关键词: 硫磺回收装置, 扩能改造, 二氧化硫, 达标排放

Abstract: In 2015, the environmental protection regulation GB 31570—2015 Emission standard of pollutants for petroleum refining industry was issued. The regulation stipulates that the emission concentration of SO₂ in flue gas should be less than 100 mg/m³. With the upgrading of oil quality, the capacity of the supporting sulfur unit of SINOPEC Beihai Company was significantly insufficient, and the sulfur unit was facing the dual pressure of capacity expansion and emission reduction. Therefore, the capacity expansion and emission reduction adaptability of the sulfur unit were reformed, and the performance of the reformed unit was systematically evaluated. The results showed that the maximum capacity of the unit can be increased to 90 kt/a, and the operating load can be increased by more than 40%. Under this condition, the unit had low energy consumption, high single pass sulfur conversion rate and total sulfur recovery rate, and SO₂ emission concentration of flue gas was less than 100 mg/m³, which met the requirements of GB 31570—2015. The operation indexes were good, the expected effect was achieved, and the requirements of upgrading and capacity expansion were met.

Key words: sulfur recovery unit, capacity expansion revamping, sulfur dioxide, standardized discharge