What device is used to mechanically remove oxygen from boiler feedwater?

Study for the Massachusetts 3rd Class Engineer Exam. Access flashcards and multiple choice questions with hints and explanations. Prepare for success on your exam!

The device used to mechanically remove oxygen from boiler feedwater is a deaerator. A deaerator functions by heating the water and creating a steam environment that reduces the solubility of gases, including oxygen, in the liquid. As the water is heated, the dissolved gases are released, and the steam is vented away. This process is essential to prevent corrosion in the boiler and associated piping systems, as dissolved oxygen can lead to oxidation of metal components, which may compromise the integrity and efficiency of the boiler.

Other devices mentioned, like steam traps, heat exchangers, and condensate collectors, serve different functions. Steam traps are used to remove condensate and non-condensable gases from steam lines, but they do not specifically target the removal of oxygen from feedwater. Heat exchangers transfer heat between two fluids but do not have a role in removing oxygen. Condensate collectors gather liquid condensate but do not involve the deaeration process necessary for feedwater treatment. Thus, the deaerator is specifically designed and employed for the critical task of oxygen removal from boiler feedwater.

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