Where is a demister typically installed?

Where is a demister typically installed?

• A. At the gas outlet
• B. In the liquid sump
• C. Inside the shell near a nozzle
• D. On the vent line

Answer: (A)

A demister is placed in the path of the exiting gas to remove entrained liquid droplets before the gas leaves the vessel. Its job is to coalesce and capture droplets so the downstream equipment isn’t fouled or damaged by liquid carryover. If it were placed in the liquid sump or inside the shell near a nozzle, it wouldn’t intercept droplets in the gas stream. Placing it on the vent line would also miss the critical point where the droplets are still present as the gas exits the vessel.

A demister is placed in the path of the exiting gas to remove entrained liquid droplets before the gas leaves the vessel. Its job is to coalesce and capture droplets so the downstream equipment isn’t fouled or damaged by liquid carryover. If it were placed in the liquid sump or inside the shell near a nozzle, it wouldn’t intercept droplets in the gas stream. Placing it on the vent line would also miss the critical point where the droplets are still present as the gas exits the vessel.