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火力发电站中锅炉主燃烧器的火焰检测器,一般广泛采用紫外线检测方式。三菱公司的火焰检测器也采用这种方式。所谓紫外线检测方式就是由探头中的“紫外线光敏管”对燃烧器火焰发出的紫外线进行放电反应,然后,对该放电脉冲进行适当处理,就得到“火焰有”、“火焰无”的接点输出。可是,在目前火力发电站的锅炉上,由于采取措施来减少燃烧产生的氮化物(NO_x),使炉内燃烧工况起了显著的变化,其后果引起燃烧器火焰放出的紫外线减少或衰减,为此,紫外线方式的检测器其检测信号的可靠
The main boiler flame detector in the thermal power station generally adopts the UV detection method. Mitsubishi’s flame detector also used this approach. The so-called UV detection method is by the probe in the “UV light tube” on the burner flame discharge UV discharge reaction, and then, the discharge pulse for proper treatment, you get “Flame”, “flame no” contact output. However, at the present boiler of the thermal power plant, since the measures to reduce the nitrous oxide (NO x) generated in the combustion make a significant change in the combustion condition in the furnace, the consequence thereof is to reduce or attenuate the ultraviolet rays emitted by the burner flame, For this purpose, UV-based detectors detect the reliability of the signal