VOCs(VolatileOrganicCompounds) widely exist in living and industrial production environment. Most photochemical smog formed in the atmosphere has carcinogenic, teratogenic and mutagenic effects, which is extremely harmful to the environment and human health. Therefore, the online VOCs monitoring system is designed to comprehensively monitor VOCs emission and reduce its harm to the atmosphere and human body. So what gases are monitored by VOC online monitoring system? Lan Ju Intelligent Technology, a professional manufacturer of VOC online monitoring system, will answer your questions.
At present, many developed countries have promulgated corresponding laws to limit the emission of VOCs, and added VOCs to monitoring projects. There are 56 kinds of VOCs in the photochemical automatic monitoring system in the United States, and more than 30 kinds of VOCs are listed in Europe. China's Comprehensive Emission Standard for Air Pollutants (GB 16297-2004) strictly stipulates the emission limits of 33 kinds of air pollutants, and clearly stipulates the emission limits of benzene, toluene, xylene, phenols, aniline and nitrobenzene. These gases are the main monitoring direction of the existing VOC online monitoring system in China.
In the specific application of VOC online monitoring system, the monitoring items are different according to the different emissions of manufacturing industry. Stationary pollution sources VOCs mainly come from spraying industry, leather industry, petrochemical plant, printing industry, sewage/garbage treatment plant, gas station leakage, biomass, coal burning, semiconductor industry, metallurgy industry and so on. The main detection indicators are benzene series, non-methane total hydrocarbons and some volatile organic solvents.
The following table shows the requirements and standards for VOCS emission monitoring in waste gas in China.
According to the investigation of related literature, TVOC and hydrogen sulfide are the main monitoring factors for on-line monitoring of industrial organic waste gas in centralized industrial parks. The cooking fume produced by the catering industry mainly contains harmful substances such as benzene, toluene, xylene and polycyclic aromatic hydrocarbons, and the pollutants discharged during the operation mainly include settleable particles, fine particles and hydrocarbons. Automobile exhaust contains a large number of olefins and polycyclic aromatic hydrocarbons, such as butene, toluene, xylene, etc., among which the highest content is C8H 10, which may be xylene or ethylbenzene.
Therefore, what or what VOC online monitoring system can detect can refer to China's Comprehensive Emission Standard for Air Pollutants (GB 16297-2004). For more information about VOC online monitoring system, please visit Lan Ju Intelligent Technology official website.