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煤粉定量喂料系统下煤波动的原因及改造方案
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作者 夏静慧 丁凯 《科学技术创新》 2018年第21期185-186,共2页
针对煤粉定量喂料系统存在负荷率不稳定、煤粉下料断续、计量不精确,喂煤流量波动大,煤粉输送到燃烧器时有脉冲现象等问题,分析原因,对应改造,解决了上述问题,在生产和环保等方面带来巨大效益。
关键词 粉定量喂料系统 下煤波动 助流时间 输送管道 称重装置
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Effects of atmospheric pressure fluctuations on hill-side coal fires and surface anomalies 被引量:5
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作者 Song Zeyang Zhu Hongqing +1 位作者 Xu Jiyuan Qin Xiaofeng 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2015年第6期1037-1044,共8页
This paper presents numerical studies on the effects of atmospheric pressure fluctuations on hill-side coal fires and their surface anomalies. Based on the single-particle reaction–diffusion model, a formula to estim... This paper presents numerical studies on the effects of atmospheric pressure fluctuations on hill-side coal fires and their surface anomalies. Based on the single-particle reaction–diffusion model, a formula to estimate oxygen consumption rate at high temperature controlled by oxygen transport is proposed.Daily fluctuant atmospheric pressure was imposed on boundaries, including the abandoned gallery and cracks. Simulated results show that the effects of atmospheric pressure fluctuations on coal fires and surface anomalies depend on two factors: the fluctuant amplitude and the pressure difference between inlet(s) and outlet(s) of the air ventilation system. If the pressure difference is close to the fluctuant amplitude, atmospheric pressure fluctuations greatly enhance gas flow motion and temperatures of the combustion zone and outtake(s). If the pressure difference is much larger than the fluctuant amplitude, atmospheric pressure fluctuations exert no impact on underground coal fires and surface anomalies. 展开更多
关键词 Coal firesOxygen consumpdon rateAir leakageVentilation
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