新型分散型抗垢剂在常减压装置的工业应用

Industry application of new disperse anti-scaling agent in atmospheric and vacuum distillation unit

目的解决常减压装置运行过程中长期存在的严重结垢问题。方法在装置运行初期和末期分别加注了一种新开发的分散型抗垢剂HK-17DC,对其清垢、防垢效果进行了验证。结果加注该药剂后,装置运行末期减三中流量逐渐增大,维持在120~125 t/h,较加抗垢剂前提高20~25 t/h,初底油换热温差明显改善,基本维持在61~63℃,较加抗垢剂前提高了12~24℃;装置运行初期,减三中流量保持在245~252 t/h,较检修前上个周期运行初期增加了约125 t/h;初底油换热温差保持在66~69℃,较检修前上个周期运行初期升高约16℃。结论该抗垢剂在高温下表现出良好的清垢防垢性能,长周期运行效果稳定,且对产品质量无不良影响,解决了常减压装置存在已久的结垢问题。

Objective To solve the serious scaling problem of the atmospheric and vacuum distillation unit during operation.Methods A new dispersive anti-scaling agent HK-17DC was added at the initial and end stage of the operation of the unit to evaluate its removal and anti-scaling effect.Results After adding the agent,the flow rate of the reflux in the third middle section of vacuum tower gradually increased and remained between 120-125 t/h,it is 20-25 t/h higher than before adding the agent,and the oil heat exchange temperature difference at the bottom of the primary distillation tower was significantly improved,basically maintained at 61-63℃at the end of the unit operation.During the initial operation of the unit,it was 12-24℃higher than before,the flow rate of the reflux in the third middle section of vacuum tower was maintained at 245-252 t/h,compared with the initial period of operation before maintenance,it increased by 125 t/h,and the temperature difference of oil heat exchange at the bottom of the primary distillation tower was maintained at 66-69℃,compared with the initial period of operation before maintenance,it increased by 16℃.Conclusions At high temperature,the anti-scaling agent showed good scale removal and anti-scaling performance,the long-term operation effect was stable and had no adverse effect on the product quality.It solved the scaling problem of atmospheric and vacuum distillation unit for a long time.