Abstract:

The optimization process of hydrogen utilization in jet fuel hydrogenation unit is discussed. The original design is a once-through process, and its hydrogen recovery rate is high, but there is a problem of salt deposition in the gas valve of the make-up hydrogen compressor. The stable operation of the make-up hydrogen compressor is ensured by changing the gas from low pressure separator after reaction to PSA. From the perspective of energy conservation, changing the hydrogen supply mode from cold hydrogen to hot hydrogen can save 840,000 yuan annual. By adding a jet fuel hydrogenation recycle hydrogen compressor, the quantity of make-up hydrogen for the jet fuel hydrogenation unit can be reduced, and the hydrogen supply capacity of the diesel hydrogenation unit can be increased by 3.0 dam³/h. After the once-through process of hydrogen is changed to recycle hydrogen, the gas from low pressure separator after jet fuel hydrogenation reaction is reduced by 5.0 dam³/h, which can effectively reduce the hydrogen loss of the unit.

Key words: jet fuel hydrogenation unit, diesel hydrogenation unit, once-through process, hydrogen, gas from low pressure separator, hot hydrogen, recycle hydrogen compressor

摘要：

对喷气燃料加氢装置的用氢流程优化进行了探讨。原设计一次通过流程氢气回收率高，但存在新氢压缩机气阀结盐问题。通过将反应后低分气改去变压吸附(PSA),保障了新氢压缩机的稳定运行。从节能角度考虑，将氢气供应方式由冷氢改为热氢，可节省燃料成本84万元/a。通过新增喷气燃料加氢循环氢压缩机，可降低喷气燃料加氢装置补充氢量，提高柴油加氢装置供氢能力3.0 dam³/h。氢气一次通过流程改为循环氢方式后，喷气燃料加氢反应低分气量减少5.0 dam³/h,可有效降低装置氢气损失。

关键词: 喷气燃料加氢装置, 柴油加氢装置, 一次通过, 氢气, 低分气, 热氢, 循环氢压缩机