I've looked but cant find the info I need to build this thing and rather than learn all about process engineering I thought I'd ask you knowledgeable people.
How important is the riser open area compared to downcomer size? Is it just a velocity increase without much issue.
My design for a 54mm column will be 32 mm caps over a 25 mm riser with a 12.5 mm downcomer.
Calculations show that with the 1/2" downcomer going through the riser it will allow the same vapour path as a 20mm riser. Will this be enough?
I also worked out that if increase the size of the downcomer to 3/4" I'll be left with a vapour path equivalent to an approx 16mm tube. Will this be enough as it would dramatically increase the downcomer path.
I know this is only a small column and I'm eying off a 3 meter length of 4" copper tube stashed at the back of the workshop I might be able to trade later for a standard mine currency payment (carton) for the column and stainless for the rest.
This is going to fill the gap until then I hope.
Cheers,
Warra