With the acceleration of urbanization and the increase of industrial enterprises, industrial waste gas emissions continue to rise, resulting in increasingly serious urban air pollution. As an important component of industrial waste gas, VOCs (volatile organic compounds) control and monitoring have become hot and difficult issues in the field of environmental protection. This article will discuss the monitoring technology and treatment methods of VOCs in industrial waste gas, with a view to contributing to the blue sky defense war.
1. Monitoring technology for VOCs
In order to effectively control VOCs, it is first necessary to accurately monitor their emissions. Currently, the mainstream VOCs monitoring instruments on the market mainly include PID method VOCs online monitors and FID method VOCs online monitors.

PID method (photo ionization gas sensor method): This method monitors VOCs through photo ionization gas sensors. During the sampling process, external gas is introduced into the sensor through pumping for detection, thereby measuring the concentration of VOCs in industrial waste gas. This monitoring instrument has functions such as real-time monitoring, wireless transmission and data cloud storage, providing environmental protection departments with convenient data acquisition and management methods.
FID method (hydrogen flame ionization detection method): This method uses the flame generated by the combustion of hydrogen and air as energy. When the VOCs gas enters the flame, chemical ionization occurs at high temperature, forming an ion flow. By measuring the intensity of the ion current, the concentration of VOCs can be calculated. The FID method has high sensitivity and accuracy and is suitable for monitoring a variety of organic compounds.
In practical applications, appropriate monitoring methods should be selected according to different industrial environments and exhaust gas characteristics to ensure the accuracy and effectiveness of data.
Photoion gas sensor (PID) sensor selection. Gongcai.com provides PID sensors in various ranges : PID-AH5, PID-AR5, PID-AY5, PID-A15, PID-AH, PID-A1, as follows: 2. VOCs governance methods For the governance of VOCs, we can start from the following aspects:
Use clean raw materials: Replace raw materials that easily produce volatile gases as much as possible to reduce the generation of VOCs.
Adopt clean technology: Continuously develop new technologies during the production and manufacturing process, optimize the production process, and reduce the generation of volatile gases.
Strengthen unorganized emission control : carry out organized and planned transfer and transportation of waste gas to reduce unorganized emissions.
Build treatment equipment: Add treatment equipment to the industrial production process, such as absorption method, adsorption method, catalytic combustion method, combustion method, condensation method, etc., and select appropriate treatment methods according to the characteristics of waste gas generated by different industries.
Real-time monitoring and treatment in parallel: By installing online monitoring instruments, real-time monitoring of waste gas emissions is achieved, and the treatment plan is adjusted in a timely manner based on the monitoring results to ensure the treatment effect.
3. Conclusion
The monitoring and treatment of VOCs in industrial waste gas is an important task in the field of environmental protection. By using advanced monitoring technology and effective treatment methods, we can better understand the emission of VOCs and take targeted measures to control it. In the future, with the continuous advancement of science and technology and the continuous improvement of policies, we are confident that we can win the battle to defend the blue sky and create a better living environment for the people.