Product advantage analysis of ammonia slip online monitoring system

The ammonia escape on-line monitoring system adopts tunable semiconductor laser absorption spectroscopy technology, which is essentially a spectral absorption analysis technology. It uses the selective absorption characteristics of gas molecules for specific wavelength lasers, and analyzes the changes in laser absorption light intensity to obtain gas. concentration. The difference between it and the traditional infrared spectrum absorption technology is that the semiconductor laser spectrum width is much smaller than the broadening of the gas absorption line. Therefore, the semiconductor laser absorption spectrum technology is a high-resolution spectral absorption technology. The whole system realizes in-situ installation, real-time measurement, automatic purging, and low detection limit. Application range of ammonia escape online monitoring system: It is suitable for the monitoring and process of ammonia escape emission of SCR or SNCR out-of-stock devices such as coal-fired power plants, aluminum plants, steel plants, smelters, glass plants, waste-to-energy plants, cement plants, chemical plants, etc. monitor. Advantages of ammonia escape online monitoring system: The system structure is convenient for later maintenance, calibration, cleaning, and function expansion. The laser extraction measurement method adopts the extraction sampling method. The flue gas is extracted from the flue, and after dust removal and purification, it enters the gas analysis room and is detected by TDLAS technology. The whole process of sampling is heated, and the data of gas concentration to be measured is true and reliable. The unit can be calibrated and zeroed with standard gas detection. The influence of flue vibration, thermal expansion and other factors on laser detection is avoided. It is suitable for the monitoring of flue gas pollution sources with harsh environments and complicated working conditions. Solve the in-situ laser analysis system's large cross-section, micro-concentration flue detection distortion; flue vibration, environmental temperature changes, resulting in inaccurate light alignment caused by factors such as changes in flue stress; high dust and high moisture affect laser detection Transmittance; flue gas dust and corrosive gases are adsorbed on the surface of the lens, causing lens coking and fouling to affect laser detection; online calibration cannot be performed and other application problems.