What does 'carryover' refer to in steam generation?

Carryover in steam generation specifically refers to the transfer of water droplets along with the steam as it is produced. This phenomenon can occur when there are impurities or excessive amounts of water in the steam drum, leading to portions of the liquid phase being entrained in the steam flow. Such carryover can adversely impact downstream equipment and processes by introducing water into steam lines, which can cause issues like corrosion, reduced efficiency, and operational problems in turbines and other components utilizing steam.

The identification of carryover as the transfer of water droplets emphasizes the importance of maintaining proper water chemistry and steam purity in steam generation systems. Proper operation of separators and maintaining appropriate water levels in steam drums are critical to minimize carryover and ensure efficient operation.