摘要
采用自设固定源PM_(2.5)稀释采集系统对陕西省关中地区多个燃煤电厂烟气中的颗粒物开展了现场实测与样品化学源组分分析。结果表明:4个燃煤电厂PM_(2.5)、PM_(10)占颗粒物比重差异较大(PM_(2.5)占比范围为6.92%～54.34%,PM_(10)占比范围为36.36%～73.02%);4个燃煤电厂数浓度水平最高值(2.0×104～4.0×105个/cm^3)差异较大,相差约1个数量级;燃煤电厂PM_(2.5)小粒径段颗粒物质量浓度占比大多较低,但其对PM_(2.5)数浓度贡献却很大(最小值>95%),大粒径段颗粒物则相反;煤粉炉PM_1/PM_(2.5)较大,占比范围为35.29%～51.35%,循环流化床锅炉PM_1/PM_(2.5)较小,占比范围为16.62%～21.47%;SO_4^(2-)是燃煤电厂PM_(2.5)中最丰富的离子成分,各电厂SO_4^(2-)占总离子浓度比重范围为50.02～65.52%,Na^+和Ca^(2+)位于第2或第3位;各燃煤电厂主要检出无机元素是Si、Al、Ca、Na、Fe、Na等地壳元素;燃煤电厂PM_(2.5)、PM_(10)和颗粒物的排放因子范围分别为0.001～0.028kg/t、0.002～0.086kg/t、0.003～0.236kg/t;除尘设施组合越复杂先进,排放因子就可能越小。
Field experiments and chemical composition analysis of particle in flue gas from several coal-fired power plants in Guanzhong area of Shaanxi province was carried out with dilution and collection system of PM2.5 in stationary sources designed by the team.The results show that the proportions of PM2.5 and PM10 in the particles of 4 coal-fired power plants are quite different.The proportion of PM2.5 ranges from 6.92%to 54.34%,and the proportion of PM10 ranges from 36.36% to 73.02%.Maximum values(2.0×104 to4.0×105/cm3)of number concentration levels from 4 coal-fired power plants are quite different,and thedifference is about 1 order of magnitude.The mass concentration proportion of small particles to PM2.5 from coal-fired power plants is mostly low,but the small particles’ contribution to PM2.5 number concentration is great(minimum value>95%),and the situation of the large particles is quite the opposite.The PM1/PM2.5 value of the pulverized coal boiler is large,the ratio range is between 35.29% and 51.35%,and the PM1/PM2.5 value of the circulating fluidized bed boiler is small,the ratio range is between 16.62% and21.47%.SO42- is the most abundant ion component in PM2.5 of coal-fired power plants,and the proportion of SO42- to total ion concentration ranges from 50.02% to 65.52%,Na+and Ca2+ranking second or third.The main inorganic elements detected in the coal-fired power plants are Si,Al,Ca,Na,Fe,Na and other crustal elements.The emission factors’ range of PM2.5,PM10 and particles in the coal-fired power plants are 0.001 to0.028 kg/t,0.002 to 0.086 kg/t and 0.003 to 0.236 kg/t,respectively.The more complex and advanced the combination of dust removal facilities is,the smaller the emission factor is likely to be.
作者
杨建军
杜利劳
马启翔
林启才
卢立栋
刘赵梅
徐楠
申圆圆
YANG Jianjun;DU Lilao;MA Qixiang;LIN Qicai;LU Lidong;LIU Zhaomei;XU Nan;SHEN Yuanyuan(School of Biological and Environmental Engineering,Xi'an University of Arts and Science,Xi'an 710065,P.R.China;Shaanxi Research Academy of Environmental Science,Xi'an 710061,P.R.China)
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第12期55-65,共11页
Journal of Chongqing University
基金
陕西省科技统筹创新工程计划课题(2012KTZB03-01)~~
关键词
燃煤电厂
PM2.5
粒径分布
水溶性离子
无机元素
排放因子
coal-fired power plant
PM2.5
particle size distribution
water-soluble ion
inorganic element emission factor
