What ultraviolet spectral range does the ultraviolet flame detector use for flame detection?
Publish Time: 2024-12-11
The ultraviolet flame detector plays a pivotal role in the safety monitoring of many industrial combustion equipment such as boilers. The specific ultraviolet spectral range on which its flame detection is based is the core basis for its precise work.
Usually, the ultraviolet flame detector mainly detects flames in the ultraviolet spectral range of 185-260 nanometers. In this spectral range, a strong ultraviolet radiation signal is generated during the flame combustion process. When the fuel burns in the boiler, the hydrocarbons and other substances in it undergo chemical reactions, and the high-temperature excited state molecules produced will transition back to the ground state, radiating ultraviolet light in the process, and the ultraviolet light in the 185-260 nanometer band has a unique identification.
The advantages of choosing this spectral range are significant. First of all, the ultraviolet light in this band has a higher intensity and relatively obvious characteristics in the flame radiation. Compared with visible light and other bands of ultraviolet light, it is relatively less disturbed by natural light and lighting in the environment. For example, there are a lot of lighting lights in industrial plants, but the spectral components of these lights are significantly different from the ultraviolet radiation of flames at 185-260 nanometers, which enables the ultraviolet flame detector to identify flame signals more accurately and reduce misjudgment. Secondly, this spectral range has good response characteristics for flames produced by the combustion of many common fuels. Whether it is coal, natural gas or fuel oil, they will produce detectable ultraviolet signals in this band when burning, thus ensuring the versatility and wide applicability of the detector. Furthermore, in this specific spectral range, the ultraviolet flame detector can quickly capture the signal at the early stage of flame generation, thanks to the close connection between the ultraviolet rays in this band and the flame combustion process. Its rapid response characteristics provide the possibility of timely detection of abnormal flame conditions in the boiler, which helps to take corresponding measures at the first time, such as alarming, starting safety protection devices, etc., effectively ensuring the safety and stability of boiler operation, preventing serious safety accidents such as explosions and overheating caused by flame failures, and ensuring the safe and orderly progress of industrial production processes.
