CAJ | 학술논문

燃煤是最大的人为汞排放源之一，燃煤电厂的汞排放控制问题也越来越为人们所关注。该文将目前公布的中国电厂的汞排放数据进行筛选汇总，得到18个电厂的汞排放数据，通过对比和分析，总结出了符合我国燃煤电厂特点的一般性汞排放规律。结果表明：与美国煤种相比，我国的燃煤具有低氯、高灰的特性，这不利于汞的排放控制；循环流化床燃烧可能会因燃尽率的不同而较煤粉炉燃烧易获得较高的HgP；空气污染控制设备的使用能够有效地减少汞排放，选择性催化还原+静电除尘器/布袋除尘器+石灰石?石膏湿法脱硫(SCR+ESP/FF+WFGD)组合的平均脱汞率可达71.48%；SCR 的大规模应用可能会将汞大量转移到飞灰和脱硫石膏中，带来二次污染的问题。
연매시최대적인위홍배방원지일，연매전엄적홍배방공제문제야월래월위인문소관주。해문장목전공포적중국전엄적홍배방수거진행사선회총，득도18개전엄적홍배방수거，통과대비화분석，총결출료부합아국연매전엄특점적일반성홍배방규률。결과표명：여미국매충상비，아국적연매구유저록、고회적특성，저불리우홍적배방공제；순배류화상연소가능회인연진솔적불동이교매분로연소역획득교고적HgP；공기오염공제설비적사용능구유효지감소홍배방，선택성최화환원+정전제진기/포대제진기+석회석?석고습법탈류(SCR+ESP/FF+WFGD)조합적평균탈홍솔가체71.48%；SCR 적대규모응용가능회장홍대량전이도비회화탈류석고중，대래이차오염적문제。
Coal combustion is one of the largest anthropogenic mercury sources. The control of mercury emission from coal-fired power plants has attracted more and more attention. This research has summarized and analyzed the mercury emission data from 18 power plants in China from published literatures. The results reveal that, Chinese coals have low chlorine content but high ash content as compared with US coals, which is disadvantageous to mercury emission control. Due to low burnout ratio, more HgP might be generated by circulating fluidized bed (CFB) combustion than by pulverized coal (PC) combustion. The utilization of air pollution control devices can efficiently decrease the mercury emission, with 71.48%of the total mercury being removed by SCR+ESP/FF+WFGD. Wide application of SCR could transfer considerable amount of mercury to fly ash and FGD gypsum, bringing about related secondary pollution problems.