Bubblers in distillation column

Bubblers in distillation column

it is about the a part of distillation column experiment some points and notes ……… Controls Bubbler → What is the bubbler used for? How is it a control? Units on pressure gauge of top of column → Inches of water Gauge pressure at the top of column in 10 in of water Cylindrical piece of glass and long skinny site glass connected by valve Mark on site glass is where it’s filled up to Liquid level is the same on both sides as site glass is open to the atmosphere How can you see bubbles when nitrogen is coming in? NOT bottom of bubbler → Port to drain Coming in the top Flowing through pipe → Fairly deep, not all the way Depth of pipe → 10 in of water Top pressure at the top of column is 10 in of water Nitrogen is pressurized in there If nitrogen pressure is less than 10 in of water, you won’t see gas flow because the column pressure it too low Nitrogen can bubble through when you get to 10 in of water Nitrogen exits the top of the bubbler through a pipe that goes to the wall → Another exit at top of bubbler How is this a control? NOT flow, but controls the pressure If we empty the bubbler out → 0 in of water (Column is now at atmospheric pressure) If we add more liquid in there, the pressure increases If the liquid level is low Can take a bucket of water and add to the site glass Will bring the liquid level up on both sides This is how you can increase the pressure at the top of the column