生态环境学报2024，Vol.33Issue(6)：919-926,8.DOI:10.16258/j.cnki.1674-5906.2024.06.009
济南市不同类型燃煤供暖企业废气组分特征及排放估算
Component Characteristics and Emission Estimation of Exhaust Gas from Different Types of Coal-fired Heating Enterprises in Ji'nan,China
摘要
Abstract
Fine particulate matter(PM2.5)in the waste gas emitted from three types of coal-fired heating plants(thermal power,heat source,and power plants)was sampled using the dilution channel sampling method.The main components of PM2.5,as well as the emission characteristics of SO2,NOx,PM2.5,NH3,and the chemical component characteristics of PM2.5,were analyzed based on online monitoring data.The results showed that the average emission concentrations of SO2,NOx,PM2.5 and NH3 from the three types of coal-fired heating enterprises ranged from 1.01‒15.0,18.6‒39.8,0.592‒2.37,0.125‒2.00 mg·m-3,respectively,with a great difference in emission concentrations.Among them,the heat source plant using coal with low sulfur content had a significantly lower SO2 emission concentration than the thermal power and power plants.In thermal power plants and power plants,the emission concentrations of SO2,NOx and PM2.5 met the requirements of the national ultra-low emission limit,and the heat source plant met the emission standard limit requirements of local coal-fired boilers in Shandong Province.In terms of the component characteristics of PM2.5,the main components of the different types of heating plants differed significantly,with SO42-(11.8%)and OC(17.1%)for thermal power plants,Ca2+(11.6%)and OC(33.5%)for heat source plants,and SO42-(23.0%)and OC(18.6%)for power plants,all of which had much higher OC proportions than those of other regions in China.This may be related to the operating conditions of the coal quality and the environmental protection facilities of local enterprises.The high proportions of SO42-in thermal and power plants are related to the high sulfur content of the fuel.During the heating season from 2022 to 2023,the total amount of water-soluble ions in PM2.5,the component of flue gas emitted by the three types of heating enterprises in Ji'nan City,was the largest,and the total annual emission was 3.74×104 kg,which is 2.07 times that of the carbon component and 5.18 times that of the inorganic elements.The total amount of water-soluble ions emitted by power plants was the highest.The annual emission was 3.01×104 kg,accounting for 80.5%.The water-soluble ion emission of the heat source plant is 4.14 times that of the thermal power plant,and the inorganic element emission of the heat source plant was the highest,with an annual emission of 4.96×103 kg.Water-soluble ions(0.605 kg∙m-3 flue gas),carbon components(0.715 kg∙m-3 flue gas),and inorganic elements(0.161 kg∙m-3 flue gas)in the heat source plant exhibited high emission characteristics.The control of carbon components and water-soluble ions in PM2.5 from the heat source plant in winter and giving attention to the stable operation of denitration facilities are recommended.This study can provide data support for the decision-making of air PM2.5 pollution control in Ji'nan,Shandong,China.关键词
燃煤供暖企业/废气污染物/PM2.5成分谱/组分特征/排放估算Key words
coal-fired heating enterprise/exhaust pollutant/PM2.5 composition spectrum/component characteristics/emission estimation分类
资源环境引用本文复制引用
潘光,苗亚茹,谷树茂,唐厚全,毛书帅,张桂芹,闫学军..济南市不同类型燃煤供暖企业废气组分特征及排放估算[J].生态环境学报,2024,33(6):919-926,8.基金项目
2020-2023年度山东省重点研发计划(2020CXGC011401) （2020CXGC011401）
2022年研究生教育优质课程建设项目(YZKC202214) （YZKC202214）
山东省科技型中小企业创新能力提升工程项目(2023TSGC0911) （2023TSGC0911）
