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首页> 外文会议>International Chemical Recovery Conference v.1; 20040606-20040610; Charleston,SC; US >Trace Element Distribution in and Around the Recovery Boiler
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Trace Element Distribution in and Around the Recovery Boiler

机译：回收锅炉内及其周围的微量元素分布

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摘要

The amounts and concentrations of six trace elements, arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), manganese (Mn), and nickel (Ni) were studied in and around the recovery boiler of a large kraft pulp mill. All together over 100 samples were collected from streams within the pulp mill. In this paper the results are presented for the whole mill and for the streams into and out from the recovery boiler, including the black liquor after the evaporators, the fired black liquor, the fly ash, the flue gases, the particulate matter in the flue gases, and the smelt. The samples were analyzed with various analytical methods including Inductively Coupled Plasma emission Mass Spectrometry (ICP-MS) with enhanced sensitivity. The mass balance could be satisfactorily closed for some of the trace elements studied, while for others the difference between ingoing and outgoing amounts were fairly big. The observed distribution of the elements between flue gas and smelt can to a great extent be explained by their different volatility. A predictive model for the trace element chemistry in the recovery boiler is developed and the first preliminary results are presented.
机译：在大型回收锅炉内外对砷，镉，铬，铬，铅，锰和镍六种微量元素的含量和浓度进行了研究。牛皮纸浆厂。从制浆厂的流中总共收集了100多个样品。本文介绍了整个工厂以及回收锅炉出入的物流的结果，包括蒸发器后的黑液，燃烧的黑液，粉煤灰，烟道气，烟道中的颗粒物。气体和熔炼。使用各种分析方法对样品进行分析，包括灵敏度更高的电感耦合等离子体发射质谱法（ICP-MS）。对于某些所研究的微量元素，可以令人满意地关闭质量平衡，而对于其他微量元素，进出量之间的差异相当大。观察到的烟气和冶炼物之间元素的分布在很大程度上可以用它们的挥发性来解释。建立了回收锅炉中微量元素化学组成的预测模型，并给出了初步的初步结果。

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