• 关键词：燃煤电厂  超低排放  排放特征  粒径分布  成分谱

• 基金项目：国家自然科学基金项目（No.41303074）

• 刘艳梅
• 北京市环境保护科学研究院, 北京 100037

• 闫静
• 北京市环境保护科学研究院, 北京 100037

• 徐文帅
• 海南省环境监测中心站, 海口 571000

• 燕潇
• 北京市环境保护科学研究院, 北京 100037

• 孙雪松
• 北京市环境保护科学研究院, 北京 100037

• 宋光武
• 北京市环境保护科学研究院, 北京 100037

• 张蕊
• 北京市环境保护科学研究院, 北京 100037

• 魏春旺
• 北京市顺义大龙城乡建设开发总公司, 北京 101300

• 武彤冉
• 北京市环境保护科学研究院, 北京 100037

• 罗志云
• 北京市环境保护科学研究院, 北京 100037

• 摘要：基于海口电厂"超低排放"燃煤机组在线监测数据和实测结果，研究颗粒物、SO₂、NO_x排放特征，分析颗粒物粒径分布和化学成分谱.结果显示，"超低排放"机组颗粒物、SO₂、NO_x排放浓度均值分别为（1.57±0.81）、（15.15±6.23）和（40.10±3.63）mg·m^-3，均满足超低排放限值要求.TSP、PM₁₀、PM_2.5、PM₁、SO₂、NO_x的排放因子均值分别为0.0099、0.0098、0.0092、0.0065、0.1131、0.2882 kg·t^-1，排放因子集中在很窄的区间内，呈正态或偏正态分布，与未进行超低改造研究结果比较，排放因子减小了1~2个数量级.颗粒物数浓度分布呈双峰分布，数浓度峰值粒径为0.027 μm和0.641 μm；质量浓度呈单峰分布，峰值粒径为1.100 μm.PM₁₀、PM_2.5、PM₁的成分谱差异很小，其主要化学组分为SO₄^2-、Ca、NH₄⁺、NO₃^-、OC，在PM₁₀中质量占比分别为29.41%±0.94%、12.09%±1.95%、9.49%±2.35%、6.96%±0.49%、4.93%±0.57%；在PM_2.5中质量占比分别为29.18%±1.58%、12.72%±1.77%、9.21%±2.01%、5.31%±0.13%、4.33%±0.72%；在PM₁中质量占比分别为29.04%±3.15%、17.99%±3.61%、8.42%±1.50%、4.445±0.08%、5.075±0.07%.

• Abstract：Based on the continuous on-line monitoring data and measured results of "ultra-low emission" unit in Haikou Coal-fired Power Plant, the emission characteristic of particulate matter, SO₂ and NO_x was studied, and the particle size distribution and source profile were analyzed. The results showed that the mean emission mass concentrations of particulate matter, SO₂ and NO_x of the ultra-low emission unit were (1.57±0.81), (15.15±6.23) and (40.10±3.63) mg·m^-3, respectively, which meet the requirements of ultra-low emission limits. The average emission factors of TSP, PM₁₀, PM_2.5, PM₁, SO₂, NO_x were 0.0099, 0.0098, 0.0092, 0.0065, 0.1131 and 0.2882 kg·t^-1, respectively. The emission factors were concentrated in a very narrow range, showing a normal or partial normal distribution. Compared with the results of no ultra-low modification, the emission factors reduced by 1~2 orders of magnitude; the particle size distribution of the number concentration showed double peak distribution, the peak particle size was 0.027 μm and 0.641 μm;the mass concentration showed Unimodal distribution, the peak particle size of the mass concentration was 1.100 μm. The difference of source profile in PM₁₀, PM_2.5 and PM₁ was very small. The main components of PM₁₀, PM_2.5 and PM₁ were SO₄^2-, Ca, NH₄⁺, NO₃^-, OC, accounting for 29.41%±0.94%, 12.09%±1.95%, 9.49%±2.35%, 6.96%±0.49%, 4.93%±0.57% of the total mass in PM₁₀, for 29.18%±1.58%, 12.72%±1.77%, 9.21%±2.01%, 5.31%±0.13%, 4.33%±0.72% in PM_2.5, 29.04%±3.15%, 17.99%±3.61%, 8.42%±1.50%, 4.44%±0.08%, 5.07%±0.07% in PM₁, respectively.

• Key words：coal-fired power plants  ultra-low emission  emission characteristics  size distribution  source profile

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