Fouling Prevention Tray Technology for Crude Oil Distillation Towers (Case Studies)
Significant reduction of phosphorus-derived fouling. The latest tray solution maintains processing capacity and operational stability.
This case study presents an example of resolving tray blockage caused by phosphates in a crude oil distillation unit (CDU) using fouling-resistant tray technology. Phosphate esters contained in high TAN crude oil and corrosion inhibitors decompose inside the tower and adhere to the openings as phosphates. This leads to the obstruction of vapor flow and results in the following issues: - Abnormal increase in differential pressure (DP) due to blockage of openings - Liquid accumulation in the LK-HK section - Deterioration of product quality such as color and flash point - Increase in tower pressure → decrease in evaporation rate → deterioration in yield - Resulting in a reduction in processing capacity To continue operations, a portion of the internal reflux was first bypassed (LKPA → HKPA) to adjust the section load. DP improved, and quality was restored. Furthermore, as a long-term measure, Koch-Glitsch's Superflux fouling-resistant trays were adopted. Key features: - Self-cleaning effect due to fixed valves - Suppression of solid retention and stable froth flow - Directional valves that reduce peripheral retention - Long-term stable operation even under severe fouling conditions Inspection after implementation showed that the phosphorus content, which was previously over 21%, was reduced to below 2%, and DP stabilized at 0.4 kg/cm². The fouling suppression effect was confirmed.
- 企業：Koch Asia Pacific Koch Glitsch
- 価格：Other
