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Roy, Your statement of calling it co-current makes it easy to calculate the maximum dT's you can achieve, since a true co-current HX can't have the temperatures cross. (But take the following with a grain of salt as a plate-and-frame is probably not co-current) Since both sides are water, the...

As a follow-up to 25362's posts..... The specific gravity profile of sulfuric acid flattens out just before that maximum point so other properties (e.g. refractive index, sonic velocity) are usually used in this concentration range. If you intend to mix acid and water samples, please use...

Hello Gustoha, A few things come to mind here... Assuming your overhead composition does not change, the only way I can see a lower top temperature is by lowering the head pressure - you'll have to be sure your vacuum system is capable of achieving this. Your overall reboiler duty will...

On the heat of mixing (dilution) issue - there are Enthalpy diagrams available that can fairly easily allow you to calculate the final temperature of a mixture of any strengths of sulfuric (from 0% to various oleum concentrations). This chart can also demonstrate why the "Add Acid To Water"...

Do you have the option to use a low-pressure steam blanket instead of Nitrogen? Maintain a slight positive pressure on the tank to exclude air.

If you're set on using a pump to move the water to the measuring device, I agree with Katmar - check with the manufacturer. I tend to throw in my 2 cents worth (and I have a handful of pennies). How accurate does the reading have to be? Would pumping a low flowrate stream into a building affect...