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首页> 外文期刊>Fuel >Measures to reduce chlorine in deposits: Application in a large-scale circulating fluidised bed boiler firing biomass
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Measures to reduce chlorine in deposits: Application in a large-scale circulating fluidised bed boiler firing biomass

机译：减少沉积物中氯含量的措施：在大型循环流化床锅炉中燃烧生物质的应用

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摘要

Combustion of biomass with a high content of alkali (mainly potassium, K) and chlorine (Cl) can result in operational problems including deposit formation and superheater corrosion. Among the measures applied to decrease such problems are co-combustion and the use of additives. The positive effects of these measures are to a large extent either sulphation of the alkali chlorides (KG) to less corrosive alkali sulphates or capture of alkali from KC1 during release of HC1. A test campaign was carried out in a large-scale circulating fluidised boiler fired with biomass where the measures applied were sulphation by ammonium sulphate and co-combustion with peat. Their performance was evaluated by means of several advanced measurement tools including: 1ACM (on-line measurements of gaseous KC1); a low-pressure impactor (size distribution and chemical composition of extracted fly ash particles) and deposit measure ments (chemical composition in collected deposits). The overall performance was better for ammonium sulphate, which significantly lowered KC1 in the flue gas. Meanwhile no chlorine was found in the depos its. Only a minor reduction of gaseous KC1 was obtained during co-combustion with peat although the chlorine content in the deposits was greatly reduced. These findings were supported by the results from the impactor measurements.
机译：具有高含量的碱（主要是钾，K）和氯（Cl）的生物质燃烧会导致操作问题，包括沉积物形成和过热器腐蚀。减少此类问题的措施包括共燃和使用添加剂。这些措施的积极效果在很大程度上是将碱金属氯化物（KG）硫酸化为腐蚀性较小的碱式硫酸盐，或者是在HCl释放期间从KC1中捕获碱。在使用生物质燃烧的大型循环流化床锅炉中进行了一项试验，采用的措施是硫酸铵硫酸化和与泥煤共同燃烧。通过几种先进的测量工具对它们的性能进行了评估，这些工具包括：1ACM（气态KC1的在线测量）；低压冲击器（提取的粉煤灰颗粒的大小分布和化学组成）和沉积物测量值（收集的沉积物中的化学成分）。硫酸铵的整体性能更好，可显着降低烟道气中的KCl。同时，在其存放处未发现氯。尽管沉积物中的氯含量大大降低，但在与泥炭共燃烧期间仅获得了少量的气态KCl还原。这些发现得到了冲击器测量结果的支持。

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  • 来源
    《Fuel》 |2011年第4期|p.1325-1334|共10页
  • 作者

    Hakan Kassman; Markus Brostroem; Magnus Berg; Lars-Erik Amand;

  • 作者单位

    Vattenfall Power Consultant AB, SE-611 29 Nykoping, Sweden,Department of Energy and Environment, Chalmers University of Technology, Goeteborg, Sweden;

    Energy Technology and Thermal Process Chemistry, Umea University, Umea, Sweden;

    Vattenfall Research and Development AB, SE-162 87 Stockholm, Sweden;

    Department of Energy and Environment, Chalmers University of Technology, Goeteborg, Sweden;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    combustion of biomass; chlorine in deposits; ammonium sulphate; in-situ alkali chloride monitor (iacm); peat;

    机译：生物质燃烧沉积物中的氯;硫酸铵原位碱式氯化物监测仪（iacm）;泥炭;

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