Effect of Nozzle Quantity on the Flow Field Characteristics and Grinding Efficiency in a Steam Jet Mill

被引:1
作者
Huang, Shenglong [1 ]
Zhang, Yulu [1 ]
Yin, Xixi [1 ]
Zhang, Mingxing [1 ,2 ]
Li, Hong [1 ,2 ]
Wang, Zhe [1 ,2 ]
Chen, Haiyan [1 ,2 ]
Wang, Huan [1 ,3 ]
机构
[1] Southwest Univ Sci & Technol, Sch Environm & Resource, Mianyang 621010, Peoples R China
[2] Southwest Univ Sci & Technol, Key Lab Solid Waste Treatment & Resource Recycle, Minist Educ, Mianyang 621010, Peoples R China
[3] Sichuan Univ Sci & Engn, Sch Mech Engn, Yibin 644000, Peoples R China
关键词
steam jet mill; nozzle quantity; numerical simulation; fly ash; grinding efficiency; PERFORMANCE; PULVERIZATION; PARTICLES;
D O I
10.3390/pr12071500
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A steam jet mill (SJM), which employs industrial waste heat steam as a gas source, is a widely utilized apparatus for the pulverization of fly ash. To achieve elevated single-machine grinding capacity, efficiency improvement research based on structural optimization should be conducted. In this study, numerical simulations and industrial experiments are carried out on SJMs equipped with three and six nozzles (hereinafter referred to as N3 and N6, respectively) to study the influence of nozzle quantity on the flow field and grinding efficiency. The numerical simulation results indicate that, under the N3 structure, particles can achieve a higher impact velocity in the comminution area and improve the kinetic energy of a single impact. In the conveying area, the airflow diffusion is better, resulting in an upward flow field that is more uniform. The classification area shows an increase in the uniformity of the flow field and a significant reduction in the local vortex structure, which is beneficial for accurate particle classification. In the interim, industrial experiments demonstrate that the N3 structure can markedly enhance the processing capacity and energy efficiency of the system. The smaller the feed particle size, the more pronounced the efficiency improvement.
引用
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页数:17
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