中国动力煤污染物名义供电排放因子分布规律

Distribution Law of Nominal Atmosphere Pollutant Power Supply Emission Factor for China Power Coals

提出动力煤供电名义排放因子EF_x的概念:1.0kW·h供电量对应的某种大气污染物的排放量[mg/(kW·h)]。计算并分析267种中国动力煤的SO_2、NO_x、Hg及其氧化物、粉尘的EF_x。结果表明:(1)煤粉炉SO_2、NO_x的EF=320~390 mg/(kW·h),其中W火焰锅炉NO_x的EF=600~800 mg/(kW·h);Hg及其氧化物的EF=90~120μg/(kW·h),粉尘EF=90~120 mg/(kW·h);(2)循环流化床锅炉SO_2的EF=320~480 mg/(kW·h),NO_x的EF=650~950 mg/(kW·h);Hg及其氧化物的EF=100~140μg/(kW·h),粉尘EF=100~140 mg/(kW·h);(3)燃煤电站机组容量越大,供电煤耗越低,SO_2、NO_x、Hg及其氧化物、粉尘的EF_x的越小;(4)提出折算烟气量概念:Vy,zs=4187Vy/Qnet,ar Nm3/kg。Qnet,ar值越高,折算烟气量Vy,zs越小,SO_2、NO_x、Hg及其氧化物、粉尘的EF_x的越小;(5)以2014年全国和各省区市平均煤质参数和燃煤发电量数据为依据,计算名义供电排放因子。结果表明:各省区市平均供电煤耗区别于全国平均供电煤耗引起EF_x提高0.101%,各省区市平均煤质参数区别于全国平均煤质参数引起EF_x降低0.792%。

Propose a new concept： Nominal Power Supply Emission Factor, EFx[mg/（kW·h）], one type air pollutant emission corresponding to 1.0 kWh power supply. Calculate and analysis EFx for 267 type Chinese power coals, where x indicate SO2, NOx, Hg and its oxide and fly ash particles. The results mean that： （1） For pulverized coal fired Boiler （PCB）, EFso2=EFNOx=320-390 mg/（kW·h）; but for the W-flame PCB, EFNOx=600-800mg/（kW·h）; EFng=90 -120ttg/（kW·h）; EFFA=90-120 mg/（kW.h） ; （2） For Circulating Fluidized Bed （CFB） Boiler, EFSO2=320 -480 mg/（kW·h）, EFNOx=650-950 mg/（kW·h）; EFHg=100 140mg/（kW·h）, EFrA=100~140 mg/（kW·h）; （3） Larger the coal-fired power unit capacity, smaller the power supply coat consumption, lower the EFx mg,/（kW·h）; （4） Propose a new concept： conversion flue gas volume, Vy,zs= 4187Vy/Qnet,ar. Higher the Qnet,ar value, lower the Vy,zs value, and lower the EFx value; （5） On the basis of China and province power supply coal consumption and average coal parameters data, calculate and analysis the EFx. the results means that the difference of the power supply coal consumption between the China average value and province value lead to 0.101% EFx increase, the difference of coal parameters between China and province results in 0.792% EFx reduction.