Abstract:

This article analyzed the feasibility of using wax oil for vulcanization during the operation of a fixed bed residue hydrogenation unit. A certain company has adopted whole process VGO sulfurization technology for the first time to pre sulfurize fresh catalysts. Whole process sulfurization can save 16 hours of equipment operation time, reduce the amount of diesel used during equipment operation, and reduce the production of unqualified VGO by 720 tons. In the low-temperature vulcanization stage, the sulfur uptake rate of VGO sulfurization is higher and the sulfurization is more uniform. A comparative analysis was conducted on the catalytic performance of VGO sulfurization and staged sulfurization. Under the same process conditions and feedstock properties, both catalysts vulcanized in different ways have the same high impurity removal rate. The whole VGO sulfurization catalyst has the same activity as the staged sulfurization catalyst. The catalyst using whole VGO sulfurization has a relatively long operating cycle, indicating that the stability of the whole VGO sulfurization catalyst is relatively high. Whole VGO sulfurization has many advantages such as simple operation, resource conservation, and reducing activity. It has reference significance for other similar devices and provides valuable experience for optimizing pre vulcanization operations in future similar devices.

Key words: residue hydrogenation unit, oxidation state, catalyst, pre-vulcanization, whole process VGO sulfurization, desulfurization rate, denitrification rate, carbon residue removal rate

摘要：

分析了固定床渣油加氢装置开工全部使用蜡油硫化方案的可行性。某公司首次采用全蜡油硫化对新鲜催化剂进行预硫化，全蜡油硫化可节省装置开工时间16 h,减少装置开工柴油使用量，减少产生不合格蜡油720 t,在低温硫化阶段蜡油硫化的上硫率更高，硫化更均匀。对比分析了全蜡油硫化与分阶段硫化的催化剂性能，在工艺条件、原料性质基本相同的条件下，两种不同方式硫化后的催化剂杂质脱除率同样高，活性相当。使用全蜡油硫化的催化剂运行周期相对较长，说明全蜡油硫化催化剂的稳定性较高。全蜡油硫化具有操作简单、节约资源、还原活性好等优点，对于其他同类装置具有借鉴意义，为今后同类装置开工优化预硫化操作提供了宝贵经验。

关键词: 渣油加氢装置, 氧化态, 催化剂, 预硫化, 全蜡油硫化, 脱硫率, 脱氮率, 脱残炭率