基于数据融合的机组燃煤可磨性在线检测  

On-line Detection of Plant Fuel Coal Grindability Based on Data Fusion

作　　者：赵征[1] 刘伟[2] 张振岩[2] 田亮[1] 

机构地区：[1]华北电力大学自动化系,河北保定071003 [2]新疆天富热电股份有限公司,新疆石河子832000

出　　处：《热能动力工程》2009年第6期773-776,共4页Journal of Engineering for Thermal Energy and Power

基　　金：国家863计划基金资助项目(2007AA04Z163)

摘　　要：火电机组普遍面临煤质多变的问题,煤质的波动不但影响风/煤静态优化配比关系,对于中速磨正压直吹式制粉系统,煤质的改变影响制粉惯性的改变,从而影响风/煤在动态过程中的优化配比关系。针对MPS型中速磨正压直吹式制粉系统,制粉惯性受煤质和制粉系统运行状况影响而变化的问题,提出了广义可磨性的概念-Ke。通过统计和机理分析,给出了广义可磨性Ke和判断基准-Ke的表达式,二者对比可以判断可磨性的变化。与电厂煤质分析报告中主要指标在不同月份的变化趋势也进行对比分析,结果显示,广义可磨性与实际煤质可磨性的变化趋势吻合,验证了广义可磨性描述的正确性和合理性。Thermal power plants universally face an ever-changing coal quality problem and the fluctuation in coal quality may also influence air/coal static optimization matching relationship.For the positive-pressure direct-fired system of a race pulverizer,the change of coal quality may affect the change of milling inertia,thus influencing the optimization matching relationship of the air and coal during a dynamic process.In the light of the problem that the milling inertia of the above system of a MPS type race pulverizer is affected by the coal quality and the operating status of the milling system,a generalized grindability concept e was presented.On the basis of a statistical and mechanism analysis,expressions of the generalized grindability Ke and judgement criterion e were given.By comparing these two values,one can determine the grindability change.A contrast analysis of the variation tendency of the main indexes in various months of a power plant coal quality analysis report shows that the generalized grindability assumes a variation tendency identical with the actual coal quality grindability,verifying the correctness and rationality of the generalized grindability description.

关 键 词：燃煤可磨性 数据融合 在线检测 制粉系统 

分 类 号：TK223.25[动力工程及工程热物理—动力机械及工程]