Question 40General Subjects - 1st Asst/Chief

The correct answer is D) demisters. In a flash-type evaporator, small droplets of water entrained in the flashed vapor are removed by demisters. Demisters are devices that use wire mesh, perforated plates, or other specialized materials to capture and coalesce these fine water droplets, allowing the purified vapor to continue through the system. The other options are incorrect because: A) spray pipes are used to distribute the feed water, not remove entrained droplets; B) condensers condense the purified vapor, but do not specifically remove the entrained droplets; and C) splash baffles help to direct the flow of the liquid, but do not primarily function to remove the fine water droplets from the vapor.