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首页> 外文期刊>Energy & fuels >Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part III. Testing at a Higher Scale and Assessment of Selected Potential Operational Issues
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Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part III. Testing at a Higher Scale and Assessment of Selected Potential Operational Issues

机译：石灰厂水污泥在燃煤电厂烟气脱硫中的应用：第三部分。

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The feasibility of lime sludge utilization for flue gas desulfurization was evaluated by continuing the previous laboratory-scale studies at a higher scale and investigating two potential operational issues, namely, viscosity and metal corrosion. Two lime sludge samples and a baseline limestone sample, which were previously characterized and tested for SO2 capture from a simulated flue gas at a laboratory scale, were first tested at a tenfold scale with a simulated flue gas and then tested with a slipstream of flue gas from a coal-fired power plant. The tested lime sludge and limestone slurries reduced the SO2 concentration of the simulated flue gas from 2000 to <1 ppm and they demonstrated similar Hg re-emission profiles. Field-testing results revealed that the limestone and lime sludge slurries reduced the SO2 concentration of the flue gas from similar to 1500 to <1 ppm. These experiments confirmed our previous smaller scale laboratory results that lime sludge can function as a suitable substitute for limestone for SO2 removal from the flue gas of coal-fired power plants without negatively affecting Hg re-emission. Two operational issues, namely, viscosity and metal corrosion, were investigated to evaluate practical issues in the transition from limestone to lime sludge at power plants. Results of Marsh funnel viscosity experiments conducted at different solid contents and temperatures indicated that the limestone and lime sludge slurries and their gypsum counterparts had similar flow characteristics. Carbon-steel, stainless-steel, and Hastelloy coupons were tested for corrosion by lime sludge and limestone slurries. Both stainless steel and Hastelloy were resistive to corrosion in slurries made from lime sludge or limestone samples or their gypsum counterparts. A considerable but similar amount of corrosion was observed for carbon-steel coupons exposed to lime sludge and limestone slurries. Adding 5000 ppm of Cl- to slurries considerably increased the corrosion rate of carbon steel.
机译：通过继续进行更大规模的先前实验室规模研究并研究两个潜在的操作问题，即粘度和金属腐蚀，评估了石灰渣用于烟道气脱硫的可行性。先前已对特征的两个石灰污泥样品和一个基准石灰石样品进行了表征，并在实验室规模下对模拟烟道气中的SO2捕集进行了测试，首先使用模拟烟道气以十倍的规模对其进行了测试，然后对烟道气进行了气流测试。来自燃煤发电厂。经测试的石灰污泥和石灰石浆料将模拟烟道气中的SO2浓度从2000降低至<1 ppm，并且它们显示出相似的Hg再排放曲线。现场测试结果表明，石灰石和石灰泥浆将烟道气中的SO2浓度从大约1500降低到<1 ppm。这些实验证实了我们以前较小规模的实验室结果，即石灰渣可以作为石灰石的合适替代品，用于从燃煤电厂的烟气中去除SO2，而不会对汞的再排放产生负面影响。研究了两个操作性问题，即粘度和金属腐蚀，以评估电厂从石灰石向石灰渣转化的实际问题。在不同的固含量和温度下进行的沼泽漏斗粘度实验结果表明，石灰石和石灰淤泥浆液及其石膏对应物具有相似的流动特性。碳钢，不锈钢和哈氏合金试样经过石灰污泥和石灰石泥浆的腐蚀测试。在石灰渣或石灰石样品或其石膏对应物制成的浆料中，不锈钢和哈氏合金均具有耐腐蚀性能。对于暴露于石灰泥和石灰石泥浆中的碳钢试样，观察到相当大但相似的腐蚀量。向浆料中添加5000 ppm Cl-会大大提高碳钢的腐蚀速率。

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  • 来源
    《Energy & fuels》 |2019年第11期|11536-11543|共8页
  • 作者

    Dastgheib Seyed A.; Mock Justin; Salih Hafiz H.; Patterson Craig;

  • 作者单位

    Univ Illinois Prairie Res Inst Illinois State Geol Survey Champaign IL 61820 USA;

    US EPA Natl Risk Management Res Lab Cincinnati OH 45268 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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