【摘要】 利用真空回转保湿制氮技术及双工制氮集成装备对大型菜籽油储罐进行了氮气气调保质技术研究。研究结果表明，相较于常规储藏，氮气气调技术可有效延缓菜籽油酸价上升趋势，储藏期内2号罐和3号罐的上、中、下层油样含皂量均维持在≤0.03的国家标准限值内，且氮气浓度>99.5%时品质保持效果更为显著；该技术对菜籽油的可挥发物含量、烟点值等方面的品质指标无显著影响，可挥发物和烟点值分别在0.07%～0.12%,206℃～210℃范围内。进一步对储油罐氮气气调降氧效率、低氧维持、充氮时机及能耗等方面分析发现，对于同一规格型号的储油罐，罐内储油量与降氧效率呈正相关性，储油量越多，充氮降氧效率越快，且夜间充氮降氧效率显著优于白天，夜间和白天开启制氮机时单位时间内的降氧幅度分别为0.39%/h和0.21%/h。本研究验证了真空回转保湿制氮技术及双工制氮集成装备在储油罐应用中的提氮速率优化和能耗控制方面的技术优势，为构建低碳高效的现代化油脂储藏体系提供了理论和技术支撑。更多还原

【Abstract】 This study investigates the nitrogen-controlled atmosphere preservation efficacy in large-scale oil storage systems. Employing vacuum rotary moisture-preserving nitrogen production technology coupled with duplex nitrogen production integrated equipment, we systematically evaluated the quality preservation dynamics of rapeseed oil under nitrogen-regulated storage conditions in large rapeseed oil storage tanks. The experimental findings demonstrate that compared with conventional storage methods, nitrogen atmosphere regulation significantly delays the upward trend of rapeseed oil acid value. Throughout the storage period, soap content in stratified oil samples(upper/middle/lower layers) from Tanks 2 and 3 consistently maintained compliance with the national standard limit of ≤0.03, with enhanced preservation effects observed at nitrogen concentrations exceeding 99.5%. Critical quality indicators including volatile matter content and smoke point remained unaffected by the nitrogen intervention, with the two indicators maintained within the ranges of 0.07%～0.12% and 206℃～210℃ respectively. Further analysis of deoxygenation efficiency, low-oxygen maintenance, nitrogen filling timing and energy consumption of nitrogen-controlled atmosphere in storage tanks revealed a positive correlation between oil storage volume and deoxygenation efficiency in standardized tanks: the larger the oil storage volume, the faster the nitrogen filling and deoxygenation efficiency. Notably, the deoxygenation efficiency of nitrogen filling at night is significantly better than that during the day, achieving a deoxygenation rate of 0.39%/h versus 0.21%/h during diurnal operations. This study validates the technical advantages of vacuum rotary moisture-preserving nitrogen production technology and duplex nitrogen production integrated equipment in nitrogen production rate optimization and energy consumption control for storage tank applications. These empirical results validate the engineering feasibility of vacuum rotary moisture-regulating nitrogen technology for modern low-carbon oil storage applications, providing theoretical and technical support for the construction of a low-carbon and efficient modern oil storage system.更多还原