石油炼制与化工 ›› 2023, Vol. 54 ›› Issue (10): 73-77.

• 加工工艺 • 上一篇    下一篇

变压器废油加氢再生工艺研究

任乔林1,王延臻2,张伟1,蔡世腾1,李钟灵1   

  1. 1. 国网湖北省电力有限公司孝感供电公司
    2. 中国石油大学(华东)化学化工学院

  • 收稿日期:2023-03-22 修回日期:2023-06-16 出版日期:2023-10-12 发布日期:2023-09-24
  • 通讯作者: 任乔林 E-mail:1634436353@qq.com

REGENERATION OF USED TRANSFORMER INSULATING OIL BY HYDROGENATION

#br#   


  • Received:2023-03-22 Revised:2023-06-16 Online:2023-10-12 Published:2023-09-24

摘要: 针对变压器废油因高温氧化和高压电场作用而产生的酸值升高、颜色变深、安定性和电气性能变差、耗电量增加等问题,使用自制Ni-Mo-W加氢催化剂,对变压器废油进行了直接加氢再生研究,考察了加氢反应条件对变压器废油性质和组成的影响。结果表明,采用直接加氢法对变压器废油进行再生后,其颜色变浅,安定性提高,电气性能变好,金属、多氯联苯和抗氧剂检不出,稠环芳烃含量降低,闪点略有降低,最佳反应条件为:反应压力4.0 MPa,体积空速2~3 h-1,反应温度220~260 ℃,氢油体积比300~500。加氢后的变压器废油基本满足变压器油的使用性能要求,说明该催化剂具有较高的选择性和较好的催化性能。

关键词: 变压器废油, 加氢, 再生, 催化剂

Abstract: Aiming at the problems of high acid number, deep color, bad oxidation stability and electric properties, and increasing power consumption of transformer insulating oil caused by high temperature oxidation and high voltage electric field, the direct hydrogenation regeneration of used transformer insulating oil(UTIO) was studied by using a self-made Ni-Mo-W regeneration catalyst, and the effects of the hydrogenation conditions on the properties and composition of UTIO were investigated. The results indicated that after the regeneration of UTIO by direct hydrogenation, the color became lighter, the anti-oxidation stability increased, and electricity properties improved, the metal, polychlorinated biphenyls and antioxidant content could not be detected, and the content of polycyclic aromatic hydrocarbons decreased. The optimum hydrogenation conditions were as follows: reaction pressure 4.0 MPa, space velocity 2-3 h-1, reaction temperature 220-260 ℃, and the hydrogen/oil volume ratio 300-500. The hydrogenated oil could meet the requirements of transformer insulating oils, which revealed that the catalyst had high selectivity and catalytic performance.

Key words: used transformer insulating oil, hydrogenation, regeneration, catalyst