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Strange top pressure issue in Distillation Column
We installed a new like-for-like condenser on a small distillation column. After startup, we couldn’t pull down vacuum like we used to on the column (500 mmHg now vs 350 mmHg before). After 2 air leaks were found, the top pressure improved slightly, however the top pressure still remained...- mp662
- Thread
- Replies: 13
- Forum: Chemical plant design & operations
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Storage tank with concrete floor
I have a firewater tank complying with NFPA code that requires an inspection every 3 years. It also requires an internal inspection complying with API 653. 3 years ago, it was inspected and the floor was shot. At that time, a concrete floor was poured in the tank and put back in service. Our...- mp662
- Thread
- Replies: 4
- Forum: Storage tank engineering
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Fixed tubesheet HX shell side cleaning
I have a fixed tubesheet heat exchanger with massive fouling on the shell side (design was 10 psig drop, now closer to 50 psig). Thermal scans of the exchanger show a large blockage in 2 baffled sections of the exchanger. Tried chemical cleaning it with a non-aggressive solution, but it did...- mp662
- Thread
- Replies: 8
- Forum: Chemical plant design & operations
