At present, most of the oil sent and received at domestic gas stations is mainly gasoline. It is determined by the physical properties of gasoline and other light oils with low boiling point (50~200e) and easy volatilization. The generation of hydrocarbon VOCs in gas stations is inevitable. It can be monitored using voc sensor and voc online monitoring system.
Under normal circumstances, the VOCs in the normal operation of gas stations are mainly generated in the two links of loading and unloading and refueling operations. During the loading and unloading operation, the oil tanker unloads the oil into the storage tank through the oil pipeline. The liquid level in the tank rises, forming a positive pressure. The saturated oil vapor in the tank is discharged into the atmosphere through the vent pipe (this process is also called "big breathing"). In the refueling operation, due to the non-tight connection between the refueling gun and the fuel tank port. A large amount of oil and gas is discharged from the fuel tank port into the atmosphere. Also oil is in storage. Due to changes in ambient temperature, there is also breathing loss in saturated oil and gas in the tank. But this part of the emissions is relatively small.
voc monitoring equipment：
VOC gases also wreak havoc on the atmosphere. VOC is one of the important reasons for the increase of atmospheric ozone concentration and the formation of regional photochemical smog, acid rain, and smog complex pollution. VOCs are precursors to the formation of PM2.5 and ozone. In the PM2.5 of the atmosphere, VOCs account for more than 25%. VOCs always contribute to the greenhouse effect, leading to global warming.
At present, photochemical pollution caused by volatile organic compounds (VOCs) has become an important environmental problem faced by some cities in my country. Oil evaporation from urban gas stations is an important source of VOC emissions. And the chemical activity of the VOC species contained in the oil vapor is very high. Therefore, the contribution rate of VOC emissions from gas stations to ozone generation cannot be ignored.
The VOC online monitoring system is aimed at the VOC gas present in the air. Combine wireless transmission technology, database technology, software technology and sensor detection technology. Real-time monitoring of temperature, humidity, VOC concentration and other related parameters in gas exhausted by gas stations. Through logical judgment and intelligent analysis. Output VOC level and alarm signal. So as to improve and enhance the ability of remote monitoring and early warning of atmospheric environment. When the environment deteriorates, it will be reminded to deal with it in time.