煤炭掺烧面临的经济收益和减碳绩效平衡问题,以期为类似工程提供借鉴。依托华东某印染园区2500t/d污泥焚烧项目,基于煤泥比不超过20%的管理要求,构建集成技术经济分析和生命周期评价的多目标优化模型,运用NSGA-II算法,揭示热电比、污泥含水率、固体回收燃料(SRF)掺烧比例等指标对项目经济性和碳排放的影响。结果表明:①当案例项目的热电比从50%提高到100%时,价格差异使经济效益提高22.0%,但碳排放平均增长约8.0%。②在稳定运行前提下,当入炉污泥含水率由45%提高到55%,入炉混合燃料量由36.7 t/h提高到41.8 t/h,原煤用量分别为7.3和8.3 t/h时,可使供热量增加28.1%、供电量增加18.1%,项目经济性提高,但该工况下化石碳排放增加。③可通过提高入炉污泥含水率使Pareto前沿面向项目经济效益提高且碳排放水平减少的方向移动,同时较高入炉污泥含水率下可通过恰当的经济性的降低获得较大的碳减排,污泥焚烧项目不应单纯追求入炉污泥的低含水率。④针对因污泥量不足导致的锅炉负荷低的情况,可通过掺加SRF稳定锅炉负荷,保持运行经济性;在污泥足量情况下,掺加SRF可替代部分煤炭,降低煤炭掺烧的碳排放。研究显示,印染污泥干化焚烧热电联产具有良好的经济效益和减污降碳效应,面向“双碳”战略,需要加快建立工业园区能源系统整体优化和污泥焚烧处置长效机制,优化技术模式,加强区域资源优化配置。The cogeneration of sludge through drying and incineration is an important initiative for reducing pollution and carbon emissions in the printing and dyeing industry.The control of the coal-to-sludge ratio during the incineration process is a crucial indicator for both project approval and operational assessment.This study aims to examine the trade-off between the economic benefits and carbon reduction performance of low-coal co-incineration of sludge and to provide guidance for similar projects.Based upon a 2500 t/d sludge incineration project in a dyeing and printing industrial park in East China,we developed a multi-objective optimization model integrating both techno-economic analysis and life cycle assessment.The NSGA-II algorithm was employed to reveal the impacts of factors such as the cogeneration ratio,the sludge moisture content,and the co-incineration of solid recovered fuel(SRF)on the economic feasibility and carbon emissions of the project.The results show that:(1)Increasing the cogeneration ratio from 50% to 100% resulted in a 22.0% improvement in economic benefits and an average carbon emissions increase by approximately 8.0%.(2)Under stable operations,increasing the inlet sludge moisture content from 45% to 55% and the mixed fuel quantity from 36.7 t/h to 41.8 t/h,with coal consumption at 7.3 t/h and 8.3 t/h,respectively,resulted in a 28.1%increase in heat supply and an 18.1%increase in electricity generation.This will enhance the economic feasibility of the project while also escalating fossil carbon emissions.(3)Increasing the moisture content of sludge prior to incineration shifts the Pareto frontier towards improved economic performance while simultaneously reducing carbon emissions.Optimizing for higher moisture content achieves substantial carbon reductions with only minor compromises in economic feasibility.Therefore,sludge incineration projects should not solely focus on minimizing sludge moisture content.(4)Adding SRF to stabilize the boiler load is a feasible solution to solve the proble

关 键 词：印染污泥 低煤炭掺烧 碳排放模型 经济模型 多目标优化 

分 类 号：X705[环境科学与工程—环境工程]