Abstract: Large amount of organized and unorganized VOCs emissions in refining and chemical enterprises have a great impact on particulate matter and ozone concentration in the atmosphere. Since the 13th Five-Year Plan period, company A has conducted in-depth exploration and practice on VOCs emission reduction. By adoptingmanyemission reduction measures, such as oil vapor recovery, high-efficiency sealing revamp of floating plateof storage tank, upgrading of breathing valves to different types, organized recovery of fugitive emissions, VOCs incineration and normalized leak detection and repair work,etc.,the emission of VOCs has fallen from 4230 t in 2015 to 2157 t in 2022, with a reduction rate of 49%, achieving significant results.

Key words: oil vapor recovery, high efficiency seal, breather valve, incineration, leak detection and repair