Ash Aerosol and Deposition Formation Mechanisms during Air/Oxy-combustion of Rice Husks in a 100 kW Combustor
Ash Aerosol and Deposition Formation Mechanisms during Air/Oxy-combustion of Rice Husks in a 100 kW Combustor
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DOI：
10.1021/acs.energyfuels.7b03127
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发表时间：
2018-01
期刊：
影响因子：
5.3
通讯作者：
Yueming Wang;Xiaolong Li;J. Wendt
中科院分区：
文献类型：
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作者：
Yueming Wang;Xiaolong Li;J. Wendt
在100 kW（额定）下燃式富氧燃烧器（OFC）中，在两种条件下将粉碎的稻壳与天然气共燃：1）空气燃烧（表示为空气）; 2）在入口氧化剂气体中具有70%O2和30%CO2的富氧燃烧（表示为OXY 70）。本文所研究的是：1）飞灰气溶胶中无机物分配的控制机制，以及2）这些如何影响传热表面上的沉积机制。在每种情况下，使用电迁移率/光散射仪器（SMPS/APS）和Berner低压冲击器（BLPI）确定灰气溶胶粒度分布（PSD），后者收集尺寸分离的气溶胶用于后续分析。用专门设计的探针对灰沉积速率进行了实验测量，并探讨了灰沉积速率与气溶胶的关系。还使用激光衍射粒度分析仪（用于PSD）和SEM/EDS和XRD（用于成分）研究了沉积物的性质。数据显示，comp.
Pulverized rice husks are co-fired with natural gas in a 100 kW (rated) down-fired oxy-fuel combustor (OFC) under two conditions: 1) air combustion (denoted as Air); 2) oxy-combustion with 70% O2 and 30% CO2 in the inlet oxidant gas (denoted as OXY70). Studied in this paper are: 1) mechanisms governing the partitioning of inorganic matter within the fly ash aerosol, and 2) how these affect mechanisms of deposition on heat transfer surfaces. In each case, the ash aerosol particle size distributions (PSDs) were determined using electric mobility/light scattering instruments (SMPS/APS) and a Berner Low Pressure Impactors (BLPI), where the latter collected size segregated aerosol for subsequent analysis. The ash deposition rate was measured experimentally using a specially designed probe, and its relationship with aerosols was explored. The properties of the deposits were also investigated using a laser diffraction particle size analyzer for PSDs, and SEM/EDS and XRD for compositions. The data show that, comp...