Question

Which of the following is not a basic part of an evaporator?

• A. Calandria
• B. Vapour separator
• C. Entrainment separator
• D. Barometric leg

Hint:

To remember: Calandria, Vapour space, and Separators are the "heart" of the evaporator. The Barometric leg is an "accessory" used in the downstream condensation stage.

Answer 1

The Correct Option is D

An evaporator's core job is to boil off liquid and separate the resulting vapour cleanly from the concentrated product, and its basic parts reflect exactly that. The calandria is the heating section where the actual boiling happens, the vapour separator pulls the steam away from the liquid, and the entrainment separator stops small liquid droplets from escaping along with the vapour. The barometric leg, though, belongs to the condenser system that maintains vacuum downstream, not to the evaporator body itself. So the part that is not a basic component of the evaporator is the barometric leg.