At present, photochemical pollution caused by volatile organic compounds (VOCs) has become an important environmental problem faced by some cities in China. The evaporation of oil products from urban gas stations is an important source of VOCs emissions, and the chemical activity of VOCs species contained in oil vapor is very high. Therefore, the contribution rate of VOC emissions from gas stations to ozone generation cannot be ignored. Recently, Guangzhou has been experiencing sustained high temperatures, strong sunshine, and an increase in ozone pollution. On July 28th, Guangzhou Television conducted an on-site interview regarding the "physical examination" service provided by the Liwan Branch of the Guangzhou Ecological Environment Bureau to the Longxi Avenue gas station in Liwan District.
In order to strengthen the comprehensive rectification of VOCs in key industries and promote the improvement of air quality, Guangdong Mingqin Environmental Protection Technology Co., Ltd., under the coordination of the ecological environment department of Liwan District, Guangzhou, carried out a special action to investigate VOCs leaks at gas stations in Liwan District.
On site, Mingqin Environmental Protection Technology engineers conducted a comprehensive inspection of the gas station, focusing on whether the oil and gas recovery system was operating normally and whether the refueling operation procedures were standard and standardized. And use portable VOCs detectors, portable methane/non methane total hydrocarbon monitors, VOCs gas leak detection infrared thermal imagers and other high-tech instruments to conduct on-site testing, effectively eliminating blind spots and hidden dangers. In the verification work, unmanned aerial vehicle cruising, online monitoring, and navigation monitoring were also used to improve the regulatory efficiency of VOCs leakage and reduce interference with enterprises.
So far, a total of 42 oil and gas leakage problems have been discovered in the project, and the leakage points have been sealed. Mingqin Environmental Protection Technology will establish a long-term management mechanism, adopt a combination of irregular inspections and supervision and testing, and continue to promote the VOCs emission reduction work of gas station enterprises, effectively reducing atmospheric pollution caused by oil and gas volatilization, eliminating environmental safety hazards, reducing energy waste, and reducing ozone pollution.
The leakage detection value of oil and gas sealing points should not exceed 500 μ mol/mol.
When using infrared camera to detect the sealing points of the oil and gas collection system, there should be no oil or gas leakage.
3. The average concentration of non methane total hydrocarbons in any hour at the boundary of the enterprise should not exceed 4 mg/m3. -------Quoted from GB 20952-2020 Gas Station Air Pollutant Emission Standards, GB 20951-2020 Oil Transport Air Pollutant Emission Standards, and GB 20950-2020 Oil Storage Air Pollutant Emission Standards.
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The PVD-9200 portable VOCs detector adopts FID (hydrogen flame ionization detector) and PID (photoionization detector) detection technology, which can quickly detect volatile organic compounds in ambient air and unorganized emissions, as well as toxic and harmful gases in ambient air and unorganized emissions. Equipped with high concentration non-stop technology to ensure the normal operation of equipment under high VOCs concentration conditions. Can be applied to on-site inspections (supervisory testing) of key enterprises involved in VOCs emissions and emergency testing of unorganized emissions.
GLD-9500 VOCs gas leak detection infrared thermal imager is a non-contact gas leak detection instrument for volatile organic gases (VOCs). It uses a medium wave cooled infrared detector to quickly detect VOCs leaks in the form of images and accurately locate the source of leaks or emissions, achieving long-distance and rapid detection of VOCs gas leaks over a large area. Simultaneously supporting Bluetooth and wireless network connection, the portable VOCs detector can display both FID and PID detection data on the screen.
The GCD-9500 is equipped with a hydrogen generation device, which solves the safety hazards that may exist when users store gas cylinders, without the need to purchase hydrogen, reducing costs. The instrument adopts a fully automatic electronic flow control system with high standard control accuracy, and also has manual/automatic calibration functions, making on-site operations more efficient and fast. Can be used to accurately measure methane and non methane total hydrocarbons in ambient air, factory boundary, and exhaust gases.
