Where is boiler water with the highest dissolved solids concentration found?

Boiler water with the highest dissolved solids concentration is typically found just below the waterline of the steam drum. This is due to the process of steam formation, where as water evaporates to form steam, it leaves behind dissolved minerals and other solids. As steam is generated, the concentration of these dissolved solids increases in the remaining liquid water.

In a properly functioning boiler system, the steam drum is designed to separate the steam from the water and any impurities. The water that remains just below the waterline is affected by the continuous removal of steam, leading to a higher concentration of dissolved solids. This area is critical to monitor in order to prevent issues like scale formation, which can impair boiler efficiency and longevity.

In contrast, the bottom of the mud drum collects sediment and heavier particulates, which can include solids but not necessarily at a higher concentration than just below the waterline of the steam drum. The dynamics of water evaporation and steam production are key in determining the concentration levels in different parts of the boiler system.