Nitrogen oxides refer to compounds composed only of nitrogen and oxygen, including a variety of compounds, such as nitrous oxide (N2O), nitric oxide (NO), nitrogen dioxide (NO2), nitrogen trioxide (N2O3), nitrogen tetroxide (N2O4), and nitrogen pentoxide (N2O5), etc. In order to better monitor the concentration of nitrogen oxides continuously, nitrogen oxides online monitoring systems have been installed in many places. So do you know the main principle of NOx online monitoring system ? The following is a brief introduction by yi yun Tian:

Main principles of the nitrogen oxides on-line monitoring system:

The sampling unit of the nitrogen oxide online monitoring system collects the flue gas or measured gas on the site. The pretreatment unit cools, dehumidifies and filters the dust, and makes the temperature and humidity of the measured gas constant in a certain range, the gas detection unit detects and analyzes the delivered gas, displays the measured gas concentration on the display screen in real time, and transmits the data signal to terminals such as PLC or computer, or transmits it to local environmental protection bureaus or cloud servers through wireless GPRS(DTU) or network, and users read the data from the server to realize global networking monitoring and analysis.The whole process is automated and does not require human intervention.

nitrogen oxide on-line monitoring system is suitable for gas detection and analysis in low dust, high temperature and high humidity occasions. if the dust content of the measured gas is high, it is necessary to select an automatic blowback system or reserve a blowback interface to connect compressed air regularly for blowback, otherwise, regular manual maintenance cleaning dust filter is required. The TH-2000-C gas pretreatment system has a built-in two-stage electronic condensation dehumidification system and a 0.5-meter fine dust filter sampling head (flange installation), with a sampling distance of 40 meters, automatic cooling, automatic drainage, and tar filtration. For the detection and analysis of gas soluble in water and the outdoor freezing environment in winter, to prevent the sampling pipeline from freezing, it is necessary to select the heat preservation and electric heat tracing constant temperature control system. If the dryness and cleanliness of the measured gas are required to be very high, please select the TH-3000 series, including heat preservation and electric tracing constant temperature control system, two-stage high-efficiency compressor water-cooled dehumidification system, which can stably control the dew point of the gas at 4 ℃ or 5 ℃.

In summary, it is the main principle of the nitrogen oxide online monitoring system. It is the various advantages that make the nitrogen oxide online monitoring system can be widely used in the gas analysis industry, such as: gas boiler exhaust monitoring, pollution source online monitoring, flue gas emissions, desulfurization and denitrification, boiler exhaust, sewage pipeline gas detection analysis, high temperature and high humidity gas detection analysis and other detection occasions.