火焰检测器指示值偏低或误判的原因分析及解决措施  

CAUSE ANALYSIS FOR SOMEWHAT LOW INDICATING VALUE OF THE FLAME DETECTOR OR MISJUDGEMENT OF THE VALUE AND RESOLVING MEASURES THEREOF

作　　者：王春昌[1] 杨树民[2] 张义政[2] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032 [2]华能日照电厂,山东日照276826

出　　处：《热力发电》2006年第9期21-23,共3页Thermal Power Generation

摘　　要：分析了电站燃煤锅炉个别燃烧器火检指示值偏低或误判的原因,提出了调整火检的检测距离,消除火检视线遮挡,以及修改火检的临界值和背景值等解决措施。日照电厂2台锅炉的应用实践表明,在煤粉气流稳定着火燃烧的情况下,调整火检的检测距离不仅可解决个别火检指示值偏低的问题,而且可节省大量的稳燃油,经济效益显著。The causes leading to somewhat low indicating value of the flame detector for very few burners in coalfired utility boiler or misjudgement of the value have been analysed, and resolving measures, such as adjusting the detection distance of the flame detector, eliminating shield of vision for the flame detector, revising the critical value and background evaluation etc., being put forward. Practice of application on two boilers in Rizhao Power plant shows that the adjustment of detection distance not only can solve the problem of somewhat low indicating value for very few flame detectors, but also can save large amount of fuel oil used for stabilizing combustion, having remarkable economic benefit under condition of stable ignition and combustion for pulverized coal and air flow.

关 键 词：锅炉 燃烧器 火焰检测器 指示值 检测距离 

分 类 号：TK223.23[动力工程及工程热物理—动力机械及工程]