• 关键词：燃煤电站锅炉(CFP)  烟气脱硫  FGCAS  NH₃  SO₂

• 基金项目：清华大学重点项目经费(985校06基础06);中国博士后科学基金

• 何伯述
• 1. 清华大学煤的清洁燃烧技术国家重点实验室, 北京 100084; 2. 北方交通大学机电学院动力系, 北京 100044

• 郑显玉
• 清华大学煤的清洁燃烧技术国家重点实验室, 北京 100084

• 常东武
• 清华大学煤的清洁燃烧技术国家重点实验室, 北京 100084

• 陈昌和
• 清华大学煤的清洁燃烧技术国家重点实验室, 北京 100084

• 摘要：对使用氨(NH₃)脱除烟气中气态污染物的技术进行了分析和总结, 认为氨洗涤法洗涤净化烟气是一种很有前景的方法, 并就温度对SO₂脱除率的影响进行了实验研究.实验研究结果显示, 当温度超过54℃时, NH₃对SO₂仍有很高的脱除率.并根据实验结果建议, 在实际氨法脱硫工程中, 脱硫过程温度宜控制在60℃以下或在80℃以上.

• Abstract：The techniques for reducing SO₂ by ammonia gas scrubbing are reviewed and analyzed in this paper. The byproducts from the FGCAS (flue gas cleaning by ammonia scrubbing) process are useful for agriculturae or for gas recovery. Also, the authors present the experimental results for SO₂ reduction from the flue gas in the coal fired plant (CFP), and conclude that the methods by ammonia injection or scrubbing are effective to control the pollutant gas emissions. Stromberger conducted a bench scale study of the SO₂ removal by NH 3 gas injection in simulated flue gases. The results were similar to the equilibrium calculations of Tock et al, and indicated that SO₂ removal dropped to near zero at a temperature of around 54℃. On the other hand, a pilot scale study performed by Keener and Davis showed that a high SO₂ removal from flue gas by NH 3 injection was possible at temperature above 54℃. They reported that the SO₂ removal was in excess of 95% at about 2:1 molar injections of NH 3/SO₂ for temperatures below 85℃.Our experimental results presented herein indicate that the FGCAS is still effective to remove SO₂ above 54℃. The process temperature should be controlled below 60℃ or above 80℃ in actual installation for SO₂ reduction by NH 3 scrubbing based on the experiments.

• Key words：coal fired plant (CFP)  FGD  FGCAS  NH₃  SO₂

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