Question:
Which of the following is used to reclaim milk particles from the vapour current in a vacuum pan, to prevent excessive loss of valuable milk solids?
Which of the following is used to reclaim milk particles from the vapour current in a vacuum pan, to prevent excessive loss of valuable milk solids?
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Entrainment = "Carrying along." To "prevent loss" in an evaporator, always look for the "Separator" designed for vapor streams.
Updated On: Jul 23, 2026
- Cold separator
- Air separator
- Bi-directional separator
- Entrainment separator
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
During evaporation in a vacuum pan or evaporator, water boils off rapidly.
This fast-moving vapor can sometimes "carry over" or drag tiny droplets of liquid milk with it.
This phenomenon is called "entrainment."
If these droplets are not recovered, it results in a significant loss of expensive milk solids and can also cause pollution in the condenser cooling water.
Step 2: Detailed Explanation:
To solve this, an Entrainment Separator (also known as a mist eliminator or catch-all) is installed in the vapor path.
Its function is to physically remove the entrained liquid droplets from the vapor stream.
Common types include centrifugal separators (where the vapor spins, throwing heavy droplets to the walls) or mesh-type separators (where droplets hit a wire mesh and coalesce).
Once the droplets hit the separator surfaces, they run back down into the product chamber, thereby "reclaiming" the solids.
Let us evaluate the other options:
Cold separators (Option A) are types of cream separators that work at low temperatures.
Air separators (Option B) are used to remove air from milk lines to prevent foaming.
Bi-directional separators (Option C) is not a standard term used for particle reclamation in evaporators.
The entrainment separator is an essential component for the economic operation of any large-scale dairy evaporation system.
Step 3: Final Answer:
The component used is an Entrainment separator.
During evaporation in a vacuum pan or evaporator, water boils off rapidly.
This fast-moving vapor can sometimes "carry over" or drag tiny droplets of liquid milk with it.
This phenomenon is called "entrainment."
If these droplets are not recovered, it results in a significant loss of expensive milk solids and can also cause pollution in the condenser cooling water.
Step 2: Detailed Explanation:
To solve this, an Entrainment Separator (also known as a mist eliminator or catch-all) is installed in the vapor path.
Its function is to physically remove the entrained liquid droplets from the vapor stream.
Common types include centrifugal separators (where the vapor spins, throwing heavy droplets to the walls) or mesh-type separators (where droplets hit a wire mesh and coalesce).
Once the droplets hit the separator surfaces, they run back down into the product chamber, thereby "reclaiming" the solids.
Let us evaluate the other options:
Cold separators (Option A) are types of cream separators that work at low temperatures.
Air separators (Option B) are used to remove air from milk lines to prevent foaming.
Bi-directional separators (Option C) is not a standard term used for particle reclamation in evaporators.
The entrainment separator is an essential component for the economic operation of any large-scale dairy evaporation system.
Step 3: Final Answer:
The component used is an Entrainment separator.
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