引用本文:王树民,张翼,刘吉臻.燃煤电厂细颗粒物控制技术集成应用及“近零排放”特性[J].环境科学研究,2016,29(9):1256-1263.
WANG Shumin,ZHANG Yi,LIU Jizhen.Integrated Application of Fine Particulate Matter Control Technologies and Their “Near-Zero Emission” Characteristics in Coal-Fired Power Plants[J].Reserrch of Environmental Science,2016,29(9):1256-1263.]
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燃煤电厂细颗粒物控制技术集成应用及“近零排放”特性
王树民1, 张 翼2, 刘吉臻1
1.华北电力大学能源动力与机械工程学院, 北京 102206 ;2.三河发电有限责任公司, 河北 廊坊 065200
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(SO2)和 ρ(NOx)分别低于GB 13223—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/m3).其中,1~3号机组排放ρ(烟尘)分别为5、3、2 mg/m3,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SO3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/m3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、PM10和SO3的脱除效率分别为98.37%、97.31%和42.23%.
关键词:  燃煤发电  “近零排放”  细颗粒物控制  PM2.5、PM10及SO3脱除  湿式静电除尘
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基金项目:国家科技支撑计划项目(2015BAA05B02)
Integrated Application of Fine Particulate Matter Control Technologies and Their “Near-Zero Emission” Characteristics in Coal-Fired Power Plants
WANG Shumin1, ZHANG Yi2, LIU Jizhen1
1.School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China ;2.Sanhe Power Generation Co. Ltd., Langfang 065200, China
Abstract:
Abstract: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 ρ(NOx) were 5,5 and 50 mg/m3 respectively. Particle matter concentrations in units 1-3 were 5,3 and 2 mg/m3. The dust concentration in unit 4 was below 1 mg/m3 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/m3 at the outlet of FGD during the test period. WESP was installed in units 1,2 and 4; the dust removal efficiency reached 77.87%, 88.82% and 83.60% respectively. The performance of WESP on PM2.5, PM10 and SO3 removal in unit 2 achieved to 98.37%, 97.31% and 42.23% reduction.
Key words:  coal-fired power generation  “near-zero emission”  fine particular matter control  PM2.5, PM10 and SO3 removal  wet electrostatic precipitation