摘要
细颗粒物是燃煤电厂污染物控制的难点.三河电厂通过技术集成进行"近零排放"技术攻关,包括采用低低温静电除尘器以提高细颗粒物的除尘效率、利用脱硫除尘一体化技术提高脱硫系统的协同除尘性能、通过湿式静电除尘器实现细颗粒物的深度控制.结果表明:三河电厂通过技术攻关和集成应用后,4台燃煤机组先后实现ρ(烟尘)、ρ(SO_2)和ρ(NO_x)分别低于GB13223—2011《火电厂大气污染物排放标准》中天然气燃气轮机组各自排放限值(5、35和50 mg/m^3).其中,1~3号机组排放ρ(烟尘)分别为5、3、2 mg/m^3,截至2016年3月15日,4号机组ρ(烟尘)连续265 d在1 mg/m3以下.采用低低温静电除尘技术后,4号机组除尘效率由99.86%升至99.89%,同时可凝结颗粒物前驱物SO_3的脱除效率从25.88%升至46.12%;3号机组采用脱硫除尘一体化技术后,100%负荷下协同除尘效率从34.29%升至87.66%以上,全负荷运行下吸收塔出口ρ(烟尘)稳定在3 mg/m^3左右;1号、2号、4号机组在100%负荷下湿式静电除尘器除尘效率分别为77.87%、88.82%、83.60%,2号湿式静电除尘器对PM_(2.5)、PM_(10)和SO_3的脱除效率分别为98.37%、97.31%和42.23%.
It is difficult to control all coal-fired pollutants, especially fine particle matter. The ＂near-zero emission＂ technology has been put into engineering practice in Sanhe Power Plant. To improve the capture efficiency of the fine particle matter, a low-temperature electrostatic precipitator （ESP） was adopted; integrated desulfurization and dedusting system was utilized to further reduce dust concentration; finally, a wet electrostatic precipitator （WESP） was installed to deeply decrease the fine particulate matter. Monitoring results showed that the pollutant matter in all four coal-fired units successively achieved concentrations much lower than that of the regulated levels of natural gas-fired units ; ρ（ particle matter） , ρ （ SO2 ） and p （ NOx ） were 5, 35 and 50 mg/m^3 respectively. Particle matter concentrations in units 1-3 were 5, 3 and 2 mg/m^3. The dust concentration in unit 4 was below 1 mg/m^3 for 265 d up to March 15th , 2016. Based on the innovative practices on the ＂near-zero emission＂ technology in unit 4 at Sanhe Power Plant, the performance of low-temperature ESP showed that the dust removal efficiency increased from 99. 86% to 99. 89% , and the removal of SO3 particle precursors increased from 25.88% to 46. 12%. After the application of the integrated desulfurization and dedusting systems, the dust removal efficiency was increased from 34.29% to 87.66% under 100% full-load operating condition. The dust concentration was about 3 mg/m^3 at the outlet of FGD during the test period. WESP was installed in units 1, 2 and 4; the dust removal efficiency reached77.87% , 88.82% and 83.60% respectively. The performance of WESP on PM2.5 , PM10 and SO3 removal in unit 2 achieved to 98.37% , 97.31% and 42.23% reduction.
作者
王树民
张翼
刘吉臻
WANG Shumin ZHANG Yi LIU Jizhen(School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China Sanhe Power Generation Co. Ltd. , Langfang 065200, China)
出处
《环境科学研究》
EI
CAS
CSSCI
CSCD
北大核心
2016年第9期1256-1263,共8页
Research of Environmental Sciences
基金
国家科技支撑计划项目(2015BAA05B02)
关键词
燃煤发电
“近零排放”
细颗粒物控制
PM2.5
PM
10及SO3脱除
湿式静电除尘
coal-fired power generation
＂ near-zero emission＂
fine particular matter control
PM2.5, PMl0 and SO3 removal
wet electrostatic precipitation
作者简介
王树民（1962-），男，山东梁山人，教授级高级工程师，博士，主要从事电力生产技术管理和燃煤电站污染物控制技术及应用研究，16010005@shenhua．cc．
