关键词: 催化裂解, 油浆, 低硫船用燃料油, 调合配比, 密度

Abstract: This paper introduces the deashing of DCC slurry and the test of blending low sulfur marine fuel oil with deashing slurry. Cross flow filtration technology is adopted for DCC slurry deashing. With the filtered DCC slurry as the main feedstock, the index performance of the blended low sulfur marine fuel oil can meet the requirements of the national standard. The test results show that the cross flow filtration technology can reduce the ash of DCC slurry to 0.004%, the kinematic viscosity to 105.72 mm²/s and the mass fraction of aluminum and silicon to 23.1 μg/g, the recovery rate of filtered slurry is more than 85%. Marine fuel oil RMG 180 is produced by adopting the scheme that the blending ratio of DCC filtered slurry and atmospheric residue and the first side line of atmospheric tower is 48%∶32%∶20%. The kinematic viscosity of the blended oil is 98.326 mm²/s, and the mass fraction of aluminum and silicon is as low as 35.3 μg/g, the density at 20 ℃ is 963.7 kg/m³, the ash is 0.006%, the acid value is 0.01 mgKOH/g, and the carbon aromaticity index is 838.42. On the premise of the maximum mixing ratio of filtered slurry, the oil properties meet the best technical requirements of low sulfur marine fuel oil.

Key words: DCC, slurry, low sulfur marine fuel oil, blending ratio, density