Laser ammonia escape online monitoring system

The laser ammonia escape online monitoring system adopts high-temperature heat tracing extraction technology to continuously monitor gases in industrial processes. The system consists of three parts: sampling and transmission unit, preprocessing and control unit, and analysis unit. It is mainly used for gas emission monitoring and process control in many industrial fields, such as coal-fired power plants, aluminum plants, steel plants, smelters, waste to energy plants, cement plants and chemical plants, glass plants, etc.

The analyzer adopts the principle of Tunable Diode Laser Absorption Spectroscopy (TDLAS), which can measure the concentration of specific gases in the process gas composition, including NH3, H2S, HCL, HF, etc. This system has the characteristics of high sensitivity, fast response speed, no interference from background gases, non-contact optical measurement, etc., providing a reliable guarantee for real-time and accurate reflection of changes in hydrogen chloride.

working principle

Tunable semiconductor laser absorption spectroscopy (TDLAS) is essentially a spectral absorption analysis technique that utilizes the selective absorption characteristics of gas molecules towards specific wavelength lasers to analyze changes in laser absorption intensity and obtain gas concentration. The difference between it and traditional infrared spectroscopy absorption technology is that the spectral width of semiconductor lasers is much smaller than the broadening of gas absorption lines (as shown in Figure 1). Therefore, semiconductor laser absorption spectroscopy technology is a high-resolution spectral absorption technique.

Instrument Features

The laser ammonia escape online monitoring system has the following main features:

N adopts the hot and humid sampling method, which is not limited by on-site installation conditions, has wide applicability, and is easy to use and maintain;

Using TDLAS high-resolution spectroscopy technology, the measurement is not affected by the interference of other gases, which can effectively reduce the interference of dust or background gases. This characteristic has significant advantages compared to other analysis methods;

The n system has the advantages of fast response speed and high sensitivity. In practical applications, its resolution can reach 0.1ppm, which can meet the control requirements of industrial systems;

1.3 Technical Parameters