硫化亚铁钝化清洗剂在芳烃重整装置中的应用

Application of ferrous sulfide passivation cleaning agent in aromatics reforming unit

在原油的加工、炼制和储存过程中,都会产生容易自燃的硫化亚铁。在设备检修过程中,当设备处于开放状态时,附着于设备表面的硫化亚铁及油垢就会与空气中的氧气接触,发生强烈的化学反应造成自燃。针对硫化亚铁的自燃问题,研发了一种复合型硫化亚铁钝化清洗剂,并在芳烃重整装置预加氢汽提塔及回流罐中实现了工业应用。装置钝化清洗情况及废液排放情况表明,所研发的硫化亚铁钝化清洗剂不仅对硫化亚铁垢层具有较好的清洗作用,而且能够满足安全环保要求。通过对钝化清洗剂的生产及清洗过程进行总结,明确了下一步的研发方向,并提出了合理化建议。

Ferrous sulfide is easily generated during processing,refining and storage of crude oil.When the unit is in an open state during maintenance,ferrous sulfide and oil stains attached to the surface of aromatics reforming unit come into contact with oxygen in the air,spontaneous combustion occurs.A kind of composite ferrous sulfide passivation cleaning agent was developed and applied industrially in pre-hydrogenation stripper and reflux tank of aromatics reforming unit.The performance of passivation cleaning and waste liquid discharging indicated that the agent not only has a good cleaning effect on ferrous sulfide scale layer,but also meets the safety and environmental protection requirement.By summarizing the production and cleaning process of passivation cleaning agent,future research and development direction was made,reasonable suggestions were proposed.