Working principle of Fireye flame detector 95DSS3 flame detector

Working principle of Fireye flame detector 95DSS3 flame detector

The combustion of oil, coal, or gas fuels essentially involves the release of fuel chemical energy in the form of electromagnetic waves. Burner flames generally emit almost continuous emission spectra, and their emission sources are high-temperature carbon particles, micro powder carbon particle groups, and gases generated during the combustion process. The intermediate products in different fuel combustion processes are not completely the same or the proportion of intermediate products varies, The spectra emitted by different combustion intermediates are not exactly the same, which is the basis for selecting different types of flame detectors. C2 emits visible light (with an emission wavelength of about 473.7 nanometers), CH compounds emit spectra in the ultraviolet to blue range, carbon particle groups emit spectra in the red range, and three atomic gases such as CO2, H2O, and SO2 emit infrared light. The spectral distribution characteristics of different fuels are that oil flames contain a large amount of infrared, some visible light, and so on With a small amount of ultraviolet radiation, coal powder flames contain a small amount of ultraviolet radiation, abundant visible light, and a small amount of infrared radiation. The gas flame has rich ultraviolet, infrared and less visible light, and for a single burner flame, its radiation spectrum is regularly distributed along the flame axis. For example, the pulverized coal burner in the pulverized coal boiler is divided into four areas along the axis from the inside out, namely preheating area, initial combustion area, safe combustion area and burnout area. In the initial combustion area, not only the visible light is rich, but also the energy radiation rate changes intensively, Therefore, the flame detection probe is accurately aligned with the initial combustion zone selection of the burner.