文献类型：期刊文献

英文题名：Experimental study on the atomization and particle evolution characteristics in an impinging entrained-flow gasifier

作者：Wu, Xiaoxiang[1];Gong, Yan[1];Guo, Qinghua[1];Xue, Zhicun[1];Yu, Guangsuo[1,2]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[2]Ningxia Univ, Coll Chem & Chem Engn, State Key Lab High Efficiency Coal Utilizat & Gre, Yinchuan 750021, Peoples R China

年份：2019

卷号：207

起止页码：542

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20192707146511);WOS:【SCI-EXPANDED(收录号:WOS:000481644300045)】；

基金：The research was supported by the National Key R&D Program of China (2017YFB0602601) and National Natural Science Foundation of China (21761132034).

语种：英文

外文关键词：Entrained-flow gasifier; Coal water slurry (CWS); Atomization; Visualization

摘要：Based on the bench-scale opposed multi-burner (OMB) impinging entrained-flow gasifier and advanced visualization apparatus, studies on the coal water slurry (CWS) atomization process in gasifier were carried out. Morphological classification of the CWS atomization was discussed in detail. The particle size distribution of CWS after atomization was obtained by image processing algorithm and statistical method. The primary atomization modes in gasifier can be divided into: Rayleigh-type breakup and superpulsating breakup. Besides, the spray angle and breakup length are negatively correlated with the oxygen-CWS relative velocity. The secondary atomization modes can be divided into: no breakup, tensile breakup, shear breakup and synergistic breakup. The statistical analysis shows that the particle size of the CWS after atomization show a negative correlation with the oxygen-CWS relative velocity. The greater the difference in relative velocity between oxygen and CWS, the better the atomization effect, but excessive oxygen velocity results in reduced gasification efficiency. (C) 2019 Elsevier Ltd. All rights reserved.