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本文以中海油惠州石化 340 万 t/a 柴油加氢装置的分馏系统进料为基准，利用模拟软件对双塔方案、单塔方案分别进行计算，并进行技术对比。计算结果表明，不考虑石脑油中硫化氢含量影响时，“微湿汽提 + 重沸炉”单塔方案最优。“,”Basing on CNOOC Huizhou Petrochemicals Company Limited'3400KTA diesel hydrotreating unit, this paper executes technical comparison for two towers process and single tower process according to calculation and practical data. The results show that the optimized single tower process is superior if the naphtha containing hydrogen sulfide can be sent to consequent unit.