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

被引：32

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

来源：

CHEMICAL ENGINEERING SCIENCE | 2019年 / 207卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Entrained-flow gasifier; Coal water slurry (CWS); Atomization; Visualization; COAL-WATER SLURRY; AIR; JET; BREAKUP; PERFORMANCE;

D O I：

10.1016/j.ces.2019.06.055

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

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.

引用

页码：542 / 555

页数：14

共 37 条

[1] The Effects of Particle Size on the Mechanisms of Atomization of Suspensions Using Hydraulic Spray Nozzles [J].

Addo-Yobo, F. O. ;

Pitt, M. J. ;

Obiri, H. A. .

AICHE JOURNAL, 2011, 57 (08) :2007-2024

[2] Behaviour of an air-assisted jet submitted to a transverse high-frequency acoustic field [J].

Baillot, F. ;

Blaisot, J. -B. ;

Boisdron, G. ;

Dumouchel, C. .

JOURNAL OF FLUID MECHANICS, 2009, 640 :305-342

[3] Primary Fragmentation Characteristics of Coal Particles during Rapid Pyrolysis [J].

Cui, Tongmin ;

Zhou, Zhijie ;

Dai, Zhenghua ;

Li, Chao ;

Yu, Guangsuo ;

Wang, Fuchen .

ENERGY & FUELS, 2015, 29 (10) :6231-6241

[4] On the experimental investigation on primary atomization of liquid streams [J].

Dumouchel, Christophe .

EXPERIMENTS IN FLUIDS, 2008, 45 (03) :371-422

[5] Physics of liquid jets [J].

Eggers, Jens ;

Villermaux, Emmanuel .

REPORTS ON PROGRESS IN PHYSICS, 2008, 71 (03)

[6]

Farago Z., 1992, Atomization and Sprays, V2, P137

[7] Experimental study of diesel fuel atomization performance of air blast atomizer [J].

Gad, H. M. ;

Ibrahim, I. A. ;

Abdel-Baky, M. E. ;

Abd El-Samed, A. K. ;

Farag, T. M. .

EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2018, 99 :211-218

[8] Vision-based investigation on the ash/slag particle deposition characteristics in an impinging entrained-flow gasifier [J].

Gong, Yan ;

Zhang, Qing ;

Guo, Qinghua ;

Xue, Zhicun ;

Wang, Fuchen ;

Yu, Guangsuo .

APPLIED ENERGY, 2017, 206 :1184-1193

[9] Refractory failure in entrained-flow gasifier: Vision-based macrostructure investigation in a bench-scale OMB gasifier [J].

Gong, Yan ;

Zhang, Qing ;

Zhu, Huiwen ;

Guo, Qinghua ;

Yu, Guangsuo .

APPLIED ENERGY, 2017, 205 :1091-1099

[10] Experimental study on particle characteristics in an opposed multi-burner gasifier [J].

Gong, Yan ;

Yu, Guangsuo ;

Guo, Qinghua ;

Zhou, Zhijie ;

Wang, Fuchen ;

Liu, Yongdi .

CHEMICAL ENGINEERING SCIENCE, 2014, 117 :93-106

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