What does the Deaerating Feed Tank (DFT) heat and store?

What does the Deaerating Feed Tank (DFT) heat and store?

• A. Feed water.
• B. Boiler water.
• C. Condensate.
• D. Steam.

Answer: (A)

Deaerating the feedwater before it reaches the boiler removes dissolved gases and raises the water temperature, and the tank provides a stored, ready supply of this treated water for the boiler feed system. By heating the water, gases like oxygen are driven out and vented, reducing corrosion inside the boiler. Storing the heated, deaerated water ensures a steady, reliable feed to the boiler even during demand fluctuations and helps protect the boiler from thermal shock. This tank is specifically for feedwater, not boiler water, condensate, or steam, which is why the correct choice is feed water.

Deaerating the feedwater before it reaches the boiler removes dissolved gases and raises the water temperature, and the tank provides a stored, ready supply of this treated water for the boiler feed system. By heating the water, gases like oxygen are driven out and vented, reducing corrosion inside the boiler. Storing the heated, deaerated water ensures a steady, reliable feed to the boiler even during demand fluctuations and helps protect the boiler from thermal shock. This tank is specifically for feedwater, not boiler water, condensate, or steam, which is why the correct choice is feed water.