What does carryover refer to in boiler systems?

Carryover in boiler systems refers specifically to contaminants that exit the boiler along with steam. This phenomenon occurs when water droplets containing dissolved solids and other impurities are not completely separated from the steam before it leaves the boiler. As a result, these contaminants can be entrained in the steam, potentially leading to problems in steam distribution and end use, such as decreased efficiency in turbines or damage to downstream equipment.

It's crucial for boiler operators to monitor and control carryover to maintain steam quality and protect equipment. Strategies to reduce carryover often involve adjustments to water treatment processes, boiler operation, and design features such as steam separators or dryers.

In contrast, waste materials discarded from the boiler pertain to the maintenance and waste management aspect of boiler operation, rather than the carryover phenomenon. Heat energy not utilized in steam production pertains to energy efficiency rather than the contaminants that escape with steam. Water that remains inside the boiler typically refers to the non-steam phase and does not relate to carryover, which specifically concerns what exits the boiler with steam.