Morphological and Mineralogical Characterization of Ash Deposits during Circulating Fluidized Bed Combustion of Zhundong Lignite
Morphological and Mineralogical Characterization of Ash Deposits during Circulating Fluidized Bed Combustion of Zhundong Lignite
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准东褐煤循环流化床燃烧过程中灰沉积物的形态和矿物学特征
DOI：
10.1021/acs.energyfuels.8b04512
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发表时间：
2019-02
期刊：
影响因子：
5.3
通讯作者：
Zhang Dongke
中科院分区：
文献类型：
--
作者：
Liu Zhuo;Li Jianbo;Zhu Mingming;Wang Quanhai;Lu Xiaofeng;Zhang Yuanyuan;Zhang Zhezi;Zhang Dongke
研究了准东褐煤循环流化床（CFB）燃烧过程中灰沉积物的矿物学和形貌特征。在0.2t/h的循环流化床燃烧器中，在950 °C下燃烧粒度小于3 mm的准东褐煤，在燃烧室、旋风分离器出口和尾部烟道安装4个风冷探针，模拟灰在传热表面上的沉积。这些探头上的灰沉积物提取后6小时的实验和分析，使用扫描电子显微镜能量色散X射线光谱，X射线衍射，电感耦合等离子体发射光谱，和激光颗粒分析仪的形态，矿物学和化学表征。结果表明，在循环流化床燃烧室内，探头上的灰存款是一薄层富含Na的冷凝物和Ca/Mg烟雾，其矿物形式为NaAlSi 2 O 6、Na 2SiO 3、Na 2SO 4和CaSO 4，它们被认为是引发灰沉积的原因。
The mineralogical and morphological characteristics of ash deposits collected from a circulating fluidized bed (CFB) burning Zhundong lignite were investigated. Zhundong lignite with particle sizes less than 3 mm was combusted in a 0.2 t/h CFB combustor at 950 °C with four air-cooled probes installed at the combustion chamber, cyclone outlet, and tail flue to simulate ash deposition on heat transfer surfaces. Ash deposits on these probes were extracted after 6 h of experimentation and analyzed using scanning electron microscopy energy-dispersive X-ray spectroscopy, X-ray diffraction, inductively coupled plasma optical emission spectroscopy, and a laser particle analyzer for their morphological, mineralogical, and chemical characterization. Results show that the ash deposit on the probe within the CFB chamber was a thin layer enriched in Na-bearing condensates and Ca/Mg fumes in the mineral forms of NaAlSi2O6, Na2SiO3, Na2SO4, and CaSO4, which were believed to be responsible for initiating the ash depositi...
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影响因子：
5.3
作者：
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影响因子：
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DOI：
10.2172/760515
发表时间：
2000-08
期刊：
--
影响因子：
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作者：
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通讯作者：
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影响因子：
7.4
作者：
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