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[curious_cat]

In many applications steam traps drain condensate. But when you have steam condensing at sub-atmospheric pressures what are typical options used to drain condensate?

 

e.g. In intermediate effects of a Multi Effect Evaporator steam from previous effect is used to heat and this is often under a decently high vacuum. say 200 mm Hg abs. 

 

Most articles I checked out don't elaborate much about draining the drips / condensate part. 

 

Elevating the whole unit to make the system gravity draining seems unwieldy; you might need to elevate the heat exchangers say 20 ft?  Or do people provide a condensate pump for each such unit? Or are there special traps that can drain from a vacuum?

 

Would love to hear people's experiences. 

Edited by curious_cat, 31 March 2015 - 11:05 PM.

[ankur2061]

Consider using a pressure-powered pump for such a service. Refer the links below:

 

http://www2.spiraxsa...steam-traps.asp

 

For multi-effect evaporator condensate handling Spirax-Sarco and Armstrong provide their own specific solution.

 

http://www2.spiraxsa...pplications.asp

 

http://www.carotek.c...n-Guide-101.pdf

 

Regards,

Ankur