What is the primary purpose of the steam separator in the steam drum?

What is the primary purpose of the steam separator in the steam drum?

• A. Remove entrained water droplets
• B. Increase steam pressure
• C. Mix feedwater
• D. Filter solids

Answer: (A)

The primary purpose is to remove entrained water droplets from the steam leaving the drum. As steam forms, tiny droplets can ride along with the vapor. If they reach the turbine, they cause erosion, corrosion, and efficiency loss. The steam separator uses guiding surfaces and flow-dividing elements (like baffles or cyclones) to slow the steam, let the droplets separate due to inertia, and drain them back into the water. The result is drier, higher-quality steam that protects equipment and improves performance. This isn’t about increasing pressure, mixing feedwater, or filtering solids—the separator’s job is specifically to improve steam dryness.

The primary purpose is to remove entrained water droplets from the steam leaving the drum. As steam forms, tiny droplets can ride along with the vapor. If they reach the turbine, they cause erosion, corrosion, and efficiency loss. The steam separator uses guiding surfaces and flow-dividing elements (like baffles or cyclones) to slow the steam, let the droplets separate due to inertia, and drain them back into the water. The result is drier, higher-quality steam that protects equipment and improves performance.

This isn’t about increasing pressure, mixing feedwater, or filtering solids—the separator’s job is specifically to improve steam dryness.