dogbertcountry2
Chemical
I have a vertical downflow line from the bottom of a scrubber to an accumulation tank. A horizontal branch line exists on the down line. There is a on/off valve on the branch line after a short section of connecting pipe. We have suspected that this line is plugging over time due to passing solids in the scrubber settling out in the branch line (probably from splashing or running down the side of the pipe).
We have shortened the connecting pipe and angled the branch slightly (20-30º) to allow the pipe to be self draining back to the downflow. A suggestion was made to put a small steam purge on the back side of the valve to further ensure no buildup. WE have done this in other slurry services in the plant.
My question is, does anyone have an idea as to how much steam is enough? Does anyone else do something like this? The other places that we have done this in the plant have just been with a small tubing connection at 15-20 psig of steam...
Any ideas?
We have shortened the connecting pipe and angled the branch slightly (20-30º) to allow the pipe to be self draining back to the downflow. A suggestion was made to put a small steam purge on the back side of the valve to further ensure no buildup. WE have done this in other slurry services in the plant.
My question is, does anyone have an idea as to how much steam is enough? Does anyone else do something like this? The other places that we have done this in the plant have just been with a small tubing connection at 15-20 psig of steam...
Any ideas?
