I am having troubles retaining upper and lower temperatures in my stripper column. I have tried changing fluid levels, increasing steam, and having very little success at raising my temperatures.

 The reboiler has been hydroblasted less than a 6 months ago. Any helpful hints or things I can try to get this operating coorectly at the temperatures I need to properly strip the water from the product?

If you have water in your stripped product(globle valve), you can look at the following:

- Reboiler duty. Calc it from steam or condensate flow rate.
- Low top temp. Calc the water dew point overhead to make sure water can leave overhead.
- Vapour to liquid rate at bottom tray. You need a V/L mole ratio of at least 0.3-0.5 to properly strip water or H2S. This becomes a problem when you increase feed preheat too much.
- Lastly, if you control the reboiler duty on outlet temperture, make sure the temperature have a significant change for change in vaporization.

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