What is the function of a blowdown tank?

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 function of a blowdown tank is to relieve flash steam and cool blowdown water. In boiler operations, blowdown refers to the process of removing a portion of water containing impurities in order to maintain water quality. When this blowdown water is released, it is often at a high temperature and pressure. The blowdown tank is designed to safely handle this high-temperature water and any steam that may flash off when the water is depressurized.

Within the blowdown tank, the water cools down, and the steam that is released can be vented safely. This process is critical for maintaining safe operating conditions and preventing damage to the system. The cooling of the blowdown water also helps in reducing the temperature of water before it is treated or disposed of, ensuring compliance with environmental regulations.

In contrast, the other options do not accurately describe the primary function of a blowdown tank. A blowdown tank does not store excess fuel, maintain positive pressure in the system, or recycle condensate back into the boiler. Each of those functions pertains to different components and systems within boiler operations.

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