碳核查与交易需求背景下固定源CO_(2)排放连续监测技术分析  

Technical analysis of continuous monitoring of CO_(2)emissions from stationary sources within the framework of carbon verification and trading requirements

作　　者：朱前林 刘含笑 陈东宝 陆诗建 ZHU Qianlin;LIU Hanxiao;CHEN Dongbao;LU Shijian(Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization,Xuzhou 221008,China;School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221008,China;Key Laboratory of Coal Fired Flue Gas Purification Equipment Research of Zhejiang Province,Feida Environmental Protection Technology Co.,Ltd.,Zhuji 311800,China)

机构地区：[1]江苏省煤基温室气体减排与资源化利用重点实验室,徐州221008 [2]中国矿业大学资源与地球科学学院,徐州221008 [3]浙江菲达环保科技股份有限公司浙江省燃煤烟气净化装备研究重点实验室,诸暨311800

出　　处：《环境工程学报》2024年第10期2764-2773,共10页Chinese Journal of Environmental Engineering

基　　金：浙江省“尖兵”研发攻关计划项目(2021C03SA604102);国家重点专项(SQ2022xjkk02100);国家自然科学基金资助项目(41702248)。

摘　　要：大型固定源排放的二氧化碳(CO_(2))是全球碳排放主要来源,对其排放量进行实时高精度监测是实施碳交易、产品碳足迹及碳税等机制的前提。通过分析CO_(2)排放量监测所涉及的烟气温度、压力、湿度、流速及气体体积分数的监测技术特征,评价现在技术误差对CO_(2)排放量监测精度的影响。在1.5级或2.0级碳排放量监测目标精度要求下,探讨各指标技术的发展需求。结果表明,在现有技术条件下,烟气温度、压力、湿度对CO_(2)排放量监测精度影响较小,选择合适精度与量程的监测仪器满足CO_(2)排放量监测1.5级或2.0级精度难度不大。CO_(2)体积分数与烟气流速监测精度是影响能否实现CO_(2)排放量1.5级或2.0级精度目标的关键。在CO_(2)体积分数监测方面,应尽量采用合适量程的1.0级精度的气体分析仪,必要时需采用多量程气体分析仪。在烟气流速监测方面,目前基于皮托管流速监测的技术与方法尚无法满足该要求,应提高现在基于皮托管的流速监测技术与标准,同时在多通道超声流速监测、烟气紊流影响、流速监测新技术方面展开研究。The CO_(2)emissions from large stationary sources constitute the primary global source of carbon emissions.Real-time and high-precision monitoring of these emissions is essential for implementing carbon trading,conducting product carbon footprint assessments,and levying carbon taxes.By analyzing the technical characteristics of CO_(2)emission monitoring,including flue gas temperature,pressure,humidity,flow rate,and gas volume fraction monitoring,we evaluated the impact of monitoring errors on the accuracy of CO_(2)emission monitoring.We discussed the performance requirements for each monitoring indicator in line with precision targets of 1.5 or 2.0 level carbon emission accuracy.Our findings indicate that flue gas temperature,pressure,and humidity have a minor impact on the accuracy of CO_(2)emission monitoring.Therefore,appropriate monitoring instruments with suitable accuracy and range can readily achieve the 1.5 or 2.0 level accuracy in CO_(2)emission monitoring.The accuracy of CO_(2)volume fraction and flue gas flow rate monitoring is crucial for meeting the 1.5 or 2.0 level accuracy targets for CO_(2)emission.Concerning CO_(2)volume fraction monitoring,gas analyzers with a precision of 1.0 level and appropriate range,sometimes with multi-range capability if necessary,should be employed.In terms of flue gas flow rate monitoring,the current methods based on Pitot tube flow rate monitoring are inadequate to meet the precision requirements.In is necessary to enhance the current Pitot tube-based flow rate monitoring technology and standards,while simultaneously conducting research on multi-channel ultrasonic flow rate monitoring,the impact of flue gas turbulence,and new technologies for flow rate monitoring.

关 键 词：固定源 碳排放 碳监测 连续监测 精度 

分 类 号：X84[环境科学与工程—环境工程]