Online X-ray Fluorescence (XRF) Analysis of Heavy Metals in Pulverized Coal on a Conveyor Belt
Online X-ray Fluorescence (XRF) Analysis of Heavy Metals in Pulverized Coal on a Conveyor Belt
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传送带上煤粉中重金属的在线 X 射线荧光 (XRF) 分析
DOI：
10.1177/0003702815620129
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发表时间：
2016-01
影响因子：
3.5
通讯作者：
Chen Da
中科院分区：
文献类型：
--
作者：
Zhang Yan;Zhang XinLei;Jia WenBao;Shan Qing;Ling YongSheng;Hei DaQian;Chen Da
雾霾事件中的重金属将继续威胁全球公共卫生质量。为了减少燃煤过程中重金属的排放，研制了一套由X射线荧光分析仪和激光测距仪组成的在线X射线荧光分析系统，用于煤粉中重金属的测量。XRF分析仪安装在滑板上，可以有效地平滑煤粉表面，减少在线测量过程中表面粗糙度的影响。激光测距仪安装在滑橇上，用于测量煤粉样品与分析仪之间的距离。采用XRF分析仪直接在输送带上方对煤粉中的几种重金属和其它元素进行在线测量。Hg、Pb、Cr、Ti、Fe和Ca的检出限分别为44 ± 2、34 ± 2、17 ± 3、41 ± 4、19 ± 3和65 ± 2 mg·kg-1。所述元素的相对标准偏差（%RSD）小于7.74%。通过与电感耦合等离子体质谱（ICP-MS）的结果比较，在线XRF分析仪的相对偏差（%D）对于Cr、Ti和Ca小于10%，对于Fe在0.8-24.26%的范围内，对于Hg和Pb大于20%。
Heavy metals in haze episode will continue to threaten the quality of public health around the world. In order to decrease the emission of heavy metals produced from coal burning, an online X-ray fluorescence (XRF) analyzer system, consisting of an XRF analyzer with data acquisition software and a laser rangefinder, was developed to carry out the measurement of heavy metals in pulverized coal. The XRF analyzer was mounted on a sled, which can effectively smooth the surface of pulverized coal and reduce the impact of surface roughness during online measurement. The laser rangefinder was mounted over the sled for measuring the distance between a pulverized coal sample and the analyzer. Several heavy metals and other elements in pulverized coal were online measured by the XRF analyzer directly above a conveyor belt. The limits of detection for Hg, Pb, Cr, Ti, Fe, and Ca by the analyzer were 44 ± 2, 34 ± 2, 17 ± 3, 41 ± 4, 19 ± 3, and 65 ± 2 mg·kg–1, respectively. The relative standard deviation (%RSD) for the elements mentioned was less than 7.74%. By comparison with the results by inductively-coupled plasma mass spectrometry (ICP-MS), relative deviation (%D) of the online XRF analyzer was less than 10% for Cr, Ti, and Ca, in the range of 0.8–24.26% for Fe, and greater than 20% for Hg and Pb.
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影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
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通讯作者：
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