Flame propagation characteristics of mixed pulverized coal at the atmosphere of gasification

被引：22

作者：

Wang, Xiaotong ^{[1
,2
]}

Dai, Huaming ^{[1
]}

Liang, Guangqian ^{[1
]}

Zhu, Huiwei ^{[1
]}

Zhang, Bingqian ^{[1
]}

He, Song ^{[1
]}

Zhao, Qi ^{[1
]}

Yin, Hepeng ^{[1
]}

Chen, Xianfeng ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Safety Sci & Emergency Management, Luoshi Rd 122, Wuhan 430070, Peoples R China

[2] China Univ Min & Technol Beijing, Sch Emergency Management & Safety Engn, D 11,Xueyuan Rd, Beijing 100083, Peoples R China

来源：

FUEL | 2021年 / 300卷

基金：

中国国家自然科学基金;

关键词：

Pulverized coal; Flame propagation; Spraying time; Peak temperature; Coal gasification; DUST/AIR EXPLOSIONS; IGNITION; BEHAVIOR; SUPPRESSION; VELOCITY; MODEL;

D O I：

10.1016/j.fuel.2021.120954

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The leakage of pulverized coal easily results in fire and explosion accidents during coal gasification process. A vertical pipeline was built with the high-speed camera, micro-thermocouple and pressure sensor to obtain the characteristics of flame propagation. Based on the atmosphere of coal gasification, the effects of the spraying time, particle conditions, and rank of the pulverized coal were studied. The results show that the peak temperature, combustion pressure and velocity increase first and then decrease with the increasing of spraying time. When the particle size pulverized coal is 200 mesh, the peak pressure reaches the highest value. The flame propagation characteristics are similar at different concentrations of pulverized coal and the maximum appears at 333 g/m3. In addition, the peak temperature of the pulverized coal flame increases with the increasing of the proportion of long-flame coal in the mixed coal. The optimum characteristics of flame propagation appear at different ratios of mixed coal due to the effect of coal rank.

引用

页数：11

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