Felixton mill evaporator station: final effect partial flash tank.

TL;DRAbstract

Severe spouting in the final effect evaporators at Felixton contributed to high undetermined loss. Tube leaks at the tube sheet interface were identified in the area of the feed pipe nozzles and were suspected of contributing to the spouting. Expansion of leaking tubes was necessary during the weekly shutdown. It was noticed that some of these tubes had to be expanded on a regular basis. Operation of the final effects was accompanied by a persistent banging or percussion. External feed rings had been modified and the banging was initially thought to be as a result of condensate hang-up. This was later identified to be as a result of feed flashing into the 5 th effect vessel. A partial flash tank was designed to reduce the flash into these vessels.

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