摘要
我国电力行业CO_(2)排放量巨大,约占全国CO_(2)排放总量的50%.有效降低电力行业的碳排放,对我国按时实现“3060”碳达峰与碳中和的目标将起到有力支撑.石油和天然气开采过程中产生的油基岩屑因含有较高的热值可作为锅炉煤炭燃料的替代燃料使用.为探明利用燃煤锅炉协同处置油基岩屑的碳减排效果,选取某电站600 MW循环流化床锅炉,以30%的比例掺烧油基岩屑,并参照《温室气体排放核算与报告要求第1部分:发电企业》和《企业温室气体排放核算方法与报告指南发电设施(征求意见稿)》两种核算方法计算协同处置前后锅炉CO_(2)的排放量.结果表明:①在30%的掺加比下,油基岩屑协同处置具有碳减排效果.两种核算方法计算的降碳量分别为159.2和157.7 t,降碳比分别为0.543和0.538.②油基岩屑焚烧产生的CO_(2)排放量小于被替代的煤炭燃烧产生的碳排放量,是协同处置具有碳减排效益的主要原因.③核算法与检测法CO_(2)排放量的差异表明,企业源评估模型碳核算法最主要的不确定性来源于检测数据的精准度.研究显示,燃煤锅炉协同处置油基岩屑具有一定的CO_(2)减排效果,单位热值含碳量和消耗量是影响碳减排效果的两个关键因素,建议开展油基岩屑掺加比与碳减排量间的相关性研究,为规模化开展燃煤锅炉协同处置降碳工作提供参考.
Power industry in China contributes a huge amount of CO_(2) emissions,more than 50%of China′s total CO_(2) emissions come from coal-fired power plants.Effective reduction of CO_(2) emissions in the power industry will make a significant contribution to achieve China′s‘3060’carbon emission peak and carbon neutrality goals.Oil-based drill cuttings produced in the process of oil and natural gas extraction usually have a relatively high calorific value,and it is possible to use them to replace coal,therefore potentially reducing coal consumption and CO_(2) emissions.In order to verify the carbon reduction effect of coal-fired boilers co-processing oil-based drill cuttings,a 600 MW circulating fluidized bed boiler was selected to use 30%of oil-based drill cutting,and two corporate source carbon accounting methods were used to calculate CO_(2) emissions.The results indicate that:(1)The co-processing of 30%of oil-based drill cuttings has a certain degree of CO_(2) emission reduction,and the two accounting methods show 159.2 and 157.7 t of carbon reduction,with reduction ratios of 0.543 and 0.538,respectively.(2)The main reason for the carbon emission reduction in the co-processing is the lower CO_(2) emissions from the incineration of oil-based cuttings than the carbon emissions from the combustion of coal.(3)The difference in CO_(2) emissions obtained by the accounting method and detection method indicates that the most important uncertainty in the corporate source carbon accounting model comes from the accuracy of the detection data.The research shows the co-processing of oil-based cuttings in coal-fired boilers has a certain degree of CO_(2) reduction effect.The carbon content and consumption per calorific value of fuels are two key factors that affect the carbon emission reduction.It is recommended to further study the correlation between the amount of oil-based drill cuttings and carbon emission to provide a scientific basis for carbon emissions reduction in the co-processing of coal-fired boilers.
作者
崔长颢
刘美佳
葛金林
王铭玮
闫大海
CUI Changhao;LIU Meijia;GE Jinlin;WANG Mingwei;YAN Dahai(Research Institute of Solid Waste Management,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;State Environmental Protection Key Laboratory of Hazardous Waste Identification and Risk Control,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China)
出处
《环境科学研究》
CAS
CSCD
北大核心
2022年第2期540-546,共7页
Research of Environmental Sciences
基金
国家重点研发计划项目(No.2018YFC1900100)
中央级公益性科研院所基本科研业务专项(No.2019YSKY-016)。
关键词
循环流化床
协同处置
油基岩屑
碳排放核算
降碳潜力
circulating fluidized bed boiler
co-processing
oil-based drill cutting
carbon emission calculation
carbon mitigation prediction
