制粉系统管道流场三维模拟在1000 MW机组中的应用
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摘要
采用流体计算软件对某百万机组煤粉管道流场进行三维模拟,优化管道布置方式,提出斜管布置方案,减少弯头数目,用锐角弯头代替直角弯头。既可降低煤粉管道阻力,平衡磨煤机出口粉管之间的阻力;又可降低一次风机的出力,提高煤粉均匀性,改善锅炉着火和燃尽。煤粉管道改造表明,锅炉经济性和安全性有一定提升。
In the paper,the flow field of pulverized coal pipeline in a million units is simulated by fluid computing software,the layout method of pipeline is optimized,and the layout scheme of oblique pipe is put forward. The number of corners is reduced,acute corners are instead of right-angled corners. It can not only reduce the resistance of coal pipe,but also balance the resistance of coal mill outlet pipe. It can also reduce the output of a fan,improve the uniformity of coal powder,and improve the boiler fire and burn. The improvement of coal pipeline shows that the boiler economy and safety have been improved.
In the paper,the flow field of pulverized coal pipeline in a million units is simulated by fluid computing software,the layout method of pipeline is optimized,and the layout scheme of oblique pipe is put forward. The number of corners is reduced,acute corners are instead of right-angled corners. It can not only reduce the resistance of coal pipe,but also balance the resistance of coal mill outlet pipe. It can also reduce the output of a fan,improve the uniformity of coal powder,and improve the boiler fire and burn. The improvement of coal pipeline shows that the boiler economy and safety have been improved.
引文
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[4]刘明,孟桂祥,严俊杰,等.火电厂除尘器前烟道流场性能诊断与优化[J].中国电机工程学报,2013,23(11):1-7.
[5]段学农,薛敏,程刚,等.直吹式制粉系统制粉单耗偏高原因分析及对策[J].湖南电力,2007,27(2):7-9.
[2]闫媛媛,魏乐,江效龙,等.球磨机制粉系统的系统动力学建模与仿真[J].湖南电力,2015,35(5):12-15.
[3]袁野,倪景峰,刘丽华.横掠圆管的二维流场有限差分分析[J].电力科学与工程,2007,23(3):48-51.
[4]刘明,孟桂祥,严俊杰,等.火电厂除尘器前烟道流场性能诊断与优化[J].中国电机工程学报,2013,23(11):1-7.
[5]段学农,薛敏,程刚,等.直吹式制粉系统制粉单耗偏高原因分析及对策[J].湖南电力,2007,27(2):7-9.