Abstract:

 In order to effectively deal with heavy pollution weather, scientifically reduce the discharge of pollutants and continuously improve the ambient air quality, the feasibility of directly delivering hydrogenated gasoline to PX unit instead of sending it to tank farm has been analyzed. The risk of the direct delivery process has been assessed, and the risk identification indicators and risk control measures have been summarized. Relevant process parameters have been optimized based on the actual production. After the direct delivery process is put into use, the VOCs values detected at each detection site are significantly reduced. The leakage of light components and the total emission of air pollutants are significantly decreased. These results show that the new direct delivery process can effectively avoids the emission of non-methane total hydrocarbon to the environment, which are caused by the leakage of hydrogenated gasoline from large and small breathing valves of tank T-0003A/B or the safety accessories. The direct delivery process is expected to be an effective new measure for preventing and controlling heavy pollution weather, and play a positive and effective role in promoting the fine control of heavy pollution weather and establishing a proactive, harmonious and effective air pollution emergency system.

Key words: hydrogenated gasoline, organic hydrocarbon volatilization, VOCs reduction, control of heavy pollution weather