Abstract: In order to improve the processing efficiency of wax oil hydrogenation unit in a petrochemical company, a series of optimization measures were carried out to ensure the long-term stable operation of the unit. In terms of optimizing the properties of feedstock, the medium atmospheric distillate was blended into the wax oil. In order to accurately grasp the influence of the properties of the optimized mixed feedstock on the operating conditions, the evaluation test of wax oil hydrogenation was carried out. In the presence of catalyst, using the optimized mixed feedstock, the process conditions of reaction temperature and space velocity were obtained when the products met the requirements. The desulfurization rate reached 80%, the nitrogen removal rate reached 40%, and the carbon residue removal rate reached 75%. Through analysis, the yield of light fraction with final boiling point less than 350 ℃ was about 21%, and the yield of heavy fraction with final boiling point higher than 350 ℃ was about 79%. Under the test process conditions, after a long period of stable operation test, the hydrotreating effect was obvious, and the quality and performance of the product were stable.

Key words: wax oil hydrogenation unit, feedstock, evaluation test

摘要： 某石化公司为了提高蜡油加氢装置加工效益开展了系列优化措施,以确保蜡油加氢装置长周期平稳运行。对原料进行了优化,在蜡油原料中掺炼了中质常压馏分油,为了准确掌握优化后的混合原料性质对操作条件的影响,实验室开展了蜡油加氢评价试验。结果表明:优化后的混合原料在催化剂存在下,得到了试验产品满足指标要求时的反应温度与空速,产品的脱硫率达到80%,脱氮率达到40%,脱残炭率达到75%;通过切割分析,终馏点小于350 ℃的轻馏分收率为21%左右,终馏点大于350 ℃的重馏分收率79%左右;在试验工艺条件下经过长周期稳定运行试验,其试验产品的加氢精制效果明显且产品质量稳定。

关键词: 蜡油加氢装置, 原料, 评价试验