Project  background

TVOC is an organic compound whose boiling point is not less than 10Pa or 101.325kp standard atmospheric pressure and boiling point is not higher than 260℃ at 20℃. Volatile organic compounds mainly include non-methane total hydrocarbons (alkanes, alkenes, alkynes, aromatic hydrocarbons), oxygen-containing organic compounds (aldehydes, ketones, alcohols, ethers, etc.), halogenated hydrocarbons, nitrogen-containing compounds, sulfur-containing compounds, etc. .

Studies have shown that my country's annual V0Cs emissions are about 30 million tons, of which industry accounts for 43%, transportation accounts for 28%, living sources account for 15%, and agricultural sources account for 14%. Among them, industrial emission sources are generally chemical industry, oil refining industry, chemical raw material production, pharmaceutical, coking, synthetic fiber, electronics manufacturing, automobile manufacturing, furniture manufacturing, wood industry, packaging and printing, equipment manufacturing, rubber industry, paint industry , Pesticide industry, etc.　　

VOCs, as one of the important subdivision areas in environmental monitoring, its market space is mainly reflected in two aspects of air quality monitoring and pollution source monitoring in key areas; its role can provide environmental protection departments with the status of monitoring regional air quality and monitoring of corporate emissions data ; At the same time, it can provide vouchers for environmental protection disputes; 　　

At present, the applicable industries for online monitoring of VOCs include petrochemicals, biopharmaceuticals, packaging and printing, electronic semiconductors, surface coatings, rubber and plastic products, furniture manufacturing, circuit boards, automobile manufacturing and maintenance. The applicable environmental monitoring is generally a large national standard air station , A small early warning air station.

Scheme details

The sampling unit collects on-site exhaust gas or measured gas. The pretreatment unit cools, dehumidifies, and filters the gas, and keeps the temperature and humidity of the measured gas constant within a certain range. The gas detection unit-PID photoion detection analysis is delivered. Gas, the measured gas concentration is displayed on the display screen in real time, and the data signal is transmitted to the terminal such as PLC or computer, or it can be transmitted to the cloud server through wireless GPRS or network, or connected to the environmental protection bureau through the data acquisition instrument. Real-time supervision.