常减压装置缓蚀剂自动加注系统

Automatic Corrosion Inhibitor Injection System for Atmospheric-vacuum Distillation Unit

通过在常减压蒸馏装置实施缓蚀剂自动加注系统,从而提高了常顶系统、减顶系统缓蚀剂加注的平稳率,可将缓蚀剂的加注量控制在缓蚀效果最佳的控制点。缓蚀剂自动加入通过在线测定塔顶回流罐冷凝水的pH值进行控制、调节。自动加注系统投用后,常顶V-4冷凝水在线pH测量值最高为7.9,最低为6.8;减顶V-6冷凝水在线pH计测量值最高为9.0,最低为6.2,达到了预期效果。

The installation of automatic corrosion inhibitor injection system has improved the injection operation stability and controlled the dosage at the optimal point. The automatic injection is controlled by on - line measurement of pH value of condensate water in the tower overhead reflux drum. After the automatic injection system was commissioned, the measured highest pH value of condensate in atmospheric tower overhead V - 4 is 7.9 and the lowest is 6.8 ; The measured highest pH value of condensate in vacuum tower overhead V - 4 is 9.0 and the lowest is 6.2. Expectcd results have been achieved.